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毕业设计-飞机执行系统液压壳体类零件实体加工与仿真，共45页，11148字，附外文翻译、答辩PPT
摘 要
壳体类零件是机器的基础件之一。主要功用是保持各轴、套以及齿轮在空间的位置关系，使其能够协调地运动，并起着连接、支撑各零件的作用，因而结构一般复杂。而飞机壳体类零件对于壳体不但起连接、支撑作用，而且需要满足各油路系统的功能实现。因而结构比普通壳体的结构复杂得多。飞机类壳体零件一般由许多不规则型腔和型面组成，并存在大量的油路孔，且孔距精度要求高，壳体的壁薄厚不均，由于设计要求高，从而加工难度大，导致制造周期过长，这也是制约飞机发动机燃油附件产品研制生产的瓶颈。数控编程是计算机仿真技术在机械制造业的重要应用领域之一。该技术对减少制造成本、缩短产品制造周期和提高产品质量意义重大。
进行数控编程，首先需要用UG(CAD)模块完成零件的三维建模，接着对壳体零件进行加工分析，在此基础上，利用UG（CAM）模块进行数控编程,设计加工路线、刀具轨迹、切削方式等工艺参数，生成零件的NC程序。通过刀轨检查及时地发现刀具跟零件之间的过切、欠切。并通过vericut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： UG建模，NC加工、vericut仿真

ABSTRACT
One of the shell parts is the foundation of machine parts. Main purpose is to keep the shaft, and gear in space position relations, enables it to coordinated movement, and play the role of a connection, support various parts, and complex structure in general. The plane shell parts connection, supporting role, not only for shell and need to satisfy the realization of the function of the oil system. So structure than ordinary shell structure is much more complicated. Plane shell parts generally consist of many irregular cavity and profile, and there are a lot of oil hole, and pitch accuracy requirement is high, the shell wall uneven, due to the design requirement is high, thus processing difficulty is big, cause manufacturing cycle is too long, it is also restricted aircraft engine fuel accessories products are the bottleneck of the development and production.
For CNC programming, first need to complete the parts with UG (CAD) module of 3 d modeling, then carries on the processing analysis for shell parts, on this basis, the use of UG/CAM module for NC programming, the processing route, the tool path design, process parameters, such as cutting way to generate NC program of the parts. Through checking the tool path found between tool and parts in a timely manner through cut, owe cut. By Vericut virtual machining process simulation found in advance all the moving parts, machine tool fixture and the interference between cutter and collision, determine the position of the interference in collision and the corresponding NC procedures section, and to modify the previous design and NC program.
KEYWORDS: UG modeling，NC machining，vericut simulation

目 录
摘 要 1
ABSTRACT 2
第一章 绪 论 1
1.1 UG简介 1
1.2 UG的特点 2
第二章 零件的三维建模 3
2.1 分析零件 3
2.2零件的建模 4
第三章 零件的仿真加工 8
3.1 CAM简介 8
3.2 仿真加工 9
3.2.1 零件单位转换及分析 9
3.2.2初始化工作环境 11
3.2.3创建刀具 11
3.2.4 创建几何体 12
3.2.5 创建操作 13
3.3 后处理生成程序 25
第四章 VERICUT的验证仿真 27
4.1 VERICUT的简介 27
4.2 加工验证过程 28
4.2.1 实验条件 28
4.2.2工件建模 28
4.2.3机床仿真 28
4.3本章小结 33
第五章 结 论 34
致谢 35
参考文献 36
毕业设计小结 37
附 录 38