Patent Description:
The ultrasonic metal welding machine is generally consisted of a framework, an ultrasonic generator and an ultrasonic triplet. The ultrasonic triplet includes a transducer, an amplitude modulator and a welding head. During metal welding, the framework drives the welding head to move to the workpiece to be welded. The ultrasonic triplet converts the electric energy generated by the ultrasonic generator with a certain frequency into the mechanical energy of the same frequency and outputs it through the welding head. High-frequency mechanical vibration is transferred from the welding head to the surface of the workpiece, which causes the friction of the surface of the workpiece to form fusion between the molecular layers, so as to weld the workpiece. Compared with the traditional welding process, ultrasonic welding has the characteristics of fast welding speed, high welding strength, good sealing, low cost, clean and pollution-free, so it is widely used.

At present, when the welding head of the existing ultrasonic metal welding machine is replaced, due to the structural characteristics of the ultrasonic triplet that the overall length is long and the weight is large, the connection and positioning with the framework, as well as the operation space after matching with automatic production line being limited, it is necessary to fix the welding head through a welding head holding device in advance, and then fix the welding head holding device on the framework through multiple bolts to realize the replacement of the welding head.

For the above relevant technologies, due to the heavy weight of the ultrasonic triplet and the welding head holding device, two workers are required to cooperate with each other to disassemble/assemble the welding head, one of the two workers holds the ultrasonic triplet and the other disassembles/assembles it. During the disassembly/assembly process, a force is required to support the ultrasonic triplet. When the disassembly/assembly is performed by a single worker, it is not easy to hold the ultrasonic triplet and thus there is a safety risk of falling of the ultrasonic triplet and the welding head holding device. The inventor believes that there is a defect that it is time-consuming, laborious and not easy to operate for the worker to disassemble/assemble the welding head. In <CIT> (describing the preamble of claim <NUM>), a triple-group mounting seat fixing device of an ultrasonic welding machine is described. The triplet group mounting seat fixing device comprises a welding machine body and a triplet group mounting seat, the welding machine body is provided with a guide groove extending along the linear direction, the end face of the guide groove is provided with an opening, and the triplet group mounting seat is inserted into the guide groove from the opening. A guide groove is formed in the middle of the three-group mounting base, a guide arm extending towards the direction of the three-group mounting base is arranged on the groove wall of the guide groove, convex blocks are arranged on the two sides of the three-group mounting base, a side face pressing block is arranged in the guide groove, and an operation piece used for pushing the side face pressing block to press the three-group mounting base is arranged on the guide groove.

In order to solve the problem that it is time-consuming, laborious and not easy to operate for the worker to disassemble/assemble the welding head, this invention defines a quick-replace device for the welding head of the ultrasonic metal welding machine according to independent claim <NUM>.

This application provides a quick-replace device for the welding head of the ultrasonic metal welding machine, which adopts a technical solution as follows:.

A quick-replace device for the welding head of the ultrasonic metal welding machine includes a fixing mechanism for fixedly connecting a framework and a movable mechanism for fixing an ultrasonic triplet including a transducer, an amplitude modulator and a welding head, the movable mechanism being detachably mounted in the fixing mechanism, and including a mounting plate and a connecting assembly for fixing the ultrasonic triplet, the connecting assembly being arranged on the mounting plate; the fixing mechanism including a fixing block for a fixed
connection to the framework, a mounting groove being defined in the fixing block with at least one side thereof being open and extending in use in a direction perpendicular to the framework, the mounting plate being slidably mounted in the mounting groove, and an abutting block for fixing the mounting plate being mounted in the fixing block. A positioning block is detachably mounted on the fixing block in a direction perpendicular to the sliding direction of the mounting plate and abuts against the mounting plate in a direction perpendicular to the adjusting direction of the abutting block.

By adopting the above technical solution, during assembly of the welding head, firstly the ultrasonic triplet is mounted to the connecting assembly, and then the mounting plate slides into the mounting groove of the fixing block via its open side. At this time, the mounting groove of the fixing block supports the mounting plate, and the assembly of the welding head is then completed by using the abutting block to fix the mounting plate. During disassembly of the welding head, firstly the abutting block is adjusted to release the fixed state with the mounting plate. At this time, the mounting groove of the fixing block supports the mounting plate, and the
ultrasonic triplet is not easy to fall. Then the mounting plate slides out of the mounting groove to complete the disassembly of the welding head. In this way, by means of providing support to the mounting plate through the mounting groove, a single worker can replace the welding head, and is not easy to occur the safety risk of falling of the ultrasonic triplet. The welding head holding device is consisted of two parts, i.e., the fixing mechanism and the movable mechanism. During replacement of the welding head, only the movable mechanism needs to be disassembled and assembled, which reduces the overall weight of the parts that need to be replaced, so that replacement of the welding head is time-saving and labor-saving, and the operation is more convenient and fast.

In some embodiments, two sides of the mounting plate along its sliding direction are provided with two position limiting bars, a first limiting groove communicating with the mounting groove is defined in the fixing block, a chamfer is formed at an end of the abutting block close to the mounting plate and cooperates with a bottom of the mounting groove to form a second limiting groove, and the two position limiting bars are slidably mounted in the first limiting groove and second limiting groove along the sliding direction of the mounting plate, respectively.

By adopting the above technical solution, during assembly of the mounting plate, the mounting plate is slidably mounted into the mounting groove. In this time, the position limiting bars at two sides of the mounting plate are in the first limiting groove and second limiting groove, respectively. The cooperation of the position limiting bars with the first and second limiting grooves on the one hand realizes the support of the mounting groove to the mounting plate, and on the other hand realizes the guiding function to the mounting plate, facilitating the sliding installation of the mounting plate.

In some embodiments, an end of the abutting block away from the mounting plate is provided with an adjusting member for adjusting a position of the abutting block, and the fixing the adjusting member is provided with a fastener for fixing itself.

By adopting the above technical solution, the adjusting member is used to adjust the position of the abutting block, so that the abutting block slides in the fixing block to make the chamfer of the abutting block abut against the position limiting bar of the mounting plate, thereby fixing the mounting plate. The fasteners are used to fix the adjusting member after adjustment of the abutting block, the abutting block thus can fix the mounting plate more firmly.

In some embodiments, a guiding groove is defined in the fixing block, a guiding block is provided on the abutting block, and the guide block matches with the guiding groove and is slidably mounted in the guiding groove along an adjusting direction of the abutting block.

By adopting the above technical solution, during the sliding of the abutting block to fix the mounting plate, the guiding block on the abutting block slides in the guiding groove to guide and limit the sliding direction of the abutting block, making the sliding of the abutting block more stable.

According to the invention, a positioning block is detachably mounted on the fixing block and abuts against the mounting plate in a direction perpendicular to the adjusting direction of the abutting block.

By adopting the above technical solution, the positioning block is mounted on the fixing block after the mounting plate is assembled. The positioning block is pressed against the mounting plate and cooperates with the framework to limit the sliding direction of the mounting plate, so as to further fix the mounting plate. Similarly, during removing the mounting plate, the positioning block needs to be removed firstly.

In some embodiments, the connecting assembly includes a clamping jaw for fixing the welding head and a clamping member for fixing the amplitude modulator, and the clamping member is mounted on the mounting plate and adjustable along an axis direction of the ultrasonic triplet.

By adopting the above technical solution, it is necessary to pre-assemble the ultrasonic triplet to the connecting assembly when the welding head is assembled. The clamping claw is used to clamp and fix the welding head, and the clamping member is used to clamp and fix the amplitude modulator to complete the assembly of the ultrasonic triplet. The clamping member can be adjusted to make the connecting assembly suitable for ultrasonic triplets of different sizes and specifications.

In some embodiments, the clamping member includes a connecting rod and a hose clamp, the connecting rod is slidably mounted on the mounting plate along the axis direction of the ultrasonic triplet, the hose clamp is mounted at an end of the connecting rod away from the mounting plate for fixing the amplitude modulator, and a fixture for fixing the connecting rod is mounted on the mounting plate.

By adopting the above technical solution, during adjusting the clamping member, the connecting rod slides to drive the hose clamp to slide. When the hose clamp slides to a position where the amplitude modulator is placed, fixtures are used to fix the connecting rod, and the hose clamp is used to clamp and fix the amplitude modulator. For the sliding of the connecting rod, the adjustment of the clamping member is more convenient and fast.

In some embodiments, a position limiting groove is defined in the mounting plate along a sliding direction of the connecting rod, and the connecting rod matched with and is slidably mounted in the position limiting groove.

By adopting the above technical solution, the connecting rod slides in the position limiting groove of the mounting plate, which generates a position limit effect to the connecting rod and makes the sliding of the connecting rod more stable.

In some embodiments, a position plate for facilitating positioning of the welding head during assembly of the welding head is provided on the mounting plate.

By adopting the above technical solution, during assembly of the welding head, the position plate is arranged on the mounting plate for positioning the welding head, which makes the position of the welding head during assembly more accurate.

In some embodiments, a position limiting slot is defined in a side wall of the mounting plate close to the position plate, and a position limiting bar is provided on a side wall of the position plate close to the mounting plate, and the position limiting bar matches with and is engaged in the position limiting slot.

By adopting the above technical solution, during assembly of the position plate, the position limiting bar engages into the position limiting slot to limit the position of the position plate, which makes the position plate more stable. At the same time, the welding head engages into the position limiting slot to position the welding head quickly, thereby the welding head being perpendicular to the mounting head, improving the stability of the welding head during the welding process.

In summary, the embodiments of this application has at least one of the following beneficial effects:.

In order to solve the problem that it is time-consuming, laborious and not easy to operate for assembly/disassembling the welding head, the invention further defines a quick-replace method for welding head of ultrasonic metal welding machine according to independent claim <NUM>, which is implemented by the above quick-replace device for welding head of ultrasonic metal welding machine, wherein the method includes the following steps:.

Further, the method includes the steps of providing a positioning block and connecting the positioning block to the open side of the mounting groove of the fixing block after step S13, so as to limit the movement of the mounting plate along the fourth direction; and removing the positioning block which is connected to the open side of the mounting groove of the fixing block before step S01.

By adopting the above technical solution, during assembly of the welding head, firstly the ultrasonic triplet is mounted to the mounting plate, and then the mounting plate slides into the mounting groove of the fixing block via its open side. At this time, the mounting groove of the fixing block supports the mounting plate, and the assembly of the welding head is then completed by using the abutting block to fix the mounting plate. The whole assembly process can be completed by a single works, and the safety risk of falling of the ultrasonic triplet can be avoided.

In some embodiments, the method further includes disassembling a welding head to be replaced before step S11, which includes the following steps:.

By adopting the above technical solution, during disassembly of the welding head, firstly the abutting block is adjusted to release the fixed state with the mounting plate. At this time, the mounting groove of the fixing block supports the mounting plate, and the ultrasonic triplet is not prone to the safety risk of falling, and then the mounting plate slides out of the mounting groove to complete the disassembly of the welding head. The whole disassembly process can be completed by a single worker, and the safety risk of falling of the ultrasonic triplet can be avoided.

According to the invention, the method further includes: providing a positioning block and connecting the positioning block to the open side of the mounting groove of the fixing block after step S13, so as to limit the movement of the mounting plate along the fourth direction; and removing the positioning block which is connected to the open side of the mounting groove of the fixing block before step S01.

By adopting the above technical solution, the positioning block is mounted onto the fixing block to limit the sliding of the mounting plate after the assembly of the mounting plate is finished, so as to further fix the mounting plate. Similarly, during disassembly of the mounting plate, it is necessary to remove the positioning block firstly.

In some embodiments, the step S11 includes: providing a position plate with a latching slot and connecting the position plate to the mounting plate detachably; docking the welding head to be assembled with the latching slot for positioning, so that the welding head is perpendicular to the mounting plate; clamping the welding head through the connecting assembly and moving relative to the mounting plate until the connecting assembly contacts with the position plate; fixing the connecting assembly to the mounting plate; and removing the position plate from the mounting plate.

By adopting the above technical solution, during assembly of the welding head, the position plate is mounted onto the mounting plate for positing the welding head, making the positioning of the welding head more convenient and accurate during installation.

In some embodiments, the first direction and the second direction are perpendicular to each other, and contact surfaces of the abutting block and the mounting plate are inclined to a certain angle with respect to the first direction and the second direction.

By adopting the above technical solution, during assembly of the welding head, the sliding direction of the mounting plate is different from the sliding direction of the abutting block, and the mounting plate and abutting block can be positioned by the inclined contact surfaces, thereby the mounting plate being better fixed in the mounting groove.

Detailed description to the present application will be given below with reference to <FIG>.

Embodiments of the present application disclose a quick-replace device for welding head of ultrasonic metal welding machine.

Referring to <FIG>, the quick-replace device for welding head of ultrasonic metal welding machine includes a fixing mechanism <NUM> and a movable mechanism <NUM>. The fixing mechanism <NUM> is fixed to a side wall of a framework <NUM> through a connecting plate <NUM>, and the fixing mechanism <NUM> is integrally formed with the connecting plate <NUM>. The movable mechanism <NUM> is used to fix the ultrasonic triplet, which includes a transducer <NUM>, an amplitude modulator <NUM> and a welding head <NUM>. The movable mechanism <NUM> is detachably mounted in the fixing mechanism <NUM>. During replacing the welding head <NUM>, the welding head <NUM> can be removed when the movable mechanism <NUM> is detached from the fixing mechanism <NUM>, and the welding head <NUM> is installed when the movable mechanism <NUM> is mounted in the fixing mechanism <NUM>. The welding head holding device is consisted of two separate parts, i.e., the fixing mechanism <NUM> and the movable mechanism <NUM>, only the movable mechanism <NUM> needs to be disassembled and assembled for replacing the welding head <NUM>, which reduces the overall weight of the part to be replaced and makes the replacement of the welding head <NUM> more labor-saving.

Referring to <FIG>, the fixing mechanism <NUM> includes a fixing block <NUM>, which is fixedly mounted onto the side wall of the framework <NUM>. The fixing block <NUM> defines a mounting groove <NUM> which extends along a direction perpendicular to the framework <NUM>. Both ends of the mounting groove <NUM> are open, and one of the open ends of the mounting groove <NUM> close to the framework <NUM> abuts against the framework <NUM>. The movable mechanism <NUM> includes a mounting plate <NUM> and a connecting assembly <NUM>. The mounting plate <NUM> is slidably mounted into the mounting groove <NUM> along the direction perpendicular to framework <NUM>. The connecting assembly <NUM> is used to fix the ultrasonic triplet, and is fixedly mounted at an end of the mounting plate <NUM> away from the fixing block <NUM>. An abutting block <NUM> is slidably mounted into the fixing block <NUM> along a direction perpendicular to the sliding direction of the mounting plate <NUM>, and abuts against the mounting plate <NUM>. A positioning block <NUM> which is generally C-shaped is detachably mounted to a side wall of the fixing block <NUM> away from the framework <NUM> by bolts. One end face of the positioning block <NUM> abuts against the fixing block <NUM>, and the other end face of the positioning block <NUM> abuts against the mounting plate <NUM>. By means of sliding the mounting plate <NUM> into the mounting groove <NUM> of the fixing block <NUM>, the movable mechanism <NUM> is mounted into the fixing mechanism <NUM>. After the assembly of the mounting plate <NUM>, the abutting block <NUM> cooperates with the mounting groove <NUM> to fix the mounting plate <NUM> in a direction perpendicular to the sliding direction of the mounting plate <NUM>, and the positioning block <NUM> cooperates with the framework <NUM> to fix the mounting plate <NUM> in the sliding direction of the mounting plate <NUM>.

Referring to <FIG> and <FIG>, an adjusting member <NUM> is screwed in the fixing block <NUM>. The adjusting member <NUM> extends through the fixing block <NUM> and then threaded into the abutting block <NUM>. A fastener <NUM> is mounted around and screwed on the adjusting member <NUM>, and abuts against an outer sidewall of the fixing block <NUM>. In this application, the adjusting member <NUM> may be a differential screw, and the fastener <NUM> may be a nut. Two guiding grooves <NUM> are defined in the fixing block <NUM> along the sliding direction of the block <NUM>, two guiding blocks <NUM> are fixedly mounted to a side wall of the block <NUM> close to the guide grooves <NUM> by bolts, and the guiding blocks <NUM> are slidably engaged into the guide grooves <NUM> along the sliding direction of the abutting block <NUM>. During fixing the mounting plate <NUM>, the adjusting member <NUM> is rotated to drive the abutting block <NUM> to move. The guiding blocks <NUM> cooperate with the guide grooves <NUM> to make the movement of the abutting block <NUM> more stable. When the abutting block <NUM> moves to abut against the mounting plate <NUM>, the fastener <NUM> is rotated to fix the adjusting member <NUM> to make the abutting block <NUM> be fixed more stable.

Referring to <FIG> and <FIG>, two side walls of the mounting plate <NUM> are respectively provided with a position limiting bar <NUM> at an end thereof close to the fixing block <NUM>. The position limiting bar <NUM> is fixed to the sidewall, and extends along the sliding direction of the mounting plate <NUM>. A cross section of the position limiting bar <NUM> is generally triangular-shaped, and a width of the cross section gradually increases from bottom to top. A first limiting groove <NUM> is defined in an end of the fixing block <NUM> away from the abutting block <NUM>, and communicates with the mounting groove <NUM>. A chamfer <NUM> is formed on the abutting block <NUM>, which cooperates with a bottom wall of the mounting groove <NUM> to form a second limiting groove <NUM>. Cross sections of the first limiting groove <NUM> and second limiting groove <NUM> are the same as the cross section of the position limiting bar <NUM>, and an adjustment range of the abutting block <NUM> is less than the maximum width of the cross section of the position limiting bar <NUM>. The two position limiting bars <NUM> are slidably mounted into the first limiting groove <NUM> and second limiting groove <NUM> along the sliding direction of the mounting plate <NUM>, respectively. When the welding head <NUM> needs to be detached, firstly the positioning block <NUM> is detached, and then the adjusting member <NUM> is rotated to release the fixed state between the abutting block <NUM> and mounting plate <NUM>. At this time, the mounting plate <NUM> is snapped in the first limiting groove <NUM> and second limiting groove <NUM> of the mounting groove <NUM> through the position limiting bars <NUM>. The mounting groove <NUM> provides a support to the mounting plate <NUM>, which makes the mounting plate <NUM> not easy to have a safety risk of falling of the ultrasonic triplet during the disassembly of the welding head <NUM> by the workers, and thus a single worker can disassemble the welding head <NUM> by himself. The steps of assembly of the welding head <NUM> are opposite to the above steps, and a single worker can also assemble the welding head <NUM> by himself. Therefore, the replacement of the welding head <NUM> is time-saving and labor-saving, and is more convenient and fast.

Referring to <FIG>, the connection assembly <NUM> includes two clamping jaws <NUM> and a clamping member <NUM>, wherein the clamping jaws <NUM> are used to fixedly clamp the welding head <NUM>, and the clamping member <NUM> is used to fixedly clamp the amplitude modulator <NUM>. Four sliding grooves <NUM> are defined in the mounting plate <NUM> and extend along the axial direction of the ultrasonic triplet. The two clamping jaws <NUM> are fixed to a side wall of the mounting plate <NUM> away from the fixing block <NUM> by bolts. The bolts are slidably mounted in the sliding grooves <NUM>, and the two clamping jaws <NUM> are provided with threaded holes. When the clamping jaws <NUM> clamp the welding head <NUM>, the bolts extend through the threaded holes to fix the welding head <NUM>.

The clamping member <NUM> is mounted to a side wall of the mounting plate <NUM>, and is capable of being adjusted along the axis direction of the ultrasonic triplet. The clamping member <NUM> includes a connecting rod <NUM> and a hose clamp <NUM>. A position limiting groove <NUM> is defined in the mounting plate <NUM>, and the connecting rod <NUM> slides into the position limiting groove <NUM> of the mounting plate <NUM> along the axis direction of the ultrasonic triplet. The hose clamp <NUM> is fixed to an end of the connecting rod <NUM> away from the mounting plate <NUM> by bolts, and is perpendicular to the connecting rod <NUM> for fixing the amplitude modulator <NUM>. By the means of sliding the connecting rod <NUM> in the position limiting groove <NUM> to drive the hose clamp <NUM> to move, the movable mechanism <NUM> is suitable for ultrasonic triplets of different sizes.

A plurality of second mounting holes <NUM> are defined in the connecting rod <NUM> and evenly spaced from each other along the sliding direction of the connecting rod <NUM>. Three first mounting holes <NUM> are defined in the mounting plate <NUM> and evenly spaced from each other, and communicate with the position limiting groove <NUM>. A fixture <NUM> is screwed in the first mounting hole <NUM> of the mounting plate <NUM>. The fixture <NUM> extends through the first mounting hole <NUM> and then threads in the second mounting hole <NUM>. Two fixtures <NUM> are provided and mounted in the first mounting holes <NUM> at two ends of the connecting rod <NUM> in the sliding direction of the connecting rod <NUM>, respectively. In this application, the fixtures <NUM> may be bolts. After the connecting rod <NUM> slides to adjust positions, it is fixed by the fixtures <NUM>. By means of the two fixtures <NUM> which are arranged at two ends of the connecting rod <NUM> in the sliding direction, the fixing effect of the fixtures <NUM> is improved.

Referring to <FIG>, a position plate <NUM> is detachably connected to a side wall of the mounting plate <NUM> far away from the fixing block <NUM> by bolts and located between the two clamping jaws <NUM>. A width of the position plate <NUM> is about one half of that of the mounting plate <NUM>, and a latching slot <NUM> is defined in a side wall of the position plate <NUM> which is close to a middle of the mounting plate <NUM> in the width direction. The welding head <NUM> abuts a side wall of the mounting plate <NUM> close to the position plate <NUM> and is engaged in the latching slot <NUM>. A position limiting slot <NUM> is defined in a side wall of the mounting plate <NUM> close to the position plate <NUM> and extends along the width direction of the mounting plate <NUM>. A position limiting bar <NUM> is provided on a side wall of the position plate <NUM> close to the mounting plate <NUM> and extends along the width direction of the position plate <NUM>. The position limiting bar <NUM> is slidably engaged into the position limiting slot <NUM>. During assembly of the welding head <NUM>, firstly the position plate <NUM> is fix to the mounting plate <NUM> by bolts, and then the welding head <NUM> is engaged into the latching slot <NUM>, so as to quickly position the welding head <NUM> to make it be perpendicular to the mounting plate <NUM>. The clamping jaws <NUM> clamp the welding head <NUM> and slide towards the position plate <NUM>. When the clamping jaws <NUM> abut a side wall of the position plate <NUM>, the bolts are rotated to fix the clamping jaws <NUM>, and at the same time, the welding head <NUM> in the clamping jaw <NUM> is fixed by the bolts. After the welding head <NUM> is assembled, the position plate <NUM> is removed. By means of using the position plate <NUM> to pre-position the welding head <NUM>, the positioning of the welding head <NUM> is more convenient and accurate during installation. At the same time, using the position plate <NUM> enables the workers with different work experience to assemble the welding head <NUM> accurately, thereby reducing the assembly difficulty of the welding head <NUM>.

The implementation principle of the first embodiment is as follows: during assembly of the welding head <NUM>, firstly the welding head <NUM> is mounted in the clamping jaw <NUM>, and then the amplitude modulator <NUM> is mounted in the holding clamp <NUM>, thereby finishing pre-assembly of the ultrasonic triplet. The position plate <NUM> is then mounted to the mounting plate <NUM> to further fix the welding head <NUM>, and the mounting plate <NUM> is slidably mounted into the mounting groove <NUM> of the fixing block <NUM>, so that the position limiting bar <NUM> slides into the first limiting groove <NUM> and second limiting groove <NUM>. The adjusting member <NUM> is then rotated to drive the abutting block <NUM> to move, so as to fix the mounting plate <NUM>. The fastener <NUM> is then rotated to fix the adjusting member <NUM>, and finally the positioning block <NUM> is mounted on the fixing block <NUM> by bolts to complete the assembly of the welding head <NUM>. Similarly, the welding head <NUM> can be disassembled by reverse operation according to the above steps. During disassembling the welding head <NUM>, the mounting groove <NUM> provides a support to the mounting plate <NUM> through the cooperation of the first limit guide groove <NUM> and second limit guide groove <NUM> with the position limiting bar <NUM>, and thus a single worker can replace the welding head <NUM>, and the safety risk of falling of the ultrasonic triplet is not easy to occur, which makes the replacement of the welding head <NUM> time-saving and labor-saving, and the operation more convenient and fast.

Referring to <FIG>, the difference between this embodiment and the first embodiment is that: the connecting assembly <NUM> includes a connecting block <NUM>, one end of which is fixedly connected to the mounting plate <NUM> and the other end is fixedly connected to the welding head <NUM>. During assembly of the welding head <NUM>, the mounting plate <NUM> slides directly into the mounting groove <NUM> to assemble the welding head <NUM>, so that the movable mechanism <NUM> can be applied to different types of welding heads <NUM>, improving the compatibility of the quick-replace device for welding head of ultrasonic metal welding machine.

The implementation principle of the second embodiment is as follows: during assembly of the welding head <NUM>, the mounting plate <NUM> slides into the mounting groove <NUM> of the fixing block <NUM> to make the position limiting bar <NUM> slide into the first limit guide groove <NUM> and second limit guide groove <NUM>, the adjusting member <NUM> is then rotated to drive the abutting block <NUM> to move to fix the mounting plate <NUM>, the fastener <NUM> is then rotated to fix the adjusting member <NUM>, and finally the positioning block <NUM> is fixed to the fixing block <NUM> by bolts to complete the assembly of the welding head <NUM>. Similarly, the welding head <NUM> can be disassembled by reverse operation according to the above steps. During assembly of the welding head <NUM>, the mounting plate <NUM> slides directly into the mounting groove <NUM> to assemble the welding head <NUM>, so that the movable mechanism <NUM> can be applied to different types of welding heads <NUM>, improving the compatibility of the quick-replace device for welding head of ultrasonic metal welding machine.

In order to solve the problem that it is time-consuming, laborious and not easy to operate for assembly/disassembling the welding head, the embodiments of the present application further discloses a quick-replace method for welding head of ultrasonic metal welding machine, which is further described in detail with reference to <FIG> below.

The quick-replace method for welding head of ultrasonic metal welding machine, which is implemented by the quick-replace device for welding head of ultrasonic metal welding machine described above, includes the following steps:.

Preferably, the first direction and the second direction are perpendicular to each other, and contact surfaces of the abutting block <NUM> and the mounting plate <NUM> are inclined to a certain angle, such as <NUM> degrees, with respect to the first direction and the second direction. During assembly of the welding head <NUM>, the sliding direction of the mounting plate <NUM> is different from the sliding direction of the abutting block <NUM>, and the mounting plate <NUM> and abutting block <NUM> can be positioned by the inclined contact surfaces, thereby the mounting plate <NUM> can be better fixed in the mounting groove <NUM>.

By adopting the above technical solution, during assembly of the welding head <NUM>, firstly the ultrasonic triplet is mounted to the mounting plate <NUM>, and then the mounting plate <NUM> slides into the fixing block <NUM> from the open side of the mounting groove <NUM>. At this time, the mounting groove <NUM> of the fixing block <NUM> supports the mounting plate <NUM>, and then the abutting block <NUM> is used to fix the mounting plate <NUM>, thus assembly of the welding head <NUM> is completed. The whole assembly process can be completed by a single worker, and it can effectively avoid the safety risk of falling of the ultrasonic triplet.

In some embodiments, the method further comprises disassembling a welding head <NUM> to be replaced before step S11, and disassembling the welding head <NUM> to be replaced comprises the following steps:.

By adopting the above technical solution, during disassembling the welding head <NUM>, firstly the abutting block <NUM> is adjusted to release the fixed state with the mounting plate <NUM>. At this time, the mounting groove <NUM> of the fixing block <NUM> supports the mounting plate <NUM>, and the ultrasonic triplet is not prone to the safety risk of falling, and then the mounting plate <NUM> slides out of the mounting groove <NUM> to complete the disassembly of the welding head <NUM>. The whole disassembly process can be completed by a single worker, and it can effectively avoid the safety risk of falling of the ultrasonic triplet.

According to the invention, the method further comprises: providing a positioning block <NUM> and connecting the positioning block <NUM> to the open side of the mounting groove <NUM> of the fixing block <NUM> after step S13, so as to limit the movement of the mounting plate <NUM> along the fourth direction; and removing the positioning block <NUM> which is connected to the open side of the mounting groove <NUM> of the fixing block <NUM> before step S01.

By adopting the above technical solution, the positioning block <NUM> is mounted onto the fixing block <NUM> to limit the sliding of the mounting plate <NUM> after the assembly of the mounting plate <NUM> is finished, so as to further fix the mounting plate <NUM>. Similarly, during disassembly of the mounting plate <NUM>, it is necessary to remove the positioning block <NUM> firstly.

In some embodiments, the step S11 comprises: providing a position plate <NUM> with a latching slot <NUM> and connecting the position plate <NUM> to the mounting plate <NUM> detachably; docking the welding head <NUM> to be assembled with the latching slot <NUM> for positioning, so that the welding head <NUM> is perpendicular to the mounting plate <NUM>; clamping the welding head <NUM> through the connecting assembly <NUM> and moving relative to the mounting plate <NUM> until the connecting assembly <NUM> contacts with the position plate <NUM>; fixing the connecting assembly <NUM> to the mounting plate <NUM>; and removing the position plate <NUM> from the mounting plate <NUM>.

By adopting the above technical solution, during assembly of the welding head <NUM>, the position plate <NUM> is mounted onto the mounting plate <NUM> for positing the welding head <NUM>, making the positioning of the welding head <NUM> more convenient and accurate during installation.

Claim 1:
A quick-replace device for welding head of ultrasonic metal welding machine, wherein
the quick-replace device comprises
a fixing mechanism (<NUM>) for a fixed connection to a framework and
a movable mechanism (<NUM>) for fixing an ultrasonic triplet, the ultrasonic triplet including a transducer, an amplitude modulator and a welding head,
the movable mechanism (<NUM>) being detachably mounted in the fixing mechanism (<NUM>), and comprising a mounting plate (<NUM>) and a connecting assembly (<NUM>) for fixing the ultrasonic triplet, the connecting assembly (<NUM>) being arranged on the mounting plate (<NUM>);
the fixing mechanism (<NUM>) comprising a fixing block (<NUM>) for the fixed connection to the framework,
an abutting block (<NUM>) for fixing the mounting plate (<NUM>) being mounted in the fixing block (<NUM>), and
a positioning block (<NUM>) which is detachably mounted on the fixing block (<NUM>) in a direction perpendicular to a sliding direction of the mounting plate (<NUM>) and abuts against the mounting plate (<NUM>) in a direction perpendicular to the adjusting direction of the abutting block (<NUM>), characterized in that
the fixing mechanism (<NUM>) comprises a mounting groove (<NUM>) being defined in the fixing block (<NUM>) with at least one side thereof being open and extending in use in a direction perpendicular to the framework, the mounting plate (<NUM>) being slidably mounted in the mounting groove (<NUM>).