Abstract—A comprehensive study is conducted to determine the causes of defects and geometric-parameter deviations in the near-edge zone of flat rolled products during the production of large-diameter pipes in the TESA 1420 line. The methodology and results of measuring the geometric parameters and the mechanical properties at the edge crimping area are presented. The contact and noncontact sections of a pipe billet in contact with a deforming tool are determined during crimping the edges, and a calculation scheme for determining the geometric parameters in the deformation zone is developed. Mathematical modeling of the edge crimping process using the Deform software package has been carried out with allowance for the deviation of the geometric and mechanical parameters of the initial billet from these parameters of a theoretical circle. According to the modeling results, zones with the maximum residual stresses are determined. The results obtained are used to propose a method for step-by-step crimping of the edges of flat rolled products and a device for its implementation.

摘要——对TESA 1420生产线大口径管材生产过程中扁材近边区缺陷和几何参数偏差的原因进行了综合研究。介绍了在边缘卷曲区域测量几何参数和机械性能的方法和结果。在压边过程中确定了管坯与变形工具接触的接触截面和非接触截面，并制定了确定变形区几何参数的计算方案。使用 Deform 软件包对边缘卷曲过程进行数学建模，考虑到初始坯料的几何和机械参数与理论圆的这些参数存在偏差。根据建模结果，确定具有最大残余应力的区域。所得结果用于提出一种逐步压接扁平轧材边缘的方法及其实施装置。