Structural dynamics of WC-Co tool surface in Ti cutting process

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K20419
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
• Research Institution: Toba National College of Maritime Technology
• Principal Investigator: Kodama Kenji 鳥羽商船高等専門学校, その他部局等, 准教授 (60508208)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: 切削加工 / 放射光 / 摩耗

Outline of Final Research Achievements

The following three experiments were performed to clarify the real-time wearing of the WC-Co carbide tip surface in milliseconds during milling of titanium alloys. 1. The side cutting experiment of titanium block was carried out using WC-Co carbide tips. Microscopic observation of chip surface deterioration after cutting was performed to evaluate the wear status. 2. We have developed a milling cutting system that is used to measure cutting dynamics. A reflector attached to the tip of a rotating cutter was irradiated with laser light, and the reflected light detection for each rotation of cutting was confirmed from the oscilloscope waveform. 3. At Synchrotron Radiation Facility, we investigated the beamline and devised an experimental layout.

Free Research Field

機械加工

Academic Significance and Societal Importance of the Research Achievements

本研究にて開発した、フライス切削中におけるチップすくい面のリアルタイム劣化をミリ秒単位で明らかにする評価システムは、乾式切削中のマクロな摩耗や割れの発生起源、進展メカニズムを解明することができる。これまでにない切削局所の劣化計測手法によって、高性能チップ開発に新たな知見を与える。本研究ではチタン合金をワークに、WC-Coをツールとして実験を実施した。これらは航空宇宙、医療、化学プラント等において幅広く利用されているチタン合金の超高速切削の実現に展開され、ひいては日本のものづくりの競争力を高めることにつながっていく。