汽车转向节十字轴的预锻成形及模具改进说明书.doc

本科毕业论文题目：汽车转向节十字轴的预锻成形及模具改进院（部）：材料科学与工程学院专业：材料成型及控制工程班级：姓名：学号：指导教师：完成日期：山东建筑大学毕业论文I目录摘要··································································ABSTRACT····························································1前言·································································11.1课题背景及选题意义····················································11.2国内外发展及研究现状··················································21.3课题的认识及研究方法··················································31.3.1课题的研究对象·····················································31.3.2课题的研究方法·····················································42课题实验的方案·······················································52.1热模锻成形工艺························································52.1.1模锻的特点·························································52.1.2模锻的分类·························································52.1.3开式模锻工艺·······················································52.1.4影响开式热模锻金属成形的因素·······································62.1.5模具对金属变形的影响···············································72.1.6本课题的十字轴成形工艺·············································82.2UG简介·······························································92.2.1UG产品概述·························································92.2.2UG主要技术特点····················································102.2.3本课题有关UG的运用···············································112.3DEFORM-3D简介······················································112.3.1DEFORM的发展····················································112.3.2DEFORM的特点····················································122.3.3有限元模拟理论基础················································122.3.4DEFORM模型的建立················································13山东建筑大学毕业论文II3课题方案的实施······················································153.1模具的三维造型·······················································153.1.1十字轴几何特征及尺寸分析··········································153.1.2创建十字轴三维实体模型············································153.1.3创建模锻十字轴的模具模型··········································183.2十字轴成形过程模拟···················································193.2.1十字轴预锻过程模拟················································193.2.2十字轴终锻过程模拟················································244模拟结果及分析······················································264.1十字轴的传统模锻成形模拟结果及分析···································264.1.1等效应力分析······················································264.1.2等效应变分析······················································274.1.3速率分析··························································284.1.4载荷分析··························································294.2预锻模具的改进·······················································294.3十字轴的改进模锻成形模拟结果及改进··································314.3.1改进后等效应力分析················································324.3.2改进后等效应变分析················································324.3.3改进后速率分析····················································334.3.4改进后载荷分析····················································345结论及展望··························································355.1课题结论·····························································355.1.1分析了十字轴预锻成形工艺··········································355.1.2改进了十字轴预锻成形工艺··········································355.1.3积累了丰富的使用三维造型和加工模拟软件的经验······················355.2课题展望·····························································35谢辞··································································37参考文献·······························································38山东建筑大学毕业论文III摘要近几年，随着经济和汽车行业的快速发展，十字轴作为传动系统的重要组成部分，应用越来越广泛，地位也越来越重要。本文主要以十字轴为研究对象，以目前国内普遍应用的热锻工艺为研究前提，运用UG、DEFORM-3D软件系统的研究十字轴的成形过程和模具设计。利用DEFORM-3D有限元模拟软件对十字轴的成形过程进行模拟。分析应力状态和载荷-行程曲线。基于模拟结果，分析十字轴预锻成形过程中所出现的问题，提出模具设计的改进建议。关键词：十字轴；数值模拟；预锻变形；有限元；成形工艺