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Copper thin material ultrasonic spot welding connecting method

A connection method, ultrasonic technology, applied in the direction of welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of unfavorable mechanical properties of welded joints, decrease and increase of effective thickness of welded joints, etc., to promote mechanical interlocking phenomenon, effective Conducive to the conduction of electricity and the effect of increasing the bonding area

Inactive Publication Date: 2019-02-22
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while increasing the bonding area of ​​the welded interface, the effective thickness of the welded joint will be greatly reduced, which is not conducive to the improvement of the mechanical properties of the welded joint.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] When ultrasonic spot welding is performed on 0.7mm pure copper thin materials, a nano-copper particle with a thickness of 20 μm is added between the copper thin materials, and its particle size is 40 nm. The shape of the welding head used is square, and the welding time is The welding pressure is 0.9s, the welding pressure is 45psi, and the welding amplitude is 50μm. After the ultrasonic spot welding process is completed, the copper thin material ultrasonic spot welding joint of the technology of the present invention can be obtained, which can increase the bonding area of ​​the welding interface without sacrificing the welding joint. effective thickness.

[0018] The performance parameters of the ultrasonic spot welding joint: the T-peeling force is 236.7N, which is 29.4% higher than that of the ultrasonic spot welding joint without the interlayer of nano-copper particles.

Embodiment 2

[0020] When ultrasonic spot welding is performed on 0.8mm pure copper thin materials, a nano-copper particle with a thickness of 25 μm is added between the copper thin materials, and its particle size is 48 nm. The shape of the welding head used is square, and the welding time is 1.2s, the welding pressure is 50psi, the welding amplitude is 55μm, after the ultrasonic spot welding process is completed, the copper thin material ultrasonic spot welding joint of the technology of the present invention is obtained.

[0021] The performance parameters of the ultrasonic spot welding joint: the T-peeling force is 216.3N, which is 34.2% higher than that of the ultrasonic spot welding joint without the interlayer of nano-copper particles.

Embodiment 3

[0023] When ultrasonic spot welding is performed on 0.9mm pure copper thin materials, a nano-copper particle with a thickness of 15 μm is added between the copper thin materials, and its particle size is 30 nm. The shape of the welding head used is square, and the welding time is 1.5s, the welding pressure is 60psi, the welding amplitude is 60μm, after the ultrasonic spot welding process is completed, the copper thin material ultrasonic spot welding joint of the technology of the present invention is obtained.

[0024] The performance parameters of the ultrasonic spot welding joint: the T-peeling force is 208.7N, which is 31.8% higher than that of the ultrasonic spot welding joint without the interlayer of nano-copper particles.

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Abstract

The invention provides a copper thin material ultrasonic spot welding connecting method. When ultrasonic spot welding connection is carried out on copper thin materials, nano-copper particles with a thickness of 2-50 [Mu]m are added between copper thin materials; and when the nano-copper particles are added between the copper thin materials for ultrasonic spot welding connection, the welding timeis 0.2-1.6 s, the welding pressure is 20-70 psi and the welding amplitude is 20-65 [Mu]m. According to the copper thin material ultrasonic spot welding connecting method, the nano-copper particles areadopted as an interlayer to solve the problem in the ultrasonic spot welding connection process, in specific, in the previous research of copper thin material ultrasonic spot welding, the problem that the effective thickness of a welded joint is greatly reduced while increasing the bonded area of welding interfaces is solved; and with adoption of the copper thin material ultrasonic spot welding connecting method, the purpose of increasing the bonded area of ultrasonic spot welding interfaces without reducing the effective thickness of the welded joint is realized, so that the purpose of improving the mechanical property of the ultrasonic spot welded joint is realized.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to an ultrasonic spot welding connection method for thin copper materials. Background technique [0002] In recent years, with the continuous aggravation of world environmental pollution, climate warming and global energy crisis, environmental protection issues such as energy conservation, emission reduction and green development have attracted more and more attention. Pure electric vehicles have the advantages of no exhaust emissions, energy saving and environmental protection, and low cost of use, and have become an important direction for the development of the modern automobile industry. As the core component of pure electric vehicles, power lithium-ion battery packs determine the stability, power supply performance and safety of pure electric vehicles by their quality and capacity. According to the power and capacity requirements of pure electric vehicles for powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/10B23K20/22
CPCB23K20/10B23K20/22
Inventor 倪增磊
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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