圧延圧接方式による熱間シートバー接合技術の検討
2003 年 89 巻 11 号 p. 1150-1157
詳細
2003 年 89 巻 11 号 p. 1150-1157
A roll-bonding technology of sheet bars aimed at fully continuous hot strip rolling was studied. Rolling of two piled up sheet bars at the entry of roll-bite was modeled and roll biting conditions were discussed in conjunction with friction coefficient between a work roll and a sheet bar as well as friction coefficient at the interface of two sheet bars. Pushing force by sheet bar's inertia was estimated by a spring-mass system model and the influence of the pushing force on roll biting conditions were examined. To examine the influence of the oxide layer at the interface of two sheet bars on biting and bonding phenomena, rolling experiments were performed by both laboratory rolling mill and production hot strip mill. If the thickness of oxide layer at the interface of sheet bars is thin enough, both biting and bonding can be achieved. It appeared that sheet bar's inertia force has great influence on roll-biting of two pile up sheet bars.
