Plastic connecting 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 easy oxidation of aluminum and copper, increase the difficulty of implementing the solid-phase bonding process, reduce the connection performance, etc., and achieve low equipment cost. , convenient for mass production, good reliability

Active Publication Date: 2015-10-21
SHANGHAI JIAO TONG UNIV
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  • 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 connecting method of aluminum copper structure
  • Plastic connecting method of aluminum copper structure

Examples

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Effect test

Embodiment 1

[0020] Such as figure 1 and figure 2 As shown, in this embodiment, the materials of the copper ring and the aluminum part are pure copper and pure aluminum respectively, and a Φ4×1mm counterbore 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. Surface area to be connected S = 1320mm 2 . The steps of this embodiment are as follows:

[0021] 1) Prepare the copper ring and the aluminum parts. The ring-shaped sheet obtained by processing the annealed copper sheet through the punching and blanking process, the outer diameter and inner diameter of the copper ring d1 = 30mm, and the thickness of the copper ring h = 0.6mm , the expected thinning rate is 58.3%, and d2 is calculated as 40mm. After the aluminum material is processed and the aluminum parts are obtained, aging treatment is carried out to improve its strength to meet the actual use requirements, and at the same tim...

Embodiment 2

[0028] Such as figure 1 and figure 2 As shown, in this embodiment, the materials of the copper ring and the aluminum part are pure copper and pure aluminum respectively, and a Φ4×1mm counterbore 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. Surface area to be connected S = 1507mm 2 . The steps of this embodiment are as follows:

[0029] 1) Prepare the copper ring and the aluminum piece, and process the ring-shaped sheet obtained by punching and blanking the copper sheet in the annealed state. The outer diameter and inner diameter of the copper ring are d1=35mm, and the thickness of the copper ring is h=0.6mm , the expected thinning rate is 58.3%, and d2 is calculated as 45mm. After the aluminum material is processed and the aluminum parts are obtained, aging treatment is carried out to improve its strength to meet the actual use requirements, and at the same time, ...

Embodiment 3

[0036] Such as figure 1 and figure 2 As shown, in this embodiment, the materials of the copper ring and the aluminum part are pure copper and pure aluminum respectively, and a Φ4×1mm counterbore 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. Surface area to be connected S = 1357mm 2 . The steps of this embodiment are as follows:

[0037] 1) Prepare the copper ring and the aluminum parts. The ring-shaped sheet obtained by processing the annealed copper sheet through the punching and blanking process, the outer diameter and inner diameter of the copper ring d1 = 30mm, and the thickness of the copper ring h = 0.6mm , It is estimated that the thinning rate is 50%, and d2 is calculated as 42mm. After the aluminum material is processed and the aluminum parts are obtained, aging treatment is carried out to improve its strength to meet the actual use requirements, and at th...

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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 treatment, in particular to a plastic connection method for an aluminum-copper structure. Background technique [0002] Both aluminum and copper are metallic materials with excellent electrical conductivity, and are widely used in fields such as electric power, refrigeration, and aerospace. However, the price of copper is high and resources are scarcer. When the components are under specific working conditions and performance requirements, the composite structure with aluminum-copper connection can not only reduce the cost of components, but also give full play to their respective performance advantages. [0003] The existing aluminum-copper connection methods mainly include welding and mechanical connection. Since aluminum and copper are dissimilar metals, it is difficult to adopt welding methods. At present, the feasible technical solutions are pressure welding connection methods such as fr...

Claims

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Application Information

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