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1、本科畢業(yè)設(shè)計(論文)說明書摘要用與車外圓、端面和鏜孔等加工的機床叫車床。車削很少在其他種類的機床上進行,因為其他機床都不能像車床那樣方便地進行車削加工。由于車床除了用于車外圓外還能用于鏜孔、車端面、鉆孔和鉸孔,車床的多功能性可以使工件在一次定位安裝中完成多種加工。這就是在生產(chǎn)中普遍使用各種車床比其他種類的機床都要多的原因。車床的主要部件:床身、主軸箱組件、尾架組件、拖板組件、變速齒輪箱、絲杠和光杠大多數(shù)車床的刀架安裝在復(fù)式刀座上,刀座上有底座,底座安裝在橫拖板上。可繞垂直軸和上刀架轉(zhuǎn)動;上刀架安裝在底座上,可用手輪和刻度盤控制一個短絲杠使其前后移動。轉(zhuǎn)盤用螺栓與中滑板緊固在一起,松開螺母,可
2、使其在水平面內(nèi)扳轉(zhuǎn)任意角度,小滑板沿轉(zhuǎn)盤上的導(dǎo)軌可以做短距離的移動,當(dāng)轉(zhuǎn)盤扳轉(zhuǎn)某一角度后,小滑板便可帶動車刀做相應(yīng)的斜向移動。普通車床的轉(zhuǎn)盤位于上刀架和下刀架之間,它是上刀架的導(dǎo)向件,當(dāng)需要用小刀架車錐面時,可通過賺盤相對于下刀架的轉(zhuǎn)動來調(diào)整錐角,本說明書堆車床轉(zhuǎn)盤零件的作用,零件的工藝過程,夾具設(shè)計做了比較系統(tǒng)完整的分析和論證。對工藝規(guī)程的設(shè)計做了詳細(xì)的說明,并制定了合理的加工工藝路線,編制了一整套的機械加工工藝卡片。對關(guān)鍵工序的加工余量、工序尺寸、工序公差、切削用量等進行了計算。對機械加工工藝過程中需要的夾具具進行了設(shè)計分析,保證整個工藝過程的完整性。關(guān)鍵詞:金屬切削;轉(zhuǎn)盤;精度;工藝規(guī)
3、程;公差49本科畢業(yè)設(shè)計(論文)說明書AbstractThebasicmachinesthataredesignedprimarilytodoturning,facingandboringarecalledlathes.Verylittleturningisdoneonothertypesofmachinetools,andnonecandoitwithequalfacility.Becauselathecandoboring,facing,drilling,andreaminginadditiontoturning,theirversatilitypermitsseveraloperati
4、onstobeperformedwithasinglesetupoftheworkpiece.Theseaccountsforthefactthatlathesofvarioustypesaremorewidelyusedinmanufacturingthananyothermachinetool.LatheConstruction:Theessentialcomponentsofalathearedepictedintheblockdiagram.Thesearethebed,headstockassembly,tailstockassembly,carriageassembly,quic
5、k-changegearbox,andthelea&crewandfeedrod.Onmostlathesthetoolpostactuallyismountedonacompoundrest.Thisconsistsofabase,whichismountedonthecrossslidesothatitcanbepivotedaboutaverticalaxis,andan.uppercasting.Theuppercastingismountedonwaysonthisbase.sothatitcanbemovedbackandforthandcontrolledbymeansofas
6、hortleadscrewoperatedbyahand-wheelandacalibrateddial.Theturntableisfastenedtothemiddleslipboardbybolts.Loosethenut,wecanmaketheturntablerotatedinthelevelfornomaterwhatangle.Theminorslipboardcanmovealongtherailofturntableforashortdistance.Whentheturntablerotatesanangle,theminorslipboardwillmakeaside
7、longdisplacementcarrying.Generally,theturntablelocatesbetweentheupanddownkniferest,itistheupkniferest’sorientedmember.Whenwewanttocuttheconebyusingtheminor,wecanrotatetheturntable.Thisessaywillcoveranintegr