超高压应力增塑镦粗变形坯料外形轮廓理论模型预测  

Theoretical model prediction of billet profile for ultra-high pressure stress in plasticizing upsetting deformation

作　　者：刘艳雄[1,2] 张涵 苏文卿[3] 周旺标 龚宇澄 LIU Yan-xiong;ZHANG Han;SU Wen-qing;ZHOU Wang-biao;GONG Yu-cheng(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China;Shandong Longertek Technology Co.,Ltd.,Jinan 250022,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]汽车零部件技术湖北省协同创新中心,湖北武汉430070 [3]山东朗进科技股份有限公司,山东济南250022

出　　处：《塑性工程学报》2024年第10期1-9,共9页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52275371)。

摘　　要：对超高压应力增塑镦粗成形工艺下坯料的成形过程展开研究,从理论角度构建了坯料在超高压应力下的外形轮廓模型,可实现超高压应力下坯料的外形轮廓预测。利用ABAQUS软件建立了超高压应力增塑镦粗有限元模型,分析了摩擦力和超高压应力对理论模型预测精度的影响。通过实验得到的坯料外形轮廓对仿真模型进行了验证,进一步探讨了超高压应力对坯料变形均匀性的影响机理。研究结果表明,理论模型能够较好地预测不同摩擦力和超高压应力下坯料的外形轮廓变化,仿真和实验得到的外形轮廓吻合较好。与传统镦粗相比,在超高压应力作用下坯料的塑性和变形均匀性均得到显著提高。The forming process of the billet in plasticizing upsetting deformation under ultra-high pressure stress was investigated.The profile model of the billet under ultra-high pressure stress was constructed from the theoretical perspective,and the prediction of the billet profile under ultra-high pressure stress can be realized.The finite element model of ultra-high pressure stress in plasticizing upsetting deformation was established by ABAQUS to analyze the influence of friction force and ultra-high pressure stress on the prediction accuracy of the theoretical model.The simulation model was verified by the billet profile obtained by the experiment.Furthermore,the influence mechanism of ultra-high pressure stress on the deformation uniformity of the billet was explored.The research results show that the theoretical model can robustly predict the billet profile variations under different friction forces and ultra-high pressure stresses.The simulated and experimental profiles are in good agreement.Compared with the conventional upsetting,the plasticity and deformation uniformity of the billet under ultra-high pressure stress are significantly improved.

关 键 词：高强度低塑性材料 应力增塑 摩擦因数 

分 类 号：TB31[一般工业技术—材料科学与工程]