Factory and industrial management . I FIG. S3 MILLING ENDS OF CYLINDER 34. MILLING UNDER SIDE OF CYLINDER FLANGES. 714 EUROPEAN LOCOMOTIVE WORK. 715 remaining with the same disposition as in the original two-cyhndercompound arrangement introduced by M. Anatole Mallet in 1876, buttwinned—with two high-pressure on one side and two low-pressure onthe other—an arrangement that has given the very best of results inservice, there being no compound engines which run with greaterregularity of movement. At the time of writing, 88 engines are inconstruction with these cylinders, of which 12
Factory and industrial management . I FIG. S3 MILLING ENDS OF CYLINDER 34. MILLING UNDER SIDE OF CYLINDER FLANGES. 714 EUROPEAN LOCOMOTIVE WORK. 715 remaining with the same disposition as in the original two-cyhndercompound arrangement introduced by M. Anatole Mallet in 1876, buttwinned—with two high-pressure on one side and two low-pressure onthe other—an arrangement that has given the very best of results inservice, there being no compound engines which run with greaterregularity of movement. At the time of writing, 88 engines are inconstruction with these cylinders, of which 12 are at Maffeis. Themachining of these pieces is interesting by reason of the size of thewhole group when bolted together—close to the center line. Theprocess of working as carried out in the .Ernesto Breda LocomotiveWorks of Milano, Italy, Is shown in the accompanying views. Thecylinders are rough-bored for detecting any defect which would atonce condemn the casting. A double-headed cylinder borer by the. Niles Tool Works, Figure 31, is employed for this work and the cast-ings are then passed on to the large double-spindle milling machineby Guller & Zust of Intra, Lago Maggiore, Figure 32, which machinesthe central joints for the bolting together of the two castings. Thismachine does face and edge milling. Figure 33 shows both spindlesengaged in edge milling the ends of the central lugs, and Figure 34,milling the underside of the same joint with the casting simply runforward on the carriage. The cylinders are then bolted together andaccurately bored, all four cylinders and two valves simultaneously,on the six-spindle horizontal boring machine shown in the view 7i6 THE ENGINEERING MAGAZINE. IigLire 35. This is a new machine designed and consiructedspecially for the work by the Ernesto Breda Locomotive Co. with theco-operation of the noted ItaHan tool-makers Culler & Zust of Lagodi Maggiore. The machining done by it has the accuracy of jig-gedwork. The illustration will se
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
