WELDING POSITIONING CLAMP

This utility model relates to a welding positioning clamp including a first lateral press, a base, an installation plate, and a positioning structure. The first lateral press may be provided on the installation plate, and the positioning structure may be configured to position a workpiece along a third direction. The first lateral press may include a first lateral pressing block and a first reference block that may be provided on a reference side, and a second lateral pressing block provided on a movable side. Both the second lateral pressing block and the first lateral pressing block may be capable of moving along a first direction, and the first reference block may be at a fixed position along the first direction.

TECHNICAL FIELD

This application relates to the field of traction battery technologies, and more specifically, to a welding positioning clamp.

BACKGROUND

With popularization and promotion of new energy vehicles, safety and reliability of new energy vehicles are attracting increasing attention. A traction battery is a rechargeable battery and a power source of the new energy vehicle, and is widely used in the field of new energy vehicles.

Currently, a traction battery includes a battery cell and a box. The box includes a first part and a second part that are engaged with each other. The second part and the first part are welded and fixed to form a box with an accommodating cavity, and the battery cell is placed in the accommodating cavity. The first part and second part of the box need to be positioned to ensure that a gap between the first part and the second part is within a preset range. However, if effective positioning cannot be implemented because a pressing block in an existing positioning clamp is worn out, the gap (that is, a welding joint) between the first part and the second part exceeds the preset range, and laser leaks from the gap, causing damage to the battery cell.

SUMMARY

In view of this, this application discloses a welding positioning clamp.

A welding positioning clamp includes: a first lateral pressing apparatus or press, where the first lateral pressing apparatus is configured to position a workpiece along a first direction, and the first direction is a thickness direction of the workpiece; a base and an installation plate, where the installation plate is movably provided at the base along a second direction perpendicular to the first direction, and the first lateral pressing apparatus is provided on the installation plate: and a positioning apparatus or structure, where the positioning apparatus is configured to position the workpiece along a third direction, the third direction is perpendicular to the first direction and the second direction separately, and the positioning apparatus is slidably provided on the installation plate along the first direction and covers a top of the first lateral pressing apparatus, where the first lateral pressing apparatus has a movable side and a reference side that are opposite each other along the first direction: and the first lateral pressing apparatus includes a first lateral pressing block and a first reference block that are provided at the reference side, and a second lateral pressing block provided at the movable side, both the second lateral pressing block and the first lateral pressing block are capable of moving along the first direction, and the first reference block is at a fixed position along the first direction. In the foregoing welding positioning clamp, a first reference block and a first lateral pressing block are provided on the reference side of the first lateral pressing apparatus. The first reference block is at a fixed position and used as a positioning reference, and the first lateral pressing block can move along the first direction. Even if one of the first reference block or the first lateral pressing block is worn out, the reference side and the movable side of the first lateral pressing apparatus can still fit to press the workpiece tightly, thereby reducing the risk of laser leakage from a gap when the workpiece is not pressed tightly.

In an embodiment, at least two first reference blocks are provided on the reference side along the second direction, and at least one first lateral pressing blocks is provided between the two outermost first reference blocks along the second direction. In this way, at least two first reference blocks are provided on the reference side along the second direction, and at least one first lateral pressing block is provided between the two outermost first reference blocks along the second direction. When either of the first reference block and the first lateral pressing block is worn out, the reference side of the first lateral pressing apparatus can still press the workpiece tightly, thereby reducing positioning deviation of the workpiece that is caused because the first reference block is worn out.

In an embodiment, at least two first lateral pressing blocks are provided between the outermost first reference blocks along the second direction. The first lateral pressing apparatus further includes a first drive member or driver corresponding to the first lateral pressing block, and the first drive member is configured to drive the first lateral pressing block to move along the first direction. In this way, at least two first lateral pressing blocks are provided between the two outermost first reference blocks along the second direction, and the first drive member is provided corresponding to the first lateral pressing block. A position of each first lateral pressing block can be independently controlled and adjusted, thereby reducing positioning deviation of the reference side that is caused because a single first lateral pressing block is worn out.

In an embodiment, at least two second lateral pressing blocks are provided on the movable side along the second direction. The first lateral pressing apparatus further includes a second drive member or driver corresponding to the second lateral pressing block, and the second drive member is configured to drive the second lateral pressing block to move along the first direction. In this way, at least two second lateral pressing blocks are provided on the movable side along the second direction, and the second drive member is provided corresponding to the second lateral pressing block. A position of each second lateral pressing block can be independently controlled and adjusted to reduce the risk that positioning of the movable side deviates because one second lateral pressing block is worn out.

In an embodiment, a drive force of the second drive member is smaller than that of the first drive member. In this way, when both the first lateral pressing block and the second lateral pressing block press the workpiece tightly, the drive force of the second drive member is smaller than that of the first drive member, which can effectively ensure that the first lateral pressing block pushes the workpiece toward the first reference block on the same side as the first lateral pressing block and presses the workpiece tightly.

In an embodiment, the welding positioning clamp further includes a controller and a detection apparatus or detector that are electrically connected, the detection apparatus is provided on the second lateral pressing block and configured to detect an actual displacement of the second lateral pressing block, and based on a difference between an actual displacement and a preset displacement, the controller controls the detection apparatus to send or skip sending a warning signal. In this way, the detection apparatus can detect the actual displacement of the second lateral pressing block, and based on the difference between the actual displacement and the preset displacement, the controller controls the detection apparatus to send or skip sending a warning signal, to effectively determine whether the second lateral pressing block is worn out, thereby further reducing the risk that the position of the workpiece deviates because the second lateral pressing block is worn out to a great extent.

In an embodiment, the welding positioning clamp further includes a second lateral pressing apparatus or press, and the second lateral pressing apparatus is configured to position the workpiece along the second direction. In this way, the workpiece can be positioned along both the first direction and the second direction, which is conducive to improvement of reliability and accuracy of positioning.

In an embodiment, the second lateral pressing apparatus includes a second reference block and a third lateral pressing block that are opposite each other along the second direction, the third lateral pressing block is capable of moving along the second direction, and the second reference block is at a fixed position along the second direction. In this way, the second reference block is at a fixed position and used as a positioning reference, and the third lateral pressing block can move along the second direction. The third lateral pressing block fits the second reference block to effectively press the workpiece tightly.

In an embodiment, the welding positioning clamp further includes a lifting apparatus or lifter, and the lifting apparatus is configured to drive the workpiece to move along the third direction. In this way, the lifting apparatus is configured to drive the workpiece to move along the third direction, so that the position of the workpiece is adjusted along the third direction.

REFERENCE SIGNS

DESCRIPTION OF EMBODIMENTS

To make the objectives, features and advantages of this application more comprehensible, the following further describes specific embodiments of this application in detail with reference to the accompanying drawings. In the following descriptions, numerous specific details are set forth in order to provide a thorough understanding of this application. However, this application may be implemented in many other ways different from those described herein, and a person skilled in the art can make similar improvements without violating the connotation of this application. Therefore, this application is not restricted by the specific embodiments disclosed below:

In the descriptions of this application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “vertical”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “perpendicular”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, and the like are based on the orientations or positional relationships shown in the accompanying drawings, are merely intended to facilitate the descriptions of this application and simplify the descriptions, are not intended to indicate or imply that the apparatuses or components mentioned in this application must have specific orientations, or be constructed and operated for a specific orientation, and therefore shall not be construed as a limitation on this application.

In addition, the terms “first” and “second” are merely intended for a purpose of description, and shall not be understood as an indication or implication of relative importance or implicit indication of a quantity of indicated technical features. Therefore, a feature defined by “first” or “second” may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of “a plurality of” is at least two, for example two, three, or the like, unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Further, the first feature being “on”, “above”, or “on top of” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply mean that the first feature is horizontally higher than the second feature. The first feature being “under”, “below”, or “beneath” the second feature may mean that the first feature is directly beneath or obliquely beneath the second feature, or simply mean that the first feature is horizontally lower than the second feature.

It should be noted that when an element is referred to as being “fixed to” or “provided at” another element, it may be directly on the another element, or there may be an in-between element. When an element is deemed as being “connected to” another element, it may be directly connected to the another element, or there may be an in-between element. The terms “vertical”, “horizontal”, “upper”, “lower”, “left”, “right”, and other similar expressions as used herein are for illustration only, and do not indicate this embodiment is exclusive.

With popularization and promotion of new energy vehicles, safety and reliability of new energy vehicles are attracting increasing attention. A traction battery is a rechargeable battery and a power source of the new energy vehicle, and is widely used in the field of new energy vehicles.

Currently, a traction battery includes a battery cell and a box. The box includes a first part and a second part that are engaged with each other. The second part and the first part are welded and fixed to form a box with an accommodating cavity, and the battery cell is placed in the accommodating cavity. The first part and the second part of the box need to be positioned to ensure that a gap between the first part and the second part is within a preset range. However, if effective positioning cannot be implemented because a pressing block in an existing positioning clamp is worn out, the gap (that is, a welding joint) between the first part and the second part exceeds the preset range, and laser leaks from the gap, causing damage to the battery cell.

Based on the foregoing considerations, the inventor has designed a welding positioning clamp through in-depth research. A first reference block120and a first lateral pressing block110are provided on the reference side102of the first lateral pressing apparatus100. The first reference block120is at a fixed position and used as a positioning reference, and the first lateral pressing block110is capable of moving along the first direction. Even if one of the first reference block120or the first lateral pressing block110is worn out, the reference side102and the movable side101of the first lateral pressing apparatus100can still fit to press the workpiece10tightly, thereby reducing the risk of laser leakage from a gap when the workpiece10is not pressed tightly.

Referring toFIG.1andFIG.2, in an embodiment, the welding positioning clamp includes a first lateral pressing apparatus100, a base500, an installation plate600, and a positioning apparatus400. The first lateral pressing apparatus100is configured to position the workpiece10along the first direction, the first direction is a thickness direction of the workpiece10, the installation plate600is movably provided at the base500along the second direction perpendicular to the first direction, and the first lateral pressing apparatus100is provided on the installation plate600. The positioning apparatus400is configured to position the workpiece10along a third direction. The third direction is perpendicular to the first direction and the second direction separately, and the positioning apparatus400is slidably provided on the installation plate600along the first direction and covers a top of the first lateral pressing apparatus100. The first lateral pressing apparatus100has a movable side101and a reference side102that are opposite each other along the first direction, the first lateral pressing apparatus100includes a first lateral pressing block110and a first reference block120that are provided at the reference side102, and a second lateral pressing block130provided at the movable side101, both the second lateral pressing block130and the first lateral pressing block110are capable of moving along the first direction, and the first reference block120is at a fixed position along the first direction.

It should be noted that the movable side101and the reference side102of the first lateral pressing apparatus100press two sides of the workpiece10respectively. As shown inFIG.2, before the workpiece10is effectively positioned along the first direction (direction X shown inFIG.1), the workpiece10is moved to reach a preset height, then the second lateral pressing block130is moved along the first direction, and the workpiece10is pushed to the first reference block120. The second lateral pressing block130is stopped from moving when the workpiece10abuts against the first reference block120, and then the first lateral pressing block110is moved along the first direction, and stopped from moving when the first lateral pressing block110abuts against the workpiece10, so that both the movable side101and the reference side102of the first lateral pressing apparatus100press the workpiece10tightly.

In this case, the second direction is a direction Y shown inFIG.2, that is, a length direction of the workpiece10. The third direction is a direction Z shown inFIG.1, and the third direction is a height direction of the workpiece10. Before the workpiece10is effectively positioned along the third direction (direction Z shown inFIG.3), the workpiece10first moves along the third direction until the workpiece10abuts against the positioning apparatus400, so that after the workpiece10is positioned in the height direction, the workpiece10is positioned along the first direction and the second direction.

In this embodiment of this application, the positioning apparatus400is a positioning plate, and the positioning plate is a rectangular plate to match the workpiece10. In other embodiments, the positioning plate may also have another shape. In this embodiment of this application, the installation plate600is provided with a sliding rail and a sliding block provided on the sliding rail, and the positioning apparatus400is fixed to the sliding rail so that the positioning apparatus400can slide relative to the installation plate600.

In this embodiment of this application, the workpiece10is a prismatic battery. As shown inFIG.1, the prismatic battery includes a battery cell11and a box12configured to accommodate the battery cell11. The box12includes a first part12aand a second part12b, the first part12ais a hollow structure with an open side and the second part12bis a plate-like structure, and the second part12bis engaged with the open side of the first part12ato form a box12with an accommodating cavity. After the box12is positioned by using the foregoing welding positioning clamp, the first part12aand the second part12bare fixed by laser welding, and during welding, it needs to be ensured that a gap (that is, a welding joint) between the first part12aand the second part12bis within a preset range to reduce a risk of damaging the battery cell11because laser leakage occurs at the gap.

In this embodiment of this application, the first lateral pressing apparatus100is configured as a structure for pressing the workpiece10tightly along the thickness direction of the workpiece10. The first lateral pressing block110, the first reference block120, and the second lateral pressing block130in the first lateral pressing apparatus100may be cylindrical or prismatic or have another shape, and quantities of the first lateral pressing blocks110, the first reference blocks120, and the second lateral pressing blocks130are not limited to one. In this case, the shapes and the quantities of the first lateral pressing blocks110, the first reference blocks120, and the second lateral pressing blocks130are not specifically limited.

In the foregoing welding positioning clamp, a first reference block120and a first lateral pressing block110are provided on the reference side102of the first lateral pressing apparatus100. The first reference block120is at a fixed position and used as a positioning reference, and the first lateral pressing block110is capable of moving along the first direction. Even if one of the first reference block120or the first lateral pressing block110is worn out, the reference side102and the movable side101of the first lateral pressing apparatus100can still fit to press the workpiece10tightly, thereby reducing the risk of laser leakage from a gap when the workpiece10is not pressed tightly.

According to some embodiments of this application, referring toFIG.2, at least two first reference blocks120are provided on the reference side102along the second direction perpendicular to the first direction, and at least one first lateral pressing block110is provided between the two outermost first reference blocks120along the second direction.

In this embodiment of this application, the first lateral pressing block110and all the first reference blocks120are provided side by side and equally spaced apart along the second direction. For example, as shown inFIG.1, two first reference blocks120and two first lateral pressing blocks110are provided on the reference side102along the second direction. The two first reference blocks120are located at the outermost positions in the second direction, and the two first lateral pressing blocks110are provided between the two first reference blocks120. The two first reference blocks120and the two first lateral pressing blocks110are provided side by side and equally spaced apart along the second direction. In other embodiments, the first lateral pressing block110and all the first reference blocks120may alternatively be provided side by side and unequally spaced apart along the second direction.

With the foregoing setting, at least two first reference blocks120are provided on the reference side102along the second direction, and at least one first lateral pressing block110is provided between the two outermost first reference blocks120along the second direction. When either of the first reference blocks120and the first lateral pressing block110is worn out, the reference side102of the first lateral pressing apparatus100can still press the workpiece10tightly, thereby reducing positioning deviation of the workpiece10that is caused because the first reference block120is worn out.

According to some embodiments of this application, referring toFIG.2, at least two first lateral pressing blocks110are provided between the two outermost first reference blocks120along the second direction, and the first lateral pressing apparatus100further includes a first drive member140provided corresponding to the first lateral pressing block110, and the first drive member140is configured to drive the first lateral pressing block110to move along the first direction.

In this embodiment of this application, the first drive member140is a cylinder, and the first drive member140can drive the first lateral pressing block110to move translationally to adjust the position of the first lateral pressing block110along the first direction.

In this embodiment of this application, all the first lateral pressing blocks110are provided side by side and equally spaced apart along the second direction. For example, as shown inFIG.1, two first reference blocks120and two first lateral pressing blocks110are provided on the reference side102along the second direction. The two first reference blocks120are located at the outermost positions in the second direction, and the two first lateral pressing blocks110are provided between the two first reference blocks120. The two first reference blocks120and the two first lateral pressing blocks110are provided side by side and equally spaced apart along the second direction. In other embodiments, all the first lateral pressing blocks110may alternatively be provided side by side and unequally spaced apart along the second direction.

With the foregoing setting, at least two first lateral pressing blocks110are provided between the two outermost first reference blocks120along the second direction, and the first drive member140is provided corresponding to the first lateral pressing blocks110. A position of each first lateral pressing block110can be independently controlled and adjusted, thereby reducing positioning deviation of the reference side102that is caused because a single first lateral pressing block110is worn out.

According to some embodiments of this application, referring toFIG.2, at least two second lateral pressing blocks130are provided on the movable side101along the second direction, the first lateral pressing apparatus100further includes a second drive member150provided corresponding to the second lateral pressing block130, and the second drive member150is configured to drive the second lateral pressing block130to move along the first direction.

In this embodiment of this application, the second drive member150is a cylinder, and the second drive member150can drive the second lateral pressing block130to move translationally to adjust the position of the second lateral pressing block130along the first direction.

In this embodiment of this application, all the second lateral pressing blocks130are provided side by side and equally spaced apart along the second direction. In other embodiments, all the second lateral pressing blocks may alternatively be provided side by side and unequally spaced apart along the second direction.

With the foregoing setting, at least two second lateral pressing blocks130are provided on the movable side101along the second direction, and the second drive member150is provided corresponding to the second lateral pressing block130, and the position of each second lateral pressing block130can be independently controlled and adjusted to reduce the risk that positioning of the movable side101deviates because single second lateral pressing block130is worn out.

According to some embodiments of this application, referring toFIG.2, a drive force of the second drive member150is smaller than that of the first drive member140.

In this embodiment of this application, both the first drive member140and the second drive member150are cylinders. A cylinder bore of the second drive member150is smaller than that of the first drive member140so that the drive force of the second drive member150is smaller than that of the first drive member140.

It can be understood that the second lateral pressing block130and the first lateral pressing block110press the workpiece10on different sides of the workpiece10. The second drive member150is configured to drive the second lateral pressing block130to move along the first direction, and the first drive member140is configured to drive the first lateral pressing block110to move along the first direction.

With the foregoing setting, when both the first lateral pressing block110and the second lateral pressing block130press the workpiece10tightly, the drive force of the second drive member150is smaller than that of the first drive member140, which can effectively ensure that the first lateral pressing block110pushes the workpiece10toward the first reference block120on the same side as the first lateral pressing block110and presses the workpiece10tightly.

According to some embodiments of this application, referring toFIG.2, the welding positioning clamp further includes a controller and a detection apparatus200that are electrically connected, the detection apparatus200is provided on the second lateral pressing block130and configured to detect an actual displacement of the second lateral pressing block130, and based on a difference between the actual displacement and a preset displacement, the controller controls the detection apparatus200to send or skip sending a warning signal.

It can be understood that when the second lateral pressing block130presses the workpiece10, the detection apparatus200detects the actual displacement of the second lateral pressing block130and generates a corresponding displacement signal. The controller receives the displacement signal and compares the actual displacement with the preset displacement. When the difference between the actual displacement and the preset displacement is relatively large, this indicates that the second lateral pressing block130is worn out to a great extent, which causes a deviation of a pressing position of the workpiece10. In this case, the controller controls the detection apparatus200to send a warning signal.

Specifically, in this embodiment, the detection apparatus200includes a magnetic scale and a reading head. The magnetic scale is fixed to the second lateral pressing block130, the magnetic scale moves along with the second lateral pressing block130, the reading head is configured to obtain position information of the magnetic scale and generate a displacement signal, and the controller is configured to receive the displacement signal output by the reading head and determine whether the detection apparatus200needs to send a warning signal. In other embodiments, the detection apparatus200may further be a photoelectric detector or another element or structure that can measure a distance.

In this embodiment of this application, a quantity of the detection apparatuses200is not limited to one, that is, the quantity of the detection apparatuses200may be at least two. For example, as shown inFIG.1, four second lateral pressing blocks130are provided side by side and equally spaced apart along the second direction, and the two outermost first lateral pressing blocks110along the second direction each are provided with one detection apparatus200correspondingly, to determine whether the foregoing two first lateral pressing blocks110are worn out.

With the foregoing setting, the detection apparatus200can detect the actual displacement of the second lateral pressing block130, and based on the difference between the actual displacement and the preset displacement, the controller controls the detection apparatus200to send or skip sending a warning signal, to effectively determine whether the second lateral pressing block130is worn out, thereby further reducing the risk that the position of the workpiece10deviates because the second lateral pressing block130is worn out to a great extent.

According to some embodiments of this application, referring toFIG.2, the welding positioning clamp further includes a second lateral pressing apparatus300, and the second lateral pressing apparatus300is configured to position the workpiece10along the second direction.

With the foregoing setting, the workpiece10can be positioned along both the first direction and the second direction, which is conducive to improvement of reliability and accuracy of positioning.

According to some embodiments of this application, referring toFIG.2, the second lateral pressing apparatus300includes a second reference block310and a third lateral pressing block320that are opposite each other along the second direction, the third lateral pressing block320is capable of moving along the second direction, and the second reference block310is at a fixed position along the second direction.

In this embodiment of this application, the second lateral pressing apparatus300further includes a third drive member connected to the third lateral pressing block320, and the third drive member is configured to drive the third lateral pressing block320to move along the second direction. Optionally, the third drive member is a cylinder.

In this embodiment of this application, quantities of the second reference blocks310and the third lateral pressing blocks320are not limited to one, that is, the quantities of both the second reference blocks310and the third lateral pressing blocks320may alternatively be at least two to increase positioning points along the second direction.

It should be noted that after the workpiece10is positioned along the first direction, the third lateral pressing block320moves along the second direction and pushes the workpiece10to move to and abut against the second reference block310so that the workpiece10is positioned along the second direction.

With the foregoing setting, the second reference block310is at a fixed position and used as a positioning reference, and the third lateral pressing block320can move along the second direction. The third lateral pressing block320fits the second reference block310to effectively press the workpiece10tightly.

According to some embodiments of this application, referring toFIG.2andFIG.3, the welding positioning clamp further includes a lifting apparatus, and the lifting apparatus is configured to drive the workpiece10to move along the third direction.

It can be understood that both the base500and the installation plate600are provided with a positioning groove601for positioning the workpiece10, and the workpiece10is fed into the positioning groove601from the bottom to the top, so that the workpiece10moves along the third direction until the workpiece abuts against the positioning apparatus400, and then the second lateral pressing block130moves along the first direction and pushes the workpiece10to the first reference block120, and the second lateral pressing block130stops moving when the workpiece10abuts against the first reference block120, and then the first lateral pressing block110moves along the first direction, and stops moving when the first lateral pressing block110abuts against the workpiece10, so that both the movable side101and the reference side102of the first lateral pressing apparatus100press the workpiece10along the first direction tightly: The third lateral pressing block320moves along the second direction and pushes the workpiece10to move until the workpiece10abuts against the second reference block310, so that the workpiece10is positioned along the second direction.

With the foregoing setting, the lifting apparatus is configured to drive the workpiece10to move along the third direction, so that the position of the workpiece10is adjusted along the third direction.

According to some embodiments of this application, referring toFIG.1toFIG.3, this application provides a welding positioning clamp. The welding positioning clamp includes a first lateral pressing apparatus100, a controller, a detection apparatus200, a second lateral pressing apparatus300, a positioning apparatus400, a base500, an installation plate600, and a lifting apparatus. The first lateral pressing apparatus100is configured to position the workpiece10along the first direction, the first direction is a thickness direction of the workpiece10, and the second lateral pressing apparatus300is configured to position the workpiece10along the second direction.

The first lateral pressing apparatus100includes a first lateral pressing block110, a first reference block120, a second lateral pressing block130, a first drive member140, and a second drive member150. The first lateral pressing apparatus100has a movable side101and a reference side102that are opposite each other along the first direction. At least two first reference blocks120are provided on the reference side102along the second direction perpendicular to the first direction, and at least two first lateral pressing blocks110are provided between the two outermost first reference blocks120along the second direction. The first drive member140is configured to drive the first lateral pressing block110to move along the first direction. At least two second lateral pressing blocks130are provided on the movable side101along the second direction, and the second drive member150is configured to drive the second lateral pressing block130to move along the first direction. The second lateral pressing block130and the first lateral pressing block110are capable of moving along the first direction, the first reference block120is at a fixed position along the first direction, and the drive force of the second drive member150is smaller than that of the first drive member140. The second lateral pressing apparatus300includes a second reference block310and a third lateral pressing block320that are opposite each other along the second direction. The third lateral pressing block320is capable of moving along the second direction, and the second reference block310is at a fixed position along the second direction. The positioning apparatus400is configured to position the workpiece10along the third direction, the third direction is perpendicular to the first direction and the second direction separately, and the lifting apparatus is configured to drive the workpiece10to move along the third direction.

Technical features in the foregoing embodiments may be combined in any way. For brevity of description, possible combinations of the technical features in the foregoing embodiments are not described all. However, as long as there is no contradiction among combinations of these technical features, all the combinations should be considered within a range recorded in this specification.

The foregoing embodiments only represent several implementations of this application, and descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of this application. It should be noted that a person of ordinary skill in the art may further make several modifications and improvements without departing from the concept of this application, and all these modifications and improvements fall within the protection scope of this application. Therefore, the protection scope of this application should be subject to the appended claims.