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Hard Metal Faced Cutting Tools

IP.com Disclosure Number: IPCOM000092804D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Thomas, HW: AUTHOR

Abstract

The use of bonded facings for machine cutting tools increases operational efficiency. The forward end of broach 10 has body 12 of relatively soft steel generally shaped for cutting the final product. Plates 14 and 16 are made of hardened high-speed steel sheet close to the exact dimensions desired. Plates 14 and 16 are bonded to the body with epoxy resin. The surfaces 14' and 14'' and 16' and 16'' are ground to the exact dimensions for cutting purposes. The tool can be sharpened many times before a new set of plates is required. By heating the tool to approximately 700 degrees F the bond is charred and the plates can be removed and replaced by new ones.

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Hard Metal Faced Cutting Tools

The use of bonded facings for machine cutting tools increases operational efficiency. The forward end of broach 10 has body 12 of relatively soft steel generally shaped for cutting the final product. Plates 14 and 16 are made of hardened high-speed steel sheet close to the exact dimensions desired. Plates 14 and 16 are bonded to the body with epoxy resin. The surfaces 14' and 14'' and 16' and 16'' are ground to the exact dimensions for cutting purposes. The tool can be sharpened many times before a new set of plates is required. By heating the tool to approximately 700 degrees F the bond is charred and the plates can be removed and replaced by new ones.

Clearances are formed with ease as in channels 18. The latter are relieved with respect to the apertures or parallel lands between the cutting teeth. Should clearance be required on the lands, they are ground with little difficulty. The high channel relief clearances reduce friction and drag during ope ration. Large piece s of brittle carbide can be epoxy-bonded to broaches or similar tools free from the hazards of brazing processes.

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