Patent ID: 8176763

Claim:
A method for the production of a hollow section of a toothed rack or a hollow toothed rack from a planar metal sheet, wherein a longitudinal axis of the hollow section of the toothed rack extends parallel to a longitudinal direction and the hollow section of the toothed rack comprises a wall which encompasses the longitudinal axis of the toothed rack in a circumferential direction and in at least one subregion is comprised a toothing, said method comprising: fabricating the planar metal sheet in a first forming die into one of a half-shell form and a U-form comprising two shanks with two ends connected with one another by a connection section, subsequently, simultaneously or before said fabricating the planar metal sheet, fabricating the toothing by pressing at least one tooth into the metal sheet, and after said fabricating the planar metal sheet in the first forming die into one of the half-shell form and the U-form, bending, in at least one step, the ends of the two shanks together under the formation of a hollow volume extending in a direction of the longitudinal axis, wherein into the metal sheet, at least one attenuation or holding edge or at least one attenuation and holding edge are formed at least on an outer surface of the wall spaced apart in the circumferential direction from the already worked-in, or still to be worked in, toothing, and, with reference to the longitudinal direction of the toothed rack, when the toothing is formed the attenuations extend along at least a portion of the length of the toothing, and wherein the at least one attenuation or holding edge or the at least one attenuation and holding edge counteracts an uncontrolled shape deformation of the toothing.