基于GPS规范的轴承零件形状误差定义及评定

发布时间：2018-01-26 12:41

本文关键词： 新一代GPS规范轴承零件形状误差评价快速几何逼近算法　出处：《河南科技大学》2011年硕士论文　论文类型：学位论文

【摘要】：轴承零件的形状误差是影响轴承旋转精度的重要技术指标。第一代GPS标准对产品的几何定义存在诸多问题,已不能很好的满足制造业的需求,更为科学的新一代GPS的制定和实施势在必行。本文基于新一代GPS标准,以轴承回转体零件形状误差为主要研究对象,探究了形状误差的描述方法。结合空间直线度和圆柱度误差的几何特征,给出了直线度和圆柱度误差评定的快速几何逼近算法。论文分析了新一代GPS的基本定义和理论框架,基于新一代GPS标准给出了常见轴承回转体零件的规范方法。通过对比分析可知,以计量学为基础的新一代GPS标准实现了产品整个生产周期的统一规范,对整个生产过程的资源配置进行了统筹优化,提供了清晰的几何公差定义体系,从而助力了提高产品质量和降低生产成本。论文基于新一代GPS标准提出了空间直线度和圆柱度的误差评定的快速几何逼近算法,并分别探究了算法的求解过程。空间直线是除球体之外所有回转体零件的回转中心和测量、评定的参考要素,其空间位置的确定和误差评定算法是形状误差评定中必须解决的关键问题。圆柱因其加工方便、加工成本相对较低,且具有比较好的综合性能,在轴承滚子和套圈中得到了广泛的应用。因此,选定空间直线度和圆柱度作为研究对象。通过算法评定结果和三坐标测量机给出结果的对比,证明了该算法可以快速准确求解空间直线度和圆柱度误差值。为空间直线度和圆柱度误差的评价提供了一种新的实用算法,同时该算法原理可以在其它形状误差的评定中进行推广,为其他形状误差评定提供了新的思路。
[Abstract]:The shape error of bearing parts is an important technical index which affects the precision of bearing rotation. There are many problems in the geometric definition of products in the first generation GPS standard, which can not meet the needs of manufacturing industry. The formulation and implementation of a more scientific new generation of GPS is imperative. Based on the new generation of GPS standard, this paper takes the shape error of bearing rotary parts as the main research object. Based on the geometric characteristics of spatial straightness and cylindricity error, a fast geometric approximation algorithm for evaluating straightness and cylindricity error is presented. In this paper, the basic definition and theoretical framework of the new generation GPS are analyzed. Based on the new generation GPS standard, the standard methods of the common bearing rotary parts are given. The new generation of GPS standard based on metrology realizes the unified specification of the whole production cycle, optimizes the resource allocation of the whole production process, and provides a clear definition system of geometric tolerance. This helps to improve the quality of products and reduce production costs. Based on the new generation of GPS standard, this paper presents a fast geometric approximation algorithm for the error evaluation of spatial straightness and cylindricity. The spatial straight line is the reference element for the measurement and evaluation of all parts except the sphere. The determination of spatial position and the algorithm of error evaluation are the key problems in shape error evaluation. Because of its convenient processing, relatively low processing cost, and better comprehensive performance. It has been widely used in bearing roller and ring. Therefore, spatial straightness and cylindricity are selected as research objects. The results are compared with those of CMM. It is proved that the algorithm can quickly and accurately solve the spatial straightness and cylindrical error, and provide a new practical algorithm for the evaluation of spatial straightness and cylindricity error. At the same time, the principle of the algorithm can be extended to other shape error evaluation, which provides a new idea for other shape error evaluation.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3

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