Transactions of Materials and Heat Treatment

Title：Minimal repairing reliability assessment for hydraulic sheet metal bending machine

Authors： Zhang Genbao Liu Jie Cheng Yansong

Unit： College of Mechanical Engineering Chongqing Technology and Business Institute

KeyWords： reliability assessment bending machine power law process Delta method

ClassificationCode：

year,vol(issue):pagenumber：2014,39(1):74-79

Abstract：

An approach of assessing reliability for hydraulic sheet metal bending machines based on Power Law Process (PLP) was proposed, and a PLP function for failure times was built. Trend test and renewal test were performed on the failure data to assure the validity of application for PLP. Point and confidence interval estimators were given by maximum likelihood method and Fisher information matrix. Point estimates of reliability metrics were also derived with their confidence bounds offered through Delta method. Akaike information and Bayesian information criterion demonstrate that PLP outperforms Weibull distribution method and General Repair Process and is capable to capture the instantaneous and cumulative reliability properties of bending machines.

Funds：

国家自然科学基金资助项目（50835008, 51175527）；国家科技重大专项“高档数控机床与基础制造装备”（2010ZX04014-015, 2011ZX04014-011, 2012ZX04011-031）;重庆市教委资助项目（KJ121602）

张根保（1953-），男，博士，教授、博导

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