Patent ID: 9662728
Date: 2017-05-30
CPC Classifications: B23G,F16B,Y10T

Claim:
1. A method for producing a thread in a workpiece, said method comprising the following method steps: a) generating a number n≧1 of twisted grooves in a wall of the workpiece encircling a thread axis, b) respectively inserting a thread generating region of a tool which is twisted to match the twisting of the twisted grooves into each of the twisted grooves in a twisted insertion movement matched to the twisting of the associated groove, c) generating a thread in each wall sub-region, adjoining the grooves, of the wall of the workpiece by rotating the tool about the thread axis and with a simultaneous axial feed motion of the tool coaxially with respect to the thread axis with an axial feed speed adapted to the rotational speed of the rotational movement and to the thread pitch, wherein, during the rotation and the simultaneous axial feed movement, each thread generating region engages into the associated wall sub-region and generates an associated part of a thread flight, and after the rotation projects into the same groove again or into another groove in the wall, d) wherein the grooves and the thread are generated using a single tool, e) the tool, for this purpose having additionally at least one twisted groove generating region in addition to the at least one twisted thread generating regions, each groove generating region and each thread generating region have the same twisting both in the direction in which they turn about the thread axis or tool axis and in the twist pitch or in the twist angle, f) wherein either exclusively the groove generating regions generates or generate the grooves or else the thread generating regions additionally reworks or rework or also generates or also generate the grooves generated by the groove generating regions, g) moving each thread generating region of the tool out of the associated groove in a twisted removal movement matched to the twisting of the associated twisted groove.