工程科学学报，第40卷，第12期：1549-1556,2018年12月 Chinese Journal of Engineering,Vol.40,No.12:1549-1556,December 2018 DOI:10.13374/j.issn2095-9389.2018.12.014;http://journals.ustb.edu.cn 棒材二辊矫直过程曲率的全流程定量解析 马立东12)，陈硕)，黄庆学12)四，麻浩曦 1)太原科技大学太原重型机械装备协同创新中心，太原0300242)太原科技大学山西省冶金设备设计理论与技术重点实验室，太原030024 ☒通信作者，E-mail:hqx@yust.cdu.cn 摘要为了摸清棒材斜辊矫直过程中各曲率的变化规律，应用小曲率平面弯曲弹复理论以及棒材弯曲弹复的曲率方程式， 实现棒材一次反弯弹复的计算模型，基于棒材每旋转半周反弯一次的规律以及上一次弹复后的残余曲率认为是下一次弯曲 的原始曲率，建立棒材全流程二辊矫直过程弯曲弹复模型，获得整个矫直过程中原始曲率、弯曲曲率、弹复曲率以及残余曲率 的演变过程，得到棒材最终的残余曲率.应用该理论模型对现场生产过程进行了计算，与现场结果一致，验证了理论模型的正 确性.应用所建立的理论模型对不同直径、不同材料屈服强度、不同原始挠度的棒材矫直过程分别进行分析，获得了不同来料 参数情况下矫直过程的变形规律.该模型可以为二辊矫直机辊型优化设计与工艺参数计算提供理论依据. 关键词棒材：矫直；二辊；全流程；弹复 分类号TG355.21 Quantitative analysis of the whole curvature process for two-roll bar straightening MA Li-dong,CHEN Shuo,HUANG Qing-xue,MA Hao-xi) 1)Coordinative Innovation Center of Taiyuan Heavy Machinery Equipment,Taiyuan University of Science and Technology,Taiyuan 030024,China 2)Key Laboratory of Metallurgical Equipment Design Theory and Technology of Shanxi Province,Taiyuan University of Science and Technology,Taiyuan 030024,China Corresponding author,E-mail;hqx@tyust.edu.cn ABSTRACT The need for straighter bar products continues to increase with the development of production automation technologies and increasing user requirements,and bar manufacturers have set higher requirements for the bar finishing process.The two-roll straightening machine has become the key equipment of the bar finishing line,and its process directly relates to the quality of the final product.The traditional bar straightening technology is based on the theory of primary bending of bars,and by controlling the degree of plastic deformation,the straightening process of bars can be roughly established,but this is not suitable for high-precision straighte- ning.In this study,to obtain the variation law of each curvature in the cross-roll straightening process of bars,a one-time bending- spring calculation model of the bar was realized by applying the spring back theory of small curvature plane bending and the bending- spring back curvature equation.Based on the principle of bending once per half rotation and by considering the residual curvature of the last bending as the original curvature of the next bending,the bending-spring model of the whole two-bar straightening process was es- tablished.The evolution of the original curvature,bending curvature,spring curvature,and residual curvature of the whole straighte- ning process were obtained,and then the final residual curvature of the bar was obtained.The theoretical model was used to calculate the production process,and the results are consistent with the field results,which verifies the correctness of the theoretical model. Based on the established theoretical model,the straightening process was analyzed under different diameters,different material yield strengths,and different original deflections,and the deformation law of straightening process under different incoming parameters was obtained.The model can provide a theoretical basis for the optimization design and process parameter calculation of the two-roll straightening machine. KEY WORDS bar;straightening;two-roll;whole process;spring 收稿日期：2017-11-03工程科学学报,第 40 卷,第 12 期:1549鄄鄄1556,2018 年 12 月 Chinese Journal of Engineering, Vol. 40, No. 12: 1549鄄鄄1556, December 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 12. 014; http: / / journals. ustb. edu. cn 棒材二辊矫直过程曲率的全流程定量解析 马立东1,2) , 陈 硕1) , 黄庆学1,2) 苣 , 麻浩曦1) 1)太原科技大学太原重型机械装备协同创新中心, 太原 030024 2) 太原科技大学山西省冶金设备设计理论与技术重点实验室, 太原 030024 苣通信作者, E鄄mail:hqx@ tyust. edu. cn 摘 要 为了摸清棒材斜辊矫直过程中各曲率的变化规律,应用小曲率平面弯曲弹复理论以及棒材弯曲弹复的曲率方程式, 实现棒材一次反弯弹复的计算模型,基于棒材每旋转半周反弯一次的规律以及上一次弹复后的残余曲率认为是下一次弯曲 的原始曲率,建立棒材全流程二辊矫直过程弯曲弹复模型,获得整个矫直过程中原始曲率、弯曲曲率、弹复曲率以及残余曲率 的演变过程,得到棒材最终的残余曲率. 应用该理论模型对现场生产过程进行了计算,与现场结果一致,验证了理论模型的正 确性. 应用所建立的理论模型对不同直径、不同材料屈服强度、不同原始挠度的棒材矫直过程分别进行分析,获得了不同来料 参数情况下矫直过程的变形规律. 该模型可以为二辊矫直机辊型优化设计与工艺参数计算提供理论依据. 关键词 棒材; 矫直; 二辊; 全流程; 弹复 分类号 TG355郾 21 收稿日期: 2017鄄鄄11鄄鄄03 Quantitative analysis of the whole curvature process for two鄄roll bar straightening MA Li鄄dong 1,2) , CHEN Shuo 1) , HUANG Qing鄄xue 1,2) 苣 , MA Hao鄄xi 1) 1) Coordinative Innovation Center of Taiyuan Heavy Machinery Equipment, Taiyuan University of Science and Technology, Taiyuan 030024, China 2) Key Laboratory of Metallurgical Equipment Design Theory and Technology of Shanxi Province, Taiyuan University of Science and Technology, Taiyuan 030024, China 苣Corresponding author, E鄄mail:hqx@ tyust. edu. cn ABSTRACT The need for straighter bar products continues to increase with the development of production automation technologies and increasing user requirements, and bar manufacturers have set higher requirements for the bar finishing process. The two鄄roll straightening machine has become the key equipment of the bar finishing line, and its process directly relates to the quality of the final product. The traditional bar straightening technology is based on the theory of primary bending of bars, and by controlling the degree of plastic deformation, the straightening process of bars can be roughly established, but this is not suitable for high鄄precision straighte鄄 ning. In this study, to obtain the variation law of each curvature in the cross鄄roll straightening process of bars, a one鄄time bending鄄 spring calculation model of the bar was realized by applying the spring back theory of small curvature plane bending and the bending鄄 spring back curvature equation. Based on the principle of bending once per half rotation and by considering the residual curvature of the last bending as the original curvature of the next bending, the bending鄄spring model of the whole two鄄bar straightening process was es鄄 tablished. The evolution of the original curvature, bending curvature, spring curvature, and residual curvature of the whole straighte鄄 ning process were obtained, and then the final residual curvature of the bar was obtained. The theoretical model was used to calculate the production process, and the results are consistent with the field results, which verifies the correctness of the theoretical model. Based on the established theoretical model, the straightening process was analyzed under different diameters, different material yield strengths, and different original deflections, and the deformation law of straightening process under different incoming parameters was obtained. The model can provide a theoretical basis for the optimization design and process parameter calculation of the two鄄roll straightening machine. KEY WORDS bar; straightening; two鄄roll; whole process; spring