1、 I 汽车后桥壳体工艺卡具设计 摘 要 毕业设计的课题基本分为两大类，即卡具设计和机床设计。本课题所涉及的是第一 类，设计任务为汽车后桥壳体的工艺工装设计，在壳体内部装有主传动器、差速器、半 轴等传动机构。 壳体起保证和支撑的作用，其主要加工表面为端面外圆、法兰平面、弹簧座平面、 以及内孔等。 本次设计主要包括工艺规程、夹具、刀具和量具的设计。此次设计共分三个阶段， 即： （1）毕业实习阶段（2）课题设计阶段（3）考核答辩阶段。结合本次设计零件的特 点，在设计中完成工艺规程一套，夹具两套： （1）铣床夹具（2）钻床夹具，其中，前 者为手动夹紧。本设计有铣床夹具图一张（A0） ，钻床夹具图纸一张
2、（A0） ，铣床夹具 图中间部分一张（A1） ，另外还有两张 A3 图纸，基本完成老师所交给的任务。 关键词：汽车后桥；工艺分析；卡具设计；设计任务 II Automobile driving axle shell process fixture design ABSTRACT The subject of the graduation project is divided into three big classes,namely the frock designing type of craft ,making up the designingtype of lathe and compe
3、r subjects basically.What this subject involved is the first kind,designing the task for the rear axle of automobile,the craft frock of the shell is designed.Equipped with the organizations of the transmission,such as main hammer mechanism actuator,differential mechanism,semi-axis,ect,within the she
4、ll.The shell plays a role in guatanteeing and support,it processes flange,spring seat plane,and interior hole round for outside of the terminal surface of surface,ect,mainly。 This design includes the design of rules of craft,jig,cutter and measuring tool mainly.This design divides three stages altog
5、ether,namely:(1)Graduation field work stage(2)Ddeign phase of subject(3)Examine the stage of replying.Combine this charateristic of designing the part,finisshes one set of rules of craft in the design,two sets of jigs:(1)Jig of the milling machine(2)The jig of the drilling machine,among them,the for
6、mer,in order to clamp manually.Still design the cutter sepatately according to the task book in additionOne milling cutter is with measuring,finish drawing amount nearlu 5 altogether,finish the task that a teacher assigns basically. Key word:The rear axle of automobile；the crafu analuses；designs the task III 目录 1 前言 . 1 1.1 我国汽车后桥制造业的现状及其发展趋势 . 1 1.2 汽车后桥壳体的构造 1 1.3 汽车后桥壳体的性能要求 . 1 2 零件的分析 3 2.1 零件的作用 . 3 2.2 零件的工艺分析 4 2.3 生产类型的确定 4 2.4 确定毛坯的制造形式 4 2.5 基面的选择 . 5 3 械加工工艺路线 6 3.1 工艺方案 . 6 3.2 工艺
