镁合金手机外壳的热冲压模具设计论文[带图纸].doc

哈尔滨工业大学华德应用技术学院毕业设计（论文）-I-摘要冷冲模是广泛运用的模具之一，但在特殊条件下也可进行加热，即热冲压模具。冲压模具具有成本低，产品质量稳定，能加工多种性能，状态的零件的特点。但在应用时也受到模具寿命和生产安全等方面的制约。本文主要是根据零件的生产技术要求，设计了落料拉深的复合模具，同时设计了浮动式切边模具。在第一套模具的设计中，主要采用的是落料和反拉深的结合，此结构相对较为简单。由于镁合金的塑性成型需要在一定的温度条件下才能实现，所以温度的控制是一个关键点，在此采用了嵌入式电阻丝进行电加热，且辅以温控系统的控制，成型温度为100-350℃。第二套模具主要采用浮动式切边，在该设计中主要是对切边的行程进行控制。各个导板计算需精确。关键词冷冲压；落料；拉深；浮动式切边哈尔滨工业大学华德应用技术学院毕业设计（论文）-II-AbstractDiemoldiswidelyusedasone,butunderspecialconditionscanalsobeheated,orhot-stampingdies.Stampingdiewithalowcost,productqualityandstability,toprocessavarietyofperformancecharacteristicsofthestateoftheparts.Butinactualapplicationhasalsobeendielifeandproductionofsecurityconstraints.Thisarticleisbasedontheproductionofsparepartstechnicalrequirements,designdrawingofthecompoundblankingdie,whilethedesignofthefloatingtrimmingdie.Inthefirstsetofmolddesign,themainuseofthematerialandanti-pulloffacombinationofdeep,thisstructureisrelativelysimple.Theplasticmoldingofmagnesiumalloysduetotheneedatacertaintemperatureconditionscanbeachieved,sotemperaturecontrolisakeypoint,inthisuseoftheembeddedresistorwireforelectricheating,andsupplementedwiththecontroloftemperaturecontrolsystem,moldingtemperatureof100-350℃.Thesecondsetofmoldsusedmainlyfloatingtrimming,inwhichthedesignofthetripmainlyfortrimmingcontrol.Eachguideplatebeaccuratelycalculated.KeywordsWarmstamping；falltoexpect；pulldeeply；floatingbeadcut哈尔滨工业大学华德应用技术学院毕业设计（论文）-III-目录摘要.................................................................................................................IAbstract..........................................................................................................II第1章绪论...................................................................................................11.1模具行业发展的现状及未来发展趋势..............................................11.1.1模具行业发展现状及技术趋势现状...........................................11.1.2我国及国外模具行业的发展状况及发展趋势...........................31.1.3未来冲压模具制造技术发展趋势...............................................41.2课题研究的目的意义及主要内容......................................................61.2.1课题研究的目的及意义...............................................................61.2.2本课题的主要研究内容...............................................................6第2章零件的工艺性分析...........................................................................82.1零件的工艺性分析..............................................................................82.1.1冲裁件的精度与粗糙度...............................................................82.1.2冲裁件的材料...............................................................................82.2工艺方案的确定..................................................................................82.2.1工艺方案.......................................................................................82.2.2排样的确定...................................................................................92.2.3冲裁件的排样...............................................................................92.2.4搭边...............................................................................................92.2.5材料利用率.................................................................................102.2.6模具及板材的温度.....................................................................112.3本章小结............................................................................................11第3章冲压模具总体结构设计.................................................................123.1模具总体结构设计............................................................................123.1.1模具形式.....................................................................................123.1.2操作与定位方式.........................................................................123.1.3送料卸料方式.............................................................................123.1.4模架类型及精度.........................................................................133.2本章小结............................................................................................13第4章冲压模具工艺与设计计算.............................................................14哈尔滨工业大学华德应用技术学院毕业设计（论文）-IV-4.1计算冲压力、压力中心、初选压力机............................................144.1.1计算毛坯尺寸.............................................................................144.1.2计算落料冲裁力.........................................................................144.1.3计算拉深力.................................................................................144.1.4压力机选择.................................................................................154.1.5确定压力中心.............................................................................154.2凸模与凹模刃口尺寸的确定............................................................154.2.1落料凸、凹模刃口尺寸的计算.................................................154.2.2落料凹模.....................................................................................174.2.3拉深凸模.....................................................................................184.2.4落料拉深凸凹模.........................................................................194.2.5计算冲裁间隙.............................................................................204.3本章小结............................................................................................20第5章冲压模具的零件选用.....................................................................225.1模架的确定........................................................................................225.1.1上模座.........................................................................................235.1.2下模座.........................................................................................235.1.3导柱、导套.................................................................................245.2模具的闭合高度的计算....................................................................245.3模柄的确定........................................................................................255.4导料板、卸料板的确定....................................................................265.4.1导料板（JB/T7648.5-1994）.....................................................265.4.2卸料板.........................................................................................265.5挡料方式............................................................................................275.6推件装置............................................................................................275.7弹性元件............................................................................................275.8确定装配基准.....................................................................................275.9总装简图.............................................................................................285.10本章小结...........................................................................................29第6章切边模总体设计.............................................................................306.1切边模总体设计................................................................................306.1.1总体工艺方案的选择.................................................................306.1.2浮动式切边模的特点.................................................................30哈尔滨工业大学华德应用技术学院毕业设计（论文）-V-6.1.3切边过程中的运动分析.............................................................306.2冲模结构设计要点...........................................................................316.2.1凹模冲切的移动量.....................................................................316.2.2凹模运动斜度和尺寸设计.........................................................326.3本章小结...........................................................................................32第7章主要结构设计.................................................................................337.1工作移动量的确定............................................................................337.1.1凹模冲切移动量.........................................................................337.1.2凹模运动斜度和尺寸设计.........................................................347.2凸模设计...........................................................................................357.3定位芯的设计....................................................................................367.4导板的设计........................................................................................367.4.1左导板设计.................................................................................387.4.2右导板设计.................................................................................397.4.3前导板设计.................................................................................407.4.4后导板设计.................................................................................407.5压力机的选用....................................................................................417.5.1压力机行程选择.........................................................................417.5.2压力机压力选择.........................................................................417.6本章小结...........................................................................................43第8章切边模零件的确定.........................................................................448.1模架的选择........................................................................................448.1.1上模座.........................................................................................448.1.2下模座.........................................................................................458.1.3导柱、导套.................................................................................458.2模柄的确定.......................................................................................468.3确定装配基准与材料........................................................................468.4切边模总装简图................................................................................478.5本章小结............................................................................................48结论...............................................................................................................49致谢...............................................................................................................50参考文献........................................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