Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 429
ree the latterand pass the blank.^ The punching-presses may be crank-presses as shown, or the punch may be driven by hydraulic * Usually larger by y\j the diameter of the punch. 392 MECHANICAL ENGINEERING OF POWER PLANTS. pressure. Flanged plates are usually punched in horizontalpunching-presses. A… … Fig. 325. Fig. 326. Drilling of plate is done by the ordinary machine-shopdrill of two cutting planes meeting at an edge. Twist-drillsare most convenient, although the flat drill is still to be met.The drill will be run by the ordinary drill-press. The gang-punch or multiple punch has a number…
Mechanical engineering · Steam power plants
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