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Process method for welding aluminum and aluminum alloy material by laser

An aluminum alloy material, laser welding technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., to reduce the cooling rate, reduce the generation of pores and welding cracks, and increase the size of the keyhole

Inactive Publication Date: 2010-10-06
武汉楚天激光(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0018] The purpose of the present invention is to provide a process method for laser welding aluminum and aluminum alloy materials, thereby solving the adaptability of laser welding to assembly accuracy, improving the stability of the welding process, and improving the quality of the weld seam

Method used

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Examples

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Embodiment Construction

[0035] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] A kind of process method of laser welding aluminum and aluminum alloy material of the present invention, concrete implementation is as follows:

[0037] In order to obtain the best welding quality, the choice of processing technology and the choice of laser are extremely important. Mechanistically, with sufficiently high power density and good beam quality, CO 2 Both lasers and Nd:YAG lasers can be used for welding aluminum alloys. However, due to differences in different materials, and the CO 2 Lasers and Nd:YAG lasers have their own characteristics. In order to obtain better aluminum alloy welding quality, starting from the selection of lasers, the selection is as follows:

[0038] 1) Using more than CO 2 Nd:YAG lasers with shorter wavelengths.

[0039] 2) Use lasers with high energy density and high beam quality.

[004...

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Abstract

The invention relates to laser welding and discloses a process method for welding aluminum and aluminum alloy material by laser. The process method comprises steps of: (1) selecting an Nd:YAG laser with high beam quality and high energy density; (2) adopting double-beam laser to weld aluminum and aluminum alloy material, wherein the distance between the two beams is 0.6-1.0 mm, and the energy ratio of the two beams is larger than 1:1; (3) surface treatment of a material to be welded: removing greasy dirt and dust with an organic solvent and removing an oxidation film by mechanical cleaning and / or chemical cleaning; and (4) utilizing the two-beam laser to weld the aluminum and the aluminum alloy material. A needle body, a sleeve and a lead of the invention are manufactured into a whole; therefore, the invention solves adaptability of the laser welding to assembly precision, enhances the stability of welding process and improves welding line quality.

Description

technical field [0001] The present invention relates to a kind of laser welding. It specifically relates to a process method for laser welding aluminum and aluminum alloy materials. Background technique [0002] The so-called weldability refers to the adaptability of metal materials to welding processing. It mainly refers to the difficulty of obtaining high-quality welded joints under certain welding process conditions. Due to the unique physical and chemical properties of aluminum and aluminum alloys, there are a series of difficulties in their welding. Therefore, it is necessary to understand its welding characteristics and possible problems in order to adopt appropriate welding methods and corresponding technological measures to ensure excellent welding quality. [0003] 1. Very easily oxidized [0004] The chemical combination of aluminum and oxygen is very strong, and the surface can be oxidized at room temperature. In addition, some alloy elements contained in alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/32B23K26/42C23G5/032C23G5/028C23G5/02B24B27/033C23G1/22C23G1/14C23F3/03B23K26/14B23K103/10B23K26/323B23K26/60
Inventor 彭红涛杨义龙孙文
Owner 武汉楚天激光(集团)股份有限公司
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