| 摘要 |
PCT No. PCT/SU80/00117 Sec. 371 Date Feb. 23, 1982 Sec. 102(e) Date Feb. 23, 1982 PCT Filed Jun. 30, 1980 PCT Pub. No. WO82/00109 PCT Pub. Date Jan. 21, 1982.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 DEG ) 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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