Repair method of coal cutter planet carrier based on laser cladding welding

Abstract

The invention discloses a repair method of a coal cutter planet carrier based on laser cladding welding. The method comprises the steps of firstly, pre-welding treatment of laser cladding welding, secondly, laser cladding welding of the outer circle face of a cylinder segment connecting shaft, thirdly, laser cladding welding of concave pits located at the tail ends of multiple spline teeth and fourthly, post-welding treatment of laser cladding welding. The process of the repair method is simple, in the process of repairing the planet carrier through laser cladding welding, the planet carrier can be prevented from generating heat deformation and heat fatigue damage, and meanwhile the bonding strength of a cladding layer and a matrix material is high; and secondary damage can be prevented from being generated to an outer spline of the planet carrier, the repair precision is high, the repair cost is low, and application and popularization are convenient.

Description

technical field [0001] The invention belongs to the technical field of laser cladding welding, and in particular relates to a method for repairing a planetary frame of a coal mining machine based on laser cladding welding. Background technique [0002] The working conditions of the shearer are poor, the use intensity is high, and the damage forms are diverse. The external parts of the shearer are mostly worn, corroded, deformed, and broken, and the internal parts are mostly out of tolerance. Heavy loads will cause cracks in the planetary frame of the shearer. For the maintenance of the shearer, a combination of multiple repair schemes is required. For the size of the built-in parts that are out of tolerance, the traditional repair methods mostly use argon arc welding, brush plating, Thermal spraying, etc. For the wear, corrosion, deformation and fracture of external parts, the traditional repair method mostly adopts the method of gas shielded welding and surfacing welding, e...

AI Technical Summary

Problems solved by technology

[0002] The working conditions of the shearer are poor, the use intensity is high, and the damage forms are diverse. The external parts of the shearer are mostly worn, corroded, deformed, and broken, and the internal parts are mostly out of tolerance. Heavy loads will cause cracks in the planetary frame of the shearer. For the maintenance of the shearer, a combination of multiple repair schemes is required. For the size of the built-in parts that are out of tolerance, the traditional repair methods mostly use argon arc welding, brush plating, Thermal spraying, etc. For the wear, corrosion, deformation and fracture of external parts, the traditional repair method mostly adopts the method of gas shielded welding and surfacing welding, especially for planetary carriers, shaft gears, water jackets, picks and other parts, it is necessary to ensure repair The size of the final part must ensure the strength of the repaired part, but the traditional repair method does not meet the requirements, and there are defects such as large thermal deformation and low strength; therefore, a repair of the planetary frame of the coal mining machine based on laser cladding welding should be provided method

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