6 扇形曲柄
摘要
现代机械加工行业发生着深刻的结构性变化，工艺工装的设计与改良已成为相关企业生存和发展的必要条件。夹具行业作为一个传统而富有活力的行业，近十几年取得了突飞猛进的发展。在新经济时代，这一行业呈现了新的发展趋势。
本次设计对扇形曲柄零件的加工工艺分析及钻Ф5孔进行夹具设计研究。首先对零件进行分析，然后选择毛坯制造形式，制订工艺路线，确定机械加工余量、切削用量等。对于专用夹具的设计，首要的任务是想好设计方案，根据所设计的方案确定定位面，限制每个定位元件的自由度，使其达到设计要求。为保证工件在本工序中所有需要完成的待加工面充分暴露在外，夹具要做的尽可能敞开，因为夹紧机构元件和加工面之间应保持一定的安全距离，以防止夹具与钻套、刃具在加工过程中发生干涉。
通过本次设计提升了我独立分析与解决机械制造的实际课题的能力，并且在计算机CAD、资料检索等方面也得到了锻炼与提高。
关键词：扇形曲柄、加工工艺、夹具设计、切削用量、定位
Abstract
The modern mechanical processing industry has undergone profound structural changes. The design and improvement of technological tooling has become a necessary condition for the survival and development of related enterprises. Fixture industry, as a traditional and dynamic industry, has made rapid progress in recent decades. In the new economic era, this industry presents a new trend of development.
In this design, the processing technology analysis of fan crank parts and the clamp design of drilling hole 5 are studied. Firstly, the parts are analyzed, then the blank manufacturing form is selected, the process route isworked out, and the machining allowance and cutting parameters are determined. For the design of special fixture, the most important task is to think about the design plan, determine the positioning surface according to the design plan, limit the freedom of each positioning element, and make it meet the design requirements. In order to ensure that all the surface to be machined in this process is fully exposed, the fixture should be as open as possible, because there should be a certain safety distance between the clamping mechanism components and the processing surface to prevent interference between the fixture and the drill sleeve and the cutting tool in the process of processing.
Through this design, I have improved my ability to independently analyze and solve the actual problems of mechanical manufacturing, and have also been trained and improved in computer CAD, data retrieval and other aspects.
Keywords: sector crank, processing technology, fixture design, cutting parameters, positioning
目录
摘要I
Abstract II
第1章绪论1
1.1课题背景1
1.2目的1
1.3夹具设计中的特点1
1.4夹具设计需保证的条件1
1.5夹具的发展趋势2
第2章零件的分析3
2.1零件的作用3
2.2零件的工艺分析3
第3章工艺规程设计5
3.1确定毛坯的制造形式5
3.2基面的选择5
3.2.1粗基准的选择5
3.2.2精基准的选择6
3.3制订工艺路线6
3.4机械加工余量的确定7
3.5确定切削用量及基本工时9
第四章专用夹具设计22
4.1专用夹具的提出22
4.2定位机构22
4.3夹紧机构23
4.4定位误差设计25
4.4.1定位误差25
4.4.2产生定位误差的原因25
4.4.3定位误差计算26
4.5机床夹具的总体形式27
4.8夹具设计及操作简要说明28
结论29
参考文献30
致谢32
夹具装配图
夹具非标零件图-心轴
夹具非标零件图-钻模板
夹具体
零件毛坯图
扇形曲柄零件图
工序卡3
工序卡4
工序卡5
工序卡6
工序卡7
工序卡8
工序卡9
工序卡10
工序卡11
过程卡
夹具设计部分
设计目录
设计所包含文件
摘要部分
字数统计
钻5孔夹具
