Abstract
This research article investigates the minimization of uncut fiber length (UFL) in bidirectional carbon fiber-reinforced polymer (CFRP) drilling through experiments executed using a computer numeric control drilling machine and a titanium nitride-coated drill bit. The cutting conditions, such as the feed rate, spindle speed, and were varied to determine their effects on UFL. Three drilling setups were compared: dry machining, drilling using liquified nitrogen layers, and drilling using ice layers. The results showed that the use of ice improved hole quality and increased drilling efficiency by providing bottom support for the CFRP sheet sandwich, reducing delamination and fiber pull-out. Additionally, the feed rate, cutting speed, and drill geometry significantly influenced hole quality and maximum UFL. Overall, the study sheds light on the usefulness of cooling agents and bottom support for the modification of cutting parameters in bidirectional CFRP drilling.
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Acknowledgments
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT of Korea (NRF-2022R1A2C3007963) and the Development of smart manufacturing multiverse platform based on multisensory fusion avatar and interactive AI funded by the Ministry of Trade, Industry, and Energy (20025702).
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Anand Prakash Jaiswal is presently a Ph.D. candidate specializing in Mechanical Engineering at the esteemed Ulsan National Institute of Science and Technology (UNIST) in South Korea. His current academic pursuit involves the attainment of a doctoral degree in the field of machining of Carbon Fiber Reinforced Polymer (CFRP) materials at UNIST. The focal point of his scholarly endeavors revolves around analytical modeling and the optimization of machining techniques applied to composite materials.
Hyung Wook Park is an esteemed Professor of Mechanical Engineering at Ulsan National Institute of Science and Technology (UNIST), South Korea. He holds a Ph.D. from Georgia Institute of Technology, USA, and received his B.S. and M.S. degrees from Seoul National University, Korea. Professor Park’s research interests encompass machine tools, metal cutting processes, non-traditional machining techniques, surface texturing using metal cutting, FEM modeling, and advancements in robot manufacturing. His contributions significantly enrich the academic and scientific community, enhancing knowledge and understanding in these critical areas of research.
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Jaiswal, A.P., Park, H.W. Experimental investigation of the minimization of uncut fiber length in bidirectional CFRP drilling. J Mech Sci Technol 37, 6173–6180 (2023). https://doi.org/10.1007/s12206-023-2410-5
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DOI: https://doi.org/10.1007/s12206-023-2410-5