Pattern Making
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In our eReader you can find the full English version of the book. Read Pattern Making Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Pattern Making
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However, it is not possible to accurately figure the contraction or shrinkage of metal, as a thick casting will shrink more than a thin one. Some shapes shrink more than others or more in some parts of the same piece than in other parts. A large cylinder, if cast on end, will shrink more at the bottom than at the top. Castings are calculated to shrink from one- tenth to one-eighth of an inch to the foot; but, as nearly all machine castings are either turned or planed to an accurate size, the de...termina- tion of the exact amount of shrinkage is in a great measure immaterial. Then again, in cases where the moulder raps the pat- tern heavily, in order to withdraw it from the sand, the casting will show but little if any shrinkage.
The lathe is perhaps the most important of all the pattern maker's tools. A lathe suitable for ordinary pattern work should have a swing of at least twelve inches over the bed and it should be 54 PATTERN MAKING so arranged as to allow a face plate for work of large size to be swung off over the end of the bed, as shown in cross-section in Fig.
What to read after Pattern Making?
You can find similar books in the "Read Also" column, or choose other free books by Agnes K Agnes Keith Hanna to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
However, it is not possible to accurately figure the contraction or shrinkage of metal, as a thick casting will shrink more than a thin one. Some shapes shrink more than others or more in some parts of the same piece than in other parts. A large cylinder, if cast on end, will shrink more at the bottom than at the top. Castings are calculated to shrink from one- tenth to one-eighth of an inch to the foot; but, as nearly all machine castings are either turned or planed to an accurate size, the de...termina- tion of the exact amount of shrinkage is in a great measure immaterial. Then again, in cases where the moulder raps the pat- tern heavily, in order to withdraw it from the sand, the casting will show but little if any shrinkage.
The lathe is perhaps the most important of all the pattern maker's tools. A lathe suitable for ordinary pattern work should have a swing of at least twelve inches over the bed and it should be 54 PATTERN MAKING so arranged as to allow a face plate for work of large size to be swung off over the end of the bed, as shown in cross-section in Fig.
What to read after Pattern Making?
You can find similar books in the "Read Also" column, or choose other free books by Agnes K Agnes Keith Hanna to read onlineMoreLess
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