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Laser-arc hybrid welding process

A laser arc and hybrid welding technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low gap and low steel plate thickness, and achieve the effect of increasing penetration and excellent forming.

Inactive Publication Date: 2018-01-12
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

[0004] The object of the present invention is to provide a laser arc hybrid welding method in which the laser beam and the arc are oscillating synchronously, which solves the problems of low gap and low steel plate thickness in the prior art, and can complete the welding of steel plates with a gap of 8mm and a thickness of 20mm in a single pass

Method used

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  • Laser-arc hybrid welding process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The thickness of the welding plate is 10mm, and the gap between the welding plates is 5mm.

[0032] The laser power is 8 kilowatts, the defocus is 2-4mm, and the spot diameter is 4-7mm.

[0033] The inclination angle between the welding wire and the welding plate is 48°; the diameter of the first group of welding wires is 1.2mm, and the distance between the welding wires is 2mm; the current of the first group of welding wires is 160-180A.

[0034] The oscillation frequency of the laser beam and electric arc is 30 Hz, and the oscillation amplitude is 3 mm.

[0035] Lay a layer of metal powder under the welding wire, the thickness of the powder layer is 2mm.

[0036] The welding speed is 1.4m / min.

[0037] Inspection results: full penetration, no undercut, well-formed welds, and no defects.

Embodiment 2

[0039] The thickness of the welding plate is 20mm, and the gap between the welding plates is 8mm.

[0040] The laser power is 18 kilowatts, the defocus is 3-7mm, and the spot diameter is 5-10mm.

[0041] The inclination angle between the welding wire and the welding plate is 55°, the diameter of the first group of welding wires is 1.6mm, and the distance between welding wires is 3.5mm; the diameter of the second group of welding wires is 2.4mm, and the distance between welding wires is 5.0mm; The energizing current of the two sets of welding wires is 160-220A.

[0042] The oscillation frequency of the laser beam and electric arc is 16 Hz, and the oscillation amplitude is 6 mm.

[0043] Lay a layer of metal powder under the welding wire, the thickness of the powder layer is 5mm.

[0044] The welding speed is 0.9m / min.

[0045] Inspection results: full penetration, no undercut, well-formed welds, and no defects.

Embodiment 3

[0047] The thickness of the welding plate is 16mm, and the gap between the welding plates is 6mm.

[0048] The laser power is 15 kilowatts, the defocus is 3-6mm, and the spot diameter is 5-8mm.

[0049] The inclination angle between the welding wire and the welding plate is 53°; the diameter of the first group of welding wires is 1.6mm, and the distance between welding wires is 3.2mm; the diameter of the second group of welding wires is 2.0m, and the distance between welding wires is 4.8mm; The energizing current of the two sets of welding wires is 150-180A.

[0050] The oscillation frequency of the laser beam and electric arc is 22 Hz, and the oscillation amplitude is 5 mm.

[0051] Lay a layer of metal powder under the welding wire, the thickness of the powder layer is 4mm.

[0052] The welding speed is 1.0m / min.

[0053] Inspection results: full penetration, no undercut, well-formed welds, and no defects.

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Abstract

The invention relates to a laser-arc hybrid welding process. The output power of a laser device is 6-18 kilowatt. The laser spot is 3-8 mm. The diameter of a welding wire is 1.2-2.4 mm. The electrifying current of the welding wire is 100-320 A. The laser beam and the welding wire synchronously swing in the direction perpendicular to the welding direction at the frequency of 10-40 Hz, and the swinging amplitude is 0.6-0.8 times that of a welding plate interval. Metal powder can be pre-laid in the interval. The welding speed is 0.8-1.6 m / min, and efficient welding of large-interval large-thickness grooves can be achieved.

Description

technical field [0001] The invention relates to a laser arc hybrid welding, which belongs to the field of welding technology, in particular to a hybrid welding method in which a laser beam and an electric arc oscillate synchronously. Background technique [0002] The arc laser hybrid welding method, which takes into account the advantages of high penetration of laser welding and high melting width of arc welding, has been applied in the industry. In general, the laser is in front and the arc is in the back, so as to achieve better process performance. While the arc molten pool fills the welding gap, it also achieves a better weld transition, thereby ensuring welding quality. [0003] For the butt joint of steel plates with a welding gap within 2-3mm, arc laser welding with optimized parameters can achieve a better weld bead. However, when the gap between the welding plates exceeds 3-5 mm, the prior art cannot achieve full welding in a single pass. In addition, when the th...

Claims

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Application Information

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IPC IPC(8): B23K26/348
Inventor 李晶
Owner 张家港创博金属科技有限公司
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