METHOD AND DEVICE FOR MEASURING THE LIGHT GAP TIGHTNESS OF PISTON RINGS

摘要

The invention relates to a method for measuring the light gap tightness of a piston ring which is provided with a butt joint and has been produced in a non circular manner by tensioning the open piston ring by means of an auxiliary means in the circumferential direction while closing the butt joint to a large extent and by exerting a defined force in the region of at least one of the butt joint ends of the piston ring in the direction of a wall of the auxiliary agent. According to the invention it is determined using optical means whether the force impact region of the piston ring rests against the wall of the auxiliary agent in a light gap tight manner.