| 摘要 |
PROBLEM TO BE SOLVED: To compensate an instrumental error in a measuring instrument acting as a pivot and one in an on-machine shape measuring instrument without preparing prototypes the number of which corresponds to that of kinds of shapes of objects under measurement or without performing measurement for correction each time a shape differs. SOLUTION: An on-machine shape-measuring method comprises: a process for measuring a prototype 17 under measurement, which is an object under measurement with a surface shape definable by an arbitrary design expression, with the external shape measuring instrument 12 acting as a pivot to clarify its shape; a process for measuring the prototype 17 with a shape measuring instrument 3 installed on a lathe 1 for ultra-precision working; a process for finding an error between the shapes clarified by the measuring instruments 12 and 3; and a process for giving a correction, based on the error, to a measurement result of the measuring instrument 3 installed on a working machine. COPYRIGHT: (C)2006,JPO&NCIPI
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