Laser-arc composite welding device based on heat input control and welding method

A hybrid welding and heat input technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of increased welding heat affected zone and thermal deformation, laser energy loss, increased welding heat input, etc. Heat-affected zone and thermal deformation, reducing heat input, achieving the effect of deposition rate

Active Publication Date: 2013-05-01
哈尔滨哈船特装科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of arc increases the heat input of welding, which inevitably increases the welding heat-affected zone and thermal deformation.
At the same time, the laser beam has to pass through the arc to reach the surface of the workpiece. When the arc current is large, the loss of laser energy is serious.

Method used

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  • Laser-arc composite welding device based on heat input control and welding method
  • Laser-arc composite welding device based on heat input control and welding method

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Experimental program
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Effect test

specific Embodiment approach 1

[0030] to combine figure 1 , which is an embodiment of non-melting electrode shunt control laser-arc hybrid welding heat input. This embodiment consists of fiber laser 1, arc welding power supply 2, wire feeding mechanism 3, melting electrode welding torch 5, and non-melting electrode welding torch (bypass welding torch) 8 , rheostat 10, rheostat controller 11, current sensor 13 and other components. The non-melting electrode welding torch 8 is filled with tungsten wire.

[0031] The steps of the welding method of the non-melting electrode shunt control laser-arc hybrid welding heat input device based on this embodiment are as follows:

[0032] Step 1: Process the part to be welded of the workpiece 15 into I-shaped, Y-shaped or V-shaped grooves as required. The surface is sanded and cleaned.

[0033] Step 2: During welding, the melting electrode welding torch 5 and the non-melting electrode welding torch 8 can be placed on both the front and rear sides of the laser head 6, ...

specific Embodiment approach 2

[0037] combine figure 2 , which is an embodiment of welding wire shunting to control the heat input of laser-arc hybrid welding. This embodiment consists of a fiber laser 1, an arc welding power source 2, a wire feeding mechanism 3, a main melting electrode welding torch 5, an auxiliary melting electrode welding torch 8, and a filler wire 9 , rheostat 11, rheostat controller 12, current sensor 13 and other components.

[0038] The steps of the welding method of the welding wire shunt control laser-arc hybrid welding heat input device based on this embodiment are as follows:

[0039] Step 1: Process the part to be welded of the workpiece 15 into an I-shaped, Y-shaped or V-shaped groove as required. Sand and wash.

[0040] Step 2: During welding, the main melting electrode welding torch 5 and the auxiliary melting electrode welding torch 8 can be placed on both the front and rear sides of the laser head 6, and can also be placed on the left and right sides of the laser head 6...

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Abstract

The invention provides a laser-arc composite welding device based on heat input control and a welding method. The laser-arc composite welding device based on the heat input control comprises a laser device, a laser head, an arc-welding power supply, a main consumable-electrode welding gun and a wire feeding mechanism and also comprises a bypass welding gun and a rheostat, wherein the laser head is connected with the laser device, the laser head is arranged above a workpiece, the main consumable-electrode welding gun and the bypass welding gun are symmetrically placed at both sides of a laser beam formed by the laser head, the main consumable-electrode welding gun is connected with the positive pole of the arc-welding power supply, the electrifying end of the workpiece is connected with the negative pole of the arc-welding power supply, and the bypass welding gun is connected with the negative pole of the arc-welding power supply by the rheostat. According to the laser-arc composite welding device based on the heat input control and the welding method, the welding heat input of a composite laser-arc heat source can be controlled, the heat affected zone and the welding deformation are reduced, and the metallurgical performance and the microstructure of a welding seam are improved. The laser-arc composite welding device based on the heat input control and the welding method not only are suitable for the fusion welding of homogeneous metal but also are suitable for the braze (fusion) welding of dissimilar metal, such as aluminum or steel and magnesium or steel.

Description

technical field [0001] The invention relates to a welding device, in particular to a laser and arc composite welding device. Background technique [0002] British scholar W. Steen proposed laser-arc composite heat source welding technology in the late 1970s. This composite process is considered to combine the advantages of laser and arc, that is, to combine the high energy density of laser and the large heating area of ​​arc, so as to improve the adaptability of laser welding to weld gap. At the same time, through the interaction between the laser and the arc, the coupling characteristics of the laser energy and the stability of the arc are improved to obtain a comprehensive effect. However, the introduction of arc increases the heat input of welding, which inevitably increases the heat-affected zone and thermal deformation of welding. At the same time, the laser beam has to pass through the arc to reach the surface of the workpiece. When the arc current is large, the loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K26/348
Inventor 苗玉刚韩端锋姚竞争李锋
Owner 哈尔滨哈船特装科技发展有限公司
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