A laser welding gas protection device, laser welding equipment and application method

Abstract

The invention is applied to the technical field of laser welding, and discloses a laser welding gas protection device, laser welding equipment and an application method. A device body is provided withan inner ring hole used for lasers to pass through, first gas blowing holes used for blowing gas obliquely upward are arranged in the inner ring hole of the device body, second gas blowing holes usedfor blowing gas obliquely downward and third gas blowing holes used for blowing gas to the lower part are formed in the bottom of the inner ring hole, and the device body is provided with a first gasinlet communicating with the first gas blowing holes and a second gas inlet communicating with the second gas blowing holes and the third gas blowing holes. A cooling cavity used for accommodating cooling liquid is arranged in the device body. The laser welding equipment comprises the laser welding gas protection device. According to the laser welding gas protection device, the laser welding equipment and the application method, damage to the laser welding gas protection device due to high temperature is avoided, the service life and the maintenance period of the equipment are beneficially prolonged, and the reliability is good.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to a laser welding gas protection device, laser welding equipment and an application method. Background technique [0002] Gas protection is an important factor affecting the quality of laser welding. Laser welding generally uses side blowing protection devices, and the most commonly used is single-tube side blowing devices. However, side blowing protection is directional and cannot fully protect the weld from oxidation. . When the coaxial blowing protection method is used to blow air, the protective air flow is coaxial with the laser beam, and there is no direction selection for blowing, which can reduce the constraints of the blowing direction on the welding posture, especially in the case of three-dimensional welding, the coaxial blowing method More flexible and convenient. [0003] During the laser welding process, the surface of the workpiece is prone to gen...

AI Technical Summary

Problems solved by technology

In addition, under the direct laser irradiation and the radiation of the molten pool, the plasma / metal vapor cloud above the molten pool has a central temperature as high as 5000 K, forming a gradient field with a higher temperature in the upper surface space of the molten pool, and the spatter of the molten pool also carries There is a lot of heat energy, these end up causing the blown protection to be very easily damaged by the heat

[0004] CN 105772942A During the welding process of workpieces to be welded, air can be excluded to prevent the air from getting involved in the weld seam to cause oxidation, and the weld seam can be protected for a time delay, but it does not solve the problem that the blowing protection device is easily damaged by high temperature

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