Metallurgical Abstracts on Light Metals and Alloys vol.57

Kinematical Study on Bonding Criterion in Cold Roll Bonding

Hiroshi Utsunomiya*, Takashi Jinnouchi*,Takao Kitagawa** and Ryo Matsumoto*
* Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
** Engineering and Development Department, Proterial Metals Limited, Suita 564-0043, Japan

[Published in CIRP Annals, Vol. 73 (2024)]

https://doi.org/10.1016/j.cirp.2024.04.016
E-mail: uts[at]mat.eng.osaka-u.ac.jp
Key Words: Bonding, Rolling, Surface modification, Composite

Though roll bonding is used to manufacture clad sheets in industries, the bonding criterion of layers has not been fully understood. This paper proposes that same speeds and accelerations are necessary conditions for bonding. Al/Cu/Al stacked sheets were cold rolled and changes in layer speeds and bonding status were investigated. Cu layer entered the roll bite at higher speed than Al layers. In cases without bonding, Cu layer always moved at higher speed than Al layers. In cases bonding was attained, Al layers accelerated and caught up with the Cu layer, then the three layers moved at same speed for a certain distance, then they were bonded together.

Change of layer speeds in the roll bite (with wire brushing, D=70mm).