Factory and industrial management . departments haveeither been recently built or reconstructed, and, even at the time ofmy visit, extensions were still in progress. They at present includethree blast furnaces, one Lancashire forge, two open-hearth furnaceswith an aggregate capacity of 45 tons, rolling mills for bar and sheetiron, a large building for annealing gun ingots and armour plates,steel foundry, gun shops, etc. For modern equipment, arrangementsand methods, the various departments and workshops challenge com-parison with those of the largest establishments abroad, and I notedwith much
Factory and industrial management . departments haveeither been recently built or reconstructed, and, even at the time ofmy visit, extensions were still in progress. They at present includethree blast furnaces, one Lancashire forge, two open-hearth furnaceswith an aggregate capacity of 45 tons, rolling mills for bar and sheetiron, a large building for annealing gun ingots and armour plates,steel foundry, gun shops, etc. For modern equipment, arrangementsand methods, the various departments and workshops challenge com-parison with those of the largest establishments abroad, and I notedwith much interest, distributed over the works and in active operation,cranes, forge presses and a great variety of machine tools, of Britishand American manufacture. Prominent among the products may bementioned guns and projectiles, homogeneous rolled or cast oil-tem-pered armour for cupolas for coast and land defence, and steel cast-ings, such as rudder , propellers, anchors, etc., up to 45-tonsweight. 696 THE ENGINEERING BREECH END OF BOFORS GUN. Increasing attention has been devoted during recent years to themanufacture of war material, and so far at least as guns of big calibreare concerned Bofors may be said to enjoy a unique reputation. Else-where, all trials with a view to making such guns of cast unwroughtsteel have resulted in failure, owing, apparently, to difficulty in secur-ing sound ingots of sufficient strength and ductility. At the Boforsworks, however, thanks to special methods of casting and annealing,elaborated after long series of experiments, no such trouble is ex-perienced. The ingots are cast solid with large dead heads, but inother respects of about the size intended for the gun. The core isthen bored out, the tubular block being subsequently subjected to aseries of heat treatments in order to secure the proper physical quali-ties. Then the gun is built up from various parts in the usual times, the ingot with the dead head is
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
