Patent Description:
The present application relates to a technical field of battery manufacturing equipment, and in particular, to a roll replacing device and a tab welding apparatus.

In a manufacturing process of lithium batteries, it is necessary to wind a cathode plate, a separator, and an anode plate to form a battery cell. Before the plates enter a winding device for winding, tabs need to be welded at specific positions of the plates, and then the tabs are wound together with the plates.

Generally, the tabs are provided by a method of unwinding a material roll, so when a tab material roll is used up, it needs to be replaced with a new tab material roll. At present, in actual production, replacement of the tab material roll is done manually, which leads to long downtime, reduces productivity, and increases labor cost.

<CIT> deals with reel unwinding techniques for webs to feed, particularly in continuous operation, printing machines, coaters, sheeters or other converting presses, and consists in an unwinding machine. <CIT> discloses an unwinding machine including two reelstand towers (<NUM>) covered by an overhead bridge (<NUM>) supporting a web accumulator (<NUM>), and two splicing cases (<NUM>) adapted to splice webs at zero speed each being linked to one of the reelstand towers (<NUM>) and rolling along rails fastened under the bridge (<NUM>). Each reelstand tower (<NUM>) is constituted by a frame (<NUM>) connected to the bridge (<NUM>) and a mobile frame (<NUM>) movable on the frame (<NUM>) perpendicularly to the bridge length (<NUM>), this frame (<NUM>) bearing also a device (<NUM>) to vertically move the cantilever spindle (<NUM>) to be inserted into the new reel core (<NUM>) to be unwound and following the transverse movements of the corresponding splicing case (<NUM>). The mobile frame (<NUM>) either follows rails on the frame (<NUM>), or rolls on this frame (<NUM>), the transverse movement being power controlled.

Based on this, it is necessary to provide a roll replacing device according to claim <NUM> and a tab welding apparatus according to claim <NUM> that improve above-mentioned defects of a problem of long downtime and increased labor cost due to manual replacement of rolls in the prior art in order to replace tab material rolls.

In one embodiment, the first fixing mechanism and the second fixing mechanism are respectively located on both sides of the strip connection station in a third direction perpendicular to the first direction, and the cutting mechanism and the strip connection mechanism are respectively located on both sides of the strip connection station in a second direction, and the second direction are perpendicular to the first direction and the third direction.

In one embodiment, the cutting mechanism includes an adjusting assembly and two cutting assemblies mated and connected to the adjusting assembly, and each of the cutting assemblies has a first cutter and a second cutter cooperated to the first cutter for cutting;.

In one embodiment, the cutting mechanism further includes a moving assembly, the moving assembly is provided on the sliding bracket and is connected with the adjusting assembly by transmission, to controllably drive the adjusting assembly to move along a fourth direction at an angle to the first direction until both the cutting assemblies are located between the working material strip and the spare material strip at the strip connection station.

In one embodiment, the moving assembly includes a moving driving member mounted to the sliding bracket and a moving plate drivingly connected with the moving driving member. The adjusting assembly is mounted to the moving plate, and the moving driving member is used to drive the moving plate to move along the fourth direction.

In one embodiment, each of the cutting assemblies further includes a mounting base movably connected to the moving plate along the first direction, and the first cutter and the second cutter are mounted to the mounting base.

The mounting bases of the two cutting assemblies are both drivingly connected with the adjusting assembly, so as to be driven by the adjusting assembly to approach or away from each other along the first direction.

In one embodiment, the first fixing mechanism has a first fixing position and a second fixing position spaced along the first direction. The first fixing position and the second fixing position are used for fixing the working material strip and the spare material strip.

In one embodiment, the unwinding assembly comprises a first unwinding assembly and a second unwinding assembly, the first unwinding assembly and the second unwinding assembly are provided on both sides of the sliding bracket in the first direction, respectively; the first unwinding assembly is used to unwind and output a material strip that can be used as the working material strip or the spare material strip to the first fixing mechanism; the second unwinding assembly is used to unwind and output a material strip that can be used as the spare material strip or the working material strip to the first fixing mechanism;
the first fixing position is arranged corresponding to the first unwinding assembly such that the first fixing position is used to tightly clamp or release the material strip that is unwound and output from the first unwinding assembly; the second fixing position is arranged corresponding to the second unwinding assembly, so that the second fixing position is used to tightly clamp or release the material strip that is unwound and output from the second unwinding assembly.

In one embodiment, the first fixing mechanism includes a clamping driving member mounted on the sliding bracket and two clamping blocks drivingly connected with the clamping driving member. The first fixing position and the second fixing position are formed between the two clamping blocks, and the clamping driving member is used to drive the two clamping blocks to clamp or release each other.

In one embodiment, the second fixing mechanism includes a first fixing assembly, a second fixing assembly, and a third fixing assembly, and the first fixing assembly and the second fixing assembly are located on both sides of the third fixing assembly in the first direction, respectively; during movement of the sliding bracket along the first direction, the first fixing position and the second fixing position can be alternately aligned with the third fixing assembly;.

In one embodiment, the strip connection mechanism includes a tape sticking assembly comprising a tape sticking driving member and two tape sticking suction cups drivingly connected to the tape sticking driving member, and at least one of the two tape sticking suction cups is used to suck up adhesive tapes. The tape sticking driving member is used to drive the two tape sticking suction cups to be in a closed state to stick the adhesive tapes on the tape sticking suction cups to the working material strip and the spare material strip aligned at the strip connection station.

In one embodiment, the strip connection mechanism further includes a translation driving member and a driving block; the translation driving member is drivingly connected to the driving block, and the tape sticking driving member is mounted to the driving block; and the translation driving member is used to drive the driving block to move between a tape spare position where the tape sticking suction cups suck up the adhesive tapes and a tape sticking position where the tape sticking suction cups stick the adhesive tapes on the working material strip and the spare material strip.

In one embodiment, the strip connection mechanism further includes a tape spare plate arranged on the tape spare position, and at least one side surface of the tape spare plate is used for sticking the adhesive tapes; and
when the driving block moves to the tape spare position, the tape sticking driving member drives the two tape sticking suction cups to be in the closed state, so that the tape sticking suction cups suck the tape on the tape spare plate.

In one embodiment, the tape sticking driving member is used to drive the two tape sticking suction cups to rotate in opposite direction to each other to the closed state and a flat state.

A tab welding apparatus comprising the roll replacing device as described in any of the above embodiments.

In the above-mentioned roll replacing device and tab welding apparatus, in actual operations, the working material strip unwound and output from the unwinding assembly passes through the first fixing mechanism, the strip connection station, and the second fixing mechanism successively, and is conveyed downstream. The starting end of the spare material strip unwound and output from the unwinding assembly passes through the first fixing mechanism and the strip connection station successively, and is fixed to the second fixing mechanism.

When the working material strip on the unwinding assembly is used up and needs to be replaced, firstly, the first fixing mechanism fixes the working material strip and the spare material strip unwound and output from the unwinding assembly at a same time, and the second fixing mechanism also fixes the working material strip (at this time, the working material strip is jointly fixed by the first fixing mechanism and the second fixing mechanism, and the spare material strip is also jointly fixed by the first fixing mechanism and the second fixing mechanism). Then, the cutting mechanism cuts off the working material strip and the spare material strip at the strip connection station. Then, the sliding bracket drives the first fixing mechanism to move along the first direction until the cut-off end of the spare material strip fixed to the first fixing mechanism and the cut-off end of the working material strip fixed to the second fixing mechanism are aligned at the strip connection station. Then, the strip connection mechanism connects the cut-off end of the working material strip and the cut-off end of the spare material strip which are aligned at the strip connection station. Finally, the first fixing mechanism releases the fixing of the spare material strip and the second fixing mechanism also releases the fixing of the working material strip, so that the spare material strip unwound and output from the unwinding assembly passes through the first fixing mechanism, the strip connection station, and the second fixing mechanism successively and is conveyed downstream, i.e., the spare material strip unwound and output from the unwinding assembly is converted into the working material strip. In addition, at this time, a used-up material roll on the unwinding assembly can be replaced, and a material strip output from a new material roll can be used as a spare material strip, and a starting end of the spare material strip is pulled out of the first fixing mechanism and the strip connection station successively and fixed to the second fixing mechanism in preparation for next roll replacing.

In this way, the roll replacing device in the present application can realize automatic switching of the working material strip and the spare material strip (i.e., automatic roll replacing), which greatly reduces downtime, improves productivity, and reduces labor cost compared to the manual roll replacing method used in the prior art.

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the attached claims. Therefore, the present application is not limited by the specific embodiments disclosed below.

Referring to <FIG>, a roll replacing device is provided in an embodiment of the present application and comprises an unwinding mechanism <NUM>, a first fixing mechanism <NUM>, a second fixing mechanism <NUM>, a cutting mechanism <NUM>, and a strip connection mechanism <NUM>.

The unwinding mechanism <NUM> comprises a sliding bracket <NUM> and an unwinding assembly (not shown) mounted on the sliding bracket <NUM>. The sliding bracket <NUM> is configured to controllably move along a first direction. The unwinding assembly is used for outputting a working material strip and a spare material strip. That is, the unwinding assembly can output two material strips, wherein one of the two material strips is the working material strip, and another one is the spare material strip. The first fixing mechanism <NUM> is provided on the sliding bracket <NUM> to move with the sliding bracket <NUM> along the first direction. The first fixing mechanism <NUM> is located downstream of the unwinding assembly, and is capable of controllably fixing the working material strip and the spare material strip output from the unwinding assembly. The second fixing mechanism <NUM> is arranged downstream of the first fixing mechanism <NUM> to form a strip connection station c between the first fixing mechanism <NUM> and the second fixing mechanism <NUM>. The second fixing mechanism <NUM> is capable of controllably fixing a working material strip and a spare material strip passing through the first fix mechanism <NUM>. Wherein the working material strip and the spare material strip located between the first fixing mechanism <NUM> and the second fixing mechanism <NUM> (i.e., the strip connection station c) are arranged at intervals along the first direction. The cutting mechanism <NUM> is arranged corresponding to the strip connection station c, and is used for cutting off the working material strip and the spare material strip located at the strip connection station c. The strip connection mechanism <NUM> is arranged corresponding to the strip connection station c. Preferably, the cutting assembly <NUM> is provided on the sliding bracket <NUM> to move with the sliding bracket <NUM> along the first direction.

Wherein, the first fixing mechanism <NUM> is capable of following the sliding bracket <NUM> to move along the first direction until the spare material strip fixed by the first fixing mechanism <NUM> and the working material strip fixed by the second fixing mechanism <NUM> are aligned at the strip connection station c, and the strip connection mechanism <NUM> is allowed to connect the working material strip and the spare material strip which are aligned at the strip connection station c.

In the above-mentioned roll replacing device, in actual operations, the working material strip unwound and output from the unwinding assembly passes through the first fixing mechanism <NUM>, the strip connection station c, and the second fixing mechanism <NUM> successively, and is conveyed downstream. A starting end of the spare material strip unwound and output from the unwinding assembly passes through the first fixing mechanism <NUM> and the strip connection station c successively and is fixed to the second fixing mechanism <NUM>.

When the working material strip on the unwinding assembly is used up and needs to be replaced, firstly, the first fixing mechanism <NUM> fixes the working material strip and the spare material strip unwound and output from the unwinding assembly at a same time, and the second fixing mechanism <NUM> also fixes the working material strip (at this time, the working material strip is jointly fixed by the first fixing mechanism <NUM> and the second fixing mechanism <NUM>, and the spare material strip is also jointly fixed by the first fixing mechanism <NUM> and the second fixing mechanism <NUM>). Then, the cutting mechanism <NUM> cuts off the working material strip and the spare material strip located at the strip connection station c. Then, the sliding bracket <NUM> drives the first fixing mechanism <NUM> to move along the first direction until a cut-off end of the spare material strip fixed to the first fixing mechanism <NUM> and a cut-off end of the working material strip fixed to the second fixing mechanism <NUM> are aligned at the strip connection station c. Then, the strip connection mechanism <NUM> connects the cut-off end of the working material strip and the cut-off end of the spare material strip which are aligned at the strip connection station c. Finally, the first fixing mechanism <NUM> releases the fixing of the spare material strip and the second fixing mechanism <NUM> also releases the fixing of the working material strip, so that the spare material strip unwound and output from the unwinding assembly passes through the first fixing mechanism <NUM>, the strip connection station c, and the second fixing mechanism <NUM> successively and is conveyed downstream, i.e., the spare material strip unwound and output from the unwinding assembly is converted into a working material strip. In addition, at this time, a used-up material roll on the unwinding assembly can be replaced, and the material strip output from a new material roll can be used as a spare material strip, and the starting end of the spare material strip is pulled out of the first fixing mechanism <NUM> and the strip connection station c successively and fixed to the second fixing mechanism <NUM> in preparation for next roll replacing.

In this way, the roll replacing device of the present application can realize automatic switching of the working material strip and the spare material strip (i.e., automatic roll replacing), which greatly reduces downtime, improves productivity, and reduces labor cost compared to a manual roll replacing method used in the prior art. It should be noted that the working material strip refers to the material strip that is unwound and output from the unwinding assembly, passes through the first fixing mechanism <NUM>, the strip connection station c, and the second fixing mechanism <NUM> successively, and is conveyed downstream. The spare material strip refers to the material strip that is unwound and output from the unwinding assembly and the starting end thereof passes through the first fixing mechanism <NUM> and the strip connection station c successively, and is fixed to the second fixing mechanism <NUM> without being conveyed downstream. It can be understood that after the automatic roll replacing, the spare material strip is switched to the working material strip and conveyed downstream, and the material strip unwound from a replaced new material roll is used as the spare material strip.

It should also be noted that the working material strip and the spare material strip unwound and output from the unwinding assembly can be tab material strips. Of course, in some other embodiments, other types of material strips may also be used, which is not limited here.

It should also be noted that in one embodiment, the cutting mechanism <NUM> is used to cut off the working material strip and the spare material strip at the strip connection station c along a cutting line parallel to the first direction, so that the cut-off end of the spare material strip fixed by the first fixing mechanism <NUM> and the cut-off end of the working material strip fixed by the second fixing mechanism <NUM> are aligned in the first direction, so as to prevent the cut-off end of the working material strip and the cut-off end of the spare material strip from overlapping at a place of strip connection. Of course, other forms of the cutting line can also be used to cut off the working material strip and the spare material strip at the strip connection station c, as long as it can be ensured that the cut-off end of the working material strip and the cut-off end of the spare material strip at the place of strip connection do not overlap, which is not limited here.

Specifically, in the embodiment, the unwinding mechanism <NUM> further includes a base <NUM> and a switching driving member <NUM>, and the sliding bracket <NUM> is movably connected to the base <NUM> along the first direction. The switching driving member <NUM> is mounted on the base <NUM> and is connected to the sliding bracket <NUM> by transmission, so as to drive the sliding bracket <NUM> to move along the first direction relative to the base <NUM>, thereby driving the first fixing mechanism <NUM> and the cutting mechanism <NUM> to move together along the first direction, and thus making the cutting mechanism <NUM> be fixed relative to the first fixing mechanism <NUM>, ensuring that the working material strip and the spare material strip can always be cut off at the strip connection station c, and enabling the first fixing mechanism <NUM> to drive the cut-off spare material strip to move until it is aligned with the working material strip fixed by the second fixing mechanism <NUM>, so that the strip connection mechanism <NUM> can connect strips, thus realizing the switching of the working material strip and the spare material strip. Optionally, the switching driving member <NUM> may be a cylinder.

Further, the base <NUM> is mounted with a switching sliding rail <NUM>, and the sliding bracket <NUM> is mounted with a switching sliding block <NUM>, and the switching sliding block <NUM> is slidably cooperated with the switching sliding rail <NUM>, so that the sliding bracket <NUM> is movable along the first direction relative to the base <NUM> by sliding the switching sliding block <NUM> relative to the switching sliding rail <NUM>, and making movement of the sliding bracket <NUM> more stable and reliable. Of course, in other embodiments, the switching sliding block <NUM> can also be mounted on the base <NUM>, and the switching sliding rail <NUM> can be mounted on the sliding bracket <NUM>, as long as it can realize that the sliding bracket <NUM> is movable along the first direction relative to the base <NUM>, which is not limited here.

In the embodiment of the present application, the unwinding assembly includes a first unwinding assembly <NUM> and a second unwinding assembly, and the first unwinding assembly <NUM> and the second unwinding assembly are provided on both sides of the sliding bracket <NUM> in the first direction, respectively. The first unwinding assembly <NUM> is used to unwind and output a material strip a that can be used as the working material strip or the spare material strip to the first fixing mechanism <NUM>. The second unwinding assembly is used to unwind and output a material strip b that can be used as the spare material strip or the working material strip to the first fixing mechanism <NUM>. In other words, when the first unwinding assembly <NUM> unwinds and outputs the material strip a as the working material strip, the second unwinding assembly unwinds and outputs the material strip b as the spare material strip; when the first unwinding assembly <NUM> unwinds and outputs the material strip a as the spare material strip, the second unwinding assembly unwinds and outputs the material strip b as the working material strip.

Specifically, in the embodiment, the first unwinding assembly <NUM> includes a first material shaft <NUM> and a first unwinding driving member <NUM>, and the first material shaft <NUM> is rotatably connected to the sliding bracket <NUM> around its own axis. The first unwinding driving member <NUM> is mounted on the sliding bracket <NUM> and is connected to the first material shaft <NUM> by transmission to drive the first material shaft <NUM> to rotate around its own axis, thereby driving a material roll mounted on the first material shaft <NUM> to rotate and unwind.

The second unwinding assembly includes a second material shaft and a second unwinding driving member, and the second material shaft is rotatably connected to the sliding bracket <NUM> around its own axis. The second unwinding driving member is mounted to the sliding bracket <NUM> and is connected to the second material shaft by transmission to drive the second material shaft to rotate around its own axis, thereby driving a material roll mounted on the second material shaft to rotate and unwind.

Specifically, in the embodiment, the unwinding mechanism <NUM> further includes a mounting shaft <NUM> which is fixedly mounted to the sliding bracket <NUM>, and the first material shaft <NUM> and the second material shaft are respectively sleeved on both ends of the mounting shaft <NUM> by bearings, such that the first material shaft <NUM> and the second material shaft can rotate relative to the mounting shaft <NUM>.

Specifically, in the embodiment, the first unwinding driving member <NUM> can be connected to the first material shaft <NUM> by a belt transmission structure. Specifically, an output shaft of the first unwinding driving member <NUM> is mounted with a first driving wheel <NUM>, and a first driven wheel is mounted on the first material shaft <NUM>, and a first transmission belt <NUM> is sleeved between the first driving wheel <NUM> and the first driven wheel, so that the first unwinding driving member <NUM> drives the first driving wheel <NUM> to rotate, and the first driving wheel <NUM> drives the first driven wheel to rotate through the first transmission belt <NUM>, and the first driven wheel then drives the first material shaft <NUM> to rotate, thus realizing rotating and unwinding of the material strip a by the material roll installed on the first material shaft <NUM>. Optionally, the first unwinding driving member <NUM> may be a motor.

Of course, in other embodiments, the first unwinding driving member <NUM> may also be connected to the first material shaft <NUM> by transmission by other transmission structures, such as chain transmission structures, gear tranamission structures, etc., which is not limited here.

Specifically, in the embodiment, the second unwinding driving member can be connected to the second material shaft by a belt transmission structure. Specifically, an output shaft of the second unwinding driving member is mounted with a second driving wheel, and the second material shaft is mounted with a second driven wheel, and a second transmission belt is sleeved between the second driving wheel and the second driven wheel, so that the second unwinding driving member drives the second driving wheel to rotate, and the second driving wheel drives the second driven wheel to rotate through the second transmission belt, and the second driven wheel then drives the second material shaft to rotate, thus realizing unwinding and outputting of the material strip by the material roll installed on the second material shaft. Optionally, the second unwinding driving member may be a motor.

Of course, in other embodiments, the second unwinding driving member may also be connected to the second material shaft by transmission by other transmission structures, such as chain transmission structures, gear transmission structures, etc., which is not limited here.

In the embodiment of the present application, the first fixing mechanism <NUM> and the second fixing mechanism <NUM> are respectively located on both sides of the strip connection station c in a third direction perpendicular to the first direction, and the cutting mechanism <NUM> and the strip connection mechanism <NUM> are respectively located on both sides of the strip connection station c in a second direction, and the second direction is perpendicular to the first direction and the third direction, so that the first fixing mechanism <NUM>, the second fixing mechanism <NUM>, the cutting mechanism <NUM>, and the strip connection mechanism <NUM> are more compactly arranged around the strip connection station c, and the structure of the roll replacing device is compact and conducive to improving space utilization.

Specifically, in the embodiment shown in <FIG>, the first direction is a direction perpendicular to a paper surface, the second direction is a left-and-right direction, and the third direction is an up-and-down direction. The first fixing mechanism <NUM> is located above the strip connection station c, the second fixing mechanism <NUM> is located below the strip connection station c, the cutting mechanism <NUM> is located on a left side of the strip connection station c, and the strip connection mechanism <NUM> is located on a right side of the strip connection station c.

Referring to <FIG>, in the embodiment of the present application, the first fixing mechanism <NUM> has a first fixing position <NUM> and a second fixing position <NUM> arranged at intervals along the first direction. The first fixing position <NUM> and the second fixing position <NUM> are used to fix the working material strip and the spare material strip. In this way, one of the material strips unwound and output from the unwinding assembly enters the strip connection station c through the first fixing position <NUM>, and another material strip enters the strip connection station c through the second fixing position <NUM>, and the first fixing mechanism <NUM> fixes the two material strips (i.e., the working material strip and the spare material strip) to the first fixing position <NUM> and the second fixing position <NUM> respectively when the roll needs to be replaced, so as to realize simultaneous fixing of the working material strip and the spare material strip.

Specifically, in the embodiment, the first fixing mechanism <NUM> includes a clamping driving member <NUM> mounted on the sliding bracket <NUM> and two clamping blocks <NUM> drivingly connected with the clamping driving member <NUM>. The first fixing position <NUM> and the second fixing position <NUM> are formed between the two clamping blocks <NUM>. The clamping driving member <NUM> is used to drive the two clamping blocks <NUM> to tightly clamp or release each other. When the clamping driving member <NUM> drives the two clamping blocks <NUM> to tightly clamp with each other, the two clamping blocks <NUM> simultaneously tightly clamp the two material strips unwound and output from the unwinding assembly at the first fixing position <NUM> and the second fixing position <NUM>, respectively. When the clamping driving member <NUM> drives the two clamping blocks <NUM> to release, the two clamping blocks <NUM> simultaneously release clamping of the two material strips unwound and output from the unwinding assembly. The first fixing mechanism <NUM> can realize simultaneous clamping or releasing of the two material strips, a structure of the first fixing mechanism <NUM> is simple, and the clamping of the two material strips is stable and reliable.

Optionally, the clamping driving member <NUM> may be a clamping cylinder, and the two clamping blocks <NUM> are respectively mounted on two clamping driving ends of the clamping cylinder, so that the clamping driving member <NUM> can drive the two clamping blocks <NUM> to clamp or release.

Further, the two clamping blocks <NUM> extend longitudinally along the first direction, and the first fixing position <NUM> and the second fixing position <NUM> are respectively located at two longitudinal ends of the two clamping blocks <NUM>. On one hand, the two material strips unwound and output from the unwinding assembly pass through the first fixing position <NUM> and the second fixing position <NUM> respectively to prevent the two material strips from interfering with each other when moving; on another hand, when the two clamping blocks <NUM> tightly clamp, the two material strips unwound and output from the unwinding assembly are tightly clamped at a same time, and when the two clamping blocks <NUM> release, the two material strips unwound and output from the unwinding assembly are unclamped at a same time.

Specifically, in one embodiment, the first fixing position <NUM> is arranged corresponding to the first unwinding assembly <NUM> such that the first fixing position <NUM> is used to tightly clamp or release the material strip a (the working material strip or the spare material strip) that is unwound and output from the first unwinding assembly <NUM>. The second fixing position <NUM> is arranged corresponding to the second unwinding assembly, so that the second fixing position <NUM> is used to tightly clamp or release the material strip (the working material strip or the spare material strip) that is unwound and output from the second unwinding assembly <NUM>.

It should be noted that, of course, in other embodiments, two clamping structures can be provided on the sliding bracket11 along the first direction, and the two clamping structures are equipped with the first fixing position <NUM> and the second fixing position <NUM>, respectively. In addition, each clamping structure is used to independently clamp or release one of the material strips unwound and output from the unwinding assembly (i.e., the working material strip or the spare material strip), and it can also clamp or release the working material strip and the spare material strip at a same time, which is not limited here.

Specifically, in the embodiment, the unwinding mechanism <NUM> further includes a first temporary storage assembly <NUM> and a second temporary storage assembly. The first temporary storage assembly <NUM> is mounted on the sliding bracket <NUM> and arranged between the first unwinding assembly <NUM> and the first fixing mechanism <NUM> for temporary storing the material strip a unwound and output from the first unwinding assembly <NUM>. The second temporary storage assembly is mounted on the sliding bracket <NUM> and arranged between the second unwinding assembly and the first fixing mechanism <NUM> for temporary storing the material strip unwound and output from the second unwinding assembly.

Referring to <FIG>, <FIG>, in the embodiment of the present application, the cutting mechanism <NUM> includes an adjusting assembly <NUM> and two cutting assemblies <NUM> mated and connected to the adjusting assembly <NUM>. Each cutting assembly <NUM> has a first cutter <NUM> and a second cutter <NUM> cooperated to the first cutter <NUM> for cutting. The adjusting assembly <NUM> is provided on the sliding bracket <NUM> and is capable of controllably driving the two cutting assemblies <NUM> to move away from each other along the first direction to respective cutting positions for cutting off the working material strip or the spare material strip.

When the two cutting assemblies <NUM> move to the respective cutting positions, the working material strip and the spare material strip located at the strip connection station c respectively enter between the first cutter <NUM> and the second cutter <NUM> of the corresponding cutting assemblies <NUM>, respectively, so that the first cutter <NUM> and the second cutter <NUM> of the two cutting assemblies <NUM> are cooperated for cutting, so as to cut off the working material strip and the spare material strip respectively.

In some embodiments, the cutting mechanism <NUM> further includes a moving assembly <NUM>, and the moving assembly <NUM> is provided on the sliding bracket <NUM> and is connected with the adjusting assembly <NUM> by transmission to controllably drive the adjusting assembly <NUM> to move along a fourth direction until both the cutting assemblies <NUM> are located between the working material strip and the spare material strip at the strip connection station c. Wherein the fourth direction intersects with the first direction. Preferably, the fourth direction is perpendicular to the first direction and parallel to the second direction described above.

In this way, when it is necessary to cut off the working material strip and the spare material strip located at the strip connection station c, firstly, the moving assembly <NUM> drives the adjusting assembly <NUM> to move along the fourth direction until the two cutting assemblies <NUM> are located between the working material strip and the spare material strip located at the strip connection station c, so that the working material strip and the spare material strip are aligned in the first direction with a position between the first cutter <NUM> and the second cutter <NUM> of the corresponding cutting assembly <NUM>, respectively. Then, the adjusting assembly <NUM> drives the two cutting assemblies <NUM> to move away from each other along the first direction to the cutting positions, so that the working material strip and the spare material strip enter between the first cutter <NUM> and the second cutter <NUM> of the corresponding cutting assembly <NUM>, respectively. Then, the first cutter <NUM> and the second cutter <NUM> of the two cutting assemblies <NUM> are cooperated for cutting to cut off the working material strip and the spare material strip, respectively. Finally, the adjusting assembly <NUM> drives the two cutting assemblies <NUM> to move close to each other along the first direction to return to their original positions, and the moving assembly <NUM> drives the adjusting assembly <NUM> to move reversely along the fourth direction to return to its original position, so as to prevent interference between the cutting mechanism <NUM> and other components during movement of the sliding bracket <NUM> along the first direction.

Specifically, in the embodiment, the moving assembly <NUM> includes a moving driving member <NUM> mounted to the sliding bracket <NUM> and a moving plate <NUM> drivingly connected with the moving driving member <NUM>. The adjusting assembly <NUM> is mounted to the moving plate <NUM>, and the moving driving member <NUM> is used to drive the moving plate <NUM> to move along the fourth direction, thereby driving the adjusting assembly <NUM> to move along the fourth direction. Optionally, the moving driving member <NUM> may be a cylinder.

Specifically, in the embodiment, each cutting assembly <NUM> further includes a mounting base <NUM> movably connected to the moving plate <NUM> along the first direction, and the first cutter <NUM> and the second cutter <NUM> are mounted to the mounting base <NUM>. The mounting bases <NUM> of the two cutting assemblies <NUM> are both drivingly connected with the adjusting assembly <NUM>, so as to be driven by the adjusting assembly <NUM> to approach or move away from each other along the first direction. When the adjusting assembly <NUM> drives the mounting bases <NUM> of the two cutting assemblies <NUM> to move away from each other, the working material strip and the spare material strip enter between the first cutter <NUM> and the second cutter <NUM> of the corresponding cutting assembly <NUM>, respectively, so as to be cut off by the first cutter <NUM> and the second cutter <NUM> of the corresponding cutting assembly <NUM>.

Further, the moving plate <NUM> is equipped with a first sliding rail <NUM>, and the mounting base <NUM> is mounted with a first sliding block <NUM>, and the first sliding block <NUM> is slidably cooperated with the first sliding rail <NUM>, so that the mounting base <NUM> is movable along the first direction relative to the moving plate <NUM> by sliding of the first sliding block <NUM> along the first sliding rail <NUM>, and to ensure that movement of the mounting base <NUM> along the first direction is more stable and reliable.

Further, the adjusting assembly <NUM> includes a gripper cylinder <NUM>, and two driving ends of the gripper cylinder <NUM> are respectively connected with the mounting bases <NUM> of the two cutting assemblies <NUM>, so that the gripper cylinder <NUM> can drive the mounting bases <NUM> of the two cutting assemblies <NUM> to approach or away from each other along the first direction.

Specifically, in the embodiment, each cutting assembly <NUM> further includes a guiding bar <NUM> and a cutting driving member <NUM>, and the mounting base <NUM> is defined with a guiding hole, and the guiding bar <NUM> is arranged through the guiding hole and is slidably cooperated with the guiding hole. The first cutter <NUM> is fixedly connected to the mounting base <NUM>, and the second cutter <NUM> is fixedly connected to one end of the guiding bar <NUM>. The cutting driving member <NUM> is mounted on the mounting base <NUM> and is connected with another end of the guiding bar <NUM> by transmission to drive the guiding bar <NUM> to move in the guiding hole, thereby driving the second cutter <NUM> to move relative to the first cutter <NUM>, thereby cutting the material strip (the working material strip or the spare material strip) between the second cutter <NUM> and the first cutter <NUM>. In this way, movement of the second cutter <NUM> is guided by the sliding cooperation between the guiding bar <NUM> and the guiding hole, so as to ensure that the second cutter <NUM> is cooperated with the first cutter <NUM> for cutting to cut off the material strip between the second cutter <NUM> and the first cutter <NUM> during a moving process. Optionally, the cutting driving member <NUM> may be a cylinder. The second cutter <NUM> is fixedly connected to one end of the guiding bar <NUM> through a cutter base <NUM>.

It should be noted that the cutting mechanism <NUM> is not limited to being mounted on the sliding bracket <NUM> and moving with the sliding bracket <NUM> along the first direction. In some other embodiments, the cutting mechanism <NUM> may also be provided with a separate driving structure (e.g., a linear module, an electric cylinder, etc.) to drive the cutting mechanism <NUM> to move along the first direction (specifically, the moving driving member <NUM> of the moving assembly <NUM> is mounted on the driving structure), to adjust positional relationship between the two cutting assemblies <NUM> and the working material strip and the spare material strip located at the strip connection station c, and to ensure that the two cutting assemblies <NUM> can move to the respective cutting positions for cutting under a driving action of the moving assembly <NUM> and the adjusting assembly <NUM>.

Referring to <FIG>, <FIG>, in the embodiment of the present application, the second fixing mechanism <NUM> includes a first fixing assembly <NUM>, a second fixing assembly <NUM>, and a third fixing assembly <NUM>, and the first fixing assembly <NUM> and the second fixing assembly <NUM> are located on both sides of the third fixing assembly <NUM> in the first direction, respectively. During the movement of the sliding bracket <NUM> along the first direction, the first fixing position <NUM> and the second fixing position <NUM> can be alternately aligned with the third fixing assembly <NUM>.

Wherein the second fixing position <NUM> is aligned with the second fixing assembly <NUM> when the first fixing position <NUM> is aligned with the third fixing assembly <NUM>, so that the second fixing assembly <NUM> fixedly connects a spare material strip passing through the second fixing position <NUM>. At this moment, the working material strip passing through the first fixing position <NUM> continues to pass through the strip connection station c and the third fixing assembly <NUM> and is conveyed downstream.

When the second fixing position <NUM> is aligned with the third fixing assembly <NUM>, the first fixing position <NUM> is aligned with the first fixing assembly <NUM> such that the first fixing assembly <NUM> fixedly connects a spare material strip passing through the first fixing assembly <NUM>. At this moment, the working material strip passing through the second fixing position <NUM> continues to pass through the strip connection station c and the third fixing assembly <NUM> and is conveyed downstream.

In this way, the first fixing assembly <NUM> or the second fixing assembly <NUM> is used to connect and fix the starting end of the spare material strip, so that the cutting assembly <NUM> can cut off the working material strip and the spare material strip at the strip connection station c at a same time, which is beneficial to improve a cutting effect. It can be understood that, the working material strip and the spare material strip are respectively cut off by the above-mentioned two cutting assemblies <NUM> of the cutting mechanism <NUM>.

Specifically, in the embodiment, a first position and a second position are provided in a process of the sliding bracket <NUM> moving along the first direction.

When the sliding bracket <NUM> moves to the first position, the first fixing position <NUM> is aligned with the first fixing assembly <NUM>, so that the spare material strip passing through the first fixing position <NUM> is fixedly connected to the first fixing assembly <NUM>. At a same time, the second fixing position <NUM> is aligned with the third fixing assembly <NUM>, so that the working material strip passing through the second fixing position <NUM> continues to pass through the strip connection station c and the third fixing assembly <NUM>, and is conveyed downstream.

When the sliding bracket <NUM> moves to the second position, the first fixing position <NUM> is aligned with the third fixing assembly <NUM>, so that the working material strip passing through the first fixing position <NUM> continues to pass through the strip connection station c and the third fixing assembly <NUM>, and is conveyed downstream. At a same time, the second fixing position <NUM> is aligned with the second fixing assembly <NUM>, so that the spare material strip passing through the second fixing position <NUM> is fixedly connected to the second fixing assembly <NUM>.

Specifically, in the embodiment, the first fixing assembly <NUM> includes a first bracket <NUM>, a first fixed clamping block <NUM>, and a first movable clamping block <NUM>. The first fixed clamping block <NUM> is fixedly connected to the first bracket <NUM>, and the first movable clamping block <NUM> is provided on the first bracket <NUM> and is configured to be able to approach or away from the first fixed clamping block <NUM>. When the first fixing position <NUM> is aligned with the first fixing assembly <NUM>, the spare material strip passing through the first fixing position <NUM> is inserted between the first fixed clamping block <NUM> and the first movable clamping block <NUM>. Then the first movable clamping block <NUM> moves to the first fixed clamping block <NUM> to tightly clamp the spare material strip between them, so as to realize clamping and fixing of the spare material strip, so that the cutting mechanism <NUM> can cut off the spare material strip when the roll is replaced. Optionally, the first movable clamping block <NUM> is mounted on the first bracket <NUM> through a first knob plunger <NUM>, so that the first movable clamping block <NUM> can be driven to approach or move away from the first fixed clamping block <NUM> by screwing the first knob plunger <NUM>.

It should be noted that, the first fixed assembly <NUM> can also use other structures, such as vacuum suction plates or gripper cylinders, as long as they can fix the starting end of the spare material strip passing through the first fixing position <NUM>, which is not limited here.

Specifically, in the embodiment, the second fixing assembly <NUM> includes a second bracket <NUM>, a second fixed clamping block <NUM>, and a second movable clamping block <NUM>. The second fixed clamping block <NUM> is fixedly connected to the second bracket <NUM>, and the second movable clamping block <NUM> is provided on the second bracket <NUM> and is configured to be able to approach or away from the second fixed clamping block <NUM>. When the second fixing position <NUM> is aligned with the second fixing assembly <NUM>, the spare material strip passing through the second fixing position <NUM> is inserted between the second fixed clamping block <NUM> and the second movable clamping block <NUM>. Then the second movable clamping block <NUM> moves to the second fixed clamping block <NUM> to tightly clamp the spare material strip between them, so as to realize clamping and fixing of the spare material strip, so that the cutting mechanism <NUM> can cut off the spare material strip when the roll is replaced. Optionally, the second movable clamping block <NUM> is mounted on the second bracket <NUM> through a second knob plunger <NUM>, so that the second movable clamping block <NUM> can be driven to approach or move away from the second fixed clamping block <NUM> by screwing the second knob plunger <NUM>.

It should be noted that, the second fixed assembly <NUM> can also use other structures, such as vacuum suction plates or gripper cylinders, as long as they can fix the starting end of the spare material strip passing through the second fixing position <NUM>, which is not limited here.

Specifically, in the embodiment, the third fixing assembly <NUM> includes a third bracket <NUM>, a gripping driving member <NUM>, and two gripping blocks <NUM>, and the gripping driving member <NUM> is mounted to the third bracket <NUM>. The two gripping blocks <NUM> are connected to the gripping driving member <NUM>, so as to be driven by the gripping driving member <NUM> to tightly clamp or release the working material strip between the two gripping blocks <NUM>. Optionally, the gripping driving member <NUM> may be a gripper cylinder. It should be noted that in other embodiments, the third fixing assembly can also use other structures, such as vacuum suction plates or the like, as long as they can fix the working material strip, which is not limited here.

Further, the second fixing mechanism <NUM> also includes a fixed frame <NUM>; the first bracket <NUM>, the second bracket <NUM>, and the third bracket <NUM> are all fixedly connected to the fixed frame <NUM>, so that the first fixed assembly <NUM>, the third fixed assembly <NUM>, and the second fixed assembly <NUM> are integrally mounted on the fixed frame <NUM> in order to improve the space utilization and facilitate disassembly and assembly.

Referring to <FIG> and <FIG>, in the embodiment of the present application, the strip connection mechanism <NUM> includes a tape sticking assembly, and the tape sticking assembly comprises a tape sticking driving member <NUM> and two tape sticking suction cups <NUM> drivingly connected to the tape sticking driving member <NUM>, and at least one of the two tape sticking suction cups <NUM> is used to suck up adhesive tapes. The tape sticking driving member <NUM> is used to drive the two tape sticking suction cups <NUM> to be in a closed state, so as to stick the adhesive tapes on the tape sticking suction cups <NUM> to the aligned cut-off end of the working material strip and the cut-off end of the spare material strip at the strip connection station c , so that connection of the spare material strip and the working material strip can be realized. In this way, the adhesive tape is stuck to the cut-off end of the working material strip and the cut-off end of the spare material strip between the two tape sticking suction cups <NUM> by closing of two tape sticking suction cups <NUM>, thus realizing connection between the working material strip and the spare material strip. A structure of the tape sticking assembly is simple, and adhesive action is simple and reliable, making adhesive efficiency higher and a better adhesive effect. It can be understood that when there is only one tape sticking suction cup <NUM> used to suck up the adhesive tape, another tape sticking suction cup <NUM> may not have an adsorption function (i.e., it does not need to be connected to an external negative pressure source, and may not open an adsorption hole connected to an external air source), but only serve to match and close the tape sticking suction cup <NUM> used to suck up the adhesive tape to ensure that the adhesive tape is stuck to a connection point between the working material strip and the spare material strip.

Specifically, in the embodiment, the strip connection mechanism <NUM> further includes a translation driving member <NUM> and a driving block <NUM>. The translation driving member <NUM> is drivingly connected with the driving block <NUM>. The tape sticking driving member <NUM> is mounted on the driving block <NUM>, and the translation driving member <NUM> is used to drive the driving block <NUM> to move between a tape spare position and a tape sticking position. When the driving block <NUM> moves to the tape spare position, the tape sticking suction cup <NUM> sucks up the adhesive tape. When the driving block <NUM> moves to the tape sticking position, the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to close together to be in a closed state, so as to stick the adhesive tape to the working material strip and the spare material strip. Optionally, the tape spare position and the tape sticking position are arranged along the second direction.

In this way, when the strips need to be connected, firstly, the translation driving member <NUM> drives the driving block <NUM> to move to the tape spare position, causing the tape sticking suction cup <NUM> to suck up the adhesive tape. Then, the translation driving member <NUM> drives the driving block <NUM> to move to the tape sticking position. At this time, the cut-off end of the working material strip and the cut-off end of the spare material strip aligned at the strip connection station c are located between the two tape sticking suction cups <NUM>. Then, the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to close together to squeeze the cut-off end of the working material strip and the cut-off end of the spare material strip, so as to stick the adhesive tape on the tape sticking suction cups <NUM> to the cut-off end of the working material strip and the cut-off end of the spare material strip, so that the cut-off end of the working material strip and the cut-off end of the spare material strip are connected to each other by the adhesive tape. Finally, the tape sticking driving member <NUM> drives the tape sticking suction cups <NUM> to open (at this time, the tape sticking suction cups <NUM> can be controlled to stop sucking up the adhesive tape so that the tape sticking suction cups <NUM> can be separated from the adhesive tape), and the translation driving member <NUM> drives the driving block <NUM> to return to the tape spare position to prepare for next adhesive sticking. Optionally, the translation driving member <NUM> may be a cylinder.

Further, the strip connection mechanism <NUM> also includes a tape spare plate <NUM> mounted on a fixing base <NUM>, and the tape spare plate <NUM> is located at the tape spare position, and at least one side surface is used for sticking the adhesive tape.

When the translation driving member <NUM> drives the driving block <NUM> to move to the tape spare position, the tape spare plate <NUM> is located between the two tape sticking suction cups <NUM>. At this time, the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to close together, so that the tape sticking suction cups <NUM> suck up the adhesive tape on the tape spare plate <NUM>. Then the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to open (at this time, the adhesive tape on the tape spare plate <NUM> has been sucked up by the tape sticking suction cups <NUM>, so that the adhesive tape is separated from the tape spare plate <NUM>). After the adhesive tape on the tape spare plate <NUM> is sucked away by the tape sticking suction cups <NUM>, a new adhesive tape can be re-stuck on at least one side of the tape spare plate <NUM> by manual or an automatic apparatus for the tape sticking suction cups <NUM> to suck again.

It should be noted that, in order to improve a strip connection effect, the two tape sticking suction cups <NUM> both need to suck up the adhesive tape, so that the adhesive tape is stuck on both sides of the cut-off end of the working material strip and the cut-off end of the spare material strip. Therefore, adhesive tapes need to be stuck on opposite sides of the tape spare plate <NUM> so that the two tape sticking suction cups <NUM> can suck up the adhesive tapes at a same time.

In the embodiment of the present application, the tape sticking driving member <NUM> is used to drive the two tape sticking suction cups <NUM> to rotate in opposite directions to each other to the above-mentioned closed state and a flat state. In this way, when the translation driving member <NUM> drives the driving block <NUM> to move to the tape spare position or the tape sticking position, the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to rotate in opposite directions to each other to the closed state, so that the two tape sticking suction cups are closed, thereby realizing the sucking up or sticking of the adhesive tape. When the sucking up of the adhesive tapes is completed and it is necessary to move to the tape sticking position, or the sticking of the adhesive tapes is completed and it is necessary to move to the tape spare position, in order to prevent interference of the two tape sticking suction cups <NUM> during the movement, the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to rotate in opposite directions to each other to the flat state, ensuring that the two tape sticking suction cups <NUM> will not interfere with other parts such as the material strip or the tape spare plate <NUM> during the movement process. It can be understood that the two tape sticking suction cups <NUM> can be in the closed state by turning approximately <NUM>° from the flat state to a direction in which they are close to each other. Similarly, the two tape sticking suction cups <NUM> can be in the flat state by turning approximately <NUM>° from the closed state to a direction in which they are apart from each other. When the two tape sticking suction cups <NUM> are in the flat state, the two tape sticking suction cups <NUM> are in a same plane to ensure a position avoidance effect. Optionally, the tape sticking driving member <NUM> may be a gripper cylinder.

It should be noted that the two tape sticking suction cups <NUM> are not limited to be closed or opened by rotating in opposite directions to each other to achieve sucking up or sticking of the adhesive tape. In other embodiments, the two tape sticking suction cups <NUM> may also be used in a translational manner to close or open to achieve sucking up or sticking of the adhesive tape, which is not limited here. Of course, when the two tape sticking suction cups <NUM> are closed or opened in the translational manner, an additional avoidance driving cylinder is required. After the two tape sticking suction cups <NUM> suck up the adhesive tape or stick the adhesive tape, it is necessary to use the avoidance driving cylinder to drive the two tape sticking suction cups <NUM> to move (for example, move along the first direction), so that the tape spare plate <NUM> or the spare material strip and the working material strip exit from a position between the two tape sticking suction cups <NUM> to achieve the effect of avoidance. It should be noted that, as for driving the two tape sticking suction cups <NUM> to translate and using the avoidance driving cylinder to drive the two tape sticking suction cups <NUM> to avoid, a relatively mature prior art can be used, which will not be repeated here.

In the embodiment of the present application, the strip connection mechanism <NUM> further includes a strip connection base <NUM> on which the translation driving member <NUM> is fixedly mounted, and the tape spare plate <NUM> is fixedly connected to the strip connection base <NUM> through a tape spare bracket <NUM>. In this way, the strip connection mechanism <NUM> is integrally mounted on the strip connection base <NUM>, which is beneficial to improve the space utilization and facilitate disassembly and assembly.

Specifically, in the embodiment, the roll replacing device further comprises the fixing base <NUM> (see <FIG>) and a base plate <NUM> (see <FIG>); both the strip connection base <NUM> and the fixing frame <NUM> are fixedly mounted on the fixing base <NUM>, and a base <NUM> and the fixing base <NUM> are both fixedly mounted on the base plate <NUM>, so that the unwinding mechanism <NUM> of the roll replacing device, the first fixed mechanism <NUM> of the roll replacing device, the second fixed mechanism <NUM> of the roll replacing device, the cutting mechanism <NUM> of the roll replacing device, and the strip connection mechanism <NUM> of the roll replacing device are integrated on the base plate <NUM>, which makes the roll replacing device well integrated into a tab welding apparatus and helps improve an overall space utilization of the apparatus.

The following takes a case where the material strip a unwound and output from the first unwinding assembly <NUM> is used as the working material strip, and the material strip b unwound and output from the second unwinding assembly is used as the spare material strip (that is, the sliding bracket <NUM> is located in the second position) as an example to describe the roll replacing process:.

Initially, the sliding bracket <NUM> is in the second position, and the working material strip unwound and output from the first unwinding assembly <NUM> passes through the first fixing position <NUM> between the two clamping blocks <NUM> into the strip connection station c, and further passes through the two gripping blocks <NUM> of the third fixing assembly <NUM>, and continues to be conveyed downstream. The starting end of the spare material strip unwound and output from the second unwinding assembly passes through the second fixing position <NUM> between the two clamping blocks <NUM> into the strip connection station c and is tightly clamped and fixed between the second movable clamping block <NUM> of the second fixing assembly <NUM> and the second fixed clamping block <NUM> of the second fixing assembly <NUM>.

When a material roll on the first unwinding assembly <NUM> is used up and needs to be replaced, firstly, the two clamping blocks <NUM> of the first fixing mechanism <NUM> tightly clamp the working material strip unwound and output from the first unwinding assembly <NUM> and the spare material strip unwound and output from the second unwinding assembly (that is, the working material strip is tightly clamped and fixed at the first fixing position <NUM>, and the spare material strip is tightly clamped and fixed at the second fixing position <NUM>). In addition, the two gripping blocks <NUM> of the third fixing assembly <NUM> also tightly clamp and fix the working material strip. The cutting mechanism <NUM> cuts off the working material strip between the first fixing position <NUM> and the third fixing assembly <NUM> and the spare material strip between the second fixing position <NUM> and the second fixing assembly <NUM>.

Then, the sliding bracket <NUM> moves to the first position along the first direction, so that the second fixing position <NUM> is aligned with the third fixing assembly <NUM>, so the cut-off end of the spare material strip tightly clamped at the second fixing position <NUM> is aligned with the cut-off end of the working material strip tightly clamped between the two gripping blocks <NUM> of the third fixing assembly <NUM>. The translation driving member <NUM> of the strip connection mechanism <NUM> drives the driving block <NUM> to move to the tape sticking position, and the tape sticking driving member <NUM> drives the two tape sticking suction cups <NUM> to be in a closed state, in order to connect the cut-off end of the spare material strip tightly clamped and fixed at the second fixing position <NUM> with the cut-off end of the working material strip tightly clamped and fixed between the two gripping blocks <NUM> of the third fixing assembly <NUM>, i.e., to achieve the strip connection.

Finally, the two clamping blocks <NUM> of the first fixing mechanism <NUM> release the clamping of the working material strip unwound and output from the first unwinding assembly <NUM> and the spare material strip unwound and output from the second unwinding assembly, and the two gripping blocks <NUM> of the third fixing assembly <NUM> also release the clamping of the working material strip, so that the spare material strip unwound and output from the second unwinding assembly passes through the second fixing position <NUM>, the strip connection station c, and the two gripping blocks <NUM> of the third fixing assembly <NUM> successively, and is conveyed downstream as the working material strip, that is, the roll replacing is completed.

At this time, a used-up material roll on the first unwinding assembly <NUM> can be replaced, and a material strip output from a replaced new material roll can be used as the spare material strip, and starting end of the spare material strip passes through the first fixing position <NUM> and is tightly clamped and fixed to the first fixing assembly <NUM> to prepare for the next roll replacing.

It should be noted that in a case where the material strip a unwound and output from the first unwinding assembly <NUM> serves as the spare material strip, and the material strip b unwound and output from the second unwinding assembly serves as the working material strip, the roll replacing process is similar to the above roll replacing process, so it will not be repeated here.

Based on the above roll replacing device, the present application also provides a tab welding apparatus for cutting off a working material strip to form a tab, and welding the tab on a plate. The tab welding apparatus includes a roll replacing device as described in any of the above embodiments for conveying the working material strip downstream. It can be understood that the working material strip is a tab material strip.

Specifically, the tab welding apparatus further includes a welding device, which is arranged downstream of the roll replacing device, for cutting off the working material strip conveyed by the roll replacing device to form a tab and welding the tab to the plate.

The technical features of the above-described embodiments can be combined in any number of ways. For the sake of brevity, not all possible combinations of the technical features of the above-described embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, such technical features should be considered the scope of this specification.

Claim 1:
A roll replacing device, comprising:
an unwinding mechanism (<NUM>) comprising a sliding bracket (<NUM>) and an unwinding assembly; the sliding bracket (<NUM>) is configured to controllably move along a first direction, and the unwinding assembly is used for outputting a working material strip and a spare material strip;
a cutting mechanism (<NUM>) used for cutting off the working material strip and the spare material strip; and
a strip connection mechanism (<NUM>);
characterized in that:
the unwinding assembly is mounted on the sliding bracket (<NUM>);
the roll replacing device further comprises:
a first fixing mechanism (<NUM>) provided on the sliding bracket (<NUM>) and located downstream of the unwinding assembly, capable of controllably fixing the working material strip and the spare material strip output from the unwinding assembly;
a second fixing mechanism (<NUM>) arranged downstream of the first fixing mechanism (<NUM>) to form a strip connection station (c) between the first fixing mechanism (<NUM>) and the second fixing mechanism (<NUM>), the second fixing mechanism (<NUM>) capable of controllably fixing the working material strip and the spare material strip passing through the first fixing mechanism (<NUM>); wherein the working material strip and the spare material strip located between the first fixing mechanism (<NUM>) and the second fixing mechanism (<NUM>) are arranged at intervals along the first direction of the sliding bracket;
wherein the cutting mechanism (<NUM>) is used for cutting off the working material strip and the spare material strip at the strip connection station (c); and
the strip connection mechanism (<NUM>) is arranged corresponding to the strip connection station (c);
the first fixing mechanism (<NUM>) is capable of following the sliding bracket (<NUM>) to move along the first direction of the sliding bracket until the spare material strip fixed by the first fixing mechanism (<NUM>) and the working material strip fixed by the second fixing mechanism (<NUM>) are aligned at the strip connection station (c), and allows the strip connection mechanism (<NUM>) to connect the working material strip and the spare material strip which are aligned at the strip connection station (c).