OBRABOTKAMETALLOV TECHNOLOGY Vol. 24 No. 2 2022 a b Fig. 6. Round diagrams of the shape deviation distribution of the verifi cation sections: a – section No.1; b – section No.4 Fig. 7. Combined diagram of the contours of the sections and the inscribed cylinder: a – plot of the graph in the region of the minimum error in the shape of the surface; b – plot of the graph in the region of the maximum error in the shape of the surface a b It follows from the data analysis that section No.1 has the smallest value of the parameter 1 ECR , as well as 1 TFEC . At the same time, section No.2 has one of the smallest shape errors. Thus, according to the proposed processing scheme, a surface area from section No.1 to section No.2 is taken as a possible surface
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