Abstract: Method of joining two abutting metal members together by a single reciprocating head having a first part for lancing and forming and having a second part for staking, the method comprising the steps of supporting the members in abutting relation with support structure, advancing the head toward the supported members to cause the first part to lance and form a part of one of the members through an unblanked part of the other of the members while the members are supported by the support structure in opposition to the advancing movement of the head, thereafter withdrawing the head from the members, and then advancing the head a second time toward the supported members to cause the second part to stake the lanced and formed part of the one member to the other member and thereby secure the members together while the members are supported by the support structure in opposition to the second advancing movement of the head.

Abstract: An apparatus for joining two abutting metal members together by lancing and forming a part of one member through an unblanked part of the other member and thereafter staking the lanced and formed part of the one member to an adjacent surface of the other member to secure the members together in abutting relation, the apparatus having a single reciprocating head provided with a first section that performs the lancing and forming step on a first stroke of the head and provided with a second section that performs the staking step on a second stroke thereof.