毕业论文钻孔齿轮油泵泵体加工工艺及夹具设计.doc

设计(论文)题目：液压泵体零件工艺设计及工艺装备设计学生姓名：孙豪杰指导教师：丁红军二级学院：机电工程学院专业：机械设计制造及其自动化班级：B12113学号：201420088提交日期：年月日答辩日期：年月日摘要本设计是基于齿轮油泵泵体零件的加工工艺规程及一些工序的专用夹具设计。齿轮油泵泵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。基准选择以齿轮油泵泵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，夹紧方式多选用气动夹紧，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：齿轮油泵泵体类零件；工艺；夹具；ABSTRACTThedesignisbasedonthebodypartsoftheprocessingorderoftheprocessesandsomespecialfixturedesign.Bodypartsofthemainplaneofthesurfaceandporesystem.Ingeneral,theplaneguaranteeprocessingprecisionthanthatofholesmachiningprecisioneasy.Therefore,thisdesignfollowsthesurfaceafterthefirstholeprinciple.Planewithholesandtheprocessingclearlydividedintoroughingandfinishingstagesofholestoensuremachiningaccuracy.Datumselectionboxinputshaftandtheoutputshaftofthesupportingholeasaroughbenchmark,withtopwithtwoholesasaprecisiontechnologyreference.Mainprocessesarrangementstosupportholesforpositioningandprocessingthetopplane,andthenthetopplaneandthesupportingholelocationholeprocessingtechnology.Inadditiontothefollow-upprocessesindividualprocessesaremadeofthetopplaneandtechnologicalholelocationholeandplaneprocessing.Supportedholeprocessingusingthemethodofcoordinateboring.Thewholeprocessofprocessingmachinecombinationswereselected.Selectionofspecialfixturefixture,clampingmeansmorechoiceofpneumaticclamping,clampingreliable,institutionscannotbelocked,sotheproductionefficiencyishigh,suitableforlargebatch,lineprocessing,canmeetthedesignrequirements.Keywords:boxtypepartsprocess;fixture;目录TOC\o"1-3"\u摘要PAGEREF_Toc351892325\hIIABSTRACTPAGEREF_Toc351892326\hIII第1章绪论PAGEREF_Toc351892327\h31.1机械加工工艺概述PAGEREF_Toc351892328\h31.2机械加工工艺流程PAGEREF_Toc351892329\h31.3夹具概述PAGEREF_Toc351892330\h41.4机床夹具的功能PAGEREF_Toc351892331\h41.5机床夹具的发展趋势PAGEREF_Toc351892332\h51.5.1机床夹具的现状PAGEREF_Toc351892333\h