Die tapping unit
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United States of America Patent
Stats
-
Apr 15, 2003
Grant Date -
Jan 30, 2003
app pub date -
Jul 27, 2001
filing date -
Jul 27, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An in-die tapping unit for a press in which two ball screw mechanisms are driven by closing motion between two housing pieces caused by press actuation. Both ball screw mechanisms rotate a central drive gear which causes rotation and axial advance of a pitch adapter sleeve axially advanced by a threaded engagement with a fixed pitch adapter hub, the movable pitch adapter carrying a tap holder, which rotates and advances a tap inserted therein. A striker pad and acceleration spring reduces the shock loading of the unit when the press engages the upper housing piece.
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