文档介绍：Yuncheng University
学士学位论文
大型螺旋桨双面加工铣床结构设计
学科门类: 机械类
学位申请人:
隶属系部: 机电工程系
指导教师:
申请日期: 2013年6月
大型螺旋桨双面加工铣床结构设计
设计总说明
螺旋桨是一类典型的自由曲面零件广泛应用于航天、航海等行业。它的曲面形状和制造精度直接决定了推进的效率和噪音的大小,研究其设计与加工对于军工和整个航运都有着极其重要的意义。
本论文主要针对螺旋桨的结构、加工特点,设计了一种能够同时加工两个自由曲面的双面加工铣床的结构部分,重点包括整体结构设计和主轴装夹结构设计。
该机床主要由机架部分、两套主轴装夹机构和螺旋桨装夹机构组成。螺旋桨安装后,机床能同时加工螺旋桨桨叶的上下两面,并且使两面产生的加工应力基本抵消,既提高了铣削的精度,又避免了换面安装时所带来的定位误差。另外,当一个桨叶加工完成后,可通过螺旋桨装夹机构的转动,来加工其他叶片,一次安装即可加工所有桨叶,加工精度和加工效率都可以提高。
铣床整体为立式混联机床;主轴装夹机构由2维平动工作台和3轴并联工作台组成,能实现5个自由度的移动;螺旋桨夹紧机构由1维平动工作台、旋转工作台和夹紧机构组成,可以方便螺旋桨的安装和转动。
该铣床的设计,对提高螺旋桨的加工精度和加工效率有着重要意义。
关键词:并联机床;螺旋桨加工;双面铣床
The Propeller Double-sided Processing Structure Design
Design Description
Propeller is a kind of typical free-form surface parts widely used in aerospace, navigation, etc. Its curved shape and manufacture of precision directly determines the efficiency of propulsion and the size of the noise, studies the design and processing for the military and the whole shipping has extremely important significance.
In this thesis, the physical construction of double-sided milling machine that can machining double-free-form surface at the same time is designed, in accordance with the structure and processing characteristics of large propeller, the design highlights include the whole structure design and spindle clamping mechanism design.
This machine posed of two sets of spindle clamping institutions and propeller clamping position. The double-free-form surface of propeller blade can be machined by the milling machine at the same time after the propeller is installation ,so the two machining stress can be counteract each other. In this way, not only improves the precision of milling, but also avoid the positioning error when changing face when installed .In addition, after the machining of a propeller blade is finished, the propeller can roll by the propeller clamping position, then all propeller blades of the propeller can be machined, so the quality and efficiency of the machining