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http://dx.doi.org/10.14775/ksmpe.2021.20.11.052

Improving Machining Quality of L-Shaped Thin-Walled Structure in Milling Process of Ti-Alloy (Ti-6Al-4V)  

Kim, Jong-Min (Graduate School, Gyeongsang National Univ., and KJF)
Koo, Joon-Young (Bethel Machine Tool)
Jun, Cha-Soo (Department of Industrial and Systems Engineering & Engineering Research Institute, Gyeongsang National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.11, 2021 , pp. 52-59 More about this Journal
Abstract
Titanium alloy (Ti-alloy) is widely used as a material for core parts of aircraft structures and engines that require both lightweight and heat-resistant properties owing to their high specific stiffness. Most parts used in aircraft have I-, L-, and H-shaped thin-walled structures for weight reduction. It is difficult to machine thin-walled structures owing to vibrations and deformations during machining. In particular, cutting tool damage occurs in the corners of thin-walled structures owing to the rapid increase in cutting force and vibration, and machining quality deteriorates because of deep tool marks on machined surfaces. In this study, milling experiments were performed to derive an effective method for machining a L-shaped thin-walled structure with Ti-alloy (Ti-6Al-4V). Three types of machining experiment were performed. The surface quality, tool wear, cutting force, and vibration were analyzed comprehensively, and an effective machining method in terms of tool life and machining quality was derived.
Keywords
Ti-alloy; Milling Process; Thin-walled Structure; Cutting Signal; Machined Surface; Tool Wear;
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