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*****本科毕业设计（论文）内燃机缸体零件加工工艺规程及孔的工装夹具的设计学生姓名：学生学号：院（系）：机械工程学院年级专业：2009级机械设计制造及其自动化指导教师：助理指导教师：二〇一三年六月*****本科毕业设计（论文）摘要I摘要毕业设计是每个大学生毕业前夕的前奏，是对所学知识的考核。通过整个大学对机械制图、机械设计、机械制造、工艺学等课程的学习，我们能够独自进行专业方向的设计。综合运用所学专业，把整个大学所学的知识融合贯通起来。既检验了自己所学的知识，又查漏补缺了自己所欠缺的方面。我这次设计的题目是内燃机缸体零件加工工艺规程及孔的工装夹具的设计。有夹具零件图、夹具体图各两张，机械加工工艺过程卡片一张。首先我们要熟悉内燃机缸体零件，根据零件的的性质和零件图上各端面的粗糙度确定毛坯的尺寸和机械加工余量。然后我们再根据定位基准先确定精基准，后确定粗基准，最后拟定内燃机缸体的工艺路线图，制定该工件的夹紧方案，画出夹具装配图。关键词内燃机缸体，夹具的设计，夹紧和定位攀枝花学院本科毕业设计（论文）ABSTRACTⅡABSTRACTGraduationdesignisapreludetoeachstudentsbeforegraduation,istheknowledge.Throughtheentireuniversitytothemechanicaldrawing,mechanicaldesign,machinerymanufacturing,technologyandothercoursesofstudy,wecanindependentlydesignprofessionaldirection.Comprehensiveuseofthespecialty,tolearnthewholeuniversityknowledgefusionthrough.Cantesttheirknowledge,andtheleakfilledhisaspects.Thisdesignisthesubjectofdesignofinternalcombustionenginecylinderpartsprocessingproceduresandholefixture.Afixtureparts,fixturedrawingofthetwo,machiningprocesscard.Firstwemustbefamiliarwiththeinternalcombustionenginecylinderparts,accordingtothenatureoftheendpartsandcomponentsmaptodeterminetheroughnessofthesizeandmechanicaljiagongyuliang.Accordingtoanotherlocationandthenwesetthebenchmarkfinefirstbase,establishedafterthebenchmarkcrude,finalizingtheinternalcombustionenginecylinderblockoftheroadmap,theenactmentoftheworkpiececlampingprogramme,todrawfixtureassembly.KeywordsInternalcombustionenginecylinderblock,Thejigdesign,Clampingandpositioning攀枝花学院本科毕业设计（论文）目录1目录摘要..................................................................................................................................................IABSTRACT.........................................................................................................................................II1绪论................................................................................................................................................12缸体的工艺分析及工艺的计算.....................................................................................................22.1零件的结构特点.....................................................................................................................22.2工艺规程设计........................................................................................................................22.2.1确定零件生产类型......................................................................................................22.2.2确定零件毛坯的种类和制造方法..............................................................................22.2.3工艺方案的制定原则分析..........................................................................................22.2.4组合机床工艺过程确定的原则..................................................................................32.2.5定位基准的选择..........................................................................................................42.2.6工艺路线的分析..........................................................................................................52.2.7机械加工余量、工序尺寸及毛坯尺寸的确定..........................................................62.2.8切削用量和时间定额的确定......................................................................................73铣左右侧面夹具设计...................................................................................................................363.1设计任务分析.......................................................................................................................363.2定位基准的选择...................................................................................................................363.3夹紧元件的设计...................................................................................................................373.3.1夹紧装置的组成和基本要求....................................................................................373.4.2铣削力计算................................................................................................................383.4.3夹紧力计算.............................................................................................................383.5定向键与对刀装置设计......................................................................................................393.6夹具操作的简要说明...........................................................................................................413.7夹具的公差..........................................................................................................................413.7.1制订夹具公差的基本原则和方法............................................................................413.7.2与加工要求没有直接关系的加具尺寸公差的制订................................................414镗床夹具设计..............................................................................................................................424.1结构分析..............................................................................................................................424.2夹具的结构类型..................................................................................................................424.3夹紧力大小的确定原则....................