米诺六辊UC轧机轧制黄铜板材板形问题分析

Flatness analysis of brass plate cast by Minoxidil six UC mill

针对中色奥博特铜铝业有限公司意大利米诺六辊UC轧机轧制黄铜板带出现的严重板形问题,探讨了造成宽度为650 mm的C2680黄铜板形差、弯辊力大、加工硬化严重等问题的原因.结果表明,通过控制辊系精度、中间辊抽动位置及轧制工艺调整可以显著改善宽幅黄铜轧制的板形,控制辊系精度保证偏心率不超过0.01 mm,中间辊的位置约为带卷加工率的2倍,保证来料的软硬性能(硬度低于70 HV),即可降低合金的变形抗力,提高合金的板形质量,并彻底消除加工硬化印.

In order to solve the serious shape problem of brass plate by Mino six roll UC mill. The factors for poor shape, high roll bending force and high work hardening of C2680 sheet with width of 650 mm are analyzed. The results show that the shape of wide brass sheet can be dramatically improved by controlling rollers precision, in-termediate rolls position and rolling process. Controlling the rollers precision is applied to guarantee the eccen-tricity ratio to be lower than 0.01 mm. The value of intermediate rolls position is about two times as processing rate, which ensure the hardness of raw materials to be lower than 70 HV. The deformation resistance can be de-creased by improving the quality of shape of brass sheet and eliminating work hardening imprints.