基于UG剃齿刀构建及齿廓修形优化研究.doc

陕西理工学院毕业设计论文 第 PAGE 69页 共 NUMPAGES 69页 基于UG剃齿刀构建及齿廓修形优化研究 [摘要] 齿轮是重要的机械基础传动部件，其加工时需要复杂的刀具。用传统方法设 计齿轮刀具，计算量大，周期长，而复杂刀具智能CAD软件可以根据用户的需 求，快速设计出所需的刀具。必须检验设计出的刀具的齿形参数，防止加工齿 轮时发生根切等不良现象;如果把刀具制造出来，通过试切来检验，容易造成 浪费，加长生产周期。为此，本文利用计算机仿真技术，结合计算机图形学技 术，对齿轮刀具加工齿轮，形成齿廓的过程进行动态图形仿真，帮助刀具设计 者检验刀具齿形参数，减少甚至避免试切。本论文基于目前剃齿齿面修形的现状以及发展趋势做了以下研究工作: 1.以传统剃齿加工原理为基础，分析并总结了国内外剃齿工艺研究领域的主要成果，阐述了造成中凹误差的主要原因，以及目前解决中凹误差的主要措施。 2.在UG平台上，对剃齿刀及齿轮实现了三维参数化实体造型并对它们进行了啮合装配;提出了渐开线齿廓以样条曲线表示，并参数化了此样条曲线，以达到对渐开线齿廓的自由修改。 3.基于anys对剃齿刀/齿轮的无侧隙啮合加工过程进行了接触仿真分析，得出了沿齿廓曲线上的接触压力分布结果。 4.在ansys环境下，以尽量满足整个齿廓曲线等接触压力为目标，对剃齿刀/齿轮啮合的最大接触压力进行了基于实验设计的技术优化，从而修形了齿廓曲线。 [关键字]：剃齿刀 样条 参数化 接触分析 （Grade07,Class6, Mechanical Design Manufacturing and Automation , school of Mechanical engineering,Shaanxi University of Technology，Hanzhong 723003，Shanxin ） [Abstract] Gears are important driving components in mechanical engineering. The Machining cutters of gear are very complicated. It’s very difficult to design gear tools In traditional way，because it needs so many computations. The intelligent CAD Software for complex cutter can help the user design cutters easily and quickly. The Teeth Profile of the designed cutter must be checked to ensure no such situations as undercutting…etc. Happens when gears are machining with it.If we check the Profile Of gear tool hrough cutting after the tool is manufactured，it will waste a lot of Money and time. so the simulation methods are proposed. The aims of this thesis are to research on graphic simulation for gear一cutting Process and develop the corresponding software.With the software，the user can see The generation of gear teeth on the computer screen directly，and check whether theundercutting happens. The dissertation makes studies on tooth surface modification of shaving cutter based on present state and trend of deve