Metrology and measurement data evaluation for the geometrical product verification within a holistic tolerance management

整体公差管理中几何产品验证的计量和测量数据评估

• 批准号: 290270144
• 负责人: Professor Dr.-Ing. Tino Hausotte
• 金额: --
• 依托单位: Lehrstuhl für Fertigungsmesstechnik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/290270144?language=en
• 关键词: Metrology; measurement; data; evaluation; geometrical

The research group FOR 2271 is investigating from a fundamental research point of view, how a holistic approach and efficient tools for the management of geometric deviations during product development needs to be designed. The findings are verified using a model factory. The subproject 3 participates in the research group by the determination the form deviations and the associated measurement uncertainty as well as the usage of this information within a function-oriented tolerance specification. During the first funding phase, the subproject aimed at developing suitable approaches to provide the associated single point uncertainties (SPU) for given measurement data, using various tactile, optical and tomographic measurement methods. Based on these findings, methods for the description and correction of the systematic form deviations were developed. Furthermore, fusion and regression algorithms considering the SPU as weighting factors were designed. These contributions combined with the provision of the SPU of the deviation representation and the supply of the uncertainty of single features as well as the metrological set-up for validating the demonstrator complement the input of the subproject towards the research group.Based on the knowledge gained during the first funding phase, necessary data processing operations along the measurement chain will be optimized during the second funding phase with the aim of reducing the measurement uncertainty associated with every measurement during the determination of the form deviations of tolerated work pieces. Here, algorithms that are more complex will be used to generate an exploitable information yield, while the substantially increased resulting computational demand will be compensated by the consequent implementation of GPGPU-programing techniques. A reduction of the measurement uncertainty of the geometric characterisation usually enables the possibility of defining smaller tolerances. The planned project also includes metrological examinations of tooth flanks topography measurements of the influence of the expected wear and tear onto the tolerance specification. Additionally, approaches aimed at optimising the algorithms used for the weighted geometric registration of measurement data against nominal and reference data will be examined. Thus, the influence of the registration routine on the data processing and consequently the local measurement uncertainty of tolerated geometry elements will be characterised and reduced. Within a collective effort with the project collaborates, the transferability of the determination of the SPU of geometry elements onto edge regions will be examined in order to assess the influence of the hereby occurring measurement uncertainty on the associated tolerance specification. The cooperation will be complemented by the standardised geometrical characterisation of the mechanical components of the X-ray aperture test stand.

FOR 2271 研究小组正在从基础研究的角度研究如何设计一种整体方法和有效的工具来管理产品开发过程中的几何偏差。使用模型工厂验证了研究结果。子项目 3 通过确定形状偏差和相关的测量不确定性以及在面向功能的公差规范中使用此信息来参与研究小组。在第一个资助阶段，该子项目旨在开发合适的方法，使用各种触觉、光学和断层扫描测量方法，为给定的测量数据提供相关的单点不确定性（SPU）。基于这些发现，开发了描述和纠正系统形状偏差的方法。此外，还设计了以SPU为权重因子的融合和回归算法。这些贡献与偏差表示的 SPU 的提供、单个特征的不确定性的提供以及用于验证演示器的计量设置相结合，补充了子项目对研究组的输入。基于所获得的知识在第一资助阶段，测量链上必要的数据处理操作将在第二资助阶段进行优化，目的是在确定容许工件的形状偏差期间减少与每次测量相关的测量不确定性。在这里，更复杂的算法将用于生成可利用的信息产量，而由此产生的计算需求的大幅增加将通过随后的 GPGPU 编程技术的实现来补偿。几何特征测量不确定度的降低通常可以定义更小的公差。计划的项目还包括对齿面形貌进行计量检查，测量预期磨损对公差规格的影响。此外，还将研究旨在优化测量数据与标称数据和参考数据的加权几何配准算法的方法。因此，配准例程对数据处理的影响以及由此产生的容许几何元素的局部测量不确定性将被表征和减少。在与项目合作的集体努力中，将检查几何元素的 SPU 确定到边缘区域的可转移性，以评估由此出现的测量不确定性对相关公差规范的影响。 X射线孔径测试台机械部件的标准化几何特征将补充此次合作。