POWDERED METAL MULTI-LOBULAR TOOLING AND METHOD OF FABRICATION

Title:

POWDERED METAL MULTI-LOBULAR TOOLING AND METHOD OF FABRICATION

Document Type and Number:

WIPO Patent Application WO2005102559

Kind Code:

A3

Abstract:

A tool (10) made of powdered metal, such as a modified T15 HSS in powdered form, and having a multi-lobular end profile (12) for punching multi-lobular recesses into workpieces, such as into the heads of fasteners. The tool (10) is homogenous and contains only carbides which are relatively small, such as in the 1-4 micron range. Also provided is a method of fabricating such a tool. The method requires that a powdered metal bar is cut and then the cut piece is worked to provide the multi-lobular tool. The final part is theoretically 100% dense, as opposed to being only 95-98% dense as in metal injection molded parts. In use, the final part, due to how it is fabricated, has increased column strength and increased impact resistance.

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Inventors:

KLETECKA EDWARD (US)
KURTZ SEAN (US)

Application Number:

PCT/US2005/007040

Publication Date:

December 22, 2005

Filing Date:

March 03, 2005

Export Citation:

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Assignee:

TEXTRON INC (US)

International Classes:

B21J13/02; B21K1/44; B21K1/46; B21K5/20; B22F5/00; B23P13/04; C21D1/00; (IPC1-7): B23P13/04; C21D1/00

Foreign References:

US6537487B1

2003-03-25

Other References: