METHOD FOR ROLLING OF EXTERNAL CONICAL THREADS Russian patent published in 2009 - IPC B21H3/02 B21H5/04 B23G7/02 

Abstract RU 2371273 C1

FIELD: technological processes.

SUBSTANCE: invention is related to technology of machine building, namely, to methods for shaping of threads by means of plastic deformation. Rotary motion and radial feed motion are imparted to conical knurl rollers, and stock is rotated by means of friction forces. Two or three identical conical knurl rollers are used with angle to cone φp, determined using formula: where kP is number of roller threading passes, kd is number of threading passes on stock, φ is angle of rolled thread cone.

EFFECT: method prevents slipping of roller turns relative to stock, and improved resistance of thread-rolling tool.

2 cl, 1 dwg, 1 ex

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RU 2 371 273 C1

Authors

Stepanov Jurij Sergeevich

Kirichek Andrej Viktorovich

Afonin Andrej Nikolaevich

Afanas'Ev Boris Ivanovich

Dolzhikov Dmitrij Aleksandrovich

Dates

2009-10-27Published

2008-10-06Filed