【作者】 王来华；

【导师】 唐伟；

【作者基本信息】 山东大学 ， 机械电子工程， 2007， 硕士

【摘要】 在当今的切削加工中，球头铣刀发挥着越来越重要的作用，螺旋槽作为球头铣刀的一部分，对其加工性能有着极其重要的影响。在长期的应用中，国外在球头铣刀及其螺旋槽的理论研究和加工制造方面积累了丰富的经验；吸收国外先进技术为我所用，对于提高我国工具制造业水平，缩小与国外先进技术的差距，有重要作用。逆向工程是近年来发展起来的新技术，目前国内外还没有将它应用于铣刀的建模和制造的报道。本文试图在此方面进行研究，开拓出一条利用逆向工程技术研究铣刀的建模和制造的新方法。本文主要研究内容包括：首先，对铣刀螺旋槽基本理论进行了研究。介绍了螺旋槽成形原理，推导了铣刀周刃刃线数学模型、螺旋槽数学模型以及砂轮设计公式。在对基本理论进行研究的基础上，采用逆向工程技术，对球头铣刀进行了实体造型。结合球头铣刀的结构特点，详细介绍了造型步骤和方法，获得了球头铣刀的三维实体模型；提取了铣刀螺旋槽的主要几何参数。然后，对另一把球头铣刀进行了逆向造型，验证了上述方法的通用性。在分析、比较了现有螺旋槽加工方法的基础上，确定了铣刀螺旋槽成型磨削的加工方案；在分析了成型砂轮常用设计方法的基础上，提出了用于成型砂轮轮廓设计的CAD法，该法具有简单、直观的特点；论文详细介绍了设计方法和步骤，得到了成型砂轮的轮廓曲线，并生成了砂轮实体模型。在虚拟加工部分中，以球头铣刀圆柱部分螺旋槽的加工为研究对象，应用数控加工仿真软件Vericut构造了专用数控磨床。论文详细介绍了磨床的构造、刀具定义、导入的方法和步骤，编写了用于螺旋槽加工的数控代码，然后，将仿真加工得到的螺旋槽截形与实体造型的相应截形进行了比较，两者基本一致，证明了所采用的方法的可行性；最后，还讨论了造成误差的主要原因。总之，本文为球头铣刀的研究，提出了一套新的、基于逆向工程和仿真加工的技术方案。更多还原

【Abstract】 At present, ball-end miller is becoming more and more important in metal-cutting. As an important part of ball-end miller, helical flute is significant effect on the performance of ball-end miller. In the long-term application, the foreign technicians have accumulated abundant experience in the theory and manufacturing of the ball-end miller. Learning and absorbing the foreign advanced technology has played an important part in improving our machining technology and catching up the advanced level in the world.The reverse-engineering is a new kind of technology developed recently. Until now, there are still not the reports on studying or manufacturing ball-end miller by reverse-engineering. This thesis tries to find a new way on studying the modeling and manufacturing of ball-end miller via reverse-engineering.Firstly, we study the elementary theories of the helical flute. Its forming principle is introduced. The peripheral edge curve mathematical model helical flute mathematical model and formula for grinder design are deduced.Following above studying, the solid modeling of the ball-end miller is obtained with reverse-engineering technology. With reference to structure feature of the ball-end miller, the methods and procedure of modeling a ball-end miller are illustrated in detail. The important geometric parameters of the helical flute on miller are measured from its solid modeling. Then, another ball-end miller is modeled with above methods and this confirm versatile of the methods.On the foundation of analyzing and comparing of the existing processing methods on the helical flute, we determine the formed grinding plan of processing the helical flute on the ball-end miller. After studying usual methods of designing the formed grinding wheel, a new kind of the CAD method is proposed for designing it. This method has the characteristics of the simply and intuition. The thesis introduce in detail its method and steps. The profile curve of the formed grinding wheel is obtained and its solid modeling is produced.In the simulation processing, the cylindrical section of the helical flute on the ball-end miller is taken as the object of study. With the simulation processing software, Vericut, the special-purpose NC grinder is constructed. Its structure and the methods on defining the cutting tool are introduced in detail. The NC codes is compiled for grinding the helical flute. Then, the sectional shape of the helical flute that obtained by virtual processing is compared with the one of its solid modeling. Both are almost consistent, which prove that above method is feasible. Finally, we discuss primary causes that created error between both.In all, this thesis proposed a new way for designing and studying of ball-end miller based on reverse-engineering technology.更多还原