Transactions of the New York Electrical Society Volume 3-13

Transactions of the New York Electrical Society Volume 3-13

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ...3,5 Cast Iron..................... 1.0 1.3 These figures are the result of a series of tests conducted by the Franklin Institute and represent the facts as nearly as they could be determined. There are now a number of makes of steel in the market treated along the lines explained above, which give equally as good results. An exact knowledge of the cutting speeds of which these tools will permit when machining different materials, and the power to pull various cuts under all conditions, are absolutely essential if we wish to properly design machine tools, or use them to their full capabilities in actual service. The value of this information is now being realized by several of the machine tool builders, and the results are already being felt in the shop in the form of much more efficient machine tools. The motor drive makes the measurement of power so simple that we may arrive at these results with comparatively little difficulty. We have recently conducted in the shops of our clients, the Link-Belt Engineering Company, a series of experiments to determine the best air-hardening tool steel for use on cast iron, Fig. 3, showing the testing lathe and necessary accessories. This particular lathe, which I will describe later, gives I26 spindle speeds, increasing in 5 per cent. increments, and is especially adapted to this work. The electrical instruments on the left give a record of the energy absorbed and the cutting speeds were carefully determined by suitable instruments. Fig. 4 is a portion of a record and shows our method of tabulating this data. One hundred and twenty-five (I25) tests on various tools were made in this series of experiments, the depth of cut and feed being kept constant and the speed varied so that the tool would more

Product details

  • Paperback
  • 189 x 246 x 3mm | 113g
  • United States
  • English
  • black & white illustrations
  • 1236882970
  • 9781236882974