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I毕业设计课题：齿轮泵体工艺设计和钻2-φ18孔夹具设计专题：专业：机械制造及自动化学生姓名：班级：学号：指导教师：完成时间：II摘要本设计是基于齿轮泵体零件的加工工艺规程及一些工序的专用夹具设计。齿轮泵体零件的主要加工表面是端面及孔系。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。夹具选用专用夹具，夹紧方式多选用手动夹紧，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：齿轮泵体类零件；工艺；夹具；全套图纸，加153893706IIIABSTRACTThedesignisbasedonthebodypartsoftheprocessingorderoftheprocessesandsomespecialfixturedesign.Bodypartsofthemainplaneofthesurfaceandporesystem.Ingeneral,theplaneguaranteeprocessingprecisionthanthatofholesmachiningprecisioneasy.Therefore,thisdesignfollowsthesurfaceafterthefirstholeprinciple.Planewithholesandtheprocessingclearlydividedintoroughingandfinishingstagesofholestoensuremachiningaccuracy.Datumselectionboxinputshaftandtheoutputshaftofthesupportingholeasaroughbenchmark,withtopwithtwoholesasaprecisiontechnologyreference.Mainprocessesarrangementstosupportholesforpositioningandprocessingthetopplane,andthenthetopplaneandthesupportingholelocationholeprocessingtechnology.Inadditiontothefollow-upprocessesindividualprocessesaremadeofthetopplaneandtechnologicalholelocationholeandplaneprocessing.Supportedholeprocessingusingthemethodofcoordinateboring.Thewholeprocessofprocessingmachinecombinationswereselected.Selectionofspecialfixturefixture,clampingmeansmorechoiceofpneumaticclamping,clampingreliable,institutionscannotbelocked,sotheproductionefficiencyishigh,suitableforlargebatch,lineprocessing,canmeetthedesignrequirements.Keywords:parts;fixture;IV目录摘要·····································································································IIABSTRACT····························································································III第1章绪论·····························································································11.1机械加工工艺概述··························································································································11.2机械加工工艺流程···························································································································11.3夹具概述···········································································································································21.4机床夹具的功能·······························································································································31.5机床夹具的发展趋势·······················································································································31.5.1机床夹具的现状··························································································31.5.2现代机床夹具的发展方向··············································································4第2章加工工艺规程设计···········································································62.1零件的分析······································································································································62.1.1零件的作用·······························································································62.1.2零件的工艺分析·························································································62.2齿轮泵体加工的主要问题和工艺过程设计所应采取的相应措施··············································72.2.1孔和平面的加工顺序···················································································72.2.2加工方案选择·····························································································72.3齿轮泵体加工定位基准的选择······································································································82.3.1粗基准的选择····························································································82.3.2精基准的选择····························································································82.4齿轮泵体加工主要工序安排··········································································································82.5机械加工余量、工序尺寸及毛坯尺寸的确定·············································································112.6选择加工设备及刀、量具··············································································································112.7确定切削用量及基本工时（机动时间）·····················································································12第3章钻2-φ18孔夹具设计·······································································213.1夹具的夹紧装置和定位装置·······································································································213.2夹具的导向···································································································································22V3.3钻孔与工件之间的切屑间隙·······································································································233.4钻模板···········································································································································233.5切削力及夹紧力的计算···············································································································243.6误差分析与计算·························································································