Laser welding method for copper-aluminum welding

A laser welding, copper-aluminum technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low welding efficiency and poor reliability of copper-aluminum connection structure

Inactive Publication Date: 2018-11-16
HANS LASER TECH IND GRP CO LTD
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  • Abstract
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Problems solved by technology

[0004] Based on this, it is necessary to provide a laser welding method for copper-aluminum welding to solve the problems of low

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  • Laser welding method for copper-aluminum welding
  • Laser welding method for copper-aluminum welding
  • Laser welding method for copper-aluminum welding

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Embodiment Construction

[0027] In order to facilitate the understanding of the present invention, the laser welding method for copper-aluminum welding will be described more fully below with reference to the relevant drawings. The preferred embodiment of the laser welding method for copper-aluminum welding is given in the accompanying drawings. However, the laser welding method for copper-aluminum welding can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the laser welding method for copper-aluminum welding more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements...

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Abstract

The invention relates to a laser welding method for copper-aluminum welding. The laser welding method for copper-aluminum welding is used for welding a copper part and an aluminum part and comprises the steps that the copper part and the aluminum part are positioned, and a weld seam is formed between the copper part and the aluminum part; the weld seam is welded through high-frequency modulation pulsed spot welding; and by controlling the duty ratio of pulsed spot welding, welding is conducted at the predetermined welding speed, and meanwhile protective gas is blown to the weld seam. Accordingto the laser welding method for copper-aluminum welding, the cooling speed of a molten pool is decreased through preheating of front welding spots to the weld seam and after-heating of rear welding spots to the front welding spots, then, through matching of a high-frequency light emitting mode, the molten pool is always in the environment that the welding seam is preheated by the front welding spots, and the front welding spots are subjected to after-heating by the rear welding spots, the welding quality of a copper-aluminum connecting structure formed by welding the copper part and the aluminum part is ensured, and cracks at the welded position of the copper part and the aluminum part are avoided.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser welding method for copper-aluminum welding. Background technique [0002] In the new energy battery industry, an efficient and reliable copper-aluminum connection technology has been sought. Due to the large difference in physical and chemical properties of copper and aluminum, the use of fusion welding copper and aluminum will produce brittle phases, resulting in the problem of embrittlement and cracks at the copper-aluminum joint, that is, the strength of the copper-aluminum connection structure obtained by fusion welding is extremely high. Low. [0003] In order to avoid the defects of copper-aluminum fusion welding connection, the traditional copper-aluminum connection gradually adopts solid-phase connection technology, such as ultrasonic welding and friction welding technology. However, the welding efficiency of the copper-aluminum connection structure obtaine...

Claims

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Application Information

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IPC IPC(8): B23K26/12B23K26/21B23K26/70
CPCB23K26/12B23K26/21B23K26/703
Inventor 郑国强胡勇刘昊徐作斌雷鹏飞王锐王培为高云峰
Owner HANS LASER TECH IND GRP CO LTD
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