. Forging of iron and steel, a text book for the use of students in colleges, secondary schools and the shop . Fig. 114 a i is necessary to punch or to drill a small hole at the place that will be the end of the split. In Fig. 115 (a) shows the hole and the dotted line is where the piece is to be split. Light pieces are most easily split in a vise with 78 FORGING OF IRON AND STEEL. an ordinary cold chisel, as shown in Fig. 116. The pieceis set in the vise, so that the place selected for the splitis flush with the top of the jaws, thecutting edge of the chisel being heldon the top of the vise,
. Forging of iron and steel, a text book for the use of students in colleges, secondary schools and the shop . Fig. 114 a i is necessary to punch or to drill a small hole at the place that will be the end of the split. In Fig. 115 (a) shows the hole and the dotted line is where the piece is to be split. Light pieces are most easily split in a vise with 78 FORGING OF IRON AND STEEL. an ordinary cold chisel, as shown in Fig. 116. The pieceis set in the vise, so that the place selected for the splitis flush with the top of the jaws, thecutting edge of the chisel being heldon the top of the vise, and drivenwith the hammer against the work,so that the back jaw of the vise andthe chisel act as shear blades to cut orsplit the stock. The method ofsplitting with a hack saw is thesame as that of ripping a boardheld in a vise. With reference toFig. 117, no further explanation isFig. 116 necessary. PUNCHING Punching is an important operation in the forge shop,though the introduction of the drill press has lessenedits use somewhat. There aremany cases where the punch isdesirable, as in punching eyesfor hammer handles. There areboth hand and power puncheswhich will make holes of almostany section. Power Punch. — The operationof the power punch is very piece to be punched is heldunder the punch and a leverpressed down with the foot. Thisthrows a clutch which start
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
