| 摘要 |
1,221,459. Broaching. COLONIAL BROACH & MACHINE CO. 19 Sept., 1968 [6 Oct., 1967], No. 44614/68. Heading B3L. In broaching external helical teeth or splines on to a band 20 of a workpiece W a ram 14 operated broaching tool 22 is mounted for rotation in a pusher 30 and is rotated during a cutting stroke by a follower arm attached to the broach tool acting with a cam 48. The broach tool 22 is held in a housing 24 by a ring part extension 40 of the cam arm, and the housing 24 is held in the pusher 30 against a thrust bearing 28 and bushing 29 by a flange ring 27. The broach tool 22 is prevented from turning in the housing 24 by a key. The workpiece W is fixed to a support post 18 and prevented from rotating by a key and keyway. |
