. Railway mechanical engineer . A B c ;d E i i sSy. I SS I Tool Which Cuts and Chamfers Holes In Flue Sheets parts of the collar in front of the tools are cut away. Thecollar thus supports the tools, so that there can be no pivotchattering. Two tools, set at diametrically opposite points and shapedas shown in the dotted lines, cut the hole through the sheetand the other tools chamfer the edge to a radius of 1/16 in. SOME ARC WELDING INFORMATION*II BY F. G. SAUSSUREt Perhaps no other machine tool of recent years has madesuch a great impression upon the mechanical world as hastlie electric welde
. Railway mechanical engineer . A B c ;d E i i sSy. I SS I Tool Which Cuts and Chamfers Holes In Flue Sheets parts of the collar in front of the tools are cut away. Thecollar thus supports the tools, so that there can be no pivotchattering. Two tools, set at diametrically opposite points and shapedas shown in the dotted lines, cut the hole through the sheetand the other tools chamfer the edge to a radius of 1/16 in. SOME ARC WELDING INFORMATION*II BY F. G. SAUSSUREt Perhaps no other machine tool of recent years has madesuch a great impression upon the mechanical world as hastlie electric welder, and there are few men engaged in therepair or manufacture of iron or steel commodities who arenot more or less familiar with its use. De Meritus, in 1881, seems to have been the first tO. Fig. 1—A 6-ln. by 8-ln. Frame Section Prepared for Arc Welding employ the electric arc for welding, but little is known of his-experiments except that a carbon electrode was used. TheBenardos carbon electrode process was a later developmentand is still employed for certain classes of work. The carbon electrode process has the disadvantage thatcarbon is deposited in the welds, therefore little, if any,macliining can be done because of hard and brittle this, the work is limited to a downward position
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
