. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . fter being once set, they may all be adjusted at the sametime without disturbing their relative positions. 744 ROLLS, METAL WORKING. ROLLS, METAL WORKING. Roughing Train and Boubling 3Iachine for a Tin-plateRolling Mill. — Theodore L. Thomas, of the Union Works of the Illinois Steel Co.,Cliicago. has designed a mill for rolling tin-plate bars, which is herewith illustrated, Fig. 1showing the side elevation, and Fig.
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . fter being once set, they may all be adjusted at the sametime without disturbing their relative positions. 744 ROLLS, METAL WORKING. ROLLS, METAL WORKING. Roughing Train and Boubling 3Iachine for a Tin-plateRolling Mill. — Theodore L. Thomas, of the Union Works of the Illinois Steel Co.,Cliicago. has designed a mill for rolling tin-plate bars, which is herewith illustrated, Fig. 1showing the side elevation, and Fig. 2 the ground plan. Mr. Thomas has also devised a doub-ling machine, likewise shown in the illustrations, which is an important part of the appa-ratus. This mill is intended to break down tin-plate bars and prej)are them for the usual fin-ishing train. It consists of three sets of rolls, three high, inclosed in one i)air of housingsand driven by one engine, as indicated by the gearing. The doubling machine consists offour folding-doors lying at floor level, with shears in the center. In the usual method of making sheets for the tinning process, the practice followed is to. Fig. 1 .—The Thomas roughinir train and doubling machine. take a7-in. bar, cut to suitable width, which is subjected to live heatings and five rollings,with four doublings. The five rollings are known to millmen as (1) molding, (2) singling.(3) doubling, (4) fours. (5) ciglits. finishing to suitable lengths. The descriptionapplies to what is known in the market as It 20 x 14. By Mr. ihomass method a is taken. It is heated, passed through the lower rolls in the direction of the arrow,shown in Fig. 1, and then back through the upper rolls. The rolls are adjusted by lining,graduating the work on the bar throughout the six passes. Guide rollers between the rollskeef) the bar in proper position for the next rolls. The rolls are a sufficient distance apartto prevent buckling. The sheet which emerges f
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
