Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 286
s it up into the shell shownin Fig. 467 at the same stroke. In descending theblank is cut by the edge of the blanking punch B,meetinor the edg-e of the blanking die A. The blank continues until the drawing punch C is drawn downon the drawing die D, when the blank is drawn intothe required shape.… … Fig. 470. is then held firmly by the blank holder ring E andis forced down together with it, by continued down-ward motion of the blanking punch B. The blankholder ring is forced up by the elastic force of the rub-ber spring barrel R upon which the ring sets, throughthe medium of six pins passing…
Mechanical drawing · Machine design
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