超环面行星蜗杆传动核心件加工误差与虚拟测量研究

发布时间：2018-03-24 11:11

本文选题：超环面行星蜗杆传动　切入点：核心件　出处：《湘潭大学》2014年硕士论文

【摘要】：超环面行星蜗杆传动机构综合了滚动接触技术与行星蜗杆传动技术，具有结构紧凑、传动比大、传动效率高、承载能力强等诸多优点，在航空航天、国防装备、风力发电等尖端技术领域得到广泛应用，具有重要的战略意义。作为其核心件，超环面定子和中心蜗杆均具有复杂空间廓面，其加工精度无疑直接决定着该机构传动精度、可靠性与使用寿命。由于超环面行星蜗杆传动核心件廓面属于典型难加工曲面，在实际加工过程中很少系统的分析编程误差、机床误差、刀具磨损误差等各项原始误差对核心件工作廓面的影响规律。因此，如何有效提升超环面行星蜗杆传动核心件的制造精度一直是加工的重要技术瓶颈之一。为了实现核心件加工误差科学预测与有效控制，本文以超环面行星蜗杆传动核心件加工误差和虚拟测量为对象展开深入研究，具体研究内容如下： 1）综述超环面行星蜗杆传动加工误差分析、多体系统理论在切削加工误差分析理论的应用国内外研究现状，运用空间共轭曲面啮合理论推导了超环面定子、中心蜗杆理论廓面方程，利用UG/Open Grip语言二次开发建立超环面行星蜗杆传动核心件的三维模型，为后续研究奠定理论基础。 2）分析多轴数控机床加工误差来源并针对DMU80T五轴立式数控机床各轴运动关系，推导机床运动拓扑结构图与低序体阵列表，利用多体系统误差理论建立机床的空间几何误差模型；分别采用单侧面法、范成法推导超环面定子与中心蜗杆含机床误差的廓面方程；推导核心件廓面法向误差计算公式。 3）基于2）推导的含原始误差的核心件廓面方程，利用Matlab软件编制超环面定子、中心蜗杆的工作廓面多轴数控加工误差分析程序，探究各项原始误差以及综合误差对核心件廓面法向误差的影响规律，对比分析单侧面法、范成法两种不同方法的仿真加工误差结果。 4）利用虚拟测量原理，通过VC++语言编程基于UG软件开发超环面行星蜗杆传动核心件的计算机辅助制造与计算机辅助测量集成系统CAM/CAT，采用三点偏置法提取超环面定子、中心蜗杆加工刀位文件，在集成系统中实现仿真加工与虚拟测量，对比分析测量值与理论值吻合度，验证所开发系统有效可靠。综上，本文的研究为实现核心件加工误差科学预测与有效控制，，有效提升超环面行星蜗杆传动精度奠定了理论基础。
[Abstract]:The supertoroidal planetary worm drive mechanism combines the rolling contact technology with the planetary worm transmission technology. It has many advantages, such as compact structure, high transmission ratio, high transmission efficiency, strong bearing capacity, etc., in aerospace, national defense equipment, etc. Wind power generation and other cutting-edge technology fields have been widely used and have important strategic significance. As the core parts of wind power generation, both the stator and the center worm have complex spatial profiles, and their machining accuracy undoubtedly directly determines the transmission accuracy of the mechanism. Reliability and service life. Because the profile of the core part of the supertoroidal planetary worm drive is a typical surface difficult to be machined, there are few systematic programming errors and machine tool errors in the actual machining process. The influence of various original errors such as tool wear error on the working profile of core parts. How to effectively improve the manufacturing accuracy of the epicyclic worm drive core is always one of the important technical bottlenecks in machining. In order to realize the scientific prediction and effective control of the machining error of the core parts, In this paper, the machining error and virtual measurement of the core parts of the supertoroidal planetary worm drive are deeply studied. The specific research contents are as follows:. The main contents are as follows: 1) the machining error analysis of supertoroidal planetary worm transmission is summarized. The application of multi-body system theory in machining error analysis theory is reviewed. The hypertoroidal stator is derived by using the space conjugate surface meshing theory. Based on the theoretical profile equation of the center worm, the three-dimensional model of the epicyclic worm drive core is established by using the UG/Open Grip language, which lays a theoretical foundation for the further study. 2) analyzing the error source of multi-axis NC machine tool, and according to the motion relation of DMU80T five-axis vertical NC machine tool, deducing the movement topological structure diagram of machine tool and the list of low order body array, and establishing the spatial geometric error model of machine tool by using the theory of multi-body system error; Using the single side method and the model method, the profile equation of the error of the supertoroidal stator and the center worm containing machine tool is derived, and the calculation formula of the normal error of the core profile is derived. 3) based on the derivation of the core profile equation with original error, the multiaxial NC machining error analysis program for the working profile of the supertoroidal stator and central worm is developed by using Matlab software. This paper probes into the influence of various original errors and synthetic errors on the normal errors of core profiles, and compares and analyzes the results of simulation processing errors of two different methods, one side method and one side method. 4) using virtual measurement principle and programming based on UG software to develop CAM / CAT, an integrated system of computer aided manufacturing and computer aided measurement of epicyclic worm drive core parts, using three point bias method to extract the stator of the super torus. The tool position file of central worm machining is realized in the integrated system by simulation machining and virtual measurement. The coincidence between the measured value and the theoretical value is compared and analyzed to verify the validity and reliability of the developed system. In summary, the research in this paper lays a theoretical foundation for scientific prediction and effective control of machining errors of core parts, and for effectively improving the accuracy of planetary worm drive with super toroidal surface.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH132.44;TH161

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