TY - JOUR
T1 - Modeling and measurement of active parameters and workpiece home position of a multi-axis machine tool
AU - Lin, Psang Dain
AU - Tzeng, Chian Sheng
N1 - Funding Information:
The authors are thankful to the National Science Council of Taiwan for supporting this research under grant NSC 95-2221-E-006-272. Sincere thanks to the president, S.C. Hwang, and general managers, Randy Kuo and Z.M. Hwang, of Di Ku Diamond Enterprises Co., Ltd., who provided the Ewag six-axis tool-grinding machine and their valuable suggestions.
PY - 2008/3
Y1 - 2008/3
N2 - The complex structures of a multi-axis machine tool may produce inaccuracies at the tool tip caused by dimensional errors in the machine's link parameters. This paper addresses two important issues for precision machining: (1) which link parameters (denoted as active parameters) of a machine tool can affect the machining accuracy of a workpiece and (2) how to measure the active parameters by using a grinding wheel as a measuring probe. To achieve this, a modified Denavit-Hartenberg (D-H) notation is introduced to model a multi-axis machine tool. The NC data equations are then derived in terms of the machine's link parameters. It is found that the link parameters of a machine tool can be divided into two types: active and nonactive parameters. The prerequisite for obtaining an accurately machined workpiece is to have correct values of the active parameters and the workpiece home position. Based on the developed NC data equations of a multi-axis machine tool, this paper also addresses the technique of using a grinding wheel as a measuring probe to determine the active parameters and the workpiece home position. Experimental results are also given with illustrative examples.
AB - The complex structures of a multi-axis machine tool may produce inaccuracies at the tool tip caused by dimensional errors in the machine's link parameters. This paper addresses two important issues for precision machining: (1) which link parameters (denoted as active parameters) of a machine tool can affect the machining accuracy of a workpiece and (2) how to measure the active parameters by using a grinding wheel as a measuring probe. To achieve this, a modified Denavit-Hartenberg (D-H) notation is introduced to model a multi-axis machine tool. The NC data equations are then derived in terms of the machine's link parameters. It is found that the link parameters of a machine tool can be divided into two types: active and nonactive parameters. The prerequisite for obtaining an accurately machined workpiece is to have correct values of the active parameters and the workpiece home position. Based on the developed NC data equations of a multi-axis machine tool, this paper also addresses the technique of using a grinding wheel as a measuring probe to determine the active parameters and the workpiece home position. Experimental results are also given with illustrative examples.
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U2 - 10.1016/j.ijmachtools.2007.10.004
DO - 10.1016/j.ijmachtools.2007.10.004
M3 - Article
AN - SCOPUS:37549045273
SN - 0890-6955
VL - 48
SP - 338
EP - 349
JO - International Journal of Machine Tools and Manufacture
JF - International Journal of Machine Tools and Manufacture
IS - 3-4
ER -