Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method

A welding method and arc heating technology, which is applied in the field of arc welding and welding, and can solve the problems that aluminum alloy and magnesium alloy are prone to produce pores and cracks, and the back of the joint is poorly formed.

Inactive Publication Date: 2008-09-17
HARBIN INST OF TECH
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Problems solved by technology

[0006] The present invention is to solve the problem that air holes and cracks are easily produced in the welding

Method used

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  • Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method
  • Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method
  • Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method

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Embodiment Construction

[0012] The welding method for preheating aluminum alloy and magnesium alloy with additional electric arc heating copper backing plate of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] In the method, a copper backing plate is used when welding aluminum alloy and magnesium alloy butt welds, and an electric arc is used to heat the back of the backing plate. The shape of the copper backing plate varies according to the weldment. When welding thin plates, flat copper backing plates can be used directly, such as image 3 ; When welding thicker plates, the shape of the copper backing plate adopts two forms: one is to use the rolling method to roll the thinner copper backing plate into Figure 4 The shape shown; the other is to use the method of machining to open a notch on the thicker copper backing plate, the shape is as follows Figure 5 shown. The welding method is TIG, MIG, plasma arc welding or laser welding. The...

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Abstract

The invention relates to a welding method, in particular to a welding method in which an electric arc is added to heat a copper padding plate and preheat aluminum alloy and magnesium alloy, aiming to reduce defects of blowholes and cracks at the joint, ensure good forming at the back of the joint, and finally obtain high quality joint which is suitable for aluminum alloy and magnesium alloy. In order to solve the problems that the aluminum alloy and magnesium alloy are liable to generate blowholes and cracks during welding and the forming at the back of the joint is poor, the invention provides the welding method in which the electric arc is added to heat the copper padding plate and preheat aluminum alloy and magnesium alloy. The copper padding plate is adopted when the butt joint is welded using aluminum alloy and magnesium alloy, and the electric arc is added at the back of the copper padding plate. The shape of the copper padding plate varies with the weldment. The method has the advantages of simple and easy practice, convenient operation, and obvious effect for improving the forming at the back of the joint and the quality of the joint.

Description

technical field [0001] The invention relates to a welding method, specifically a welding method for preheating an aluminum alloy and a magnesium alloy by heating a copper backing plate with an additional electric arc, and belongs to the field of electric arc welding. Background technique [0002] Aluminum and aluminum alloys are widely used in industry due to their high specific strength and good corrosion resistance. The specific gravity of magnesium is 2 / 3 of that of aluminum. It is a metal with good specific strength. In industry, aluminum, zinc and other components are often added to magnesium alloy to improve its performance. In recent years, with the rapid development of science and technology and industrial economy, especially the vigorous development of the aerospace industry and the automotive industry, the demand for high-quality aluminum alloy and magnesium alloy welded components is increasing. The welding of aluminum alloy and magnesium alloy mainly exists Two ...

Claims

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Application Information

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IPC IPC(8): B23K9/035B23K9/235B23K9/23B23K103/08
Inventor 吕世雄王武义宋建岭董红刚王帅许全光
Owner HARBIN INST OF TECH
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