| 摘要 |
<p>PCT No. PCT/DE95/01315 Sec. 371 Date Dec. 11, 1996 Sec. 102(e) Date Dec. 11, 1996 PCT Filed Sep. 21, 1995 PCT Pub. No. WO96/16762 PCT Pub. Date Jun. 6, 1996A precision drill for drilling noncircular bores, comprising a drill bit on a shaft and a holder for the workpiece being drilled, for providing a drill that can operate economically at high speeds. The workpiece holder oscillates translationally in at least one direction at a frequency controlled by the speed of the drill bit, and moves along a path determined by the desired shape of the bore to be drilled.</p> |
