Metal working – Method of mechanical manufacture – Roller making
Patent
1991-06-13
1992-10-20
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Roller making
2989522, 29447, 29119, 29123, B23P 1700, B21B 3108
Patent
active
051559099
ABSTRACT:
A press roll assembly having no substantial circumferential stress at operating temperature due to differential thermal expansion of the head and roller material is disclosed. In a preferred embodiment, the assembly is formed from a granite roll having opposed parallel substantially planar ends compressed between steel heads; the steel heads are preferably heated to the maximum operating temperature of the press roll assembly prior to tensioning against the press roll held at ambient temperature. Preferably, there is a rectilinear interface between the heads and the roll, and preferably the heads are tensioned against the ends of the roll by tie-rods connected to the opposed heads through a plurality of longitudinal bore holes passing through the roll and heads, the bores being disposed radially outward and parallel to the axis. Upon cooling of the heads, radial compression is induced in the ends of the roll. Upon heating of the press roll assembly, the circumferential stress caused by differential thermal expansion of the heads and press roll will be offset by the radial compression.
REFERENCES:
patent: 2693670 (1954-11-01), Perry
patent: 3635637 (1972-01-01), Bergendahl
patent: 3737962 (1973-06-01), Hill
patent: 3807012 (1974-04-01), Loquist
patent: 3833982 (1974-09-01), Paulin
patent: 4272873 (1981-06-01), Dietrich
patent: 4399598 (1983-08-01), Page et al.
patent: 4642862 (1987-02-01), Muhle et al.
patent: 4658486 (1987-04-01), Schonemann
patent: 4924688 (1990-05-01), Cutmore
patent: 4991275 (1991-02-01), Adams, Sr.
patent: 5040398 (1991-08-01), Nakagawa et al.
Vestola et al., Granite Rolls--Failures, Their Prevention and Substitute Materials, Proceedings of the 1989 Annual Meeting, CCPA, Montreal, Canada, B109 (Feb. 3, 1989).
Precision Granite Products Brochure, Rock of Ages Corporation, Precision Granite Products Division, available from P.O. Box 482, Barre, Vt., 05641.
Dywidag Threadbar Posttensioning System Brochure, available from Dywidag Systems International of New Jersey, U.S.A.
Murray Donald C.
Parrott Gerald E.
Eley Timothy V.
Rock of Ages Corporation
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