. Metal spinning . Fig. 20. German SilverReflector Fig. 21. Open Hearth Cold-rolled Steel Shell of 6*4 inches. This shell was spun without annealing, which showsthe extreme ductility of aluminum. The copper shell shown in , has a maximum diameter of 7 inches, and a depth of 8 inches;it was spun with four annealings. A German silver reflector, whichis 10 inches in diameter at the largest end and 5 inches deep, is shownin Fig. 20. The spinning of such a reflector, when made from thismaterial, is quite difficult. An open hearth cold-rolled steel shell with TOOLS AND METHODS 21 a maximum dia
. Metal spinning . Fig. 20. German SilverReflector Fig. 21. Open Hearth Cold-rolled Steel Shell of 6*4 inches. This shell was spun without annealing, which showsthe extreme ductility of aluminum. The copper shell shown in , has a maximum diameter of 7 inches, and a depth of 8 inches;it was spun with four annealings. A German silver reflector, whichis 10 inches in diameter at the largest end and 5 inches deep, is shownin Fig. 20. The spinning of such a reflector, when made from thismaterial, is quite difficult. An open hearth cold-rolled steel shell with TOOLS AND METHODS 21 a maximum diameter of 3 inches and a depth of 4 inches is shown inFig. 21. This shell was spun without annealing, which shows that thegrade of steel used is well adapted for this work. In Fig. 22 two finished brass shells are shown to the right, and alsothe number of operations required to change the form of the upper shell is 6 inches long and 3% inches in diameter at the. Fig. 22. Various Steps in Spinning the Two Brass Shells at the Right large end, while the lower one is 7^4 inches long by 3% inches indiameter. It was necessary to anneal these shells between eachoperation, the upper shell being annealed four times and the lowerone three times. These pieces were made in quantities sufficient to war-rant the making of chucks for each operation, which enabled them tobe spun with less skill than would be required if a finishing chuck
Size: 2045px × 1221px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidmetalspinnin, bookyear1912
