DesignandVerification_省略_rHighVacuumDieC.pdf

CHINESE JOURNAL OF MECHANICAL ENGINEERING Vol. 23,aNo. 5,a2010 ·547 · DOI: 10.3901/CJME.2010.05.547, available online at ; Design and Verification of an Auxiliary System for High Vacuum Die Casting 1, 2, *, 1 2 1 GE Xiaohong HUANG Hongwu , LI Hui , and LIU Yadan 1 School of Physics and Mechanical Electrical Engineering, Xiamen University, Xiamen 361005, China 2 Institute of Material Processing and Die Mould Integrated Technology, Xiamen University of Technology, Xiamen 361024, China Received January 26, 2010; revised August 18, 2010; accepted August 25, 2010; published electronically August 26, 2010 Abstract: Vacuum die casting is the optimal method to produce high quality aluminum alloy components. At present, there are still very few systematic studies on vacuum die casting theory and equipment design. On the basis of the existing theories of the vacuum die casting pumping and venting systems, a simplified model is established in this research. The model has an aggregate unit consisted of “vacuum pump + buffer tank” and a cylindrical container (including the shot sleeve, cavity and exhaust channel). The theoretical analysis is carried out between the cavity pressure and the pumping time under different volume models. An auxiliary system for high vacuum die casting is designed based on the above analysis. This system is composed of a vacuum control machine and a new vacuum stop valve. The machine has a human-computer control mode with “programmable logic controller(PLC