On the machine estimation of Cutting fluid and prediction of surface roughness by micro feed milling

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04149
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Hiroshima University
• Principal Investigator: TANAKA Ryutaro 広島大学, 先進理工系科学研究科(工), 准教授 (60361979)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 切削加工 / 切削油剤 / 仕上げ面粗さ / 工具摩耗

Outline of Final Research Achievements

Cutting force just after start of one cut in up-cut was used to estimate the friction characteristic of cutting fluid at contact between tool and work material. When the depth of cut was around edge roundness, the cutting fluid of lower coefficient of friction easily occurred stick-slip, and the higher transfer error occurred at the cutting conditions where the relatively clear feed mark formed. The lower coefficient of friction cutting flued caused larger tool wear at the surface formation area. The depth of deformed work material when cutting fluid used was smaller than that in dry cutting. Therefore, it was thought as a one of reason of increase of tool wear that the higher hardness work material rubbed the took surface.

Free Research Field

機械加工学

Academic Significance and Societal Importance of the Research Achievements

ユーザーが入手可能な切削油剤の特性値は常温におけるデータであることがほとんどであるため，切削条件による油剤の効果が変化する理由を説明できない場合が少なくないが，提案した手法は工具動力計さえあれば切削油剤にユーザーが切削状態に近い状態で特性を評価できる．得られた成果は，工具寿命の判断に用いられる横逃げ面摩耗の抑制効果が高い油剤が，刃先形状の転写精度の低下や仕上げ面生成領域の工具摩耗を促進させる可能性も示しており，最適な油剤の特性を見極める際に，提案した手法の活用が期待できる．