APPARATUS FOR ABRASIVE WORKING OF SCREWS BY EMBRACING TOOL Russian patent published in 2003 - IPC

FIELD: machine engineering, possibly finishing screw surfaces of accurate screws, for example screw pump screws made of hard-to-grind materials by embracing grinding method. SUBSTANCE: apparatus includes tool in the form of tore-like elastic envelope embracing part and having abrasive layer on inner surface of tore. Elastic envelope allows to realize radial motion of abrasive layer at grinding process in order to provide uniform distribution of removed allowance. EFFECT: enhanced quality, efficiency of working high-accuracy screws due to increased contact area of tool and blank, intensified working modes of screw surfaces. 2 cl, 3 dwg