The practical metal-worker's assistant : containing the arts of working all metals and alloys, forging of iron and steel, hardening and tempering, melting and mixing, casting and founding, works in sheet metal, the processes dependent on the ductility of the metals, soldering, and the most improved processes, and tools employed by metal-workers, with the application of the art of electro-metallurgy to manufacturing processes : collected from original sources, and from the works of Holtzapffel, Bergeron, Leupold, Plumier, Napier, and others ... (1851)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 207
202 WORKS IN SHEET METAL, MADE BY RAISING. pieces, each to serve for one ring, and these are spun into shapealmost in an instant, between the arbor and the milling tool or roller,as seen in the front view, Fig. 198; it is clear that unless the arbor Figs. 197. 198. … were smaller than the work, the latter from being undercut could notbe released: sometimes only one broad milling tool is employed, atother times two or more narrow ones. This process is most distinctlya modification of two rollers, which travel by surface-contact insteadof by toothed wheels, and…
Metal-work · Electrometallurgy · Metallurgy
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