倒档拨叉零件图A3
摘要
制造业飞速发展的当下，复杂的零件以及不规则的零件是越来越多，零件的尺寸要求和公差要求也是越来越高。之前的通用夹具已经不能够满足当下制造业的发展了，为了加工这些不规则的零件，专用夹具的作用显得相当的重要。
本文设计的倒挡拨叉零件，就是一个构造复杂，形状不规则的零件。倒挡拨叉是典型的叉架类零件，跟操作装置零件一起使用，将滑动齿轮拨动，这样输出轴就可以实现倒转。配合面Ф14H9、14H13槽还有下拨叉对精度都是有需求的。本次设计的主要任务是完成工件加工工艺规程的设计以及设计一套铣开档23平面的铣床专用夹具。
加工工艺的设计，其主要的内容包括：零件结构的分析，加工面加工精度的分析，生产类型工件制造方式的确定等等。专用夹具的设计主要的设计内容包括：设计定位、夹紧方案，选择定位、夹紧元件；选择对刀块；设计夹具体等等。本次设计的专用夹具使用在X52K立式铣床上。
关键词：专用夹具、倒档拨叉、加工工艺、铣开档23平面、X52K
Abstract
With the rapid development of the manufacturing industry, more and more complex parts and irregular parts are becoming more and more, and the dimensional requirements and tolerance requirements of the parts are getting higher and higher. The previous general-purpose fixtures have not been able to meet the development of the current manufacturing industry. In order to process these irregular parts, the role of special fixtures is quite important.
The reverse fork part designed in this paper is a partwith complicated structure and irregular shape. The reverse shift fork is a typical fork-type part that is usedwith the operating device parts to toggle the sliding gear so that the output shaft can be reversed. The matchingФ14H9, 14H13 slot and the lower fork are all required for accuracy. The main task of this design is to complete the design of theworkpiece machining process specification and design a special milling cutter for the 23-plane milling machine.
The main contents of the design of the processing technology include: analysis of the part structure, analysis of the processing precision of the machined surface, determination of the manufacturing method of the production typeworkpiece, and so on. The main design contents of the special fixture include: design positioning, clamping scheme, selection of positioning, clamping components; selection of the cutter block; design clip specific and so on. The special fixtures for this design are used on the X52Kvertical milling machine.
Keywords: special fixture, reverse shift fork, machining process, milling open 23 plane, X52K
目录
摘要I
Abstract II
1绪论1
1.1本课题研究的目的及意义1
1.2机械加工工艺规程的概述1
1.3机械加工艺规程的作用1
1.4工艺规程制订的原则2
1.5制订工艺规程的步骤2
2分析零件的作用、材料以及加工要求4
2.1分析零件的作用4
2.2分析零件的材料4
2.3分析零件的组成表面5
2.4分析零件的加工表面5
2.5分析零件的形位公差5
3设计零件的加工工艺规程6
3.1选择零件的生产类型6
3.2选择零件的制造形式6
3.3选择零件的加工基准7
3.4设计零件的工艺路线8
3.5选择零件的加工工艺装备9
3.6确定零件的机加工余量10
3.7确定零件的切削用量、计算加工工时11
4设计铣开档23平面的专用夹具19
4.1设计定位方案，确定定位元件19
4.1.1设计定位方案19
4.1.2确定定位元件19
4.2设计夹紧方案，确定夹紧元件20
4.2.1设计夹紧方案20
4.2.2确定夹紧元件20
4.3设计夹具体20
4.4选择对刀装置—对刀块21
4.5计算铣削力21
4.6计算夹紧力21
4.7分析定位误差21
结论23
致谢24
参考文献25
夹具装配图A0
倒档拨叉毛坯图A3
对刀块底座A3
夹紧盘A4
夹具体A1
心轴A3
过程卡
夹具做铣开档23平面
设计所包含文件
字数统计
倒挡拨叉样图
工序卡
夹具设计部分
说明书前三页
