锻压技术

管材斜连轧过程有限元模拟与实验研究

英文标题：Finite element simulation and experiment study on tandem skew rolling process of tube

单位：1.太原科技大学太原重型机械装备协同创新中心 2. 运城学院机电工程系 3.太原科技大学电子信息工程学院

分类号：TG335.71

出版年,卷(期):页码：2019,44(10):101-109

摘要：

管材斜连轧工艺是一种生产无缝管材的短流程新工艺，集成了传统的穿孔与轧管工序，属二步法工艺。采用有限元软件Deform-3D，建立了管材斜连轧过程有限元模型，并以45碳钢为管坯材料，模拟分析了斜连轧过程的管材的流动规律及应力场、应变场、速度场分布规律。在斜连轧实验机组上进行了实验研究，分析了轧后荒管质量及尺寸精度，以及轧制过程轧制的变化规律。模拟结果表明：管材斜连轧过程中，管材最大应力出现在穿孔段、轧管段内变形区，尤其接触变形区；管材应变呈现层状分布，沿着轴线出口方向逐渐变大；管材速度场呈现层状分布，沿径向由外而内逐渐变小。实验表明：斜连轧工艺可生产出合格无缝管材，尺寸精度中直径为（Φ38.18±0.4）mm，壁厚为（3.66±0.3）mm。

The tandem skew rolling (TSR) process of tube is developed as a new process with the short process for producing seamless tube, which combines the traditional piercing process with the tube rolling process as a two-step process. Taking 45 steel as the material of tube billet, the FE model of TSR process of tube was constructed by the finite element software Deform-3D, and the flow law and the distribution laws of stress field, strain field and velocity field for tube in TSR process were analyzed. The experiments were conducted in TSR experiment mill, the quality and dimensional precision of the rolled tube were analyzed, and the changing law of rolling force was obtained. The simulation results show that the maximum stress occurs in the deformation zones of the piercing and rolling sections respectively, especially in the contact deformation zones in TSR process of tube. The strain is distributed in layers with the increasing trend along the axial direction from entrance to exit. However, the velocity is distributed in layers with the decreasing trend along the radial direction from outside to inside. The experimental results show that the qualified seamless tubes are produced by TSR process, and the dimensional precision of diameter and wall thickness are (Φ38.18±0.4 mm) and (3.66±0.3)mm, respectively.

基金项目：

山西省留学基金项目(2017-084);山西省重点学科建设经费资助(20170386)

作者简介：陈建勋(1966-),男,学士,高级工程师 E-mail：84321197@qq.com

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