Unilateral clamping mechanism and clamping device for IGBT (Insulated Gate Bipolar Translator) ultrasonic welding
By designing a single-sided clamping mechanism for IGBT modules, the fixing strength of the side wall of the IGBT module is improved by using the cooperation of the core rod and the elastic parts, the problem of insufficient fixation of the side wall in ultrasonic welding is solved, and the welding quality and good products are improved Rate.
Patent Information
- Application Number
- CN202323548186.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-26
AI Technical Summary
During the ultrasonic welding of IGBT modules, only the bottom of the module is insufficient, resulting in low fixing strength of the side wall, which is prone to problems such as unreliable welding, false welding or side wall cracks, affecting the welding quality and product yield.
A single-sided clamping mechanism is designed, including a fixing block, a core rod, a compacting block and an elastic member. The wedge-shaped movement of the compacting block is driven by the left and right movement of the core rod, against the side wall of the IGBT module, and reset through the elastic member. Improve the fixing strength of the side wall.
It effectively improves the fixing strength of the side wall of the IGBT module, avoids the phenomenon of unreliable welding and dummy welding, and improves the quality of ultrasonic welding and product yield.
Smart Images
Figure CN222327111U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of IGBT welding, and in particular relates to a single-side clamping mechanism and a clamping device for IGBT ultrasonic welding. 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 system, with independent power conversion function. IGBT module uses electrical power terminal and high-power semiconductor chip circuit structure to connect by ultrasonic welding, which can achieve close contact at atomic level.
[0004] When ultrasonically welding an IGBT module, currently only the bottom of the IGBT module can be fixed. The inventors have found that there are at least the following technical problems in practical applications: if only the bottom of the IGBT module is fixed, the fixing strength of the side wall of the IGBT module is insufficient. When the ultrasonic welding head presses down to weld the terminals in the IGBT module, it is easy to cause the terminals in the IGBT module to be unreliable or to have cold welds, thereby affecting the quality of ultrasonic welding. There is even a situation where the IGBT module is squeezed outward by the terminals, causing cracks in the side wall of the IGBT module, resulting in the scrapping of the welded product.
[0005] Based on this, it is necessary to improve the defects of the prior art to overcome the shortcomings in practical applications. Utility Model Content
[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes 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 purposes of the present invention is to provide a single-sided clamping mechanism and clamping device for IGBT ultrasonic welding that meets one or more of the above-mentioned needs.
[0007] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:
[0008] The utility model provides a single-sided clamping mechanism for IGBT ultrasonic welding, comprising a fixed block, a core rod, a clamping block and an elastic member, wherein the core rod is inserted into the fixed block, the clamping block is wedge-matched with the core rod, and the core rod and the clamping block are respectively connected to the elastic member; by applying force to the core rod, the core rod is linked to the clamping block for wedge-shaped movement, so that the side surface of the clamping block protrudes from the side surface of the fixed block and abuts against the side wall of the IGBT module, and the core rod and the clamping block are reset by the elastic member.
[0009] As a preferred solution, the elastic member includes a spring and a tension spring, the spring is installed inside the fixing block and connected to the core rod, and the tension spring connects the core rod and the pressing block.
[0010] As a preferred solution, the fixing block is provided with a cavity, the spring is installed in the cavity, and one end of the core rod is in contact with and cooperates with the spring.
[0011] As a preferred solution, the end of the core rod has a mounting groove, and the mounting groove is buckled with the spring.
[0012] As a preferred solution, avoidance holes are correspondingly provided on the core rod and the pressing block, and the tension spring is arranged through the avoidance holes.
[0013] As a preferred solution, a cotter pin is installed on the pressing block, and the cotter pin is connected to one end of the tension spring.
[0014] As a preferred solution, the core rod and the pressing block are respectively provided with wedge surfaces.
[0015] As a preferred solution, the fixing block is connected to a limiting block, and the limiting block contacts and cooperates with the pressing block so that the pressing block moves in the same direction.
[0016] As a preferred solution, the limiting block and the fixing block are fixedly connected via a pin.
[0017] The utility model provides a clamping device for IGBT ultrasonic welding, comprising a single-sided clamping mechanism as described in any of the above schemes, wherein the single-sided clamping mechanism abuts against a side wall of the IGBT module to fix the IGBT module.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model provides a single-side clamping mechanism for IGBT ultrasonic welding, which moves a core rod in the left-right direction and links a clamping block to move in the front-back direction, so that the clamping block abuts against the side wall of the IGBT module. When the ultrasonic welding head presses down to weld the terminal in the IGBT module, the fixing strength of the side wall of the IGBT module is improved, and the phenomenon that the IGBT module is squeezed outward by the terminal so that cracks appear on the side wall of the IGBT module, the terminal welding in the IGBT module is not firm or cold welding occurs, etc. is avoided, thereby improving the ultrasonic welding quality and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, 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 utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is an exploded view of a single-side clamping mechanism for IGBT ultrasonic welding according to an embodiment of the utility model;
[0022] Figure 2 It is a cross-sectional view of a single-side clamping mechanism for IGBT ultrasonic welding according to an embodiment of the utility model;
[0023] Figure 3 It is a structural schematic diagram of a core rod of an embodiment of the utility model;
[0024] Figure 4 This is a schematic diagram of the structure of a compression block according to an embodiment of the utility model;
[0025] Figure 5 This is a schematic diagram of the working state of the single-side clamping mechanism of the embodiment of the utility model;
[0026] In the figure: 1. fixing block; 11. limiting block; 12. mounting hole; 2. core rod; 21. mounting groove; 3. clamping block; 41; spring; 42. tension spring; 5. avoidance hole; 6. cotter pin; 7. IGBT module. DETAILED DESCRIPTION
[0027] In order to more clearly illustrate the embodiments of the utility model, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0028] In the description of the embodiments of the present invention, terms such as "upper", "lower", "front", and "rear" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0029] like Figures 1 to 4As shown, this embodiment provides a single-sided clamping mechanism for IGBT ultrasonic welding, including a fixed block 1, a core rod 2, a clamping block 3 and an elastic member, the core rod 2 is inserted into the fixed block 1, the clamping block 3 is wedge-matched with the core rod 2, and the core rod 2 and the clamping block 3 are respectively connected to the elastic member; by applying force to the core rod 2, the core rod 2 is linked with the clamping block 3 to move in a wedge shape, so that the side of the clamping block 3 protrudes from the side of the fixed block 1 and abuts against the side wall of the IGBT module, and the core rod 2 and the clamping block 3 are reset by the elastic member.
[0030] Specifically, the elastic member includes a spring 41 and a tension spring 42. The spring 41 is installed inside the fixed block 1 and connected to the core rod 2. The tension spring 41 connects the core rod 2 and the clamping block 3. The clamping block 3 is arranged on a side wall of the fixed block 1 and cooperates with the core rod 2 through a wedge shape to convert the left-right movement of the core rod 2 into the front-back movement of the clamping block 3. It should be noted that the axial direction along the core rod is the left-right direction, and the direction perpendicular to the axial direction of the core rod is the front-back direction.
[0031] Furthermore, the fixing block 1 is provided with a cavity, in which a spring 41 is installed, and one end of the core rod 2 is in contact with and cooperates with the spring 41 .
[0032] In order to ensure that the core rod 2 can reciprocate, a mounting groove 21 is provided at the end of the core rod 2. The mounting groove 21 is buckled with the spring 41. The core rod 2 can be reset through the spring 41, ensuring that the clamping mechanism can be reused to clamp and fix different IGBT modules.
[0033] Furthermore, avoidance holes 5 are correspondingly provided on the core rod 2 and the pressing block 3 , and the tension spring 42 is arranged through the avoidance hole 5 . When the core rod 2 moves, the tension spring 42 can prevent the pressing block 3 from being separated from the core rod 2 .
[0034] Furthermore, cotter pins 6 are respectively installed on the clamping block 3 and the fixed block 1, and the cotter pins 6 are connected to both ends of the tension spring 42. The fixed block 1 is provided with a mounting hole 12. One end of the tension spring 42 passes through the mounting hole 12 and is fixedly connected to the fixed block 1 through the cotter pin 6. The other end of the tension spring 42 is fixed to the clamping block 3 through the cotter pin 6, which can ensure that the clamping block and the fixed block maintain a tight fit.
[0035] Furthermore, wedge-shaped surfaces are respectively provided on the core rod 2 and the pressing block 3 , and the pressing block 3 and the core rod 2 are slidably matched through the wedge-shaped surfaces, so that the left-right movement of the core rod 2 can be converted into the front-back movement of the pressing block 3 .
[0036] Furthermore, the fixed block 1 is connected to the limit block 11, and the limit block 11 contacts and cooperates with the pressing block 3, so that the pressing block 3 moves in the same direction. The limit block 11 is fixedly connected to the fixed block 1 by a pin, and the side wall of the limit block 11 fits with the pressing block 3, so that the pressing block 3 moves in a direction perpendicular to the core rod 2.
[0037] This embodiment also provides a clamping device for IGBT ultrasonic welding, including the single-sided clamping mechanism as described above, such as Figure 5 As shown, the one-sided clamping mechanism abuts against the side wall of the IGBT module 7 to fix the IGBT module 7. The one-sided clamping mechanism can be used to fix the side wall of the IGBT module, and when ultrasonic welding the terminals in the IGBT module, cracks on the side wall due to extrusion are avoided, thereby avoiding problems such as cold welding or loose welding of the terminals.
[0038] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.
Claims
1. A single-side clamping mechanism for IGBT ultrasonic welding, characterized in that: It includes a fixed block, a core rod, a clamping block and an elastic member, wherein the core rod is inserted into the fixed block, the clamping block is wedge-matched with the core rod, and the core rod and the clamping block are respectively connected to the elastic member; by applying force to the core rod, the core rod links the clamping block to move in a wedge shape, so that the side surface of the clamping block protrudes from the side surface of the fixed block and abuts against the side wall of the IGBT module, and the core rod and the clamping block are reset by the elastic member.
2. A single-side clamping mechanism for IGBT ultrasonic welding according to claim 1, characterized in that: The elastic member comprises a spring and a tension spring. The spring is installed inside the fixing block and connected to the core rod. The tension spring connects the core rod and the pressing block.
3. A single-side clamping mechanism for IGBT ultrasonic welding according to claim 2, characterized in that: The fixing block is provided with a cavity, the spring is installed in the cavity, and one end of the core rod is in contact with and matched with the spring.
4. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 3, characterized in that: The end of the core rod is provided with a mounting groove, and the mounting groove is buckled with the spring.
5. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 2, characterized in that: The core rod and the pressing block are provided with avoidance holes correspondingly, and the tension spring is arranged through the avoidance holes.
6. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 2, characterized in that: A split pin is installed on the pressing block, and the split pin is connected to one end of the tension spring.
7. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 1, characterized in that: The core rod and the pressing block are respectively provided with wedge surfaces.
8. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 1, characterized in that: The fixing block is connected to the limiting block, and the limiting block contacts and cooperates with the pressing block so that the pressing block moves in the same direction.
9. The one-side clamping mechanism for IGBT ultrasonic welding according to claim 8, characterized in that: The limiting block is fixedly connected to the fixing block via a pin.
10. A clamping device for IGBT ultrasonic welding, characterized in that: It comprises the one-sided clamping mechanism as claimed in any one of claims 1 to 9, wherein the one-sided clamping mechanism abuts against the side wall of the IGBT module to fix the IGBT module.