[ Technical Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 1, pp.74-81

ISSN: 2508-5107 (Online)

Print publication date 15 Feb 2020

Received 29 Sep 2019 Revised 09 Dec 2019 Accepted 23 Dec 2019

DOI: https://doi.org/10.7735/ksmte.2020.29.1.74

항공기 Bulkhead의 Chord와 Side Fitting 부품의 밀링 가공 및 변형에 관한 연구

김도혁^a ; 정윤교^a ; 모용선^b ; 조영태^a^{, *}

Cutting Characteristics and Deformation Analysis for Chord and Side Fitting Parts in an Aircraft Bulkhead

Do Hyeog Kim^a ; Yoon Gyo Jung^a ; Yong-Seon Mo^b ; Young Tae Cho^a^{, *}

aDepartment of Mechanical Engineering, Changwon National University
bNDT Engineering&Aerospace Co. Ltd.

Correspondence to: ^*Tel.: +82-55-213-3608 E-mail address: ytcho@changwon.ac.kr (Young Tae Cho).

Abstract

Among bulkhead components (the structure that maintains the rigidity of an aircraft body), the chord (which supports the shear load between the surrounding structure and the web) and the side fitting (which connects and vertically reinforces the body and web) are titanium alloy parts with a high aspect ratio. These parts occupy the critical load path position of the aircraft and are required for large one-piece construction. This study verifies the milling process and deformation of the chord and side fitting. First, the milling characteristics of the Ti–6Al–4V alloy were simulated and the simulated cutting resistance was verified via comparison with experimental result. Next, the effects of the milling conditions on Ti–6Al–4V cutting resistance and cutting temperature were determined in a Taguchi analysis of the signal-to-noise ratio and variance. Finally, the deformation degrees of the BL0 chord and side fitting were determined using the simulated cutting resistance and cutting temperature.

Keywords:

Cutting characteristics, Simulation, Deformation analysis, Large titanium parts, Design of experiment

Acknowledgments

본 연구는 과학기술정보통신부 및 정보통신기술진흥센터의 Grand ICT연구센터지원사업(IITP-2019-2016-0-00318) 및 산업통상자원부의 항공우주부품기술 개발 사업(10057941)과 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구결과임(No. 2019R1A5A808320111). 또한 본 연구는 창원대학교 내 스마트제조기술센터의 지원을 받아 수행되었음.

References

Ezugwu, E. O., Bonney, J., Yamane, Y., 2003, An Overview of the Machinability of Aeroengine Alloys, Journal of Materials Processing Technology, 134 223-253. [https://doi.org/10.1016/S0924-0136(02)01042-7]
Marcel, K., Tomas, V., Vladimir, S., Martin, N., 2017, Influence of Ultrasonic Assistance on Delamination during Machining of Different Composite Materials, Proceedings of the 28th DAAAM International Symposium, 392-399.
Kim, G. H., 2013, A Study on Characteristics of Cutting by Cutting Conditions in Titanium Machining, Journal of the Korean Society of Manufacturing Process Engineers, 12:1 84-89.
Abele, E., Frohlich, B., 2008, High Speed Milling of Titanium Alloys, Advances in Production Engineering & Management, 3 131-140.
Gang, M. G., Kim, G. H., Shin, K. W., Jeong, A. M., Kim, H. Y., Kim, C. H., Lee, S. W., Kim, T. G., 2018, Mechanical Cutting Process Trends for Difficult-to-Cut Materials-A Review-, Journal of the Korean Society for Precision Engineering, 35:3 253-267. [https://doi.org/10.7736/KSPE.2018.35.3.253]
Ye, D. H., Koo, J. Y., Park, Y. K., Kim, J. S., 2015, Analysis on the Effects of Tool Rake Angle and Helix Angle of a Flat End-mill in the Milling of Ti-alloy, Journal of the Korean Society of Manufacturing Technology Engineers, 24:5 508-513. [https://doi.org/10.7735/ksmte.2015.24.5.508]
Thepsonthi, T., Özel, T., 2015, 3-D Finite Element Process Simulation of Micro-End Milling Ti-6Al-4V Titanium Alloy: Experimental Validations on Chip Flow and Tool Wear, Journal of Materials Processing Technology, 221 128-145. [https://doi.org/10.1016/j.jmatprotec.2015.02.019]
Kim, N. Y., Hong, W. P., Lee, D. J., 2001, A Study on the Cutting Characteristics and Analysis by a FEM in the Machining of Ti-6Al-4V alloy, Journal of the Korean Society for Precision Engineering, 10:6 29-35.
Kim, D. H., Park, K. B., Cho, Y. T., Jung, Y. G., 2017, A Study on Improved Drill Shape for Efficient Drilling of Inconel 718 Using the Design of Experiment, Journal of the Korean Society for Precision Engineering, 34:3 161-166. [https://doi.org/10.7736/KSPE.2017.34.3.161]
Cho, C. Y., Rye, S. H., 2014, Analysis of Cutting Edge Geometry Effect on Surface Roughness in Ball-end Milling Using the Taguchi Method, Journal of the Korean Society of Manufacturing Technology Engineers, 23:6 569-575. [https://doi.org/10.7735/ksmte.2014.23.6.569]
Kim, H. G., Kim, E. Y., Cho, M. H., 2013, Structural Optimization Based on Equivalent Static Load for Structure under Dynamic Load, Proc. of the Korean Society for Noise and Vibration Engineering Autumn Conf., 236-240.
Kim, E. Y., Baek, S. M., Cho, M. H., 2010, A Study of Equivalent Static Loads Combined With System Reduction Methods In Transient Dynamic Optimization Problems, Proc. of the Korean Soc. Mech. Eng. Autumn Conf., 732-737.

Do Hyeog Kim

Ph.D. candidate in the Department of Mechanical Engineering, Changwon National University.His research interests are Machine and Nano-Micro Technology.

E-mail: haho0109@naver.com

Yoon Gyo Jung

(Former) Professor in the Department of Mechanical Engineering, Changwon National University.His research interests are Machine and Grinding Technology.

Yong-Seon Mo

Director of Research in NDT　Engineering & Aerospace Co., ltdHis interests in research are in the field of mechanical devices including robots and the finite element analysis related to them.

E-mail: ysmo@ndteng.co.kr

Young Tae Cho

Professor in the Department of Mechanical Engineering, Changwon National University.His research interests are Machine, Nano-Micro Technology, and Precision Manufacturing System.

E-mail: ytcho@changwon.ac.kr