An integrated tooling jig

Abstract

The utility model discloses an integrated tooling jig relates to mechanical jig field, including base, limit board, upper cover and locking piece, the base is equipped with multiple work stations for placing power module and multiple first positioning end for positioning power module, the first positioning end surrounds the work station and is arranged, the limit board is equipped with the second positioning end for positioning power module and multiple limit hole for positioning power module pin needle, the upper cover is located the top of limit board, the upper cover with base positioning connection, the locking piece locks the connection upper cover with base, makes multiple power module be pressed tightly between upper cover and base, the utility model discloses can reduce the position degree of power module signal pin needle and the warping degree of power module.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical fixture technology, and specifically relates to an integrated tooling fixture. Background Technology

[0002] During the production of existing power modules, the signal pins are prone to shifting as the molecules solidify during the epoxy resin bonding and curing process, affecting the product dimensions of the power module.

[0003] Furthermore, the expansion and contraction stress generated during the epoxy curing process of the power module's heat dissipation base plate can easily cause deformation, affecting the product size of the power module and resulting in low product stability. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated tooling fixture to solve one or more technical problems existing in the prior art.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: This utility model discloses an integrated tooling fixture, comprising: The base has multiple workstations for placing power modules and multiple first positioning ends for positioning the power modules, the first positioning ends being arranged around the workstations; A limiting plate, wherein the limiting plate is provided with a second positioning end for positioning the power module and a plurality of limiting holes for positioning the pins of the power module; The upper cover plate is disposed above the limiting plate and is positioned and connected to the base. A locking element securely connects the upper cover plate and the base, thereby pressing multiple power modules between the upper cover plate and the base.

[0006] The present invention has at least the following beneficial effects: the power module is placed in the workstation and fixed relative to the base via the first positioning end. The limiting plate is fixed relative to the power module via the second positioning end. The limiting plate has multiple limiting holes corresponding one-to-one with multiple pins. The pins pass through the limiting holes, preventing the pins of the power module from shifting due to molecular solidification, reducing the positional error of the pins, reducing assembly interference with the drive board, and improving the product competitiveness of the power module.

[0007] The top cover and the base are positioned and connected to fix them relatively. The locking device locks the top cover and the base, so that the top cover presses the power module on the base. This prevents the heat dissipation base plate of the power module from deforming due to expansion stress and contraction stress during the epoxy curing process, reduces the warpage of the heat dissipation base plate of the power module, and improves the dimensional stability of the power module.

[0008] As a further improvement to the above technical solution, the limiting hole includes a contact area for contacting the non-functional area of ​​the pin and a guide area for guiding the pin insertion, wherein the contact area is located above the guide area.

[0009] As a further improvement to the above technical solution, the integrated tooling fixture is configured such that, when used for crimping power modules, the vertical length of the contact area is greater than the vertical length of the guide area.

[0010] As a further improvement to the above technical solution, the integrated tooling fixture is configured such that, when used for welding power modules, the vertical length of the contact area is less than or equal to the vertical length of the guide area.

[0011] As a further improvement to the above technical solution, the upper cover plate is provided with a plurality of clamping pins on the side facing the base for abutting the power module.

[0012] As a further improvement to the above technical solution, the clamping pin is detachably connected to the upper cover plate.

[0013] As a further improvement to the above technical solution, the power module is provided with a first positioning post and a second positioning post, the first positioning end being a first positioning hole for fitting the first positioning post, and the second positioning end being a second positioning hole for fitting the second positioning post.

[0014] As a further improvement to the above technical solution, the locking component is provided with multiple locking screws, and the base is provided with multiple locking holes for threaded connection of the multiple locking screws.

[0015] As a further improvement to the above technical solution, the plurality of locking holes include a central locking hole, a first locking hole, and a second locking hole. The central locking hole is located in the middle of the base. There are two first locking holes, which are arranged on both sides of the central locking hole along a direction parallel to the short end of the power module. There are four second locking holes, which are distributed in a rectangular array along the edge of the base.

[0016] As a further improvement to the above technical solution, the base is provided with a third positioning post, and the upper cover is provided with a third positioning hole, which is fitted inside the third positioning post. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of the integrated tooling fixture provided in this embodiment of the utility model; Figure 2 This is a schematic diagram showing the connection between the base and the power module provided in this embodiment of the utility model; Figure 3 This is an exploded view of the base and power module provided in this embodiment of the utility model; Figure 4 This is a connection diagram of the base, power module, and limiting plate provided in this embodiment of the utility model; Figure 5 This is an exploded view of the integrated tooling fixture provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the structure of the limiting plate for welding pins provided in this embodiment of the utility model; Figure 7 This is a schematic diagram of the structure of the limiting plate for crimping pins provided in this embodiment of the utility model.

[0018] The following labels are shown in the attached diagram: 100. Integrated tooling fixture; 200. Base; 210. Workstation; 220. First positioning end; 230. Locking hole; 231. Center locking hole; 232. First locking hole; 233. Second locking hole; 240. Third positioning post; 300, Limiting plate; 310, Second positioning end; 320, Limiting hole; 321, Contact area; 322, Guide area; 400. Top cover plate; 410. Clamping pin; 420. Third positioning hole; 500. Locking components; 600, Power module; 610, Pin; 611, Functional area; 612, Non-functional area; 620, Heat sink base plate; 630, First positioning post; 640, Second positioning post. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 7 The following are several embodiments of the integrated tooling fixture of this utility model.

[0024] like Figures 1 to 7 As shown, the integrated tooling fixture 100 of this utility model embodiment includes a base 200, a limiting plate 300, an upper cover plate 400, and a locking component 500.

[0025] It is understandable that the base 200 has multiple workstations 210 and multiple first positioning ends 220, such as Figure 3 As shown. Specifically, the workstation 210 is recessed along the upper surface of the base 200, as... Figures 1 to 5 As shown, the lower end of the power module 600 can be placed within the workstation 210. Setting multiple workstations 210 allows the integrated tooling fixture 100 to assemble multiple power modules 600 simultaneously, improving production efficiency. The first positioning end 220 is positioned around the workstation 210 and is used to position the power module 600, preventing incorrect assembly and avoiding movement of the power module 600 relative to the base 200 during production, which would affect production accuracy.

[0026] Understandably, the number of workstations 210 on the base 200 can be adjusted according to production capacity.

[0027] In this embodiment, the base 200 is provided with four workstations 210, which are arranged in a rectangular array on the base 200, such as... Figures 1 to 5 As shown, the integrated tooling fixture 100 can assemble four power modules 600 at once.

[0028] Understandably, the limiting plate 300 is provided with a second positioning end 310 and multiple limiting holes 320, such as Figure 4 and Figure 5As shown. Specifically, the second positioning end 310 is used to position the power module 600, fixing the limiting plate 300 and the power module 600 relative to each other. The limiting holes 320 are used to position the signal pins 610 of the power module 600. The limiting plates 300 correspond one-to-one with the workstations 210, that is, the multiple limiting holes 320 on each limiting plate 300 correspond one-to-one with the pins 610 on the power module 600. When the power module 600 is loaded onto the workstation 210, the limiting plate 300 is placed above the power module 600. At this time, the multiple pins 610 of the power module 600 are respectively inserted into the limiting holes 320. Before the epoxy resin of the power module 600 has cured, the tip of the signal pin 610 of the power module 600 is limited to prevent the signal pin 610 from shifting with the curing of molecules during the epoxy resin bonding process. This ensures the dimensional stability of the power module 600, reduces the positional accuracy of the pin 610 from φ1.5mm to within φ0.5mm, reduces interference with the driver board assembly, and improves the competitiveness of the power module 600.

[0029] Understandably, after multiple limiting plates 300 are placed on top of multiple power modules 600, a top cover plate 400 is placed on top of the base 200 and the power modules 600. The top cover plate 400 is positioned and connected to the base 200, fixing them relatively. The top cover plate 400 is designed according to the structure of the base 200, so that the middle part of the power module 600 is sandwiched between the base 200 and the limiting plates 300, and the edge of the power module 600 is sandwiched between the base 200 and the top cover plate 400. Understandably, the locking component 500 locks the upper cover plate 400 and the base 200 together, clamping them together. The upper cover plate 400 abuts against the edge of the power module 600, pressing the power module 600 between the upper cover plate 400 and the base 200. This allows the integrated tooling fixture 100 to press the heat dissipation base plate 620 of the power module 600 after assembly. During the epoxy resin bonding and curing process, the heat dissipation base plate 620 will not deform due to the expansion and contraction stresses generated during epoxy curing, ensuring the dimensional stability of the power module 600. This reduces the warpage of the heat dissipation base plate 620 from 0.5mm to less than 0.2mm, minimizing interference with the electric drive cooling water channel assembly and improving the competitiveness of the power module 600.

[0030] In this embodiment, the power module 600 is an ACP power module 600.

[0031] Understandably, the limiting hole 320 on the limiting plate 300 can be set according to the signal pin 610 with different structures.

[0032] It is understandable that the limiting hole 320 includes a contact area 321 and a guide area 322, such as Figure 7 As shown. Specifically, the contact area 321 is located above the guide area 322 and the two are connected, as shown. Figure 6 and Figure 7 As shown. The guide area 322 is used to guide the signal pins 610 of the power module 600 into the contact area 321, so that when the limiting plate 300 is placed above the power module 600, multiple pins 610 can be automatically inserted into the limiting hole 320 without repeatedly adjusting the position of the limiting plate 300. When the pin 610 is inserted into the contact area 321 through the guide area 322, the non-functional area 612 of the pin 610 is in contact with the contact area 321 of the limiting hole 320, thereby limiting the pin 610.

[0033] It is understandable that the signal pin 610 includes a functional area 611 and a non-functional area 612, such as... Figure 6 and Figure 7 As shown. Specifically, functional area 611 is the area for crimping or soldering, and non-functional area 612 is connected to contact area 321 for limiting, ensuring that the plating of functional area 611 of signal pin 610 is undamaged.

[0034] In some embodiments, when the integrated tooling fixture 100 is used to crimp the power module 600, the vertical length of the contact area 321 is greater than the vertical length of the guide area 322. Since the surface plating of the crimped pin 610 will be worn during actual use, the conditions for avoiding contact between the functional area 611 of the pin 610 and the contact area 321 can be relaxed as appropriate. Therefore, the guide area 322 can be used only to guide the input of the pin 610, without the need to prevent the functional area 611 of the pin 610 from contacting the wall of the limiting hole 320.

[0035] In other embodiments, when the integrated tooling fixture 100 is used to weld the power module 600, the vertical length of the contact area 321 is less than or equal to the vertical length of the guide area 322. Since the functional area 611 of the pin 610 is generally a region two to four millimeters away from the tip of the pin 610, expanding the guide area 322 can minimize the contact between the functional area 611 and the wall of the limiting hole 320.

[0036] In some embodiments, the upper cover plate 400 may have a downwardly extending protrusion, which is provided corresponding to the power module 600. When the locking member 500 locks the upper cover plate 400 and the base 200, the protrusion abuts against the power module 600.

[0037] In this embodiment, the upper cover plate 400 is provided with a plurality of clamping pins 410 on the side facing the base 200, that is, the clamping pins 410 are located on the lower side of the upper cover plate 400, such as... Figure 1 and Figure 5 As shown, when the locking member 500 locks the upper cover plate 400 and the base 200, the clamping pin 410 abuts against the power module 600, reducing the warpage of the heat dissipation base plate 620 of the power module 600.

[0038] Understandably, one power module 600 corresponds to multiple clamping pins 410. Specifically, the front and rear ends of the power module 600 are located between the upper cover plate 400 and the base 200. The multiple clamping pins 410 are arranged at intervals along the long end of the power module 600 and respectively abut against the front and rear ends of the power module 600, thereby stably abutting the power module 600 against the base 200 from the front and rear directions.

[0039] In this embodiment, the upper cover plate 400 is provided with 32 clamping pins 410, and each power module 600 is provided with 8 clamping pins 410, of which 4 clamping pins 410 abut against the front end of the power module 600 and the other 4 clamping pins 410 abut against the rear end of the power module 600.

[0040] In other embodiments, the clamping pin 410 can also press the limiting plate 300, thereby reducing the warpage of the power module 600 by pressing the power module 600 with the limiting plate 300.

[0041] Understandably, since different power modules 600 have heat dissipation base plates 620 with different thicknesses, in order to improve the applicability of the integrated tooling fixture 100, the clamping pin 410 is detachably connected to the upper cover plate 400, so that the height of the clamping pin 410 can be adjusted according to the thickness of the heat dissipation base plate 620 of different power modules 600.

[0042] In some embodiments, the clamping pin 410 is threadedly connected to the upper cover plate 400. Specifically, by turning the clamping pin 410, the threaded connection length between the clamping pin 410 and the upper cover plate 400 is adjusted, thereby achieving length adjustment of the clamping pin 410. The upper cover plate 400 can also be threadedly removed from the clamping pin 410 to replace it with a clamping pin 410 of different length, thereby achieving length adjustment of the clamping pin 410.

[0043] In other embodiments, the clamping pin 410 is detachably connected to the upper cover plate 400 by means of magnetic attraction or flange.

[0044] In this embodiment, the power module 600 has a first positioning post 630 and a second positioning post 640 on its lower and upper sides. Correspondingly, the first positioning end 220 of the base 200 is a first positioning hole. When the power module 600 is placed on the workstation 210, the first positioning post 630 passes through the first positioning hole, realizing the positioning connection between the base 200 and the power module 600. The second positioning end 310 of the limiting plate 300 is a second positioning hole. When the limiting plate 300 is placed on the power module 600, the second positioning hole is sleeved on the second positioning post 640, realizing the positioning connection between the power module 600 and the limiting plate 300.

[0045] In this embodiment, the power module 600 is provided with two first positioning posts 630 and two second positioning posts 640, each station 210 has two first positioning holes, and each limiting plate 300 has two second positioning holes.

[0046] Understandably, the locking component 500 has multiple locking screws, and the base 200 has locking holes 230 corresponding to the locking screws. The locking holes 230 are threaded holes. After the locking screws pass through the upper cover plate 400, they are threaded into the locking holes 230, thereby realizing the locking connection between the base 200 and the upper cover plate 400, and thus realizing the pressing of the pressure pin 410 on the power module 600.

[0047] In this embodiment, the head structure of the locking screw is an external hexagonal Torx structure. The locking method is manual tightening, primarily used for initial R&D verification and small-batch trial production. If production capacity increases, it can be integrated into an automated machine, adjusted according to the electric screwdriver bit structure, to achieve electric tightening of the locking screw.

[0048] In this embodiment, the plurality of locking holes 230 are provided with seven, including one central locking hole 231, two first locking holes 232 and four second locking holes 233, as follows: Figure 2 As shown. Specifically, the central locking hole 231 is located in the middle of the upper surface of the base 200, and also between the four workstations 210. Two first locking holes 232 are respectively arranged on both sides of the central locking hole 231 along the short end direction of the power module 600, that is, the two first locking holes 232 are respectively located between the left and right workstations 210, and are located in front of and behind the central locking hole 231. Four second locking holes 233 are arranged in a rectangular array and are distributed along the long end direction of the power module 600 on both sides of the base 200, that is, two of the second locking holes 233 are arranged in the front-back direction and are located on the left side of the base 200, and the other two second locking holes 233 are arranged in the front-back direction and are located on the right side of the base 200.

[0049] Understandably, after the upper cover plate 400 is positioned and connected to the base 200, a locking screw is first used to connect the center locking hole 231, then two locking screws are used to connect the first locking hole 232, then two locking screws are used to connect two of the second locking holes 233 diagonally, and finally two locking screws are used to connect the remaining two diagonally opposite second locking holes 233, thus completing the locking connection between the upper cover plate 400 and the base 200.

[0050] This ensures that the top cover 400 will not shift to one side during the locking process, avoiding issues such as the two diagonally opposite second locking holes 233 failing to connect the locking screws and stripping.

[0051] It is understandable that the positioning connection between the base 200 and the upper cover 400 is actually achieved by the base 200 having a third positioning post 240 and the upper cover 400 having a third positioning hole 420. Figure 5 As shown, when the upper cover plate 400 is placed on the base 200 and multiple limiting plates 300, the third positioning hole 420 is fitted into the third positioning post 240.

[0052] In this embodiment, the third positioning post 240 is provided in two and is arranged at a distance along the left and right sides of the base 200. Correspondingly, the upper cover plate 400 is also provided with two third positioning holes 420 arranged at a distance along the left and right sides.

[0053] Working principle: The ACP power module 600 is picked up by mechanical grippers. The first positioning post 630 and the integrated fixture 100 are identified by a 3D camera recognition module. The power module 600 is placed on the integrated fixture 100 by aligning the first positioning post 630 with the first positioning hole of the integrated fixture 100. The limiting plate 300 is picked up by mechanical grippers and placed on the ACP power module 600 by identifying the second positioning hole and the second positioning post 640. The upper cover plate 400 is aligned with the third positioning post 240 of the base 200 and placed on the integrated fixture 100 by mechanical grippers. The locking screws are tightened in sequence. The power module 600 placed on the integrated fixture 100 is placed in an oven for epoxy curing. After curing, the screws are loosened in sequence, and the upper cover plate 400 and the limiting plate 300 are removed. The operation is complete.

[0054] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An integrated tooling fixture, characterized in that, Including: The base has multiple workstations for placing power modules and multiple first positioning ends for positioning the power modules, the first positioning ends being arranged around the workstations; A limiting plate, wherein the limiting plate is provided with a second positioning end for positioning the power module and a plurality of limiting holes for positioning the pins of the power module; The upper cover plate is disposed above the limiting plate and is positioned and connected to the base. A locking element securely connects the upper cover plate and the base, thereby pressing multiple power modules between the upper cover plate and the base.

2. The integrated tooling fixture according to claim 1, characterized in that, The limiting hole includes a contact area for contacting the non-functional area of ​​the pin and a guide area for guiding the pin insertion, with the contact area located above the guide area.

3. The integrated tooling fixture according to claim 2, characterized in that, The integrated tooling fixture is configured such that, when used for crimping power modules, the vertical length of the contact area is greater than the vertical length of the guide area.

4. The integrated tooling fixture according to claim 2, characterized in that, The integrated tooling fixture is configured such that, when used for welding power modules, the vertical length of the contact area is less than or equal to the vertical length of the guide area.

5. The integrated tooling fixture according to claim 1, characterized in that, The upper cover plate is provided with a plurality of clamping pins on the side facing the base for abutting the power module.

6. The integrated tooling fixture according to claim 5, characterized in that, The clamping pin is detachably connected to the upper cover plate.

7. The integrated tooling fixture according to claim 1, characterized in that, The power module is provided with a first positioning post and a second positioning post. The first positioning end is a first positioning hole for fitting the first positioning post, and the second positioning end is a second positioning hole for fitting the second positioning post.

8. The integrated tooling fixture according to claim 1, characterized in that, The locking component has multiple locking screws, and the base has multiple locking holes for threaded connection of the multiple locking screws.

9. The integrated tooling fixture according to claim 8, characterized in that, The plurality of locking holes include a central locking hole, a first locking hole, and a second locking hole. The central locking hole is located in the middle of the base. There are two first locking holes, which are arranged on both sides of the central locking hole along a direction parallel to the short end of the power module. There are four second locking holes, which are distributed in a rectangular array along the edge of the base.

10. The integrated tooling fixture according to claim 1, characterized in that, The base is provided with a third positioning post, and the upper cover is provided with a third positioning hole, which is fitted inside the third positioning post.

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