Reliability analysis for CNC gear hobbing machine with a new hybrid model of dual weibull distribution

The reliability of CNC gear hobbing machine is the basic factor for ensuring the quality, which is the most important factor that constitutes the market competitiveness of products. Therefore, a hybrid model of dual Weibull distribution was proposed to analyze the malfunction characteristics of CNC gear hobbing machine in this paper. By using the actual experimental data from working-sites, the parameters for hybrid model of dual Weibull distribution were estimated through Weibull Probability Paper and mathematic software. Comparisons were carried out between single Weibull distribution with dual parameters and the proposed method. The results show that the proposed method provide higher agreement with experimental data plots.