Metal deforming – By application of fluent medium – or energy field – By kinetic energy of fluid or field
Patent
1983-09-15
1986-02-25
Crane, Daniel C.
Metal deforming
By application of fluent medium, or energy field
By kinetic energy of fluid or field
72 61, 29 111, 29446, B21D 2602
Patent
active
045719691
ABSTRACT:
An autofrettage process which relates to the autofrettage of thick-walled cylinders through the cyclical application of high pressure to the internal bore of the cylinder. The invention encompasses the autofrettage of cylindrical members in cyclical pressure stages each of a few seconds to a few minutes in duration during each of which the bore of the cylinder being autofrettaged is subjected to a pressure in the range of about zero to the lower of the two pressures; one is the pressure that causes a complete plastic deformation to the outer wall and the other is twice the bore yield pressure. Preferably, the pressurizable hydraulic fluid medium utilized for the autofrettage is ethylene glycol or hydraulic oil, or any similar fluid which will not freeze or solidify at the pressures encountered during the inventive process. The autofrettage pressure may be increased between one or more cyclic applications of pressure.
REFERENCES:
patent: 1329762 (1920-02-01), Guy
patent: 1391010 (1921-09-01), Schneider
patent: 1495587 (1924-05-01), Grimm
patent: 1602282 (1926-10-01), Methlin
Crane Daniel C.
Jones David B.
National Distillers and Chemical Corporation
Tremain Kenneth D.
LandOfFree
Autofrettage process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Autofrettage process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Autofrettage process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1006009