英语翻译消失模铸造具有生产效率高、精度高、产品质量好、污染小等特点.本文将铝合金缸体作为研究对象,基于数值模拟软件Pro

EPC casting has such distinguishing features as high production efficiency,high precision,good product quality ,less polluting and so on.This paper will focused on the aluminum alloy cylinder , a numerical simulation will be carried out for the mould and solidifaction of cylinde block EPC casting ,based on ProCAST,a numerical simulation software,and a optimal process plan will be determined to shorten the test cycle, save production costs, improve product quality, so as to guide the actual production.
The most important and largest part of a engine is the cylinde block . Because of the complication of the structure and the uneven of the wall thickness of the cylinde block,this is the focus and the difficult part of the engine production, the casting of the cylinde block is directly related to the level of the quality of the engine.This paper analyzes the cylinder block structure, two types of gating system are designed: top gating system and step gating system.As a result of simulating both the filling and solidification process,comparing to the temperature of the flow field and the predict of shrinkages and macroporosity of the two gating systems,we found that top gating system is relatively stable when filling, solidification temperature gradient is smaller, distribution is more uniform, cooling speed is faster, is good for reducing the thermal stress, refining grain , geting uniformly distributed organizational structure. So the top gating system is more reasonable. Rearch
Then, the impact between temperature,pattern density ,vacuum degree with shrinkages and macroporosity of the cylinde block has been carried out in this paper.Studies showing:
three factors impact the defect in a decreasing order is density, pouring temperature, vacuum degree. The combination of the minimum propensity to form casting shrinkage and macroporosity is pouring temperature of 730 ℃, vacuum degree of 30kPa and pattern density of 18g / L.
Therefore, this paper determine the final process paln. For the EPC casting of the aluminum alloys cylinde block （ZL101） , we adopt the EPS (polystyrene) as the pattern materials, select the top gating system, casting temperature is 730 ℃, vacuum degree is 30kPa and pattern density is 18g / L.

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