METHOD FOR MANUFACTURING METALLIC GASKET FOR CYLINDER HEAD, AND METALLIC GASKET FOR CYLINDER HEAD

摘要

Provided is a metal gasket for a cylinder head that is capable of improving engaging force between a substrate and a step adjustment plate. A method for manufacturing the metal gasket for a cylinder head includes the steps of: forming a bottom hole 3c in each of a plurality of protruding pieces 3b of the step adjustment plate 3; forming a tubular portion 3d including a plurality of projecting segments 3d 1 by inserting a die 4 including a polygonal pyramidal punch 4a into the bottom hole 3c so as to bend up a peripheral portion around the bottom hole 3c while cutting the peripheral portion into segments; forming in the substrate 2 an engagement hole 2h in correspondence with a position of the tubular portion 3d formed in the step adjustment plate 3; and engaging the protruding piece 3b through the substrate 2 by inserting the tubular portion 3d of the step adjustment plate 3 through the corresponding engagement hole 2h formed in the substrate 2, and subsequently folding the plurality of projecting segments 3d 1 of the tubular portion 3d over to an outside of the substrate 2 and flattening out the projecting segments 3d 1 .