| 摘要 |
PURPOSE:To enable work to be carried out up to finish machining in a single work stage on a turning broach machine for machining a crankshaft by feeding a movable cutter stand with a broaching tool in a slant direction along a guide stand having an intermediate inclined portion. CONSTITUTION:In machining pins P1 and P4 for a crankshaft 'W', two cutter stands 15 are aligned and fixed on a slide table 12, the workpiece 'W' is retained between main shaft devices 7 and 8 via support members 18 and 19, and rotary drive devices 9 and 10 are made to give synchronized rotation. And the slide table 12 of the cutter stands 15 fitted with a broaching tool 14 is feed actuated in a slant direction on a guide stand 11 positioned aslant via a drive device 13, thereby effectuating a turning broaching process. In this case, chips are cut into small pieces by each tooth of the broaching tool 14 and machining heat due to chips is rapidly removed, thereby enabling the finish of a process from initial rough machining to finish machining in a single work stage.
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