US Patent: 4,252,038 - Modified Tool Holder to Prevent Insert Slippage and Fracture


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US Patent: 4,252,038

Modified Tool Holder to Prevent Insert Slippage and Fracture

Patentees:

Krishnamoorthy Subramanian (exact or similar names) - Inkster, Wayne County, MI

Orrin A. Newton (exact or similar names) - Northville, Wayne County, MI

USPTO Classifications:

407/100, 407/119, 407/5, 407/6, 82/1.11

Tool Categories:

metalworking machines : metalworking machine tool holders : insert tool holders

Assignees:

Ford Motor Co. - Dearborn, Wayne County, MI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Sep. 17, 1979
Granted:	Feb. 24, 1981

Patent Pictures:

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Description:

Abstract:

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.