Ford Motor Company Limited

Orrin A Newton

Krishnamoorthy Subramanian

Disclosed are a method for fixturing and manufacturing a machined workpiece, an article of manufacture including, in combination, a workholder and a workpiece, and a core box used to form the workholder. The workholder preferably is made of a cured resin bonded sand mixture. The workpiece is placed within the core box. Then the uncured resin bonded sand mixture is packed about the workpiece in the core box and allowed to cure to form a frangible workholder for securing the workpiece. The core box may then be disassembled to release the workholder. The workholder next is positioned and affixed relative to a machining apparatus and machined. Mechanical forces, such as impact blows and/or abrading particles, such as sand or shot, are applied to the frangible workholder to disintegrate the workholder from about the machined workpiece.

Method for fixturing a workpiece

A cutting tool holding system is disclosed. The system employs an improved chip breaker element having a lip mechanically gripping a radially extending and exposed edge of the cutting tool insert; the breaker element is held against relative sliding movement by a pin connection to a clamp which laterally urges the element and tool against the shank. Thus, the cutting insert is locked in place within the tool shank pocket avoiding premature failure from undue stress during prolonged tool cutting. The breaker element also has a chip breaker surface comprised of an arcuate segment spaced uniformly from the insert cutting point and a straight segment extending from the arcuate segment along the exposed edge of the insert.

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Northville, MI, United States of America

Orrin A Newton