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1、气门摇臂轴支座夹具课程设计序一.零件的分析(一)零件的作用该零件是1105型柴油机中的摇臂结合部的气门摇臂轴支座。mm孔装摇臂轴,轴两端各安装一进、排气气门摇臂。mm孔内装一个减压轴,用于降低汽缸内压力,便于启动柴油机,两孔间距mm,可以保证减压轴在摇臂上打开气门,实现减压。该零件通过mm小孔用M10螺杆与汽缸相连。该零件是柴油机气门控制系统的一个重要零件。(二)零件的工艺分析分析零件图纸,图纸的各视图尺寸标注完整,能够表达清楚零件的各个部分,技术条件标注合理,表面粗糙度标注合理,尺寸公差标注完整,能够完整表述加工要求。该零件加工表面分两种,主要是孔的加工,圆柱端面平面加工。将零
2、件图重新绘制在A3图纸上,详见附图。如图一,现将主要加工部分表述如下:1.孔加工该零件共有4个孔要加工,其中mm、mm孔加工要求较高,两孔中间距mm,mm孔中心与底平面距离mm,mm孔中心与底面距离490.05mm。有平行度要求,表面粗糙度1.6,需精加工,mm小孔直接钻出即可,另斜小孔直接钻出。2.面的加工该零件需加工平面为22×36底面精度要求较高,是后续工序的精基准面,需精加工,上端面要求高,粗铣即可。26圆柱两端面粗铣, 28圆柱两端粗糙度要求3.2,要精铣。分析知,该零件的加工应先加工面,孔以面为基准。保证孔中心与底面的距离,平行度。sitesscatteredwork
3、surfaceshouldbedistributed.Brickmasonryconstructionismainlydistributedinthefactory,thefactoryworks.8.3.1materialdumpsinmasonryconstructionmaterialsarepiledupinbatchesinthevicinityoftheconstruction,hand-to-mouth,andmaintainacertainreserve.8.3.2supplymortarHZS60concretemixingstationaftermixingw
4、ith5Tdumptrucktransporttothesurfaceoftheconstruction.8.3.3masonrymaterialtransporttransport5Ttipperwithgravelandothermaterialstransportedtothesurfaceoftheconstruction.8.48.4masonryconstruction....Stone),canbeusedtosew,butitsamountshallnotexceedtheweightofmasonry10%.Stonemasonry:accordingtothe
5、degreeofsmoothnessoftheworksurfaceisdividedintofinestones,semifinestone,crudestoneandstonewoolinfour.StoneprocessingrequirementsshouldbeconsistentwiththesurfaceGBJ50203-20026th.theprovisionsofarticle3.2.8.4.2sand,gravel(1)sandandgravelqualityshallconformtoSD120-84table2.1.2and2.1.3requirement
6、s.Mortarandsmallersandaggregateconcreteused,requireddiameterof0.15~5mm,finenessmodulusfor2.5~3.0,layingstonemortarsand,itsmaximumdiameterisnotmorethan5mm;stonemortarformasonrysand,maximumsizelessthan2.5mm;(2)withtwo-gradedaggregateconcrete,gravelsizefor5~20mmand20~40mm.8.4.3cementandwater(1)m
7、asonryengineeringusingcementandmarkingshallcomplywiththetechnicalprovisionsofsection8.4.theprovisionsofparagraph3.1,arrivalofthecementshouldbevariety,grade,dateofstockpilingseparately,wetlumpsofcement,theprohibitionoftheuse.(2)waterqualitysta