GEAR FOR REPEAT THREAD ROLLING Russian patent published in 1996 - IPC

FIELD: plastic metal working. SUBSTANCE: gear for repeat thread rolling belongs to equipment meant for thread running after thermal treatment, hole drilling for cotter pins and other operations. Gear includes mechanism feeding parts, separator, thread-rolling rollers with loading, intake, calibration and discrete sections. Separate is provided with spring-loaded rests for axial movement of parts. Thread-rolling rollers are manufactured in the form of multistart screw. Value of calibration section of it amounts to not less than two circumferences over medium diameter of repeat-rolled thread. Angle of intake section is within interval of 15-25 deg and is equal to angle of discharge section. Angle of loading section is bigger than angle between loading grooves of separator. Loading section is below calibration section by 0.5-0.8 height of head of profile of thread-rolling roller. EFFECT: enhanced functional efficiency. 3 dwg