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Laser-InFocus electric arc double-face symmetric composite welding method

An infocus and hybrid welding technology, which is applied in the field of laser-InFocus arc double-sided symmetrical composite welding, can solve the problems of high laser power requirements and high costs, and achieve the effects of improving welding quality, reducing equipment costs, and increasing the aspect ratio

Active Publication Date: 2015-12-23
哈尔滨工大焊接科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve many problems such as high laser power requirement and high cost during laser-TIG double-sided welding of medium and thick plates, and proposes a laser-InFocus arc double-sided symmetrical composite welding method

Method used

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  • Laser-InFocus electric arc double-face symmetric composite welding method
  • Laser-InFocus electric arc double-face symmetric composite welding method
  • Laser-InFocus electric arc double-face symmetric composite welding method

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specific Embodiment approach 1

[0025] Specific embodiment one: a kind of laser-InFocus electric arc double-sided symmetric composite welding method of the present embodiment, it is carried out according to the following steps:

[0026] Step 1: Process the workpiece to be welded into an I-shaped or Y-shaped groove, and grind and clean the processed groove and the surfaces on both sides, and fix the polished and cleaned workpiece to be welded on the welding fixture ;

[0027] Step 2: keep the laser beam and the InFocus arc welding torch on the same axis during the welding process, and the angle between the axis and the workpiece is 85° to 95°;

[0028] Step 3: Set the welding process parameters: the spot diameter is 0.1-0.5mm, the defocus is ﹣3-﹢3mm, the laser power is 500-5000W, the InFocus arc current is 50-1000A, and the welding speed is 50-900mm / min , both the laser and InFocus shielding gas use Ar gas, the laser shielding gas flow rate is 10-30L / min, and the InFocus shielding gas flow rate is 10-25L / min...

specific Embodiment approach 2

[0031] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the hybrid welding is to use the laser and the InFocus electric arc to be welded in parallel with the direction of the welding seam, and the welding conditions are: the welding torch and the laser head are in the The same plane, and the plane is perpendicular to the direction of the weld, the laser head is located on the side of the workpiece with a relatively high melting point among the workpieces to be welded, and the focus of the laser beam is focused on the edge of the side of the workpiece with a relatively high melting point among the butt welded workpieces to be welded, The angle between the laser beam and the vertical direction is 5-30°; the welding torch of the InFocus arc is located on the side of the workpiece with a relatively low melting point among the workpieces to be welded, and the welding torch is placed at the center of the weld gap. Others are the same as ...

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the angle between the axis and the workpiece in step 2 is 90°-95°. Others are the same as in the first embodiment.

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Abstract

The invention discloses a laser-InFocus electric arc double-face symmetric composite welding method, and relates to welding methods. The method comprises the steps of firstly, machining and grinding or cleaning a workpiece to be welded; secondly, adjusting the position of an InFocus welding gun and the position of a laser head; thirdly, setting welding parameters, wherein the diameter of light spots ranges from 0.1 mm to 0.5 mm, the defocusing amount ranges from -3mm to 3 mm, the laser power ranges from 500 W to 5000 W, the electric arc current of the InFocus welding gun ranges from 50 A to 1000 A, the welding speed ranges from 50 mm / min to 900 mm / min, Ar gas protection is carried out, the gas flow ranges from 10 L / min to 30 L / min, and the InFocus protection gas flow ranges from 10 L / min to 25 L / min; and fourthly, carrying out composite welding. The InFocus welding gun and a TIG welding machine are matched well, a dedicated power source is not needed, the equipment cost is reduced, the welding gun is reliable and durable, the interchangeability of the consumable is good, and due to the design of the InFocus welding gun, mechanization and automation are easily achieved.

Description

technical field [0001] The invention relates to a laser-InFocus arc double-sided symmetrical composite welding technology, which belongs to the field of material processing engineering. Background technique [0002] In welding production, how to improve product quality and welding productivity and reduce welding cost has always been an urgent problem to be solved. Due to the advantages of high power density, large penetration depth at the same heat input, narrow heat-affected zone, small welding deformation, and fast welding speed, lasers have been more and more widely used in welding production. However, laser welding also has some disadvantages, such as low energy conversion and utilization rate, high welding cost, especially difficult to weld aluminum alloy materials with high reflectivity and high thermal conductivity; the welding process is unstable, and to a large extent This limits the scope of application of laser welding technology. [0003] The use of laser fille...

Claims

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Application Information

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IPC IPC(8): B23K26/348
Inventor 杨雨禾雷正龙陈彦宾张可召李鹏
Owner 哈尔滨工大焊接科技有限公司
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