Papers by Author: L. Shi

Abstract: Orthogonal experiments of milling titanium alloy TA12 were done on the lifting workbench milling machine. The milling force signals were acquired through PIC-1712 Data Acquired Board. The main frequencies and energy distribution were got through analysis in SPTOOL of MATLAB. The signals were decomposed and reconstructed based on the main frequency of the milling force with wavelet toolbox. The influence of the milling velocity, axial depth of cut and radial depth of cut on the component milling force was got through range analysis. Through analyzing known that three factors had different influence on the component milling force.

Abstract: A novel precision grinding technique optimum is proposed for grinding workpiece’s convex surface. The grinding point moves in radial direction on wheel’s planar face, while the grinding wheel feed in forward and backward direction. The calculation model of cutting location is established, experiments and data are shown. The advantages are illustrated by achieved higher precision grinding, extended life span of wheel, reduced deformation of machining system, and easier dressed following dullness. Via comparing the machining error to conventional methods, it is suggested that technique is an optimum option, in particular, for grinding convex surface of workpiece made of brittle and hard materials.