Fixing clamp of tension testing machine

Abstract

The utility model discloses a tension testing machine fixing clamp, which comprises a base and a clamping mechanism arranged on the base, the clamping mechanism is used for clamping a lead frame on a test board on a tension testing machine, the base is provided with a clamping groove and a first screw, and the edge of the test board can extend into the clamping groove. The first screw can extend into the clamping groove to abut against one side of the test board, and the other side of the test board abuts against the inner wall of the clamping groove, so that the base is detachably installed on the test board, a detachable clamping mode is adopted, the base can be installed at any position around the test board, the clamping requirements of different positions of the lead frame are met, and the clamping efficiency is improved. And the applicability is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to semiconductor tension testing machine technical field, concretely relates to a tension testing machine fixed clamp. BACKGROUND

[0002] Wire bonding is a process in the production process of semiconductor devices, wire bonding is tightly welded by using heat, pressure, ultrasonic energy to make the bonding lead and the solder pad of the substrate or lead frame, realize the electrical interconnection between the chip and the substrate or lead frame and the information intercommunication between the chips.

[0003] After completing the connection between the chip and the lead frame, it is usually necessary to use a push-pull force testing machine to detect the quality of the bonding lead, that is, to detect whether the pull force and the push force of the bonding lead one-two solder joint are qualified, the traditional push-pull force testing machine mainly includes a test table, a fixed clamp and a push-pull force testing mechanism, during testing, the fixed clamp is used to clamp one side of the lead frame on the test table, and then the push-pull force testing mechanism is used to detect the push-pull force of the bonding lead on one side of the lead frame. However, since the fixed clamp is installed on the test table in a fixed manner, the fixed clamp can only clamp a specific position of the lead frame, and the adaptability is poor. SUMMARY

[0004] The utility model discloses in view of prior art's lack, provide a kind of tension testing machine fixed clamp, it adopts detachable clamping mode, realize base installation in the arbitrary position of test table four around, satisfy the clamping needs of different positions of lead frame, and the adaptability is better.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of tension testing machine fixed clamp, including base, and the clamping mechanism on base, the clamping mechanism is used to clamp lead frame on the test table of tension testing machine, first screw and clamping groove are equipped on the base, the edge of test table can be inserted into clamping groove, first screw can be inserted into clamping groove and abut with one side of test table, and the other side of test table abuts with the inner wall of clamping groove, so that the base can be detachably installed on test table.

[0007] By setting clamping groove and first screw on base, when installing, first make tension testing machine fixed clamp move towards the edge of test table, make the edge of test table insert into clamping groove, then use first screw to insert into clamping groove and abut with one side of test table, and make the other side of test table abut with the inner wall of clamping groove, so that the base can be installed on test table in clamping mode, using detachable clamping mode, so as to realize that base is installed in the arbitrary position of test table four around, satisfy the clamping needs of different positions of lead frame.

[0008] In one embodiment, the clamping groove is open forwardly and has an opening, and the clamping groove extends through the left and right ends of the base.

[0009] In one embodiment, the clamping mechanism has a rotating seat, a clamping piece and a driving assembly, the rotating seat is rotatably installed on the base, the clamping piece is installed on the rotating seat, and the driving assembly can drive the rotating seat to rotate so that the clamping piece clamps the lead frame on the test table.

[0010] In one embodiment, the rotating seat is provided with a mounting hole extending through the front and back sides of the rotating seat, and the clamping piece is adjustably installed in the mounting hole.

[0011] In one embodiment, the rotating seat is provided with a second screw hole communicating with the mounting hole, the second screw hole is threadedly connected with a second screw, the second screw abuts against one side of the clamping piece, and the other side of the clamping piece abuts against the inner wall of the mounting hole, so that the clamping piece is adjustably installed in the mounting hole.

[0012] In one embodiment, the clamping piece has a plate portion and a hook portion bent downward from the front end of the plate portion, the plate portion is installed on the rotating seat, and the hook portion can clamp the lead frame on the test table.

[0013] In one embodiment, the lower end of the hook portion has an arc-shaped abutting surface protruding downward.

[0014] In one embodiment, the driving assembly includes a third screw and a movable block, the third screw is threadedly connected to the base, the movable block is connected with the third screw, the third screw can drive the movable block to move forward and backward, and the third screw drives the rotating seat to rotate through the movable block.

[0015] In one embodiment, the lower end of the rotating seat is provided with a groove with an opening downward, the movable block is arranged in the groove, and the lower surface of the movable block abuts against the base.

[0016] In one embodiment, the front end of the base is provided with a protrusion extending forwardly, and the protrusion is located above the clamping groove.

[0017] The utility model discloses have obvious advantages and beneficial effects compared with prior art, specifically speaking, through setting up the clamping groove and first screw on the base, when installing, first fixed clamp of the tension testing machine is moved to the edge of test platform close, makes the edge of test platform stretch into the clamping groove, then utilizes first screw to stretch into the clamping groove and abuts with one side of test platform, and makes the other side of test platform and the inner wall of clamping groove abut, can install the base on test platform in clamping mode, adopt detachable clamping mode, thereby realize that the base is installed in the arbitrary position of test platform four, satisfy the clamping need of lead frame different position.

[0018] In order to more clearly set forth the structural features, technical means and the concrete purpose and function reached of the utility model, below combining with the specific embodiment to the utility model make further detailed description: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the assembly structure schematic diagram of the embodiment of the utility model;

[0020] Figure 2 It is the side view of the embodiment of the utility model;

[0021] Figure 3 It is the base structure schematic diagram of the embodiment of the utility model;

[0022] Figure 4 It is the rotating seat and movable block assembly schematic diagram of the embodiment of the utility model;

[0023] Figure 5 It is the use state schematic diagram of the embodiment of the utility model.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10-base, 11-clamping groove, 12-first screw, 13-first screw hole, 14-connection plate, 15-rotating shaft, 16-tumulus, 20-clamping mechanism, 21-rotating seat, 211-mounting hole, 212-second screw hole, 213-groove, 214-avoiding groove, 22-clamping piece, 221-plate part, 222-hook part, 223-arc pressure surface, 23-driving assembly, 231-third screw, 232-movable block, 233-through hole, 234-nut, 24-second screw, 30-test platform, 31-lead frame. DETAILED DESCRIPTION

[0026] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the position or element must have a specific orientation, with a specific orientation structure and operation, therefore, it cannot be understood as the limitation of the utility model.

[0027] In the description of the utility model, it needs to explain, unless otherwise explicitly provided and limited, the term "installation", "connection", "connection" should be broad sense, for example, it can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0028] As Figures 1-5 The utility model discloses a tension testing machine fixed clamp, including base 10 and setting on the base 10 clamping mechanism 20, clamping mechanism 20 is used for clamping lead frame 31 on the test bench 30 of tension testing machine.

[0029] The base 10 is equipped with clamping groove 11 and first screw 12, the edge of test bench 30 can be inserted into clamping groove 11, the first screw 12 can be inserted into clamping groove 11 and abuts with one side of test bench 30, and the other side of test bench 30 abuts with the inner wall of clamping groove 11, so that the base 10 can be detachably installed on test bench 30, specifically, the first screw 12 is spaced apart and is equipped with two in left and right directions, and the clamping mechanism 20 is located between the two first screws 12.

[0030] The clamping groove 11 is open forward and forms an opening, and the clamping groove 11 penetrates the left and right ends of the base 10, by setting the clamping groove 11 open forward and forming an opening, and the clamping groove 11 penetrates the left and right ends of the base 10, so that the base 10 is adjusted and installed on test bench 30 at any position along the left and right straight lines, and the clamping position of lead frame 31 is conveniently adjusted by clamping piece 22.

[0031] The upper surface of the base 10 is equipped with the first screw hole 13 that communicates with the clamping groove 11, and the first screw 12 is screwed in the first screw hole 13.

[0032] The clamping mechanism 20 has a rotating seat 21, a clamping piece 22 and a driving assembly 23, the rotating seat 21 is rotatably installed on the base 10, the clamping piece 22 is installed on the rotating seat 21 and can rotate with the rotating seat 21, and the driving assembly 23 can drive the rotating seat 21 to rotate so that the clamping piece 22 clamps the lead frame 31 on the test table 30.

[0033] Two connecting plates 14 are arranged on the base 10 and spaced apart in the left-right direction, the rotating seat 21 is rotatably installed on the two connecting plates 14 through a rotating shaft 15, and the axis of the rotating shaft 15 extends in the left-right direction.

[0034] The rotating seat 21 is provided with a mounting hole 211 penetrating through the front and back sides of the rotating seat 21, and the clamping piece 22 can be adjustably installed in the mounting hole 211 in the front-rear direction; by being adjustably installed in the mounting hole 211 in the front-rear direction, the clamping position of the clamping piece 22 can be adjusted according to the size of the lead frame 31 and the position of the chip to be tested, and the versatility is good.

[0035] The rotating seat 21 is provided with a second screw hole 212 in communication with the mounting hole 211, the second screw hole 212 is threadedly connected with a second screw 24, the second screw 24 abuts against one side of the clamping piece 22, and the other side of the clamping piece 22 abuts against the inner wall of the mounting hole 211, so that the clamping piece 22 is adjustably installed in the mounting hole 211 in the front-rear direction.

[0036] The clamping piece 22 has a plate part 221 and a hook part 222 bent downward from the front end of the plate part 221, the plate part 221 is installed in the mounting hole 211 on the rotating seat 21, and the hook part 222 can clamp the lead frame 31 on the test table 30; by setting the clamping piece 22 composed of the plate part 221 and the hook part 222, the hook part 222 and the lead frame 31 adopt surface contact, the contact area of the hook part 222 and the lead frame 31 is increased, and the hook part 222 can better exert pressure and clamp the lead frame 31 more stably.

[0037] The lower end of the hook part 222 has an arc-shaped abutting surface 223 protruding downward, the arc-shaped abutting surface 223 is arranged so that the hook part 222 can stably clamp the lead frame 31 when the hook part 222 rotates at different angles.

[0038] The driving assembly 23 comprises a third screw 231 and a movable block 232, the third screw 231 is threadedly connected to the base 10, the axis of the third screw 231 extends in the front-rear direction, the movable block 232 is connected with the third screw 231, the third screw 231 can drive the movable block 232 to move forward and backward, the third screw 231 drives the rotating seat 21 to rotate through the movable block 232, when the movable block 232 pushes the rotating seat 21 backward, the rotating seat 21 drives the clamping piece 22 to rotate, so that the clamping piece 22 clamps the lead frame 31 on the test table 30.

[0039] The lower end of the rotating seat 21 is provided with a downwardly-opened groove 213, the groove 213 penetrates through the left and right sides of the rotating seat 21, the movable block 232 is arranged in the groove 213, the lower surface of the movable block 232 abuts against the base 10, the width of the groove 213 in the front-rear direction is greater than the width of the movable block 232 in the front-rear direction, when the movable block 232 moves backward, the movable block 232 pushes the rear side wall in the groove 213, so that the rotating seat 21 drives the clamping piece 22 to rotate, until the clamping piece 22 clamps the lead frame 31 on the test table 30, the rotating seat 21 stops rotating.

[0040] The movable block 232 is provided with a through hole 233, one end of the third screw 231 penetrates through the through hole 233 and extends forward, a nut 234 is threadedly connected to the third screw 231, the nut 234 abuts against the movable block 232, the rotating seat 21 is provided with a avoiding groove 214 for the nut 234 to extend into, the avoiding groove 214 is communicated with the groove 213.

[0041] The front end of the base 10 is provided with a forwardly-extending boss 16, the boss 16 is located above the clamping groove 11; by arranging the boss 16, for the concave island frame, the edge of the concave island frame can be supported on the boss 16 to be fixed, so that the island is in a suspended state, the tension data of the bonding lead corresponding to the first row of chips on the edge of the concave island frame is more accurate.

[0042] The use method of the utility model:

[0043] The clamping groove 11 is aligned with the edge of the test table 30, the base 10 moves towards the test table 30, so that the edge of the test table 30 extends into the clamping groove 11, the first screw 12 is screwed, the first screw 12 extends into the clamping groove 11 and abuts against the upper surface of the test table 30, the lower surface of the test table 30 abuts against the inner wall of the clamping groove 11, at this time, the base 10 is fixed on the test table 30;

[0044] Pull the clamping piece 22, make the hook portion 222 move above the lead frame 31, tighten the second screw 24, the second screw 24 extends into the mounting hole 211 and abuts the upper surface of the plate portion 221, the lower surface of the plate portion 221 abuts the inner wall of the mounting hole 211, at this time the clamping piece 22 is fixed on the rotating seat 21;

[0045] Turn the third screw 231, the third screw 231 moves backward, the third screw 231 drives the nut 234 to move backward, the nut 234 pushes the movable block 232 to move backward, the movable block 232 pushes the rotating seat 21 backward, the rotating seat 21 drives the clamping piece 22 to rotate clockwise around the rotating shaft 15, the arc-shaped abutting surface 223 at the lower end of the hook portion 222 clamps the lead frame 31 on the test table 30, at this time the rotating seat 21 no longer rotates; The subsequent can carry out the push-pull force test operation on the lead frame 31.

[0046] In summary, the utility model discloses a clamping groove 11 and first screw 12 are arranged on the base 10, when installing, first make the tension testing machine fixed clamp move towards the edge of test table 30, make the edge of test table 30 extend into the clamping groove 11, then utilize first screw 12 to extend into the clamping groove 11 and abut to one side of test table 30, and make the other side of test table 30 abut to the inner wall of clamping groove 11, can install base 10 on test table 30 in clamping mode, adopt detachable clamping mode, thereby realize that base 10 is installed at any position of test table 30 periphery, satisfy the clamping need of lead frame 31 different positions.

[0047] The above is only the preferred embodiment of the utility model, and does not limit the utility model, so any modification, equivalent replacement, improvement etc. according to the technical actuality of the utility model to the above embodiment still belongs to the range of the utility model technical scheme.

Claims

1. A clamping device for a tensile testing machine, comprising a base and a clamping mechanism disposed on the base, the clamping mechanism being used to clamp a lead frame onto a test table of the tensile testing machine, characterized in that: The base is provided with a clamping groove and a first screw. The clamping groove allows the edge of the test bench to extend into it, and the first screw can extend into the clamping groove and abut against one side of the test bench. The other side of the test bench abuts against the inner wall of the clamping groove, so that the base can be detachably installed on the test bench.

2. The tensile testing machine fixing clamp according to claim 1, characterized in that, The clamping groove opens forward to form an opening, and the clamping groove extends through both ends of the base.

3. The tensile testing machine fixing clamp according to claim 1, characterized in that, The clamping mechanism has a rotating base, a clamping member, and a driving assembly. The rotating base is rotatably mounted on the base, the clamping member is mounted on the rotating base, and the driving assembly can drive the rotating base to rotate so that the clamping member clamps the lead frame on the test bench.

4. The tensile testing machine fixing clamp according to claim 3, characterized in that, The rotating base is provided with mounting holes that extend through the front and rear sides of the rotating base, and the clamping member can be adjusted and installed in the mounting holes.

5. The tensile testing machine fixing clamp according to claim 4, characterized in that, The rotating seat is provided with a second screw hole that communicates with the mounting hole. A second screw is threaded into the second screw hole. The second screw abuts against one side of the clamping member, and the other side of the clamping member abuts against the inner wall of the mounting hole, so that the clamping member can be adjusted back and forth and installed in the mounting hole.

6. The tensile testing machine fixing clamp according to claim 3, characterized in that, The clamping member has a plate portion and a hook portion formed by bending downward from the front end of the plate portion. The plate portion is mounted on a rotating base, and the hook portion can clamp the lead frame onto the test bench.

7. The tensile testing machine fixing clamp according to claim 6, characterized in that, The lower end of the hook has a downward-protruding arc-shaped pressing surface.

8. The tensile testing machine fixing clamp according to claim 3, characterized in that, The drive assembly includes a third screw and a movable block. The third screw is threadedly connected to the base, and the movable block is connected to the third screw. The third screw can drive the movable block to move back and forth, and the third screw drives the rotating seat to rotate through the movable block.

9. The tensile testing machine fixing clamp according to claim 8, characterized in that, The lower end of the rotating base is provided with a downward-facing groove, and the movable block is disposed in the groove, with the lower surface of the movable block abutting against the base.

10. The tensile testing machine fixing clamp according to any one of claims 1-9, characterized in that, The base has a forward-extending boss at its front end, which is located above the clamping groove.

Images