INVESTIGATION OF THE FACTORS AFFECTING THE VALUE OF A BARREL-SHAPED FOR TURNING NON-RIGID BLANKS
The article is devoted to research of the factors influencing on formation of a deviation of a profile of longitudinal section from set by drawing when turning nonrigid blanks – barrel shape. Researching phases are presented in the IDEF0 diagram. The considered deviation is defined under working environments and compared with the results of calculations executed in the OptimRez program developed by authors. Reproducibility of experiments in working environments is estimated by Kokhren’s criterion. Researching results of influence of factors are presented in a graphic and tabular form. It is revealed that values of barrel shape are defined in the seventh control point located at distance of 70 % of length of the processed surface of fixing of blank in the boss. It is determinate that for blanks from considered steels influence of change of the module of elasticity on barrel shape is insignificant. The main factors are force of cutting and the relation of blank diameter to length of the processed surface. It is revealed that at the recommended cutting parameters for a plate from a firm alloy cutting depth has the greatest impact. Conditions are defined, at which for increase of accuracy of turning effectively entering of correction into the operating program of the machine with CNC.