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1、青岛理工大学琴岛学院本科毕业设计说明书(论文)摘要机械产品的生产过程是从原材料开始到成品出厂的全部劳动过程。它包括了毛坯的制造,零件的机械加工和热处理,机器的装配、检验、测试、和涂装等过程。机械加工工艺是实现产品设计,保证产品质量,节约能源,降低消耗的重要手段,是生产中最活跃的因素。它既是构思和想法,又是实在的方法和手段,并落实在由工件、机床、夹具所构成的工艺系统中。在制定工艺过程中,要确定各工序的安装工位和该工序需要的工步,加工该工序所需的机床,进给量,切削深度,主轴转速和切削速度,该工序的夹具,刀具及量具,还有走刀次数和走刀长度
2、,最后计算该工序的基本时间,辅助时间和工作地服务时间。夹具是机床上装夹工件的一种装置,使工件相对于机床和刀具有一个正确的位置,并在加工过程中保持该位置不变。在使用夹具装夹工件时,工件相对于刀具及机床的位置精度由夹具保证,不受工人技术水平的影响,使一批工件的加工精度趋于一致。使用夹具装夹工件方便、快速,工件不需要划线找正,可显著地减少辅助工时,工件在夹具中装夹后提高了工件的刚性,可加大切削用量;可使用多件、多工位装夹工件的夹具,并可采用高效夹紧机构,进一步提高劳动生产率。关键词:工艺,工序,工步,加工余量,定位方案,夹紧力40青岛理工
3、大学琴岛学院本科毕业设计说明书(论文)AbstractMechanicalproductionprocessfromrawmaterialtofinishedproductallthelaborprocess.Itincludesablankmanufacturing,partsmachiningandheattreatment,machineassembly,inspection,testing,andpaintingandotherprocesses.Processisthemostactivefactorofproductio
4、n.Machiningprocessistoachieveproductdesign,productquality,saveenergyandreduceconsumptionoftheimportantmeansisthemostactivefactorofproduction.Itisbothaconceptandideas,butalsorealwaysandmeans,andtoimplementintheworkpiece,machinetools,fixturesposedbytheprocesssystem.Inthe
5、developmentprocess,wemustdeterminetheinstallationprocessstationandtheprocessneedsfurtherwork,processingoftheprocessoflocomotivesandmachinetools,feedrate,cuttingdepth,spindlespeedandcuttingspeed,theprocessofthefixture,toolandgauge,therearethecuttingtimesandtoolpathlengt
6、h,thefinalcalculationofthebasictimeoftheprocess,supporttimeandefforttoservice.Machinetoolclampingfixtureisadevicetotheworkpiecerelativetothemachinetoolandcuttingtoolworkpiecehaveacorrectposition,andduringprocessingtomaintainthesameposition.Usingthefixtureworkpiececlamp
7、ingoftheworkpiecerelativetothelocationofmachinetoolsandprecisionguaranteedbythefixture,withouttechnicalskills,whichmakesthenumberofworkpiecemachiningprecisionofline.Workpiececlampingfixtureeasytouse,fast,crossedtheworkpiecedoesnotneedtofindis,cansignificantlyreducethea
8、uxiliaryworkinghours,afterclampingtheworkpieceinthefixturetoimprovetherigidityoftheworkpiececanbeincreasedcutting;can