Handbook for machine designers, shop men and draftsmen (1916)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 373
e within the limit of the presS; formula (d) may beinverted thus: P cot « = ■Sis ie) When closed cutting dies are used, for instance, a round blankingdie, it is customary for practical reasons to give the die (or punch)several high points, and the question arises: How does the numberof cutting… … Fig. 22.—Cutting capacity of power presses. While the cutting length of which a press is capable may beobtained from these formulas, another factor has also to be takeninto consideration. The pressure required to force the knife or diethrough the material must not exceed a certain maximum which…
Machine design
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