Verbindungsstruktur eines Ventilsitzringes und dessen Herstellungsverfahren

摘要

A bonding structure of a valve seat has a port opening of a metallic head and an annular metallic valve seat insert. The valve seat insert includes an outer reduced diameter surface on its outer circumference. The material of the valve seat insert is harder than that of the head. The head plastically deforms upon pressing the valve seat insert toward the head. The deformed metal occupies any gap around the outer reduced diameter surface.