Deformation behaviour of chips with built-up edges in metal machining

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04208
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Hiroshima University
• Principal Investigator: Sekiya Katsuhiko 広島大学, 先進理工系科学研究科(工), 助教 (80226662)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 構成刃先 / 凝着 / 切りくず / 切削加工

Outline of Final Research Achievements

The aim of the project is to elucidate the phenomena that occur in cutting in order to promote development of cutting technology. In this project, a new experimental method was developed to freeze the cutting phenomena, focusing on chips produced in cutting. By observing the cross-sectional microstructure of the chips obtained, it was suggested that the built-up edge, in which the material immediately after chip formation adheres to the tool surface, plays an important role in chip formation, and that the edge does not disappear even when cutting at high speeds and that chips flow on the edge. Although it is conventionally believed that the built-up edges disappear under high speeds, the results of this study show that the built-up edges do not disappear under normal cutting conditions, although they become thinner.

Free Research Field

加工学

Academic Significance and Societal Importance of the Research Achievements

切削加工において，切りくず生成には構成刃先が大きな影響を及ぼしていることが新たに判明した．このことから，切削時に必要な力の大きさや，工具の寿命に大きな影響を及ぼす切削熱のより正確な予測，生成した切りくずの排出性の向上のためには，構成刃先の存在を考慮した切削モデルの構築が必要となることが判った．
また，生成された構成刃先をうまく利用すれば，希少元素が含まれている切削工具の寿命が延長され省資源化に貢献できる可能性が示唆された．