B - Operations – Transporting – 21 – K
Patent
B - Operations, Transporting
21
K
B21K 25/00 (2006.01) B21D 39/03 (2006.01) B21J 13/00 (2006.01)
Patent
CA 2108929
A method and a tool set for joining superposed metal sheets are disclosed. In a first step, a preferably ring-shaped free space is provided by dislocating material of at least one sheet. Thereafter, material of all sheets is squeezed within the confines of the free space whereby material flows laterally into the free space producing an interengaging form lock.
Liebig Hanns Peter
Sack Peter
Eckold Gmbh & Co. Kg.
Fetherstonhaugh & Co.
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