摘要深腔薄壁件广泛应用于各个领域,其整体刚度低,加工时易产生应变导致失效,有不小的加工困难。论文对深腔薄壁件的外形结构、加工方法及安装方式等进行了讨论,并分析了工件和刀具的受力形变。63226
首先根据该工件的特殊性选择具体的加工方法,切削路径,计算刀具干涉的问题,获取工件倾斜装夹的具体角度范围。初选切削参数,并根据铣削力经验公式,计算出径向和轴向的铣削力。结合ansys软件,运用有限元理论分析铣削力作用下,刀具的变形。其次,设计工件专用的夹具并计算夹紧力,分析夹紧力作用下工件的形变量。最后,用Proe软件对加工过程进行仿真,确定了合适的工艺参数及加工程序。
毕业论文关键词: 深腔薄壁件 刀具干涉 切削参数 有限元分析 夹具设计
毕业设计说明书(论文)外文摘要
Title Deep cavity thin-wall parts NC machining simulation Special fixture design
Abstract The parts with deep cavity and thin wall are widly used various fields. The part has Low stiffness and is easy to be out of shape in machine work. It is hard to process. The paper studies the structure ,the way for machining and the method for installing of the deep cavity and thin wall parts. The paper also analyse the force and the deformation of the parts.
First ,a right way for cutting is choosed for the characteristic of the parts. And then calculate the angle of inclination by analyse the interfere of the tool. Next define the cutting parameters after referring the manual and calculate the radial and axial force. The finite element analysis software is used to analyse the deformation of the tool. Then the fixture is designed for the part.
The last, the part simulate the process of the numerical control machining.
Keywords deep-recessed thin-walled parts the interfere of the tool the cutting parameters finite element analysis the fixture desig
1 绪论 1
1.1 选题的背景及意义 3
1.2.1 数控加工仿真 3
1.2.2 薄壁件的加工 4
1.3 论文主要研究目标、内容和方法 5
2 加工方法及刀具选择 6
2.1 造型(proe作图) 6
2.2 加工方法 7
2.3 切削路径 8
2.4 刀具选择 9
3 刀具工件相对运动分析 10
3.1 工艺路线 10
3.2 刀具干涉分析 10
4. 刀具及工件的应力分析及变形研究 14
4.1 切削参数 14
4.2 切削力 17
4.3 有限元分析(ansys) 17
4.3.1 有限单元法的基本思想 17
4.3.2 有限单元法的分析步骤 18
4.4 刀具变形研究 20
4.4.1 刀具模型建立 20
4.4.2 刀具有限元分析