귀중품 포장 블록용 폴리우레탄 소재의 NC 가공조건 결정에 관한 연구
Abstract
Polyurethane is used for packaging valuables. However, it is challenging to cut polyurethane while maintaining the exact form of the workpiece because of its high elasticity. Therefore, it is essential to precisely determine the machining parameters for maintaining the form accuracy rather than the processing speed. In this study, the machining conditions that could maintain the contact surface accuracy were determined so that the packaging block could stably support the contents. Based on the characteristics of the Taguchi technique and experimentally applied initial machining conditions, the optimum machining conditions such as the spindle speed, feed rate, step over, and tool path pattern, considering the machining stability and machined surface integrity, were determined.
Keywords:
Packaging valuables, Polyurethane foam, Form accuracy, Taguchi technique, Machining conditions, Optimum conditionsAcknowledgments
이 연구는 서울과학기술대학교 교내 일반과제 연구비 지원으로 수행되었습니다.
References
- Kim, N. H., 2012, Selection of the Optimal Machining Condition for a High-hardness Resin using the 5-axis Machine, Journal of the Korean Society of Manufacturing Process Engineers, 11:5 29-34.
- Min, S. H., 2000, A Study of an Effect of Tool Offset on Cutting Precision Considering Cutting Force in Polyurethane Foam Cutting, The Korean Society of Mechanical Engineers, 24:12 3018-3025.
-
Zhang, Y., Wu, Z., 1997, Offset Face Gear Drives: Tooth Geometry and Contact Analysis, Journal of Mechanical Design, 119 114-119.
[https://doi.org/10.1115/1.2828772]
-
Shim, V. P. W., 2000, Two-dimensional Response of Crushable Polyurethane Foam to Low Velocity Impact, International Journal of Impact Engineering, 24 703-731.
[https://doi.org/10.1016/S0734-743X(99)00149-9]
-
Kim, H. S., Lee, B. Y., Lee. S. H., 2018, Drop Impact Analysis of Outside Cooling Unit Package of System Air-Conditioner and Experimental Verification, Journal of the Korea Academia-industrial Cooperation Society, 19:4 111-116.
[https://doi.org/10.5762/KAIS.2018.19.4.111]
-
Kwon, T. H., Suh, C. H., Lee, R. G., Oh, S. G., Jung, Y. C., Lim, H. B., 2013, Optimization of Design Parameters for Lock-Claws of Pneumatic Fitting Using Taguchi Method, Transactions of the Korean Society of Mechanical Engineers-A, 37:12 1541-1546.
[https://doi.org/10.3795/KSME-A.2013.37.12.1541]
-
Liu, J. W., Jin, J., Ko, T. J., Baek, D. K., 2013, Study of Optimal Machining Conditions of Ultrasonic Machining By Taguchi’s Method, Transactions of the Korean Society of Mechanical Engineers-A, 37:2 213-218.
[https://doi.org/10.3795/KSME-A.2013.37.2.213]
- T-Scan Manual, 2016, TaeSan Solution Ltd., 1-75.
- Maeng, H., Lee, M., Kim, N., et al., 2014, Development of Automation Devices for the 3D Digital Measuring and Preservation of Archival Artifacts, Research Report, National Archives, 1-286.
- Eun, S., 2019, A Study on the Machining Condition of 3D Shape Polyurethane Packaging Support, Master’s thesis, Seoul National Univ. of Science & Technology, Korea.
Graduate student in the Department of Mechanical System Design Engineering, Seoul National University of Science and Technology.His research interest is machine. design and precision machining.
E-mail: eunsuin@gmail.com
Graduate student in the Department of Mechanical System Design Engineering, Seoul National University of Science and Technology.His research interest is mechanical design and vibration analysis/test.
E-mail: lch2058@naver.com
Professor in the Department of Mechanical System Design Engineering, Seoul National University of Science and Technology.His research interest is precision machining and machine tool design technology.
E-mail: maeng@seoultech.ac.kr