Patent ID: 8690693
Filing Date: 2014-04-08
Classification: B21H,B21K

Abstract:
1. A method for the manufacture of hollow body elements ( 200 ) for attachment to a sheet metal component ( 280 ), the hollow body elements having an at least substantially square or rectangular external outline ( 202 ) obtained by cutting individual elements by length from a section present in the form of a bar section ( 1 ) or of a coil after prior piercing of holes ( 204 ) into the section by using a progressive tool ( 10 ) having a plurality of working stations (A, B and D; B and D) in which respective operations are carried out, wherein the following steps are carried out: a) in a first step, starting from a section ( b) in a second step piercing or punching out a web ( c) in a last step separating the hollow body elements (