Coupling unit e.g. yoke, fabricating method for universal joint of car steering, involves realizing plastic deformation to form gauge with base, where gauge is calibrated and base constituting material is extruded to obtain gauge

摘要

The method involves obtaining a piece of steel, and realizing a plastic deformation at cold for forming a gauge with a base (6). Another plastic deformation is realized at cold to obtain another gauge. The latter gauge is calibrated and a part of material constituting the base is extruded to form an opening to obtain a third gauge. Finishing of the third gauge is done to obtain a coupling unit. An independent claim is also included for a coupling unit such as yoke for universal joint.