Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1989-04-03
1990-05-15
Howell, Daniel
Cutting by use of rotating axially moving tool
Processes
Bit detachable
82 111, 407119, 408144, B23B 3500, B23B 100
Patent
active
049253468
ABSTRACT:
The wear life of a high-speed tool steel cutting bit is increased by (a) cleansing the bit by subjection to an ion beam; (b) while preventing the temperature of said cleansed from rising above 350.degree. C., coating the cleansed bit by condensing sputtered atoms of titanium and boron thereonto, the condensation being carried out to provide a coating thickness of 2-6 microns. An argon or krypton beam of ions is accelerated to 1300-1800 volts as a broad-beam ion source to sputter a titanium diboride target arranged as a cathode. The sputtering is carried out for 5-10 minutes while the bit is heated to about 200.degree. C., and a soft vacuum of about 4-6 milli-torr is used during the process.
REFERENCES:
patent: 3160480 (1964-12-01), Alliegro
patent: 4237184 (1980-12-01), Sonseth et al.
patent: 4411960 (1983-10-01), Mizulara
Hoffman David W.
Moskowitz David
Schmatz Duane J.
Ford Motor Company
Howell Daniel
Malleck Joseph W.
May Roger L.
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