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Plastic connection method of aluminum-copper structure

A connection method and plastic technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of reducing the connection performance, increasing the difficulty of implementing the solid-phase bonding connection process, easy oxidation of aluminum and copper, and achieving low equipment cost. , It is convenient for mass production, and the reliability is good.

Active Publication Date: 2017-05-24
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology mainly realizes the solid-phase bonding of aluminum and copper through hot extrusion. During the heating process, aluminum and copper are easily oxidized, and the oxide layer will reduce the connection performance; due to the low melting point of aluminum and copper, the heating temperature needs to be strictly controlled. However, in practice, for small-sized aluminum The heat dissipation of copper parts is particularly fast, which increases the difficulty of implementing the solid-phase bonding process

Method used

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  • Plastic connection method of aluminum-copper structure
  • Plastic connection method of aluminum-copper structure

Examples

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Embodiment 1

[0020] Such as figure 1 with figure 2 As shown, in this embodiment, the copper ring and aluminum parts are made of pure copper and pure aluminum, respectively. The center of the aluminum part is provided with a counterbore of Φ4×1mm to facilitate subsequent assembly. The diameter of the aluminum part is D=60mm and the thickness is 2.5mm. The surface area to be connected S = 1320mm 2 . The steps of this embodiment are as follows:

[0021] 1) Prepare the copper ring and aluminum parts. The annealed copper sheet is processed by punching and blanking to obtain a ring-shaped sheet. The outer and inner diameter of the copper ring is d1 = 30mm, and the thickness of the copper ring is h = 0.6mm. , The expected thinning rate is 58.3%, and d2 is calculated to be 40mm. After the aluminum material is processed and the aluminum part is obtained, the aging treatment is carried out to improve its strength and meet the actual use requirements, and at the same time, it is not easy to deform du...

Embodiment 2

[0028] Such as figure 1 with figure 2 As shown, in this embodiment, the copper ring and aluminum parts are made of pure copper and pure aluminum, respectively. A counterbore of Φ4×1mm is provided in the center of the aluminum part to facilitate subsequent assembly. The diameter of the aluminum part is D=70mm, and the thickness is 2.5mm. The surface area to be connected S = 1507mm 2 . The steps of this embodiment are as follows:

[0029] 1) Prepare the copper ring and aluminum parts. The annealed copper sheet is processed by punching and blanking to obtain a ring-shaped sheet. The outer diameter and inner diameter of the copper ring d1 = 35mm, and the thickness of the copper ring h = 0.6mm , The expected thinning rate is 58.3%, and d2 is calculated to be 45mm. After the aluminum material is processed and the aluminum part is obtained, the aging treatment is carried out to improve its strength and meet the actual use requirements. At the same time, it is not easy to deform durin...

Embodiment 3

[0036] Such as figure 1 with figure 2 As shown, in this embodiment, the copper ring and the aluminum part are made of pure copper and pure aluminum, respectively. A counterbore of Φ4×1mm is provided in the center of the aluminum part to facilitate subsequent assembly. The diameter of the aluminum part is D=60mm and the thickness is 2.5mm. The area of ​​the surface to be connected S=1357mm 2 . The steps of this embodiment are as follows:

[0037] 1) Prepare the copper ring and aluminum parts. The annealed copper sheet is processed by punching and blanking to obtain a ring-shaped sheet. The outer and inner diameter of the copper ring is d1 = 30mm, and the thickness of the copper ring is h = 0.6mm. , The expected thinning rate is 50%, and d2 is calculated to be 42mm. After the aluminum material is processed and the aluminum part is obtained, the aging treatment is carried out to improve its strength and meet the actual use requirements, and at the same time, it is not easy to def...

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Abstract

The invention discloses a plastic connecting method of an aluminum copper structure; after a copper ring in an annealing state and an aluminum piece with roughened surface in an ageing hardening state are cleaned, a flat mold pressure head is adopted to flatten the copper ring on the aluminum piece, so that the thinning ratio of the copper ring is controlled within 50-70%; and the flattened copper ring expands from inside to outside to deform to connect with the roughened surface of the aluminum piece, so that the plastic connection of the aluminum copper structure is realized. The plastic connecting method can quickly, efficiently, simply and reliably finish the connection of the copper aluminum structure with low cost by adopting a plastic connecting mode under the condition of not heating.

Description

Technical field [0001] The invention relates to a technology in the field of metal processing, in particular to a plastic connection method of aluminum-copper structures. Background technique [0002] Both aluminum and copper are metal materials with excellent electrical conductivity, and they are widely used in power, refrigeration, aerospace and other fields. However, the price of copper is high and resources are more scarce. When parts are under specific working conditions and performance requirements, the use of composite structures connected by aluminum and copper can not only reduce component costs, but also exert their respective performance advantages. [0003] The existing aluminum-copper connection methods mainly include welding and mechanical connection. Because aluminum and copper are dissimilar metals, it is difficult to use fusion welding. The current feasible technical solution is to use friction welding, explosive welding and other pressure welding connection metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/233B23K20/24
CPCB23K20/02B23K20/2333B23K20/24
Inventor 胡成亮曾凡赵震
Owner SHANGHAI JIAOTONG UNIV
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