Lubrication mechanism of stamping oil containing fine ceramic particles

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K05095
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: Toyohashi University of Technology
• Principal Investigator: Abe Yohei 豊橋技術科学大学, 工学(系)研究科(研究院), 准教授 (60402658)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: しごき加工 / 微粒子添加油 / 焼付き / 直接観察 / セラミック微粒子 / カーボン微粒子 / ガラスダイ

Outline of Final Research Achievements

There is a need for the mass production of battery containers for electric and hybrid vehicles by stamping. The surface expansion ratio of the product and the die surface pressure are high in the stamping process, and the problem is that the stamped product is subjected to an ironing process that tends to cause seizure. Chlorinated additive oil is effective in preventing seizure, but its high environmental impact requires an alternative. In this study, we investigated the lubrication mechanism and the effective conditions for lubrication with an additive oil.

Free Research Field

塑性加工学

Academic Significance and Societal Importance of the Research Achievements

微粒子添加油を用いたしごき加工においてガラスダイを用いた焼付き抑制の観察，アルミニウム合金およびステンレス鋼の焼付き限界を調査した．観察より10ミクロンの粒径では平板とガラスの間で粒子が拘束，加工により平板に埋設されて直接接触を妨げているようであり，より小さな粒径では凝集したものの分裂分散も観察された．また，加工条件の調査結果から1ミクロンのSiO2粒子を1vol%添加した油によりA3003では12.8%から17.4%，SUS430では3.7%から9.4%に，炭素粒子では3.7%から6%ほどに向上できた．