A compression positioning tool for IGBT welding and a method of using the same

Abstract

The application belongs to the technical field of IGBT welding, and particularly relates to a pressing positioning tool for IGBT welding and a use 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 arranged on the positioning assembly and used for conveying the product assembly. 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. The pressing mechanism is provided with a hollow groove which is arranged opposite to a welding position of the IGBT module. The driving assembly is connected with the pressing mechanism. The driving assembly drives the movement of the pressing mechanism, and is used for pressing the plurality of IGBT modules on the positioning assembly to press and position the IGBT modules. The application can simultaneously press and position a plurality of IGBT modules, improves the welding efficiency, and can also realize the adjustable pressing of the product assembly, ensures the performance of the welded product, and improves the stability during welding.

Description

Technical Field

[0001] This invention belongs to the field of IGBT welding technology, specifically relating to a clamping and positioning fixture for IGBT welding and its usage method. Background Technology

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

[0003] IGBTs (Insulated Gate Bipolar Transistors) are core components of power electronic systems, possessing independent power conversion functions. With the continuous upgrading of strategic industries such as new energy, rail transportation, and smart grids, there are increasing demands for miniaturization, modularization, and high power density in IGBT modules. IGBT modules utilize ultrasonic welding to connect electrical power terminals to high-power semiconductor chip circuit structures, achieving atomic-level tight contact.

[0004] Before ultrasonically welding IGBT modules, the IGBT modules need to be clamped and positioned. The inventors found that existing clamping and positioning fixtures have at least the following technical problems:

[0005] On the one hand, existing tooling can only clamp and position a single IGBT module, and cannot clamp and position multiple IGBT modules simultaneously, which reduces welding efficiency and accuracy. On the other hand, insufficient clamping force of the tooling on the IGBT module can easily lead to incomplete or unreliable welding during welding, affecting the performance of the welded products.

[0006] Therefore, it is necessary to improve the existing technology to overcome its shortcomings in practical applications. Summary of the Invention

[0007] Based on the aforementioned shortcomings and deficiencies in the prior art, one of the objectives of this invention is to at least solve one or more of the aforementioned problems in the prior art. In other words, one of the objectives of this invention is to provide a clamping and positioning fixture for IGBT welding and its method of use that meets one or more of the aforementioned requirements.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0009] This invention provides a clamping and positioning fixture for IGBT welding, characterized in that it includes a base plate, a positioning component, a driving component, a conveying mechanism, a product component, and a clamping mechanism. The positioning component and the driving component are disposed on the base plate, the conveying mechanism is mounted on the positioning component, the conveying mechanism is used to convey the product component, and the clamping mechanism is disposed on the product component.

[0010] The product component includes a tray and several IGBT modules disposed on the tray. The clamping mechanism is provided with a hollow groove, which is directly opposite to the welding position of the IGBT module.

[0011] The drive component is connected to the clamping mechanism, and the drive component moves in conjunction with the clamping mechanism to press several IGBT modules against the positioning component to clamp and position the IGBT modules.

[0012] As a preferred embodiment, the drive assembly includes several cylinders evenly distributed on the base plate, the cylinders being connected to a fixing plate, and the fixing plate being connected to the clamping mechanism.

[0013] As a preferred embodiment, the clamping mechanism comprises several components, each including a pressure plate and a clamping assembly. The pressure 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 fixing block, a spring, a guide block, a first pressing block, and a second pressing block. The guide block is connected to the pressure plate, and a spring is installed inside the guide block. One end of the spring is connected to the fixing block, and the other end is connected to the first pressing block or the second pressing block. The first pressing block and the second pressing block respectively abut against the IGBT module.

[0015] As a preferred embodiment, the positioning component includes a base, a positioning seat, and a positioning slot. The base is provided with a plurality of positioning seats and positioning slots, and the positioning slots are arranged one-to-one with the IGBT modules. The base is provided with a first positioning pin, which is used to position the tray. The positioning seat is provided with a second positioning pin, which is used to position the IGBT modules.

[0016] As a preferred embodiment, the tray is provided with a clearance groove, and after the IGBT module comes into contact with the positioning groove, the tray detaches 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 conveyor belt is connected to the conveying arm, and the product assembly is placed on the conveyor belt. The motor is mounted on the conveying arm and is connected to the conveyor belt for transmission.

[0018] As a preferred embodiment, the guiding assembly includes a guide post and an elastic element, the conveying arm moves up and down along the guide post, and the elastic element abuts against the conveying arm to provide a restoring force to the conveying arm.

[0019] As a preferred embodiment, the base plate is provided with a blocking component, which abuts against the conveying mechanism to limit the movement position of the conveying mechanism.

[0020] The present invention also provides a method of using a clamping and positioning fixture for IGBT welding, which, when using the clamping and positioning fixture described in any of the above embodiments, includes the following steps:

[0021] S1. The product components are conveyed to the welding position via a conveying mechanism;

[0022] S2. Drive the pressing mechanism to move through the drive component, so as to press the product component downward against the conveying mechanism;

[0023] S3. The conveying mechanism continues to move downwards so that the linkage plate disengages from the IGBT module, allowing the IGBT module to be installed on the positioning assembly.

[0024] S4. Several IGBT modules are pressed against the positioning component by the pressing mechanism to press and position the several IGBT modules.

[0025] Compared with the prior art, the beneficial effects of this invention are:

[0026] This invention provides a clamping and positioning fixture for IGBT welding, which can not only simultaneously clamp and position multiple IGBT modules, improving welding efficiency and accuracy and avoiding incomplete or weak welds during welding; it can also achieve adjustable pressure on product components, preventing incomplete or weak welds during welding, ensuring the performance of welded products, and improving welding stability. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the clamping and positioning fixture according to an embodiment of the present invention;

[0029] Figure 2 This is an exploded view of the clamping and positioning fixture according to an embodiment of the present invention;

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

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

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

[0033] Figure 6 This is a schematic diagram of the structure of the product components according to an embodiment of the present invention;

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

[0035] In the diagram: 1. Base plate, 2. Positioning assembly, 21. Base platform, 211. First positioning pin, 22. Positioning seat, 221. Second positioning pin, 23. Positioning groove, 3. Drive assembly, 31. Cylinder, 32. Fixing plate, 4. Conveying mechanism, 41. Motor, 42. Conveying arm, 43. Pulley, 44. Conveying belt, 45. Guide assembly, 451. Guide post, 452. Elastic element, 5. Product assembly, 51. Support plate, 52. IGBT module, 6. Pressing mechanism, 61. Pressure plate, 611. Hollow groove, 62. Pressing assembly, 621. Fixing block, 622. Spring, 623. Guide block, 624. First pressing block, 625. Second pressing block, 7. Blocking assembly. Detailed Implementation

[0036] To more clearly illustrate the embodiments of this application, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0037] In the description of the embodiments of this application, the terms "upper," "lower," "front," "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," etc., are only used for distinction in description and have no special meaning.

[0038] According to some embodiments of this application, please refer to Figures 1 to 7As shown, a clamping and positioning fixture for IGBT welding is provided, including a base plate 1, a positioning component 2, a drive component 3, a conveying mechanism 4, a product component 5, and a clamping mechanism 6. The positioning component 2 and the drive component 3 are disposed on the base plate 1. The conveying mechanism 4 is installed on the positioning component 2 and is used to convey the product component 5. The clamping mechanism 6 is disposed on the product component 5. The product component 5 includes a support plate 51 and several IGBT modules 52 disposed on the support plate 51. The clamping mechanism 6 is provided with a hollow groove, which is directly opposite the welding position of the IGBT module 52. The drive component 3 is connected to the clamping mechanism 6 and moves in conjunction with the clamping mechanism 6 to clamp the several IGBT modules 52 onto the positioning component 2 to clamp and position the IGBT modules 52.

[0039] In some embodiments of this application, the drive assembly 3 includes several cylinders 31 evenly distributed on the base plate 1, the cylinders 31 are connected to the 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 component 2, with three cylinders on each side. The output ends of the cylinders on the same side are connected to the fixing plate 32. The pressing mechanism 6 is connected to the fixing plates 32 on both sides to ensure that the pressing mechanism 6 moves up and down.

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

[0042] In a specific embodiment, there are three clamping mechanisms 6. The two ends of the three clamping mechanisms 6 are respectively connected to two fixed plates 32, so that the three clamping mechanisms 6 move up and down synchronously and keep their heights level, so as to avoid inconsistent clamping force when clamping product components, which would affect the welding effect.

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

[0044] Furthermore, the upper end of the spring 622 is connected to a bolt, and the spring force can be adjusted by rotating the bolt, so that the force exerted when the first pressure block 624 and / or the second pressure block 625 presses down can be adjusted, thereby adjusting the clamping force on the IGBT module.

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

[0046] In some embodiments of this application, the positioning component 2 includes a base 21, a positioning seat 22, and a positioning groove 23. The base 21 is provided with a plurality of positioning seats 22 and positioning grooves 23, and the positioning grooves 23 are arranged one-to-one with the IGBT modules 52. The base 21 is provided with a first positioning pin 211, which is used to position the tray 51. The positioning seat 22 is provided with a second positioning pin 221, which is used to position the IGBT modules 52.

[0047] Furthermore, the tray 51 is provided with a clearance groove. After the IGBT module 52 comes into contact with the positioning groove 23, the tray 51 and the IGBT module 52 are separated.

[0048] In some embodiments of this 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 mounted on the conveying arm 42 and is connected to the conveyor belt 44 for transmission.

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

[0050] In some embodiments of this application, a blocking component 7 is provided on the base plate 1. The blocking component 7 abuts against the conveying mechanism 4 to limit the movement position of the conveying mechanism 4. By abutting against the end of the conveying mechanism 4, the conveying mechanism 4 is limited.

[0051] According to the embodiments of this application, a clamping and positioning fixture for IGBT welding can not only simultaneously clamp and position multiple IGBT modules, improving welding efficiency and accuracy and avoiding the occurrence of incomplete or weak welds during welding; it can also achieve adjustable pressure on product components, avoiding the occurrence of incomplete or weak welds during welding, ensuring the performance of welded products, and improving the stability during welding.

[0052] According to some embodiments of this application, a method for using a clamping and positioning fixture for IGBT welding is also provided, comprising the following steps:

[0053] S1. The product components are conveyed to the welding position by the conveying mechanism, and the conveying mechanism abuts against the blocking components;

[0054] S2. Drive the pressing mechanism to move by the drive component, so that the product component is pressed down against the conveying mechanism, so that the conveying mechanism moves down along the guide column;

[0055] S3. The conveying mechanism continues to move downwards to bring the IGBT module into contact with the positioning component, and to disengage the tray from the IGBT module so that the IGBT module can be installed on the positioning component.

[0056] S4. The drive component continues to press down, and the clamping mechanism presses several IGBT modules against the positioning component to clamp and position the several IGBT modules.

[0057] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X existing alone, X and Y existing simultaneously, and Y existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] The above description is only a detailed explanation of the preferred embodiments and principles of this application. For those skilled in the art, there may be changes in the specific implementation based on the ideas provided by this invention, and these changes should also be considered within the scope of protection of this application.

Claims

1. A clamping and positioning fixture for IGBT welding, characterized in that, It includes a base plate, a positioning component, a driving component, a conveying mechanism, a product component, and a pressing mechanism. The positioning component and the driving component are disposed on the base plate. The conveying mechanism is mounted on the positioning component and is used to convey the product component. The pressing mechanism is disposed on the product component. The product component includes a tray and several IGBT modules disposed on the tray. The clamping mechanism is provided with a hollow groove, which is directly opposite to the welding position of the IGBT module. The drive component is connected to the clamping mechanism, and the drive component moves in conjunction with the clamping mechanism to clamp the IGBT modules onto the positioning component. The clamping mechanism includes a pressure plate and a clamping assembly. The clamping assembly is nested in the hollow groove and abuts against the IGBT module. The clamping assembly includes a spring and a bolt. The upper end of the spring is connected to the bolt. The spring force is adjusted by rotating the bolt, thereby adjusting the clamping force on the IGBT module. The positioning component includes a base, a positioning seat, and a positioning groove. The base is provided with a first positioning pin, which is used to position the tray. The positioning seat is provided with a second positioning pin, which is used to position the IGBT module. The tray is provided with a clearance groove. After the IGBT module comes into contact with the positioning groove, the tray separates from the IGBT module.

2. The clamping and positioning fixture for IGBT welding according to claim 1, characterized in that, The drive assembly includes several cylinders evenly distributed on the base plate, the cylinders are connected to a fixing plate, and the fixing plate is connected to the clamping mechanism.

3. The clamping and positioning fixture for IGBT welding according to claim 2, characterized in that, The clamping mechanism comprises several parts, and each clamping mechanism has its two ends connected to a fixed plate to maintain synchronous up-and-down movement and be at the same height.

4. A clamping and positioning fixture for IGBT welding according to claim 3, characterized in that, The clamping assembly further includes a fixing block, a guide block, a first pressing block, and a second pressing block. The guide block is connected to the pressure plate, and a spring is installed inside the guide block. One end of the spring is connected to the fixing block, and the other end is connected to the first pressing block or the second pressing block. The first pressing block presses against the frame of the IGBT module, and the second pressing block presses against the substrate of the IGBT module.

5. A clamping and positioning fixture for IGBT welding according to claim 1, characterized in that, The base is provided with several positioning seats and positioning slots, and the positioning slots are arranged one-to-one with the IGBT modules.

6. A clamping and positioning fixture 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 conveyor belt is connected to the conveying arm, and the product assembly is placed on the conveyor belt. The motor is mounted on the conveying arm and is connected to the conveyor belt for transmission.

7. A clamping and positioning fixture for IGBT welding according to claim 6, characterized in that, The guiding assembly includes a guide post and an elastic element. The conveying arm moves up and down along the guide post, and the elastic element abuts against the conveying arm to provide a rebound force for the conveying arm.

8. A clamping and positioning fixture for IGBT welding according to claim 1, characterized in that, The base plate is provided with a blocking component, which abuts against the conveying mechanism to limit the movement position of the conveying mechanism.

9. A method of using a clamping and positioning fixture for IGBT welding, characterized in that, The clamping and positioning fixture as described in any one of claims 1 to 8 includes the following steps: S1. The product component is conveyed to the welding position by a conveying mechanism; the conveying mechanism abuts against the blocking component. S2. Drive the pressing mechanism to move through the drive component, so as to press the product component downward against the conveying mechanism; causing the conveying mechanism to move downward along the guide column; S3. The conveying mechanism continues to move downwards, so that the linkage tray is disengaged from the IGBT module. The tray is positioned by the first positioning pin and the IGBT module is positioned by the second positioning pin. At the same time, the tray is disengaged from the IGBT module so that the IGBT module is installed on the positioning component. S4. Adjust the spring force of the rotating bolt, and press several IGBT modules onto the positioning component through the clamping mechanism to clamp and position the several IGBT modules.

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