| 摘要 |
PROBLEM TO BE SOLVED: To ensure satisfactory hole accuracy even in case of continuously machining a hole using a cantilever-supported long tool. SOLUTION: A workpiece 1 is lifted by a clamper 8, and the upper face of the workpiece 1 is pressed to a reference block 9 and a stopper 16 to elastically deform the workpiece 1 following the tip moving locus A of a long tool. In this state, the long tool is axially moved while rotating it to machine a hole. Clamping force is then released to put the workpiece back into its original shape, and the machined hole is linearly corrected according to the return of the shape.
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