Development of a selective thickness-reduction technology by combining lateral oscillation with press forging

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04218
• 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: Fukuoka Institute of Technology
• Principal Investigator: Hirota Kenji 福岡工業大学, 工学部, 教授 (50273256)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 鍛造 / 荷重 / 揺動 / 振動

Outline of Final Research Achievements

A new forging method applying lateral oscillation during axial compression was proposed to reduce the forging load. The effects of the oscillation conditions and the geometry of workpiece on the load were studied through the experiment using pure aluminum and the corresponding numerical simulation. The load reducing effect was primarily affected by the relative oscillation speed to the compression speed. The load was maximumly reduced by 35% compared with that without oscillation for cylindrical workpieces, while the maximum load reduction ratio was 17% for disk workpieces. However, the load for disk workpieces was not reduced further, although the tool shape and workpiece dimension were modified.

Free Research Field

塑性加工

Academic Significance and Societal Importance of the Research Achievements

金属を高さ方向に圧縮する際に横方向の揺動動作によるせん断応力を加えると圧縮方向の圧縮応力が減少することが理論的に示されている。この考えを直動アクチュエータにより実現し、純アルミニウムの円柱および円盤材の圧縮加工に対してFEM解析と実験により圧縮荷重が低減できることを実証した。また、荷重低減に影響を与えるパラメータについて明らかにした。この成果は荷重の増加が問題となるような鍛造加工品において加圧限界の向上や、金型やプレス機械への負荷の低減に寄与する。