摘要蛇形轧制作为一种新兴的轧制方法，使轧板能更容易的咬入轧机，但由于蛇形轧制的轧制工艺参数设置使得轧板在加工过程中容易产品翘曲。本文以AA7050铝板作为研究对象，用Marc有限元分析软件为载体建立了实验模型，针对蛇形轧制中的翘曲问题，分别从压下率，辊速比，轧辊间水平距离和摩擦对其进行了研究和分析。本文得到的主要研究结论如下：（1）在不同的压下率影响下，压下率越大，曲率越大，轧制过程中产生的翘曲也就越大，对实际生产产生不利的影响；（2）辊速比对于轧辊的翘曲的影响最大，随着辊速比的增大，曲率逐渐增大，甚至在同等情况下随着辊速比的变化，翘曲方向也会发生变化。（3）摩擦对于翘曲的影响较为复杂，但在一定范围内还是有律可寻的，在本实验范围内，随着摩擦的增大，翘曲逐渐减小。（4）轧辊水平偏移距离的增大也会导致曲率的增大，轧制后的弯曲量也会增大。71007

毕业论文关键词： 蛇形轧制；有限元模拟；翘曲

Abstract Snake rolling as a new rolling method, so that the rolling plate can more easily bite into the mill, but because of the serpentine rolling rolling process parameters set so that the rolling plate in the process of easy product warpage. In this paper, AA7050 aluminum plate was used as the object of study, and the experimental model was established with Marc finite element analysis software. The warpage problem in the serpentine rolling was studied from the reduction ratio, the roll speed ratio, the horizontal distance between the rolls and the friction Conducted a study and analysis. The main conclusions of this paper are as follows: (1) Under the influence of different reduction rate, the greater the reduction rate, the greater the curvature, the greater the warpage in the rolling process, and adversely affect the actual production (2) the ratio of the roll ratio to the warpage of the roll is greatest, and as the roll ratio increases, the curvature increases gradually, and even in the same case, the warping direction changes with the roll ratio The (3) the effect of friction on the warping is more complex, but still within a certain range of law can be found in the scope of this experiment, with the increase in friction, warping gradually reduced. (4) The increase in the horizontal distance between the rolls also leads to an increase in the curvature, and the amount of bending after rolling increases.

KeyWords： Snake rolling; Finite element simulation; Warping

目  录

1 绪论 1

1.1 引言 1

1.2 蛇形轧制简介 1

1.2.1 蛇形轧制原理 1

1.2.2 蛇形轧制优点 2

1.2.3 蛇形轧制研究进展 2

1.3 板带轧制中的翘曲行为 2

1.3.1 板带翘曲的原因 3

1.3.2 板带翘曲的研究进展 3

1.4 有限元方法及Marc简介 4

1.4.1 有限元在轧制研究中的应用 4

1.4.2 有限元软件的选择 4

1.5 课题研究意义和内容 5

1.5.1 课题研究意义 5

1.5.2 课题研究内容 5

2 蛇形轧制有限元模型的建立 5

2.1 引言 6

2.2 几何模型 6