Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . F. The first oper-ation is to bend the sheet with the die A, thus stretchingthe metal from the beginning of the fillet, until a posi-tion is arrived at, gaged by experience, somewhat asshown in the figure. The sheet is then removed and a 3 or4-inch hole is bored through the center, depending uponthe size of the door. Then it is reheated, centered uponthe dies F and clamped to E. A conical shaped die A isnow forced through the opening and flanges the sheet asseen in this figure. The die A is
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . F. The first oper-ation is to bend the sheet with the die A, thus stretchingthe metal from the beginning of the fillet, until a posi-tion is arrived at, gaged by experience, somewhat asshown in the figure. The sheet is then removed and a 3 or4-inch hole is bored through the center, depending uponthe size of the door. Then it is reheated, centered uponthe dies F and clamped to E. A conical shaped die A isnow forced through the opening and flanges the sheet asseen in this figure. The die A is pushed through andthe key K removed. A flat portion of about ij^ inchesis allowed upon the die at H. In Fig. 49 is seen quite a common construction wherethe boiler fits very snugly between the frames and whereit is desired to get a spring staple, or some other con-struction between the boiler and the frame. The mud 93 Flanging. ring is notched out at T and the sheet is flanged to fit 50 represents a cross-section through this sheet andthe dies used in bending it. The dies used for this pur-. Figure 51 Dies for flanging in Fig. 49. pose are very simple and cheap. They are indicated inFig. 51. They are made out of round iron of a diameterequal to the set of the flange and bent so as to give therequired size and angle to the sheet. A mark is placedon the die. Having located the die to suit this mark andlaterally to suit the lines laid out on the sheet, the dies ofthe machine E and F, Fig. 50, are brought together andthe sheet is flanged. In Plate 2 will be seen a crown bar T iron, which isbent to suit the curvature of the crown sheet and alsoone above it to suit the curvature of the sheet. Refer-ring to Fig. 52, D-l and D2 are cast iron dies, R being therequired radius. The iron is heated, placed between the 94 Flanging. ?dies and forced together by the hydraulic pressure. Thesedies are rough castings except at F where they areplaned. In conclusion a few remarks on the siz
Size: 2530px × 987px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
