Elucidation of joining mechanism of ultrasonic welding using planar vibration

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K14863
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Nihon University
• Principal Investigator: ASAMI Takuya 日本大学, 理工学部, 助教 (60706571)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 超音波接合 / 異種金属 / 縦振動 / ねじり振動 / 複合振動 / 振動軌跡 / 面状軌跡

Outline of Final Research Achievements

The purpose of this study is to develop a vibration source that generates planar vibration, and to investigate the joining characteristics of aluminum and copper plates in order to elucidate the joining mechanism. First, the development of a vibration source that generates planar vibration to facilitate the observation of the joining process was achieved by using a step horn with a hollow part and a one-sided support structure. Next, the joining characteristics by the planar vibration were evaluated by the methods of tensile shear test and cross tensile test. I found that the welded strength with the planar vibration exceeded the linear vibration in both test methods. In addition, I also clarified that high strength can be obtained regardless of the surface roughness in the welded strength by the planar vibration.

Free Research Field

音響・超音波工学

Academic Significance and Societal Importance of the Research Achievements

本研究は，異種金属の接合方法として用いられる超音波接合法の改良について行った。具体的には用いる振動を複雑な軌跡を描くようにした。その結果，複雑な軌跡を用いた超音波接合法は，従来の超音波接合法よりも高い接合強度を得られることを明らかにした。本研究の成果は，論文，および学会発表を通して広く周知を行った。そのため，複雑な軌跡を用いた超音波接合法の先導的な役目を全うし，また同時に知的財産の共有を行えたと考える。