Ex-cell-o Gmbh

Robert R Ridley

Paul Fitzpatrick

A tool is provided for pressure forming teeth in the periphery of a cylindrical, tubular workpiece such as a power transmission member by rolling. The tool has an improved tooth generating configuration which improves the flow characteristics of the metal in the workpiece and develops uniformity of tooth wall thickness during the tooth generating process.

Tooth forming tool and method for splining tubular elements

A tool and method for pressure forming teeth on the periphery of a cylindrical work piece wherein each of the teeth has a predetermined crown formed thereon. The tool includes a body having a leading edge and a trailing edge. The trailing edge of the tool body has an undercut surface thereon supportingly receiving a tooth crowning section having the side edges thereof shaped outwardly of the undercut surface on the tool to shape transversely formed insert teeth to form a predetermined crown on the teeth of the part being formed by the tool. In one method, preformed teeth on a rack insert are formed by a grinding tool following a straight path; the insert for forming the crown on the rolled part then is held on a grinding fixture base by a center shim so as to form a concave surface on the underside of the insert by exceeding the modulus of elasticity of the rack insert material wherein, following removal of the insert from the grinding fixture base, the teeth surfaces on the rack insert are shaped in a convex form to produce crowning of spline teeth on a cylindrical member that is pressure formed by the insert.

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Pontiac, MI, United States of America

Robert R Ridley