METHOD OF MANDRELLING AT MANDREL STATIC-&-PULSE LOADING Russian patent published in 2013 - IPC B24B39/02 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to mandrelling. Static and pulse loads are applied to mandrel. Mandrel with stiff forming element and elastic forming element arranged there before is used. Elastic forming element gets in contact with damper hollow rod and, at intermittent pulse load at mandrel, gets braked by said damper. Said elastic forming element represents helical taper spring made from wire with outer working surface composed of two truncated cones facing each other by their larger bases. Epilam layer is applied on working surface of forming elements.

EFFECT: expanded machining performances, higher efficiency.

6 dwg, 1 ex