Abstract

With the development of the computing technology and the numerical calculating

technology, the compute was applied to the casting field more and more. The numerical

simulation technology can simulate the forming process of mold filling, the solidification, the

conduct heat, the stress field, the distribution of micro-organization and the shrinkage cavity and

so on in the casting without experiencing practical molding, and improve greatly the yield

efficiency and economic benefits. Therefore, the compute technology has become important

meanings in casting production.

In this thesis, firstly, the three-dimensional solid modeling of motor shell should be

achieved

by the advanced graphics software UG and then export it the *.stl file format.

Secondly, carry out a series of parameter settings and select the optimal number of mesh using

software "Anycasting". Thirdly, after completion of the pre-casting, this paper starts to investigate

the whole simulative process of casting. Besides the numerical simulation of the filling and

solidification process, the paper investigates the changing of the velocity field and temperature

field. The main research work and conclusions are presented as follows.

1. The three-dimensional solid modeling of motor shell should be

achieved

by the

advanced graphics software UG which is the pre-preparation phase of the numerical simulation.

The accuracy of the molding directly impact on the results of simulation.

2. The numerical simulation of the filling and solidification process can reflect the actual

condition of the casting, and can predict the possible foundry defect and its position in the cast

product.

3. The three-dimensional solid modeling of motor shell was sectioned and observed

macroscopically. The results showed that the position of shrinkage porosity defects was close to

the edge of the casting. But It was found that that the trend of shrinkage porosity defects increased

slightly which shows that This process is reasonable

Key words: three-dimensional solid modeling, numerical simulation, the filling