Welding fixture

Abstract

This application discloses a welding fixing device, including a limiting member, a supporting member, and a fixing member. The limiting member includes multiple limiting holes extending along a first direction, which are used to limit the position of a first workpiece to be welded inserted therein. The supporting member includes a supporting plate and multiple positioning structures disposed on the surface of the supporting plate. The supporting plate and the multiple positioning structures can define an installation space for stacking and installing a second workpiece to be welded and the limiting member. The fixing member is detachably connected to the end of the positioning structure away from the supporting plate, and is used to fix the limiting member, the first workpiece to be welded, and the second workpiece to be welded in the first direction. The welding fixing device of this application can accurately position and fix the copper clip in the welding position, avoid positional deviation of the copper clip, and ensure the welding stability of the copper clip.

Description

Technical Field

[0001] This application belongs to the field of semiconductor packaging technology, and in particular relates to a welding and fixing device. Background Technology

[0002] Power modules are important semiconductor devices that perform power conversion and regulation. During the packaging process, semiconductor chips are typically connected to a lead frame or substrate using wire bonding to enable signal connections between the chip and external devices. However, wire bonding leads to lower reliability in power modules, so copper clip soldering is now commonly used to connect the chips.

[0003] When connecting chips to copper clips, reflow soldering is usually used. However, copper clips are small and lightweight, making it difficult to accurately control their placement on the chip surface. Furthermore, the copper clips are prone to shifting during operation, which can cause chip scratches and poor soldering. Utility Model Content

[0004] This application provides a welding fixing device that can accurately position and fix the copper clip at the welding position, avoid positional deviation of the copper clip, and ensure the welding stability of the copper clip.

[0005] This application provides a welding fixing device, comprising: a limiting member including a plurality of limiting holes extending through a first direction, the limiting holes being used to limit a first workpiece to be welded inserted therethrough; a bearing member including a bearing plate and a plurality of positioning structures disposed on the surface of the bearing plate, the bearing plate and the plurality of positioning structures being able to define an installation space for stacking and installing a second workpiece to be welded and the limiting member; and a fixing member detachably connected to the end of the positioning structures away from the bearing plate, for fixing the limiting member, the first workpiece to be welded, and the second workpiece to be welded in the first direction.

[0006] The welding fixing device described above includes a fixing plate and multiple pressing blocks. The fixing plate is detachably connected to the positioning structure, and the pressing blocks are movably installed on the fixing plate along a first direction for pressing the first workpiece to be welded onto the surface of the second workpiece to be welded.

[0007] The welding and fixing device described above includes a fixing plate with multiple through holes arranged along a first direction, and multiple through holes and multiple limiting holes are arranged in a one-to-one correspondence. The pressing block is slidably inserted into the through holes along the first direction.

[0008] The welding fixing device described above includes a pressing block comprising a limiting part and a pressing part connected to each other. The limiting part is located on the side of the fixing plate away from the bearing member, and the projection of the limiting part on the fixing plate completely covers the projection of the corresponding through hole on the fixing plate. The pressing part extends along the first direction and is slidably inserted into the through hole.

[0009] The welding fixing device described above includes a limiting hole comprising welding hole segments and a limiting hole segment arranged sequentially along a second direction. Adjacent welding hole segments along the second direction are connected by the limiting hole segment. The width of the limiting hole segment in the third direction is less than the width of the welding hole segment in the third direction. The welding hole segments are used to avoid the welding parts of the first and second workpieces to be welded, and the limiting hole segments are used to limit the first workpiece to be welded in the second direction and the third direction.

[0010] The welding fixing device described above includes a positioning structure comprising two positioning parts connected at an inclined angle, the two positioning parts being used to abut against different side walls of the second workpiece to be welded.

[0011] The welding and fixing device described above includes a limiting member that further includes multiple support parts protruding from the surface. The multiple support parts surround the periphery of the multiple limiting holes, and the multiple support parts are arranged in a one-to-one correspondence with the multiple positioning structures. Each support part abuts against the two positioning parts of the corresponding positioning structure.

[0012] In the welding and fixing device described above, each positioning structure has a positioning hole recessed towards the carrier in the first direction, and the fixing plate and the carrier are positioned and fitted through the positioning holes on the multiple positioning structures.

[0013] The welding and fixing device described above includes a fixing plate with multiple fixing parts, which are arranged one-to-one with multiple positioning structures. Each fixing part includes a fixing block and a fixing rod. The fixing rod protrudes from the surface of the fixing block along a first direction and is used to engage with the positioning hole of the corresponding positioning structure.

[0014] The welding fixture described above, wherein the material of the bearing plate includes aluminum or graphite.

[0015] The welding fixing device of this application includes a limiting member, a bearing member, and a fixing member. The bearing member includes a bearing plate and multiple positioning structures disposed on the surface of the bearing plate. The bearing plate and the multiple positioning structures can jointly define an installation space. The second workpiece to be welded, such as a lead frame or a substrate, and the limiting member can be stacked and installed in the installation space along a first direction. The limiting member is disposed on the surface of the second workpiece to be welded. Multiple limiting holes extending along the first direction of the limiting member are used to pass through the first workpiece to be welded, such as copper clips disposed on the surface of the second workpiece to be welded, so as to position the first workpiece to be welded in the second and third directions. The fixing member is detachably connected to the end of the positioning structure away from the bearing plate, so as to fix the first workpiece to be welded to the surface of the second workpiece to be welded in the first direction. Therefore, the welding fixing device of this application can fix the second workpiece to be welded and can accurately position and fix the position of the first workpiece to be welded on the second workpiece to be welded, avoiding deviation in the welding position between the first workpiece to be welded and ensuring the welding stability between the two. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the welding fixing device according to an embodiment of this application;

[0018] Figure 2 This is a side view of the welding fixing device according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the structure of the limiting member of the welding fixing device according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the support component of the welding fixing device according to an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the structure of the fixing component of the welding fixing device according to an embodiment of this application.

[0022] Explanation of icon numbers:

[0023] 10. Limiting component; 11. Limiting hole; 111. Welding hole section; 112. Limiting hole section; 12. Support part;

[0024] 20. Supporting component; 21. Supporting plate; 22. Positioning structure; 221. Positioning part; 222. Positioning hole; 23. Installation space;

[0025] 30. Fastener; 31. Fixing plate; 311. Through hole; 312. Fixing part; 313. Fixing block; 314. Fixing rod; 32. Pressing block; 321. Limiting part; 322. Pressing part;

[0026] 110. First component to be soldered; 120. Second component to be soldered; 121. Chip;

[0027] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0028] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0029] like Figures 1 to 5 As shown, this application embodiment provides a welding fixing device, which includes a limiting member 10, including a plurality of limiting holes 11 through which a first workpiece 110 is disposed in a first direction X, the limiting holes 11 being used to limit the first workpiece 110 to be welded through them; a bearing member 20, including a bearing plate 21 and a plurality of positioning structures 22 disposed on the surface of the bearing plate 21, the bearing plate 21 and the plurality of positioning structures 22 being able to define an installation space 23 for stacking and installing a second workpiece 120 to be welded and the limiting member 10; and a fixing member 30, detachably connected to the end of the positioning structure 22 away from the bearing plate 21, for fixing the limiting member 10, the first workpiece 110 and the second workpiece 120 in the first direction X.

[0030] It should be noted that, as Figure 1 As shown, in this embodiment of the application, the first direction X is the height direction, such as... Figure 3 As shown, the second direction Y and the third direction Z are both directions in a plane perpendicular to the height direction, and the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other. In the actual use of the welding fixing device, the first direction X, the second direction Y, and the third direction Z are not limited to the specific directions in the embodiments of this application; it is only necessary to ensure that the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other.

[0031] In the embodiments of this application, the second component to be soldered 120 is specifically a DBC (Direct Bond Copper) substrate, but IMS (Insulated Metal Substrate), PCB (Printed Circuit Board), or lead frame structure can also be selected. The first component to be soldered 110 is specifically a copper clip structure. The first component to be soldered 110 with the copper clip structure can be soldered to the chip 121 on the second component to be soldered 120, thereby realizing the connection between the chip 121 and the pin.

[0032] In specific implementation, the welding fixing device of this application embodiment includes a limiting member 10, a bearing member 20, and a fixing member 30. The bearing member 20 includes a bearing plate 21 and a plurality of positioning structures 22 disposed on the surface of the bearing plate 21. The bearing plate 21 and the plurality of positioning structures 22 can jointly define an installation space 23. The second workpiece to be welded 120 and the limiting member 10 can be stacked and installed in the installation space 23 along the first direction X. The limiting member 10 is disposed on the surface of the second workpiece to be welded 120. The plurality of limiting holes 11 of the limiting member 10 extending along the first direction X are used to pass through the copper clips and other first workpieces to be welded 110 disposed on the surface of the second workpiece to be welded 120, so as to position the first workpiece to be welded 110 in the second direction Y and the third direction Z, so as to avoid the first workpiece to be welded 110 from shaking in the second direction Y and the third direction Z, which would cause a deviation in the welding position between it and the second workpiece to be welded 120.

[0033] The fixing member 30 is detachably connected to the end of the positioning structure 22 away from the bearing plate 21, so as to fix the first workpiece to be welded 110 to the surface of the second workpiece to be welded 120 in the first direction X, so as to prevent the first workpiece to be welded 110 from moving in the first direction X, causing the first workpiece to be welded 110 to detach from the surface of the second workpiece to be welded 120 and thus making welding impossible. This reduces the risk of poor welding and suppresses the tilting of the weld layer. In addition, the fixing member 30 can also fix the limiting member 10 in the first direction X, so that the limiting hole 11 of the limiting member 10 can be stably engaged with the corresponding first workpiece to be welded 110, preventing the first workpiece to be welded 110 from detaching from the limiting hole 11, further improving the positioning accuracy and fixing stability of the first workpiece to be welded 110.

[0034] Therefore, the welding fixing device of this application embodiment can fix the second workpiece 120 to be welded and can accurately position and fix the first workpiece 110 on the second workpiece 120 to be welded, realizing the three-way positioning of the first workpiece 110 to be welded during the mounting and welding process, avoiding deviation in the welding position between the first workpiece 110 and the second workpiece 120 to be welded, ensuring the welding stability between the two, and also avoiding the situation where the first workpiece 110 moves and scratches the second workpiece 120 to be welded.

[0035] In this process, the first workpiece 110 and the chip 121 of the second workpiece 120 are soldered together using solder paste or solder pads. When using solder paste, the substrate of the second workpiece 120 needs to be copper-plated before it is placed in the mounting space 23, and solder paste needs to be printed at the soldering position of the chip 121. Then, the second workpiece 120 is placed in the mounting space 23, and then the limiting member 10 is assembled in the mounting space 23 so that the limiting hole 11 of the limiting member 10 is aligned with the position of the chip 121. Then, the chip 121 is inserted according to the position of the limiting hole 11. A first workpiece 110 is placed on the soldering position of the chip 121 to prepare for subsequent soldering operations. If solder pads are used for soldering, the second workpiece 120 can be placed directly in the mounting space 23. Then, the limiting member 10 is assembled in the mounting space 23 so that the limiting hole 11 of the limiting member 10 is aligned with the position of the chip 121. Then, according to the position of the limiting hole 11, the solder pads and the first workpiece 110 are arranged in sequence so that the solder pads and the first workpiece 110 are sequentially attached to the soldering position of the chip to prepare for subsequent soldering operations.

[0036] In the embodiments of this application, the shape of the limiting hole 11 is adapted to the shape of the copper clip structure of the first workpiece to be welded 110. However, in order to ensure that the first workpiece to be welded 110 can pass through into the limiting hole 11, a certain machining tolerance is required. Therefore, when the limiting hole 11 positions the first workpiece to be welded 110, a single-sided positioning method is adopted. That is, when the first workpiece to be welded 110 passes through the limiting hole 11, the first workpiece to be welded 110 abuts against the adjacent connected side walls of the limiting hole 11, thereby achieving accurate positioning of the first workpiece to be welded 110 in the second direction Y and the third direction Z. Furthermore, within a reasonable tolerance range between the limiting hole 11 and the first workpiece to be welded 110, the first workpiece to be welded 110 will not experience a large amount of shaking, thus ensuring the fixation of the first workpiece to be welded 110 in the second direction Y and the third direction Z.

[0037] like Figure 1 and Figure 2 As shown in the embodiment of this application, the welding fixing device includes a fixing plate 31 and a plurality of pressing blocks 32. The fixing plate 31 is detachably connected to the positioning structure 22, and the pressing blocks 32 are movably installed on the fixing plate 31 along the first direction X, for pressing the first workpiece to be welded 110 onto the surface of the second workpiece to be welded 120.

[0038] In specific implementation, multiple pressing blocks 32 are movably installed on the fixing plate 31 along the first direction X. After the fixing plate 31 is installed on the positioning structure 22, the pressing blocks 32 can move along the first direction X and exert pressure on the first workpiece to be welded 110 toward the second workpiece to be welded 120, so that the first workpiece to be welded 110 can be stably set on the surface of the second workpiece to be welded 120. Therefore, the pressing blocks 32 achieve accurate fixation of each first workpiece to be welded 110, further improving the stability of the first workpiece to be welded 110 in the first direction X, effectively avoiding the situation of the first workpiece to be welded 110 being blown away and tilted during the welding process, reducing the risk of incomplete welding of the first workpiece to be welded 110 and the second workpiece to be welded 120, and improving welding stability and welding yield.

[0039] like Figure 1 and Figure 5 As shown in the embodiment of the present application, the welding fixing device has a fixing plate 31 having a plurality of through holes 311 arranged along the first direction X. The plurality of through holes 311 are arranged in a one-to-one correspondence with a plurality of limiting holes 11. The pressing block 32 is slidably inserted into the through holes 311 along the first direction X.

[0040] In specific implementation, the pressing block 32 can be inserted into the through hole 311 along the first direction X and can slide within the through hole 311. The through hole 311 enables the positioning of the pressing block 32. The pressing block 32 can be precisely positioned with the first workpiece 110 to be welded in the limiting hole 11, so that the pressing block 32 can be accurately pressed onto the surface of the first workpiece 110 to be welded. The pressing of the first workpiece 110 to be welded is achieved in the first direction X, avoiding the risk of false welding and improving welding stability and welding yield.

[0041] Furthermore, the multiple through holes 311 on the fixing plate 31 facilitates the insertion of the pressing block 32, and the positioning of the pressing block 32 and the first workpiece 110 to be welded in the limiting hole 11 can be achieved by positioning between the through holes 311 and the limiting hole 11, which reduces the overall positioning difficulty and facilitates operation.

[0042] In one optional embodiment, the bottom of the fixing plate 31 may be provided with a plurality of guide rails extending along the first direction X. The plurality of guide rails are provided in correspondence with a plurality of limiting holes 11. Each pressing block 32 can slide on the guide rails to contact the first workpiece to be welded 110. This also enables accurate positioning between each pressing block 32 and the first workpiece to be welded 110, as well as pressing of the pressing block 32 on the first workpiece to be welded 110.

[0043] like Figure 1 and Figure 2As shown in the embodiment of this application, the welding fixing device includes a pressing block 32 comprising a limiting part 321 and a pressing part 322 connected to each other. The limiting part 321 is disposed on the side of the fixing plate 31 away from the bearing member 20, and the projection of the limiting part 321 on the fixing plate 31 completely covers the projection of the corresponding through hole 311 on the fixing plate 31. The pressing part 322 extends along the first direction X and is slidably inserted into the through hole 311.

[0044] In specific implementation, the projection of the limiting part 321 of the pressing block 32 on the fixing plate 31 completely covers the projection of the corresponding through hole 311 on the fixing plate 31. That is, the cross-sectional area of ​​the limiting part 321 is larger than the area of ​​the through hole 311, so the limiting part 321 cannot be inserted into the through hole 311. When the pressing part 322 slides to the pressing position in the through hole 311, the limiting part 321 can abut against the top surface of the fixing plate 31, limiting the position of the pressing part 322 in the first direction X, preventing the pressing part 322 from falling out of the through hole 311, ensuring the stability and accuracy of pressing, and thus improving the stability during welding.

[0045] During the fixing process using the fastener 30, the fixing plate 31 of the fastener 30 needs to be positioned and installed with the positioning structure 22 first to ensure that the multiple through holes 311 on the fixing plate 31 can be accurately positioned with the multiple limiting holes 11. After installing the fixing plate 31, the pressing part 322 of the pressing block 32 is inserted into the through hole 311 along the first direction X until the limiting part 321 abuts against the top surface of the fixing plate 31. At this time, the pressing part 322 can press against the top surface of the first workpiece 110 to be welded, so that the first workpiece 110 to be welded can be stably attached to the welding position on the second workpiece 120. After the pressing block 32 has fixed the first workpiece 110 to be welded, the welding fixing device, the first workpiece 110 to be welded and the second workpiece 120 to be welded can be smoothly transferred as a whole to the reflow soldering process to complete the reflow soldering between the first workpiece 110 and the second workpiece 120 to be welded.

[0046] like Figure 3 As shown in the embodiment of this application, the welding fixing device includes a limiting hole 11 comprising welding hole segments 111 and limiting hole segments 112 arranged sequentially along the second direction Y. Adjacent welding hole segments 111 along the second direction Y are connected by limiting hole segments 112. The width of the limiting hole segment 112 in the third direction Z is smaller than the width of the welding hole segment 111 in the third direction Z. The welding hole segments 111 are used to avoid the welding parts of the first workpiece to be welded 110 and the second workpiece to be welded 120. The limiting hole segments 112 are used to limit the first workpiece to be welded 110 in the second direction Y and the third direction Z.

[0047] In specific implementation, the welding hole segment 111 has a larger width, which can accommodate the chip 121 of the second workpiece 120 and the part of the first workpiece 110 that is welded to the chip 121, without affecting the welding operation and ensuring the welding stability between the first workpiece 110 and the chip 121; the limiting hole segment 112 has a smaller width, which can limit the non-welding part of the first workpiece 110 in the second direction Y and the third direction Z, thereby realizing the limiting of the overall structure of the first workpiece 110, ensuring the positioning accuracy of the first workpiece 110, and enabling the first workpiece 110 to accurately match the chip 121, avoiding the occurrence of cold solder joints.

[0048] It should be noted that the welding hole segment 111 and the limiting hole segment 112 can be arranged in any direction in the plane perpendicular to the first direction X, and are not limited to being arranged in the second direction Y. The width direction of the two can be perpendicular to the arrangement direction of the two.

[0049] like Figure 4 As shown in the embodiment of the present application, the welding fixing device includes a positioning structure 22 comprising two positioning parts 221 connected at an inclined angle, the two positioning parts 221 being used to abut against different side walls of the second workpiece 120 to be welded.

[0050] In specific implementation, the two positioning parts 221 of the positioning structure 22 are connected at an inclined angle. When the second workpiece 120 is placed in the installation space 23, the two adjacent side walls of the second workpiece 120 can abut against the two positioning parts 221, thereby realizing the positioning and fixing of the second workpiece 120 in the second direction Y and the third direction Z, so that the second workpiece 120 can be stably installed in the installation space 23, and thus the second workpiece 120 can be stably and accurately positioned with the first workpiece 110.

[0051] Specifically, the welding fixing device has four positioning structures 22, which can define an installation space 23 with a rectangular cross section. The two positioning parts 221 of each positioning structure 22 are vertically connected, and the two positioning parts 221 extend along the second direction Y and the third direction Z respectively, so as to abut against the second workpiece 120 in the second direction Y and the third direction Z, and fix the second workpiece 120 in the installation space 23.

[0052] like Figure 1 and Figure 3 As shown in the welding fixing device of this application embodiment, the limiting member 10 further includes a plurality of support portions 12 protruding from the surface. The plurality of support portions 12 surround the periphery of the plurality of limiting holes 11, and the plurality of support portions 12 are arranged in a one-to-one correspondence with the plurality of positioning structures 22. Each support portion 12 abuts against the two positioning portions 221 of the corresponding positioning structure 22.

[0053] In specific implementation, the multiple support portions 12 of the limiting member 10 can support the limiting member 10 as a whole, so that the limiting member 10 is stably supported on the surface of the second workpiece 120 to be welded. The multiple support portions 12 surround the periphery of the multiple limiting holes 11, which can avoid interference with the first workpiece 110 to be welded that passes through the limiting holes 11. Each support portion 12 is abutted between the two positioning portions 221 of the corresponding positioning structure 22. The two positioning portions 221 limit the support portion 12 in the second direction Y and the third direction Z, respectively, so that the limiting member 10 will not move in the second direction Y and the third direction Z after it is installed in the installation space 23, thus ensuring the installation stability of the limiting member 10.

[0054] like Figure 4 As shown in the welding fixing device of this application embodiment, each positioning structure 22 has a positioning hole 222 recessed towards the carrier 20 along the first direction X, and the fixing plate 31 and the carrier 20 are positioned and engaged through the positioning holes 222 on the multiple positioning structures 22.

[0055] like Figure 5 As shown in the embodiment of the present application, the welding fixing device has a fixing plate 31 with a plurality of fixing parts 312, and the plurality of fixing parts 312 are provided in a one-to-one correspondence with a plurality of positioning structures 22. The fixing part 312 includes a fixing block 313 and a fixing rod 314. The fixing rod 314 protrudes from the surface of the fixing block 313 along the first direction X, and the fixing rod 314 is used to insert and cooperate with the positioning hole 222 of the corresponding positioning structure 22.

[0056] In specific implementation, multiple fixing parts 312 on the fixing plate 31 are correspondingly set with multiple positioning structures 22. The fixing rods 314 of each fixing part 312 can be inserted into the positioning holes 222 of the corresponding positioning structure 22, thereby achieving precise positioning between the fixing plate 31 and the bearing member 20. This allows multiple through holes 311 on the fixing plate 31 to be positioned relative to multiple limiting holes 11 of the limiting member 10, ensuring that the pressing block 32 can be accurately pressed into the first workpiece 110 to be welded in the limiting hole 11, thereby ensuring the welding stability between the first workpiece 110 to be welded and the second workpiece 120 to be welded.

[0057] Furthermore, the fixing rod 314 is inserted into the positioning hole 222 of the positioning structure 22 along the first direction X. The positioning hole 222 can limit the fixing rod 314 in the second direction Y and the third direction Z, preventing the fixing plate 31 from moving in the second direction Y and the third direction Z, thus ensuring the stability of the fixing between the limiting member 10 and the fixing member 30.

[0058] like Figure 4 As shown in the welding fixing device of this application embodiment, the material of the bearing plate 21 includes aluminum or graphite.

[0059] In practice, the support plate 21 is made of materials that facilitate heat transfer, such as aluminum or graphite. This ensures that the support plate 21 has good heat transfer performance. During the welding of the first workpiece 110 and the second workpiece 120, heat can be transferred from the support plate 21 to the second workpiece 120, and then to the solder between the second workpiece 120 and the first workpiece 110, melting the solder and completing the welding. Therefore, the aluminum or graphite support plate 21 facilitates heat transfer, achieving the desired welding effect between the first workpiece 110 and the second workpiece 120, and improving welding stability.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0061] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A welding fixture, characterized by, include: The limiting member (10) includes a plurality of limiting holes (11) through which a first welding workpiece (110) is disposed along a first direction (X), the limiting holes (11) being used to limit the first welding workpiece (110) passing through them; The carrier (20) includes a carrier plate (21) and a plurality of positioning structures (22) disposed on the surface of the carrier plate (21), wherein the carrier plate (21) and the plurality of positioning structures (22) can define an installation space (23) for stacking and installing the second weldment (120) and the limiting member (10); The fastener (30) is detachably connected to one end of the positioning structure (22) away from the bearing plate (21) for fixing the limiting member (10), the first weldment (110) and the second weldment (120) in the first direction (X).

2. The welding fixture of claim 1, wherein, The fixing member (30) includes a fixing plate (31) and a plurality of pressing blocks (32). The fixing plate (31) is detachably connected to the positioning structure (22). The pressing blocks (32) are movably mounted on the fixing plate (31) along the first direction (X) for pressing the first workpiece to be welded (110) onto the surface of the second workpiece to be welded (120).

3. The welding fixture of claim 2, wherein, The fixing plate (31) has a plurality of through holes (311) arranged along the first direction (X), and the plurality of through holes (311) are arranged in a one-to-one correspondence with the plurality of limiting holes (11). The pressing block (32) is slidably inserted into the through holes (311) along the first direction (X).

4. The welding fixture of claim 3, wherein, The pressing block (32) includes a limiting part (321) and a pressing part (322) connected to each other. The limiting part (321) is located on the side of the fixing plate (31) away from the carrier (20), and the projection of the limiting part (321) on the fixing plate (31) completely covers the projection of the corresponding through hole (311) on the fixing plate (31). The pressing part (322) extends along the first direction (X) and is slidably inserted into the through hole (311).

5. The welding fixture of claim 1, wherein, The limiting hole (11) includes welding hole segments (111) and limiting hole segments (112) arranged sequentially along the second direction (Y). Adjacent welding hole segments (111) along the second direction (Y) are connected by the limiting hole segments (112). The width of the limiting hole segment (112) in the third direction (Z) is smaller than the width of the welding hole segment (111) in the third direction (Z). The welding hole segment (111) is used to avoid the welding parts of the first workpiece to be welded (110) and the second workpiece to be welded (120). The limiting hole segment (112) is used to limit the first workpiece to be welded (110) in the second direction (Y) and the third direction (Z).

6. The welding fixture of claim 1, wherein, The positioning structure (22) includes two positioning parts (221) connected at an inclined angle, and the two positioning parts (221) are respectively used to abut against different side walls of the second workpiece to be welded (120).

7. The welding fixture of claim 6, wherein, The limiting member (10) further includes a plurality of support portions (12) protruding from the surface. The plurality of support portions (12) surround the periphery of the plurality of limiting holes (11), and the plurality of support portions (12) are provided in a one-to-one correspondence with the plurality of positioning structures (22). Each support portion (12) abuts against the two positioning portions (221) corresponding to the positioning structure (22).

8. The welding fixture of claim 2, wherein, Each of the positioning structures (22) has a positioning hole (222) recessed toward the carrier (20) along the first direction (X), and the fixing plate (31) and the carrier (20) are positioned and engaged through the positioning holes (222) on the multiple positioning structures (22).

9. The welding fixture of claim 8, wherein, The fixing plate (31) has a plurality of fixing parts (312), and the plurality of fixing parts (312) are provided one-to-one with the plurality of positioning structures (22). The fixing part (312) includes a fixing block (313) and a fixing rod (314). The fixing rod (314) protrudes from the surface of the fixing block (313) along the first direction (X), and the fixing rod (314) is used to insert and cooperate with the positioning hole (222) of the corresponding positioning structure (22).

10. The welding fixture of claim 1, wherein, The material of the support plate (21) includes aluminum or graphite.

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