Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . fthe blows should be as near equal as possible. Another and a more important reason, however, isthat the effect of the pening does not penetrate deeply; and if much of the pened surface is re-moved, the effects of the pening will be also removed; for, as a rule, the immediate effects of theblows do not penetrate deeper than about one-thirty-second of an inch. While the work is beingpened, it should be rested upon a wood or a lead block, and held so that the part struck is supportedas m
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . fthe blows should be as near equal as possible. Another and a more important reason, however, isthat the effect of the pening does not penetrate deeply; and if much of the pened surface is re-moved, the effects of the pening will be also removed; for, as a rule, the immediate effects of theblows do not penetrate deeper than about one-thirty-second of an inch. While the work is beingpened, it should be rested upon a wood or a lead block, and held so that the part struck is supportedas much as possible by the block. In no case should it be rested upon an iron or any hard-metalblock, as that would tend to stretch the under face, and partially nullify the effects of the pening. In straightening work of cast-iron, pening bears an important part, especially in the case of ironpatterns or light iron castings. Suppose, for example, that Fig. 2265 represents an iron casting, and 2266. 0 0 B 0 0 0 0 0 o 0 0 0 0 0 0 o 0 0 0 0 0 0 0 o D 0 A 0 F, 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o O 0 0. that the distance A from the centre of one double eye to that of the other was too short; by peningthe arms on the faces denoted by B, C, and in the place denoted by B, the distance A could easilybe made correct. If the width at A were too great, similar pening at C, D would be skill demanded in the straightening processes consists not so much in delivering the blows as HAMMERS, POWER. 85
Size: 1986px × 1258px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
