Development of two-axis control index table driven by direct drive motors

Abstract

The stability and reliability of a tilting index table should be considered at the design stage. A design method for the lightweight and improvement of the stability of the structure in a tilting index table was proposed using a commercial analysis program, ANSYS Workbench 12, by analyzing the static-thermal characteristics of the developed high-accuracy tilting index table at its design stage. The results of the performed structural analysis show that the maximum stress is generated at the stock tail part. An optimum design for the stock tail part was carried out to reduce the maximum stress and deformation. Also, the design variables were determined by considering the support of the stock tail part for the C-axis body. In the comparison of the results before and after the optimization, the maximum deformation and stress are improved by 2.8% and 8%, respectively.

Keywords

tilting index table / structural analysis / modal analysis / thermal analysis / optimum design

References

[1] MingL., BaohaiW., DinghuaL., ShanL., YingZ.. An efficient method for five-axis spiral NC machining of blade parts [J]. Journal of Mechanical Science and Technology, 2008, 27(7): 917-921

[2] HeoE. Y., KimD. W., KimB. H., JangD. K., ChenF. F.. Efficient rough-cut plan for machining an impeller with a 5-axis NC machine [J]. Journal of Computer Integrated Manufacturing, 2008, 21(8): 971-983

[3] KishwayH. A., BeczeC. E., MclntoshD. G.. Tool performance and attainable surface quality during the machining of aerospace alloys using self-propelled rotary tools [J]. Journal of Materials Processing Technology, 2004, 152(3): 266-271

[4] ChoiB. K., KoK.. C-space based CAPP algorithm for freedom die-cavity machining [J]. Journal of Computer Aided Design, 2003, 35(2): 179-189

[5] ParkS. R., HoangT. K., YangS. H.. A new optical measurement system for determining the geometrical errors of rotary axis of a 5-axis miniaturized machine tool [J]. Journal of Mechanical Science and Technology, 2010, 24(1): 175-179

[6] LeeJ. H., LiuY., YangS. H.. Accuracy improvement of miniaturized machine tool: Geometric error modeling and compensation [J]. International Journal of Machine Tools & Manufacture, 2006, 46(12): 1508-1516

[7] JungH. C., HwangJ. D., ParkK. B., JungY. G.. Development of practical postprocessor for 5-axis machine tool with non-orthogonal rotary axes [J]. Journal of Central South University of Technology, 2011, 18(1): 159-164

[8] SorbyK.. Inverse kinematics of five-axis machines near singular configurations [J]. International Journal of Machine Tools & Manufacture, 2007, 47(2): 299-306

[9] DAEGU Machinery Institute of Components & Materials Foundation. Development of high-speed and intelligent machine tools used for cutting mold [R]. The Ministry of Knowledge Economy, 2008: 1–4.

[10] CHOI U D, High accuracy CNC index table development [M]. Sung Rim Co. Ltd., 2001: 1–9.

[11] LeeM. J., LeeC. M.. A study on structural analysis and optimum shape design of tilting index table [J]. Journal of Korean Society Precision Engineering, 2009, 27(2): 86-93

[12] KimM. S., KimS. R.. Topology of a PCB substrate considering mechanical constraints and heat conductivity [J]. Journal of Mechanical Science and Technology, 2007, 21(12): 2041-2047

[13] KimH. S., KeeY. S.. Optimization design technique for reduction of sloshing by evolutionary methods [J]. Journal of Mechanical Science and Technology, 2008, 22(1): 25-33