Transactions Volume 18-19

Transactions Volume 18-19

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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. 1910 edition. Excerpt: ...and the methods of using graduated heads. tables, etc. The difierence between patternmaking with the VVadkin machine and by hand is exactly the same as the difference between toolmaking by hand methods and toolmaking by highly specialized machinery. In Fig. 7 there is shown also behind the machine a cylindrical pattern which has bosses and other irregularities on the back side so that it could not be turned in the lathe. The cylindrical portion of this was turned out on the VVadkin machine in very short order by simply securing segments which had been sawed to a true circle to the ends of the pattern and allowing these to rotate in suitable bearings or saddles. In this way the work was rotated past the cutter and the circle easily cut. For handling round work or curved work a great variety of devices have been brought out. In Fig. 8 is shown the jig or radius fixture for curved work. This consists of an extension table which is clamped to the regular table. To this extension table there is attached a vertical spindle A. This spindle is so adjusted that the distance from the center of the spindle to the cutter represents the radius of the work to be turnedout, and the work is then mounted on the spindle by means of suitable iron straps or brackets carrying bearings that fit the spindle. W' here the work is of considerable width the auxiliary-horses shown on each side of the machine are used for supporting the outer portion of the work as it is rotated past Fig. 9. Special Cutter-head for Large the cuttel-_ AS the extension Core-boxes. table IS clamped securely to the regular table of the machine it can be fed in or out, thus increasing or decreasing the distance from the spindle A to the cutter by means of the cross feed attached to...show more

Product details

  • Paperback | 198 pages
  • 189 x 246 x 11mm | 363g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236854586
  • 9781236854582