HFW660排辊成型模型建立及带坯边部曲分析-材料科学与工程专业毕业论文.docx

AbstractIn Abstract In this thesis，the research on the process design of the cage roll—forming is conducted based the HFW 660 cage roll forming mill which has complex deformation， and setting up geometric model by CAD system．Then the forming process of X80 strip and springback are simulated by finite element analysis software ABAQUS and verified by field measurement．And to explore the influence of different thickness and type of steels on mechanical property． The researches show that it has little influence of strip edge’S longitudinal strain before the finishing forming period，but the maximum increase in the fmishing forming pedod；The greater the thickness，the greater the equivalent plastic strain(PEEQ)at the sanle place；By the increasing of the thickness，more materials plastic deformation occurred，and the springback will be reduced，which is advantageous to the tube forming at the next step．When the yield strength greater，the smaller the maximum of longitudinal strain in the finishing forming period；On the cross section，the PEEQ value of changed by the edge is greater than the center，which both have a decreasing trend．The increase of yield strength，the strip steel are less likely to be plastic deformation，which makes the springbaek greater that is advantageous to廿1e tube forming at t11e next step． Keywords：Cage roll forming；finite element simulation；longitudinal strain； equivalent plastic strain；springback II 万方数据 目录摘要 目录 摘要 ．．I Abstract ． ． ． ． ． ． ． ． ． ． II 第1章绪论 ．．1 1．1引言 1 1．2直缝焊管排辊成型技术的发展 2 1．3直缝焊管成型技术的研究现状 3 1．4回弹问题的有限元分析 6 1．5本文研究内容与方法 6 1．6本章小结 7 第2章HFW排辊成型基本理论 8 2．1排辊成型仿真理论简介 8 2．2材料的非线性分析 8 2．2．1材料的屈服准则 。8 2．2．2硬化准则 ．．10 2．2．3弹塑性本构关系 11 2．3显式法求解动力学方程 ．13 2．4接触问题 1 5 2．4．1接触面算法 15 2．4．2接触面的处理 15 2．5本章小结 ．16 第3章HFW660排辊成型几何模型的建立 17 3．1直缝焊管生产线模型建立系统概述 ．17 3．2 CAD／CAE系统 ．17 3．3 HFW焊管排辊机组几何模型 ．19 3．4本章小结 20 第4章HFW660焊管排辊成型仿真及验证 2 l 4．1 HFW660焊管排辊机组有限元模型 21 4．2排辊成型仿真结果及分析 ．24 4．3仿真验证 ．25 4．3．1线成型段 25 4．3．2精成型段 26 4．4回弹探究 ．27 TII 万方数据 4。5本章小结 4。5本章小结 ．30 第5