METHOD AND TOOL FOR WORKING INNER CYLINDRICAL SURFACES BY SURFACE PLASTIC DEFORMATION Russian patent published in 1994 - IPC

FIELD: plastic metal working. SUBSTANCE: workable surface is effected by deforming balls subjected to a centrifugal force and a shock pulse. The shock pulse is transferred through balls-strikers which are effected by a compressed air. The air pressure is equal to P = 0.05-5 MPa. The ball-strikers diameter exceeds the diameter of the deforming balls. While working the balls-strikers are set in axial movement relative to the deforming balls under feed S = 0.05-5 m/min. The tool has a body with the deforming balls, a mandrel with a ring chamber, balls-strikers. The mandrel is made with an axial hole and tangential channels. The deforming members are located along circular trajectories at fixed longitudinal and cross distances. Mathematical relations for determining the step of deforming balls are presented. EFFECT: improved quality. 4 cl, 9 dwg, 1 tbl