Accuracy prediction method for linear guiderail pairs

Abstract

Disclosed is an accuracy prediction method for linear guiderail pairs. Accuracy degradation and vibration signals of a tested linear guiderail pair in a simulated working condition are monitored in a whole process, and monitoring results are used for training accuracy degradation neural networks with associative memory functions, accordingly, mapping relations between sensitive characteristics of the vibration signals of the tested linear guiderail pair and the accuracy are obtained accurately; and the sensitive characteristics of the current vibration signals of a linear guiderail pair with a same model specification with the tested linear guiderail pair are input into the accuracy degradation neural networks to obtain current accuracy of the linear guiderail pair, and accordingly, the online prediction of the linear guiderail pair accuracy is achieved. According to the accuracy prediction method for linear guiderail pairs, linear guiderail pairs can be purchased in advance according to the linear guiderail pair accuracy degradation trend when accuracy values can barely meet prescribed requirements, so that the tool stopping time is reduced, enterprise losses are decreased, and the enterprise cost is saved. Besides, effective bases and guidance are provided for analysis, determination and maintenance of operating personnel, and the service life of the linear guiderail pair is increased.

Description

technical field [0001] The invention relates to the field of mechanical system state monitoring and fault diagnosis, in particular to a method for predicting the accuracy of a linear guide pair. Background technique [0002] The linear guide rail pair is mainly composed of a slide rail, a slider and a rolling body between them. It is a rolling guide. The rolling body performs an infinite rolling cycle between the slider and the slide rail, so that the load platform on the slider can move along the Linear movement with high precision is easy on the slide rail. [0003] In recent years, with the implementation of the national equipment manufacturing revitalization plan and the development strategy of CNC machine tools, enterprises have become more and more dependent on CNC machine tools. As a key component of high-precision positioning of CNC machine tools, linear guide rail pair determines the machining accuracy of CNC machine tools to a certain extent, and is a key factor a...

AI Technical Summary

Problems solved by technology

When the accuracy of the linear guide rail pair does not meet the requirements, it must be replaced. However, due to the long cycle of spare parts, it will cause long-term shutdown of the machine tool and bring huge economic losses to the enterprise.

At the same time, the accuracy of the linear guide pair cannot be monitored online, and it is not conducive for operators to analyze the reasons for the decline in the accuracy of the linear guide pair in a timely manner, so that its operation and maintenance have a certain degree of blindness, reducing the service life of the linear guide pair

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