变速器二三档变速叉-零件图A3
摘要
夹具这个传统的行业，在制造业飞速发展的今天，又被赋予新使命。国内经济快速发展的今天，产业结构以及机械加工制造业，其结构性变化明显。企业完成工装、夹具的优化以及改良是迫在眉睫。因现在产品种类繁多，零件结构万万千千。专用夹具的设计在不可取代的基础上，变的越来越重要。
本次毕设内容是变速器二、三档变速叉零件的加工工艺及铣宽20槽铣床专用夹具设计。该零件的作用是机器或者机构上比较重要的，为机器或者机构实现不一样的速度提供操纵。具体操作是拨动同步器齿环，实现相应档位的分开或者结合等等。
零件加工工艺的分析不仅完成了工件结构分析、基准选择、制造和加工方式选择，还根据加工工序卡完成了相应是切削数据的计算。本次专用夹具设计是为铣宽20槽进行的。根据零件的特点需要对其完成了定位夹紧方案以及装置的设计，还对夹具上其他零部件进行了设计和确定，完成设计图纸量的要求等。
关键词：变速器；二、三档变速叉；铣宽20槽；铣床；夹具
Abstract
The traditional industry of fixtures has been given a new mission in today's rapid development of manufacturing. Today, the rapid development of the domestic economy, the industrial structure and the mechanical processing manufacturing industry, its structural changes are obvious. It is extremely urgent for enterprises to complete the optimization and improvement of tooling and fixtures. Because of thewidevariety of products, the structure of parts is thousands of thousand. The design of special fixtures is becoming more and more important on an irreplaceable basis.
The content of this design is the processing technology of the second and third gear shifting fork parts of the transmission and the special fixture design for the milling and 20-slot milling machine. The function of the part is important on the machine or the mechanism, providing manipulation for the machine or mechanism to achieve different speeds. The specific operation is to dial the synchronizer ring to realize the separation or combination of the corresponding gears and the like.
The analysis of the part processing technology not only completes theworkpiece structure analysis, benchmark selection, manufacturing and processing mode selection, but also completes the calculation of the cutting data according to the machining process card. This special fixture design is for milling 20 slots. According to the characteristics of the parts, it is necessary to complete the positioning and clamping scheme and the design of the device, and also design and determine other components on the fixture, and complete the requirements of the design drawings.
Keywords: transmission; second and third gear shift fork; millingwidth 20 slots; milling machine; fixture
目录
摘要I
Abstract II
第一章引言1
第二章零件结构及加工分析、确定生产类型及制造形式3
2.1零件结构及加工分析3
2.1.1零件作用的分析3
2.1.2零件材料的分析3
2.1.3零件组成表面的分析3
2.1.4零件加工表面的分析3
2.1.5零件形位公差的分析4
2.2确定零件的生产类型4
2.3确定零件的制造形式4
第三章零件加工工艺的设计与计算6
3.1基准的选择6
3.2选择、比较和确定加工工艺路线6
3.2.1选择加工工艺路线6
3.2.2比较和确定加工工艺路线7
3.3确定机床、夹具、刀具及量具8
3.4确定零件的机加工余量8
3.5确定切削用量、计算加工工时10
第四章铣宽20槽专用夹具的设计24
4.1定位方案和元件的确定与选择24
4.1.1定位方案的确定24
4.1.2定位元件的选择24
4.2夹紧方案和元件的确定与选择25
4.2.1夹紧方案的确定25
4.2.2夹紧元件的选择25
4.3设计夹具体26
4.4选择对刀装置-对刀块27
4.5计算铣削力及夹紧力27
4.6分析定位误差28
结论29
致谢30
参考文献31
变速器二三档变速叉-毛坯图A3
夹具装配图A0
对刀块支承板A4
工件定位销A4
夹紧盘A4
夹具体A1
心轴A3
过程卡
夹具设计部分
设计所包含文件
铣宽20槽夹具
字数统计
工序卡
说明书前三页
变速器二、三挡变速叉已选
