摘要船用螺旋桨是一类典型的自由曲面零件，它的设计和制造精度直接决定了其推进效率。目前螺旋桨大都采用多轴数控机床进行加工。实际加工之前通常需要进行加工仿真。但是目前大多数多轴数控加工仿真的研究局限于几何仿真或刀具路径的规划，没有考虑切削参数、切削力及其它因素对切削加工的影响。而物理仿真可预测每小时能生产的、满足质量控制要求的工件数量，直接影响切削加工的经济性。 43854

本文针对数控加工几何仿真中的几项关键技术进行了研究，将STL格式的螺旋桨模型导入到加工仿真系统中，进行了刀具的参数化建模，并利用OpenGL动画效果实现了加工过程的轨迹仿真。本文建立了铣削过程的铣削力模型，并在物理仿真过程中采用了MATLAB与VC程序混合编程的方法。结果表明，该系统能够较好的实现螺旋桨铣削加工过程中的轨迹仿真，初步实现了几何仿真和物理仿真的结合。

毕业论文关键词：船用螺旋桨；物理仿真；数控加工仿真；铣削力仿真

Abstract

Marine propeller is a type of free form surface part. Its design and manufacture precision decide ship's thrust efficiency directly. At present, most of the machining of a propeller is often finished by a Multi-axis NC machining. Normally, a machining simulation is needed before the actual processing. But most research of Multi-axis NC machining simulation are limited to geometric simulation or tool path planning, without considering influence of cutting parameters, cutting force and other factors. Physical simulation can predict the number of work piece which meet quality control requirements produced per hour, will directly affect the economy of cutting process.

This text studies several key technologies in Geometry Simulation of NC Machining. STL file of marine propeller model is imported into the processing simulation system. Parametric modeling of cutting tool is performed. Moreover, track simulation in processing which rendered with OpenGL is realized in this text. Milling force model for milling process is built in this text. By the way, the interface technology between MATLAB and VC is adopted in the process of physical simulation. The results showed that this system has gotten good effect in track simulation in milling process of marine propeller. Furthermore, a simple implementation in the combination of geometric simulation and physical simulation is realized in this text.

Keywords: marine propeller; physical simulation; NC machining simulation; milling force simulation

目录

第一章  绪论 1

1.1 课题研究背景与意义 1

1.2 船用螺旋桨加工国内外研究现状 1

1.3 几何仿真国内外研究现状 2

1.4 铣削力仿真国内外研究现状 3

1.5 本章小结 3

第二章  系统总体设计 4

2.1 仿真系统的总体分析 4

2.2 仿真系统功能模块的设计 6

2.2.1 仿真系统组成模块介绍 6

2.2.2 仿真系统的组成模块设计 7

2.3 仿真系统软件界面的设计 8

2.4 本章小结 10

第三章  螺旋桨多轴铣削加工几何仿真 11

3.1 螺旋桨多轴铣削加工几何模型的建立 11

3.1.1 刀具体建模