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Shan S.Q.,North China Electrical Power University | Tian Z.G.,North China Electrical Power University | Guo F.J.,North China Electrical Power University | Ren J.X.,Baoding Lizhong Wheel Manufacturing Co.
Applied Mechanics and Materials | Year: 2014

With the rapid development of higher education, students copying work is becoming increasingly serious.The purpose of this paper is:first, geting the count and frequency of attribute used in program, and second using Chi-square test method to get the similarity between programs. This method has very good results for teachers to detect plagiarism. © (2014) Trans Tech Publications, Switzerland. Source


Xu C.,Beihang University | Xiao W.-L.,Beihang University | Wen S.-Z.,Beihang University | Zhen Y.-J.,Baoding Lizhong Wheel Manufacturing Co. | Ma C.-L.,Beihang University
Rare Metals | Year: 2015

The Al-5Ti-0.5B-0.5C grain refiner was prepared by powder metallurgy (PM). Microstructures of the grain refiner and its grain refinement performance in commercially pure aluminum (Al) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). It is found that the average grain size of commercially pure Al can be reduced from ~15,000 to ~180 μm by the addition of Al-5Ti-0.5B-0.5C grain refiner prepared by PM, based on 0.01 wt% Ti addition. The grain refinement efficiency begins to decrease slightly when the grain refiner is kept in the melt for 60 min. The grain refinement is attributed to high stability, proper size, and high density of Al3Ti, TiB2, and TiC particles. © 2015 The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg Source


Shan S.,North China Electrical Power University | Guo F.,North China Electrical Power University | Ren J.,Baoding Lizhong Wheel Manufacturing Co.
Advances in Intelligent and Soft Computing | Year: 2012

With the rapid development of higher education, students copying work is becoming increasingly serious. The purpose of this paper is:first, converting the program into assembly language, and then using the string comparison algorithm, the improved algorithm KR, to get the similarity between programs. This method has very good results for teachers to detect plagiarism. © 2012 Springer-Verlag GmbH. Source


Dai Y.-H.,Baoding Lizhong Wheel Manufacturing Co.
Zhuzao/Foundry | Year: 2015

To study the influence of natural aging on the performance of A356 aluminum alloy wheel and solve the problem of unqualified impact test, wheels are naturally aged for 0 h, 24 h, 48 h, 72 h, 96 h separately at room temperature after solution treatment at 540℃ for 6 h, then artificially aged immediately at 130℃ for 3 h separately. The mechanical properties of sample bars from outer flange and spoke, hardness of sample from hub were tested. The impact and bending fatigue properties were tested on finished wheels. The results show that after natural aging, tensile strength, yield strength and hardness tend to decrease, but elongation tends to increase. After 48 h natural aging, product can meet all requirements and the problem of unqualified impact test was solved. ©, 2015, Chinese Mechanical Engineering Society. All right reserved. Source


Dai Y.-H.,Baoding Lizhong Wheel Manufacturing Co. | Chu X.-X.,Baoding Lizhong Wheel Manufacturing Co.
Zhuzao/Foundry | Year: 2014

The purpose is to solve the problem of designing casting mould structure with inserting method for Al alloy spoke of two-piece wheels. According to the analysis for the conventional gravity mold structure and the closing and opening order of mould, the technologies were determined, a proper closing and opening order of spoke mold, the dowel was fixed in the upper mold, the notch and stiletto in the side mole, the guide key was fixed on the bottom of the side-moulds, the question for fixing the inserts was solved correctly. An analysis has been made for casting forming by using the numerical simulation software ProCAST. In the analysis, processing methods for the defects locations which may appear in the castings have been pointed out as well as the one for inserts controlling. Therefore, the solution for mould structure design has been determined. Source

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