Patent ID: 7310876

Claim:
A method for producing a one-part piston body for a piston-cylinder arrangement, in particular a shock absorber piston, that is provided on its peripheral surface in an area adjacent to a final piston area with a revolving web that protrudes beyond the peripheral surface, to which longitudinal support webs are adjacent that extend to the other final piston area and that are disposed parallel to and at a distance from each other, each pair of adjacent support webs delimiting a groove-shaped recess, the ends opposite the revolving web of said recesses being open in the longitudinal direction, said method comprising in a first step a green compact comprising the revolving web and the longitudinal support webs is pressed from a sinterable metallurgical powder, and in a second step the green compact is finally sintered to form a blank, and in a third step radially disposed stamping tools are used to form, under material displacement, at least two transverse grooves into at least a part of each longitudinal support web so that each support web is at least divided into three longitudinal parts, through cold deformation, and in a fourth step the blank provided in this way with transverse grooves is calibrated to its final form through pressing with calibrating tools.