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Welding method of laser tailor-welded plate

A welding method and laser tailor welding technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve problems such as easy generation of defects, and achieve the effect of improving the utilization rate of steel and reducing production costs

Active Publication Date: 2019-11-22
DONGFENG LIUZHOU MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a welding method of laser tailor welded blanks, so as to solve the problem that the two ends of the existing laser tailor welded blanks are prone to defects

Method used

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  • Welding method of laser tailor-welded plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 The laser tailor-welded blank is welded to the first steel plate 1 and the second steel plate 2 through the weld 3, the first steel plate 1 in this embodiment is a cold rolled plate with a thickness of 2.2 mm and 780DP, and the second steel plate 2 is 590DP, a cold-rolled plate with a thickness of 1.6 mm, the thickness of the first steel plate 1 is greater than the thickness of the second steel plate 2, and the first steel plate 1 and the second steel plate 2 are laser tailor-welded into a laser tailor-welded plate. The welding method includes the following step:

[0018] A. Blanking and blanking: Firstly, the first slab and the second slab are punched into the first steel plate 1 and the second steel plate 2 with two lateral sides and two longitudinal sides, and two of the first steel plate 1 The transverse sides are transverse side 1-1 and transverse side 1-2 respectively. The two transverse sides of the second steel plate 2 are transverse side 2-1 and t...

Embodiment 2

[0023] Such as figure 1 The laser tailor-welded blank is welded to the first steel plate 1 and the second steel plate 2 by welding seam 3. The first steel plate 1 in this embodiment is a cold rolled plate with a thickness of 780DP and a thickness of 2.2 mm, and the second steel plate 2 is 590DP, a cold-rolled plate with a thickness of 1.6 mm. The thickness of the first steel plate 1 is greater than that of the second steel plate 2. The welding method of the first steel plate 1 and the second steel plate 2 by laser welding to form a laser tailor-welded plate includes the following step:

[0024] A. Blanking and blanking: Firstly, the first slab and the second slab are punched into the first steel plate 1 and the second steel plate 2 with two lateral sides and two longitudinal sides, and two of the first steel plate 1 The transverse sides are transverse side 1-1 and transverse side 1-2 respectively. The two transverse sides of the second steel plate 2 are transverse side 2-1 and tr...

Embodiment 3

[0029] Such as figure 1 The laser tailor-welded blank is welded to the first steel plate 1 and the second steel plate 2 by welding seam 3. The first steel plate 1 in this embodiment is a cold rolled plate with a thickness of 780DP and a thickness of 2.2 mm, and the second steel plate 2 is 590DP, a cold-rolled plate with a thickness of 1.6 mm. The thickness of the first steel plate 1 is greater than that of the second steel plate 2. The welding method of the first steel plate 1 and the second steel plate 2 by laser welding to form a laser tailor-welded plate includes the following step:

[0030] A. Blanking and blanking: Firstly, the first slab and the second slab are punched into the first steel plate 1 and the second steel plate 2 with two lateral sides and two longitudinal sides, and two of the first steel plate 1 The transverse sides are transverse side 1-1 and transverse side 1-2 respectively. The two transverse sides of the second steel plate 2 are transverse side 2-1 and tr...

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Abstract

The invention discloses a welding method of a laser tailor-welded plate. The welding method of a laser tailor-welded plate comprises the following steps of, A, blanking, firstly blanking a first steelplate blank and a second steel plate blank into a first steel plate and a second steel plate; and the two ends of one longitudinal side edge of the second steel plate are correspondingly blanked by one process gap; B, tailoring plates, tailoring the first steel plate and the second steel plate to obtain tailoring welding edges, and enclosing the process gaps at the two ends of the first steel plate and the second steel plate into two tailor welding gaps; C, laser welding, firstly, making the laser travel 0.5mm along the welding direction at one end of the gap side edge of the first steel plate of the tailor welding gap, starting the laser arc, then carrying out the welding along the tailoring welding edge of the first steel plate and the second steel plate to form a welding joint, and finally, moving the laser to the other tailor welding gap, and stopping welding when the laser advances to the other tailor-welding gap and is 0.5mm away from the other end of the gap side edge of the first steel plate. Compared with the prior art, the welding method of a laser tailor-welded plate can solve the problem that defects are easy to occur at both ends of the welding joint of the existing laser tailor-welded plate.

Description

Technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a welding method of laser tailor-welded blanks for automobile manufacturing. Background technique [0002] Laser tailor-welded blanks are usually composed of two steel plates with different strengths and thicknesses through laser tailored welding. Now they are widely used in the production of automobile body-in-white front rails, door inner panels, panoramic sunroofs and other parts. In the tailor-welded laser tailor-welded blanks, it was found that the area of ​​0 to 5 mm at both ends of the weld is very easy to produce defects, resulting in the subsequent stamping and cracking of the parts; to ensure that the defects at both ends of the weld do not appear on the parts, laser tailor-welding The two ends of the plate weld are removed, which reduces the utilization of steel. Now, engineers have used dynamic adjustment of laser welding parameters to try to improve the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/24B23K26/60
CPCB23K26/0093B23K26/24B23K26/60
Inventor 蒋文海覃天庞廖勇
Owner DONGFENG LIUZHOU MOTOR
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