Clamping device for IGBT (Insulated Gate Bipolar Translator) test

Abstract

The invention belongs to the technical field of IGBTs, and provides an IGBT test clamping device which comprises a base, a supporting cylinder is fixedly installed on the base, an installation ring is fixedly installed on the surface, away from the base, of the supporting cylinder, and multiple sets of sliding rods are installed on the installation ring in a sliding mode. The invention aims to solve the technical problems in the prior art that the IGBT operation is not stable enough during detection due to non-uniform pressing force and subsequent manual blanking and IGBT sorting are caused, and compared with the prior art, the IGBT pressing device has the beneficial effects that the accuracy of IGBT positioning is improved, the stable and uniform pressing of the IGBT can be realized, the stable operation of the IGBT during subsequent detection is ensured, and the production efficiency is improved. Automatic discharging after IGBT detection is achieved, the detected IGBTs can be stored in a classified mode according to the detection result of the IGBTs, the detection speed of the IGBTs is increased, and use is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of IGBT, and in particular relates to a clamping device for IGBT testing. Background Art

[0002] Insulated gate bipolar transistor (IGBT) is a commonly used power semiconductor device in power systems. Press-fit IGBT module is an IGBT module with advanced packaging, which has the characteristics of high reliability, double-sided heat dissipation, and failure short-circuit mode.

[0003] After the IGBT is produced, it needs to be tested. During the test, the IGBT needs to be clamped and pressed. Most of the existing technologies clamp and press the IGBT by using a clamp or a pressure plate. However, it is difficult to accurately position the IGBT during clamping, so the contact position between the clamp or the pressure plate and the IGBT is uncertain, resulting in uneven pressing force of the IGBT. During subsequent testing, the IGBT is not stable enough, which is not conducive to use. After the test is completed, the IGBT needs to be manually unloaded and sorted, which increases the manual workload. Summary of the invention

[0004] The purpose of the present invention is to provide a clamping device for IGBT testing to solve the technical problems in the prior art of uneven pressing force leading to unstable operation of IGBT during testing and subsequent manual unloading and sorting of IGBT.

[0005] The present invention is implemented as follows: a clamping device for IGBT testing comprises a base, a support cylinder is fixedly mounted on the base, a mounting ring is fixedly mounted on the surface of the support cylinder away from the base, a plurality of groups of slide bars are slidably mounted on the mounting ring, a positioning rod is fixedly mounted on the end of the slide bar located in the mounting ring, and a power assembly for driving the slide bar to move is arranged on the base; An L-shaped support plate is fixedly installed on the base, a second rotating power component is fixedly installed on the horizontal section of the support plate, a rotating plate is fixedly installed on the end of the output shaft of the second rotating power component, one side surface of the rotating plate is in sliding contact with the horizontal section of the support plate, a lifting frame with a U-shaped structure is slidably installed on the rotating plate, an arc groove for the lifting frame to pass through the horizontal section of the support plate is opened, the lifting frame passes through the rotating plate, and a lifting component for driving the lifting frame to move up and down is arranged on the rotating plate, a pressing plate with an annular structure is fixedly installed on the end of the lifting frame close to the base, the axis of the mounting ring is located on the arc surface formed by the moving trajectory of the axis of the pressing plate, a groove with an annular structure is opened on the surface of the pressing plate close to the base, and an adsorption component for adsorption of the IGBT for adsorption testing is arranged on the pressing plate.

[0006] Further technical solution: the sliding rods penetrate the mounting ring and are evenly distributed on the mounting ring, and the sliding rods are distributed along the radial direction of the mounting ring.

[0007] Further technical solution: A second telescopic member pointing to the base is fixedly installed on the surface of the rotating plate close to the base, and a detection head is fixedly installed on the output end of the second telescopic member. The detection head is used in conjunction with a detection base plate fixedly installed on the support tube.

[0008] Further technical solution: The power assembly includes a first rotating power component, which is fixedly mounted on the base and located in the support tube. The axis of the output shaft of the first rotating power component and the axis of the mounting ring are located on the same straight line. A winding disk is fixedly mounted on the end of the output shaft of the first rotating power component. A groove is provided on the side of the winding disk and a plurality of groups of spaced-apart pull wires are fixedly connected in the groove. The number of pull wires is the same as the number of sliding rods. The pull wires pass through the side wall of the support tube, and the end of the pull wire away from the winding disk is fixedly connected to the end of the corresponding sliding rod.

[0009] Further technical solution: The power assembly also includes elastic parts, which are arranged in multiple groups. The elastic parts are fixedly installed in the mounting ring and distributed around the sliding rod. The end of the elastic part away from the mounting ring is fixedly connected to the positioning rod.

[0010] Further technical solution: The lifting assembly includes a third rotating power component, which is fixedly mounted on the rotating plate. A screw rod is fixedly connected to the end of the output shaft of the third rotating power component. The screw rod passes through the lifting frame and is rotatably connected to the lifting frame. A U-shaped fixed frame is fixedly mounted on the rotating plate. The fixed frame is in sliding contact with the lifting frame and the end of the screw rod is rotatably connected to the fixed frame.

[0011] Further technical solution: The adsorption assembly includes a first telescopic part, which is fixedly mounted on the pressure plate and is provided in multiple groups. A connecting ring is fixedly mounted on the output ends of the multiple groups of first telescopic parts. The connecting ring is connected to multiple groups of connecting pipes extending into the pressure plate. A suction cup is fixedly connected to the end of the connecting pipe. A vacuum pump is fixedly mounted on the connecting ring, and the vacuum pump is connected to the connecting ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Position the IGBT from multiple directions to improve the accuracy of IGBT positioning, achieve stable and uniform compaction of the IGBT, avoid IGBT tilt and other conditions, ensure subsequent detection so that the IGBT can operate stably and improve the accuracy of detection.

[0013] 2. Automatic unloading of IGBT after detection is realized and the IGBT after detection can be classified and stored according to the detection results of IGBT, which improves the detection speed of IGBT and is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the present invention.

[0015] Figure 2 for Figure 1 A magnified schematic diagram of the A1 region in the middle.

[0016] Figure 3 It is a top view of the mounting ring in the present invention.

[0017] Figure 4 It is a structural schematic diagram of the pressure plate in the present invention.

[0018] In the attached drawings: 1. base; 2. support tube; 3. detection bottom plate; 4. mounting ring; 5. sliding rod; 6. positioning rod; 7. spring; 8. first motor; 9. winding drum; 10. pulling wire; 11. support plate; 12. second motor; 13. rotating plate; 14. lifting frame; 15. pressing plate; 16. first electric telescopic rod; 17. connecting ring; 18. connecting pipe; 19. suction cup; 20. vacuum pump; 21. third motor; 22. screw rod; 23. second electric telescopic rod; 24. fixing frame; 25. detection head; 26. power assembly; 27. lifting assembly; 28. adsorption assembly. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] like Figure 1-Figure 4 As shown, a clamping device for IGBT testing provided by the present invention comprises a base 1, a support tube 2 is fixedly mounted on the base 1, a mounting ring 4 is fixedly mounted on the surface of the support tube 2 away from the base 1, a plurality of groups of slide bars 5 are slidably mounted on the mounting ring 4, the slide bars 5 penetrate the mounting ring 4 and are evenly distributed on the mounting ring 4, the slide bars 5 are distributed along the radial direction of the mounting ring 4, a positioning rod 6 is fixedly mounted on the end of the slide bar 5 located in the mounting ring 4, and a power assembly 26 for driving the slide bar 5 to move is provided on the base 1; An L-shaped support plate 11 is fixedly installed on the base 1, a second rotating power component is fixedly installed on the horizontal section of the support plate 11, a rotating plate 13 is fixedly installed on the end of the output shaft of the second rotating power component, one side surface of the rotating plate 13 is in sliding contact with the horizontal section of the support plate 11, a lifting frame 14 with a U-shaped structure is slidably installed on the rotating plate 13, an arc groove for the lifting frame 14 to pass through is opened in the horizontal section of the support plate 11, the lifting frame 14 passes through the rotating plate 13, and a lifting component 27 for driving the lifting frame 14 to move up and down is arranged on the rotating plate 13, a pressing plate 15 with an annular structure is fixedly installed on the end of the lifting frame 14 close to the base 1, the axis of the mounting ring 4 is located on the arc surface formed by the moving trajectory of the axis of the pressing plate 15, a groove with an annular structure is opened on the surface of the pressing plate 15 close to the base 1, and an adsorption component 28 for adsorbing the IGBT for adsorption testing is arranged on the pressing plate 15.

[0022] Specifically, in order to detect IGBT, a second telescopic member pointing to the base 1 is fixedly installed on the surface of the rotating plate 13 close to the base 1, and a detection head 25 is fixedly installed on the output end of the second telescopic member. The detection head 25 is used in conjunction with a detection base plate 3 fixedly installed on the support tube 2.

[0023] In actual application of this embodiment, the IGBT to be tested is placed on the test base plate 3. At this time, the power component 26 drives the sliding rod 5 to move inward at the same time, so that the positioning rod 6 pushes the IGBT to move and position the IGBT. The IGBT is positioned from multiple directions by the positioning rod 6, so as to improve the accuracy of positioning and avoid lateral movement during subsequent IGBT testing. After the positioning is completed, the second rotating power component drives the rotating plate 13 to rotate, so that the axis of the pressing plate 15 is in line with the axis of the mounting ring 4. At this time, the lifting component 27 drives the pressing plate 15 to move downward through the lifting frame 14, and the pressing plate 15 presses the IGBT downward. The axis of the pressing plate 15 is in line with the axis of the mounting ring 4, which can achieve stable and uniform compaction of the IGBT, avoid other conditions such as tilting of the IGBT, ensure that the IGBT can run stably in subsequent testing, and improve the testing accuracy. The accuracy of the measurement is improved, and then the second telescopic member drives the detection head 25 to move downward and contact the IGBT, thereby realizing the detection of the IGBT. After the detection is completed, the positioning rod 6 returns to its original position, and the IGBT is adsorbed by the adsorption component 28. At the same time, the lifting component 27 drives the pressure plate 15 to move upward. If the detection result of the IGBT is unqualified, the second rotating power member drives the rotating plate 13 to rotate at this time, so that the IGBT moves to the top of the unqualified IGBT storage container, and then the adsorption of the IGBT by the adsorption component 28 is released, so that the unqualified IGBT enters the container. If the detection result of the IGBT is qualified, the qualified IGBT enters another group of containers, thereby realizing automatic unloading after the IGBT detection and being able to classify and store the detected IGBT according to the detection result of the IGBT, thereby improving the detection speed of the IGBT and facilitating use.

[0024] In an example of the present embodiment, the second rotating power component is the second motor 12, and of course it can also be other components such as a hydraulic motor that can output rotational power. The second motor 12 drives the rotating plate 13 to rotate. The second telescopic component is the second electric telescopic rod 23, and of course it can also be other components such as a hydraulic cylinder that can actively change the length. The second electric telescopic rod 23 drives the detection head 25 to move up and down.

[0025] like Figure 1 , Figure 2 As shown, a clamping device for IGBT testing provided by the present invention, the power assembly 26 includes a first rotating power member, the first rotating power member is fixedly mounted on the base 1 and is located in the support tube 2, the axis of the output shaft of the first rotating power member and the axis of the mounting ring 4 are located on the same straight line, a winding drum 9 is fixedly mounted on the end of the output shaft of the first rotating power member, a groove is provided on the side of the winding drum 9 and a plurality of groups of spaced apart pull wires 10 are fixedly connected in the groove, the number of the pull wires 10 is the same as the number of the slide rods 5, the pull wires 10 pass through the side wall of the support tube 2, and the end of the pull wire 10 away from the winding drum 9 is fixedly connected to the end of the corresponding slide rod 5.

[0026] Specifically, in order to restore the slide rod 5 to its original position, the power assembly 26 also includes an elastic member, which is provided in multiple groups. The elastic members are fixedly installed in the mounting ring 4 and distributed around the slide rod 5. The end of the elastic member away from the mounting ring 4 is fixedly connected to the positioning rod 6.

[0027] During actual application of this embodiment, the first rotating power component drives the winding drum 9 to rotate, and the winding drum 9 reels the pull wire 10, so that the pull wire 10 can pull the slide bar 5 and move inward at the same time, thereby enabling the positioning rod 6 to position the IGBT. When the positioning rod 6 moves inward, it stretches the elastic component. After subsequent detection is completed, the first rotating power component rotates in the opposite direction, so that the winding drum 9 releases the pull wire 10. At this time, under the action of the elastic component, the positioning rod 6 and the slide bar 5 move outward to return to their original positions, which is convenient for subsequent use.

[0028] In one embodiment of the present invention, the first rotating power component is a first motor 8, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The first motor 8 drives the positioning rod 6 to move inward through a pull wire 10, thereby realizing IGBT positioning. The elastic component is a spring 7, and of course it can also be other elastic components such as an elastic ball. The positioning rod 6 can be returned to its original position through the spring 7.

[0029] like Figure 1As shown, a clamping device for IGBT testing provided by the present invention, the lifting assembly 27 includes a third rotating power member, the third rotating power member is fixedly mounted on the rotating plate 13, a screw rod 22 is fixedly connected to the end of the output shaft of the third rotating power member, the screw rod 22 passes through the lifting frame 14 and is rotatably connected to the lifting frame 14, a U-shaped fixing frame 24 is fixedly mounted on the rotating plate 13, the fixing frame 24 is in sliding contact with the lifting frame 14 and the end of the screw rod 22 is rotatably connected to the fixing frame 24.

[0030] In actual application of this embodiment, the third rotating power member drives the screw rod 22 to rotate, which can then drive the lifting frame 14 to move, and the lifting frame 14 drives the pressure plate 15 to move downward to achieve the compression of the IGBT. The direction of movement of the pressure plate 15 is changed by changing the rotation direction of the output shaft of the third rotating power member, and the movement and compression of the pressure plate 15 can be stably controlled by the screw rod 22, thereby ensuring the stability and accuracy of subsequent detection.

[0031] In an example of the present invention, the third rotating power component is a third motor 21 , and of course it can also be other components capable of outputting rotating power, such as a hydraulic motor. The third motor 21 drives the pressure plate 15 to move up and down through the screw rod 22 .

[0032] like Figure 1 , Figure 4 As shown, a clamping device for IGBT testing provided by the present invention, the adsorption assembly 28 includes a first telescopic member, the first telescopic member is fixedly mounted on the pressure plate 15 and is provided in multiple groups, a connecting ring 17 is fixedly mounted on the output ends of the multiple groups of first telescopic members, the connecting ring 17 is connected with multiple groups of connecting pipes 18 extending into the pressure plate 15, the end of the connecting pipe 18 is fixedly connected with a suction cup 19, the connecting ring 17 is fixedly mounted with a vacuum pump 20, and the vacuum pump 20 is connected to the connecting ring 17.

[0033] In actual application of this embodiment, after the detection is completed, the second telescopic member drives the connecting ring 17 to move downward, so that the suction cup 19 is in close contact with the surface of the IGBT, and then the air in the connecting ring 17 is extracted by the vacuum pump 20, so that the suction cup 19 is in a negative pressure state, and then the IGBT can be adsorbed, which is convenient for the subsequent movement of the IGBT.

[0034] In an example of the present invention, the first telescopic member is a first electric telescopic rod 16, and of course, it can also be other components that can actively change the length, such as a hydraulic cylinder. The first electric telescopic rod 16 drives the suction cup 19 to move up and down.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A clamping device for IGBT testing, comprising a base (1), characterized in that: The base (1) is fixedly mounted with a support tube (2); a mounting ring (4) is fixedly mounted on a surface of the support tube (2) away from the base (1); a plurality of groups of slide bars (5) are slidably mounted on the mounting ring (4); positioning rods (6) are fixedly mounted on the ends of the slide bars (5) located inside the mounting ring (4); and a power assembly (26) for driving the slide bars (5) to move is provided on the base (1); An L-shaped support plate (11) is fixedly mounted on the base (1), a second rotating power component is fixedly mounted on the horizontal section of the support plate (11), a rotating plate (13) is fixedly mounted on the end of the output shaft of the second rotating power component, a side surface of the rotating plate (13) is in sliding contact with the horizontal section of the support plate (11), a U-shaped lifting frame (14) is slidably mounted on the rotating plate (13), the lifting frame (14) passes through the rotating plate (13), a lifting component (27) for driving the lifting frame (14) to move up and down is provided on the rotating plate (13), a pressing plate (15) with an annular structure is fixedly mounted on the end of the lifting frame (14) close to the base (1), a groove with an annular structure is provided on the surface of the pressing plate (15) close to the base (1), and an adsorption component (28) for adsorbing an IGBT for adsorption testing is provided on the pressing plate (15).

2. The IGBT test clamping device according to claim 1, characterized in that: A plurality of groups of the sliding rods (5) penetrate the mounting ring (4) and are evenly distributed on the mounting ring (4), and the sliding rods (5) are distributed along the radial direction of the mounting ring (4).

3. The IGBT test clamping device according to claim 1, characterized in that: A second telescopic member pointing towards the base (1) is fixedly mounted on the surface of the rotating plate (13) close to the base (1), and a detection head (25) is fixedly mounted on the output end of the second telescopic member. The detection head (25) is used in conjunction with a detection base plate (3) fixedly mounted on the support tube (2).

4. The IGBT test clamping device according to claim 1, characterized in that: The power assembly (26) comprises a first rotating power member, which is fixedly mounted on the base (1) and located in the support tube (2), the axis of the output shaft of the first rotating power member and the axis of the mounting ring (4) are located on the same straight line, a winding drum (9) is fixedly mounted on the end of the output shaft of the first rotating power member, a groove is provided on the side of the winding drum (9), and a plurality of groups of pull wires (10) distributed at intervals are fixedly connected in the groove, the number of the pull wires (10) is the same as the number of the slide bars (5), the pull wires (10) pass through the side wall of the support tube (2), and the end of the pull wire (10) away from the winding drum (9) is fixedly connected to the end of the corresponding slide bar (5).

5. The IGBT test clamping device according to claim 4, characterized in that: The power assembly (26) further comprises elastic members, a plurality of elastic members are provided, the elastic members are fixedly mounted in the mounting ring (4) and distributed around the slide rod (5), and the ends of the elastic members away from the mounting ring (4) are fixedly connected to the positioning rod (6).

6. The IGBT test clamping device according to claim 1, characterized in that: The lifting assembly (27) comprises a third rotating power member, the third rotating power member is fixedly mounted on the rotating plate (13), a screw rod (22) is fixedly connected to the end of the output shaft of the third rotating power member, the screw rod (22) passes through the lifting frame (14) and is rotatably connected to the lifting frame (14), a fixed frame (24) with a U-shaped structure is fixedly mounted on the rotating plate (13), the fixed frame (24) is in sliding contact with the lifting frame (14) and the end of the screw rod (22) is rotatably connected to the fixed frame (24).

7. The IGBT test clamping device according to claim 1, characterized in that: The adsorption assembly (28) comprises a first telescopic member, which is fixedly mounted on the pressure plate (15) and is provided in multiple groups. A connecting ring (17) is fixedly mounted on the output ends of the multiple groups of first telescopic members. The connecting ring (17) is connected to multiple groups of connecting pipes (18) extending into the pressure plate (15). The ends of the connecting pipes (18) are fixedly connected to suction cups (19). A vacuum pump (20) is fixedly mounted on the connecting ring (17), and the vacuum pump (20) is connected to the connecting ring (17).

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