Error Analysis of Ladder Shaft Turning and the Research of NC Compensation

To reduce the ladder axis machining error, in this paper, the finish turning of a machine tool spindle and the rough turning process is analyzed, were calculated the change of step-axis contour deformation in the process of the finish turning and rough turning with limited difference method and the finite element method (the elastic constraint and inelastic constraint in both ends ). Comparison of the deformation of the three profile, to find more realistic results, and simulate the spline of shaft ladder deformation, using Compensation method to process NC programming. To improve the processing quality of stepped shaft.