CN112025061A

CN112025061A - Resistance welding equipment of IGBT module

Info

Publication number: CN112025061A
Application number: CN202010687404.8A
Authority: CN
Inventors: 杨种南
Original assignee: Heritage Electronic Technology Jiangsu Co ltd
Current assignee: Heritage Electronic Technology Jiangsu Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-12-04
Anticipated expiration: 2040-07-16
Also published as: CN112025061B

Abstract

The invention discloses resistance welding equipment of an IGBT module, which relates to the technical field of the IGBT module and comprises a transverse plate, wherein four corners of the bottom surface of the transverse plate are respectively and fixedly provided with a telescopic block, the length of the telescopic block can be fixed, the bottom of the telescopic block is fixedly provided with a sucking disc, the middle part of the top surface of the transverse plate is longitudinally provided with a first through groove, a thermistor is arranged in the first through groove, two sides of the top surface of the transverse plate are respectively provided with a vertical plate in a left-right sliding manner, the side wall of the vertical plate is transversely provided with a through hole, a cross rod is penetrated in the through hole in a sliding manner, a supporting block is fixedly arranged at the inner end of the cross rod, the thermistor is supported and fixed by the two supporting blocks, the outer side of the upper end of the vertical plate is fixedly provided with, resulting in a problem of deviation from the welding position.

Description

Resistance welding equipment of IGBT module

Technical Field

The invention relates to the technical field of IGBT modules, in particular to resistance welding equipment of an IGBT module.

Background

The IGBT and the insulated gate bipolar transistor are composite fully-controlled voltage-driven power semiconductor devices consisting of BJTs (bipolar transistors) and MOS (insulated gate field effect transistors), have the advantages of both high input impedance of the MOSFET and low conduction voltage drop of GTR, and have small driving power and reduced saturation voltage. The IGBT module is very suitable for being applied to the fields of current transformation systems with the direct-current voltage of 600V or more, such as alternating-current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like, and has the characteristics of energy conservation, convenience in installation and maintenance, stable heat dissipation and the like.

However, since the IGBT is a high-power semiconductor device, the power loss is large, the heating phenomenon is severe, and the overheating resistance of the IGBT is poor, and the maximum junction temperature of the IGBT is limited, and most of the IGBT cannot exceed 150 ℃, the IGBT device is not suitable for long-term operation at a high temperature, and in order to ensure long-term safe operation of the IGBT, the IGBT must be subjected to an overheating protection design while the heat dissipation capability of the IGBT is improved, and mounting a thermistor for an IGBT module is one of common overheating protection designs.

The existing thermistor is a cylinder and is easy to roll when placed, so that the welding position is deviated, and the invention provides resistance welding equipment for an IGBT module to solve the problems.

Disclosure of Invention

The invention aims to solve the problems and designs a resistance welding device of an IGBT module.

The technical scheme includes that the resistance welding equipment for the IGBT module comprises a transverse plate, four corners of the bottom surface of the transverse plate are respectively and fixedly provided with a telescopic block, the length of the telescopic block can be fixed, a sucking disc is fixedly arranged at the bottom of the telescopic block, a first through groove is longitudinally formed in the middle of the top surface of the transverse plate, a thermistor is arranged in the first through groove, vertical plates are arranged on two sides of the top surface of the transverse plate in a sliding mode, the positions of the vertical plates can be fixed, through holes are transversely formed in the side walls of the vertical plates, transverse rods penetrate through the through holes in a sliding mode, abutting blocks are fixedly arranged at the inner ends of the transverse rods, the thermistor is abutted and fixed by the two abutting blocks, and a positioning adjusting mechanism is fixedly arranged on the outer side of the.

Further, flexible piece includes the fixed block, the fixed block top is vertically seted up flutedly, it is provided with the movable block to slide in the recess, the movable block top with diaphragm fixed connection, the bottom is fixed in the recess is provided with electronic jar, electronic jar top with movable block fixed connection, fixed block bottom fixedly connected with the sucking disc.

Furthermore, the two sides of the lower end of the movable block are respectively and fixedly provided with a first sliding block, the first sliding blocks are respectively arranged in the first sliding grooves, the first sliding blocks are in sliding fit with the first sliding grooves, and the first sliding grooves are respectively and longitudinally arranged on the two sides in the groove.

Further, the riser bottom slides and sets up in spout two, spout two is transversely seted up the diaphragm top surface, it is provided with slider two to slide in the spout two, slider two with riser fixed connection, two tops of slider are provided with the elasticity screw rod, the elasticity screw rod with two screw-thread fit of slider, slider two is through screwing the elasticity screw rod supports fixedly.

Furthermore, a protection pad is fixedly arranged on one side, far away from the cross rod, of the abutting block, and the protection pad is made of rubber materials.

Furthermore, the positioning adjusting mechanism comprises an installation block, the installation block is fixedly connected with the vertical plate, a screw hole is formed in the outer side of the installation block, a screw rod is arranged in the screw hole, a second through groove is formed in the bottom surface of the installation block, the second through groove is communicated with the screw hole, the outer side of the second through groove is communicated with the outside of the screw hole, a support rod is arranged in the second through groove in a penetrating mode, the lower end of the support rod supports outside the cross rod, and the top end of the support rod is annularly and rotatably arranged on the outer wall of the screw rod.

Furthermore, an annular groove is formed in the outer wall of the screw rod, a sliding block is arranged in the annular groove in a sliding mode, and the sliding block is fixedly connected with the abutting rod.

Further, two sliding blocks III are symmetrically and fixedly arranged on two sides in the through hole, the two sliding blocks III are respectively arranged in the two sliding grooves III in a sliding mode, and the two sliding grooves III are respectively transversely arranged at the top and the bottom of the cross rod.

The thermal resistor fixing structure has the advantages that 1, through the structures of the supporting blocks, the supporting rods, the screws and the like, the thermal resistor is placed in the first through groove, the vertical plate slides to the proper position left and right, the screws are screwed inwards to drive the supporting rods to move inwards, the supporting rods extrude the transverse rods inwards, the thermal resistor is extruded and fixed by the two supporting blocks, and the thermal resistor is convenient to fix;

2. through the arranged protection pad, the protection pad can protect the thermistor, and the thermistor is prevented from being damaged due to overlarge extrusion force of the abutting block on the thermistor;

3. through the sucking disc that sets up, fixed block and movable block isotructure, the sucking disc adsorbs to be fixed on the IGBT module, according to thermistor's difference, adjusts the length of flexible piece for thermistor bottom can just contact on the IGBT module, is convenient for with on the thermistor not have skew welding on the IGBT module, has solved current thermistor and has rolled for the cylinder very easily when placing, leads to skew welding position's problem.

Drawings

Fig. 1 is a perspective view of a resistance welding apparatus of an IGBT module of the invention;

fig. 2 is a front view of a resistance welding apparatus of the IGBT module of the invention;

fig. 3 is a sectional view of a resistance welding apparatus of the IGBT module of the invention;

fig. 4 is an enlarged schematic view of part a of the resistance welding apparatus of the IGBT module of the invention;

fig. 5 is a sectional view of the expansion block in the resistance welding apparatus of the IGBT module of the present invention. In the figure, 1, a screw; 2. mounting blocks; 3. a vertical plate; 4. a second through groove; 5-a resisting rod; 6-a transverse plate; 7. a telescopic block; 8. a through hole; 9. a cross bar; 10. a third chute; 11. a protection pad; 12. a resisting block; 13. a second chute; 14. a third sliding block; 15. tightening and loosening the screw rod; 16. a second sliding block; 17. an annular groove; 18. a slider; 19. a movable block; 20. a fixed block; 21. a first sliding block; 22. a first sliding chute; 23. a screw hole; 24. a groove; 25. an electric cylinder; 26. a suction cup; 27. a thermistor; 28. and a first through groove.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings, and referring to fig. 1-5, a resistance welding device for an IGBT module comprises a transverse plate 6, four corners of the bottom surface of the transverse plate 6 are respectively and fixedly provided with a telescopic block 7, the length of the telescopic block 7 can be fixed, the bottom of the telescopic block 7 is fixedly provided with a sucker 26, the middle of the top surface of the transverse plate 6 is longitudinally provided with a first through groove 28, a thermistor 27 is arranged in the first through groove 28, two sides of the top surface of the transverse plate 6 are respectively provided with a vertical plate 3 in a left-right sliding manner, the position of the vertical plate 3 can be fixed, the side wall of the vertical plate 3 is transversely provided with a through hole 8, a transverse rod 9 is slidably arranged.

The fixed positioning adjustment mechanism that is provided with in 3 upper end outsides of riser, positioning adjustment mechanism are used for supporting the position of fixed horizontal pole 9, and the fixed slider three 14 that is provided with of bilateral symmetry in the through-hole 8, and two sliders three 14 slide respectively and set up in two spouts three 10, and two spouts three 10 transversely are seted up respectively in horizontal pole 9 top and bottom, support the fixed protection pad 11 that is provided with in one side that the horizontal pole 9 was kept away from to piece 12, and protection pad 11 adopts the rubber material to make.

The telescopic block 7 comprises a fixed block 20, a groove 24 is longitudinally formed in the top of the fixed block 20, a movable block 19 is slidably arranged in the groove 24, the top end of the movable block 19 is fixedly connected with the transverse plate 6, an electric cylinder 25 is fixedly arranged at the bottom in the groove 24, the top end of the electric cylinder 25 is fixedly connected with the movable block 19, and a sucker 26 is fixedly connected to the bottom of the fixed block 20.

The positioning and adjusting mechanism comprises an installation block 2, the installation block 2 is fixedly connected with a vertical plate 3, a screw hole 23 is arranged on the outer side of the installation block 2, a screw rod 1 is arranged in the screw hole 23, a through groove two 4 is arranged on the bottom surface of the installation block 2, the through groove two 4 is communicated with the screw hole 23, the outer side of the through groove two 4 is communicated, a supporting rod 5 is arranged in the through groove two 4 in a penetrating manner, the lower end of the supporting rod 5 is supported outside a cross rod 9, the top end of the supporting rod 5 is annularly and rotatably arranged on the outer wall of the screw rod 1, an annular groove 17 is arranged on the outer wall of the screw rod 1, a sliding block 18 is arranged in the annular groove 17 in a sliding manner, the sliding block 18 is fixedly connected with the supporting rod 5, the bottom of the vertical plate 3 is arranged in a sliding groove two 13, the sliding groove two 13 is transversely arranged on, the second sliding block 16 is supported and fixed by screwing the elastic screw rod 15.

Through the arrangement of the abutting blocks 12, the abutting rods 5, the screw rods 1 and other structures, the thermistor 27 is placed in the through groove I28, the vertical plate 3 slides to the proper position left and right, the position of the vertical plate 3 is fixed by screwing the elastic screw rods 15, the screw rods 1 are screwed inwards, the screw rods 1 drive the abutting rods 5 to move inwards, the abutting rods 5 extrude the cross rod 9 inwards, the thermistor 27 is extruded and fixed by the two abutting blocks 12, and the thermistor 27 is convenient to fix; through the arranged protection pad 11, the protection pad 11 can protect the thermistor 27, and the thermistor 27 is prevented from being damaged due to overlarge extrusion force of the abutting block 12 on the thermistor 27;

through the arrangement of the structures such as the sucking disc 26, the fixed block 20 and the movable block 19, the sucking disc 26 is fixedly adsorbed on the IGBT module, the electric cylinder 25 is started to stretch according to the difference of the thermistor 27, the electric cylinder 25 adjusts the depth of the movable block 19 inserted into the groove 24, so that the bottom of the thermistor 27 can be just contacted with the IGBT module, the thermistor 27 can be conveniently welded on the IGBT module without deviation, and the problem that the existing thermistor is a cylinder and is easy to roll when placed, so that the welding position is deviated is solved;

as the improvement of the technical scheme, two sides of the lower end of the movable block 19 are respectively and fixedly provided with a first sliding block 21, the two first sliding blocks 21 are respectively arranged in two first sliding grooves 22, the first sliding blocks 21 are in sliding fit with the first sliding grooves 22, and the two first sliding grooves 22 are respectively and longitudinally arranged on two sides in the groove 24.

Through the arrangement of the first sliding block 21 and the first sliding groove 22, the movable block 19 can be ensured to stably move up and down in the groove 24, and meanwhile, the movable block 19 is prevented from slipping off the groove 24.

When the thermal resistor 27 is used, the thermal resistor 27 is placed in the through groove I28, the vertical plate 3 slides to a proper position left and right, the position of the vertical plate 3 is fixed by screwing the tightening screw 15, the screw 1 is screwed inwards, the screw 1 drives the abutting rod 5 to move inwards, the abutting rod 5 extrudes the cross rod 9 inwards, the thermal resistor 27 is extruded and fixed by the two abutting blocks 12, and the thermal resistor 27 is convenient to fix; through the arranged protection pad 11, the protection pad 11 can protect the thermistor 27, and the thermistor 27 is prevented from being damaged due to overlarge extrusion force of the abutting block 12 on the thermistor 27; the sucker 26 is fixedly adsorbed on the IGBT module, the electric cylinder 25 is started to stretch according to the difference of the thermistors 27, the electric cylinder 25 adjusts the depth of the movable block 19 inserted into the groove 24, so that the bottom of the thermistors 27 can be just contacted with the IGBT module, the thermistors 27 can be conveniently welded on the IGBT module without deviation, and the problem that the existing thermistors are cylindrical and are easy to roll when placed, so that the welding positions are deviated is solved; the arrangement of the first sliding block 21 and the first sliding groove 22 ensures that the movable block 19 can stably move up and down in the groove 24, and simultaneously prevents the movable block 19 from slipping off the groove 24.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.

Claims

1. The resistance welding equipment for the IGBT module comprises a transverse plate (6) and is characterized in that four corners of the bottom surface of the transverse plate (6) are respectively and fixedly provided with a telescopic block (7), the length of the telescopic block (7) can be fixed, the bottom of the telescopic block (7) is fixedly provided with a sucker (26), the middle part of the top surface of the transverse plate (6) is longitudinally provided with a first through groove (28), a thermistor (27) is arranged in the first through groove (28), two sides of the top surface of the transverse plate (6) are respectively provided with a vertical plate (3) in a left-right sliding mode, the position of the vertical plate (3) can be fixed, the side wall of the vertical plate (3) is transversely provided with a through hole (8), a transverse rod (9) is arranged in the through hole (8) in a sliding mode in a penetrating mode, a support block (12) is fixedly arranged, the outer side of the upper end of the vertical plate (3) is fixedly provided with a positioning adjusting mechanism which is used for abutting against and fixing the position of the cross rod (9).

2. The resistance welding equipment for the IGBT module according to claim 1, wherein the telescopic block (7) comprises a fixed block (20), a groove (24) is longitudinally formed in the top of the fixed block (20), a movable block (19) is slidably arranged in the groove (24), the top end of the movable block (19) is fixedly connected with the transverse plate (6), an electric cylinder (25) is fixedly arranged at the bottom in the groove (24), the top end of the electric cylinder (25) is fixedly connected with the movable block (19), and the sucking disc (26) is fixedly connected with the bottom of the fixed block (20).

3. The resistance welding apparatus of an IGBT module according to claim 2, characterized in that: the two sides of the lower end of the movable block (19) are respectively fixedly provided with a first sliding block (21), the first sliding blocks (21) are respectively arranged in two first sliding grooves (22), the first sliding blocks (21) are in sliding fit with the first sliding grooves (22), and the first sliding grooves (22) are respectively and longitudinally arranged on the two sides in the groove (24).

4. The resistance welding apparatus of an IGBT module according to claim 1, characterized in that: riser (3) bottom is slided and is set up in spout two (13), spout two (13) are transversely seted up diaphragm (6) top surface, it is provided with slider two (16) to slide in spout two (13), slider two (16) with riser (3) fixed connection, slider two (16) top is provided with elasticity screw rod (15), elasticity screw rod (15) with slider two (16) screw-thread fit, slider two (16) are through screwing elasticity screw rod (15) support fixedly.

5. The resistance welding apparatus of an IGBT module according to claim 1, characterized in that: one side, far away from the cross rod (9), of the abutting block (12) is fixedly provided with a protection pad (11), and the protection pad (11) is made of rubber materials.

6. The resistance welding apparatus of an IGBT module according to claim 3, characterized in that: positioning adjustment mechanism includes installation piece (2), installation piece (2) with riser (3) fixed connection, installation piece (2) outside is provided with screw (23), be provided with screw rod (1) in screw (23), installation piece (2) bottom surface is provided with logical groove two (4), lead to groove two (4) with screw (23) are to leading to, lead to groove two (4) outside and link up, wear to be equipped with in leading to groove two (4) and support pole (5), support pole (5) lower extreme supports outside horizontal pole (9), support pole (5) top annular rotates the setting and is in screw rod (1) outer wall.

7. The resistance welding apparatus of an IGBT module according to claim 6, characterized in that: an annular groove (17) is formed in the outer wall of the screw rod (1), a sliding block (18) is arranged in the annular groove (17) in a sliding mode, and the sliding block (18) is fixedly connected with the abutting rod (5).

8. The resistance welding apparatus of an IGBT module according to claim 6, characterized in that: and three sliding blocks (14) are symmetrically and fixedly arranged on two sides in the through hole (8), the three sliding blocks (14) are respectively arranged in the three sliding grooves (10) in a sliding manner, and the three sliding grooves (10) are respectively and transversely arranged at the top and the bottom of the cross rod (9).