The advanced machinist; a practical and educational treatise, with illustrations (1903)
Hawkins, Nehemiah, 1833- · New York, T. Audel · leaf 234
eupper and lower blades of a shearing machine, as shown infig. 249; the blades are not cutting edges, but are flat ornearly so. The operations of both punching and shearing may beregarded as similar, one being done with circular or curvedand the other with straight tools. The blades of a shear- The… … Fig. 250. Fig. 251 shows an enlarged view of the arrangement ofthe punch end of the machine illustrated in fig. 248; theoperation is that of perforating a hole in a heavy plate; 232 The Advanced Machinist. PUNCHING AND SHEARING. each portion is named, to more readily convey the idea ofthe work and…
Machine-tools · Machine-shop practice
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