BUILTUP ROLLER FOR KNURLING PRELIMINARILY CUT THREAD Russian patent published in 2005 - IPC

FIELD: machine engineering, namely manufacture of tools for forming threads by plastic deforming, for example knurling threads by means of rollers.

SUBSTANCE: roller for knurling preliminarily cut thread is built-up one and it has three portions, namely: two supporting portions and deforming portion arranged between supporting ones. Roller includes adjusting ring whose thickness is equal to thickness difference of deforming and supporting turns. Said ring may be mounted between one supporting portion and deforming portion, namely at knurling left side of thread profile of blank ring is mounted on the right from deforming portion and at knurling right side of thread profile of blank it is mounted on the left from deforming portion. Such roller provides efficiency of knurling process increased by 1.8 -2 times, strength of tool increased by 2.5 -3 times, height of roughness of threaded surface lowered by 1 - 2 classes, cost price of tool reduced by 2 times.

EFFECT: improved properties of knurling roller, enhanced efficiency of knurling process.

2 dwg, 1 ex