毕业论文移动版

摘要船用螺旋桨是船舶推进系统的核心部件,加工出高质量的螺旋桨对于船舶的发展起到重要作用。而由于螺旋桨是复杂的自由曲面零件，其设计与制造难度较高。传统的螺旋桨加工方法比较落后，不仅费时费力，且精度难以保证。随着数控加工技术的发展，螺旋桨逐渐采用数控机床加工中心来制造，但是加工效率并不理想，其主要原因是不能在一次装夹下完成上下面的加工。

本课题就是围绕这一问题提出的,在大型卧式数控镗铣床的基础上，通过改进机床结构，添加转动轴，使动力头能够翻转，并采用双旋转的动力头，使机床满足复杂曲面的加工要求，从而能在一次装夹下完成加工，提高螺旋桨的加工效率。首先利用UG/CAM生成螺旋桨的加工刀轨，并生成G代码，用于仿真加工。然后进行机床结构设计。最后以VERICUT软件为平台构建了船用螺旋桨的整个加工工艺系统，包括加工机床、控制系统、刀具等，进行螺旋桨的仿真加工。通过构建虚拟的加工系统进行加工验证，这种结构具有一定的可行性。48790

毕业论文关键词：船用螺旋桨，机床结构，UG/CAM编程，仿真加工

Abstract

Marine propeller is the core component of ship propulsion system, so processing of high quality propeller plays an important role in the development of ship. And because the propeller is complex freeform surface, the difficulty of its design and manufacture is high. The traditional manufacture method of a propeller is relatively backward, it not only is time-consuming, but also the accuracy is hard to guarantee. With the development of numerical control technology, it gradually uses CNC machining centers to process propeller. But the processing efficiency is not satisfactory, the main reason is that the processing of the propeller blades’ two faces can not be accomplished in one fixture.

The topic is raised around the issue. By improving the machine tool structure on the basis of the large horizontal CNC boring Milling machine, and adding the axis of rotation, so that the dynamic head can rotate. At same time, with using the double dynamic head, it can make the machine meet the processing requirements of complex curved surface .Thus it can finish the processing of the propeller blades’ both faces in one fixture and improve the processing efficiency. The first thing is to use UG/CAM to generate propeller machining tool track of propeller, and generate G code for the simulation of processing. Then it need to design the machine tool structure. The last work is that constructs the whole machining process system based on the platform of VERICUT including the processing machine tool, control system and tool, to process the propeller by machining simulation. By constructing the virtual machining system for processing verification, the structure has certain feasibility.

Keywords: Marine Propeller, Machine tool structure, UG/CAM programming, Simulation processing

目录

第一章 绪论 1

1.1 课题研究背景 1

1.2 螺旋桨加工相关技术研究现状 1

1.2.1 五坐标机床的研究 1

1.2.2 螺旋桨加工研究现状 2

1.3 目前存在的问题 3

1.4 论文的主要研究内容和研究价值 4

1.5 本章小结 4

第二章 虚拟加工工艺系统总体方案设计 (责任编辑：qin)