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Plasma suppression method for high-power laser welding

A technology of laser welding and plasma, which is applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems that affect the service life of welding quality equipment, achieve the goals of reducing plasma clusters, stable and good welding, and improving work efficiency Effect

Pending Publication Date: 2020-08-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-power laser welding plasma suppression method to solve the problem that the existence of high-temperature plasma clusters seriously affects the welding quality and equipment service life during high-power laser welding

Method used

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  • Plasma suppression method for high-power laser welding
  • Plasma suppression method for high-power laser welding
  • Plasma suppression method for high-power laser welding

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Experimental program
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Effect test

Embodiment 1

[0016] A high-power laser welding plasma suppression method, a controller 4, the upper end of the controller is respectively connected with the laser generator 5, the air injection device A1, the air injection device B2, and the suction device 3, and the air injection device A is connected along the laser The gas is injected in the direction of beam conduction, and is coaxial or paraxial with the laser beam. The welding process continuously provides shielding gas. The gas injection device B is arranged laterally to the plasma cluster, and the gas is injected laterally. The suction The gas device is distributed on the opposite side of the gas injection device B, and is mainly used to absorb plasma clusters.

Embodiment 2

[0018] According to the high-power laser welding plasma suppression method described in embodiment 1, the controller adjusts the gas flow in real time according to the size of the laser power and the material of the welding workpiece, the injection gas is an inert gas, the higher the laser power, the higher the injection gas And the higher the flow rate of the absorbing gas, the plasma clusters generated by welding will be reduced or deviated from the laser transmission path, reducing the impact on laser energy and achieving stable welding.

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Abstract

The invention discloses a plasma suppression method for high-power laser welding. In existing laser welding, a high-temperature plasma cluster reversely jetted from the welding position of a plate exists in the light path transmission direction, the cluster can cause a thermal lens effect to affect the focusing position of a laser beam and the energy density of the laser beam, a laser protection lens is stained, and the welding quality and the service life are affected. The component of the laser welding plasma suppression method comprises a controller (4), the upper end of the controller is connected with a laser generator (5), an air injection device A (1), an air injection device B (2) and an air suction device (3), the air injection device A injects air in the laser beam conduction direction and is coaxial or paraxial with the laser beam, protective gas is continuously provided in the welding process, the air injection device B is arranged in the lateral direction of the plasma cluster, gas is injected in the lateral direction, and the air suction device is distributed on the opposite side of the air injection device B and is mainly used for absorbing the plasma cluster. The method is used for the plasma suppression method for high-power laser welding.

Description

Technical field: [0001] The invention relates to the technical field of laser welding, in particular to a high-power laser welding plasma suppression method. Background technique: [0002] In the process of high-power laser welding of metal materials in the prior art, there are high-temperature plasma clusters ejected reversely from the welding position of the plate along the transmission direction of the optical path. The higher the power, the more obvious the plasma clusters, and the existence of the plasma clusters It will cause thermal lens effect and affect the focus position and beam energy density of the laser beam, thereby affecting the welding penetration. Furthermore, the plasma cluster will cause the laser protection lens to be defaced, affect the light transmittance, cause the gun body to heat up, and affect the welding quality and equipment lifespan. [0003] Laser welding has outstanding advantages such as fast welding speed, high joint quality, small welding ...

Claims

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Application Information

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IPC IPC(8): B23K26/12B23K26/14B23K26/142B23K26/70
CPCB23K26/702B23K26/14B23K26/142B23K26/12
Inventor 徐娜韩春花张玮王玉乔孙海阳
Owner TAIYUAN UNIV OF TECH
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