An error sensitivity analysis and control method for complex product assembly quality

Abstract

The invention discloses an error sensitivity analysis and control method for complex product assembly quality. The method includes the steps that a multi-scale assembly coupling network model is constructed and used for analyzing the multi-scale error transitive relation among complex product assembly parts, so that formal description is performed on a complex product assembly relation; (2), multi-scale error accumulative effect analysis is performed, an error accumulative effect equation is established in the complex product assembly process through analyzing a coupling relation among nodes on different scales inside a network, so that influences on the product assembly quality by process errors are analyzed in a quantified mode; (3) error sensitivity analysis and control are performed, a sensitivity effect equation of the errors is established in the assembly process, and the error sensitivity direction affecting the product assembly quality is recognized, corresponding error compensation measures are executed, so that the complex product assembly quality is analyzed and controlled, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of manufacturing process quality control and relates to an error sensitivity analysis and control method for complex product assembly quality. Background technique [0002] There are various error transmission effects in the assembly process of complex products. For example, the processing error of assembly parts evolves into assembly error through assembly relationship, and the assembly error caused by positioning, constraint, and reference relationship in the assembly process will affect the assembly quality of the final product. . Aiming at the quality improvement of the assembly process, academic circles at home and abroad have carried out extensive research from different angles, and proposed corresponding solutions: 1) Xu Bensheng and others constructed the Jacobian matrix of the assembly function relative to the change of the assembly characteristics of each part , and combined with the feature degree of freed...

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Problems solved by technology

[0003] Existing research on complex product assembly quality control methods mainly focuses on the system level and the design stage, and does not provide a set of quality control and improvement methods for complex product assembly processes to guide the actual assembly process

The error accumulation modeling mainly focuses on the impact of the final error accumulation effect on product quality in the process, and fails to give the error sensitive direction that affects product quality. The proposed hybrid assembly line modeling and configuration research mainly analyzes the process configuration from the system level. Reasonable optimization to reduce the accumulation of process errors, but due to the inevitable and unpredictability of process errors, it cannot effectively improve product quality

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