I托架钻孔夹具的设计完成日期：指导教师签字：评阅教师签字：答辩小组组长签字：答辩小组成员签字：摘要II本文主要介绍了机床夹具的发展背景和在机械加工中的作用，托架钻孔夹具的设计过程。夹具是在机械加工过程中，为了保证加工精度，固定工件，使之占有确定位置以接受加工或检测的工艺装备。工件在机床上加工时要确定两个安装要求，即定位和夹紧设计过程中主要包括定位方案的选取，导向方案中钻套参数的选取，夹紧机构的选择，采用分度方案的原因及夹具体的选择；斜孔钻模上工艺孔的设置和计算，夹具总图上尺寸、公差及技术要求的标注；工件的加工精度分析等。关键字：夹具；钻模；定位；夹紧IIIAbstractThispapermainlyintroducesthedevelopmentbackgroundofthemachinetoolfixtureandthefunctioninmachining,andthedesignprocessofbracketboringfixture..Thefixtureisintheprocessofmachining,inordertoguaranteethemachiningaccuracy,fixedtheworkpiece,sothatitoccupiesadeterminedpositiontoaccepttheprocessingortestingprocessequipment.Theworkpieceinthemachinetoolprocessingtodeterminethetwoinstallationrequirements,thatis,positioningandclamping.Thedesignprocessincludelocatingschemeselection,orientedprogramdrillsetsofparametersselection,choiceofclampingmechanismbyindexingschemeandselectionofthespecificfolder;settingandcalculationofinclinedholejigholeprocess,fixturegeneraldimensions,tolerancesandtechnicalrequirementsofthemark;workpiecemachiningaccuracyanalysis.Keywords:jig,jig,positioning,clamping;目录1、绪论............................................................11.1课题研究背景及夹具发展趋势....................................................................................11.2机床夹具.............................................................................................................................31.2.1夹具主要的作用.............................................31.2.2机床夹具的分类.............................................31.2.3钻模设计要点...............................................4IV1.3课题任务.............................................................................................................................42、托架斜孔分度钻模的设计.....................................................................................62.1定位方案......................................................62.2导向方案......................................................82.3夹紧方案......................................................92.4分度方案......................................................92.5夹具体的选用.................................................92.6斜孔钻模上工艺孔的设置与计算...............................102.7夹具总图上尺寸，公差及技术要求的标注.......................102.8工件加工精度分析............................................112.8.1定位误差..............................................112.8.2对刀误差..............................................122.8.3安装误差..............................................122.8.4夹具误差..............................................122.8.5加工方法误差..........................................13设计总结..................................................................................................................................15致谢..........................................................................................................................................16参考文献..................................................................................................
