Actual Problems in Machine Building 2021 Vol.8 N3-4

Actual Problems in Machine Building. Vol. 8. N 3-4. 2021 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 40 15. Jahan-Shahi H., Shayan E., Masood S.H. Multivalued fuzzy sets in cost/time estimation of flat plate processing // International Journal of Advanced Manufacturing Technology. – 2001. – Vol. 17, iss. 10. – P. 751–759. – DOI: 10.1007/s001700170121. 16. Evaluation method of machine hour of part based on case-based reasoning and SML / Q.H. Yang, G.N. Qi, Z.R. Huang, K.Q. Zheng // Chinese Journal of Mechanical Engineering. – 2007. – Vol. 43, iss. 5. – P. 99–105. – DOI: 10.3901/JME.2007.05.099. 17. A study on the development of man2hour ratio based on artificial neural networks / L.X. Zhu, J.T. Zhou, J.J. Gao, S.S. Zhang // Mechanical Science and Technology. – 2004. – Vol. 23, iss. 6. – P.702–747. PRELIMINARY ESTIMATE OF THE MACHINING TIME IN PRESSWORK TOOLING PRODUCTION ON CNC MACHINES Isachenko A. S. , Ph.D. (Engineering), Associate professor, e-mail: isachenko.alexey.irk@gmail.com Stolyarenko D. I. , Undergraduate student, e-mail: stolyarenko.danya@bk.ru Irkutsk National Research Technical University, 83, Lermontov St., Irkutsk, 664074, Russian Federation Abstract One of the aspects of manufacturing presswork tooling using CNC machines is a frequent need of workshop schedule adjustment due to fast tracking a high-priority part, which machining time is unknown. Traditional machining time estimation methods either cannot be applied or provide inadequate accuracy due to considering such parameters as the design’s geometrical features and the machine’s dynamic characteristics as negligible. Authors propose a preliminary method of machining time estimation based on material removal rates. To approximate the calculated values to the actual values, an experiment was conducted to deduce coefficients that take the aforementioned factors in account. Usage of this method allowed preliminarily estimating the presswork tooling machining time for workshop rescheduling in the span of a single minute. Keywords machining time, material removal rate, workshop scheduling, machining time estimation