基于M-MAP的制造误差建模与分析

发布时间：2017-12-28 13:21

本文关键词：基于M-MAP的制造误差建模与分析　出处：《山东大学》2017年硕士论文　论文类型：学位论文

【摘要】：零件的几何尺寸特征直接影响着产品的质量,是决定产品市场占有率和公司效益的重要因素。复杂零件的加工是由多道工序来完成的,与产品的装配工作相同,零件在加工的各工序间也存在着误差传递,所不同的是误差的传递元素和传递方式存在较大的区别。零件的质量受到加工系统中多个工序误差的影响,而各工序误差的状态又由多个误差源共同决定,因此如何准确地表达复杂多工序零件误差的传递过程,并对零件最终的状态进行表达是实现制造业高精度、高效率、高可靠性的重要因素。目前国内外学者在对复杂多工序零件误差传递过程的研究多集中在单一因素的考虑或特定的基础假设上,对多个误差源的共同影响关系以及误差传递过程的表达还缺少研究。本文以典型零件的多工序加工为例,对零件的误差传递过程进行建模,在状态空间模型的基础上构建了一种新的误差传递模型。以尺寸链和特征的公差要求为基础,对零件的工艺规划进行分析,并通过对零件的加工路径进行优化,得到误差的累积路线。在公差设计要求T-Map(Tolerance Map)模型的基础上,对零件加工过程中的每一步工序误差进行建模,得到零件加工误差的M-Map(Manufacturing Deviation Map)模型,用该模型来描述制造过程中误差的形成以及误差之间传递累积的关系。论文的研究内容主要包括:(1)综述了公差建模、公差分析的国内外研究现状,并对误差传递模型进行了详细研究,分析课题背景。(2)对零件的工艺规划进行分析,得到制造误差的累积路线,通过提取相关的加工数据,构建零件的约束关系模型。(3)通过定义零件、夹具和机床坐标系,利用多维矩阵对各个工序的偏差进行定义,在偏差流状态空间模型的基础上,用齐次坐标变换矩阵表达各个坐标系之间的关系,构建工序间的误差传递模型。(4)根据T-Map模型的相关理论以及M-MAP模型的概念,以齐次变换理论和状态空间模型为基础,构建零件目标特征的M-Map模型。(5)以一个零件的加工过程为例,构建其制造误差的M-MAP模型,验证本文提出的建模方法的可行性。
[Abstract]:The geometric size characteristics of the parts directly affect the quality of the product. It is an important factor to determine the market share of the product and the benefit of the company. The processing of complex parts is completed by many processes. The same as the assembly work of products, there is error transmission between parts in every process. The difference is the difference between the transfer elements and the way of transmission. The quality of the parts is affected by multiple process error processing system, and the process error state consists of a plurality of error sources jointly decided, so how to convey complicated process parts error accurately, and the final state of the parts expression is an important factor to realize high precision, high efficiency and high reliability of manufacturing industry the. At present, domestic and foreign scholars in the study of the error propagation process of complex multi process parts mostly focus on single factor considerations or specific assumptions. There is a lack of research on the common influence relationship of multiple error sources and the expression of error propagation process. In this paper, the process of error propagation of parts is modeled based on the multi process processing of typical parts, and a new error propagation model is constructed based on the state space model. Based on the tolerance requirements of dimension chain and feature, the process planning of parts is analyzed, and the path of error is accumulated through optimizing the machining path of parts. In the tolerance design requirements of T-Map (Tolerance Map) model based on the modeling of every step error of machining process, get the machining error of M-Map (Manufacturing Deviation Map) model, using the model to describe the relationship between the formation of errors in the manufacturing process and the cumulative error transfer. The main contents of the paper are as follows: (1) the research status of tolerance modeling and tolerance analysis at home and abroad is reviewed, and the error transfer model is studied in detail, and the background of the research is analyzed. (2) the process planning of the parts is analyzed, and the cumulative route of the manufacturing error is obtained. By extracting the related processing data, the constraint relation model of the parts is constructed. (3) through the definition of parts, fixture and machine coordinate system, defined by multidimensional matrix deviation on each step, based on the deviation of flow state space model, the relationship between the expression of the various coordinate systems with the homogeneous coordinate transformation matrix, construct the error between operations transfer model. (4) according to the related theory of T-Map model and the concept of M-MAP model, based on the homogeneous transformation theory and the state space model, the M-Map model of part target characteristics is constructed. (5) taking the machining process of a part as an example, the M-MAP model of its manufacturing error is constructed to verify the feasibility of the modeling method proposed in this paper.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH16

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