Daniel R Scott

US Patent:

54891698, Feb 6, 1996

Filed:

Jan 17, 1995

Appl. No.:

8/373015

Inventors:

Daniel G. Scott - Bolingbrook IL
Richard M. Brosig - Downers Grove IL

Assignee:

Lovejoy, Inc. - Downers Grove IL

International Classification:

B23D 3700
B23Q 306

US Classification:

409244

Abstract:

A broaching machine for cutting keyways in a bore of a piece part. There is a stationary bed plate on which is slidably mounted a moveable vise which slides along the bed plate. The jaws of the moveable vise clamp the piece part which is to be machined. A broach holder lowers the broach through an upper fixed support which has upper broach guide means disposed therein. The broach then passes through the piece part and through a lower broach guide means positioned in the bed plate. A broach pulling unit receives the bottom of the broach and reciprocates the broach in an up and down vertical cutting operation. The broach is maintained in position and alignment by means of the upper and lower broach guide means which are disposed above and below the piece part. The upper and lower broach guide means are removable and replaceable after a predetermined amount of wear has occurred. The piece part is moved into the cutting teeth of the broach a predetermined amount to remove the material from the piece part in the keyway cutting operation.