夹具装配图
摘要
拨叉的加工质量将直接影响机器的性能和使用寿命。本次设计旨在提高CA6140车床拨叉的加工效率,由此我们首先对拨叉的结构特征和工艺进行了仔细的分析,然后确定了一套合理的加工方案,加工方案要求简单,操作方便,并能保证零件的加工质量。在制定加工工艺规程的顺序如下:
1分析零件;
2选择毛坯;
3设计工艺规程:包括制定工艺路线,选择基准面等;
4工序设计:包括选择机床,确定加工余量,工序尺寸及毛坯尺寸,确定切削用量及计算基本工时等;
5编制工艺文件。
此外,为了提高劳动生产率,降低劳动强度,保证加工质量,需设计专用夹具,本次设计选择了第2道工序铣Φ50、Φ20孔下端面的专用夹具设计,以满足加工过程的需要。
关键词:拨叉;工艺规程;夹具设计
Abstract
The processing quality of fork will directly affect the performance and service life of the machine. The purpose of this design is to improve the processing efficiency of the fork of CA6140 lathe. First, we have carefully analyzed the structural characteristics and technology of the fork, and then determined a reasonable processing scheme. The processing scheme is simple, easy to operate, and can ensure the processing quality of the parts. The order of formulating the processing procedure is as follows:
1. Analyzing parts;
2. Choose blank;
3. Design process regulations: including formulating process route and selecting datum level, etc.
4 process design: including selecting machine tools, determining processing allowance, process size and blank size, determining cutting parameters and calculating basic man-hour, etc.
5. Preparing process documents.
In addition, in order to improve labor productivity, reduce labor intensity and ensure processing quality, special fixture is needed to design. This design chooses the special fixture design for milling the lower end face of hole 50 and 20 in the second process to meet the needs of processing.
Key words: dialing fork; process specification; fixture design
目录
摘要1
Abstract 2
前言4
1.零件分析5
1.1零件的作用5
1.2零件的工艺分析5
2.工艺规程设计5
2.1毛坯的制造形式5
2.2基准面的选择6
2.3制定工艺路线6
2.4机械加工余量、工序尺寸及毛坯尺寸的确定7
2.5确定切削用量及基本工时8
2.5.1工序二:粗、精铣孔Ф20mm、Ф50mm的下表面8
2.5.2工序三:粗、精铣孔Ф20mm、Ф50mm的上表面10
2.5.3工序四:钻、扩、铰、精铰Ф20mm的孔10
2.5.4工序五:粗、精镗Ф50 mm的孔16
2.5.5工序六:铣断18
2.5.6工序七:钻锥孔Ф8mm的一半Ф4mm 19
2.5.7工序八:钻Ф5mm的孔,攻螺纹M6 21
2.5.8工序九:铣缺口22
3.绘制零件图和编制工艺文件24
3.1绘制零件图24
3.2编制工艺文件24
4、夹具设计26
4.1问题的提出26
4.2夹具设计26
4.3切削力及夹紧力计算26
4.4定位误差分析28
4.5定向键与对刀装置设计28
4.6夹具设计及操作简要说明30
总结31
参考文献33
夹具体
零件图
夹具设计部分
设计所包含文件
字数统计
毛坯图
工序2
工序5
工序6
工序7
工序8
工序9
工序3
工序4
加工过程卡