冷弯方矩形管工艺参数的优化研究

发布时间：2018-07-05 01:55

本文选题：方矩形管 + 有限元法　；参考：《武汉科技大学》2015年硕士论文

【摘要】：随着我国国民经济的快速发展，大型方矩形管在建筑、土木、集装箱等行业有着广阔的市场前景。在采用直接成方工艺连续冷弯成型生产方矩形管时，先将板带通过冷弯成型机组成型，再进行对缝挤压焊接和整形，得到最终的方矩形管。为了能使板带边部的焊接过程完全和稳定的进行，必须在冷弯机组成型过程中防止边部产生边浪、纵向弯曲等缺陷的产生。本文基于田口方法对冷弯成型的机架间距、摩擦系数和成型速度等工艺参数的不同水平值正交试验设计，利用ABAQUS有限元仿真软件，对正交试验方矩形管生产过程的冷弯成型的十个道次进行显式非线性动态分析，分别得到每个道次上边部应变峰值最小时各个工艺参数的取值，通过对成型机组的优化配置，减少了边部的纵向伸长和剪切变形，，同时，优化后有效改善了成型过程中第四到第十道次边部变形的均匀性，防止边部边浪、纵向弯曲等缺陷的产生。
[Abstract]:With the rapid development of China's national economy, large square rectangular tubes have a broad market prospect in construction, civil engineering, container and other industries. When the square rectangular tube is produced by continuous cold forming with direct square forming process, the plate and strip are formed through the cold forming machine, then the seam extrusion welding and shaping are carried out, and the final square rectangular tube is obtained. In order to make the welding process of strip edge complete and stable, it is necessary to prevent edge wave and longitudinal bending in the forming process of cold bending machine. In this paper, based on the orthogonal design of different horizontal values of stand spacing, friction coefficient and molding speed, the Abaqus finite element simulation software is used. In this paper, the explicit nonlinear dynamic analysis of 10 passes in the cold forming process of orthogonal square rectangular tube is carried out, and the values of each process parameter are obtained when the peak strain of the upper side of each pass is minimum, and the optimum configuration of the forming unit is obtained. The longitudinal elongation and shear deformation of the edge are reduced, at the same time, the uniformity of the deformation of the fourth to the tenth pass in the molding process is effectively improved after optimization, and the defects such as the edge wave and the longitudinal bending are prevented.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG306

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