Papers by Author: Xing Shan Li

Abstract: In order to improve the grinding performance of end face grinding wheel, the ordered theory is applied to the design of grinding wheel. Based on the track equation of the end grinding, the effects of grinding parameters on the surface roughness are studied and compared with the workpiece appearance by grinding wheel with different abrasive patterns. The simulation results show that the surface roughness values are lower by the grinding wheel with phyllotactic pattern than other patterns. It will provide theoretical basis for designing abrasive ordered pattern of grinding wheel.

Abstract: In order to improve the performance of end face grinding wheel, the phyllotaxis theory is introduced into the design of the wheel. Meanwhile the movement track equation of the end grinding is established, and the effects of the phyllotactic coefficient on the grinding surface roughness are studied. The simulation results show that the lower surface roughness values can be obtained when choosing reasonable phyllotactic coefficient. It will provide theoretical basis for the ordered abrasive patterns of the end grinding wheel.

Abstract: This paper proposes a novel three degrees of freedom parallel machine tool. The parallel machine tool consists of three serial chains and a fixed base and a moving platform which can be moved in a pose space corresponding to the three degrees of freedom. By using matrix methods, a error model of the parallel machine was developed. The explicit solution of the error of joint and the stroke error of telescopic link were solved for analysis of influence factors of error on the position of moving platform. It provided a theoretical foundation for error compensation of parallel machine tool.

Abstract: This paper proposes an optimization method which makes the structural parameters are minimum and the workspace is maximum based on 3-DOF parallel machine tool. By analysis the conditions of boundary, parameters optimization model is built and gives out the explicit solution of dexterous workspace. Analysis the effect of structural parameters on workspace. The results show the workspace is a unsingularity space.

Abstract: This paper proposes a new 2PTT-TPT parallel machine tool, solves the kinematics equation and analyzes the actuating force and maneuverability. In order to simulate the movement trajectory and pose, the model of virtual prototype is built in Solidworks and visualNastran. As a result, the mechanism is featured by compact construction, no singularity and good maneuverability, which provides the theoretical foundation for the design of parallel machine tool.