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CN-122008120-A - Special-shaped spring plate assembly tool and assembly method

CN122008120ACN 122008120 ACN122008120 ACN 122008120ACN-122008120-A

Abstract

The invention relates to the technical field of mechanical assembly tools and discloses a special-shaped elastic sheet assembly tool and an assembly method. The tool comprises a lower die holder, an elastic piece pressing device, a limiting part, a second guide structure and a driver, wherein the lower die holder is used for being fixed on a base plate, a device positioning cavity used for positioning a power device and a first guide structure are formed in the lower die holder, the elastic piece pressing device is detachably arranged above the lower die holder, a precompressed cavity matched with the U-shaped elastic piece in shape in a precompressed state is formed in the elastic piece pressing device, the precompressed cavity is provided with the limiting part in the vertical direction, the bottom of the elastic piece pressing device is provided with the second guide structure matched with the first guide structure, and the driver is arranged above the elastic piece pressing device and used for applying a downward driving force to the U-shaped elastic piece accommodated in the precompressed cavity so that the U-shaped elastic piece is separated from the constraint of the limiting part and is pushed out of the precompressed cavity. The spring plate assembling precision, controllability and high efficiency are realized, the assembling consistency and the product reliability are improved, and the large-scale production requirement of new energy sources is met.

Inventors

  • FAN JIALUN
  • ZHAO ZENGXI
  • CAO YANG
  • CHENG YONG

Assignees

  • 合肥巨一动力系统有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (10)

  1. 1. The utility model provides a dysmorphism shell fragment assembly fixture for assemble U type shell fragment (4) to the power device top on the base plate and compress tightly it, its characterized in that, dysmorphism shell fragment assembly fixture includes: the lower die holder (3) is used for being fixed to the substrate, and the lower die holder (1) is provided with a device positioning cavity for positioning the power device and a first guide structure; the elastic sheet pressing device comprises an elastic sheet pressing device (2), wherein the elastic sheet pressing device (2) is detachably arranged above a lower die holder (3) and is internally provided with a precompression cavity matched with the U-shaped elastic sheet (4) in shape in a precompression state, and the precompression cavity is provided with a limit part in the vertical direction; The driver (1) is arranged above the spring plate pressing device (2) and is used for applying a downward driving force to the U-shaped spring plate (4) accommodated in the precompression cavity, so that the U-shaped spring plate (4) is separated from the constraint of the limiting part and pushed out of the precompression cavity.
  2. 2. The profiled spring assembly fixture of claim 1, wherein the first guide structure is a guide post and the second guide structure is a guide sleeve, the guide post and the guide sleeve being in clearance fit.
  3. 3. The special-shaped elastic sheet assembly fixture according to claim 1, wherein the lower die holder (3) is further provided with a substrate positioning pin for positioning the substrate.
  4. 4. The special-shaped spring plate assembly fixture according to claim 1, wherein the cross section shape of the precompression cavity and the precompression state outline of the U-shaped spring plate (4) are of asymmetric design.
  5. 5. The profiled spring assembly fixture according to claim 1, characterized in that the bottom shape of the driver (1) is arranged to match the top of the U-shaped spring (4).
  6. 6. The profiled spring assembly fixture according to claim 5, wherein the actuating end of the driver (1) is an elastic pressure head.
  7. 7. The profiled spring assembly fixture according to claim 5 or 6, wherein the driver (1) is a manual lever mechanism, a pneumatic cylinder or a hydraulic cylinder drive.
  8. 8. The special-shaped spring plate assembly fixture according to claim 1, wherein a guide inclined plane is arranged at the inlet of the precompression cavity of the spring plate press holder (2).
  9. 9. A method for assembling a profiled spring sheet using a tooling according to any one of claims 1-8, the method comprising: S1, precompression, namely pressing the U-shaped elastic sheet (4) in a free open state into a precompression cavity of the elastic sheet pressing device (2) to enable the U-shaped elastic sheet to deform and stably keep in a precompression state; S2, butt-joint positioning, namely positioning and fixing a substrate fixed with a power device and the lower die holder (3), and mounting the pre-compressed elastic sheet pressing device (2) of the U-shaped elastic sheet (4) above the lower die holder (3) through a guide structure; S3, releasing and compacting the elastic sheets, namely starting the driver (1) to drive the U-shaped elastic sheets (4) in the precompression cavity to move downwards so as to separate from the limiting part and completely separate from the precompression cavity, and recovering deformation of the U-shaped elastic sheets (4) after the U-shaped elastic sheets are separated from constraint, wherein the restoring force acts on the power device to compact the power device on the substrate.
  10. 10. The method of assembling a shaped dome according to claim 1, further comprising: S4, resetting the tool, namely sequentially withdrawing the driver (1), and removing the elastic sheet pressing device (2) and the lower die holder (3).

Description

Special-shaped spring plate assembly tool and assembly method Technical Field The invention relates to the technical field of mechanical assembly tools, in particular to a special-shaped elastic sheet assembly tool and an assembly method. Background With the transition of global energy structures to clean and low-carbon, new energy industries such as new energy automobiles, photovoltaic power generation, energy storage systems and the like are exploded. As "hearts" for these systems, there is an increasing demand for high performance, high reliability power sources (e.g., on-board OBC/DC-DC, energy storage converters, photovoltaic inverters). These power supply products generally move toward higher power densities, higher efficiencies, and smaller volumes, which present unprecedented challenges to internal heat dissipation designs and mechanical assembly processes. In new energy sources (such as vehicle-mounted power sources and energy storage converters), heat dissipation of high-power devices (MOSFET and IGBT) is important. The U-shaped elastic sheet is used as a high-efficiency, low-cost and screw-free heat conduction interface fixing piece, and the power device is tightly pressed on the heat dissipation substrate through elastic restoring force of the U-shaped elastic sheet, so that the U-shaped elastic sheet has the advantages of screw-free, compensation tolerance, stable contact pressure and the like. However, the U-shaped spring is open in the free state and elastic, which results in a significant pain point in its manual assembly: 1. the positioning is difficult, the elastic sheet is easy to incline and deviate, and is difficult to put into a narrow mounting groove; 2. The assembly is uncontrollable, the manual compression force is difficult to control, and the elastic sheet is easy to deform plastically to fail or damage the power device; 3. Poor consistency, relying on hand feeling of workers, large fluctuation of assembly quality and hidden quality risk; 4. The efficiency is low, the potential safety hazard is that the manual operation is slow, and the bottle neck of the production line is formed. At the same time, sharp metal shrapnel also present the risk of scratching the operator. In the prior art, the closest scheme is to use a jig with a simple positioning clamping groove to be matched with manual press fitting. Although the scheme can provide preliminary positioning, the gesture of the elastic sheet in the compression and pushing processes can not be controlled, the inherent defects of incomplete positioning, uncontrollable process, no error prevention mechanism and the like still exist, and the requirements of the new energy industry on high reliability and large-scale production can not be met. Disclosure of Invention The invention aims to solve the problems of poor positioning precision, uncontrollable process, weak error-proofing capability, low efficiency and high quality risk of the U-shaped spring plate assembly in the prior art, and provides a special-shaped spring plate assembly tool and an assembly method, which realize the accurate, controllable and efficient spring plate assembly, improve the assembly consistency and the product reliability and adapt to the large-scale production requirement of new energy sources. In order to achieve the above object, an aspect of the present invention provides a special-shaped spring assembly fixture for assembling and compacting a U-shaped spring above a power device on a substrate, the special-shaped spring assembly fixture comprising: the lower die holder is used for being fixed to the substrate, and a device positioning cavity for positioning the power device and a first guide structure are arranged on the lower die holder; The elastic sheet pressing device is detachably arranged above the lower die holder, and is internally provided with a precompression cavity matched with the U-shaped elastic sheet in shape in a precompression state, wherein the precompression cavity is provided with a limiting part in the vertical direction; The driver is arranged above the spring plate pressing device and is used for applying a downward driving force to the U-shaped spring plate accommodated in the precompression cavity so that the U-shaped spring plate is separated from the constraint of the limiting part and pushed out of the precompression cavity. Preferably, the first guiding structure is a guiding column, the second guiding structure is a guiding sleeve, and the guiding column and the guiding sleeve are in clearance fit. Preferably, the lower die holder is further provided with a substrate positioning pin for positioning the substrate. Preferably, the cross section shape of the precompression cavity and the precompression state outline of the U-shaped shrapnel are of asymmetric design. Preferably, the bottom of the driver is shaped to match the top of the U-shaped spring. Preferably, the actuating end of the driver is an elastic pressure head. Pr