[B-1-14] Improvement of Finished Surface Roughness Based on Knowledge from Visualization of Built-up Edge Behavior 〇Yusaku Ando1,2, Yuki Sumiya2, Tomonori Ishihara2, Yasuhiro Oba2, Fumihiro Itoigawa1 (1.Nagoya Institute of Technology, 2.DENSO CORPORATION) Keywords:Machining、Built-up edge、Finished surface roughness、Visualization system、High-speed camera