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Weak-atmosphere environment laser welding device and method

An atmospheric environment, laser welding technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, to ensure long-term operation, reduce manufacturing costs, and ensure high-quality welding effects

Pending Publication Date: 2020-09-08
武汉光谷航天三江激光产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a laser welding device and method in a weak atmosphere environment, which achieves laser welding in a weak atmosphere environment through low vacuum and a small amount of inert gas protection, which greatly reduces the problems of high cost and low efficiency of existing vacuum laser welding, and at the same time The inert gas is used as a carrier to more effectively remove the fume and spatter generated during the welding process, achieving greater welding depth, better welding quality and surface quality

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  • Weak-atmosphere environment laser welding device and method

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Effect test

Embodiment 1

[0036] A laser welding method in a weak atmosphere environment, comprising the following steps:

[0037] S1. Put the workpiece to be welded into the working cabin, and make the atmosphere in the working cabin form a protective gas atmosphere under low vacuum through the protective gas storage device and exhaust device;

[0038] S2. Turn on the gas circulation device, the welding head emits laser light through the light-transmitting lens set on the surface of the working cabin, and welds the workpiece to be welded. After the welding is completed, the workpiece is taken out.

[0039] In step S1, the protective gas atmosphere under the low vacuum is obtained by a pressure sensor and an oxygen content sensor in the working chamber, the low vacuum degree of the pressure sensor is 10-1000Pa, and the oxygen content of the oxygen content sensor is below 1000ppm .

[0040] Such as figure 1 As shown, the device for laser welding in a weak atmosphere environment using the method includ...

Embodiment 2

[0047] A laser welding method in a weak atmosphere environment, comprising the following steps:

[0048] S1. Put the workpiece to be welded into the working cabin, and make the atmosphere in the working cabin form a protective gas atmosphere under low vacuum through the protective gas storage device and exhaust device;

[0049] S2. Turn on the gas circulation device, the welding head emits laser light through the light-transmitting lens set on the surface of the working cabin, and welds the workpiece to be welded. After the welding is completed, the workpiece is taken out.

[0050] In step S1, the protective gas atmosphere under the low vacuum is obtained by the pressure sensor and the oxygen content sensor in the working chamber, the low vacuum degree of the pressure sensor is 100 Pa, and the oxygen content of the oxygen content sensor is below 1000 ppm.

[0051] The method is a laser welding device in a weak atmosphere environment, including a working cabin, a welding head i...

Embodiment 3

[0058] A laser welding method in a weak atmosphere environment, comprising the following steps:

[0059] S1. Put the workpiece to be welded into the working cabin, and make the atmosphere in the working cabin form a protective gas atmosphere under low vacuum through the protective gas storage device and exhaust device;

[0060] S2. Turn on the gas circulation device, the welding head emits laser light through the light-transmitting lens set on the surface of the working cabin, and welds the workpiece to be welded. After the welding is completed, the workpiece is taken out.

[0061] In step S1, the protective gas atmosphere under the low vacuum is obtained by the pressure sensor and the oxygen content sensor in the working chamber, the low vacuum degree of the pressure sensor is 400Pa, and the oxygen content of the oxygen content sensor is below 1000ppm.

[0062] In step S2, the gas circulation device is opened so that the gas flow circulating in the working cabin is at 40M 3 ...

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Abstract

The invention discloses a weak-atmosphere environment laser welding device and method. The method comprises the following steps that S1, a to-be-welded workpiece is placed into a working cabin, a gasstorage device and an exhaust device are protected, and the atmosphere environment inside the working cabin forms the protective gas atmosphere under low vacuum; S2, a gas circulation device is turnedon, a welding head emits laser and penetrates through a light transmitting lens arranged on the surface of the working cabin, the to-be-welded workpiece is welded, and after welding, the workpiece istaken out. Within a short period of time, the weak-atmosphere environment applicable to laser welding is achieved, the traditional mode of achieving laser welding environment through vacuumizing is changed, the vacuumizing time is shortened, and the welding efficiency is improved. Gas circular purification under the weak atmosphere environment is achieved, dust removal and purification are performed on smoke and dust inside the working cabin in time, and long-time operation and high-quality welding in the laser welding process are ensured.

Description

technical field [0001] The invention relates to the field of laser welding, in particular to a laser welding device and method in a weak atmosphere environment. Background technique [0002] Compared with traditional welding methods, laser welding has the advantages of high degree of automation, uniform and beautiful weld seam, and small deformation of workpiece after welding. In the process of laser welding of metal materials, it is often necessary to use protective gas to avoid oxidation of materials at high temperatures (such as using inert gas protection, etc.), but it is difficult to protect parts with complex shapes in all directions, and vacuum laser welding technology can Avoid high-temperature oxidation of metal materials, and effectively suppress the plasma plume in the welding process, so that the welding penetration is significantly improved, and defects such as weld formation and pores are improved. However, in order to achieve the environment of vacuum laser w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/12B23K26/21B23K26/70
CPCB23K26/1224B23K26/12B23K26/21B23K26/702
Inventor 陈超李方志王慧洋何崇文郑增超万楚豪杨付飞
Owner 武汉光谷航天三江激光产业技术研究院有限公司
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