Controlling thickness and planarity of hot rolled strips

Details Controlling thickness and planarity of hot rolled strips Controlling thickness and planarity of hot rolled strips

1986-03-27

1987-12-08

Spruill, Robert L.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72 11, 72 16, 72 17, 72234, 72366, B21B 3700

Patent

active

047111097

ABSTRACT:
A metallic strip is hot-rolled in a succession of roll stands arranged in a row by passing the strip longitudinally in a travel direction through the stands. The strip is then compressed in the upstream stands to substantially reduce its thickness measured perpendicular to the travel direction and parallel to the strip while substantially increasing its width measured perpendicular to the travel direction and transverse to the strip. Then in the downstream stands it is compressed and tensioned without substantially increasing its width to level it and stretch it longitudinally in the travel direction. With standard steel strip this critical thickness is about 12 mm. The local band thickness is measured downstream of the upstream roll stands and the furthest downstream stand of the upstream stands is operated to eliminate any nonuniformities in thickness thus detected. The nonuniformities are detected by comparing the local band thicknesses detected with standard set-point thicknesses.

REFERENCES:
patent: 3599459 (1971-08-01), Yeomans et al.
patent: 3782152 (1974-01-01), Sabatini
patent: 3839888 (1974-10-01), Greenberger
patent: 3841124 (1974-10-01), Shida et al.
patent: 3855830 (1974-12-01), Kitanosono et al.
patent: 3882709 (1975-05-01), Kawamoto et al.
patent: 3934438 (1976-01-01), Arimura et al.
patent: 4261190 (1981-04-01), Fapiano

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