Dunkerley, Stanley, 1870- · London, New York [etc.] Longmans, Green · leaf 380
a shearing machine, three requirements oughtto be satisfied, namely, (1) whilst cutting, the motion of the punchor knife should be slow and uniform ; (2) during the return strokeits motion should be quick; and (3) between the end of one strokeand the beginning of the next, the punch or knife should… … Fio. 410. punching machine. The frame of the machine is denoted by F,the shaft to which the cam plate L is attached by Pi, and thecentre about which the arm oscillates by Pa. The punch isattached to the lower end of a guide bar, which in turn is connectedto the shorter arm of the rocking lever by…
Machinery, Kinematics of
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