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

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. 本发明公开了一种基于激光熔覆焊接的采煤机行星架的修复方法，该方法包括：一、激光熔覆焊接的焊前处理；二、圆柱段连接轴的