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大型直缝焊管三辊连续矫圆工艺

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针对大型直缝焊管成形后存在的椭圆度过大和截面畸变等问题,提出一种新的三辊连续矫圆工艺.该工艺可分为三个阶段:加载阶段、辊弯矫圆阶段和卸载阶段.基于离散化的思想,建立大型直缝焊管辊弯矫圆阶段的一次静不定问题的力学模型,得到矫圆过程中管材的变形响应.模拟和理论计算结果表明,管材截面沿周向存在三个正向弯曲区域和三个反向弯曲区域;各辊载荷随时间呈现增长、稳定、下降趋势;理论拟合曲线与模拟数据点之间的误差很小,仿真结果验证了理论计算的可靠性.实验结果表明,管材的残余椭圆度随压下量的增加而减小,并且转折点处的压下量是管材的最佳压下量;此外,管材的残余椭圆度小于0.7％,且无截面畸变,验证了大型直缝焊管三辊连续矫圆工艺的可行性.
Three-roller continuous setting round process for longitudinally submerged arc welding pipes
In order to solve the problems of excess ovality and cross-section distortion of longitudinally submerged arc welding pipes after forming, a new three-roller continuous setting round process was proposed. This process can be divided into three stages: loading stage, roll bending stage and unloading stage. Based on the discretization idea, the mechanical model of the primary statically indeterminate problem of the longitudinally submerged arc welding pipes at the roll bending stage was established, and the deformation response was obtained. The simulation and theoretical results show that there are three positive bending regions and three reverse bending regions along the circumference of the pipe. The loading force of each roller shows growth, stability and downward trend with time. The error between the theoretical fitting curve and the simulated data point is very small, and the simulation results verify the reliability of the theoretical calculation. The experimental results show that the residual ovality decreases with the increase of the reduction, and the reduction of the turning point is the optimum reduction. In addition, the residual ovality of the pipe is less than 0.7％without cross-section distortion, which verifies the feasibility of this process.

longitudinally submerged arc welding pipesthree-roller continuous setting roundstatically indeterminate problemmechanical modelovalityoptimum reduction

黄学颖、赵军、于高潮、孟庆党、穆振凯、翟瑞雪

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燕山大学 先进锻压成形技术与科学教育部重点实验室,秦皇岛 066004

燕山大学 机械工程学院,秦皇岛 066004

大型直缝焊管 三辊连续矫圆 静不定问题 力学模型 椭圆度 最优压下量

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hebei Province of ChinaNational Major Science and Technology Projects of China

520054315170544951975509E20202030862018-ZX04007002

2021

10.1016/S1003-6326(21)65586-3

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(5)
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