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A Study on Feeding Technological Parameters of Crankcase in Multidirectional Squeeze Casting

Author: WangYi
Tutor: YingFuQiang
School: Zhejiang University of Technology
Course: Mechanical Design and Theory
Keywords: right crankcase multidirectional squeeze casting feeding Orthogonal Test
CLC: TG249.2
Type: Master's thesis
Year: 2012
Downloads: 41
Quote: 0
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Abstract


As the development of Green Manufacturing and Low Carbon Economy, the existing casting methods are not perfect for those products which have been changing to be more sophisticated and complex. The exploration and development of multidirectional squeeze casting bring this problem a new solution.1)The process of Reverse Modeling, Meshing and Finite-Element Analysis to the right crankcase was firstly accomplished. It’s successful to lower the weight of the right crankcase by 8.9% with the situation of that the maximum stress was smaller than the admissible stress.2) The mathematical model of feeding was established after analyzing the reasons of casting defects. It demonstrated theoretically that solidification under high pressure had good effects on refining crystal grain and reducing the defects of shrinkage porosity.3) Based on the conditions discriminant of shrinkage porosity and the numerical simulation results of indirect squeeze casting, the position of shrinkage porosity was forecasted. The multidirectional squeeze casting mold of right crankcase was designed.4) The feeding technological parameters (feeding force, feeding delay and feeding time) were analyzed and confirmed. Based on the methods of Orthogonal Test and Finite- Element Numerical Simulation of casting, the optimized feeding technological parameters were obtained, as a result, the defect of shrinkage porosity was eliminated.To sum up, with the situation of that the maximum stress was smaller than the admissible stress, the utilization rate of material was increased, simultaneously, the defect of shrinkage porosity was eliminated.The quality of the casting was improved.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Casting > Special Casting > Pressure die casting
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