The remanufacturing and repair of damaged parts is an important way to recover huge economic and time losses, improve resource utilization, and achieve sustainable development of the national economy. Select alloy powder with excellent performance for laser cladding repair, analyze the macro/microstructural characteristics, hardness, and wear resistance of the laser cladding layer, and then grind the cladding layer to realize the remanufacturing of the lathe spindle

Name of repair equipment: Imported 25-meter CNC milling machine

Repair material: alloy steel (60#)

Basic repair situation: Due to the long-term excessive wear of the equipment on the inner wall of the working spindle, the inner wall of the work spindle has been worn by 0.5mm on one side, and the traditional process cannot be repaired after the wear.

Repair request

1. After grinding and repair, the radial circular runout tolerance of the spindle taper hole is: 0.01mm at the proximal end, 0.03mm at 300mm at the distal end, and the axial runout tolerance of the spindle is 0.01mm;
2. After grinding and repair, the surface roughness of the spindle taper hole should not be less than Ra0.8, and the contact area should not be less than 75% using a standard inspection rod for coloring, and the big end should be in close contact;
3. The keyway width tolerance on the end face of the spindle is 270﹢0.025mm, and the parallelism tolerance is 0.01mm.