 | William Cawthorne Unwin - 1877 - 360 pages
...the compression at the moment of punching. With very soft, ductile iron plates, it is believed that the injury done in punching is comparatively small, if the punch is sharp, and the hole in the die block not too large. But, with steely iron or steel plates, the injury is serious,... | |
 | William Cawthorne Unwin - 1877 - 352 pages
...the compression at the moment of punching. With very soft, ductile iron plates, it is believed that the injury done in punching is comparatively small, if the punch is sharp, and the hole in the die block not too large. But, with steely iron or steel plates, the injury is serious,... | |
 | William Cawthorne Unwin - 1882 - 550 pages
...flow of the material, at the moment of punching. With very soft, ductile plates, it is believed that the injury done in punching is comparatively small,...beyond its limit of elasticity, and thus altering its homogeneous character and power of equal elongation under strain. The metal near the hole becomes more... | |
 | Henry O'Connor - 1901 - 498 pages
...ductile plates, it is believed that the injury done in punching is comparatively small if the punch be sharp. But with rigid plates the injury is apparently serious, the plates being weakened 15 per cent, to 30 per cent. (Dnwin.) To fill up the hole and form a bead, from 1-3 to 1-7 times the diameter... | |
 | Henry O'Connor - 1928 - 474 pages
...ductile plates, it is believed that the injury done in punching is comparatively small if the punch be sharp. But with rigid plates the injury is apparently serious, the plates being weakened 15 per cent, to 30 per cent. (Dnwin.) To fill up the hole and form a head, from 1-3 to 1-7 times the diameter... | |
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... sharp. But, with rigid plates, the injury is apparently serious, the plates being weakened 15 to 30 per cent. The injury is due, not to cracks formed in the plate, but to the pressure straining it beyond its limit of elasticity, and thus altering... 