CN113820225A

CN113820225A - Shearing force testing tool

Info

Publication number: CN113820225A
Application number: CN202111221383.1A
Authority: CN
Inventors: 丁新科; 王东旭; 赵文超
Original assignee: Bozhon Precision Industry Technology Co Ltd
Current assignee: Bozhon Precision Industry Technology Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2021-12-21
Anticipated expiration: 2041-10-20
Also published as: CN113820225B

Abstract

The invention relates to a shearing force testing tool which comprises a supporting seat assembly, a clamp assembly and a testing head assembly, wherein a linear slide rail in the supporting seat assembly is fixedly arranged on a supporting plate; in the clamp assembly, a bottom plate is connected with a linear slide rail in a sliding manner, a cover plate is detachably connected with the bottom plate, and a test hole matched with a test salient point is formed in the cover plate; in the test head assembly, one end of a fixing frame is fixedly connected with a supporting plate, a push rod penetrates through the other end of the fixing frame and is perpendicular to a linear sliding rail, and a push head is perpendicular to the plane of a cover plate and is telescopically inserted into the push rod. The invention has simple structure, convenient operation and stable test.

Description

Shearing force testing tool

Technical Field

The invention relates to the technical field of component reliability tests, in particular to a shearing force testing tool.

Background

Due to the impact action of vibration and the like generated under the conditions of welding, transportation and use, electronic elements welded on the circuit board can cause mechanical stress to be generated on welding points and finally cause the failure of the welding points or devices, and the shear force test can reflect the bonding strength of the welding points and welding metal. Therefore, the solder joint shear test is an important reliability test for the solder joint and the component on the circuit board pad.

The tensile force shearing tester is a common test instrument used for evaluating the welding strength of the BGA welding spot in the industry, and has the advantages of high test cost, unstable test and complex operation, and the test needs to be adjusted again before different welding spots or components are tested under the current test requirement condition.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of high cost and unstable test of the shearing force test device in the prior art, and provide a shearing force test tool which is simple in structure, convenient to operate and stable in test.

In order to solve the technical problem, the invention provides a shear force testing tool, which comprises:

the supporting seat assembly comprises a supporting plate and a linear sliding rail, and the linear sliding rail is fixedly arranged on the supporting plate;

the clamp assembly comprises a bottom plate and a cover plate, the bottom plate is connected with the linear slide rail in a sliding mode, the cover plate is detachably connected with the bottom plate, and a test hole matched with the test salient point is formed in the cover plate;

the test head assembly comprises a fixing frame, a push rod and a push head, wherein one end of the fixing frame is fixedly connected with the supporting plate, the push rod penetrates through the other end of the fixing frame and is perpendicular to the linear sliding rail, and the push head is perpendicular to the plane where the cover plate is located and is telescopically inserted into the push rod.

In an embodiment of the present invention, a clamping assembly is disposed between the cover plate and the bottom plate, the clamping assembly is mounted at opposite corners of the clamp assembly, the clamping assembly includes a fixed bolt mounted on the bottom plate, and a fixed block, a sliding bolt and a first spring mounted on the cover plate, the fixed block is mounted in a clamping groove on the cover plate, the fixed block is provided with a sliding groove for accommodating the sliding bolt, the first spring is mounted between the cover plate and the sliding bolt, the fixed block and the cover plate are further provided with a lock hole matched with the fixed bolt, the fixed bolt is provided with a lock groove, and the sliding bolt is provided with a protrusion matched with the lock groove.

In one embodiment of the invention, the testing hole is a long hole arranged along the length direction of the push rod, and the cover plate on the periphery of the testing hole is arranged into an inclined surface inclined outwards.

In one embodiment of the invention, a stop layer is arranged on one side of the inner periphery of the test hole close to the bottom plate.

In one embodiment of the invention, the pushing head and the pushing rod are provided with first locking holes which are matched with each other, the pushing head and the pushing rod are fixed through first locking pins which are inserted into the first locking holes, and the end part of the pushing head is provided with a handle which extends out of the pushing rod.

In one embodiment of the invention, a spring baffle is arranged at the end part of the push rod, a second spring is arranged between the push head and the spring baffle, the handle is positioned at the side edge of the push head, and the handle extends out of a gap between the spring baffle and the push rod.

In one embodiment of the invention, the push head comprises a guide section and a test section which are integrally formed, the guide section is positioned in the push rod, the test section is trapezoidal, the tip of the test section extends out of the push rod and points to the clamp assembly, and the tip of the test section is provided with a concave arc surface matched with the test salient point.

In one embodiment of the invention, the end part of the fixing frame is provided with a limit pin, the end part of the fixing frame and the middle part of the push rod are provided with second locking holes which are matched with each other, and the fixing frame and the push rod are fixed by the second locking pin inserted into the second locking holes.

In an embodiment of the invention, the bottom plate is connected with the linear slide rail through a slide rail mounting plate, the slide rail mounting plate is connected with a locking bolt, the locking bolt is in threaded connection with one end of a locking nut, the support plate is provided with a locking groove, the other end of the locking nut hooks the locking groove, and the length of the locking nut is smaller than the distance between the support plate and the slide rail mounting plate.

In one embodiment of the present invention, the linear sliding rails are arranged in two groups in parallel.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the shearing force testing tool is simple in structure, convenient to operate and stable in testing.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a perspective view of the clamping assembly of the present invention as it is snapped;

FIG. 3 is a schematic view of the clamping assembly of the present invention shown separated;

FIG. 4 is a schematic view of a test well configuration of the present invention;

FIG. 5 is a schematic view of a test head assembly of the present invention;

FIG. 6 is a schematic view of a mounting structure of the pushing head of the present invention;

FIG. 7 is a schematic view of the lock nut of the present invention;

fig. 8 is a side view of the present invention.

The specification reference numbers indicate: 10. a support base assembly; 11. a support plate; 12. a linear slide rail; 13. a slide rail mounting plate; 14. locking the bolt; 15. locking the nut; 16. a locking groove;

20. a clamp assembly; 21. a base plate; 22. a cover plate; 23. a test well; 24. a clamping groove; 25. a guide slope; 26. a stopper layer;

30. a test head assembly; 31. a fixed mount; 32. a push rod; 321. a second locking pin; 33. pushing the head; 331. a guide section; 332. a testing section; 34. a first locking hole; 35. a first locking pin; 36. a handle; 37. a spring baffle; 38. a second spring;

40. a clamping assembly; 41. fixing the lock tongue; 42. a fixed block; 43. a sliding bolt; 44. a first spring; 45. a chute; 46. a lock hole; 47. locking the groove; 48. and (4) protruding.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1, a schematic view of a shear force testing tool according to the present invention is shown. The test tool of the invention comprises:

the supporting seat assembly 10 comprises a supporting plate 11 and a linear slide rail 12, and the linear slide rail 12 is fixedly arranged on the supporting plate 11;

the clamp assembly 20 comprises a bottom plate 21 and a cover plate 22, the bottom plate 21 is connected with the linear slide rail 12 in a sliding mode, the cover plate 22 is detachably connected with the bottom plate 21, and a test hole 23 matched with a test salient point is formed in the cover plate 22;

the test head assembly 30 comprises a fixed frame 31, a push rod 32 and a push head 33, wherein one end of the fixed frame 31 is fixedly connected with the supporting plate 11, the push rod 32 penetrates through the other end of the fixed frame 31 and is perpendicular to the linear slide rail 12, and the push head 33 is perpendicular to the plane of the cover plate 22 and is telescopically inserted into the push rod 32.

The supporting seat assembly 10 is used for supporting the clamp assembly 20 and the test head assembly 30, a product to be tested is fixedly clamped in the clamp assembly 20, the pressure output device presses the test head assembly 30, the test head assembly 30 abuts against a test salient point of the product to be tested, the test salient point is pressed, the test salient point is subjected to shearing force, and the shearing force test of the product is achieved. In this embodiment, in order to apply pressure to the test bumps, the supporting plate 11 is a vertical plate, and the supporting plate 11 is installed on the supporting base, so that pressure in the vertical direction can be applied to the test bumps, and the pressure in the vertical direction can be conveniently realized. The position of the clamp assembly 20 can be changed by arranging the linear slide rail 12, so that the test head assembly 30 can be fixed on the supporting plate 11, the test bumps at different positions on a product to be tested can be tested by adjusting the position of the clamp assembly 20, the positions of the pressure output device and the test head assembly 30 do not need to be adjusted, and the clamp assembly 20 is convenient and easy to adjust, so that the test is more stable. Meanwhile, the push rod 32 penetrates through the fixing frame 31, the fixing frame 31 guides the movement of the push rod 32, a limiting pin is arranged at the end part of the fixing frame 31, the push rod 32 is prevented from being drawn out of the fixing frame 31, the push rod 32 can be fixed with the fixing frame 31 when the push rod 32 is not connected with a pressure output device, second locking holes matched with each other are formed in the middle parts of the end part of the fixing frame 31 and the middle part of the push rod 32, and the fixing frame 31 and the push rod 32 are fixed through second locking pins 321 inserted into the second locking holes.

In this embodiment, the product to be tested is clamped between the bottom plate 21 and the cover plate 22, the product to be tested is fixed stably, and the positioning is accurate. Since the surface of the product is covered by the cover plate 22, the test holes 23 are formed in the cover plate 22 at positions corresponding to the test bumps, and the test head assembly 30 presses the test bumps of the product to be tested through the test holes 23. When the test position is changed, the push head 33 is retracted into the push rod 32, the position of the clamp assembly 20 can be adjusted along the linear slide rail 12, interference does not exist between the push head 33 and the clamp assembly 20, and after the adjustment is in place, the push head 33 extends out again to perform a shear force test.

During operation, the cover plate 22 is detached from the bottom plate 21, and the product to be tested is clamped and fixed between the cover plate 22 and the bottom plate 21. The push rod 32 is connected to a pressure output device, so that the push head 33 is in a contracted state. The position of the fixture assembly 20 is adjusted so that the pusher 33 is aligned with the test bump and the pusher 33 extends to abut the test bump. And the pressure output device applies pressure to the test salient point to realize the shear force test at the position. After the test is completed, the pushing head 33 is retracted into the pushing rod 32, and the position of the fixture assembly 20 is adjusted, so that the pushing head 33 is aligned with the next test bump until the test of all the test bumps on the product to be tested is completed.

Referring to fig. 1, in order to facilitate the detachment of the cover plate 22 from the base plate 21, a clamping assembly 40 is disposed between the cover plate 22 and the base plate 21, and the clamping assembly 40 is mounted at a diagonal of the clamp assembly 20. On the one hand, a stable connection of the cover 22 to the base plate 21 is ensured and, on the other hand, an easy operation is provided for opening the cover 22. In this embodiment, the clamping assembly 40 is mounted to one set of opposing corners of the clamp assembly 20, and the other set of opposing corners of the clamp assembly 20 are positioned by the engagement of the alignment pins and alignment holes.

Referring to fig. 2 and 3, in particular, the clamping assembly 40 includes a fixed latch 41 mounted on the bottom plate 21, and a fixed block 42, a sliding latch 43 and a first spring 44 mounted on the cover plate 22, wherein the fixed block 42 is mounted in the clamping groove 24 of the cover plate 22, the fixed block 42 is provided with a sliding groove 45 for accommodating the sliding latch 43, and the first spring 44 is mounted between the clamping groove 24 and the sliding latch 43, so that the sliding latch 43 can reciprocate in the sliding groove 45. The fixed block 42 and the cover plate 22 are further provided with a lock hole 46 matched with the fixed bolt 41, the fixed bolt 41 is provided with a lock groove 47, and the sliding bolt 43 is provided with a protrusion 48 matched with the lock groove 47. When the cover plate 22 is buckled on the bottom plate 21, the fixed bolt 41 is aligned with the lock hole 46 on the fixed block 42, and the sliding bolt 43 can move, along with the pressing of the cover plate 22, the fixed bolt 41 abuts against the protrusion 48, the first spring 44 is compressed, the protrusion 48 is pressed down until the fixed bolt 41 is inserted into the lock hole 46 on the cover plate 22, the protrusion 48 moves to the position corresponding to the lock groove 47, so that the spring is snapped into the lock groove 47, and the cover plate 22 and the fixed plate are buckled together. When the cover plate 22 is opened, the sliding bolt 43 is pressed, so that the first spring 44 is compressed, the protrusion 48 exits the lock groove 47, the fixed bolt 41 can be drawn out from the lock groove 47, the separation of the cover plate 22 and the bottom plate 21 is realized, and the assembly and disassembly are convenient.

Referring to fig. 4, in order to provide a sufficient movement space for the push head 33, the test hole 23 is a long hole formed along the length of the push rod 32. The cover plate 22 of one circle of the test hole 23 is provided with a guide inclined plane 25 which inclines outwards, so that the push head 33 can be inserted into the test hole 23. Furthermore, a stop layer 26 is disposed on one side of the inner circumference of the testing hole 23 close to the bottom plate 21. The stop layer is attached to the product to be tested, and the thickness of the stop layer is small, so that the pushing head 33 is not influenced to be inserted into the test hole 23 while the product to be tested is pressed and fixed.

Referring to fig. 5, in order to keep the pushing head 33 in a retracted or extended state, the pushing head 33 and the pushing rod 32 are provided with first locking holes 34 which are engaged with each other, and the pushing head 33 and the pushing rod 32 are fixed by first locking pins 35 which are inserted into the first locking holes 34. The position of the push head 33 in the push rod 32 is first adjusted, and then the first locking pin 35 is simultaneously inserted into the first locking holes 34 of the push rod 32 and the push head 33, so as to realize the relative fixation of the positions of the two. In order to facilitate the adjustment of the position of the pushing head 33 in the pushing rod 32, a handle 36 extending out of the pushing rod 32 is provided at the end of the pushing head 33. The adjustment of the position of the pusher 33 is achieved by gripping the handle 36. Further, as shown in fig. 6, a spring baffle 37 is disposed at an end of the push rod 32, and a second spring 38 is disposed between the push head 33 and the spring baffle 37, so that the push head 33 can automatically extend and retract by using the elastic force of the spring, when the fixture assembly 20 moves from one position to another position, due to the guidance of the guiding inclined plane 25, the push head 33 can automatically retract when moving out of one testing hole 23, and automatically extend when reaching another testing hole 23, so that when testing different testing bumps on a product to be tested, frequent adjustment of the push head 33 is not required. Due to the obstruction of the second spring 38 and the spring stop 37, in order to facilitate the arrangement of the handle 36, the handle 36 is arranged at the side of the push head 33, and the handle 36 extends out of the gap between the spring stop 37 and the push rod 32. The push head 33 comprises a guide section 331 and a test section 332 which are integrally formed, the guide section 331 is located in the push rod 32, the test section 332 is trapezoidal, and the tip of the test section 332 extends out of the push rod 32 and points to the clamp assembly 20. The tip of the test section 332 is small in size, and does not affect other positions of the product to be tested while ensuring contact with the test bumps. In order to make the stress of the test bump uniform, the tip of the test segment 332 is provided with a concave arc surface matching with the test bump.

Referring to fig. 7 and 8, because the clamp assembly 20 is slidably connected to the linear sliding rail 12, in order to prevent the position of the clamp assembly 20 from being unstable during operation, in this embodiment, the bottom plate 21 is disposed to be connected to the linear sliding rail 12 through the sliding rail mounting plate 13, the sliding rail mounting plate 13 is connected to the locking bolt 14, the locking bolt 14 is in threaded connection with one end of the locking nut 15, the support plate 11 is provided with the locking groove 16, the other end of the locking nut 15 hooks the locking groove 16, and the length of the locking nut 15 is smaller than the distance between the support plate 11 and the sliding rail mounting plate 13. When the locking bolt 14 is loosened, the other end of the locking nut 15 is released from the locking groove 16, and the locking nut 15 can be arbitrarily moved in the locking groove 16, so that the rail mounting plate 13 connected to the locking nut 15 can be moved along the linear rail 12. When the locking bolt 14 is screwed, the other end of the locking nut 15 is tightly attached to the support plate 11 on the side of the locking groove 16, and the friction force between the locking nut 15 and the support plate 11 prevents the slide rail mounting plate 13 connected with the locking nut 15 from moving, so that the position of the clamp assembly 20 is fixed. Further, the linear slide rails 12 are arranged in parallel in two groups. Through the limit of the two groups of linear sliding rails 12, the fixture assembly 20 can be ensured to move stably, and the consistency of the test conditions is ensured.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a shear force test fixture which characterized in that includes:

2. The shear force test tool of claim 1, wherein: the cover plate and be provided with clamping component between the bottom plate, clamping component install in anchor clamps subassembly diagonal angle, clamping component including install in fixed spring bolt on the bottom plate and install fixed block, slip spring bolt and the first spring on the cover plate, the fixed block install in press from both sides tight inslot on the apron, be provided with on the fixed block and hold the spout of slip spring bolt, first spring mounting in between apron and the slip spring bolt, still be provided with on fixed block and the apron with the lockhole that fixed spring bolt matches, the locked groove has been seted up on the fixed spring bolt, be provided with on the slip spring bolt with locked groove complex arch.

3. The shear force test tool of claim 1, wherein: the test hole is for following the slot hole that push rod length direction set up, the apron of test hole a week sets up to the inclined plane that leans out.

4. The shear force test tool of claim 3, wherein: and a blocking layer is arranged on one side of the inner periphery of the test hole close to the bottom plate.

5. The shear force test tool of claim 1, wherein: the push head and the push rod are provided with first locking holes which are matched with each other, the push head and the push rod are fixed through first locking pins which are inserted into the first locking holes, and the end part of the push head is provided with a handle which extends out of the push rod.

6. The shear force test tool of claim 5, wherein: the handle is located on the side edge of the pushing head, and the handle extends out of a gap between the spring baffle and the push rod.

7. The shear force test tool of claim 5, wherein: the push head comprises an integrally formed guide section and a test section, the guide section is located in the push rod, the test section is trapezoidal, the tip of the test section extends out of the push rod and points to the clamp assembly, and the tip of the test section is provided with a concave arc surface matched with the test salient point.

8. The shear force test tool of claim 1, wherein: the fixing frame is characterized in that a limiting pin is arranged at the end part of the fixing frame, second locking holes matched with each other are formed in the end part of the fixing frame and the middle part of the push rod, and the fixing frame and the push rod are fixed through the second locking pin inserted into the second locking holes.

9. The shear force test tool of claim 1, wherein: the bottom plate pass through the slide rail mounting panel with linear slide rail links to each other, be connected with locking bolt on the slide rail mounting panel, locking bolt and lock nut one end threaded connection, be provided with the locking groove in the backup pad, the lock nut other end catches on the locking groove, lock nut's length is less than the backup pad with the distance between the slide rail mounting panel.

10. The shear force test tool of claim 1, wherein: the linear slide rails are arranged in parallel in two groups.