基于有限元法的PQF连轧过程宽展规律的仿真  

Spread Rule During PQF Seamless Tube Rolling Process Based on FEM

作　　者：汪飞雪[1] 杜凤山[1] 于辉[1] 孙静娜[1] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《钢铁》2013年第3期51-55,共5页Iron and Steel

基　　金：国家自然科学基金资助项目(51275445);秦皇岛市科学技术研究与发展计划资助项目(2012021A084)

摘　　要：根据PQF连轧孔型及工艺特点,分析了连轧管宽展规律对产品尺寸精度和钢管横截面积的影响,并建立PQF连轧过程三维非线性有限元模型,预报了荒管的尺寸形状,对比某厂现场数据,两者吻合良好。通过对不同孔型、不同规格产品的系列仿真,研究宽展规律的影响因素,分析了延伸系数和空隙率对周长系数的影响,延伸系数和减径率对壁厚系数的影响;并利用多元线性回归分析法得到PQF连轧宽展模型,为PQF连轧孔型设计及产品尺寸精度控制提供了理论指导。According to the geometric pass and technological characteristics in the three-roll continuous mandrel rolling process, the effects of spread rule on the tube dimension accuracy and cross sectional area of tube was also inves- tigated. A 3-D nonlinear finite element model of this process was established to predict the size of elongated shell. The simulation solutions show good agreement with the experiment results. By a series of simulations on different pass and different specifications, the influence factors of spread rule were studied including the effect of the lengthening coefficient and the clearance rate on the circumference coefficient and the effect of the lengthening coefficient and the reducing rate on the thickness coefficient. The spread model was also obtained by multiple linear regression analysis method which provides a theoretical basis for the pass design and the tube dimension precision of the three- roll continuous mandrel rolling process.

关 键 词：PQF 三辊连轧管 宽展模型 有限元 回归分析 

分 类 号：TG335[金属学及工艺—金属压力加工]