Laser hybrid welding technological method of high-strength magnesium alloy thick plate

A process method and composite welding technology, applied in the direction of laser welding equipment, welding equipment, welding equipment, etc., to achieve the effect of smooth and beautiful weld formation, improve the appearance quality of weld seam, and reduce the number of wire filler welding passes

Pending Publication Date: 2019-03-19
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a laser composite welding process for high-strength magnesium...

Method used

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  • Laser hybrid welding technological method of high-strength magnesium alloy thick plate
  • Laser hybrid welding technological method of high-strength magnesium alloy thick plate
  • Laser hybrid welding technological method of high-strength magnesium alloy thick plate

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Experimental program
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Effect test

Embodiment 1

[0024] The magnesium alloy thick plate 1 to be welded this time uses AZ31 magnesium alloy plate with a thickness of D=20mm, and the composite welding wire uses self-made high-quality φ1.6mm AZ31 coil wire. Such as figure 1 As shown, where the blunt edge height h=15mm, the groove blunt edge width d=1mm, and the groove angle α=30°.

[0025] Welding equipment: semiconductor laser with laser beam rotation function + robot welding arm welding equipment, in which the laser welding equipment is a new type of laser developed on the basis of semiconductor lasers and a specially developed rotating welding head. The high-speed servo motor drives the wedge-shaped shaping lens and cooperates with the motion control algorithm to realize the high-speed stirring movement of the spot. According to the actual process requirements, the radius of rotation, the speed of rotation, the angle of rotation and the shape of the rotation (such as C-type, X-type and 8-shaped type).

[0026] Soldering st...

Embodiment 2

[0038] Magnesium alloy thick plate 1 welded in this embodiment selects Mg-Y-Zn-Zr magnesium alloy plate with a thickness of D=50mm, the composite welding wire selects self-made high-quality φ1.6mm Mg-Y-Zn-Zr wire, and welds the groove Designed in the form of a double Y-groove with blunt edges, such as figure 1 As shown, where the blunt edge height h=40mm, the groove blunt edge width d=3mm, and the groove angle α=60°.

[0039] Welding equipment: semiconductor laser with laser beam rotation function + robot welding arm welding equipment, in which the laser welding equipment is a new type of laser developed on the basis of semiconductor lasers and a specially developed rotating welding head. The high-speed servo motor drives the wedge-shaped shaping lens and cooperates with the motion control algorithm to realize the high-speed stirring movement of the spot. According to the actual process requirements, the radius of rotation, the speed of rotation, the angle of rotation and the ...

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Abstract

The invention discloses a laser hybrid welding technological method of a high-strength magnesium alloy thick plate. The laser hybrid welding technological method comprises the following steps: 1, designing a welded joint: a groove of the welded joint adopts the double Y-shaped groove type with truncated edges; 2, preparing welding equipment: the welding equipment is composed of a semiconductor laser with the laser beam rotary function and a robot welding arm; 3, making preparation before welding; 4, carrying out truncated edge welding; and 5, groove welding. According to the laser hybrid welding technological method, the technology is simple, and through the welding method of truncated edge laser deep penetration welding and groove laser filler wire welding, the problem that the welding defects including a concave pit, an undercut and the like are likely to be formed on the surface of a welding seam is perfectly solved, the matching precision requirement of laser welding to the technological parameters including welding powder, welding speed, wire feed rate and wire feed angle and the like is lowered, the technological problem about fusion welding of a deformed high-strength magnesium alloy thick plate (20mm-50mm) is solved, excellent welding of the high-strength magnesium alloy thick plate is realized, the welding seam forming is level, smooth and artistic, the mechanical property of the welded joint meets the indicator requirement, the quality and property of the welded joint are greatly improved, and the laser hybrid welding technological method is suitable for weldingengineering structural components with various sizes.

Description

technical field [0001] The invention belongs to the technical field of welding of nonferrous metal materials, and relates to a welding process of a magnesium alloy thick plate, in particular to a laser composite welding process method of a high-strength magnesium alloy thick plate. Background technique [0002] Welding is an important method in metal material processing technology. At present, the research on magnesium alloy forming is mainly concentrated on die casting. If you want to process magnesium alloy parts with larger size and more complex structure, you can only use welding forming. Due to the large crystallization temperature range, low melting point, high chemical activity, high thermal conductivity and linear expansion coefficient of magnesium alloys, welding defects such as pores, thermal cracks, inclusions, and coarse grains are prone to occur during the welding process. The welding of magnesium alloys has become a technical problem restricting the application...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/08B23K26/70B23K33/00B23K37/02B23K103/08
CPCB23K26/0823B23K26/21B23K26/70B23K33/00B23K37/0252
Inventor 王生周古昕毛华杜秀征郎玉婧乔立李金宝蔡虹黄文涛
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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