Empirical research on innovative processing methods to achieve lighter weight and higher strength

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05172
• 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: Komatsu University
• Principal Investigator: Tomizawa Atsushi 公立小松大学, 生産システム科学部, 特任教授 (10744980)
• Co-Investigator(Kenkyū-buntansha): 末吉 敏恭 琉球大学, 工学部, 准教授 (10264475) ; 政木 清孝 埼玉工業大学, 工学部, 教授 (30323885)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 熱間曲げ / 焼入れ / 3次元曲げ / せん断曲げ

Outline of Final Research Achievements

Three-dimensional hot bending and quenching (3DQ) technology, which enables the manufacture of automotive parts with a pressure of 1470 MPa or higher, has been developed to improve fuel economy and crash safety of automobile.
In this study, empirical research work on new "shear bending 3DQ" method is carried out to solve the problems of "wrinkles" and "thickness " in conventional 3DQ.A new high-rigidity testing machine was designed and introduced for experimental research of a new "shear bending 3DQ" in which the deformation mode of processing is the shear mode. The special induction heating coil and the compact cooling nozzle also are designed. Through experiments using the testing machine and the heating/cooling equipment, it is confirmed that this new shear bending 3DQ method is effective.

Free Research Field

塑性加工学

Academic Significance and Societal Importance of the Research Achievements

近年，環境問題を解決するため，バッテリーを搭載したハイブリッド車や電気自動車の改良が続けられている．これらの車両ではバッテリーが高重量となるため，高強度化による部品の軽量化や電池を保護するための堅牢な保護構造が必要となる．これらに対応するために，今回の研究成果は上記の要求や必要性にぴったり合致し，しかも安価でリサイクル性に優れた鋼の持つ性能を究極まで引き出すものであり，また日本の独自技術であることから，その実施意義は極めて高い．