Actual Problems in Machine Building 2020 Vol. 7 No. 1-2

Actual Problems in Machine Building. Vol. 7. N 1-2. 2020 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 76 ENSURING THE ACCURACY OF MANUFACTURING THE BASE HOLES OF THIN-WALLED BODY PARTS Firsov A.M., Ph.D. (Engineering), Associate Professor, e-mail: tmk@bti.secna.ru Ovcharenko A.G., D.Sc. (Engineering), Professor, e-mail: tmk@bti.secna.ru Smirnov V.V., Ph.D. (Engineering), Associate Professor, e-mail: tmk@bti.secna.ru Romashev A.N ., Ph.D. (Engineering), Associate Professor, e-mail: tmk@bti.secna.ru Biysk Technological Institute, Branch of Polzunov Altai State Technical University, 27 Trafimova st., Biysk, Altai region, 659305, Russian Federation Abstract The article analyzes the reasons for the formation of deviations in the size and shape of holes of body parts with thin walls of variable thickness. The main factors affecting these deviations are identified. An approach is proposed to determine the size and shape of hole deviations, taking into account the elastic and thermal deformations of the elements of the technological system. Dependencies are obtained that can be used as an integral part of information support for CAPP for mechanical processing of body parts with thin walls of variable thickness. Keywords thin-walled body part, base hole, accuracy, size and shape deviation, elastic deformations, thermal deformations, CAPP, information support.