采用先进的重要采样方法提高多轴数控机床的加工精度可靠性

IF 2.2 3区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2021-07-07 DOI:10.17531/EIN.2021.3.17

Zhiming Wang, Hao Yuan

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引用次数: 2

摘要

本文的目的是根据一定的设计要求，提出一种通用的精度分配方法，以提高数控机床的加工性能。利用坐标系的微分运动关系，建立了机床的综合误差模型。在综合误差模型的基础上，采用先进的重要抽样法对初级可靠性进行更新，建立了可靠性模型，用于机床加工精度可靠性预测。此外，为了识别和优化对机床加工精度可靠性影响较大的几何误差参数，采用改进的一阶二阶矩法对加工精度进行了灵敏度分析。以某大型数控龙门导轨磨床为例，优化结果表明该方法是有效的，可以实现加工精度的可靠性优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Enhancing machining accuracy reliability of multi-axis CNC machine tools using an advanced importance sampling method

The purpose of this paper is to propose a general precision allocation method to improve machining performance of CNC machine tools based on certain design requirements. A comprehensive error model of machine tools is established by using the differential motion relation of coordinate frames. Based on the comprehensive error model, a reliability model is established by updating the primary reliability with an advanced importance sampling method, which is used to predict the machining accuracy reliability of machine tools. Besides, to identify and optimize geometric error parameters which have a great influence on machining accuracy reliability of machine tools, the sensitivity analysis of machining accuracy is carried out by improved first-order second-moment method. Taking a large CNC gantry guide rail grinder as an example, the optimization results show that the method is effective and can realize reliability optimization of machining accuracy.

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来源期刊

Eksploatacja I Niezawodnosc-Maintenance and Reliability ENGINEERING, MULTIDISCIPLINARY-

CiteScore

5.70

自引率

24.00%

发文量

审稿时长

3 months

期刊介绍： The quarterly Eksploatacja i Niezawodność – Maintenance and Reliability publishes articles containing original results of experimental research on the durabilty and reliability of technical objects. We also accept papers presenting theoretical analyses supported by physical interpretation of causes or ones that have been verified empirically. Eksploatacja i Niezawodność – Maintenance and Reliability also publishes articles on innovative modeling approaches and research methods regarding the durability and reliability of objects.