Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The Derry Collard Co. Figure 109A handy way of using bending rolls. bending a sheet as seen in Fig. 109, but when the sheetsare not so thick and when the rolls are powerful, thecorners of a Belpaire crown sheet can be bent cold by 139 Bending large radius corners. bringing the top roll down against the bottom rolls andpunching the sheet between them as indicated. B is arough casting with studs S screwed into it. C is a pieceof wrought iron bent around so as to form a clamp. Bythis means almo
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The Derry Collard Co. Figure 109A handy way of using bending rolls. bending a sheet as seen in Fig. 109, but when the sheetsare not so thick and when the rolls are powerful, thecorners of a Belpaire crown sheet can be bent cold by 139 Bending large radius corners. bringing the top roll down against the bottom rolls andpunching the sheet between them as indicated. B is arough casting with studs S screwed into it. C is a pieceof wrought iron bent around so as to form a clamp. Bythis means almost any radius R, within the limit of themachine, can be obtained. Fig. no shows a very large. Figure HO Tlie Derry Collard Co. Another use of bending rolls. radius which is obtained in the same way. B is also arough casting and held to the rolls by cap screws. Sometimes a spiral seam is required for certain work,especially in the air reservoirs of air engines where the 140 Spiral seams. pressure is very high. As the heavy welt strips thatwould be necessary for this pressure would make a diffi-
Size: 1631px × 1531px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
