Engineering support of performance characteristics of high-reliability products parts

The paper deal with the methods used to assign cutting technological conditions providing the set-up parameters of surface layer quality in the cutting operation and used in the calculation estimation of the indices of product performance characteristics based on certain parameters of surface layer quality and cutting conditions. There is the necessity for critical machine parts to provide the required performance characteristics determined both through the part precision parameters and through their surface layer quality (roughness, degree and depth of cold working, and the value and sign of residual stresses). In such cases, it is necessary to provide the complex parameters that characterize the surface layer along with the specified machining accuracy. For this propose, the methods and appropriate software have been developed that enables one to define the correlation between the machining conditions and the surface layer quality parameters, including cutting accuracy, properties of the cutter and work stock materials, technological system rigidity, the part`s dimensions.