Abstract. With the development of AMT (Advanced Manufacturing Technology), the greater demands have been placed on the Chinese higher education system in recent years. Characteristics of drawing courses in Chinese colleges and the advanced engineering education mode---OBE (Outcomes-based Education) were introduced firstly, and the requirements of AMT for the reform of drawing courses were presented. Moreover, the existing problems in traditional teaching model were listed, and the reform plans based on the discussing class and team project were proposed. In addition, the implementation details of teaching reform of drawing courses were given. In the end, the teaching reform practice was accomplished in Yanshan University and the students' achievements based on the discussing class and team project were shown in this paper.
The contact between two rough surfaces is essentially the contact between micro-bulge of different shapes. In the process of interference fit, the distribution of contact area and contact stress at different positions of the two rough contact surfaces is uneven. In this paper, based on the test results of the morphology of machined surfaces with different surface roughness, a two-dimensional curve model of the contact surface is established according to the W-M fractal function and Matlab software. The contact area and contact load are analyzed with a two-dimensional finite element contact model of the double rough surface that established with Abaqus software. And the effect of surface roughness and surface displacement on the contact area and contact load is analyzed with the finite element contact model.
For studying the metal's three-dimentional platic flow mechanism along the longitudinal direction and lateral direction in rail universal rolling, the relationship between the metal flow volume and the elongation coefficient of different parts of rail was proposed, then the elongation coefficient of different parts of rail were derived on the base of the law of volume constancy, then the flow volume between different parts of rail were obtained. Moreover, the integrated deformation influence factor was introduced into this model to express the influence of the spread coefficient and the reduction coefficient of different parts of rail on the metal's three-dimentional plastic flow. Compared with the experimental results, the prediction error of analytical model for elongation coefficient is less than 5%, and the the prediction error of analytical model for flow volume is not greater than 16%.
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