Thread-rolling tool
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United States of America Patent
Stats
-
Feb 12, 1985
Grant Date -
N/A
app pub date -
Feb 23, 1982
filing date -
Jun 30, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thread-rolling tool having a body provided with thread rollers uniformly disposed along the circumference thereof, the axes of the rollers being in angular position relative to the axis of rotation of the body and at an angle equal to the lead angle of the helical line of the thread being rolled. The body includes groove-forming rollers having a pitch equal to that of the thread rollers and being disposed at an angle relative to the axis of rotation of the body and at an angle relative to the latter. The top portions of the thread of the groove-forming roller being disposed with an axial displacement relative to the top portions of the thread of a preceding thread roller, when viewed in the projection on a plane normal to the axis of rotation of the body 1, the amount of said displacement being: (P/2)-(P.beta./360.degree.) where P is a pitch of the thread being rolled. .beta. is an angle between the axes of rotation of the groove-forming and preceding thread rollers if viewed in the projection on a plane normal to the axis of rotation of the body.
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