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Overlap laser-arc hybrid welding of coated steel sheets

A laser arc, coating steel plate technology, applied in laser welding equipment, welding/welding/cutting items, welding equipment, etc., can solve the problems of forming quality, welding efficiency, bubble slag inclusion defects, etc., to achieve efficient and stable welding, forming Excellent quality effect

Inactive Publication Date: 2018-11-23
张家港创博金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a lap joint laser hybrid welding of coated steel plates, which solves the problems of forming quality, welding efficiency, bubble and slag inclusion defects caused by volatilization of coating metal in the prior art; the technology in the present invention can be single-pass Complete the welding of lap joints below 5mm, with good forming quality, high efficiency and no defects

Method used

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  • Overlap laser-arc hybrid welding of coated steel sheets
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  • Overlap laser-arc hybrid welding of coated steel sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0053] Use 1.5mm thick galvanized steel plate for upper and lower lap welding.

[0054] The laser beam spot diameter is 23mm, the welding wire diameter is 0.8mm, the dry elongation is 16mm, the welding speed is 3.2m / min, and the shielding gas is Ar+5-20% CO 2 , the flow rate is 35L / min, see Table 1 for other parameters.

[0055] The quality inspection results of welded joints are shown in Table 2.

Embodiment 3-4

[0057] Use 2.5mm thick galvanized steel plate for upper and lower lap welding.

[0058] The laser beam spot diameter is 25mm, the welding wire diameter is 1.0mm, the dry elongation is 18mm, the welding speed is 3.0m / min, and the shielding gas is Ar+5-20% CO 2 , the flow rate is 35L / min, see Table 1 for other parameters.

[0059] The quality inspection results of welded joints are shown in Table 2.

Embodiment 5-6

[0061] Use 4.0mm thick aluminized steel plate for upper and lower lap welding.

[0062] The laser beam spot diameter is 27mm, the welding wire diameter is 1.2mm, the dry elongation is 20mm, the welding speed is 2.8m / min, and the shielding gas is Ar+5-20% CO 2 , the flow rate is 35L / min, see Table 1 for other parameters.

[0063] The quality inspection results of welded joints are shown in Table 2.

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Abstract

The invention relates to overlap laser-arc hybrid welding of coated steel sheets. Swinging lasers and a wire-feeding arc are combined; the power of a laser beam is 0.5-2 kW, the angle of inclination between the laser beam and the vertical direction of the steel sheets is 10-20 degrees, and the light spot diameter is 22-28 mm; the laser beam swings in the width direction of the welded sheets, the swing frequency is 150-200 HZ, and the swing range is 0.5-1.0 mm; the angle of inclination between an arc wire-feeding mechanism and the steel sheets is 20-30 degrees, and the arc voltage is 25-35 V; the dry extension of welding wires is 15-20 mm, the welding speed is 2.5-3.5 m / min, the space between the arc and the laser beam is 3-8 mm, and the space between the overlap steel sheets is 0.3-0.7 mm;and the diameter of the welding wires is smaller than or equal to 1.6 mm, and the welding wires contain, by weight percentage, 0.01-0.04% of S and 0.65-1.20% of Si. The method is suitable for overlapwelding of galvanized steel sheets and aluminized steel sheets, the efficiency is high, and the joint quality is good.

Description

technical field [0001] The invention relates to lap welding of coated steel sheets, belonging to the field of welding technology, in particular to lap welding of galvanized and aluminized steel sheets, an efficient welding method capable of realizing high speed, high forming quality and no defects. Background technique [0002] Automotive structures involve the use of a large number of coated steel sheets to improve corrosion resistance. Due to the existence of low-melting-point coating metals, galvanized and aluminum-coated steel sheets are easy to evaporate during high-temperature welding, resulting in pores and defects, which affect the quality of welded joints. [0003] For galvanized steel sheets, zinc vapor is easy to occur and is not easy to remove by protective gas, so defects such as pores and inclusions are prone to occur; Compounds are involved in the weld, thereby destroying the quality of the weld. In the lap welding of steel plates, due to structural and spac...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K103/04B23K101/18
CPCB23K26/348
Inventor 朱俊李小宝潘鑫
Owner 张家港创博金属科技有限公司
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