摘要
介绍了金属带材弹塑性变形弯曲基本理论和概念,建立了过拉伸因子OS(Overstrech fac-tor)与塑区比P(rate of plastification)之间的对应关系,指出金属带材在反复弯曲过程中,变形程度最大处OS取值为7比较合理,此时金属带材变形塑区比为85%。对强化金属材料强化系数对矫直机辊缝设定的影响进行了模拟计算和分析,结果表明:要想达到相同的塑区比,强化系数越大,所需的压下量就越大;但当强化系数小于0.01时,与理想金属材料相比,增大的压下量微乎其微,可按理想金属材料近似处理,根据某精整分厂现有产品大纲,带钢的强化系数一般不超过0.01,因此在辊缝预设定模型中,为了简化计算,均按理想金属材料处理,对带钢矫直效果无明显影响。
The paper introduced the basic theory and concept of elastic - plastic deformation of metal material; established the corresponding relation between the overstretch factor and the plastic -area ratio; pointed out that it was reasonable that the maximum value of OS was 7, which means that the plastic - area ratio of mental material is 85% ; simulated and analyzed the effect on roller gap preset with strengthen factor. The result showed that the larger the strengthening factor is, the larger the quantity will push down. But when the strengthening factor is smaller than 0. 01, the quantity added will be infinitesimal if compared to the ideal mental. So it could have a proximate treatment as the ideal mental material. According to the current product outline of some mills, the strengthening factor of mental material is normally not beyond 0. 01. So in order to simplify the calculation, strengthening factor can be omitted as it takes very small effect on the leveling effect of strip.
出处
《重型机械》
2008年第1期26-29,共4页
Heavy Machinery
关键词
矫直机模型
辊缝预设定
残余应力
强化系数
弯曲曲率
过拉伸因子
leveler model
roller gap preset
residual stress
strengthen factor
bending curvature
over- stretch factor
