Patent ID: 8155777

Claim:
A method for designing a tool for deep drawing of sheet metal to form a sheet metal component having a predefined component geometry, said tool comprising a die, a binder and a punch, whereby the binder is used to fix the sheet metal in an edge zone of the die, before the sheet metal is pressed in a drawing direction by the punch into the die, said tool comprising at least one addendum zone surrounding the component, said tool is generated by a method comprising: (a) preparing the predefined component geometry; (b) determining a direction of drawing; (c) creating a fill surface for smoothing irregular zones of an edge of the predefined component geometry; (d) generating a binder surface; (e) generating the at least one addendum zone by (i) defining sectional profiles at defined points; (ii) determining sectional profile directions; and (iii) interpolating intermediate profiles using forming technology parameters for creation of the at least one addendum zone (f) interactively adapting characteristic lines and correspondingly adapting the at least one addendum zone; and (g) creating a punch opening line as intersections of the sectional profiles with the binder surface.