Factory and Industrial Management Volume 56, No. 4

Factory and Industrial Management Volume 56, No. 4

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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. 1918 edition. Excerpt: ...the tolerances on all the other dimensions. Another application is that when a dimension is obtained by several independent cuts, the limits given to these cuts must be such that the sum of their tolerances is equal to or less than the allowable tolerance on the resultant dimension. Rule 3. The amount of stock left by a roughing cut for removal by a finishing cut is never a definite amount, but a variable with a possible range equal to the sum of the tolerances of the rough and the finish cuts. Possible modifications of these rules are legion, yet practically all gaging problems can be solved by the application of these three. These in turn are all based on one great principle, namely, "whenever a dimension is determined by two or more elements, it is subject to a variation equal to the sum of the variations of all the elements concerned." The importance of gaging has long been recognized in this country. With the war has come the need of not only making duplicate parts, but of mak ing them in accordance with prescribed limits and specifications. The experiences of the last few years have brought home to most manufacturers of machine-shop products a realization of the difficulties attendant upon analyzing these requirements; establishing the locating points and sequence of operations; and designing gages to control in the actual work the methods determined in the drafting and engineering departments. Only by completely controlling each operation through the correct use of proper gages can manufacturing difficulties be localized and the full talent of the organization employed to overcome them and facilitate production to the fullest extent. Idle Time of Equipment is the Great Obstacle to Economical Handling and Transportation By...
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Product details

  • Paperback | 128 pages
  • 189 x 246 x 7mm | 240g
  • United States
  • English
  • black & white illustrations
  • 1236822544
  • 9781236822543