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

• Autorzy: Wang Zhiming , Yuan Hao

Identyfikatory

DOI

10.17531/ein.2021.3.17

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

precision allocation; comprehensive error; machining accuracy reliability; sensitivity analysis; advanced importance sampling method

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2021
• Tom: Vol. 23, no. 3
• Strony: 559--568
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Wang Zhiming

• School of Mechanical and Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050, China

autor

Yuan Hao

• School of Mechanical and Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).