Laser powder feeding repair atmosphere protection device

Abstract

The invention belongs to the field of additive manufacturing, and particularly discloses a laser powder feeding repair atmosphere protection device. The laser powder feeding repair atmosphere protection device comprises a laser cladding head and a protection gas box body, wherein the laser cladding head is installed in the protection gas box body, and the posture of the laser cladding head is adjustable; a detachable sealing piece is arranged at the lower end of the protection gas box body, and the detachable sealing piece comprises a sealing box cover and a flexible protection cover; when the space in the protection gas box body is enough to contain a to-be-repaired part, the to-be-repaired part is fixed in the protection gas box body and is sealed through the sealing box cover; and when the space in the protection gas box body cannot contain the to-be-repaired part, the to-be-repaired part is placed at the lower end of the protection gas box body and is sealed through the flexible protection cover. According to the laser powder feeding repair atmosphere protection device, through the detachable sealing piece and the laser cladding head capable of flexibly moving, the device can meet damage repair requirements of parts with different sizes under gas protection, and special damaged parts can be repaired.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a laser powder feeding repair atmosphere protection device. Background technique [0002] Some heavy-duty parts, such as aircraft landing gear, etc., are subjected to extremely high working stress during work and are easily damaged, such as surface scratches, cracks, plastic deformation, etc. This damage will seriously affect the service life of the parts. The damaged roll is repaired by means of powder feeding repair. [0003] Some metals, such as aluminum alloy, are easily oxidized in the air, and an oxide film is formed on the surface. The molten pool sinks, forming inclusions or pores on the interface, which affects the cladding quality. When these metals are used as materials for laser powder repair, the repair work needs to be carried out in a protective gas atmosphere, so as to minimize or even avoid the oxidation of the material during the repair pr...

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Problems solved by technology

[0005] Patent CN111850548A discloses a laser repair method for damaged parts. The laser repair method repairs the damaged roll through a laser repair device. The device is composed of a rotatable chuck, a moving mechanism, a laser and other parts, and the design of the device is reasonable , easy to operate, and reliable in positioning; its shortcoming is that the laser and the feeder are always in a vertical state in this device, that is, the angle of the laser is not variable, and it is difficult to repair the damaged part of the special position on the part, and the method’s The repair process is carried out in the air, and there is oxidation during the laser cladding process

[0006] Patent CN111850549A discloses a metal powder laser repair device and its repair method. The device drives the laser parts to move freely in three-dimensional space through a moving device capable of moving in three directions in a gas shield with a certain volume, and precisely positions them. ; Its shortcoming is: laser and feeder are in vertical state all the time in this device, promptly the angle of laser is invariable, there is the difficult situation of repairing the damaged part on the special position on the part, in addition, the gas shield volume of this device is Limited, only a certain volume of parts can be repaired, large zeros cannot be placed in a gas shield

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