Platers' Guide Volume 18

Platers' Guide Volume 18

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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. 1922 edition. Excerpt: ...to its physical qualities. However, it is recognized that the brass foundry has a joint interest in the subject; it is responsible for the alloy used, which is important. The reason for presenting this subject is that foundrymen will be interested in a comparison in the quality of castings and forgings. As far as is known by the writer, no record is available to show when brass forgings were first produced. Older text books on engineering materials generally state that brass can be cast and rolled, but can be forged only with difliculty or not at all. It is generally known, however. the the process was greatly developed on this continent during the late war, and was a reliable means of meetiug the rigid specifications covering small brass parts for munitions. Since the close of the war much progress has been made in the application of this process in the production of standard commercial parts. Brass forgings are produced by squeezing or extruding a heated billet between closed or partly closed dies opcrated by presses of varying construction, according to the design of the piece being produced. It is possible to forge some simple parts in ordinary single acting crank presses, while other parts require double-acting presses with closed dies. In some designs hydraulic presses are advisable. At the gating and pouring of each new casting is a problem in itself to the foundryman, so the production of each brass forging must be considered separately. After considerable experience it is found that they can be classified and the rules applying to the class to which the forging belongs can be applied. The best way to secure a blank or billet for a brass forging is to cut them from extruded rods as it is most desirable to use a scalped blank, and...show more

Product details

  • Paperback
  • 189 x 246 x 18mm | 590g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236948254
  • 9781236948250