公开(公告)号：US20030099520A1

公开(公告)日：2003-05-29

申请号：US09994305

申请日：2001-11-26

Applicant: DELPHI TECHNOLOGIES INC.

Inventor： Michael Powell

IPC: B23B035/00

CPC classification number: G05B19/182 ,  B23B35/00 ,  G05B2219/49397 ,  Y10T408/03 ,  Y10T408/17 ,  Y10T408/23

Abstract: The invention provides a drilling apparatus and method for drilling a hole in a workpiece. The drilling apparatus includes means for rotating a drill bit and means for advancing the rotating drill bit into a workpiece to a first depth. The drilling apparatus further includes means for dwelling the drill bit within the workpiece at the first depth for a dwell time and means for further advancing the rotating bit to a second depth after the dwell time has expired. The drilling method includes rotating a drill bit and advancing the rotating drill bit into the workpiece to a first depth. The method farther includes dwelling the drill bit within the workpiece at the first depth for a dwell time and further advancing the rotating bit to a second depth after the dwell time has expired.