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基于CAPP的XZ25.50箱体零件及专用夹具设计

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基于CAPP的XZ25.50箱体零件及专用夹具设计

内容简介:

 摘要
这次我毕业设计的课题就是基于CAPP的箱体加工工艺及专用夹具设计。先针对箱体零件的特点设计工艺规程,再设计专用夹具,最后对箱体零件进行分类编码。
CAPP是通过向计算机输入被加工零件的原始数据,加工条件和加工要求,由计算机自动地进行编码,编程直至最后输出经过优化的工艺规程卡片的过程。计算机辅助工艺规划常是联结计算机辅助设计(CAD)和计算机辅助制造(CAM)的桥梁。
在制造业信息化环境中,工艺设计是生产技术准备工作的第一步,工艺规程是进行工装设计制造和决定零件加工方法与加工路线的主要依据,它对组织生产、保证产品质量、提高劳动生产率、降低成本、缩短生产周期及改善劳动条件等都有直接的影响,是生产中的关键工作。工艺知识是制造企业中重要的知识资源之一,是使产品设计变为成品的整个制造过程中的基础资源,它对保证产品质量以及提高企业经济技术效益具有十分重要的作用。
夹具的快速设计与制造,己经成为产品快速变换和制造系统新建成或重构后运行的瓶颈,严重地影响制造系统的设计建造周期、系统生产率、质量和成本。专用夹具的使用,一方面缩短了工序时间,降低了加工成本;另一方面,夹具本身的设计制造工时、材料消耗等又增加了工件的成本。因此,在何种生产条件下使用哪种类型的夹具才是经济合理的,也就是夹具的经济性,一直都是夹具结构发展和设计的一个主要问题。
关键词:CAPP;工艺设计;专用夹具
Abstract
This my Graduation Design is based on the CAPP XZ25.50 box of technological procedure and Special fixture design. First direcated against the peculiarity of the parts case design technological procedure,and design the special fixture, finally classification coding parts box.
CAPP, through the importation of computer parts were processing the raw data, processing conditions and processing requirements, carried out automatically by computer coding, programming optimized output until the end of the process of order card process. Computer-aided process planning is often linked computer-aided design (CAD) and computer-aided manufacturing (CAM) as a bridge.
The manufacturing industry becoming an information based society environment, the process planning produces is the first step in the technology preparatory work, the process planning is carries on the work clothes design to make and to decide the components processing method with processes the route the main basis, it produces, guarantee product quality, the enhancement labor productivity to the organization, reduces the cost, reduces the production cycle and the improvement work condition and so on all has the direct influence, is in the production key work. The craft knowledge is makes in the enterprise one of important knowledge resources, is causes the product design to become the end product in the entire manufacture process foundation resources, it to guaranteed the product quality as well as enhances the enterprise economical technology benefit to have the extremely vital role.
The fast design and the manufacture, oneself after becomes the product fast transformation and the manufacture system completes the bottleneck newly which or the heavy construction moves, seriously affects manufacture system the design construction cycle, the system productivity, the quality and the cost. Unit clamp use, on the one hand reduced the working procedure time, reduced the processing cost; On the other hand, the jig itself design manufacture man-hour, the material consumption and so on increased the work piece cost. Therefore, which kind of type uses under what kind of working condition the jig is the economy reasonable, also is the jig efficiency, continuously all is the jig structure development and a design main question.
Keywords   CAPP  Process Design  Special Fixtur
目 录
1绪论
2 零件加工工艺规程
2.1概述
2.2零件的作用
2.3 零件的工艺分析
2.4确定工艺方案的原则及注意问题
2.4.1粗、精加工分开原则
2.4.2工序集中与分散的原则
2.4.3制定工艺方案应注意的其它问题
2.5工艺规程的设计
2.5.1确定毛坯材料及尺寸
2.5.2定位基准的选择
2.5.3制定工艺路线
2.6工序尺寸的基本要求
2.7 确定切削用量和基本工时
2.8 切削用量的选择依据
2.8.1铣削
2.8.2钻孔
2.8.3扩孔和铰孔
2.8.机床精度及机床参数
2.9 各种加工工艺和加工方法
2.9.1平面加工工艺
2.9.3螺纹加工工艺
2.10常用工艺主要工序能达到的精度和表面粗糙度
2.10.1平面加工
2.10.2螺纹孔加工
3 专用夹具的设计
3.1 对铣床夹具体的要求
3.2 夹具体的毛坯结构
3.3夹具元件的选择与设计
3.4 专用夹具的设计步骤
3.5 绘制夹具总装配图
3.6 标注夹具总装配图上个部分尺寸和技术要求。
3.7 夹具公差配合的制订
3.7.1 制订夹具公差与技术条件的依据
3.7.2 制定夹具公差和技术条件的基本原则
3.8夹具公差的制订
3.9 夹具技术条件的制订
3.10夹具设计部分的计算
3.10.1基准的选择
3.10.2切削夹紧力的计算
3.10.3定位误差的分析
4 零件编码系统
4.1零件编码系统的概念
4.2零件分类编码系统的要求
4.3零件分类编码系统的设计和选择
4.4零件的分类成组技术
4.4.1编码分类法
4.4.2生产流程分析法
总结
致谢
参考文献
附录

 

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