Study on model for cutting force when milling SCM440 steel

Keywords: SCM440 steel milling, Cutting force, Box-Cox transformation, Johnson transformation, t-test

Abstract

This article presents empirical study results when milling SCM440 steel. The cutting insert to be used was a TiN coated cutting insert with tool tip radius of 0.5 mm. Experimental process was carried out with 18 experiments according to Box-Behnken matrix, in which cutting speed, feed rate and cutting depth were selected as the input parameters of each experiment. In addition, cutting force was selected as the output parameter. Analysis of experimental results has determined the influence of the input parameters as well as the interaction between them on the output parameters. From the experimental results, a regression model showing the relationship between cutting force and input parameters was built. Box-Cox and Johnson data transformations were applied to construct two other models of cutting force. These three regression models were used to predict cutting force and compare with experimental results. Using parameters including coefficient of determination (R-Sq), adjusted coefficient of determination (R-Sq(adj)) and percentage mean absolute error (% MAE) between the results predicted by the models and the experimental results are the criteria to compare the accuracy of the cutting force models. The results have determined that the two models using two data transformations have higher accuracy than model not using two data transformations. A comparison of the model using the Box-Cox transformation and the model using the Johnson transformation was made with a t-test. The results confirmed that these two models have equal accuracy. Finally, the development direction for the next study is mentioned in this article

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Author Biographies

Nguyen Van Thien, Hanoi University of Industry

Faculty of Mechanical Engineering

Do Duc Trung, Hanoi University of Industry

Faculty of Mechanical Engineering

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Published
2021-09-13
How to Cite
Thien, N. V., & Trung, D. D. (2021). Study on model for cutting force when milling SCM440 steel. EUREKA: Physics and Engineering, (5), 23-35. https://doi.org/10.21303/2461-4262.2021.001743
Section
Engineering

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