对称式三辊矫圆工艺研究

doi:10.3901/JME.2017.14.136

机械工程学报 ›› 2017, Vol. 53 ›› Issue (14): 136-143.doi: 10.3901/JME.2017.14.136

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对称式三辊矫圆工艺研究

于高潮¹, 赵军¹, 邢娇娇^1,2, 赵非平³, 李森林³

1. 先进锻压成形技术与科学教育部重点实验室(燕山大学) 秦皇岛 066004;
2. 河北工业大学廊坊分校基础课部廊坊 065000;
3. 南通超力卷板机制造有限公司南通 226631

收稿日期:2016-08-12 修回日期:2016-11-28 出版日期:2017-07-20 发布日期:2017-07-20
通讯作者: 赵军(通信作者),男,1957年出生,博士,教授,博士研究生导师。主要研究方向为板材成形及其智能化控制技术和精密塑性成形技术。E-mail:zhaojun@ysu.edu.cn
作者简介:于高潮,男,1988年出生,博士研究生。主要研究方向为板材和管材成形理论和成形工艺。E-mail:gch_yu@ysu.edu.cn
基金资助:
国家自然科学基金（51575473，51175452）和河北省钢铁联合研究基金（E2016203209）资助项目。

Research on the Symmetrical Three-roller Setting Round Process

YU Gaochao¹, ZHAO Jun¹, XING Jiaojiao^1,2, ZHAO Feiping³, LI Senlin³

1. Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University), Ministry of Education of China, Qinhuangdao 066004;
2. Basic Course Department, Hebei University of Technology Langfang Branch, Langfang 065000;
3. Nantong Chao Li Rolling Machine Producing Co., Ltd., Nantong 226631

Received:2016-08-12 Revised:2016-11-28 Online:2017-07-20 Published:2017-07-20

摘要/Abstract

摘要： 为揭示对称式三辊矫圆原理，优化矫圆策略，对三辊矫圆工艺进行理论解析和试验研究。基于平面曲梁纯弯曲弹复方程，采用双线性简单随动强化模型，通过数学归纳法建立往复弯曲弹复曲率方程和弹复曲率统一方程。理论解析结果表明：管坯周向不同初始曲率的管壁微段在矫圆加载过程中经历多次往复弯曲湮灭了初始曲率的差异，最终使各管壁微段弹复后曲率统一。通过几何关系，建立上辊压下量、弯曲曲率半径和弹区比的定量关系，进而可实现上辊压下量的预测。三辊矫圆试验验证了对称式三辊矫圆原理。试验结果表明：随着弹区比减小，残余椭圆度逐渐减小，当弹区比接近40%时，残余椭圆度接近0.3%，远小于美国石油管道协会API 5L的规定。同时验证了在小变形范围内，残余椭圆度与初始椭圆度关系不大。

关键词: 薄壁管, 弹复, 工艺原理, 三辊矫圆, 数学归纳法, 往复弯曲

Abstract: In order to reveal the mechanism of the symmetrical three-roller setting round process and optimize the setting round strategy, the theoretical analysis and experimental research of the three-roller setting round process are carried out. The springback equation of small curvature plane pure bending about curve beam is a base, the bilinear simple kinematic hardening model is used, and the springback curvature equation and the unified springback curvature equation of reciprocating bending are established by the mathematical induction method. Theoretical analysis results show that the difference of initial curvature can be eliminated and the curvature values are unified through every micro-pipe-wall of the pipe with different initial curvature experiences multiple times of reciprocating bending. The quantitative relationship between the upper roller reduction, bending radius and elastic area ratio is established by the geometric relation, nominal curvature, wall thickness, and mechanical properties. The mechanism of the symmetrical three-roller setting round process is verified by three-roller setting round experiments. The experiment results show that with the decrease of the elastic area ratio the residual ovality decreases gradually. When the elastic area ratio is close to 40%, the residual ovality can be close to 0.3%, which is far less than the requirement of API 5L. It is verified that there is little relationship between residual ovality and initial ovality in the small deformation range.

Key words: mathematical induction method, process mechanism, reciprocating bending, springback, thin-walled pipe, three-roller setting round

中图分类号:

TG306

于高潮, 赵军, 邢娇娇, 赵非平, 李森林. 对称式三辊矫圆工艺研究[J]. 机械工程学报, 2017, 53(14): 136-143.

YU Gaochao, ZHAO Jun, XING Jiaojiao, ZHAO Feiping, LI Senlin. Research on the Symmetrical Three-roller Setting Round Process[J]. Journal of Mechanical Engineering, 2017, 53(14): 136-143.

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对称式三辊矫圆工艺研究

Research on the Symmetrical Three-roller Setting Round Process

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