Pressing and positioning tool for IGBT welding and using method of pressing and positioning tool

Abstract

The invention belongs to the technical field of IGBT welding, and particularly relates to a pressing and positioning tool for IGBT welding and a using method thereof.The tool comprises a bottom plate, a positioning assembly, a driving assembly, a conveying mechanism, a product assembly and a pressing mechanism, the positioning assembly and the driving assembly are arranged on the bottom plate, the conveying mechanism is installed on the positioning assembly, and the product assembly is installed on the pressing mechanism; the conveying mechanism is used for conveying the product assembly, and the pressing mechanism is arranged on the product assembly. The product assembly comprises a supporting plate and a plurality of IGBT modules arranged on the supporting plate, a hollow groove is formed in the pressing mechanism, and the hollow groove directly faces welding positions of the IGBT modules; the driving assembly is connected with the pressing mechanism, and the driving assembly is linked with the pressing mechanism to move and is used for pressing the plurality of IGBT modules on the positioning assembly so as to press and position the IGBT modules; according to the device, a plurality of IGBT modules can be pressed and positioned at the same time, the welding efficiency is improved, the effect of adjusting the pressure of a product assembly can be achieved, the performance of a welded product is guaranteed, and the stability during welding is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of IGBT welding, and in particular relates to a pressing and positioning tool for IGBT welding and a use method thereof. Background Art

[0002] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers.

[0003] IGBT (insulated gate bipolar transistor) is the core component of power electronic systems, with independent power conversion function. With the continuous upgrading of strategic industries such as new energy, rail transportation, and smart grid, the requirements for miniaturization, modularization, and high power density of IGBT modules have been put forward. The IGBT module uses electrical power terminals and high-power semiconductor chip circuit structures to connect through ultrasonic welding, which can achieve close contact at the atomic level.

[0004] Before ultrasonic welding of the IGBT module, the IGBT module needs to be pressed and positioned. The inventors have found that the existing pressing and positioning tooling has at least the following technical problems:

[0005] On the one hand, the existing tooling can only press and position a single IGBT module, and cannot press and position multiple IGBT modules at the same time, which reduces welding efficiency and accuracy; on the other hand, the insufficient pressing force of the tooling on the IGBT module can easily lead to cold welding or loose welding during welding, affecting the performance of the welded product.

[0006] Based on this, it is necessary to improve the defects of the prior art to overcome the deficiencies in practical applications. Summary of the invention

[0007] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide a clamping and positioning tool for IGBT welding and a method of using the same that meets one or more of the above-mentioned needs.

[0008] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0009] The present invention provides a clamping and positioning tool for IGBT welding, characterized in that it comprises a base plate, a positioning assembly, a driving assembly, a conveying mechanism, a product assembly and a clamping mechanism, wherein the positioning assembly and the driving assembly are arranged on the base plate, the conveying mechanism is installed on the positioning assembly, the conveying mechanism is used to convey the product assembly, and the clamping mechanism is arranged on the product assembly;

[0010] The product assembly includes a support plate and a plurality of IGBT modules arranged on the support plate, and the clamping mechanism is provided with a hollow groove, and the hollow groove is directly opposite to the welding position arranged on the IGBT module;

[0011] The driving component is connected to the clamping mechanism, and the driving component is linked to the clamping mechanism to move, so as to clamp a plurality of the IGBT modules against the positioning component to clamp and position the IGBT modules.

[0012] As a preferred solution, the driving assembly includes a plurality of cylinders evenly arranged on the base plate, the cylinders are connected to a fixing plate, and the fixing plate is connected to the clamping mechanism.

[0013] As a preferred solution, there are several clamping mechanisms, each of which includes a clamping plate and a clamping assembly. The clamping plate is provided with a hollow groove, the clamping assembly is nested in the hollow groove, and the clamping assembly abuts against the IGBT module.

[0014] As a preferred embodiment, the clamping assembly includes a fixed block, a spring, a guide block, a first pressure block and a second pressure block. The guide block is connected to the pressure plate, and a spring is installed in the guide block. One end of the spring is connected to the fixed block, and the other end is connected to the first pressure block or the second pressure block. The first pressure block and the second pressure block are respectively abutted against the IGBT module.

[0015] As a preferred embodiment, the positioning assembly includes a base, a positioning seat and a positioning groove. The base is provided with several positioning seats and positioning grooves, and the positioning grooves are arranged one-to-one with the IGBT modules. The base is provided with a first positioning pin, and the first positioning pin is used to position the support plate. The positioning seat is provided with a second positioning pin, and the second positioning pin is used to position the IGBT module.

[0016] As a preferred solution, the support plate is provided with an avoidance groove, and after the IGBT module collides with the positioning groove, the support plate is separated from the IGBT module.

[0017] As a preferred embodiment, the conveying mechanism includes a motor, a conveying arm, a pulley, a conveyor belt and a guide assembly. The conveying arm is connected to the conveyor belt, the product assembly is placed on the conveyor belt, and the motor is installed on the conveying arm and is connected to the conveyor belt in a transmission manner.

[0018] As a preferred solution, the guide assembly includes a guide column and an elastic member, the conveying arm moves up and down along the guide column, and the elastic member contacts the conveying arm to provide a rebound force for the conveying arm.

[0019] As a preferred solution, a blocking component is provided on the bottom plate, and the blocking component is in contact with the conveying mechanism to limit the moving position of the conveying mechanism.

[0020] The present invention also provides a method for using a clamping and positioning tool for IGBT welding, using the clamping and positioning tool as described in any of the above schemes, comprising the following steps:

[0021] S1. The product components are transported to the welding position through the conveying mechanism;

[0022] S2, driving the pressing mechanism to move through the driving assembly, so as to press the product assembly downward onto the conveying mechanism;

[0023] S3, the conveying mechanism continues to move downward to disengage the linkage support plate from the IGBT module, so that the IGBT module is installed in the positioning assembly;

[0024] S4. Pressing the plurality of IGBT modules onto the positioning assembly through a pressing mechanism to press and position the plurality of IGBT modules.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention provides a pressing and positioning tool for IGBT welding, which can not only realize the simultaneous pressing and positioning of multiple IGBT modules, thereby improving welding efficiency and precision and avoiding the phenomenon of cold welds or loose welding during welding; but also realize the function of adjustable pressure on product components, thereby avoiding the phenomenon of cold welds or loose welding during welding, thereby ensuring the performance of welding products and improving the stability during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 2 is a schematic structural diagram of a pressing and positioning tool according to an embodiment of the present invention;

[0029] Figure 2 is an exploded view of a pressing and positioning tooling according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the structural layout of the positioning assembly and the driving assembly of an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of a conveying mechanism according to an embodiment of the present invention;

[0032] Figure 5 is a structural schematic diagram of a clamping mechanism according to an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of the structure of a product component of an embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of a positioning assembly according to an embodiment of the present invention;

[0035] In the figure: 1 bottom plate, 2 positioning assembly, 21 base, 211 first positioning pin, 22 positioning seat, 221 second positioning pin, 23 positioning groove, 3 driving assembly, 31 cylinder, 32 fixed plate, 4 conveying mechanism, 41 motor, 42 conveying arm, 43 pulley, 44 conveyor belt, 45 guide assembly, 451 guide column, 452 elastic member, 5 product assembly, 51 support plate, 52 IGBT module, 6 clamping mechanism, 61 pressure plate, 611 hollow groove, 62 clamping assembly, 621 fixed block, 622 spring, 623 guide block, 624 first pressure block, 625 second pressure block, 7 blocking assembly. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In the description of the embodiments of the present application, the terms "upper", "lower", "front", "rear", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", etc. are only used to distinguish in the description and have no special meaning.

[0038] According to some embodiments of the present application, please refer to Figures 1 to 7As shown, a clamping and positioning tool for IGBT welding is provided, including a base plate 1, a positioning component 2, a driving component 3, a conveying mechanism 4, a product component 5 and a clamping mechanism 6. The positioning component 2 and the driving component 3 are arranged on the base plate 1, and the conveying mechanism 4 is installed on the positioning component 2. The conveying mechanism 4 is used to convey the product component 5. The clamping mechanism 6 is arranged on the product component 5. The product component 5 includes a support plate 51 and a plurality of IGBT modules 52 arranged on the support plate 51; the clamping mechanism 6 is provided with a hollow groove, and the hollow groove is opposite to the welding position arranged on the IGBT module 52; the driving component 3 is connected to the clamping mechanism 6, and the driving component 3 is linked to the clamping mechanism 6 to move, so as to clamp the plurality of IGBT modules 52 on the positioning component 2 to clamp and position the IGBT module 52.

[0039] In some embodiments of the present application, the driving assembly 3 includes a plurality of cylinders 31 evenly distributed on the base plate 1 , the cylinders 31 are connected to a fixing plate 32 , and the fixing plate 32 is connected to the clamping mechanism 6 .

[0040] Specifically, cylinders 31 are provided on the left and right sides of the positioning assembly 2, the number of cylinders on each side is set to three, and the output ends of the cylinders on the same side are commonly connected to the fixed plate 32, and the clamping mechanism 6 is commonly connected to the fixed plates 32 on the left and right sides to ensure that the clamping mechanism 6 moves up and down.

[0041] In some embodiments of the present application, there are several clamping mechanisms 6 , each of which includes a clamping plate 61 and a clamping assembly 62 . The clamping plate 61 is provided with a hollow groove, and the clamping assembly 62 is nested in the hollow groove. The clamping assembly 62 abuts against the IGBT module 52 .

[0042] In a specific embodiment, three clamping mechanisms 6 are provided, and the two ends of the three clamping mechanisms 6 are respectively connected to two fixed plates 32, so that the three clamping mechanisms 6 can keep moving up and down synchronously and keep the height flush, avoiding the phenomenon of inconsistent clamping force when clamping product components, affecting the welding effect.

[0043] Furthermore, the clamping assembly 62 includes a fixed block 621, a spring 622, a guide block 623, a first clamp 624 and a second clamp 625. The guide block 623 is connected to the pressure plate 61. The spring 622 is installed in the guide block 623. One end of the spring 622 is connected to the fixed block 621, and the other end is connected to the first clamp 624 or the second clamp 625. The first clamp 624 and the second clamp 625 are respectively abutted against the IGBT module 52.

[0044] Furthermore, the upper end of the spring 622 is connected to a bolt, and the size of the spring force can be adjusted by rotating the bolt, so that the force of the first pressing block 624 and / or the second pressing block 625 when pressing downward can further adjust the clamping force on the IGBT module.

[0045] Since the IGBT module has a pressing position and a welding position, and there is a height difference between the pressing position and the welding position, in order to ensure the pressing force on the IGBT module, the first pressing block 624 is pressed on the frame of the IGBT module, and the second pressing block 625 is pressed on the substrate of the IGBT module.

[0046] In some embodiments of the present application, the positioning assembly 2 includes a base 21, a positioning seat 22 and a positioning groove 23. The base 21 is provided with several positioning seats 22 and positioning grooves 23, and the positioning grooves 23 are arranged one-to-one corresponding to the IGBT module 52; the base 21 is provided with a first positioning pin 211, and the first positioning pin 211 is used to position the support plate 51. The positioning seat 22 is provided with a second positioning pin 221, and the second positioning pin 221 is used to position the IGBT module 52.

[0047] Furthermore, an avoidance groove is provided on the support plate 51 , and after the IGBT module 52 contacts the positioning groove 23 , the support plate 51 and the IGBT module 52 are separated.

[0048] In some embodiments of the present application, the conveying mechanism 4 includes a motor 41, a conveying arm 42, a pulley 43, a conveyor belt 44 and a guide assembly 45. The conveying arm 42 is connected to the conveyor belt 44, and the product assembly 5 is placed on the conveyor belt 44. The motor 41 is installed on the conveying arm 42 and is connected to the conveyor belt 44 in transmission.

[0049] Furthermore, the guide assembly 45 includes a guide column 451 and an elastic member 452 . The conveying arm 42 moves up and down along the guide column 451 . The elastic member 452 contacts the conveying arm 42 to provide a rebound force for the conveying arm 42 .

[0050] In some embodiments of the present application, a blocking component 7 is provided on the bottom plate 1, and the blocking component 7 is in contact with the conveying mechanism 4 to limit the moving position of the conveying mechanism 4. The blocking component 7 is in contact with the end of the conveying mechanism 4 to limit the position of the conveying mechanism 4.

[0051] A pressing and positioning tool for IGBT welding provided in accordance with an embodiment of the present application can not only realize the simultaneous pressing and positioning of multiple IGBT modules, thereby improving welding efficiency and accuracy and avoiding the phenomenon of cold welds or loose welding during welding; it can also realize the function of adjustable pressure on product components, thereby avoiding the phenomenon of cold welds or loose welding during welding, thereby ensuring the performance of welding products and improving the stability during welding.

[0052] According to some embodiments of the present application, a method for using a pressing and positioning tool for IGBT welding is also provided, and using the pressing and positioning tool as described above comprises the following steps:

[0053] S1. The product assembly is conveyed to the welding position by the conveying mechanism, and the conveying mechanism contacts the blocking assembly;

[0054] S2, driving the pressing mechanism to move by the driving assembly, so as to press the product assembly downward on the conveying mechanism, so that the conveying mechanism moves downward along the guide column;

[0055] S3, the conveying mechanism continues to move downward to link the IGBT module to abut against the positioning assembly, and the support plate is separated from the IGBT module, so that the IGBT module is installed in the positioning assembly;

[0056] S4. The driving assembly continues to be pressed downward, and the plurality of IGBT modules are pressed against the positioning assembly by the pressing mechanism to press and position the plurality of IGBT modules.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist at the same time, and Y exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] The above description is only a detailed description of the preferred embodiments and principles of the present application. For ordinary technicians in this field, there will be changes in the specific implementation methods based on the ideas provided by the present invention, and these changes should also be regarded as the scope of protection of the present application.

Claims

1. A clamping and positioning tool for IGBT welding, characterized in that: It includes a bottom plate, a positioning assembly, a driving assembly, a conveying mechanism, a product assembly and a pressing mechanism, wherein the positioning assembly and the driving assembly are arranged on the bottom plate, the conveying mechanism is installed on the positioning assembly, the conveying mechanism is used to convey the product assembly, and the pressing mechanism is arranged on the product assembly; The product assembly includes a support plate and a plurality of IGBT modules arranged on the support plate, and the clamping mechanism is provided with a hollow groove, and the hollow groove is directly opposite to the welding position arranged on the IGBT module; The driving component is connected to the clamping mechanism, and the driving component is linked to the clamping mechanism to move, so as to clamp a plurality of the IGBT modules against the positioning component to clamp and position the IGBT modules.

2. The clamping and positioning tool for IGBT welding according to claim 1, characterized in that: The driving assembly includes a plurality of cylinders uniformly arranged on the bottom plate, the cylinders are connected to a fixing plate, and the fixing plate is connected to the pressing mechanism.

3. The clamping and positioning tool for IGBT welding according to claim 1, characterized in that: There are several clamping mechanisms, each of which includes a clamping plate and a clamping assembly. The clamping plate is provided with a hollow groove, the clamping assembly is nested in the hollow groove, and the clamping assembly abuts against the IGBT module.

4. The clamping and positioning tool for IGBT welding according to claim 3, characterized in that: The clamping assembly includes a fixed block, a spring, a guide block, a first pressure block and a second pressure block. The guide block is connected to the pressure plate. A spring is installed in the guide block. One end of the spring is connected to the fixed block, and the other end is connected to the first pressure block or the second pressure block. The first pressure block and the second pressure block are respectively abutted against the IGBT module.

5. The clamping and positioning tool for IGBT welding according to claim 1, characterized in that: The positioning assembly includes a base, a positioning seat and a positioning groove. The base is provided with a plurality of positioning seats and positioning grooves, and the positioning grooves are arranged one-to-one with the IGBT modules. The base is provided with a first positioning pin, and the first positioning pin is used to position the support plate. The positioning seat is provided with a second positioning pin, and the second positioning pin is used to position the IGBT module.

6. The clamping and positioning tool for IGBT welding according to claim 5, characterized in that: The support plate is provided with an avoidance groove, and after the IGBT module collides with the positioning groove, the support plate and the IGBT module are separated.

7. The clamping and positioning tool for IGBT welding according to claim 1, characterized in that: The conveying mechanism includes a motor, a conveying arm, a pulley, a conveyor belt and a guide assembly. The conveying arm is connected to the conveyor belt, and the product assembly is placed on the conveyor belt. The motor is installed on the conveying arm and is connected to the conveyor belt in a transmission manner.

8. The clamping and positioning tool for IGBT welding according to claim 7, characterized in that: The guide assembly comprises a guide column and an elastic member. The conveying arm moves up and down along the guide column. The elastic member contacts the conveying arm to provide a rebound force for the conveying arm.

9. The clamping and positioning tool for IGBT welding according to claim 1, characterized in that: A blocking component is disposed on the bottom plate, and the blocking component is in contact with the conveying mechanism to limit the moving position of the conveying mechanism.

10. A method for using a clamping and positioning tool for IGBT welding, characterized in that: The use of the pressing and positioning tool as described in any one of claims 1 to 9 comprises the following steps: S1. The product components are transported to the welding position through the conveying mechanism; S2, driving the pressing mechanism to move through the driving assembly, so as to press the product assembly downward onto the conveying mechanism; S3, the conveying mechanism continues to move downward to disengage the linkage support plate from the IGBT module, so that the IGBT module is installed in the positioning assembly; S4. Pressing the plurality of IGBT modules onto the positioning assembly through a pressing mechanism to press and position the plurality of IGBT modules.

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