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Laser-electric arc composite processing method

A composite processing and arc technology, applied in arc welding equipment, laser welding equipment, metal processing equipment, etc., can solve problems such as insufficient thermal electron emission, light beam absorption, scattering, etc., achieve large industrial application potential and development prospects, and ensure full Utilize and increase the effect of penetration

Inactive Publication Date: 2007-04-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the shortcomings of the existing laser-arc composite heat source processing method, the present invention proposes a new type of laser-arc composite heat source material processing method, which solves the problem that the existing laser-arc composite heat source processing technology is insufficient due to local thermal electron emission of the arc And a series of problems caused by arc plasma absorption of laser energy and beam scattering

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Embodiment Construction

[0010] This embodiment adopts a paraxial laser-arc compound heat source device, refer to the relative position shown in FIG. 2 . The angle α between the laser beam 1 and the arc electrode 2 is 45°; the distance between the impact point of the laser beam 1 and the center of the welding pool of the arc electrode 2 is D LA is 2mm; the distance h from the tip of the electrode 2 in the protective gas cover 3 to the workpiece is 2mm. Then determine the laser power, arc power, and shielding gas flow according to the material to be processed and the thickness of the plate. In the hybrid welding process, the laser is in the pulse output mode, and the arc is in the AC mode. Set the trigger pulse signal, according to the needs of welding, cutting, and surface treatment, make the peak value of the laser pulse act on the negative half-wave interval of the AC arc, and the frequency of the laser pulse is consistent with the frequency of the current. Refer to Figure 1, where welding magnesi...

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Abstract

The present invention is material processing composite heat source method, and has the technological scheme that during processing with composite laser-electric arc heat source, the output laser power pulse and the AC arc are controlled with the trigger signal of sync pulse for cooperative output, that is, the peak power of the laser pulse emerges always in the negative half wave region of the AC arc. The present invention includes coaxial or paraxial laser and arc; non-consumable electrode arc with gas protection, consumable electrode arc with gas protection or plasma arc; and solid YAG laser, CO2 laser or semiconductor laser. The present invention has positive effects of reduced laser energy consumption, the best utilization of laser energy, enhanced AC arc discharge in the negative half wave region, less influence of processing parameters and environment factors on the processing stability, raised arc stability, etc.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and relates to a material processing method, in particular to a composite heat source material processing method. Background technique [0002] When the laser and the arc act on the common area, there is an interaction between the laser and the arc, which is often said to be a laser-arc composite heat source material processing method. At present, the research and application of laser-arc composite heat sources basically use continuous laser or pulsed laser combined with continuous arc. According to our research, when the laser and the AC arc are combined, there is a matching relationship in which the energy is mutually enhanced and weakened. In the process of high-speed processing, the laser interacts with the arc. Although the arc can burn stably, there will be insufficient local thermionic emission, and the arc will drift and expand. At the same time, the plasma generated by the...

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Application Information

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IPC IPC(8): B23K28/02B23K9/095B23K26/20B23K26/21
Inventor 刘黎明宋刚
Owner DALIAN UNIV OF TECH
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