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Low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials

An aluminum-based composite material, laser-induced technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of high energy consumption, low joint strength, etc., to improve the shock effect, promote joint strength, energy saving and environmental protection welding The effect of features

Inactive Publication Date: 2020-08-18
HENAN POLYTECHNIC UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of low joint strength, obvious defects such as pores, high energy consumption and welding limitations existing in the welding process of existing aluminum matrix composite materials, and provides a low-power laser-induced double-pulse TIG welding of aluminum matrix composite materials. method

Method used

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  • Low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials
  • Low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials
  • Low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials

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specific Embodiment approach 1

[0013] Specific Embodiment 1: In this embodiment, the low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials adopts low-power pulsed laser and double-pulse TIG arc as the composite heat source, sets the welding path, and applies the composite heat source to the aluminum substrate fixed by the welding fixture. On composite material sheets, it achieves good welding of materials.

specific Embodiment approach 2

[0014] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the low-power laser-induced double-pulse TIG welding method of aluminum-based composite materials is carried out according to the following steps:

[0015] 1. Cutting and grinding of aluminum matrix composite materials: Cut the size of aluminum matrix composite materials according to actual needs, and then use an angle grinder to grind each surface of aluminum matrix composite materials until bright colors appear, and obtain aluminum matrix composite material parts to be welded;

[0016] 2. Defilming of aluminum matrix composite materials: use sandpaper to grind the butt joint surface of the aluminum matrix composite material parts to be welded, and clean the polished aluminum matrix composite material parts with ultrasonic cleaning for 15-20 minutes, and then use alcohol to clean them for 10-20 minutes. After 15 minutes, use a hair dryer to dry the residual alcohol on the sur...

specific Embodiment approach 3

[0026] Specific Embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 3, when the two pieces of aluminum-based composite material parts to be welded after removing the film are placed on the welding fixture in a docking manner and fixed, the Ti flakes or Ti alloy flakes with a thickness of 0.1-1 mm are placed in the middle position. Others are the same as in the first or second embodiment.

[0027] This embodiment can realize in-situ enhanced welding of materials.

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Abstract

The invention discloses a low-power laser-induced double-pulse TIG welding method for aluminum-based composite materials. The invention relates to the field of welding of the aluminum-based compositematerials, in particular to a low-power laser-induced double-pulse TIG welding method for the aluminum matrix composite materials. The invention aims to solve the problems of low joint strength, obvious defects such as air holes, high energy consumption and welding limitation in the existing aluminum-based composite material welding process. Low-power pulse laser and double-pulse TIG arcs are adopted as composite heat sources, a welding path is set, and the composite heat sources act on an aluminum-based composite plate fixed by a welding clamp. The method is used for welding the aluminum-based composite materials, the vibration and stirring effects on a welding pool can be enhanced through pulse laser and the double-pulse TIG arcs, the exhaust of gas in the welding pool is promoted, the occurrence of defects such as air holes in joint weld joints can be greatly reduced or even avoided, and meanwhile, the effect of refining grains can be achieved.

Description

technical field [0001] This paper relates to the welding field of aluminum matrix composite materials, and specifically relates to a low-power laser-induced double-pulse TIG welding method for aluminum matrix composite materials. Background technique [0002] As a new material with excellent performance, aluminum matrix composite material has more excellent performance than ordinary metal materials, such as higher specific strength, specific stiffness, good stability, heat resistance, wear resistance and creep strength, etc. etc., which can meet the stringent requirements of modern scientific and technological production and development on material performance. For a long time, aluminum matrix composites have very broad application prospects in the fields of aerospace, cutting-edge weapons, electronic packaging, and automobile manufacturing. Moreover, my country is rich in aluminum resources, the sources of reinforcing phase particles are extensive, and the preparation cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/346B23P15/00
CPCB23K26/348B23K26/346B23P15/00
Inventor 巴现礼牛济泰高增邱得超张璐璐
Owner HENAN POLYTECHNIC UNIV
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