티타늄 합금(Ti-6A1-4V)의 밀링가공에서 L자형 얇은 벽 구조의 가공품질 향상

Abstract

Titanium alloy (Ti-alloy) is widely used as a material for core parts of aircraft structures and engines thatrequire both lightweight and heat-resistant properties owing to their high specific stiffness. Most parts used inaircraft have I-, L-, and H-shaped thin-walled structures for weight reduction. It is difficult to machinethin-walled structures owing to vibrations and deformations during machining. In particular, cutting tooldamage occurs in the corners of thin-walled structures owing to the rapid increase in cutting force andvibration, 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-walledstructure with Ti-alloy (Ti 6Al 4V). – – Three types of machining experiment were performed. The surfacequality, tool wear, cutting force, and vibration were analyzed comprehensively, and an effective machiningmethod in terms of tool life and machining quality was derived.