METHOD OF MAKING A CAST IRON SEALING RING

摘要

A method of providing a cold-worked sealing surface on the annular face of an annular seal ring is disclosed. The seal ring is mounted in a rotatable holder with the annular face exposed. While the holder is rotated, a work tool with a plurality of shot-impregnated flaps is also rotated. The axis of rotation of the work tool and holder are displaced 90 DEG . During rotation, the holder and flaps are placed in interfering relationship so that the annular face is cold-worked by the shot-impregnated flaps. The opposite annular face of the seal ring can be worked in the same manner.