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Sheng W.,Shandong University of Technology | Zhao M.,Shandong University of Technology | Li G.,Shandong University of Technology | Sun X.,Shandong University of Technology | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2014

According to casting process of large Makino milling machine body, the filling and solidification process were simulated by the Anycasting software to understand temperature field and flow field. According to effect of filling temperatured 280°C d 320°C, 1 360°C, 1 400°C) and filling speed (1.0 m/s. 1.2 m/s, 1.4 m/s) on the casting process, influencing factors on the quality of milling machine body were analyzed. The results reveal that gas holes in the castings can be eliminated by adopting optimized parameters such as pouring temperature of 1320°C and filling velocity of 1.2 m/s as well as setting a riser at rational position to control the final solidification in the riser. Based on the temperature distribution in the milling machine body, shrinkage porosity (holes) is reduced, which provides a reference for practical production.


Zhao M.,Shandong University of Technology | Sheng W.-B.,Shandong University of Technology | Li G.-L.,Shandong University of Technology | Guo A.-L.,Shandong Dawang Jintai Group Co. | Wang T.-H.,Shandong Dawang Jintai Group Co.
Zhuzao/Foundry | Year: 2013

On the basis of the original casting process of large column casting, the casting simulation software AnyCasting was used to simulate the filling and solidification process of the casting. The regularities of temperature field change and solidification of the casting were analyzed according to the calculation results and principle of defect generation. The results show that the casting defects are in low value when chills are set in an appropriate location and the end-solidification position lies in thin walled section by the side of ingates or riser of the casting. By simulation of the two schemes, position of the chills was determined and the shrinkages in the casting were effectively eliminated, which meet the requirement of the production.


Sheng W.-B.,Shandong University of Technology | Zhao M.,Shandong University of Technology | Gu W.-L.,Shandong University of Technology | Li G.-L.,Shandong University of Technology | And 2 more authors.
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2014

Targeted at large-scale Makino milling machine castings, the filling and solidification process was simulated with Anycasting software, and the variations of internal temperature field and velocity field were analyzed. Furthermore, the occurrence of defects was predicted based on the calculating outcomes. The results showed that the full filling time of the cavity is 92 s and the solidification time is 948 s. Also, the shrinkage defects formed during the casting process are likely to appear on the hot spots or the top parts of the casting. The experiments confirmed that the shrinkage defects are efficiently eliminated when the process is treated by adding casting heads and installing cold irons at the shrinkage positions. In addition, by analyzing the relationship between box-broken time and casting cooling temperature field, the casting techniques were improved, the casting parameters were optimized, and the box-broken time was shortened so as to make qualified products. ©, 2014, Northeastern University. All right reserved.

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