Patent ID: 6913273

Claim:
A method of making a control arm, with the control arm having a connection tube provided on opposite ends with mounting eyes, each mounting eye including a sleeve, which has a protruding collar, and a bearing element, which is embedded in the sleeve, said method comprising the steps of: sizing an elongate tubular member of circular cross section to a length plus overmeasure of a connection tube of a control arm; forming through extrusion a profile of a cross sectional configuration in accordance with a sleeve of the control arm; dividing the profile to form sleeve blanks which are each configured at an axial height commensurate with a height of the sleeve and include a protrusion; vulcanizing bearing elements in the form of rubber-metal elements into the sleeve blanks; clamping in an axially shiftable manner the sleeve blanks and the tubular member in a friction welding machine; machining the protrusion of the sleeve blanks to form a protruding collar with circular ring shaped end surface; friction welding the end surface of the sleeve blanks to circular ring shaped end surfaces of the tubular member; calibrating the joined sleeve blanks and the tubular member at their joints through cold upsetting; and smoothing the joints about their circumference.