75拖拉机变速箱机械加工工艺规程设计75拖拉机变速箱机械加工工艺规程设计本科毕业设计（论文）题目75拖拉机变速箱壳体机械加工工艺规程设计姓名XXXXXX班级机械设计制造及其自动化（本科二班）学号2009330院（系）机械工程学院指导教师李明郑州科技学院机械工程系二○一三年五月二十日PAGE\*MERGEFORMATIIPAGE\*MERGEFORMATI75拖拉机变速箱壳体工艺规程设计摘要机械制造业是一个国家技术进步和社会发展的支柱产业之一，无论是传统产业，还是新兴产业，都离不开各式各样的机械设备。这次毕业设计就是选择了这样一个课题——75拖拉机变速箱体机械加工工艺规程设计。使生产对象（原材料，毛坯，零件或总成等）的质和量的状态发生直接变化的过程叫工艺过程，如毛坯制造，机械加工，热处理，装配等都称之为工艺过程。在机加工工艺编制方面，主要通过仔细分析产品零件图和相关技术要求，查阅箱体类零件相关资料，结合暑假实习经历等等，考虑了的工艺结构要求、批量要求、经济性、可行性等多方面因素，最终安排了19个工序来完成变速箱体的加工，其中包括各道工序的加工方法，机床、刀具、辅具、量具的选择，基准面的选取，定位和夹紧方案的拟定。关键字：变速箱体工艺路线工序AbstractPAGE\*MERGEFORMAT1Designoftechnicsprocessesforthegearboxcasingof75tractorABSTRACTMachinerymanufacturingisoneofthepillarindustrieswhichshowanation’sdevelopmentoftechnologyandsociety.Bothtraditionalandburgeoningindustriescan’tbeseparatedfromveritiesofmechanicalequipment.Thisdisquisitionhadjustselectedsuchatask—tostudythemachiningcraftandthefixtureforheavyboringshaftingbearingholesofDongfanghongtractor.Makethestateofqualityandquantityofobjects(suchasrawmaterials,semifinishedproduct,componentorassembly)changesdirectlyintheprocessiscalledcraftprocess,suchasblankmanufacturing,machining,heattreatment,assemblyandsoonalliscalledprocess.Intheaspectofmachiningcraft,partdrawingandthetechnologicalrequestwerethoughtover，withthehelpofsomeinformationaboutthemachiningcraftofpartssuchasboxesitisarrangedtoproducethepartineighteenstepswhichincludetheinformationonwhatmeanstouse，whichmachinetools,whatfixtures,assisttoolsandmeasuretoolsneededineachstep.Thenselecteddatumplaneforeachstep,studiedoutorientationandclampingschemeforeachstep.intheaspectoffixturedesigning,Ihaddesignedasetoffixturefortheheavyboringoftheshaftingbearingholes.Aftersomeanalyzingandcalculating.Keyword:Gearboxcasing,Technicsprocess,Workingprocedure75拖拉机变速箱机械加工工艺规程设计PAGE\*MERGEFORMATIVPAGE\*MERGEFORMATIII目录TOC\o"1-3"\h\uHYPERLINK\l_Toc7480摘要PAGEREF_Toc7480IHYPERLINK\l_Toc31984ABSTRACTPAGEREF_Toc31984IIHYPERLINK\l_T