套筒工艺及铣床夹具设计(2)

ABSTRACT

Technology is the technology research of mechanical processing technology and fixture design, has a strong practice, requirements should be closely combined with the production practice in the learning process, and it also has the very strong comprehensive. The graduation design topic is the preparation technology of the sleeve parts processing and milling fixture design, the main contents are as follows: firstly, the analysis of parts, according to the specific part drawing processing requirements, determine the manufacture of blank shape and size. The second step, the selection of base, determine the processing of crude and refined baseline benchmark. According to the chosen benchmark, creating process flow scheme, the third step, according to process routes have been identified, select the processing equipment and process equipment, then determine the amount of cutting each work step. In the process of mechanical design and manufacturing industries in a wide variety of applications, for processing a fixed object, so that possession of the correct position, to receive a construction techniques and equipment, known as the fixture. The jig design is the fixture design of arc milling sleeve R10mm. Fixture design first carries on the analysis to the original data, make clear of the design requirements and intentions, and then put forward specific positioning, clamping, clamping tool setting scheme and general structure of concrete. In order to ensure the design reliability, but also on the clamping force and precision was analyzed. At the same time the design standard and the locating datum coincide, ensure the machining precision and position tolerance groove side. Then determine the structure scheme of fixture, calculation and positioning error analysis and began cutting force, clamping force. Finally, the whole design process for the design specifications and drawings, thus the whole design is basically completed.

Keywords: sleeve, machining, milling fixture

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目录

第一章 绪论 ................................................................................................................................. 1 第二章 套筒零件图分析........................................................................................................... 3

2.1 套筒零件图的分析 ..................................................................................................... 3 2.1.1 套筒结构特点.................................................................................................................. 3

2.1.2 套筒作用 ......................................................................... 错误！未定义书签。 2.1.3 套筒工艺分析 ................................................................ 错误！未定义书签。

第三章 套筒工艺过程分析 .................................................................... 错误！未定义书签。

3.1确定毛坯 ...................................................................................... 错误！未定义书签。

3.1.1 毛坯选择 ......................................................................... 错误！未定义书签。 3.1.2 绘制毛坯图 .................................................................... 错误！未定义书签。 3.2拟定工艺路线 ............................................................................. 错误！未定义书签。

3.2.1 各表面加工方法 ........................................................... 错误！未定义书签。 3.2.2 定位基准的选择 ............................................................................................. 9 3.2.3 加工阶段的划分 ........................................................................................... 10 3.2.4 工序集中与分散 ........................................................................................... 11 3.2.5 热处理工序安排 ........................................................................................... 12 3.2.6 辅助工序的安排 ........................................................................................... 12 3.2.7 重要工序的分析 ........................................................................................... 12 3.3 加工余量的确定 ........................................................................................................ 13 3.4 尺寸链计算 ................................................................................................................. 14 第四章 铣床夹具设计 ............................................................................................................. 16

4.1 定位装置的设计 ............................................ 16 4.2夹紧装置的设计 ......................................................................................................... 16 4.3绘制夹具总图 ............................................................................................................. 16

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4.4夹具操作简述 ..................................................................................................................... 17 4.5夹具精度校核 ..................................................................................................................... 17 第五章 结论 ............................................................................................................................... 19 参考文献 ...................................................................................................................................... 20 致 谢 ............................................................................................................................................. 21 毕业小结 ...................................................................................................................................... 32 附 录 ............................................................................................................................................. 34

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第一章绪论

夹具：机械制造过程中用来固定加工对象，使之占有正确的位置，以接受施工或检测的装置。

铣床夹具：均安装在铣床工作台上，随机床工作台作进给运动。主要由定位装置、夹紧装置、夹具体、连接元件、对刀元件组成。铣削加工时，切削力较大，又是断续切削，振动较大，因此铣床夹具的夹紧力要求较大，夹具刚度、强度要求都比较高。本设计主要采用AutoCAD软件对套筒R10圆弧快速夹具设计.根据零件图的特点对套筒R10圆弧快速夹具进行设计，首先是确定套筒R10圆弧快速夹具的大致模样，夹具设计的几点要求是保证工件的加工精度、提高生产效率、工艺性能好、使用性能好、经济性好，夹紧可采用偏心轴夹紧，通过偏心轴旋转的不同偏心距来夹紧与松弛。设计好后，对夹具进行绘制。夹具设计其实也就是对加紧和定位的设计，只要夹紧设计定位好后，基本上夹具就完成了，但这只是基本，还要对他进行别的设计，比如首先保证夹具的安全性、工件的加工精度、提高生产效率、工艺性能好、使用性能好、经济性好，又比如可浮动、可联动、可增力、可自锁、快速装夹等等，这些都很重要，所以设计要从各方面不同的角度考虑夹具设计这个问题。

工艺规程：是指导施工的技术文件。一般包括以下内容：零件加工的工艺路线，各工序的具体加工内容，切削用量、工时定额以及所采用的设备和工艺装备等。

1．工艺规程是工厂进行生产准备工作的主要依据，产品在投入生产之前要作大量的生产准备工作，包括原材料和毛坯的供应，机床的配备和调整，专用工艺装备的设计制造，核算生产成本以及配备人员等，所有这些工作都要根据工艺规程进行。

2．工艺规程是企业组织生产的指导性文件

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工厂管理人员根据工艺规程规定的要求，编制生产作业计划，组织工人进行生产，并按照工艺规程要求验收产品。

3．工艺规程是新建和扩建机械制造厂（或车间）的重要技术文件 新建和扩建机械制造厂（或车间）须根据工艺规程确定机床和其他辅助设备的种类、型号规格和数量，厂房面积，设备布置，生产工人的工种、等级及数量等。

此外，先进的工艺规程还起着交流和推广先进制造技术的作用。典型工规程可以缩短工厂摸索和试制的过程。

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