. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of thecup was slightly cooled by immersion toa depth of 787 in. to in. in a tankof water maintained at a constant the same time, the bottom of the cupwas freed of scale by means of a kind ofmilling cutter worked by a small portable drilling machine driven by compressedair, suspended from a jib and maintainedat the right level by a counterweight. Thecup-cooling was so deviwater-harden the metal It imparted to itsufficient resistance to prevent the punchfrom driving through the b
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of thecup was slightly cooled by immersion toa depth of 787 in. to in. in a tankof water maintained at a constant the same time, the bottom of the cupwas freed of scale by means of a kind ofmilling cutter worked by a small portable drilling machine driven by compressedair, suspended from a jib and maintainedat the right level by a counterweight. Thecup-cooling was so deviwater-harden the metal It imparted to itsufficient resistance to prevent the punchfrom driving through the base of the the cup was being made ready, theman in charge of tl inserted the larger die after having greased it; hisassistant then placed the bast of the cup in the die, ill opened and the punch drove the cupIgh the die. it was removed and replaced on thepunch when the piston was in the rearposition. During the time occupied in thisthe man in charge of the punching oper-ations replaced the first die by a similarsecond one, when the drawing down con-tinued in practically the same way, the.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
