Hydraulic contouring means for a hot or cold leveler machine

Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element

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Details

72 21, 72164, B21B 3708, B21D 102

Patent

active

047304723

ABSTRACT:
A hot or cold leveler is provided having conventional high loaded driven work rolls backed up longitudinally across their face by a plurality of short backing rolls. A series of lower work and backing rolls are cassette mounted on the lower main frame of the leveler. The upper backing rolls are mounted on an intermediate support frame designed for limited flexure and which in turn is supported across its length by a plurality of hydraulic piston-cylinder assemblies fixed in the top main frame of the leveler for contouring of the leveling action. Each cylinder is controlled by a servo valve which can be operator-adjusted to work the sheet material across its width dependent on sheet flatness. Buckling at the center, quarter, or edges of the sheet can be removed by a corrective positioning of the piston-cylinder in the location of the buckle. Entry and delivery rollers are similarly servo-controlled. The entry roll is backed off to permit the sheet product to enter the machine and it acts as an anvil roll. The delivery roll is adjusted to deliver flat product onto a delivery table. Pressure transducer means and piston position transducer means are provided in each cylinder, whereby a positive feedback signal is provided due to loads on the flexible beam exerted by the material being worked to withdraw or inject hydraulic fluid to the cylinders.

REFERENCES:
patent: 1911321 (1933-05-01), Long
patent: 2429142 (1947-10-01), Thomas
patent: 3559432 (1971-02-01), Rastelli
patent: 3596489 (1971-08-01), Ball
patent: 3906767 (1975-09-01), Tanaka et al.
patent: 4454738 (1984-06-01), Buta
patent: 4468944 (1984-09-01), Foss
patent: 4481800 (1984-11-01), Ruhl

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