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 . be added below this. In Fig. 22, both lapsand flange have been omitted. Since the vertical section fits inside the inclined section, tlie 15-0806283262832 or 635^ As it is not necessary to have a close fit in this case, makethis length 63J4 inches. As there is an irregular cut at each end of the plate, takea cross-section at any point in the cylinder as the section 5 T,and measure the length of each of the parall
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 . be added below this. In Fig. 22, both lapsand flange have been omitted. Since the vertical section fits inside the inclined section, tlie 15-0806283262832 or 635^ As it is not necessary to have a close fit in this case, makethis length 63J4 inches. As there is an irregular cut at each end of the plate, takea cross-section at any point in the cylinder as the section 5 T,and measure the length of each of the parallel lines from thissection in both directions. Lay out the line S T, Fig. 23, 63J4inches long; divide it into sixteen equal parts, drawing linesat right angles to 5 T at these points; and lay off the lengthsof these lines as measured from the elevation. Fig. 21. Thisgives the development of this plate to the rivet and flangelines. Without giving further examples it will be seen that thedevelopment of any cylindrical surface can be obtained inthe manner above described if a projection of the solid on aplane parallel to its axis can be drawn. If the axes of two or. FIG. 23. more intersecting cylinders lie in the same or parallel planes,such a projection may be obtained. If their axes do not lie inthe same or parallel planes, it will be necessary to find thetrae lengths of the parallel lines on each solid separately. THE OF ANGLE-IRON RINGS. Where it is necessary to bend bars of angle-iron into theform of a circle or ring in order to fit around a circular tankor pipe, it is a much easier and quicker job to lay out the barsand punch the rivet holes before the iron is bent. This can bedone very accurately, and is by no means a difficult job oflaying out. It is necessary, however, to know some rule bywhich the exact length of the bar may be obtained, so thatwhen it is bent either the inside or the outside diameter of thering, depending upon whether it is an inside or outside an
Size: 1895px × 1319px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
