Performance analysis of and test research on decommissioned milling machine spindle after repair

Abstract

After laser cladding the spindle of the decommissioned milling machine, the surface is sprayed with nickel-based alloy powder suitable for its working hardness. After the repair, the surface microstructure is observed, with the surface hardness, residual stress, friction and wear properties tested. It is found that the repair not only improved the surface hardness but also made up for the defects of the previous external dimensional wear, and that after annealing the surface residual stress is reduced in turn. But as the depth of the thin layer increases, the overall residual stress value becomes larger. From the detection of wear scar shape, depth and area, it can be seen that under different loads, the wear time is different, the depth of the wear scar is different, and the depth of the wear scar changes as the load increases and the wear time becomes longer; but the wear depth is in the micron range. This proves that the overall performance of the remanufactured machine tool shaft parts has been improved compared to the performance of the new product, and can be used as a new product.