Method and device for producing highly dimensionally accurate flanged half shells

A method for producing highly dimensionally accurate, deep-drawn half shells, the method comprising the steps of:

• forming a pre-formed half shell from a blank such that is has a base region, a body region depending upwardly from the base region having opposed sidewalls, a flange region depending outwardly from the body region, and a transition region between the body region and the flange region;
• wherein the step of forming includes forming the pre-formed half shell such that it possesses a substantially constant wall thickness in its entirety;
• and
• wherein the step of forming includes forming the pre-formed half shell such that it possesses excess blank material due to its geometrical shape, particularly in a single bend in the transition region, the single bend having a first central flange bend radius in the transition region thereof between the flange region and the body region;
• pressing the pre-formed half shell into a finally finished product, wherein the excess blank material of the single bend in the transition region of the pre-formed half shell is provided such that the single bend has a second central flange bend radius in a transition region of the finally finished product that is different than the first central flange bend radius after the step of forming.