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.