Patent ID: 9061337
Filing Date: 2015-06-23
Classification: B21D,B23P,E04C,E04F,H02B,Y10T

Abstract:
1. A method for producing rectangular or square wall elements from flat sheet metal, comprising: determining a length and width of a wall element; providing a flat sheet metal piece made of flat sheet metal material having a material thickness, which piece has two longitudinal edges of the determined length and two transverse edges of the determined width and projects by a predetermined extent along each longitudinal edge and transverse edge in order to form two mutually opposite longitudinal edge portions and two mutually opposite transverse edge portions having a predetermined edge width, the longitudinal edge portions and the transverse edge portions each having a short lateral edge having a dimension of the edge width; incising the two longitudinal edge portions parallel to the transverse edge in order to form two incisions having an incision length which is smaller than the edge width so as to form two tabs for each longitudinal edge portion which are separated by a respective incision from the remaining longitudinal edge portion and have a transverse dimension; right-angled folding of a respective strip, formed by the incisions, of the remaining longitudinal edge portion parallel to the longitudinal edge, the strip having a width which corresponds at most to the incision length less the material thickness; right-angled folding of the tabs parallel to the longitudinal edge at a level of a base of the associated incision; right-angled folding of the longitudinal edge portions along the longitudinal edge; right-angled folding of the transverse edge portions parallel to the transverse edge to form a strip having a width corresponding to a transverse dimension of the tabs; and right-angled folding of the transverse edge portions along the transverse edge.