| 摘要 |
Process for manufacturing a cylinder head gasket with a gasket plate which comprises several sheet metal layers and with a metallic spacer ring which surrounds a combustion chamber through-opening of the cylinder head gasket and is welded by a ring-shaped weld seam to one of the sheet metal layers; to improve the sealing ability of the cylinder head gasket around the combustion chamber through-opening and to shorten the welding time, the spacer ring is secured in a gas-tight manner by electric pulse welding to the sheet metal layer carrying it by a continuous, ring-shaped, uniform weld seam closed within itself by the spacer ring and the sheet metal layer being clamped between a first electrode resting against the spacer ring and a second electrode resting against the sheet metal layer and a current pulse being passed through a ring-shaped, sharp edge-like or bead-like contact projection of the one electrode pressed against one of the parts to be welded to one another, through the parts to be welded to one another, and through the other electrode. A cylinder head gasket manufactured in this way has on the free side of the spacer ring and/or the sheet metal layer carrying it a ring-shaped, groove-like depression.
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