Laser cladding device and method for repairing rolling mill housing

Abstract

The invention discloses a laser cladding device for repairing a rolling mill housing. The device comprises a laser cladding unit and a gantry type linear module, the laser cladding unit comprises a laser emitter, a laser cladding processing head and a powder feeder; the laser emitter is connected with an output optical connector of the laser cladding processing head through a transmission opticalfiber. The laser cladding processing head is used for emitting laser emitted by the laser emitter through the laser cladding processing head. The powder feeder is connected with a powder feeding channel of the laser cladding processing head through a powder feeding pipe and used for conveying cladding powder into a molten pool of a light spot irradiation area to achieve laser cladding processing during laser irradiation. The laser cladding processing head is mounted on the linear module; the linear module is fixed to a to-be-repaired area on the rolling mill housing, the laser cladding machining head is made to right face the to-be-repaired area on the rolling mill housing, and the linear module drives the laser cladding processing head to linearly move in multiple directions relative to the surface of the rolling mill housing so as to adjust the position of the laser cladding processing head relative to the to-be-repaired area of the rolling mill housing.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser cladding device and method for repairing a rolling mill archway. Background technique [0002] The rolling mill archway, also known as the rolling mill frame and the frame body, is an overall frame structure, which mainly plays a supporting and fixing role in the rolling mill, and is an important part of the hot rolling, cold rolling, continuous rolling and other rolling mills. The rolling mill archway is the part with the largest size and weight in the working stand of the rolling mill. It is mainly composed of columns and beams with thick cross-sections. The whole set of rolls and roll adjustment devices are installed on it. The stand must bear all the rolling force during rolling. And the huge impact load when biting into the billet, and the stand is a permanent part of the rolling mill, so it has high requirements for its strength. [0003] During the workin...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages: Since the nature of the surface of the rolling mill archway has not been changed, it has not played a strengthening role, so after a period of use, it needs to be repaired again

[0011] Disadvantages: short service life, frequent replacement, high labor intensity

[0014] Disadvantages: The heat input of surfacing welding is large, which may cause the problem of deformation of the size of the rolling mill archway, and it is prone to welding defects and it is difficult to obtain a uniform and dense surfacing layer

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