发动机汽缸盖三维实体造型及自动编程

发动机汽缸盖三维实体造型及自动编程摘要本文所设计的是发动机汽缸盖三维实体造型及自动编程，发动机汽缸盖是典型的复制箱体类零件。首先对复制箱体类零件国内外研究现状进行分析和数控机床的发展分析：其次发动机汽缸盖零件的分析，汽缸盖的作用、工艺性分析和生产纲领的确定：接着对发动机汽缸盖工艺规程设计，包括确定毛坯、定位基准的选择、轴承的选择及校核和确定切削用量及选择刀具；接着进行发动机汽缸盖建模及编程：最后进行铣用夹具的设计。关键词：发动机汽缸盖：建模；编程；铣用夹具Engine cylinder head 3 D solid shape and automaticprogrammingAbstract:The design of this paper is the engine cylinder cover three-dimensionalsolid modeling and automatic programming,engine cylinder cover is a typical copy ofthe box parts.Firstly,the research status of duplicate box parts at home and abroad isanalyzed and the development of CNC machine tools is analyzed.Secondly,theengine cylinder cover parts analysis,cylinder cover function,technology analysis andproduction program determination;Then the engine cylinder cover process design,including the determination of blank,positioning datum selection,bearing selectionand check and determine cutting parameters and tool selection;Then the enginecylinder cover modeling and programming;Finally,the design of milling fixture.Key words:Engine cylinder head;Modeling;Programming;Milling fixture目录摘要…关键词…一、绪论…1.研究背景及意义..12.国内外研究现状.·1)国外研究现状2)国内研究现状23.数控机床发展二、发动机汽缸盖零件的分析31.零件的作用..32.零件的工艺分析3.生产纲要的明确..…41发动机汽缸盖工艺规程设计51.确定毛坯..….52.定位标准的挑选3.工艺路线的拟定51)工序顺序的安排...52)工艺路线64.切削用量明确和刀具选择...61)选择切削用量........62)计算切削力、切削扭矩及切削功率83)刀具耐用度的计算94)选择刀具结构..10三、发动机汽缸盖建模及编程.101.软件介绍102.发动机汽缸盖建模103.发动机汽缸盖数控加工141)加工燃烧室面..152)加工中38和中44孔183)加工侧面长孔204)加工G3/4孔底孔.215)加工2-M12底孔236)加工2-M10底孔..25四、发动机汽缸盖夹具设计.281.定位方案的确定282.误差分析........281)定位误差28c.计算气缸体右端面加工尺寸的定位误差.·292)对刀误差△r…303)加工方法误差△c304)夹紧方法误差△0303.夹紧方案的确定...311)夹紧方案..312)夹紧力的预算...314.钻模套型式的选择和设计325.夹具体的确定.....33结论……34参考文献….35