Metal deforming – Tool and/or tool holder – Tool-comprising die plate having ribs and/or grooves
Patent
1983-12-07
1986-03-18
Crane, Daniel C.
Metal deforming
Tool and/or tool holder
Tool-comprising die plate having ribs and/or grooves
72 71, 72 88, B21H 306
Patent
active
045760330
ABSTRACT:
Thread rolling dies for pointed fasteners having an improved working face contour which promotes displacement of blank material from the blank point area at an early stage in the thread rolling sequence to avoid excessive pressures in the die and blank at the finishing stages of the rolling sequence. Thread cutters include an extended section that presurfaces the rise angle of the die working face to produce uniform, improved thread profiles.
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Colt Industries Operating Corp.
Crane Daniel C.
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