Copper substrate curvature test fixture

Abstract

The utility model discloses a copper baseboard curvature test frock, and measurement base and measurement module cooperate to use, and measurement module is placed on the top plate top surface of measurement base, and the positioning hole on the measurement base plate of measurement module and the positioning column of top plate of measurement base cooperate to carry out positioning, and then the copper baseboard of waiting for checking is placed on the curvature measurement of multiple support column upper end, and the support column is used for contacting with the copper baseboard, and plays the role of supporting, according to different model copper baseboard, can replace different measurement module, and switching is convenient, and single dial gauge can satisfy the curvature measurement of multiple copper baseboard products, reduces copper baseboard curvature detection cost, and can ensure that copper baseboard curvature measurement point position is same each time, guarantees the measurement precision.

Description

Technical Field

[0001] This utility model relates to tooling, and in particular to a tooling for testing the curvature of a copper substrate. Background Technology

[0002] In the manufacturing and packaging of IGBT modules, the copper substrate plays a crucial role in heat dissipation during the operation of the IGBT module. The curvature of the copper substrate directly affects the heat dissipation efficiency of the finished IGBT module. Therefore, the curvature of the copper substrate is measured and tested. Currently, the curvature of the copper substrate is measured manually using a handheld measuring fixture above the copper substrate. This method has disadvantages such as measurement errors due to inaccurate positioning, damage to the copper substrate caused by the easy tilting of the measuring fixture, and excessive cost due to the need to equip each copper substrate model with a dial indicator. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a copper substrate curvature testing fixture. A single dial indicator can meet the curvature measurement of multiple copper substrate products and ensure that the measurement points are the same each time, thus guaranteeing measurement accuracy.

[0004] To solve the above-mentioned technical problems, the present invention provides a copper substrate curvature testing fixture, which includes a measuring base, a measuring module and a dial indicator;

[0005] The measuring base includes a top plate;

[0006] Positioning posts are fixedly installed at both ends of the upper surface of the top plate;

[0007] A through hole is formed in the center of the top plate;

[0008] The measurement module includes a measurement base plate;

[0009] Corresponding to the positioning posts at the left and right ends of the upper surface of the top plate and the lower through hole in the center of the top plate, the left, right and center of the measuring substrate are provided with two positioning holes and one upper through hole.

[0010] At least three support pillars are formed on the upper side of the measuring substrate; at least one support pillar is located on the left side of the upper through hole, and at least one support pillar is located on the right side of the upper through hole.

[0011] The measuring substrate of the measuring module is mounted on the upper surface of the top plate. The positioning pins at the left and right ends of the upper surface of the top plate are respectively inserted into the positioning holes on the left and right sides of the measuring substrate, and the lower through hole in the center of the top plate is aligned with the upper through hole in the center of the measuring substrate.

[0012] The dial indicator is mounted and fixed on the lower side of the top plate, and the probe of the dial indicator extends upward through the lower through hole in the center of the top plate and the upper through hole in the center of the measuring substrate to the upper side of the measuring substrate.

[0013] The upper end of the dial indicator probe is higher than the upper end of the support column.

[0014] Preferably, the height of the support column is adjustable.

[0015] Preferably, the top plate is fixed with a lower locking buckle on both the front and rear sides;

[0016] Corresponding to the lower latches fixed on the front and rear sides of the top plate, the front and rear sides of the measuring base plate are respectively fixed with upper latches.

[0017] After the measuring base plate of the measuring module is placed on the upper surface of the top plate, the top plate of the measuring base is locked to the measuring base plate of the measuring module by fastening the corresponding lower and upper latches.

[0018] Preferably, the lower and upper latches are made of stainless steel.

[0019] Preferably, at least four positioning pins are formed on the upper side of the measuring substrate;

[0020] Each support column is located within the area enclosed by the locating pins;

[0021] Both positioning holes on the measuring substrate are located outside the area enclosed by the positioning pins.

[0022] Preferably, the upper end of the positioning pin is higher than the upper end of the dial indicator probe.

[0023] Preferably, the locating pin is made of stainless steel;

[0024] The positioning column is made of stainless steel.

[0025] Preferably, a mounting bracket is fixed to the lower side of the top plate of the measuring base;

[0026] The mounting bracket has transverse screw holes;

[0027] The dial indicator body is fixed to the mounting bracket by bolts that engage with the threaded screw holes.

[0028] Preferably, the mounting bracket is I-shaped;

[0029] The dial indicator is fixed to the horizontal plate in the middle of the I-shaped mounting bracket in the left and right directions;

[0030] The front and rear ends of the horizontal plates at both ends of the I-shaped mounting bracket are fixed with lower locking buckles.

[0031] Preferably, the measuring base further includes a base plate;

[0032] The top plate is fixedly installed directly above the bottom plate;

[0033] Both the top plate and the bottom plate are rectangular.

[0034] The four corners of the top plate are fixedly connected to the four corners of the bottom plate by columns.

[0035] This utility model discloses a copper substrate curvature testing fixture, which uses a measuring base and a measuring module together. The measuring module is placed on the top surface of the measuring base. After positioning by the positioning holes on the measuring substrate of the measuring module and the positioning posts on the top surface of the measuring base, the copper substrate to be tested is placed on the top of multiple support posts for curvature measurement. The support posts are used to contact the copper substrate and provide support, which can reduce damage to the copper substrate due to operational errors. The measuring module is a replaceable module. The positioning holes on the left and right sides of the measuring substrate of the measuring module are matched with the positioning posts at the left and right ends of the top surface of the measuring base, which facilitates the assembly of the measuring module with the measuring base and limits the positioning of the measuring substrate of the measuring module. Different measuring modules can be replaced according to different copper substrate models, which is convenient for switching. A single dial indicator can meet the curvature measurement of multiple copper substrate products, reducing the cost of copper substrate curvature testing and ensuring that the measurement points are the same for each copper substrate curvature measurement, thus ensuring measurement accuracy. Attached Figure Description

[0036] To more clearly illustrate the technical solution of this utility model, the drawings used in this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the copper substrate curvature testing fixture of this utility model;

[0038] Figure 2 This is a schematic diagram of the three-dimensional structure of the measuring base of an embodiment of the copper substrate curvature testing fixture of this utility model;

[0039] Figure 3 This is a three-dimensional structural diagram of the measurement module of an embodiment of the copper substrate curvature testing fixture of this utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Measuring base; 11. Top plate; 111. Positioning post; 112. Lower through hole; 12. Base plate; 13. Column; 2. Measuring module; 20. Measuring base plate; 201. Positioning hole; 202. Upper through hole; 204. Support column; 205. Positioning pin; 50. Lower latch; 51. Upper latch; 6. Mounting bracket; 61. Screw hole; 31. Dial indicator probe. Detailed Implementation

[0042] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0043] Example 1

[0044] A copper substrate curvature testing fixture, such as Figure 1 As shown, the copper substrate curvature testing fixture includes a measuring base 1, a measuring module 2, and a dial indicator;

[0045] like Figure 2 As shown, the measuring base 1 includes a top plate 11;

[0046] Positioning posts 111 are fixedly installed at both ends of the upper surface of the top plate 11;

[0047] A through hole 112 is formed in the center of the top plate 11;

[0048] like Figure 2 As shown, the measurement module 2 includes a measurement base plate 20;

[0049] Corresponding to the positioning posts 111 at the left and right ends of the upper surface of the top plate 11 and the lower through hole 112 in the center of the top plate 11, the measuring base plate 20 has two positioning holes 201 on the left, right and center and an upper through hole 202.

[0050] At least three support pillars 204 are formed on the upper side of the measuring substrate 20; at least one support pillar 204 is located on the left side of the upper through hole 202, and at least one support pillar 204 is located on the right side of the upper through hole 202.

[0051] The measuring substrate 20 of the measuring module 2 is assembled on the upper surface of the top plate 11. The positioning pins 111 at the left and right ends of the upper surface of the top plate 11 are respectively inserted into the positioning holes 201 on the left and right sides of the measuring substrate 20, and the lower through hole in the center of the top plate 11 is aligned with the upper through hole 202 in the center of the measuring substrate 20.

[0052] The dial indicator is mounted and fixed on the lower side of the top plate 11, and the probe 31 of the dial indicator extends upward through the lower through hole 112 in the center of the top plate 11 and the upper through hole 202 in the center of the measuring substrate 20 to the upper side of the measuring substrate 20.

[0053] The upper end of the dial indicator probe 31 is higher than the upper end of the support column 204.

[0054] Preferably, the height of the support column 204 is adjustable.

[0055] The copper substrate curvature testing fixture of Embodiment 1 uses a measuring base 1 and a measuring module 2 together. The measuring module 2 is placed on the upper surface of the top plate 11 of the measuring base 1. After positioning by the positioning holes 24 on the measuring substrate 20 of the measuring module 2 and the positioning posts 111 on the top plate 11 of the measuring base 1, the copper substrate to be tested is placed on the upper end of multiple support posts 204 for curvature measurement. The support posts 204 are used to contact the copper substrate and provide support, which can reduce damage to the copper substrate due to operational errors. The measuring module 2 is a replaceable module. The positioning holes 201 on the left and right sides of the measuring substrate 20 of the measuring module 2 are positioned to cooperate with the positioning posts 111 at both ends of the upper surface of the top plate 11 of the measuring base 1, which facilitates the assembly of the measuring module 2 with the measuring base 1 and limits the position of the measuring substrate 20 of the measuring module 2. Different measuring modules can be replaced according to different copper substrate models, which is convenient to switch. A single dial indicator can meet the curvature measurement of multiple copper substrate products, reduce the cost of copper substrate curvature detection, and ensure that the copper substrate curvature measurement points are the same each time, thus ensuring measurement accuracy.

[0056] Example 2

[0057] Based on the copper substrate curvature testing fixture of Embodiment 1, the top plate 11 is fixed with lower locking buckles 50 on its front and rear sides respectively.

[0058] Corresponding to the lower latches 50 fixed on the front and rear sides of the top plate 11, the upper latches 51 are respectively fixed on the front and rear sides of the measuring base plate 20.

[0059] After the measuring base plate 20 of the measuring module 2 is placed on the upper surface of the top plate 11, the top plate 11 of the measuring base 1 and the measuring base plate 20 of the measuring module 2 are locked together by fastening the corresponding lower latch 50 with the upper latch 51.

[0060] Preferably, the lower latch 50 and the upper latch 51 are made of stainless steel.

[0061] In the copper substrate curvature testing fixture of Embodiment 2, the measuring base 1 and the measuring module 2 are interlocked. After the measuring module 2 is placed on the upper surface of the top plate 11 of the measuring base 1, it is locked by a latch.

[0062] Example 3

[0063] Based on the copper substrate curvature testing fixture of Embodiment 1, at least four positioning pins 205 are formed on the upper side of the measuring substrate 20.

[0064] Each support column 204 is located within the area enclosed by each locating pin 205;

[0065] The two positioning holes 201 on the measuring substrate 20 are both located outside the area enclosed by the positioning pins 205.

[0066] Preferably, the upper end of the positioning pin 205 is higher than the upper end of the dial indicator probe 31.

[0067] Preferably, the locating pin 205 is made of stainless steel.

[0068] Preferably, the positioning post 111 is made of stainless steel.

[0069] The copper substrate curvature testing fixture in Example 3 uses a positioning pin 205 to limit the copper substrate, ensuring that the measurement point for each copper substrate curvature measurement is the same and guaranteeing measurement accuracy.

[0070] Example 4

[0071] Based on the copper substrate curvature testing fixture of Embodiment 2, a mounting bracket 6 is fixed on the lower side of the top plate 11 of the measuring base 1.

[0072] The mounting bracket 6 has transverse screw holes 61;

[0073] The dial indicator body is fixed to the mounting bracket 6 by bolts threaded into the screw hole 61.

[0074] Preferably, the mounting bracket 6 is I-shaped;

[0075] The dial indicator is fixed to the horizontal plate in the middle of the I-shaped mounting bracket 6 in the left and right directions;

[0076] The front and rear ends of the horizontal plates at both ends of the left and right sides of the I-shaped mounting bracket 6 are each fixed with a lower locking buckle 50.

[0077] The copper substrate curvature testing fixture of Example 4 can be used to fasten a dial indicator through the screw hole 61, place the calibration block on the dial indicator probe 31 for calibration, and after the dial indicator probe 31 is calibrated, place the copper substrate to be tested between multiple positioning pins 205 for measurement.

[0078] Example 5

[0079] Based on the copper substrate curvature testing fixture of Embodiment 1, the measuring base 1 also includes a base plate 12;

[0080] The top plate 1 is fixedly installed directly above the bottom plate 12;

[0081] Both the top plate 1 and the bottom plate 12 are rectangular;

[0082] The four corners of the top plate are fixedly connected to the four corners of the bottom plate 12 by columns 13.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A fixture for testing the curvature of a copper substrate, characterized in that, It includes a measuring base (1), a measuring module (2), and a dial indicator; The measuring base (1) includes a top plate (11); Positioning posts (111) are fixedly installed at both ends of the upper surface of the top plate (11). A through hole (112) is formed in the center of the top plate (11); The measurement module (2) includes a measurement base plate (20); Corresponding to the positioning posts (111) at the left and right ends of the upper surface of the top plate (11) and the lower through hole (112) in the center of the top plate (11), the measuring base plate (20) has two positioning holes (201) on the left, right and center and one upper through hole (202). At least three support pillars (204) are formed on the upper side of the measuring substrate (20); at least one support pillar (204) is located on the left side of the upper through hole (202), and at least one support pillar (204) is located on the right side of the upper through hole (202); The measuring substrate (20) of the measuring module (2) is mounted on the upper surface of the top plate (11). The positioning pins (111) at the left and right ends of the upper surface of the top plate (11) are respectively inserted into the positioning holes (201) on the left and right sides of the measuring substrate (20), and the lower through hole in the center of the top plate (11) is aligned with the upper through hole (202) in the center of the measuring substrate (20). The dial indicator is installed and fixed on the lower side of the top plate (11), and the probe (31) of the dial indicator extends upward through the lower through hole (112) in the center of the top plate (11) and the upper through hole (202) in the center of the measuring base plate (20) to the upper side of the measuring base plate (20). The upper end of the dial indicator probe (31) is higher than the upper end of the support column (204).

2. The copper substrate curvature testing fixture according to claim 1, characterized in that, The height of the support column (204) can be adjusted.

3. The copper substrate curvature testing fixture according to claim 1, characterized in that, The top plate (11) is fixed with a lower latch (50) on the front and rear sides respectively. Corresponding to the lower latches (50) fixed on the front and rear sides of the top plate (11), the upper latches (51) are fixed on the front and rear sides of the measuring base plate (20). After the measuring base plate (20) of the measuring module (2) is placed on the upper surface of the top plate (11), the top plate (11) of the measuring base (1) is locked with the measuring base plate (20) of the measuring module (2) by fastening the corresponding lower latch (50) and the upper latch (51).

4. The copper substrate curvature testing fixture according to claim 3, characterized in that, The lower latch (50) and upper latch (51) are made of stainless steel.

5. The copper substrate curvature testing fixture according to claim 1, characterized in that, At least four positioning pins (205) are formed on the upper side of the measuring substrate (20). Each support column (204) is located within the area enclosed by each locating pin (205); The two positioning holes (201) on the measuring base plate (20) are located outside the area enclosed by each positioning pin (205).

6. The copper substrate curvature testing fixture according to claim 5, characterized in that, The upper end of the positioning pin (205) is higher than the upper end of the probe (31) of the dial indicator.

7. The copper substrate curvature testing fixture according to claim 5, characterized in that, The positioning pin (205) is made of stainless steel; The positioning post (111) is made of stainless steel.

8. The copper substrate curvature testing fixture according to claim 3, characterized in that, A mounting bracket (6) is fixed to the lower side of the top plate (11) of the measuring base (1); The mounting bracket (6) has transverse screw holes (61). The dial indicator body is fixed to the mounting bracket (6) by bolts threaded into the screw hole (61).

9. The copper substrate curvature testing fixture according to claim 8, characterized in that, The mounting bracket (6) is I-shaped; The dial indicator is fixed to the horizontal plate in the middle of the I-shaped mounting bracket (6); The front and rear ends of the horizontal plates at both ends of the left and right sides of the I-shaped mounting bracket (6) are respectively fixed with lower locking buckles (50).

10. The copper substrate curvature testing fixture according to claim 1, characterized in that, The measuring base (1) also includes a base plate (12); The top plate (11) is fixedly installed directly above the bottom plate (12); Both the top plate (11) and the bottom plate (12) are rectangular; The four corners of the top plate are fixedly connected to the four corners of the bottom plate (12) by columns (13).

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