Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . ILER MAKERS then heat the punched side and the corner, not paying any at-tention to the other wing. When the patch is hot, bolt it upfast and tight in position, then, striking squarely against thecold wing, drive and upset the surplus metal into the is a much better way than fullering; however, some maythink to the contrary. While the metal is hot keep 3Our at-tention confined to the corner only, which is the real vi
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . ILER MAKERS then heat the punched side and the corner, not paying any at-tention to the other wing. When the patch is hot, bolt it upfast and tight in position, then, striking squarely against thecold wing, drive and upset the surplus metal into the is a much better way than fullering; however, some maythink to the contrary. While the metal is hot keep 3Our at-tention confined to the corner only, which is the real vitalpoint. When the patch commences to lose its color it willno longer upset easily. Then it will be time to work the sidesin and tighten up the bolts more. A stay-bolt and rivet holecan now be marked on the other wing. In marking the rivethole be sure to allow a little for draw, as the iron has not yetentirely filled the corner. In this last heat both wings can beworked up, iron to iron, and the draw hole will still furthercrowd the iron into the corner. A fuller worked in the cor-ner, both top and bottom, and a flatter on both wings willcomplete the laying rig. s The patch bolt holes are now marked as mentioned before;the mud-ring rivet holes are marked with a scriber from theoutside. The surplus metal around the edges is also markedwhere it is to be cut off. It will be noticed that the wing onwhich the last heat was taken has sagged at the bottom andextends below the mud-ring about ^ inch, according tolength of wing. This sag is due partly to offsetting, andpartly to door or side sheet being out of perpendicular. Anexperienced man will allow for this, and instead of cuttingand offsetting his metal straight at bottom, will move up-ward on short wing something like Y2 inch in 6. As all theholes in the patch cannot be punched, have them drilled 23/32inch, with the exception of mud-ring holes, which are to befull size. It is best to heat, patch and cut off surplus metal with
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
