汽车变速箱齿轮零件图A4
摘要
夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。
此次设计是对汽车变速箱齿轮加工工艺及夹具设计，其零件为锻件，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。绘制零件图及毛坯图，填写加工工艺卡及工序卡。
本次设计滚齿加工齿轮齿形专用夹具，在减少停机时间的同时，还提高生产效率。设计内容包括定位方案以及夹紧方案的确定，定位元件和夹紧元件的选择，设计与机床连接零件—夹具体等。本次设计的夹具结构简易、紧凑，操作起来也比较方便灵活。更重要的是它在提高生产效率方面所起的作用尤为突出，体现了这次设计的主旨。
关键词：汽车变速箱、齿轮、加工工艺、滚齿、专用夹具
Abstract
The clamp is a clamping device for the machining of parts and is an indispensable device for machining parts. The fixture has high utilization rate, good economy, and low use and quantity of functional components. As the size of the part changes, more and more fixtures are eliminated, so it is necessary to design a special fixture. When designing a special fixture, the positioning scheme of theworkpiece, the clamping scheme of theworkpiece and the design of the clamping mechanism, other components of the fixture, and the structural form of the fixture should be considered.
This design is for the gear processing technology and fixture design of the automobile gearbox. The parts are forgings. The structure and process of the parts are analyzedwhile the parts drawing is understood. The selection of the rough reference and the fine reference is determined, and the machining allowance of the parts is determined. The amount and the size of the blank, to determine the machining process of the part, calculate the cutting amount andworking hours of each process. Draw the part drawing and blank drawing, fill in the processing card and process card.
This design of the hobbing machine gear tooth profile special fixture,while reducing downtime, but also improve production efficiency. The design includes the positioning scheme and the determination of the clamping scheme, the selection of the positioning and clamping components, the design and the machine connection parts- the clamp specific. The fixture structure of this design is simple and compact, and the operation is also convenient and flexible. More importantly, its role in improving production efficiency is particularly prominent, reflecting the main purpose of this design.
Keywords: automobile gearbox, gear, machining process, hobbing, special fixture
目录
摘要I
Abstract II
第一章绪论1
1.1本课题研究的意义1
1.2生产过程与工艺过程的概述1
1.3机械加工工艺过程的组成2
1.4提高机械加工生产率的途径3
1.5机床夹具的概述4
第二章零件的分析6
2.1零件作用的分析6
2.2零件材料的分析7
2.3零件组成表面的分析8
2.4零件加工要求的分析8
2.5零件形位公差的分析8
第三章零件加工工艺规程的设计9
3.1确定零件的生产类型9
3.2确定零件的制造形式9
3.3确定零件的加工基准11
3.4选择和确定加工工艺路线11
3.4.1表面加工方案的选择11
3.4.2选择加工工艺路线12
3.4.3确定加工工艺路线13
3.5确定机床加工的工艺装备14
3.6确定零件的加工余量14
3.7选择切削用量及计算加工工时15
第四章专用夹具的设计26
4.1设计定位方案26
4.2确定定位元件26
4.3设计夹紧方案27
4.4选择夹紧元件28
4.5设计夹具体28
4.6计算切削力29
4.7计算夹紧力29
4.8分析定位误差30
结论31
致谢32
参考文献33
夹具装配图A0
定位套A3
夹具体A1
汽车变速箱齿轮毛坯图A4
芯轴A4
压板A4
过程卡
夹具设计部分
目录
设计所包含文件
摘要
字数
工序卡
