Manufacture of piston rings

Details Manufacture of piston rings Manufacture of piston rings

1985-07-01

1987-03-24

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

51290, 427198, 427199, 427201, 427276, 427277, 427289, 427359, B23P 1506, B05D 508

Patent

active

046513957

ABSTRACT:
A method of treating piston rings to render their surfaces extremely hard-wearing, wherein the rings are assembled in batches on a tubular mandrel which is then surrounded by a matching cylinder, the mandrel bearing the rings and the cylinder being subjected to relative cyclical motion while a slurry of hard silicon carbide particles is poured into the cylinder. Either the wall of the tubular mandrel, or the wall of the cylinder, or both, are provided with holes to allow the slurry to flow away. The cyclical motion may consist of relative rotation at 170 r.p.m. and simultaneous relative reciprocation at 5 cycles per minute. The slurry may consist of 220 mesh silicon carbide powder in oil, with the treatment lasting for one minute, and preferably this is followed by a further treatment of one minute with a 400 mesh silicon carbide particle slurry.

REFERENCES:
patent: 1246996 (1917-11-01), Pfeifer
patent: 2558286 (1951-06-01), Albertson
patent: 2577818 (1951-12-01), Shaw
patent: 2929174 (1960-03-01), Aumiller
patent: 3137019 (1964-06-01), Bornefeld
patent: 3333579 (1967-08-01), Shockley et al.
patent: 3961104 (1976-06-01), Tanner
patent: 4125637 (1978-11-01), Tanner

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