Tailored blank laser welding method for improving production efficiency and quality of aluminum alloy plate blanks

A technology of aluminum alloy sheet and laser tailor welding, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., and can solve the problems of inability to apply laser tailor welding of aluminum alloy sheet, failure of sheet to achieve good strength performance, difficulty and high cost , to make up for the reduction of joint strength and plasticity, avoid welding thermal cracks, and improve the utilization rate

Active Publication Date: 2020-08-25
SHANGHAI BAOSTEEL & ARCELOR TAILOR METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, aluminum alloy plates stamped and formed from flat plates have been widely used in the manufacture of body structural parts. The form of a flat plate as a whole plate is the mainstream application status, and the difficulty and cost of stamping the entire plate are relatively high; in order to improve material utilization Higher efficiency and lower cost can be achieved by tailor welding of aluminum alloy sheets of different thicknesses and strengths; however, welding pores and low joint strength are prone to occur in sheets of different thicknesses and strengths during the laser tailor welding process, resulting in Good strength properties cannot be achieved during the stamping process, especially the 5xxx series automotive aluminum alloy sheets represented by 5182 aluminum alloy sheets. The magnesium content in the 5xxx series aluminum alloy sheets is relatively high, which is the main strengthening element of the sheet, while the 2xxx series and Aluminum alloy plates such as 6xxx series rely on heat treatment to strengthen
5xxx series aluminum alloy plates tend to cause metal magnesium to evaporate at high temperature during welding, which leads to loss of strength of the material
This welding method reduces the temperature gradient during the welding process through temperature control and vibration, thereby reducing the generation of welding pores and cracks, and has high energy consumption. It is only suitable for welding 2219 aluminum alloys, and cannot be applied to 5xxx series such as 5182 with different thicknesses. Laser Tailored Welding of Aluminum Alloy Sheet

Method used

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  • Tailored blank laser welding method for improving production efficiency and quality of aluminum alloy plate blanks
  • Tailored blank laser welding method for improving production efficiency and quality of aluminum alloy plate blanks
  • Tailored blank laser welding method for improving production efficiency and quality of aluminum alloy plate blanks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The welding base material is two 5182 aluminum alloy plates, namely the first workpiece 10 and the second workpiece 20. The size of the first workpiece 10 is 300mm*400mm*1.5mm, and the size of the second workpiece 20 is 300mm*400mm*2mm. The hydrogen content in the two 5182 aluminum alloy plates is 0.12ml / 100g. Place the first workpiece 10 and the second workpiece 20 on several vacuum chucks of the copper plate assembly, adjust the lower surface of the first workpiece 10 and the lower surface of the second workpiece 20 to be aligned on the upper surface of the copper plate through the copper plate assembly, and the first The gap between the workpiece 10 and the second workpiece 20 is 0.1 mm, and the welding seam is a straight line.

[0072] An 800-watt pulsed laser is used to generate the first cleaning laser beam 30 and the second cleaning laser beam 40 through the beam splitter, the pulse period of the first cleaning laser beam 30 and the second cleaning laser beam 40 ...

Embodiment 2

[0079] The welding base material is two 5182 aluminum alloy plates, namely the first workpiece 10 and the second workpiece 20. The size of the first workpiece 10 is 300mm*400mm*1.0mm, and the size of the second workpiece 20 is 300mm*400mm*1.5mm. The hydrogen content in the two 5182 aluminum alloy plates was detected to be 0.12ml / 100g. Place the first workpiece 10 and the second workpiece 20 on several vacuum chucks of the copper plate assembly, adjust the lower surface of the first workpiece 10 and the lower surface of the second workpiece 20 to be aligned on the upper surface of the copper plate through the copper plate assembly, and the first The gap between the workpiece 10 and the second workpiece 20 is 0.1 mm, and the welding seam is a straight line.

[0080] An 800-watt pulsed laser is used to generate the first cleaning laser beam 30 and the second cleaning laser beam 40 through the beam splitter, the pulse period of the first cleaning laser beam 30 and the second clean...

Embodiment 3

[0088] The welding base material is two 5182 aluminum alloy plates, namely the first workpiece 10 and the second workpiece 20. The size of the first workpiece 10 is 300mm*400mm*1.0mm, and the size of the second workpiece 20 is 300mm*400mm*1.5mm. The hydrogen content in the two 5182 aluminum alloy plates was detected to be 0.12ml / 100g. Place the first workpiece 10 and the second workpiece 20 on several vacuum chucks of the copper plate assembly, adjust the lower surface of the first workpiece 10 and the lower surface of the second workpiece 20 to be aligned on the upper surface of the copper plate through the copper plate assembly, and the first The gap between the workpiece 10 and the second workpiece 20 is 0.1 mm, and the welding seam is arc-shaped with a radius of 290 mm.

[0089] An 800-watt pulsed laser is used to generate the first cleaning laser beam 30 and the second cleaning laser beam 40 through the beam splitter, the pulse period of the first cleaning laser beam 30 a...

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Abstract

The invention discloses a tailored blank laser welding method for improving the production efficiency and quality of aluminum alloy plate blanks. The tailored blank laser welding method is used for tailor welding of 5xxx series aluminum alloy plates with different thicknesses. The tailored blank laser welding method comprises the steps that 1, the hydrogen element concentration of a first workpiece (10) and a second workpiece (20) is smaller than a threshold value, and the step 2 is executed; 2, a weld joint of the first workpiece and the second workpiece is cleaned, and an oxide layer and anoil film layer in a welding area are removed; and 3, the first workpiece and the second workpiece are spliced through a copper plate assembly, a welding laser beam (50) is adopted for carrying out tailored blank laser welding on the front faces of the welding areas of the first workpiece and the second workpiece through welding wires (52), and air injection protection is carried out during welding. According to the tailored blank laser welding method, tailored blank laser welding can be performed on the aluminum alloy plates with the different thicknesses and different strengths to prepare theblanks suitable for automobile body components, stamping whole aluminum plates is not needed, the weight of the plates is reduced, the utilization rate of materials is increased, the production costis reduced, and industrial mass production can be realized.

Description

technical field [0001] The invention relates to a welding method for a plate blank, in particular to a laser tailor welding method for improving the production efficiency and quality of an aluminum alloy plate blank. Background technique [0002] At present, aluminum alloy plates stamped and formed from flat plates have been widely used in the manufacture of body structural parts. The form of a flat plate as a whole plate is the mainstream application status, and the difficulty and cost of stamping the entire plate are relatively high; in order to improve material utilization Higher efficiency and lower cost can be achieved by tailor welding of aluminum alloy sheets of different thicknesses and strengths; however, welding pores and low joint strength are prone to occur in sheets of different thicknesses and strengths during the laser tailor welding process, resulting in Good strength properties cannot be achieved during the stamping process, especially the 5xxx series automo...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/24B23K26/12
CPCB23K26/21B23K26/24B23K26/12
Inventor 方奇飞王珏姚安崔玉林单宝颜耀辉
Owner SHANGHAI BAOSTEEL & ARCELOR TAILOR METAL
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