On the basis of literature date it is proved, that technological dimensions of purveyance, defined with maximum-minimum method and graphs theory, often exceed dimensions that calculated by engineers-technologist according to working drawings. It results in increasing of material capacity and cost price of mechanical treatment purveyance, and it requires alterations corrections in methods of calculation dimensional chains with the purpose of minimizing labor-consuming character in its practical use.
точность обработки, размерные цепи, припуски на обработку, Precise treatment, dimensional chains, treatment allowances
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