Method and apparatus for surface treatment by electrical dischar

Details Method and apparatus for surface treatment by electrical dischar Method and apparatus for surface treatment by electrical dischar

1994-10-14

1997-07-29

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 692, B23H 100

Patent

active

056519010

ABSTRACT:
A surface treatment method and apparatus therefor for providing wear and corrosion resistance, which includes relatively rotating a modified metallic member to be surface modified and a block, which may be metal only or may include a modifying material (e.g., ceramic or W-C/Co), and generating electrical discharge between the block and the modified metallic member to form a modification layer on the surface of said modified metallic member. If the modifying material is not in the block, it can be supplied via a dielectric bath or spray at the discharge interface. In this manner, the cutting edges of a cutting tool with a complicated shape can be surface modified easily to carry out tool surface treatment which increases a cutting tool life greatly. Cutting and surface treatment can be performed alternately as determined by a controller.

REFERENCES:
patent: 4310742 (1982-01-01), Pfau
patent: 4439660 (1984-03-01), Inoue
patent: 4641007 (1987-02-01), Lach
patent: 4948625 (1990-08-01), Suzuki et al.
patent: 5189276 (1993-02-01), Magara
patent: 5434380 (1995-07-01), Magara et al.

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