GB227484A - Improved manufacture of metal sheets - Google Patents

Abstract

227,484. Wade, H., (United Engineering & Foundry Co.). Sept. 17, 1923. Rolling; cross - rolling.- Sheet metal is produced by taking large slabs of such weight that they cannot be handled manually, reducing them in a. three-high mill, trimming the edges of the rough sheet, and then passing through a series of finishing mills through some or all of which the sheets are drawn by independentlyactuated rollers serving as tensioning devices. In operation, the slabs are delivered by charging-mechanism 3 to a furnace 5 fitted with thermostaticallycontrolled shutters or doors 7 and burners or electric heating means 9. The slabs, heated to a definite temperature, are treated next in the three-high mill 11, either by straight rolling or by alternate passes on different diagonals, and then passed through the rotary shearing means 13 which trim both edges of the rough sheet. The trimmed sheets are carried to finishing mills 14, Figs. 3, 4 and 5 each of which gives the sheets a single pass. Tensioning-devices are provided, comprising wedge guides 15 or rollers 15<1> on the entering sides of each mill and a power driven reel or coiler 16 at the delivery end of the finished sheet. Each mill is driven by a separate motor 17. Heating or cooling means 18, for adjusting the temperature of the sheets, may be fitted at suitable points in the train of finishing mills. The rough sheets produced by the three-high mill may be sheared at right angles to the direction of rolling to form strips for pack rolling.