Patent ID: 7581424

Claim:
A method for reinforcing a wall region of a three-dimensional attachment for high torque loads, comprising: cutting a plate out of a flat strip with a substantially evenly curved outer contour; and forming and fine blanking the plate into a pot-shaped body with a desired structural configuration including a surface formation, whereby at the body is formed a curved edge with a toothing, said pot-shaped body including a wall region between the curved edge and a base of the pot-shaped body of the attachment, and further performing at least a two-staged cold-extrusion process in respectively opposite flow directions angular to a respective die movement to cause a purposeful material shifting in an area of the plate corresponding to the wall region to a degree that approximately equalizes runoff of the material caused by the forming to reinforce the wall region of the attachment when formed, in a first step of said at least a two-staged cold-extrusion process, the material in a region of the plate is caused to flow by a moving die in a direction corresponding to a die movement direction in a manner such that a material volume is accumulated in a space in a pressure plate contacting an outer side of the plate opposite to said die and lying in a direction angular to the die movement direction, and in a second step of said at least a two-staged cold-extrusion process, the accumulated material volume created by the cold-extrusion is shifted in another direction opposite to said direction in the first step into another space in a pressure pad in a manner such that the wall region develops a desired thickness when formed which is tailored to a required load.