Welding positioning auxiliary tool

Abstract

The utility model provides a welding location auxiliary tooling, including base station, first location subassembly and second location subassembly, first location subassembly includes first location seat and first fixed piece, first location seat is provided on the base station, the upper end face of first location seat is provided with first profiling groove along the vertical direction, second location seat is provided with second profiling groove along the vertical direction. The first profiling groove is used for limiting the strain gauge assembly; the first fixing piece is detachably connected with the first positioning seat; the second positioning assembly comprises a second positioning seat and a second fixing piece, the second positioning seat is arranged on the base table and located on one side of the first positioning seat, and an extension part is formed on the side, close to the first positioning seat, of the second positioning seat; and the extension part is located above the first positioning seat, the extension part is provided with a second profiling groove, and the second profiling groove is used for positioning a part of the structure of the flexible circuit board, so that the welding spots of the flexible circuit board can be correspondingly contacted with the welding spots of the strain gauge assembly. The utility model aims to improve the welding precision of the strain gauge and the flexible circuit board and ensure the product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a welding positioning auxiliary tool. Background Art

[0002] Currently, active capacitive pens with pressure sensitivity all use pressure sensor chips to detect changes in pressure and convert pressure into voltage values. When manufacturing the pressure sensor chip, the strain gauge assembly needs to be welded to the flexible printed circuit board (FPC).

[0003] In the prior art, when welding a strain gauge and a flexible circuit board, it is usually necessary to use a positioning auxiliary tool to pre-position the strain gauge assembly and the flexible circuit board to ensure that the solder points of the strain gauge assembly and the solder points of the flexible circuit board pads are accurately aligned, thereby ensuring the accuracy and quality of welding.

[0004] However, since the positioning jig is easily shaken or loosened by external forces during the welding process, causing the strain gauge pads or the flexible circuit board pads to shift, manual repeated alignment is often required, which not only reduces the efficiency of the welding operation, but also affects the welding effect of the strain gauge and the flexible circuit board. Utility Model Content

[0005] The main purpose of the utility model is to provide a welding positioning auxiliary tooling, aiming to improve the welding accuracy of strain gauges and flexible circuit boards and ensure product quality.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes a welding positioning auxiliary tool, comprising:

[0007] abutment;

[0008] a first positioning assembly, the first positioning assembly comprising a first positioning seat and a first fixing member, the first positioning seat being arranged on the base, the upper end surface of the first positioning seat being provided with a first profiling groove arranged in a vertical direction, the first profiling groove being used for limiting the strain gauge assembly; the first fixing member being detachably connected to the first positioning seat, and being used for fixing the strain gauge assembly located in the first profiling groove; and

[0009] A second positioning assembly, the second positioning assembly includes a second positioning seat and a second fixing member, the second positioning seat is arranged on the base and located on one side of the first positioning seat, and an extension portion is formed on the side of the second positioning seat close to the first positioning seat; the extension portion is located above the first positioning seat, and the extension portion is provided with a second profiling groove, and the second profiling groove is used to position a partial structure of the flexible circuit board so that the solder joints of the flexible circuit board can contact the corresponding solder joints of the strain gauge assembly; the second fixing member is detachably connected to the extension portion, and is used to fix the flexible circuit board located in the second profiling groove.

[0010] Optionally, the second positioning assembly further includes an adjustment platform, and the adjustment platform includes:

[0011] a base, the base being disposed on the base; and

[0012] The movable seat comprises a transverse seat and a longitudinal seat, wherein the transverse seat is movably mounted on the upper end surface of the base along the transverse direction, and the longitudinal seat is movably mounted on the upper end surface of the transverse seat along the longitudinal direction, and the second positioning seat is detachably mounted on the upper end surface of the longitudinal seat.

[0013] Optionally, the second positioning component further includes:

[0014] A coarse transverse adjustment mechanism, the coarse transverse adjustment mechanism comprising a transverse fixing plate and a transverse adjustment rod, the transverse fixing plate is arranged on a side of the base extending in the transverse direction, the transverse fixing plate is provided with a transverse adjustment groove extending in the transverse direction, the transverse adjustment rod passes through the transverse adjustment groove to be connected to a side of the transverse seat close to the transverse fixing plate, and the transverse adjustment rod can move in the transverse direction in the transverse adjustment groove; and / or

[0015] A longitudinal movement coarse adjustment mechanism, the longitudinal movement coarse adjustment mechanism includes a longitudinal movement fixing plate and a longitudinal movement adjustment rod, the longitudinal movement fixing plate is arranged on the side of the transverse movement seat extending along the longitudinal direction, the longitudinal movement fixing plate is provided with a longitudinal movement adjustment groove extending along the longitudinal direction, the longitudinal movement adjustment rod passes through the longitudinal movement adjustment groove to be connected to a side of the longitudinal movement seat close to the longitudinal movement fixing plate, and the longitudinal movement adjustment rod can move longitudinally in the longitudinal movement adjustment groove.

[0016] Optionally, the second positioning assembly also includes a fine-tuning mechanism, which includes two push rod assemblies, and the two push rod assemblies are respectively arranged on the base and the transverse movement seat; the push rod assembly arranged on the base is used to drive the transverse movement seat to move in the transverse direction; the push rod assembly arranged on the transverse movement seat is used to drive the longitudinal movement seat to move in the longitudinal direction.

[0017] Optionally, the ejector assembly includes a micrometer assembly.

[0018] Optionally, the second positioning assembly further comprises a transverse sliding structure, wherein the transverse sliding structure comprises a transverse sliding rail and a transverse sliding groove that are slidably matched, wherein one of the transverse sliding rail and the transverse sliding groove is arranged on the base, and the other is arranged on the transverse seat; and / or

[0019] The second positioning assembly also includes a longitudinal sliding structure, which includes a longitudinal sliding rail and a longitudinal sliding groove that are slidably matched. One of the longitudinal sliding rail and the longitudinal sliding groove is arranged on the transverse seat, and the other is arranged on the longitudinal seat.

[0020] Optionally, the first profiling groove is formed on a side of the first positioning seat away from the second positioning seat, the first profiling groove forms a notch for exposing the strain gauge assembly on an upper end surface of the first positioning seat, and the first profiling groove forms a mounting opening for exposing the strain gauge assembly on a side away from the second positioning seat;

[0021] The first fixing member is a pressure plate, which is located on a side of the first positioning seat away from the second positioning seat and correspondingly covers the installation opening, and is used to press the strain gauge assembly located in the first contoured groove.

[0022] Optionally, a side of the pressure plate close to the first positioning seat is formed with an avoidance groove, a groove wall of the avoidance groove is used to abut against the strain gauge assembly, and a side wall of the pressure plate close to the first positioning seat abuts against the first positioning seat.

[0023] Optionally, the extension portion and the second positioning seat are an integrated structure; and / or

[0024] The upper end surface of the extending portion is provided with the second contour groove, and the lower end surface of the extending portion abuts against the upper end surface of the first positioning seat.

[0025] Optionally, the welding positioning auxiliary tooling further includes a detection module, and the detection module is used to detect whether the solder joints of the flexible circuit board are in corresponding contact with the solder joints of the strain gauge assembly.

[0026] The welding positioning auxiliary tooling of the utility model requires an operator to place the strain gauge assembly into a first profiling groove and fix it with a first fixing piece, and then place the flexible circuit board into a second profiling groove and fix it with a second fixing piece. This fixing method can ensure close contact between the strain gauge assembly and the flexible circuit board and the tooling, so that they can maintain a stable position during the welding process. By fixing with the profiling groove and two fixing pieces, a better fixing effect can be provided, accurate alignment during the welding process can be ensured, and movement or loosening can be prevented. While improving the welding quality and connection reliability, the efficiency of the welding operation can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1A structural schematic diagram of an embodiment of a welding positioning auxiliary tool provided by the utility model (with a first positioning member);

[0029] Figure 2 A structural schematic diagram of an embodiment of a welding positioning auxiliary tool provided by the utility model (without the first positioning member);

[0030] Figure 3 for Figure 1 Side view of

[0031] Figure 4 for Figure 1 Side view of.

[0032] Description of Figure Numbers:

[0033]

[0034]

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] Currently, active capacitive pens with pressure sensitivity all use pressure sensor chips to detect changes in pressure and convert pressure into voltage values. When manufacturing the pressure sensor chip, the strain gauge assembly needs to be welded to the flexible printed circuit board (FPC).

[0040] In the prior art, when welding a strain gauge and a flexible circuit board, it is usually necessary to use a positioning auxiliary tool to pre-position the strain gauge assembly and the flexible circuit board to ensure that the solder points of the strain gauge assembly and the solder points of the flexible circuit board pads are accurately aligned, thereby ensuring the accuracy and quality of welding.

[0041] However, since the positioning jig is easily shaken or loosened by external forces during the welding process, causing the strain gauge pads or the flexible circuit board pads to shift, manual repeated alignment is often required, which not only reduces the efficiency of the welding operation, but also affects the welding effect of the strain gauge and the flexible circuit board.

[0042] In view of this, the utility model provides a welding positioning auxiliary tool 1000, which aims to improve the welding accuracy of the strain gauge and the flexible circuit board 200 and ensure product quality.

[0043] See also Figure 1 and Figure 2 The present application discloses a welding positioning auxiliary tool 1000, comprising a base 1, a first positioning assembly 2 and a second positioning assembly 3, wherein the first positioning assembly 2 comprises a first positioning seat 21 and a first fixing member 22, the first positioning seat 21 is arranged on the base 1, and the upper end surface of the first positioning seat 21 is provided with a first profiling groove 211 arranged in a vertical direction, and the first profiling groove 211 is used to limit the strain gauge assembly 100; the first fixing member 22 is detachably connected to the first positioning seat 21, and is used to fix the strain gauge assembly 100 located in the first profiling groove 211; the second positioning assembly 3 comprises a second positioning seat 31 and a first fixing member 22; Two fixing members 32, the second positioning seat 31 is arranged on the base 1 and is located on one side of the first positioning seat 21, and an extension portion 311 is formed on the side of the second positioning seat 31 close to the first positioning seat 21; the extension portion 311 is located above the first positioning seat 21, and the extension portion 311 is provided with a second profiling groove 312, and the second profiling groove 312 is used to position a part of the structure of the flexible circuit board 200 so that the solder joints of the flexible circuit board 200 can contact with the corresponding solder joints of the strain gauge assembly 100; the second fixing member 32 is detachably connected to the extension portion 311, and is used to fix the flexible circuit board 200 located in the second profiling groove.

[0044] The welding positioning auxiliary tool 1000 of the utility model requires an operator to place the strain gauge assembly into the first profiling groove 211 and fix it with the first fixing piece 22, and then place the flexible circuit board 200 into the second profiling groove 312 and fix it with the second fixing piece 32. This fixing method can ensure the close contact between the strain gauge assembly 100 and the flexible circuit board 200 and the tooling, so that they maintain a stable position during the welding process. By fixing with the profiling groove and two fixing pieces, a better fixing effect can be provided, which can ensure accurate alignment during the welding process and prevent movement or loosening. While improving the welding quality and connection reliability, the efficiency of the welding operation can also be improved.

[0045] See also Figure 3 Considering that each flexible circuit board 200 or strain gauge assembly 100 may have slight differences in shape or size due to processing errors, it is not possible to ensure that the alignment is successful once when aligning the solder joints. To solve the above problem, in one embodiment of the present application, the second positioning assembly 3 also includes an adjustment platform, the adjustment platform includes a base 33 and a moving seat, the base 33 is arranged on the base, the moving seat includes a transverse seat 332 and a longitudinal seat 333, the transverse seat 332 is movably installed on the upper end surface of the base 33 in the transverse direction, the longitudinal seat 333 is movably installed on the upper end surface of the transverse seat 332 in the longitudinal direction, and the second positioning seat 31 is detachably installed on the upper end surface of the longitudinal seat 333. By providing the transverse seat 332 and the longitudinal seat 333, the flexible circuit board 200 arranged on the extension part 311 can be moved in the transverse and longitudinal directions, so that the solder joints of the flexible circuit board 200 can be moved left and right, front and back relative to the solder joints of the strain assembly, so as to align the solder joints of the flexible circuit board 200 with the solder joints of the strain gauge assembly 100.

[0046] Furthermore, in order to facilitate the adjustment of the position of the flexible circuit board 200, in one embodiment of the present application, the second positioning assembly 3 also includes a transverse coarse adjustment mechanism 34, the transverse coarse adjustment mechanism 34 includes a transverse fixing plate 341 and a transverse adjustment rod 342, the transverse fixing plate 341 is arranged on the side of the base 33 extending in the transverse direction, the transverse fixing plate 341 is provided with a transverse adjustment groove 3411 extending in the transverse direction, the transverse adjustment rod 342 is penetrated by the transverse adjustment groove 3411 to be connected with the side of the transverse seat 332 close to the transverse fixing plate 341, and the transverse adjustment rod 342 can be adjusted in the transverse adjustment groove 3411. In one embodiment of the present application, the second positioning assembly 3 further includes a longitudinal coarse adjustment mechanism 35, which includes a longitudinal fixing piece 351 and a longitudinal adjustment rod 352. The longitudinal fixing piece 351 is arranged on the side of the transverse displacement seat 332 extending along the longitudinal direction. The longitudinal fixing piece 351 is provided with a longitudinal adjustment slot 3511 extending along the longitudinal direction. The longitudinal adjustment rod 352 passes through the longitudinal adjustment slot 3511 to connect with a side of the longitudinal displacement seat 333 close to the longitudinal fixing piece 351. The longitudinal adjustment rod 352 can move longitudinally in the longitudinal adjustment slot 3511. In another embodiment, the second positioning assembly 3 further includes a transverse coarse adjustment mechanism 34 and a longitudinal coarse adjustment mechanism 35. The setting of the coarse adjustment mechanism can help the operator quickly perform coarse alignment between the solder joints of the flexible circuit board 200 and the solder joints of the strain gauge assembly 100. By adjusting the transverse coarse adjustment mechanism 34 or the longitudinal coarse adjustment mechanism 35, the position of the solder joint can be adjusted during the welding process to ensure the accuracy and quality of welding. In this way, the operator can perform welding work more conveniently and improve work efficiency and accuracy.

[0047] In order to facilitate the operator to make minor adjustments and alignments of the solder joints, in one embodiment of the present application, the second positioning assembly 3 also includes a fine adjustment mechanism, which includes two push rod assemblies 36, which are respectively arranged on the base 33 and the transverse displacement seat 332; the push rod assembly 36 arranged on the base 33 is used to drive the transverse displacement seat 332 to move in the transverse direction; the push rod assembly 36 arranged on the transverse displacement seat 332 is used to drive the longitudinal displacement seat 333 to move in the longitudinal direction. Different from the transverse coarse adjustment mechanism 34, the fine adjustment mechanism has higher precision and flexibility, and can make minor position adjustments to ensure the precise alignment of the solder joints. The operator can adjust the push rods of the push rod assembly 36 to achieve the translation of the positions of the transverse displacement seat 332 and the longitudinal displacement seat 333, so as to accurately adjust the solder joint position of the flexible circuit board 200 so that it is completely aligned with the solder joint of the corresponding strain gauge assembly 100. By combining the transverse coarse adjustment mechanism 34, the longitudinal coarse adjustment mechanism 35 and the fine adjustment mechanism, the precise alignment of the solder joints and the components can be achieved, and the welding quality and work efficiency can be improved. Of course, in another embodiment of the present application, the fine-tuning mechanism may also adopt a mechanical structure such as a fine-motion screw, and adjustment is performed by rotating a knob on the screw.

[0048] See also Figure 4 In order to ensure the adjustment accuracy, in one embodiment of the present application, the push rod assembly 36 includes a micrometer assembly 36a. The micrometer assembly 36a includes a micrometer mounting seat and a micrometer sleeved on the micrometer mounting seat. The micrometer mounting seat forms the mounting seat of the push rod assembly 36, and the micrometer forms the push rod. When it is necessary to adjust the position of the lateral displacement seat 332 or the longitudinal displacement seat 333, it is only necessary to rotate the micrometer, and one end of the micrometer will abut against one side of the lateral displacement seat 332 or the longitudinal displacement seat 333 to push the lateral displacement seat 332 or the longitudinal displacement seat 333 to move toward the side where the micrometer extends, so as to achieve the purpose of adjusting the position. Due to the high precision of the micrometer, the lateral displacement seat 332 or the longitudinal displacement seat 333 can be adjusted more accurately, thereby improving the adjustment precision of the tooling.

[0049] To facilitate the sliding of the transverse seat 332 on the base 33, in one embodiment of the present application, the second positioning assembly 3 further includes a transverse sliding structure 37, which includes a transverse sliding rail 371 and a transverse sliding groove 372 that are slidably matched, wherein one of the transverse sliding rail 371 and the transverse sliding groove 372 is provided on the base 33, and the other is provided on the transverse seat 332. Specifically, the transverse sliding rail 371 is formed at a section protruding outwardly at one end of the base 33 close to the transverse seat 332, and the transverse sliding groove 372 is formed at an end concave inwardly at one end of the transverse seat 332 close to the base 33. The transverse sliding groove 372 extends in a transverse direction. During the sliding process, the transverse sliding rail 371 is embedded in the transverse sliding groove 372 and moves along the extension direction of the transverse sliding groove 372. In other embodiments, the transverse slide groove 372 is arranged on the base 33, and the transverse slide rail 371 is arranged on the transverse seat 332. The matching relationship is the same as above. The transverse slide rail 371 and the transverse slide groove 372 can also be replaced by pulleys and guide grooves, which have better sliding performance.

[0050] In order to facilitate the sliding of the longitudinal seat 333 on the transverse seat 332, the second positioning assembly 3 further includes a longitudinal sliding structure 38, which includes a longitudinal sliding rail 381 and a longitudinal sliding groove 382 that are slidably matched, wherein one of the longitudinal sliding rail 381 and the longitudinal sliding groove 382 is provided on the transverse seat 332, and the other is provided on the longitudinal seat 333. Specifically, the longitudinal sliding rail 381 is formed at a section protruding outwards at one end of the transverse seat 332 close to the longitudinal seat 333, and the longitudinal sliding groove 382 is formed at an end concave inwards at one end of the longitudinal seat 333 close to the transverse seat 332. The longitudinal sliding groove 382 extends in the transverse direction. During the sliding process, the longitudinal sliding rail 381 is embedded in the longitudinal sliding groove 382 and moves along the extension direction of the longitudinal sliding groove 382. In other embodiments, the longitudinal slide groove 382 is arranged on the transverse movement seat 332, and the longitudinal slide rail 381 is arranged on the longitudinal movement seat 333. The matching relationship is the same as above. The longitudinal slide rail 381 and the longitudinal slide groove 382 can also be replaced by pulleys and guide grooves, which have better sliding performance.

[0051] In order to facilitate fixing the strain gauge assembly 100 in the first profiling groove 211, in one embodiment of the present application, the first profiling groove 211 is provided on the side of the first positioning seat 21 away from the second positioning seat 31, and the first profiling groove 211 is formed with a notch 3121 for supplying the strain gauge assembly 100 on the upper end surface of the first positioning seat 21, and the first profiling groove 211 is formed with a mounting opening 3122 for supplying the strain gauge assembly 100 on the side away from the second positioning seat 31; the first fixing member 22 is a pressing plate 22a, which is located on the side of the first positioning seat 21 away from the second positioning seat 31 and covers the mounting opening 3122, and the pressing plate 22a is used to press the strain gauge assembly 100 located in the first profiling groove 211. By applying appropriate pressure, the strain gauge assembly 100 is firmly fixed in the first profiling groove 211, so that the strain gauge assembly 100 can be ensured to be in close contact with the groove wall of the first profiling groove 211, thereby achieving accurate positioning and fixing. The pressing plate 22a is usually made of a suitable material and has sufficient rigidity and flatness to ensure a good pressing effect. By using the pressing plate 22a, the stability and reliability of the position of the strain gauge assembly 100 can be ensured, thereby improving the welding accuracy.

[0052] In one embodiment of the present application, a side of the pressing plate 22a close to the first positioning seat 21 is formed with an avoidance groove 221, and the groove wall of the avoidance groove 221 is used to abut against the strain gauge assembly 100, and the side wall of the pressing plate 22a close to the first positioning seat 21 abuts against the first positioning seat 21. This can ensure that there is sufficient contact between the strain gauge assembly 100 and the pressing plate 22a, providing a more stable and reliable fixing effect. At the same time, the side wall of the pressing plate 22a close to the first positioning seat 21 will also abut against the first positioning seat 21, further enhancing the fixing effect. This design can ensure that the pressing plate 22a remains stable when pressing the strain gauge assembly 100, avoiding looseness or displacement, thereby further ensuring welding accuracy.

[0053] Furthermore, in an embodiment of the present application, the extension portion 311 and the second positioning seat 31 are an integrated structure. This means that the extension portion 311 and the second positioning seat 31 are connected together to form a whole, and this integrated structure can provide better stability and rigidity. At the same time, the integrated structure can also reduce looseness and movement between components, thereby improving the reliability and accuracy of the connection.

[0054] In one embodiment of the present application, the upper end surface of the extension portion 311 is provided with a second contoured groove 312, and the lower end surface of the extension portion 311 abuts against the upper end surface of the first positioning seat 21, thereby preventing the solder joints of the flexible circuit board 200 from shifting or deviating in the vertical direction.

[0055] In one embodiment of the present application, the welding positioning auxiliary tooling 1000 also includes a detection module, which is used to detect whether the solder joints of the flexible circuit board 200 and the solder joints of the strain gauge assembly 100 are in corresponding contact. If the solder joints are not in correct corresponding contact, the operator can adjust the welding position or repair the welding problem in time through the detection module to ensure the quality of the solder joints and the reliability of the connection. The detection module can be a sensor or a CCD detection camera. During welding, the position of the second positioning seat 31 is preliminarily adjusted through the coarse adjustment mechanism, and then the welding auxiliary positioning tooling is placed under the CCD detection camera. By adjusting the fine adjustment mechanism, the solder joints of the flexible circuit board 200 and the strain gauge assembly 100 are aligned; finally, welding is performed using a pressure welding device, and the appearance of the solder joints is detected again using the CCD detection camera to ensure welding accuracy.

[0056] It should be added that in one embodiment of the present application, the second fixing member 32 is a locking screw, by which the flexible circuit board 200 is fixed in the second contoured groove 312, and the flexible circuit board 200 is clamped by tightening the locking screw. This design can ensure close contact between the flexible circuit board 200 and the second contoured groove 312, providing stable support and fixation. By adjusting the tightness of the locking screw, the flexible circuit board 200 can be accurately fixed to meet different welding requirements, ensuring welding quality and connection reliability. In other embodiments, the second fixing member 32 can also be a clamp or a clamping block.

[0057] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A welding positioning auxiliary tool, characterized in that: include: abutment; a first positioning assembly, the first positioning assembly comprising a first positioning seat and a first fixing member, the first positioning seat being arranged on the base, the upper end surface of the first positioning seat being provided with a first profiling groove arranged in a vertical direction, the first profiling groove being used for limiting the strain gauge assembly; the first fixing member being detachably connected to the first positioning seat, and being used for fixing the strain gauge assembly located in the first profiling groove; as well as A second positioning assembly, the second positioning assembly includes a second positioning seat and a second fixing member, the second positioning seat is arranged on the base and located on one side of the first positioning seat, and an extension portion is formed on the side of the second positioning seat close to the first positioning seat; the extension portion is located above the first positioning seat, and the extension portion is provided with a second profiling groove, and the second profiling groove is used to position a partial structure of the flexible circuit board so that the solder joints of the flexible circuit board can contact the corresponding solder joints of the strain gauge assembly; the second fixing member is detachably connected to the extension portion, and is used to fix the flexible circuit board located in the second profiling groove.

2. The welding positioning auxiliary tooling according to claim 1, characterized in that: The second positioning assembly further includes an adjustment platform, and the adjustment platform includes: a base, the base being disposed on the base; and The movable seat comprises a transverse seat and a longitudinal seat, wherein the transverse seat is movably mounted on the upper end surface of the base along the transverse direction, and the longitudinal seat is movably mounted on the upper end surface of the transverse seat along the longitudinal direction, and the second positioning seat is detachably mounted on the upper end surface of the longitudinal seat.

3. The welding positioning auxiliary tooling according to claim 2, characterized in that: The second positioning component also includes: A coarse transverse adjustment mechanism, the coarse transverse adjustment mechanism comprising a transverse fixing plate and a transverse adjustment rod, the transverse fixing plate is arranged on a side of the base extending in the transverse direction, the transverse fixing plate is provided with a transverse adjustment groove extending in the transverse direction, the transverse adjustment rod passes through the transverse adjustment groove to be connected to a side of the transverse seat close to the transverse fixing plate, and the transverse adjustment rod can move in the transverse direction in the transverse adjustment groove; and / or A longitudinal movement coarse adjustment mechanism, the longitudinal movement coarse adjustment mechanism includes a longitudinal movement fixing plate and a longitudinal movement adjustment rod, the longitudinal movement fixing plate is arranged on the side of the transverse movement seat extending along the longitudinal direction, the longitudinal movement fixing plate is provided with a longitudinal movement adjustment groove extending along the longitudinal direction, the longitudinal movement adjustment rod passes through the longitudinal movement adjustment groove to be connected to a side of the longitudinal movement seat close to the longitudinal movement fixing plate, and the longitudinal movement adjustment rod can move longitudinally in the longitudinal movement adjustment groove.

4. The welding positioning auxiliary tooling according to claim 3, characterized in that: The second positioning assembly also includes a fine-tuning mechanism, which includes two push rod assemblies, which are respectively arranged on the base and the transverse displacement seat; the push rod assembly arranged on the base is used to drive the transverse displacement seat to move in the transverse direction; the push rod assembly arranged on the transverse displacement seat is used to drive the longitudinal displacement seat to move in the longitudinal direction.

5. The welding positioning auxiliary tooling according to claim 4, characterized in that: The ejector assembly includes a micrometer assembly.

6. The welding positioning auxiliary tool as claimed in any one of claims 2 to 5, characterized in that: The second positioning assembly further comprises a transverse sliding structure, wherein the transverse sliding structure comprises a transverse sliding rail and a transverse sliding groove that are slidably matched, wherein one of the transverse sliding rail and the transverse sliding groove is arranged on the base, and the other is arranged on the transverse seat; and / or The second positioning assembly also includes a longitudinal sliding structure, which includes a longitudinal sliding rail and a longitudinal sliding groove that are slidably matched. One of the longitudinal sliding rail and the longitudinal sliding groove is arranged on the transverse seat, and the other is arranged on the longitudinal seat.

7. The welding positioning auxiliary tool as claimed in claim 1, characterized in that: The first profiling groove is formed on a side of the first positioning seat away from the second positioning seat, the first profiling groove is formed with a notch for the strain gauge assembly to be exposed on the upper end surface of the first positioning seat, and the first profiling groove is formed with a mounting opening for the strain gauge assembly to be exposed on a side away from the second positioning seat; The first fixing member is a pressure plate, which is located on a side of the first positioning seat away from the second positioning seat and correspondingly covers the installation opening, and is used to press the strain gauge assembly located in the first contoured groove.

8. The welding positioning auxiliary tool as claimed in claim 7, characterized in that: A side of the pressure plate close to the first positioning seat is formed with an avoidance groove, the groove wall of the avoidance groove is used to abut against the strain gauge assembly, and the side wall of the pressure plate close to the first positioning seat abuts against the first positioning seat.

9. The welding positioning auxiliary tool as claimed in claim 1, characterized in that: The extension portion and the second positioning seat are an integrated structure; and / or The upper end surface of the extending portion is provided with the second contour groove, and the lower end surface of the extending portion abuts against the upper end surface of the first positioning seat.

10. The welding positioning auxiliary tool as claimed in claim 1, characterized in that: The welding positioning auxiliary tool also includes a detection module, which is used to detect whether the solder joints of the flexible circuit board are in corresponding contact with the solder joints of the strain gauge assembly.

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