STUDIES REGARDING THE DETERMINATION OF THE ADEQUATE ASSEMBLY TOLERANCES DEPENDING ON THE MANUFACTURING COSTS OF THE PARTS PROCESSED ON CLASSIC MACHINE TOOLS

The paper deals with a study case regarding the determination of adequate assembly tolerances. The study concerned the assembly of two bearings on an axle. Determining the adequate tolerances of the sizes chains is based on Lagrange’s multipliers use. The optimization criterion for determining the assembly tolerances is the minimization of the product achievement cost. The relation between tolerances and cost will be revealed in a graphic componen

THE SOLUTION OF THE ALGORITHM FOR SOLVING THE DIMENSIONAL CHAINS DURING THE DESIGNING COURSE

The methodology of solving the designing problems and calculus formulasdependent upon the way of showing the sourcing data and the required results of the calculus. Thegiven operative dimensional chain is made up of three primary constitutive elements, respectivelyof the closing element. When solving the designing problem the rated size of the determinativeelement shall be circled and checked up, without exceeding the limit values of the calculus of theclosing element, since they are its regulating values. As a result solving the size chain nthe ratedvalue of the constitutive element shall be found out. At such a rated value, the closing elementshall be made up within the regulating limits of the reserve on the lower, respectively upperlimits. If the reserve on the tolerance of the closing element ist else than zero, then the output ofthe actual values of the closing elements on the settled limits cannot be avoided. If the reserve onthe tolerance of the closing element ist equal withn zero, then the rounding off of the rateddetermined value of this chain could not be possible

ASPECTS CONCERNING THE IMPLEMENTATION OF A METHODOLOGY FOR DETERMINING THE COLUMNS DIAMETERS OF GUIDING A PRESE - (Part I)

In this paper we present a methodology for determining the value of the diameters of the guide column of a press which has a construction with closed frame. For determining these values is necessary to go through several stages namely: the simplified representation of the press, the representation the forces requesting the four columns, the determination the values these forces, the determination of maximum bending moment, and finally. by obtaining a determined static system and using the Mohr-Maxwell and rule Veresceaghincan get columns diameter values