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 . the sheet at E and E. and draw the center line out the rigl--hand portion full size on the sheet, andmeasure off the length of the neutral line A. This distance ismeasured off from the straight line of the sheet around thecurve to the end of the flange. Project the starting point onthe left-hand view and lay od A -\- 14 inch. This flange hasthe same width all the way around. Draw the outline of thesheet all around, at thi
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 . the sheet at E and E. and draw the center line out the rigl--hand portion full size on the sheet, andmeasure off the length of the neutral line A. This distance ismeasured off from the straight line of the sheet around thecurve to the end of the flange. Project the starting point onthe left-hand view and lay od A -\- 14 inch. This flange hasthe same width all the way around. Draw the outline of thesheet all around, at this distance from the line of the sheetwhen flanged. In a similar manner we determine the neutralline B of the front flange. Lay off a distance B -\- ^-inch asshown. Strike a radius R from the limiting line of the insideof the sheet, also lay out the bridges i, 2, 3, etc., to hold thissheet together while the outside is being flanged. In trimmingoff the extra metal around the outside, sheer close to the lineat G around the corner, but allow a liberal margin, say, yiinch, at all the other places. When the sheet is flanged the HOW TO LAY OUT A LOCOMOTIVE BOILER 8i. _10- 0- _^ Fi. 46 metal will crowd around at G, so that we get more metal herethan the flat sheet would indicate. After this sheet comes back from being flanged, level it onthe layout bench and measure it to see if it will hold iip todrawing sizes all around. With the surface gauge, run aroundthe outside and la} off the front and back line of the the drawing gives sufficient details to locate someof these rivets, but often this is left entirely to the layout case nothing is specified, begin the front and back rivetson the top center, also settle on the location for the rivets onthebottom of the sheet. With a measuring wheel get the runof the boiler inside on the front between these extreme this on the sheet, and see that the same checks up withtlie sheet, to which this top throat shee
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
