| 摘要 |
A broaching device and method for enlarging an opening, hollow or cavity in a workpiece (30) comprises a broaching tool (28) which is mounted on, or formed on, either the shaft (12) or the nut (14) of a ballscrew drive unit (10), the other component being rotationally fixed. The workpiece (30) is held in a lathe chuck (34) and rotates in contact with the broach (28) which is caused to advance by the ballscrew. <IMAGE> |
