毕业设计定位套.docx

毕业设计定位套篇一:定位套毕业设计重庆机电职业技术学院毕业设计(论文) 课题名称定位套的机械加工工艺规程及数控加工编程学生姓名xxxxxxxx学号xxxxxxxxxxxxxx系别机械工程系专业班级机械设计与制造xxxx 指导教师xxxxxxxx技术职务xxxxxxxxx 重庆机电职业技术学院教务处制重庆机电职业技术学院毕业设计(论文)任务书指导教师:年月日零件图如上图重庆机电职业技术学院毕业设计(论文)开题报告篇二:密封圈定位套的设计目录零件图及其零件毛坯图·································2一零件分析··········································3 ································································································3二确定毛坯类型和毛坯尺寸····························3 ······························································3三工艺规程设计···································································································································、工序尺寸及公差的确定····································································13四工序40钻孔夹具的设计······························································································26五参考文献········································27六实训总结········································28 零件图零件毛坯图密封圈定位套的设计一零件分析 ,它的外圈有凹凸结构,内圈端面突出一部分保证轴向定位要求,两者都可以作为密封圈的辅助元件达到定位密封圈,保证密封工作稳定的要求。 ,、耐磨性、耐热性及减震性,适用于承受较大应力、要求耐磨的零件。该零件的主要加工面为内孔和外圆周面,同时与其他零件有配合要求。因此价格精度较高。直径为180mm的外圆面形状较复杂呈凹凸结构,与直径为160mm的结果类似,它们都有同轴度要求,。该处直接影响零件的密封性能。因此加工时,凹凸部分同时加工。直径为130mm和90mm的孔因为与其它零件也有配合要求,同时表面粗糙度要求也较高,因此需要精度较高的机床加工。其余表面加工精度要求均较低,不需要高精度的机床加工,通过车或铣削,钻床的粗加工就可以达到要求。 ,零件按大批量生产的情况设计工艺过程。二确定毛坯类型和毛坯尺寸 。毛坯的铸造方法选用砂型及其造型,又由于箱体零件的内孔需要铸出,故还应该安放型芯。此外根据需要材料不能有疏松、夹渣等缺陷。为了消除残余应力,铸造后应安排人工时效。 ,确定加工总余量(毛坯余量)的方法有两种。一种是根据表面各工序加工总余量确定;另一种是直接根据毛坯的类型和加工方法确定。这里用第二种方法。1)铸件尺寸公差等级: (GB/T6414-1999)查的铸件尺寸公差等级为CT7级,。 2)铸件机械加工余量: 加工余量由精到粗分为A、B、C、D、E、F、G、H、J和K共十级,。查资料各表面的总加工余量见下表1。三工艺规程设计 ,通常先确定精基准,然后在确定粗基准。1)精基准的选择: 密封圈定位套Φ130的轴线是凹凸部分的设计基准,左端面是