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A laser welding method in which the thickness of the welded steel plate exceeds the allowable thickness of the laser machine

A technology of laser welding and welding steel plates, applied in the laser welding field where the thickness of the welded steel plate exceeds the allowable thickness of the laser machine, it can solve the problems of unstable, complicated, and difficult to process welds, and achieve stable weld quality and easy processing. The effect of forming and welding deformation is small

Active Publication Date: 2020-11-24
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the problems existing in existing laser welding that it cannot weld steel plates thicker than its welding depth, or the groove is not easy to process, and the welding seam is unstable and complicated, and provides a laser welding machine that can be used regardless of the power of the laser welding machine. , can weld steel plates thicker than its welding depth, and the welding joint is easy to process and shape, the welding deformation is small, and the laser welding method with stable weld quality

Method used

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  • A laser welding method in which the thickness of the welded steel plate exceeds the allowable thickness of the laser machine
  • A laser welding method in which the thickness of the welded steel plate exceeds the allowable thickness of the laser machine
  • A laser welding method in which the thickness of the welded steel plate exceeds the allowable thickness of the laser machine

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Embodiment 1

[0027] The thickness of the steel plate to be welded in this embodiment is 8 mm, and the processed L shapes of the two substrates to be welded by equal thickness laser are respectively marked as L 1 and L 1 ;The power of the laser welding machine is 4000kw, and the welding depth of a single pass is 5mm; so 8mm-5mm=3mm, the remaining 3mm is L 1 and L 2 The L-shaped number n is 0, L 1-末 and L 2-末 The number of L-shape is 1, and the thickness of each is 3mm; after measurement, the groove 末 The cross-sectional diameter of the laser beam corresponding to the 8mm opening is 6.5mm; the melting width of a single-pass weld is 3mm; the L-shape is processed by cutting.

[0028] The present embodiment steel plate laser welding method, its steps:

[0029] 1) Along the thickness direction of the sides to be welded of the two substrates to be welded with equal thickness, a section of single laser energy welding without processing is reserved at a distance of 5mm, and the rest is proces...

Embodiment 2

[0039] The thickness of the steel plate to be welded in this embodiment is 15mm, and the processed L-shape of the two substrates for equal thickness laser welding is respectively marked as L 1 and L 2 ;The power of the laser welding machine is 4000kw, and the welding depth of a single pass is 5mm; so 15mm-5mm=10mm, and the remaining 10mm is L 1 and L 2 The number of L-shaped n is 2; after measurement, by L 1 and L 2 groove formed 1 The height of the opening, that is, the cross-sectional diameter of the laser beam corresponding to the substrate 10mm is 8mm, and the groove 1 The opening of the substrate, that is, the cross-sectional diameter of the laser beam corresponding to the 10mm position of the substrate is 8mm; the groove 2 The opening of the laser beam corresponding to the 15mm position of the substrate has a cross-sectional diameter of 11mm; the melting width of a single-pass weld is 3mm; the L-shape is processed by cutting.

[0040] The laser welding method of p...

Embodiment 3

[0052] The thickness of the steel plate to be welded in this embodiment is 18mm, and the processed L-shape of the two substrates to be welded by equal-thickness laser welding is respectively marked as L 1 and L 2 ;The power of the laser welding machine is 4000kw, and the welding depth of a single pass is 5mm; so 18mm-5mm=13mm, and the remaining 13mm is L 1 and L 2 The number of L-shaped n is 3, L 1-末 and L 2-末 Each remaining thickness is 3mm; after measurement, by L 1 and L 2 groove formed 1 The height of the opening, that is, the cross-sectional diameter of the laser beam corresponding to the substrate 10mm is 8mm, and the groove 1 The opening of the substrate, that is, the cross-sectional diameter of the laser beam corresponding to the 10mm position of the substrate is 8mm; the groove 2 The opening of the substrate is 15mm corresponding to the cross-sectional diameter of the laser beam is 11mm, the groove 末 The cross-sectional diameter of the laser beam correspondin...

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Abstract

The invention provides a laser welding method with the thickness of a welded steel plate exceeding the allowed thickness of a laser machine. A segment of depth which does not need to be machined and can be welded by a laser once is reserved in advance in the thickness direction of to-be-welded edges of two to-be-welded base plates of the same thickness, and the residual depths are machined into Lshapes of different widths; unprocessed weld joints with the thickness being a on the two to-be-welded base plates are welded; a first groove profile spliced by the two base plates is neatly filled with groove filling blocks; the base plates and the groove filling blocks in the first groove profile are welded; and n machined grooves formed by L1-n and L2-n are welded step by step according to step3 and step 4, and finally the last groove formed by L1-last and L2-last is welded. By means of the laser welding method, the steel plate which is thicker than that subjected to laser welding of an owned laser welding machine once can be welded, the matched laser welding machine does not need to be purchased, a welded junction is easy to machine and form, welding deformation is small, weld joint quality is stable, and the advantages of the laser welding machine are fully played.

Description

technical field [0001] The invention relates to a welding method of a steel plate, which specifically belongs to a laser welding method, and is particularly suitable for a laser welding method in which the thickness of a welded steel plate exceeds the allowable thickness of a laser machine. Background technique [0002] Because laser welding has the characteristics of large penetration depth, large aspect ratio, fast welding speed, low heat input, and small deformation, it has attracted more and more attention from the industry and has been used in the production and manufacture of medium and heavy industries. Among them, such as ships, nuclear power, steel, energy, oil and gas pipelines, etc. [0003] However, in the prior art, due to the restriction of the power of the laser welding machine, the welding depth of each laser welding machine with a certain power is limited, that is to say, it can only weld the thickness matching the depth defined by the welding machine. stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/24
CPCB23K26/24
Inventor 钟如涛赵广威高俊徐军王军
Owner 武汉钢铁有限公司