Numerical Study on the Low Pressure Die Casting of AZ91D Wheel Hub

2005 ◽  
Vol 488-489 ◽  
pp. 393-396 ◽  
Author(s):  
Ying Hong Peng ◽  
Da Yong Li ◽  
Ying Chun Wang ◽  
Ji Long Yin ◽  
Xiao Qing Zeng
Keyword(s):  
Cooling System ◽  
Numerical Study ◽  
Liquid Fraction ◽  
Die Casting ◽  
Casting Process ◽  
Low Pressure ◽  
Cooling Capacity ◽  
Simulation Software ◽  
Low Pressure Die Casting ◽  
Pressure Die Casting

Most magnesium alloy components available for automobile are made through die casting. In this paper, PAM-CASTTM, commercial die casting simulation software based on the finite difference method, is employed to simulate the low-pressure die casting process of magnesium wheel hub. The temperature field and velocity field during filling and solidification stages are analyzed; the evolution of temperature distribution and liquid fraction was numerically studied. Then, the potential defects including the gas entrapments in the middle of the spokes, shrinkages between the rim and the spokes are predicted. The cooling performance of mould during casting is also investigated. Via analyzing the shrinkage defects generated under various cooling conditions, the cooling system set in the side mould is found to be more effective for enhancing the cooling capacity at the rim/spoke junction areas. With this cooling system, the hot spots at the junctions are obviously reduced and product quality is improved.

Numerical Simulation for Low Pressure Die Casting of Al-Alloy Motor Enclosure and Technology Improvement

2008 ◽  
Vol 575-578 ◽  
pp. 1389-1395 ◽  
Author(s):  
Guo Fa Mi ◽  
Xiang Yu Liu ◽  
Kuang Fei Wang ◽  
Ji Tai Niu
Keyword(s):  
Numerical Simulation ◽  
Cooling System ◽  
Die Casting ◽  
Low Pressure ◽  
Simulation Software ◽  
Al Alloy ◽  
Distribution Rule ◽  
Technology Improvement ◽  
Low Pressure Die Casting ◽  
Pressure Die Casting

The FDM numerical simulation software, View-Cast system, was employed to simulate the mould-filling and solidification process in low pressure die casting (LPDC) of Al-alloy motor enclosure. The distribution of liquid fraction, temperature field and the solidification pattern of casting were revealed and the formation mechanism as well as distribution rule of the potential defects, namely gas pores and shrinkage pores, were predicted. Furthermore the solutions to eliminate them were presented. By reducing the pouring rate, the turbulent flow at the corner of casting had eased, so the gas pores could be eliminated. Then the force-cooling system was installed on the top of mould, which could reduce the volume of liquid islands efficiently so that the shrinkage defects can be decreased to its limit.

Development of an Innovative Low Pressure Die Casting Process for Aluminum Powertrain and Structural Components

2018 ◽  
Vol 21 (6) ◽  
pp. 1800105 ◽  
Author(s):  
Mikel Merchán ◽  
Pedro Egizabal ◽  
Maider García de Cortázar ◽  
Ane Irazustabarrena ◽  
Haize Galarraga
Keyword(s):  
Die Casting ◽  
Casting Process ◽  
Low Pressure ◽  
Structural Components ◽  
Low Pressure Die Casting ◽  
Die Casting Process ◽  
Pressure Die Casting
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