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1、教学课题：车外圆柱面教学目的：掌握轴类零件的车削教学重点、难点：轴类零件的车刀选择教学课时：4课时授课方法：讲授法、实践法教学参考书及教具（含电教设备）：教学课件教学内容：2.1车外圆柱面一、对车刀的要求1.粗车刀(1)前角和后角小些，增加强度，但过小会增加切削力(2)主偏角不宜过小，否则会振动。(3)刃倾角取0-3度(4)主切削刃上磨倒棱br1=（0.5-0.8）ƒ。(5)刀尖处磨直线型过渡刃，偏角=1/2κr，长度=0.5-2mm(6)应磨有断屑槽。2.精车刀feelfreetolistentotheirvoic
2、esandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a24-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%f
3、eedbackrate. ByMayorcallsactivecoordinationtosolvealargenumberofbearsontheimmediateinterestsofthepeopleandissuesofgreatlives,butalsoforleadershipresearchanddecisiontocollectalotofgoodideasandsuggestions,byallsectorsofthecommunityalike.Second,startMunicipalGove
4、rnmentAffairsHallbuilt.OnMay11,webuiltandlaunchedthecity-governmentlobby,weresettledin12departments,strictimplementationoffirstaskingdutysystem,servicesystem,systemofgratuitous,"receiving,internalcoordination,headofthewindowhandle,limitedtimeconcluded"one-stops
5、ervice.Bytheendoftodaytoacceptvarioustypesof3,273,originallyofupto100%. RunningGovernmentAffairsHall,theconvenienceofthemasses,promotingopenGovernment,improvetheinvestmentenvironmentandsolvetheirpracticalproblems,andsodidalotofwork,masses,servethecommunityfort
6、heGovernmenttoplayaverygood"window,link,model".Third,createacitygovernmentpublicaffairsnetwork.WerelyontheGovernmentWebsite,wascompletedonMay24,theprovince'sfirstpublicaffairsnetwork.Over（1）前角和后角大些，锋利，减少摩擦。（2）副偏角较小，可磨修光刃，长度=（1.2-1.5）ƒ。（3）刃倾角去正，一般=3-8度（4）应磨有断屑槽。
7、二、车外圆、平面和台阶的车刀1.90度车刀及其使用又称偏刀，有右偏刀和左偏刀两种右偏刀一般用来车削外圆、端面和右向台阶。左偏刀车削左向台阶和外圆，或又大又短工件的端面。2.45度车刀及其使用feelfreetolistentotheirvoicesandhelpthemassessolveproblems,wewereofficiallyopenedonMay10"12345"Mayorcalls,formulatedrulesandregulations,equippedwithafull-timestaff,a2
8、4-houron-dutysystem,peopletocalltoreceive,reply,action,reminders,feedbackandsoon.Byyearend,handledthecrowdcalls1076,94.7%feedbackrate. ByMayorcallsactivecoordinationtosolve
