空气压缩机曲轴零件的机械加工工艺及夹具设计毕业论文.doc
毕业设计3L-10/8空气压缩机曲轴零件的机械加工工艺及夹具设计学生姓名:学生学号:院院系):机电工程学院年级专业:机械制造及自动化1班指导教师:二七年六月攀枝花学院本科毕业设计目录目录摘要····································································································IABSTRACT······························································································I1绪论·································································································12零件分析·····························································································22.1零件的作用······················································································22.2零件的工艺分析·················································································22.3零件加工的主要问题和工艺过程设计分析··················································23工艺规程设计·······················································································53.1确定毛坯的制造形式···········································································53.2基面的选择······················································································53.2.1粗基准选择·············································································53.2.2精基准的选择···········································································53.3制定工艺路线····················································································53.4机械加工余量、工序尺寸及毛坯尺寸的确定···············································73.5确定切削用量及基本工时····································································113.6时间定额计算及生产安排····································································314专用夹具设计······················································································404.1加工曲拐上端面油孔夹具设计·······························································404.1.1定位基准的选择·······································································404.1.2切削力的计算与夹紧力分析·························································404.1.3夹紧元件及动力装置确定····························································414.1.4钻套、衬套及夹具体设计····························································424.1.5夹具精度分析··········································································444.2加工曲拐上侧面油孔夹具设计·······························································454.2.1定位基准的选择·······································································454.2.2切削力的计算与夹紧力分析·························································454.2.3夹紧元件及动力装置确定····························································464.2.4钻套、衬套及夹具体设计····························································474.2.5夹具精度分析··········································································484.3铣曲拐端面夹具设计··········································································494.3.1定位基准的选择·······································································494.3.2定位元件的设计·······································································494.3.3铣削力与夹紧力计算··································································504.3.4对刀块和塞尺设计·····································································514结论································································································53参考文献·································································································54致谢····································································································55攀枝花学院本科毕业设计摘要I摘要此次毕业设计任务是对3L-10/8空气压缩机曲轴零件的机械加工工艺、夹具的设计,在曲轴零件的加工工艺过程中轴与轴中心线之间要有位置要求,以毛坯轴两端定位先加工两中心孔,以两端中心孔定位再粗、精加工各轴的表面,然后以粗、精后的两轴径定位钻螺纹、铣键槽和铣曲拐端面,采用专用夹具加工两斜油孔,最后粗、精磨各轴。在夹具的设计过程中,主要以V形块和支承板来定位,靠直压板和弹簧来夹紧,钻拐径两孔应采用长型快换钻套,在钻拐径倾斜30的孔时采用平面倾斜的夹具体,在钻拐径倾斜040的孔时使用的是卧式钻床,铣面时2个V形块与铣刀不能干涉,因此V形块高度要降低,夹具设计要方便、简单。关键词曲轴,加工工艺,夹具设计。攀枝花学院本科毕业设计ABSTRACTIIABSTRACTThisgraduationprojectdutyistothe3L-10/8aircompressorcrankcomponentsmachine-finishingcraft,thejigdesign,betweenthecrankcomponentsprocessingtechnologicalprocessmiddleaxleandtheaxlemusthavethepositionrequest,processestwocenterboresfirstbythesemifinishedmaterialsaxisbothsideslocalization,bybothsidescenterborelocalizationagainthick,precisionworkvariousaxessurface.Thenafterthick,theessencetwoaxlediameterlocalizationdrillsthethread,thekeyseatandthemillcrankendsurface.,usestheunitclamptoprocesstwoslantingoilholes,finallythick,correctgrindingvariousaxes.Inthejigdesignprocess,mainlylocatesbyVshapeblockandthesupportplate,dependsonthestraightclampandthespringclamps,drillsturnsdiametertwotobesupposedtouselongtradesquicklydrillsthewrap,whendrillsturnsthediameterinclineholeusestheplaneinclinethejigbody,whendrillsturnsthediameterinclineholeusesisthehorizontal-typedrillingmachine,whenfacemilling2Vshapeblocksandthemillingcuttercannotinterfere,thereforeVshapeblockaltitudemustreduce,thejigdesignmustbeconvenient,besimple.Keywordscrank,processingcraft,jigdesign.