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Hao H.,Shaanxi Fast Auto Drive Group Company | Zhang K.,University of Duisburg - Essen | Ding S.X.,University of Duisburg - Essen | Haghani A.,University of Rostock | Luo H.,University of Duisburg - Essen
2014 IEEE Conference on Control Applications, CCA 2014 | Year: 2014

A data-based framework is established for performance management in large-scale industrial processes. The main objective is to introduce the new framework and study the needed revisions, extensions and combined use of different methods under the proposed framework. © 2014 IEEE. Source


Ma H.-B.,Shaanxi Fast Auto Drive Group Company | Chuan H.-J.,Shaanxi Fast Auto Drive Engineering Research Institute
Zhuzao/Foundry | Year: 2015

Through the contrast between before and after structure optimization of back cover, this paper analyzes the product's internal quality and its static torsion of assembly. Different test methods such as X-ray cutting sampling and static torsion test have been applied to the studies on quality of products. The results show that the optimized performance of back cover has a greater improvement. The weight of products is reduced 0.8 kg. And it is able to economize materials. The microstructure of the product is compact, uniform, the die casting defects such as porosity and shrinkage cavity were relieved. The static torsion performance is increased from 5 941 N·m to 6866 N·m. So the optimized back cover can completely meet the requirement of commercial auto transmission. © 2015, Chinese Mechanical Engineering Society. All right reserved. Source


Dong Q.Z.,Shaanxi Fast Auto Drive Group Company | Zhu Z.W.,Beijing Petroleum Machinery Factory
International Heat Treatment and Surface Engineering | Year: 2014

In this paper, the carburising process of steel foil was simulated by numerical method and the carbon transfer coefficient β at the workpiece surface was calculated with the conventional formula for the steel foil carburising test. The results indicated that foil thickness, carburising time and carbon diffusion coefficient in foil apparently affect the calculated carbon transfer coefficient, which always has a smaller value than the preset β value (the true value) and decreases with decreasing carbon diffusion coefficient. This paper suggests that the conventional formula is applicable only when carbon diffusion coefficient in foil is close to infinity; otherwise, the calculated β has obvious error and consequently, gives false information about the influences of other test factors. We propose a new calculation method based on the analytical solution of the diffusion equation during steel foil carburising and a supplementary test, with which the calculated β coefficient is close to the true value, and the carbon diffusion coefficient can be obtained simultaneously. © 2014 IHTSE Partnership. Source


Ma F.-G.,Shaanxi Fast Auto Drive Group Company
Jinshu Rechuli/Heat Treatment of Metals | Year: 2010

In allusion to the microstructure defects occurring during forging for SAE8620RH steel, a typical process of isothermal normalizing was mentioned and the relationship between the cooling rate and microstructure was analyzed. Meanwhile, the uniformity of hardness of forgings after isothermal normalizing, the factors of shape and environment towards forgings, the countermeasures of overheating microstructure are discussed. Source

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