全套图纸100。需要加1993168580
参考文献
[1]陶建民.万向节和传动轴.北京理工大学出版社，1997.12. [2]韩永生.工程材料性能与选用.化学工业出版社,2004.8. [3]王宝玺，贾庆祥.汽车制造工艺学.机械工业出版社，2007.3. [4]吕炎.锻模设计手册[M].机械工业出版社，2006.
[5]洪慎章，李名尧.锻造使用数据速查手册[M].机械工业出版社，2007. [6] 刘惟信.汽车设计[M].北京:清华大学出版社,2001.
[7]王声堂.中国汽车零部件制造业发展现状.中国金属加工在线 2009（2）. [8] 陈家瑞.汽车构造[M].北京:人民交通出版社，2001.
[9]《汽车工程手册》编辑委员会.汽车工程手册[M].北京:人民交通出版社,2001.
[10]成大先．机械设计手册[M]．北京:化学工业出版社，2004. [11]张利平.工程材料及制造工艺基础.北京：机械工业出版社，2005. [12]王显正.轴类零件设计及工艺路线制定.上海交通大学学报，1998,(12) . [13]冯晋祥.机械设计.北京：人民交通出版社.
[14]黄声显.汽车制造工艺设计.北京：人民交通出版社，2005.
[15]李军.《机床夹具设计》和《机制工艺》课程综合探讨.机械职业教育。2008（9）. [16]Veryzer R W,Hutchinson J W. The Flexibility of a Tubular Welded Joint in a Vehicle Frame. SAE Transactions740340.
[17]CHEN demin,LIU xueyuan,HU jibin, Fracture of Shifting-Yoke in the Gear-Box for a Wheeled Chariot Based on Miner’s Accumulated Damage Theory.汽车工程师网.
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全套图纸100。需要加1993168580
致 谢
我毕业设计的题目是：CA1091传动轴凸缘叉加工工艺及夹具设计。设计的这期间，遇到过很多难点，让我深感所学知识的欠缺、知识的重要性！我清醒的认识到，由于理论水平和精力有限，疏漏和不当之处在所难免，希望得到各位老师的批评指正，使我所学到的理论知识和实践经验更好的相结合并应用到实际工作中去。
在此，我特别要感谢的是我的指导老师纪峻岭老师，设计期间，我不知道从什么地方下手，对一些设计的步骤根本不知道怎么安排，怎么设计。老师给我们详细讲解了设计应注意的问题，让我们先从分析零件图开始。
纪老师对我细心指导、讲解，向我推荐相关资料，将自己收藏的书借给我。在设计刚开始时，我对部分知识很不熟悉。纪老师细心指导，帮我找到很多相关知识的书籍及材料，使我受益匪浅。纪老师还自己在网上为我查找相关资料！此次设计，我最大的难点是在夹具设计这块，纪老师为我讲解夹具装配图及零件图，每个细节都讲解得很详细，而且结合工厂实际情况加以讲解，简明易懂，对我以后的工作也有很大帮助！在此，我深表谢意！纪老师严谨的治学态度、广博的知识、诲人不倦的师长风范对我产生了深远影响，使我获益匪浅！
另外，我还要感谢大学里所有的授课老师，从他们那里我学到了众多的专业知识，使我大学四年得以充实！同时，我还想感谢院、系领导及各位老师为保证这次毕业设计的顺利完成所做的努力和对我们所给予的关心与帮助！总之我要感谢这次给予过我帮助的所有人！
谨祝老师们：工作顺利！生活开心！
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全套图纸100。需要加1993168580
附 录
Fork Shaft Lugs fixture design
Shell group processing according to the results of the machine and the group chosen type design group clamps, group clamps Realize that the group process, favorable to reasonable design, if no group clamps or design group clamps, convenient adjustment group processing can realize smoothly.
The machine tool's fixture priority is to ensure machining accuracy, especially that of the machining process and positioning surface and processed surface between the position precision. After using this fixture mainly rely on precision tools and fixtures to ensure no longer rely on workers, the technical level. Second is to improve labor productivity, reduce cost, use fixture after is crossed, can reduce the auxiliary time, and easy to implement and multistage process. In modern times, is widely used in the machine tool's fixture etc mobile pneumatic, hydraulic clamping device, can make the assistant time do step.
In the group technology group clamps are under the guidance of the principle, process and design for the implementation of the group, and special fixture Compared with the design group clamps, not for a certain parts of a process, but a group of some parts, Which group clamps to adapt to all parts of the group parts in a process of processing.
Design of the key and difficult.
When the workpiece in machine processing, the first to make workpiece in machine or a fixture in the correct position, it is the location, to prevent the process of cutting force or other forces destroyed the correct position, still must be fastened clamping workpiece, this is the clamping workpiece position and clamping workpiece installation process is called. Due to the workpiece position and orientation error, error called for clamping deformation and the error is called clamping error. Positioning error and clamping workpiece installation error named error.
Because of this all parts for 21 kinds of workpieces, so the scheme is key to determine the fixture clamping deformation control at will The smallest. While clamping deformation control cannot rely on operators to realize in the past shell parts and machining by small and reliable clamping force to reduce clamping deformation, this will inevitably produce
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全套图纸100。需要加1993168580
adverse product. In the introduction of domestic product technology at the same time, don't notice the processing technology, especially the shell parts, production batch processing, different, use equipment that needs are different, clamping orientated in the introduction, digestion and absorption and must therefore in the design process, according to the actual needs of clamping positioning in blank, add uniform positioning and clamping point.
The selection principle of orientated may not deviate from the principle of localization, but at the time must note in the selection, I truly, Planar 3 point must form a stable support, namely the gravity of the triangle, near the workpiece center turn against restrictions freedom 2 some farther, the more accurate positioning.
In parts of the shell, the key process is first step - graphic processing. According to the production batch and parts The structure and the precision, some parts processing, some parts of planar alone on a plane and hole machining process. Graphic processing quality directly cause the whole process, the success or failure. Surface processing, mainly is bad, the flatness of the flatness of the next procedure of processing produce larger clamping deformation, clamping, precision parts in tolerance, loosen, clamping displacementrestoring, precision parts will change, and with regularity. Surface processing by fixture causes adverse has two main: 1, the location selection is not reasonable, 2, clamping point is not reasonable. Therefore, the shell parts processing, surface of fixture design becomes important.
In the traditional processing, for milling machining processes, plane commonly, add a few auxiliary support to prevent due to the distortion caused by cutting force influence, because high-speed cutting machining precision cutting force, so, no need additional support commonly.
In the face of processing, must consider the process of flexibility, can use the car is not to milling machining. In clamping point, on the choice of pay attention to the following problems:
1. By 3 strong point to form a support to support workpiece surface, can avoid blank piece of planar degree due to the deviation caused the machined surface flatness, and supporting and clamping point should avoid a moment, and led up distortion. Because of clamping workpiece elastic deformation, loosen the clamping after springback, can cause planar degree, it is super flatness of the main reason.
2. The best point and clamping point is the sphere, ensure all, otherwise, it will point
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全套图纸100。需要加1993168580
is because the plane deformation caused by torsion blank clamping deformation. The deformation will also cause planar degree.
3. When the workpiece surface cannot clamping, can use flank clamping, if clamping parts is deduced.and, must increase in the block, to avoid clamping deformation. The clamping way, had better not use or using other techniques, or request processing plane designers in clamping point increase in design.
4. Because of the high-speed machining cutting force and deformation of more than 30% reduction processing, generally recommend that don't add additional support can guarantee machining accuracy.
5. 2 limit rotational degree of freedom, the distance as far as possible, orientated if blank has note hole, 2 (note hole taper pin location using elastic is the most simple positioning scheme.
In the design of the group clamps, considering the problems at the same time, we also need to consider many parts adopt a fixture, and replacing time processing varieties in a short time to finish. So the fixture design must consider quick change. This fixture is typical of six principles of fixture, positioning clamping adopt pneumatic clamping screw. This fixture locating adopts point positioning forms, interface, nearly may also used clamping point, ensure orientated and clamping point in the same line, this fixture milling face results in the plane degrees below, the precision of 0.02 from the Angle of subsequent processing position from the Angle of use or can be very well meet the requirements.
In addition, in parts processing process, for a process, whether to use fixture, use what type of clip What class, and the use of fixture in jig design must be carefully considered before. Besides the machining quality assurance from view, should also do economic analysis to ensure that the design of fixture in the economy.
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