xz25.50变速箱箱体制造工艺规程及专用夹具设计(铣)

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1、www.88doc88.comXZ25.50变速箱箱体制造工艺规程及专用铣床设计摘要本次设计是变速箱箱体零件的加工工艺规程及其专用夹具设计。变速箱箱体零件的主要加工表面是平面及孔系。一般来说，保证平面的加工精度要比保证孔系的加工精度容易。因此，本设计遵循先面后孔的原则。并将孔与平面的加工明确划分成粗加工和精加工阶段以保证孔系加工精度。基准选择以变速箱箱体的输入轴和输出轴的支承孔作为粗基准，以顶面与两个工艺孔作为精基准。主要加工工序安排是先以支承孔系定位加工出顶平面，再以顶平面与支承孔系定位加工出工艺孔。在后续工序中除个别工序外均用顶平面和工

2、艺孔定位加工其他孔系与平面。支承孔系的加工采用的是坐标法镗孔。整个加工过程均选用组合机床。夹具选用专用夹具，夹紧可靠，机构可以不必自锁。因此生产效率较高。适用于大批量、流水线上加工。能够满足设计要求。关键词变速箱；加工工艺；专用夹具www.yanziedu.comwww.88doc88.comAbstractThedesignisaboutthespecial-purposeclampingapparatusofthemachiningtechnologyprocessandsomeworkingproceduresofthegearbox

3、parts.Themainmachiningsurfaceofthegearboxpartsistheplaneandaseriesofhole.Generallyspeaking,toguaranteetheworkingaccuracyoftheplaneiseasierthantoguaranteethehole’s.Sothedesignfollowstheprincipleofplanefirstandholesecond.Andinordertoguaranteetheworkingaccuracyoftheseriesofho

4、le,themachiningoftheholeandtheplaneisclearlydividedintoroughmachiningstageandfinishmachiningstage.Thesupportingholeoftheinputbearingandoutputbearingisastheroughdatum.Andthetopareaandtwotechnologicalholesareasthefinishdatum.Themainprocessofmachiningtechnologyisthatfirst,the

5、seriesofsupportingholefixandmachinethetopplane,andthenthetopplaneandtheseriesofsupportingholefixandmachinetechnologicalhole.Inthefollow-upworkingprocedure,allworkingproceduresexceptseveralspecialonesfixandmachineotherseriesofholeandplanebyusingthetopplaneandtechnologicalho

6、le.Themachiningwayoftheseriesofsupportingholeistoboreholebycoordinate.Thecombinationmachinetoolandspecial-purposeclampingapparatusareusedinthewholemachiningprocess.Theclampingwayistoclampbypneumaticandisveryhelpful.Theinstructiondoesnothavetolockbyitself.Sotheproducteffici

7、encyishigh.Itisapplicableformassworkingandmachininginassemblyline.Itcanmeetthedesignrequirements.Keywordsgearboxmachiningtechnologyspecial-purposeclampingapparatus(在校学生专业做毕业设计，有全套图纸，欢迎联系扣扣：一二六二三零七零四五)www.yanziedu.comwww.88doc88.com目录1序言12.零件加工工艺规程22.1概述22.2零件的作用22.3零件的工艺分析

8、22.4确定工艺方案的原则及注意问题22.4.1粗、精加工分开原则32.4.2工序集中与分散的原则32.4.3制定工艺方案应注意的其它问题42.5确定箱体的生产类型42.6工艺规