拉弯矫直工艺模型与带钢矫后力学性能研究

发布时间：2018-01-19 23:39

本文关键词： 拉弯矫直带钢工艺模型速度模型显微组织力学性能　出处：《太原科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：拉弯矫直是带钢生产线上矫正板型、破鳞、提高质量的经典金属成型技术,其工作原理是将带张力的板带材同时进行弯曲而产生塑性延伸,消除板带材的形状缺陷、应力缺陷以及质量缺陷,获得各项性能优异的产品,因此拉弯矫直机在带钢生产线上得到了广泛的应用。随着制造业的迅速发展,国内本身起步较晚的拉矫技术研究与国际领先技术有了较大的差距,粗放的技术偏多,精尖技术偏少;舶来技术偏多,自主技术偏少,所以在拉弯矫直领域的研究中尚需严谨系统的理论模型以及更多的实验研究,以便提出更深层次的改善要求,使得这个优秀的技术能够获得更加高水平的应用。本文以太原科技大学450mm拉弯矫直试验台为基础,在深入探讨拉伸弯曲矫直原理的基础上,结合控制系统工艺模型,建立了完善的拉弯矫直工艺模型,设计了不同的拉矫工艺路线,进行了带钢的拉弯矫直实验,研究了不同拉弯矫直工艺对矫后带钢性能的影响规律。本文的主要内容和研究成果如下:1.精确确定了中性层偏移量、张力、压弯量和延伸率的计算方法,明确了工艺参数之间的相关关系,建立了完善可靠的拉弯矫直工艺模型,为工艺参数的设定与控制提供了基本的支持。2.建立了带钢拉弯矫直速度控制模型,完善了拉弯矫直模型,对拉弯矫直机组设备控制系统进行了调试,确保了机组的稳定运转和拉矫延伸率的准确控制,完善了机组控制系统。3.进行了拉弯矫直材料性能实验研究,研究了不同拉矫工艺参数对带钢组织和性能的影响,得到了带钢性能随工艺参数变化的规律,确定了最优参数的范围,为改善材料性能的拉矫工艺设置提供了参考。由上可知,本论文的研究结果对丰富拉伸弯曲矫直理论、促进拉伸弯曲矫直技术改善带钢组织性能等方面起到了积极有益的作用,也表明拉伸弯曲矫直理论尚有很多亟待完善的地方,有必要继续探讨。
[Abstract]:Tensile bending and straightening is a classical metal forming technology for correcting plate shape, scale breaking and improving quality in strip production line. Its working principle is to bend the strip with tension at the same time and produce plastic extension. Eliminating the shape defect, stress defect and quality defect of the strip, and obtaining the products with excellent properties, the tension straightener has been widely used in the strip production line. With the rapid development of the manufacturing industry. There is a big gap between the domestic and the international leading technology, the extensive technology is more, the fine point technology is less; More imported technology and less independent technology, so in the field of tension and bending straightening research, there is still a need for rigorous and systematic theoretical model and more experimental research, in order to put forward a deeper level of improvement requirements. So that this excellent technology can be applied to a higher level. This paper is based on the 450 mm tensile straightening test bench of Taiyuan University of Science and Technology, on the basis of deeply discussing the principle of tensile bending straightening. Combined with the process model of the control system, a perfect drawing and bending straightening process model was established, different drawing and straightening process routes were designed, and the straining and straightening experiments of strip steel were carried out. The effects of different tension and straightening processes on the properties of post-straightening strip are studied. The main contents and results of this paper are as follows: 1. The calculation methods of neutral layer offset, tension, bending and elongation are determined accurately. The correlation between process parameters is clarified, and a perfect and reliable straightening process model is established, which provides the basic support for the setting and control of process parameters. 2. The speed control model of strip bending straightening is established. The model of tension and bending straightening is improved and the control system of tension and bending straightener is debugged to ensure the stable operation of the unit and the accurate control of the elongation of tension and straightening. The experimental study of tensile and bending straightening material properties was carried out, and the influence of different drawing and straightening process parameters on the structure and properties of strip steel was studied, and the variation of strip steel properties with process parameters was obtained. The range of the optimal parameters is determined, which provides a reference for improving the setting of tensile straightening technology. From the above, we can know that the research results of this paper are rich in the theory of tensile bending straightening. It has played a positive and beneficial role in improving the microstructure and properties of strip steel by means of tensile bending straightening technology. It also shows that the theory of tensile bending straightening is still in need of improvement, and it is necessary to continue to study it.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG335.5

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