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Bifocus laser and InFocus arc hybrid welding method

A hybrid welding and dual focus technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of increased welding cost, high laser power, small welding penetration, etc., which is conducive to discharge and simple replacement of consumables , the effect of increasing welding penetration

Inactive Publication Date: 2015-10-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the small penetration depth of traditional MIG and TIG welding, the penetration depth of the weld seam is mainly determined by the laser. Therefore, a large laser power is required when welding medium and thick plates, which increases the welding cost.

Method used

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  • Bifocus laser and InFocus arc hybrid welding method
  • Bifocus laser and InFocus arc hybrid welding method
  • Bifocus laser and InFocus arc hybrid welding method

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specific Embodiment approach 1

[0033] Specific embodiment one: a kind of bifocal laser and InFocus electric arc hybrid welding method of the present embodiment, it is to carry out according to the following steps:

[0034] 1. Before welding, grind or clean the surface of the workpiece to be welded, and fix the polished or cleaned workpiece to be welded on the welding fixture;

[0035] 2. Use the laser and InFocus to act together on the area to be welded, and set the geometric parameters: the spot diameter is 0.1~0.5mm, and the defocus is -3~﹢3mm;

[0036]3. Set the welding parameters of laser and InFocus composite welding: the arc current is 50-900A, the angle between the welding torch and the vertical direction is 25°-55°, the welding speed is 100-1000mm / min, and the wire feeding speed is 100-600mm / min. min, the protective gas is an inert gas, and the flow rate of the protective gas is 15-30L / min;

[0037] 4. Start the control switch, first pass in the shielding gas, and then ignite the arc for 1.0-2.0s, ...

specific Embodiment approach 2

[0038] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the laser of the bifocal laser is CO 2 Gas laser, YAG solid-state laser, semiconductor laser or fiber laser. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the two beams of the bifocal laser are obtained in the following two ways: one beam of laser is divided into two beams by an optical beam splitting system and two beams emitted by two lasers beams. Others are the same as in the first embodiment.

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Abstract

The invention discloses a bifocus laser and InFocus arc hybrid welding method, and relates to a welding method. The method includes the steps that (1) a to-be-welded workpiece is polished or washed; (2) the spot diameter is set to range from 0.1 mm to 0.5 mm, and the defocusing amount ranges from -3 mm to +3 mm; (3) welding parameters are set, wherein the arc current ranges from 50 A to 900 A, an included angle formed between a welding gun and the vertical direction ranges from 25 degrees to 55 degrees, the welding speed ranges from 100 mm / min to 1000 mm / min, the wire feeding speed ranges from 100 mm / min to 600 mm / min, the protection gas is inert gas, and the flow of the protection gas ranges from 15 L / min to 30 L / min; and (4) a switch is started, and laser-InFocus arc welding is carried out. According to bifocus lasers and InFocus, as the InFocus arc fusion depth is larger, and a key hole can be formed through welding, when a medium-thickness plate is welded, the lasers can directly act on the bottom of the key hole generated by the InFocus arc, and the fusion depth is continuously increased.

Description

technical field [0001] The invention proposes a dual-focus laser and InFocus arc composite welding method, which belongs to the field of material processing engineering. Background technique [0002] As a precise, efficient and fast high-energy beam welding method, laser welding has been more and more widely used in the aerospace field. However, conventional laser welding also has some problems and defects, such as low utilization rate of laser energy, high assembly precision requirements, expensive equipment and so on. In order to solve these problems, several new laser welding technologies have been proposed: one is multi-focus laser welding technology, this welding method can improve the utilization rate of laser energy, improve the stability of the welding process, improve the quality of weld seam, and reduce the Requirements for assembly accuracy. The other is the hybrid welding technology, which uses laser and other heat sources together as the welding heat source. T...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/24
CPCB23K26/24B23K26/348
Inventor 陈彦宾雷正龙杨雨禾陈曦
Owner HARBIN INST OF TECH
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