皮尔格轧机冷轧不锈钢管回弹预测模型的建立与验证  被引量:11

Establishment and Verification of Pilger Mill Cold Rolled Stainless Steel Tube Springback Prediction Model

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作  者:楚志兵[1] 吕阳阳[1] 黄庆学[1] 马立峰[1] 李玉贵[1] 杨彦龙[1] 

机构地区:[1]太原科技大学重型机械教育部工程研究中心,山西太原030024

出  处:《四川大学学报(工程科学版)》2015年第2期165-171,共7页Journal of Sichuan University (Engineering Science Edition)

基  金:国家自然科学基金资助项目(51105264);太原科技大学博士基金资助项目(201117);山西省青年基金资助项目(2012021019-5)

摘  要:以皮尔格LG60轧机轧制304不锈钢管为例,研究皮尔格轧机冷轧不锈钢管回弹预测模型。首先通过单向拉伸试验及数据处理的方法得到材料的分段非线性本构方程;其次根据钢管轧制的塑性变形规律结合增量理论,得到变形过程中各应变分量的计算方法,并把钢管变形过程中的受力状态由三向应力状态转化为单向应力状态,利用材料的卸载定律建立冷轧钢管的回弹预测模型;最后通过大型有限元模拟软件DEFORM-3D进行完整轧制过程的3维有限元模拟仿真,并利用皮尔格轧机进行实际轧制试验验证来检验回弹预测模型的可靠性与正确性。结果表明,本模型精度较高,对皮尔格轧机孔型设计及实际生产中成品管尺寸精度控制有重要指导意义。Rolling 304 stainless steel tube by Pilger pipe mill-LG60 was taken as example to establish and verify cold rolled stainless steel tube spring back prediction model. Firstly,on the basis of uniaxial tensile test,the piecewise nonlinear constitutive equation was gained by dealing the data. Secondly,according to the plastic deformation law of the steel tube rolling and incremental theory,the numerical method of every strain component during the deformation was gained and the stress state was changed from triaxial stress state to uniaxial stress state. Besides,the springback prediction model was established according to the law of material's unloading. Finally,by using the finite element software of DEFORM-3D,the complete simulation of rolling process was conducted,and the reliability and correctness of the springback prediction model were verified through the actual rolling test by Pilger pipe mill. The results showed higher accuracy of the model.

关 键 词:分段非线性本构方程 增量理论 非线性拟合 卸载定律 

分 类 号:TG335.7[金属学及工艺—金属压力加工]

 

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