Retractable knife for skiving tool

Details Retractable knife for skiving tool Retractable knife for skiving tool

1981-09-14

1984-01-17

Vlachos, Leonidas

Metal working

Burnishing

Of water laid fibrous article

82 12, 407 1, 408157, 408158, 408153, 408168, 408169, 408170, B24B 3900

Patent

active

044256930

ABSTRACT:
A skiving tool having a retractable knife for use in combination with a roller burnishing tool for finishing the internal surface of a cylindrical hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion. A push dart has a camming element with complementary camming surfaces which rides along the camming path. Axial actuation of the push dart causes the knife holders to extend radially into a stable, locked position. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. A plurality of frustoconically tapered rollers are arranged about the outer surface for rolling engagement with the outer surface with the smaller ends of the rollers facing forward. The taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis. The rollers are biased in the forward direction with a chosen force so that the force exerted on the internal surface of the hole remains constant over a range of sizes of the hole.

REFERENCES:
patent: 1043874 (1912-11-01), Schroeder
patent: 2090718 (1937-08-01), Young
patent: 2178384 (1939-10-01), Young
patent: 2367560 (1945-01-01), Boland
patent: 3728037 (1973-04-01), Benjamin et al.
patent: 3853422 (1974-12-01), Benjamin et al.
patent: 3980442 (1976-09-01), Riekeles
patent: 4054976 (1977-10-01), Ewald et al.
patent: 4367576 (1983-01-01), Dickinson

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