锻压技术

精冲带钢冷轧温度传递与成形变形计算方法

英文标题：Calculation method of heat transfer and deformation in cold rolling for fine stamping strip steel

作者：郑九华常欣侯加林马正伦范殿明

关键词：冷轧轧辊带钢热变形有限元法

分类号：TG335

出版年,卷(期):页码：2018,43(4):163-168

摘要：

针对精冲带钢冷轧工艺变形会受到轧辊与带钢发热影响的问题，分析了精冲带钢冷轧工艺研究的特点，采用前人实测的辊面温度分布数据，建立轧辊与带钢的网格模型，提出一种结构热量传递、弹性段热膨胀和冷轧过程弹塑性动力学变形的集成计算方法，得到了轧辊与带钢在自身发热温度下的结构应力和变形分布。硬化状态下的304不锈钢带钢的单道次冷轧实例研究表明：结构应力较大的区域与温度变化梯度较大的区域是一致的；带钢横截面中部存在较大的凸起变形，而横截面两端会出现毛刺。研究结果验证了该集成计算方法的可行性，为实际冷轧工艺的数字化设计提供了方法基础。

For the effects of roller and strip heating on the deformation in the cold rolling of fine stamping strip steel, the cold rolling process characteristics of fine stamping strip steel were analyzed, and the grid model of roller and strip steel was built based on the preceding tested data of temperature distribution on the roller surface. Then, an integrated calculation method including structural heat transfer, thermal expansion of elastic segment and elastic-plastic dynamic deformation in the cold rolling process was proposed, and the structural stress and deformation distributions at self-heating temperature of roller and strip steel were obtained. The single-pass cold rolling example of 304 stainless steel strip in the harden state shows that the areas with larger structural stress coincide with the areas with greater temperature gratitude, and the central area at the cross section of strip steel has a large convex deformation and its two ends have burrs. From the above results, it validates the feasibility of the integrated calculation method, which provides a methodological basis for the digital design of actual cold rolling process.

基金项目：

国家国际科技合作专项资助（2015DFR70090）

郑九华（1972-），男，博士，副教授；E-mail：zjh1882@163.com

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