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Vacuum welding device and method for preventing laser seam from generating pores

A vacuum welding and laser technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of scrapping steel plates, and achieve the effect of good welding seam quality, avoiding air and welding seam contact, and not easy to be oxidized.

Inactive Publication Date: 2016-02-03
武汉钢铁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Pores are a kind of welding defect. When the steel plate is stamped, the porosity often becomes the fracture source of the steel plate cracking, which makes the steel plate unusable due to the fracture and scrapped.

Method used

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  • Vacuum welding device and method for preventing laser seam from generating pores
  • Vacuum welding device and method for preventing laser seam from generating pores

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 and figure 2 A vacuum welding device for preventing air holes in laser welds shown in , includes a laser 1, a welding chamber 2, a focusing head 3, and a vacuum pump 11; the laser 1 and the vacuum pump 11 are located outside the welding chamber 2, and the One end of the focusing head 3 is connected with the laser device 1 through a laser conduction line, and the other end of the focusing head 3 is inserted into the welding chamber 2; one side of the welding chamber 2 is provided with a pre-evacuation chamber 6, and the welding chamber 2 The other side is provided with post-welding sampling chamber 10, and described welding chamber 2 is all communicated with described pre-evacuated chamber 6 and described post-welded sampling chamber 10; Described pre-evacuated chamber 6, described welding chamber 2 and The p...

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Abstract

The invention relates to a vacuum welding method for preventing a laser seam from generating pores. A vacuum welding device for preventing the laser seam from generating the pores is designed for the method. The vacuum welding device comprises a laser, a welding chamber, a focusing head and a vacuum pump; the laser and the vacuum pump are located outside the welding chamber; one end of the focusing head is connected with the laser through a laser conducting cable; the other end of the focusing head is inserted into the welding chamber; a pre-vacuum-pumping chamber is arranged on one side of the welding chamber; a postwelding sampling chamber is arranged on the other side of the welding chamber; the welding chamber is communicated with the pre-vacuum-pumping chamber and the postwelding sampling chamber; the pre-vacuum-pumping chamber, the welding chamber and the postwelding sampling chamber are communicated with the vacuum pump. The vacuum welding device and method for preventing the laser seam from generating the pores can prevent from generating the pores when the laser seam is solidified, the process is simple, and operation is convenient.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a vacuum welding device and method for preventing pores from being generated in laser welding seams. Background technique [0002] Laser welding is widely used in the production of automotive components due to its advantages of small welding heat affected zone, less deformation of weldments, no need for electrodes and solder. [0003] However, the cooling speed of laser welding is fast, the weld seam has no protective measures, and pores are easy to form when the molten pool metal solidifies. Those skilled in the art have analyzed and found that the main reason is that when the nitrogen in the atmosphere is involved in the weld pool, if the cooling rate is slow, the gas can float up and overflow into the atmosphere, while the cooling rate of laser welding is fast, and the nitrogen in the molten pool And other gases are often too late to float out and are solidified in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/12B23K26/24B23K26/70
CPCB23K26/1224B23K26/24
Inventor 张彦文王志奋吴立新陈士华徐国涛许竹桃
Owner 武汉钢铁有限公司
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