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1、汽车后桥壳工艺规程毕业设计摘 要汽车后桥壳是汽车的重要组成部分,它与主减速器、差速器和车轮传动装置组成驱动桥。驱动桥处于动力传动系的末端,其机动功能是增大由传动轴或变速器传来的转矩,并将动力合理的分配给左、右驱动轮,另外驱动桥桥壳是汽车上重要的承载件和传力件。驱动桥的桥壳不仅支承汽车重量,将载荷传递给车轮,而且还承受由驱动车轮传递过来的牵引力、制动力、侧向力、垂向力的反力以及反力矩,并经悬架传给车架或车身。在汽车行驶过程中,由于道路条件的千变万化,桥壳受到车轮与地面间产生的冲击载荷的影响,可能引起桥壳变形或折断。因此,驱动桥壳应具有足够的强度、刚度和良好的动态特性,合理地设计制造驱动桥壳是提高
2、汽车行驶稳定性的重要措施,汽车后桥壳广泛应用于各种车辆当中。所设计的后桥壳夹具可广泛应用于卡车的后桥壳加工中,后桥壳起保护和支撑的作用,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。本次设计的内容主要包括机械加工工艺规程、夹具的设计。结合本次设计零件的特点,在设计中完成工艺规程一套,夹具一套。铣床夹具,采用手动夹紧。通过对汽车后桥壳夹具的学习和设计,可以更好的学习并掌握现代夹具设计与机械设计的全面知识和技能。关键词:汽车后桥;工艺规程;夹具 AbstractAutomobile rear bridge is an important part of the car, with t
3、he main reducer, differential and integral drive axle wheel transmission device. Drive bridge at the end of power transmission lines, the motor function is increased by transmission or gearbox transmission of torque, and power distribution to the left and right driving wheel, and the automobile driv
4、e axle housing is the important load bearing and power transmission. Drive axle housing not only supports the weight of the car, will load to the wheel, and also bear the drive wheels pass over the traction force, braking force, lateral force, vertical force reaction force and torque, and the suspen
5、sion to the frame or body. In the process of moving vehicle, the myriads of changes due to road conditions, the bridge shell under wheel and the ground produces effect of impact load, may cause the axle casing deformation or breaking. Therefore, drive axle housing should have enough strength, stiffn
6、ess and good dynamic characteristics, reasonable design and manufacture of drive axle housing is the important measure to improve vehicle stability, auto rear bridge shell is widely used in various vehicles.The design of rear axle housing clamp can be widely used in truck rear axle shell processing,
7、 rear axle housing for protection and support role, its main working surface to face circular, flat flange, spring seat, and the inner hole of the plane.This design content mainly includes the process, fixture design. Combined with the design of parts of the characteristics, in the design of a set o
8、f complete procedure, a set of clamps. Milling fixture, manually clamping. The automobile rear axle housing clamp study and design, can be a better learning and mastery of modern design and the mechanical design of the comprehensive knowledge and skills.Key words: the rear axle of automobile;the cra
9、fu analuses;machine tool fixture目 录摘 要 IAbstract II第 1 章 绪论 11.1 机床夹具及其组成 11.1.1 概述 11.1.2 机床夹具的组成 11.2 机床夹具的分类 21.3 机床夹具的国内外发展现状 21.3.1 国内发展现状 31.3.2 国外发展现状 31.4 机床夹具的发展方向 4第 2 章 后桥壳工艺方案总体设计 62.1 汽车后桥发展趋势 62.1.1 我国汽车后桥制造业的现状及其发展趋势 62.1.2 汽车后桥壳体的构造及性能要求 62.2 后桥壳零件的分析 72.2.1 后桥壳的作用 72.2.2 后桥壳的工艺分析 72
10、.2.3 后桥壳生产类型及毛坯制造形式的确定 92.2.4 加工后桥壳基面的选择 9第 3 章 后桥壳机械加工工艺规程设计 113.1 机械加工工艺路线的选择 113.1.1 工艺方案拟定 113.1.2 工艺方案比较分析 123.1.3 加工余量、工序尺寸、毛坯尺寸的确定 133.2 确定切削用量及机动时间 143.2.1 工序一的切削用量及机动时间 143.2.2 工序二的切削用量及机动时间 193.2.3 工序三的切削用量及机动时间 203.2.4 工序四的切削用量及机动时间 233.2.5 工序五的切削用量及机动时间 243.2.6 工序七的切削用量及机动时间 253.2.7 工序八的
11、切削用量及机动时间 273.2.8 工序九的切削用量及机动时间 293.2.9 工序十的切削用量及机动时间 303.2.10 工序十一的切削用量及机动时间 313.2.11 工序十二的切削用量及机动时间 33第 4 章 铣床夹具设计 364.1 确定定位方案 364.1.1 工件的加工工艺分析 364.1.2 定位方案的确定,设计定位元件 364.2 夹紧机构的设计 374.2.1 确定夹紧方式 374.2.2 定位误差分析 384.2.3 夹紧元件强度校核 394.3 夹具体的设计 394.4 夹具体操作的简要说明 40结 论 41致 谢 42参考文献 43CONTENTSAbstract
12、IIChapter 1 Introduction 11.1 Machine tool fixture and its composition 11.1.1 Summarize 11.1.2 The form of machine tool fixture 11.2 The classification of machine tool fixture 21.3 The development at home and abroad of modern machine tool fixture 21.3.1 Development in china31.3.2 Development in fore
13、ign countriy 31.4 Development direction of modern machine tool fixture 4Chapter 2 The design of overall program 62.1 The development trend of automobile rear bridge 62.1.1 The current situation and development trend of domestic automobile rear bridge manufacturing 62.1.2 Automobile rear bridge housi
14、ng structure and performance requirements 62.2 The analysis of automobile rear bridge housing parts 72.2.1 Automobile rear bridge function 72.2.2 Automobile rear bridge process analysis 72.2.3 Automobile rear bridge type of production and the manufacture of blank forms 92.2.4 The selection of automo
15、bile rear bridge processing base9Chapter 3 The design of process 113.1 The selection of machining process route 113.1.1 The program of process 113.1.2 The comparative and analysis of process program 123.1.3 The determination of machining allowance, process and blank size133.2 The determination of cu
16、tting parameters and basic time 143.2.1 The cutting parameters and basic time of the first process143.2.2 The cutting parameters and basic time of the second process 193.2.3 The cutting parameters and basic time of the third process203.2.4 The cutting parameters and basic time of the fouth process233.2.5 The cutting parameters and basic time of the fifth process243.2.6 The cutting paramete
