Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The Derry-Collard Co. Figure 4?Flanging fire door shown in Plate 3. 90 Flanging. shows the back head flanged in opposite directions. Theouter portion of the flange is the first operation, then thesheet is reheated and placed in the dies as shown in , when the fire doors are flanged one at a time bythe die A. The press here shown has a top cylinder and. Figure fire door shown in Plate 3. this cylinder is provided with an adjustment along theline radially from the center. The
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The Derry-Collard Co. Figure 4?Flanging fire door shown in Plate 3. 90 Flanging. shows the back head flanged in opposite directions. Theouter portion of the flange is the first operation, then thesheet is reheated and placed in the dies as shown in , when the fire doors are flanged one at a time bythe die A. The press here shown has a top cylinder and. Figure fire door shown in Plate 3. this cylinder is provided with an adjustment along theline radially from the center. The operation would bejust the reverse of this, in case the machine we wereusing was not provided with a top cylinder. In this caseit would be flanged by the clamping piston referred to in 91 Flanging. Fig. 45, where the piston R forces the die completelythrough the fire door. The die A is now received by thepiston P. The key K is withdrawn and the piston R re-turns to place. The table is lowered and the sheet re-moved. In flanging very heavy sheets and especially whenthe flange is deep as is the case in the throat sheet ofPlate 3, an exceedingly severe strain is brought upon thedies. There is something of the action of a wedge uponthese dies just before the flange is nearly complete. Asthe metal is very soft at this heat, there will not be nearas much friction as there would be if the metal were cold,consequently the wedging action is more severe. Thedie
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
