大学毕业论文-—摩托车单向器飞轮冷挤压成形工艺及模具设计.doc

毕业设计论文第页共NUMPAGES45页摩托车单向器飞轮冷挤压成形工艺及模具设计（xxxxxxxxx，机械工程学院05级模具班）摘要：本文综述了国内外冷挤压技术的历史及发展状况，并对飞轮的冷挤压成形国内外现状进行了分析。论文还提出了飞轮冷挤压成形的难点及解决思路，对工艺方案进行了必要的理论分析和研究。本文将重点放在模具设计方面，意图是让飞轮成形得以实现。在模具的设计和安装上，作者应该了多种新颖的结构，例如凹模采用预应力组合凹模，可以提高凹模强度，延长模具寿命，节省贵金属材料。从经济和适用的角度，模具安装上采用国产SY4-100千牛液压机。从现实意义上说，能够利用国产的锻压设备生产进口产品，并且提高了生产效率，这将给我国的这个摩托车生产大国带来丰厚的效益。关键词：飞轮冷挤压液压机Isolatorsmotorcycleflywheelcoldextrusionprocessanddiedesign(ChongqingTechnologyandBusinessUniversity,InstituteofMechanicalEngineeringMold05classes)Abstract:Thispaperreviewsthecoldextrusiontechnologyathomeandabroadthehistoryanddevelopmentoftheflywheelandthecoldextrusionofthestatusquoathomeandabroadareanalyzed.Paperalsoproposedaflywheelcoldextrusionandresolvethedifficultideasandprogramstoprocessthenecessarytheoreticalanalysisandresearch.Thisarticlewillfocusonthemolddesign,formingtheintentistoallowtheflywheelcanbeachieved.Inthemolddesignandinstallationofon,thewritershouldbeavarietyofnovelstructures,suchastheuseofprestresseddiedie,dietoincreasestrength,toextenddielifeandsavepreciousmetals.Fromaneconomicpointofviewandapplication,installedontheuseofmoldsmadeSY4-100kNhydraulicpress.Fromapracticalsense,totakeadvantageofdomesticproductionofforgingequipmentimports,andincreasedproductionefficiency,thiswillChina'slargestproducerofthemotorcyclebroughthugebenefits.Keywords:Coldextrusion.Hydraulic.Flywheel目录1、前言…………………………………………………………………………52、冷挤压简介…………………………………………………………………82.1冷锻技术的概述…………………………………………………………82.2正挤压……………………………………………………………………82.3反挤压……………………………………………………………………82.4复合挤压…………………………………………………………………92.5径向挤压…………………………………………………………………92.6冷挤压变形程度的表示方法……………………………………………102.7反挤压变形程度表示方法………………………………………………102.8正挤压实心件变形程度表示方法………………………………………112.9正挤压空心件变形程度表示方法………………………………………113、冷挤压毛坯的制备…………………………………………………………123.1坯料形状和尺寸…………………………………………………………123.2冷挤压件图的制定………………………………………………………123.3毛坯尺寸的计算…………………………………………………………133.4工件冷挤压流程简介……………………………………………………144、坯料的软化处理.表面处理和润滑处……………………………………154.1毛坯的软化处理…………………………………………………………154.2毛坯的表面处理………………………………………