安全检测:瑞星:安全 诺顿:安全 卡巴:安全
毕业设计-飞机收放系统筒体类零件实体加工与仿真,共51页,11944字,附外文翻译、答辩PPT
摘 要
数控编程是数控加工准备阶段的主要内容之一,通常包括分析零件图样,确定加工工艺过程;计算走刀轨迹,得出刀位数据;编写数控加工;制作控制介质;校对程序及首件试切。有手工编程和自动编程两种方法。总之,它是从零件图纸到获得数控加工程序的全过程。是一种可编程的柔性加工方法,它的普及大大提高了加工效率。但是在加工技术方面,除要求数控机床具有较强的运动控制能力之外,更重要的是如何有效地获得高效优质的数控加工程序,并从加工过程整体上提高生产效率。由于零件复杂性的增加,而且工人技术水平有限,手工编程越来越困难。
应用数控编程可大大提高生产率、稳定加工质量、缩短加工周期、增加生产柔性、实现对各种复杂精密零件的自动化加工,易于在工厂或车间实行计算机管理,使车间设备总数减少、节省人力、改善劳动条件,有利于加快产品的开发和更新换代,提高企业对市场的适应能力并提高企业综合经济效益。
本文CATIAV5R20以及VERICUT为工具,完成了调整架的三维造型及仿真加工。内容包括:首先,根据调整架的结构特点和技术要求,在对其进行加工工艺分析之后,确定了零件的加工方法。然后,利用CATIA/CAD模块完成了零件几何体的参数化建模。在此基础上,利用CATIA/CAM模块进行数控编程,设计了加工路线、刀具轨迹,切削方式等工艺参数,生成了零件的NC程序。通过刀轨检查及时地发现刀具跟零件之间的过切和欠切。并通过虚拟加工过程仿真提前发现机床各运动部件、夹具及刀具之间的干涉和碰撞,确定干涉碰撞发生的位置和相应的NC程序段,并对先前的设计和NC程序进行修改。
关键词:数控编程,CATIAV5R20,三维造型,仿真加工
ABSTRACT
CNC machining is a programmable flexible processing methods, its popularity greatly improve the processing efficiency. But in the processing technology, in addition to requirements of CNC machine tools has a strong ability to control movement and, more importantly, how to efficiently obtain high-quality CNC machining process, and from the process as a whole to improve production efficiency. As part of the increased complexity and limited skills of workers, manual programming more difficult.
CNC machining applications can greatly improve productivity, stability, processing quality, shorten the processing cycle, increasing the production of flexible, to achieve a variety of complex precision components for the automation of processing, and improving the ability of the market to adapt and improve their overall economic efficiency.
In this paper, CATIAV5R20 as a tool,complete the adjust frame three-dimensional modeling and simulation process. Include: First, based on the adjusted frame structural features and technical requirements, in its process analysis, to determine the part of the processing methods. By checking in a timely manner toolpath tool found between the parts with undercuts and under cut. And through the virtual machining process simulation tools found in advance of the moving parts, jig and tool interference and collision between the determined interference collision occurred and the corresponding position of the NC block, and previous design and NC program to be modified.
KEYWORDS: CNC technology,CATIA,three-dimensional modeling,simulation, processing
目 录
摘 要 I
ABSTRACT II
第一章 绪论 1
1.1 CAD计算机辅助设计 1
1.2 数控编程技术概况 1
1.2.1 数控编程的概念 1
1.2.2 数控编程的意义 2
1.2.3 数控编程软件 2
1.3 CAM计算机辅助制造 2
第二章 零件加工工艺的编制 4
2.1零件分析 4
2.2零件加工的各参数分析确定 4
2.3加工工艺分析 5
2.4零件加工工艺流程 5
第三章 零件的分析和实体造型 9
3.1建模软件介绍 9
3.2 分析零件 10
3.3 零件的实体三维造型 11
3.4小结 14
第四章 实体加工仿真 15
4.1零件与毛培的装配 15
4.2零件加工 16
4.2.1粗车左端外轮廓 16
4.2.2精车右端外轮廓 20
4.2.3镗内孔 24
4.2.4右端轴钻孔 28
第五章 VERICUT的验证仿真 32
5.1 VERICUT简介 32
5.2准备工作 32
5.2.1车削NC代码的生成 32
5.2.2铣削NC代码的生成 33
5.3加工验证过程 35
5.3.1车削NC文件的导入及其前置 35
5.3.2 VERIVUT的树设定 35
5.3.3 VERIVUT程序的验证 38
第六章 总 结 40
参 考 文 献 41
毕业设计小结 42
致 谢 43