TOOL FOR WORKING HOLES BY PLASTIC DEFORMATION

摘要

TOOL FOR WORKING HOLES BY PLASTIC DEFOMATION Disclosure is made of a tool comprising a head mounted in a holder journal and supporting deforming elements. According to the invention, the head is mounted for rotation about an axis inclined with respect to the holder axis while the deforming elements are made such that their working surfaces lie in an imaginary sphere. The herein disclosed tool is designed for working holes by way of plastic deformation and can be used most advantageously for finishing deep holes (at 1/d>10) and for working holes with a surface roughness Ra<0.16-1.25 .mu.. The present invention helps reduce the tool wear and provides a possibility of simultaneously rolling holes and smoothing their surfaces.