Metal treatment – Process of modifying or maintaining internal physical... – With measuring – testing – or sensing
Patent
1992-01-22
1993-08-17
Larson, Lowell A.
Metal treatment
Process of modifying or maintaining internal physical...
With measuring, testing, or sensing
723425, 72110, 148525, B21D 316
Patent
active
052358380
ABSTRACT:
In a straightening or truing operation for straightening out of true work pieces the characteristic fatigue strength or an increased fatigue strength achieved in a previous strengthening operation of the work piece to be straightened, is maintained. This is achieved by a truing operation, wherein locally bounded compressive residual stresses are induced in a surface layer zone of the work piece by a hardening operation, whereby the respective out of true deformation of the work piece is at least reduced. The truing operation may then be repeated until the out of true deformation is eliminated. The compressive residual forces are induced in a surface layer zone of the work piece by a locally bounded hardening operation or a strengthening rolling operation. By appropriately varying the extent of hardening or the rolling force respectively, the magnitude and angle of any out of true deformation may be affected so as to be even completely eliminated, for example.
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Machine Design, "Fillet Rolling"; by W. Egger and G. X. Diamond; pub. on Jan. 5, 1961; pp. 112-119.
Steel, "Peening Cuts Stress Corrosion"; pub. on Dec. 21, 1959; p. 88.
Article Entitled: "Gezieltes Haerten Durch Laserlicht" by F. U. Meis et al. (Aimed Hardening by Laser Light), published in Industrie Anzeiger, Nrs. 56 & 57, Jul. 20, 1985, pp. 29, 30, and 31.
Article Entitled: "Moeglichkeiten der Oberflaechenveredelung Durch CO.sub.2 -Laser" (Possibilities of Surface Finishing by CO.sub.2 -Lasers) by H. W. Bergmann, vol. 1, No. 1, 1985, pp. 136 to 141, published in Opto Electronik Magazin.
Article Entitled: "Schwingfestigkeitsoptimierung Von Gesenkschmiedeteilen Durch Randschichtverfestigungsverfahren" (Optimizing Vibration Strength of Dropped Forged Parts by Surface Layer Strengthing Methods) by K. H. Kloos, VDI Berichte, pp. 113 to 140, published in VDI-Berichte (date not known).
Fasse W. G.
Gurley Donald M.
Kane, Jr. D. H.
Larson Lowell A.
W. Hegenscheidt Gesellschaft mbH
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