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Home > Biographies & Memoire > Biography and non-fiction prose > Anthologies: general > Essentials of Sheet Metal Work and Pattern Drafting; An Elementary and Advanced Course for Vocational and Trade Students and Apprentices; Also for She
Essentials of Sheet Metal Work and Pattern Drafting; An Elementary and Advanced Course for Vocational and Trade Students and Apprentices; Also for She

Essentials of Sheet Metal Work and Pattern Drafting; An Elementary and Advanced Course for Vocational and Trade Students and Apprentices; Also for She


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...Pail Cover.--Having the pail cover E, Figure 84, cut from metal, we are now ready for the raising process. First, hammer a circular depression 314 inches in diameter and % inch deep in the top of a lead block. Next, place the flat disc of metal over the depression in the block, in the position shown at 1, Figure 85, and with the raising hammer strike blows all around the edge of the circle, hammering out any wrinkles that may form during the operation. This will raise the metal to the shape shown at 2. Then, with the cover in the position shown in 3, strike another course of blows around inside of the first course. Continue this process until the cover is brought to the shape shown at 4. The center is then raised by striking light blows with the hammer while holding the cover in the position shown at 5. This completes the operation, as shown at 6. When raising covers made from light material, two or more of them can be placed together and raised at the same time. Turning Machine.--Figure 86 shows a turning machine, better known to the sheet metal worker as the "thick edge." These machines are furnished with rolls of different thickness, suitable for a large variety of work, and are well adapted for turning edges on heavy material, preparing the edges of flaring articles for wiring, edging pieced elbows, and making a depression or bead on the metal when marking the width of a flange to be turned on a cylinder or cover. Flanging the Cover.--After the cover has been hammered or raised into shape, it will be necessary to turn a wide edge or flange on the rim, to allow for joining the hoop and cover by means of a single seam shown at A, Figure 84. The first step in flanging is to set the gauge on the turning machine (Figure 86) about % inch from the ed...


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Product Details
  • ISBN-13: 9781231668764
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 28
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1231668768
  • Publisher Date: 14 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 68 gr


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Essentials of Sheet Metal Work and Pattern Drafting; An Elementary and Advanced Course for Vocational and Trade Students and Apprentices; Also for She
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