ErrorAnalysisofaSerial–ParallelTypeMachineTool(串并联机床误差分析).pdfVIP

Int J Adv Manuf Technol (2002) 19:174–179  2002 Springer-Verlag London Limited Error Analysis of a Serial–Parallel Type Machine Tool 2 1 3 2 J.-W. Zhao , K.-C. Fan , T.-H. Chang and Z. Li 1Department of Mechanical Engineering, National Taiwan University, Taiwan; 2School of Mechanical Engineering, Huazhong University of Science and Technology, Wuhan, China; and 3Mechanical Industry Research Lab, ITRI, Taiwan In order to evaluate the accuracy of a serial–parallel type platform. However, very few publications have dealt with the machine tool, an error analysis is presented. Two different verification of error modelling methods for parallel machine methods are adopted to derive the error model, namely the tool structures. linkage kinematic analysis and the differential vector method, The machine tool studied is called a serial–parallel machine by which the effects of strut manufacturing tolerance and tool. It consists of serial units (X–Y table, column and slider) actuating error on the tool position and pose are investigated. and a parallel shaft platform. In this study, the error model The computational results show the influences of the actuating was derived using two methods, namely linkage kinematic error and the strut length error on the machine tool inaccur- error analysis and the differential vector method. The agreement acies. of final forms is verified. Computational examples indicate some major factors contributin