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We have considered the issues of how structural characteristics of grinding discs influence the roughness of the processed workpiece surfaces. The analysis of the known research about dependences of roughness parameters of polished surfaces on the disc grit, hardness and structure has been given. The technique to determine the optimum disc hardness which is boundary on the maximum value of the roughness parameter has been demonstrated. The functional dependences of the roughness parameter R a on the disc structure characteristics, the cutting mode and the processing conditions have been established for flat, round external and cutin grinding.

Here, are considered the known papers on technological quality assurance of parts surfaces in abrasive processing. The analysis of these research and the issues raised have shown that the solution of tasks related to improvement of the surface layer quality, accuracy, and durability of parts is an actual and promising direction for further research. The basic ways of the decision of a problem of improvement of the part processed surfaces quality are defined. The general disadvantages of the existing empirical dependencies for determining the roughness in different methods and conditions of grinding of the parts surfaces are noted.Keywords Technological support Á Quality of the treated surfaces Grinding Á Parts IntroductionIn the manufacturing technology of parts for various purposes, abrasive methods are widely used to improve their quality of the surface layer. The abrasive treatment is, in most cases, the final stage of parts manufacturing. The purpose of such treatment is to impart the desired performance properties (PP) to the treated surface, which are, in large part, determined by geometric and physical and mechanical parameters. These parameters include, first of all, roughness, microhardness, and residual stresses of the surface layer.

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