【作者】 许小龙；

【导师】 马术文；

【作者基本信息】 西南交通大学 ， 机械工程， 2013， 硕士

【摘要】 低速、重载行星齿轮减速器广泛应用于矿山、煤矿、船舶等处的机械设备中作为减速、增速或变速装置。其设计计算频繁,工作量大。为了提高设计效率,适应市场竞争需求,采用新的设计方法对行星减速器进行设计。同时为了提高低速、重载行星减速器齿轮的承载能力和稳定性,需要对齿轮齿面进行修形,并重构修形齿轮。本文将模块化设计思想应用到行星减速器设计中,设计了一套基于知识库的行星减速器设计自动化与模块参数化设计系统。同时本文在获得修形结果的基础了,利用NURBS曲面对修形齿轮齿面进行重构,在CATIA环境下获得了修形齿轮实体模型。论文主要研究工作如下：(1)将行星减速器的设计知识程序化,利用CATIA二次开发CAA,建立了基于知识库的减速器自动化设计系统。(2)将模块化设计思想应用在减速器设计中,对行星减速器进行模块划分；根据模块的划分,建立了行星减速器模块参数化设计系统,同时建立了减速器各个零部件之间的约束关系,采用自底向上的装配方法实现减速器的自动装配,并检查了干涉。(3)研究了NURBS曲线曲面插值算法,在获得修形结果的基础上,利用CATIA及其二次开发CAA反算修形齿面的控制顶点、权因子和节点矢量等参数。(4)根据得到的修形齿面参数,在CATIA中实现修形齿面的参数化重构,并通过调节控制点和权因子修改齿面形状,得到满足要求的修形齿面后,并在CATIA环境下得到修形后的齿轮三维模型。本文设计的行星减速器设计自动化系统提高了减速器的设计效率,且模块化参数化设计系统适应于其他类型减速器的零件建模,具有一定的通用性。修形齿面的NURBS曲面重构系统实现了修形齿轮在CAD中的表现,为验证修形结果提供了模型,具有一定的创新型。更多还原

【Abstract】 Planetary gear reducer of low speed and heavy loading was widely used in machinery equipment of mining, coal mining, shipbuilding and others places as the deceleration, speed change or speed-up transmission.But the design calculations were complicated and workload, in order to improve design efficiency and adapt to the needs of market competition, we need to adopt new design method of Planetary reducer design. At the same time, In order to improve the gear carrying capacity and stability of the low-speed, heavy-loading planetary gear reducer, we need to modify the gear surface and reconstruct the modified gear.This paper applied modular thought in the design of reducer, and developed a set of automation design system for planetar reducer based on knowledge base and a parametric design system for modules. At the same time this paper reconstructed modified gear surfaces Using NURBS surface based on the modified results, and got the modified gear model in the CATIA environment.Main contents of the paper are as follows:(1) Programing the design knowledge of planetary reducer, and developed a set of automation design system for planetar reducer based on knowledge base using CAA second development tools of CATIA.(2) Applied the modular design idea in reducer design, and classified the planetary gear reducer using modular design idea. Developed a parametric design system for modules which was classified before. Built the constraints between reducer models, assembled the reducer automatic using the bottom to up method, and Checked interference.(3) Researched of the interpolation algorithm of NURBS curves and surfaces, and calculated the control points, node vector, weight factor parameters on NURBS surface using CATIA and CAA second development tools of CATIA based on the modified results.(4) Parameterized reconstruct the modified gear surface in the CATIA environment using the NURBS parameters. Got the requirements surface by adjusting the control points and weights. Got the modified gear model in the CATIA environment.The automation design system for planetar reducer developed in this paper improved the design efficiency of planetar reducer, and the parametric design system for modules adapted to other types of reducers’design with a certain degree of versatility. Modified tooth surface reconstruction system displayed the modified gears in the CAD environment, and provided a model to verify the results of the modification, and with certain innovative.更多还原