SIMULATION OF SQUEEZE CASTING FOR FIBER REINFORCED CASTINGS

纤维增强铸件挤压铸造模拟

• 批准号: 02452239
• 负责人: OHNAKA Itsuo
• 金额: $ 4.42万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452239/
• 关键词: SQUEEZE CASTING; FIBER REINFORCED CASTING; COMPUTER SIMULATION; FLUID FLOW; MOLD FILLING; スクイズ鋳造法; 繊維強化鋳造品; 繊維強化材料; 溶湯流動; コンピュ-タシミュレ-ション; 繊維強化複合材料; アルミニウム合金; 流動解析; 凝固解析; プリフォ-ム

The squeeze casting is the most economical and promising method to produce fiber reinforced metallic composite casting. The final research aim is to develop a computer software which can simulate the casting process to save time and cost of development of composite castings. Main results are as follows:(1) Mold filling behavior in a metallic mold could be observed directly through a heat-resistant glass mold by using CCD camera. It was found that the flow is not always symmetry even in a symmetric mold cavity. The flow in the cylinder and gate affects considerably the flow in the cavity. When melt temperature is low and solidification occurs, the flow considerable changes from estimated one for the case without solidification.(2) Fluid flow during filling a mold cavity with a preform was directly observed by using a low pressure type machine and water, mercury and wax. It was found that the position of vent is very important, affecting the filling behavior.(3) A computer simulation program where laminar and D'Arcy flows are assumed in the cavity and preform, respectively, has been developed. The program can rather well simulate the observed results.(4) Although it was planned to examine the cast structure of fiber reinforced aluminum composite casting, it was difficult to produce sound castings, because heating of the preform and preventing from the flow between the preform and mold. Further, it is not easy to measure temperature change during mold filling, because the cooling is very fast. This work will be continued further in our laboratory.

挤压铸造是生产纤维增强金属复合材料铸件最经济、最有前途的方法。最终研究目标是开发一种可以模拟铸造过程的计算机软件，以节省复合铸件开发的时间和成本。主要结果如下：(1)利用CCD相机可以通过耐热玻璃模具直接观察金属模具中的充模行为。人们发现，即使在对称的模具型腔中，流动也并不总是对称的。气缸和浇口中的流动对型腔中的流动影响很大。当熔体温度较低且发生凝固时，流动与未凝固情况下的估计流动有很大变化。(2)使用低压型机器以及水、汞和蜡直接观察用预成型件填充模具型腔期间的流体流动。结果发现，排气口的位置非常重要，会影响填充行为。(3)开发了一种计算机模拟程序，其中分别假设型腔和预成型件中为层流和达西流。该程序可以很好地模拟观察到的结果。(4)虽然计划检查纤维增强铝复合材料铸件的铸造结构，但由于预制件的加热以及预制件和模具之间的流动阻碍，很难生产出完好的铸件。此外，由于冷却速度非常快，因此不容易测量模具填充过程中的温度变化。这项工作将在我们的实验室进一步继续进行。

项目成果

大政 光史: "低圧鋳造における溶融アルミニウム、水銀および水の鋳型充てん時の流れ挙動の比較" 鋳物. 64. 167-172 (1992)

Mitsushi Omasa：“低压铸造中熔融铝、汞和水充模过程中流动行为的比较”铸造，64. 167-172 (1992)。

M.Ohmasa and I.Ohnaka: "Comparison of Flow Behavior during Mold Filling of Molten Aluminum, Mercury and Water in Low Pressure Die Casting" The Journal of the Japan Foundrymen's Society. 64. 167-172 (1992)

M.Ohmasa 和 I.Ohnaka：“低压压铸中熔融铝、汞和水充模过程中流动行为的比较”日本铸造学会杂志。

I.OHNAKA: "Comparison of Measured and Simulated Fluid Flos in Low Pressure Die Casting" Modeling of Costing,Welding and Advanced Solidification Prousses,V, ed,by M.Rappaz et al.783-788 (1991)

I.OHNAKA：“低压压铸中测量和模拟流体流动的比较”成本计算、焊接和高级凝固 Prousses 建模，V，编辑，M.Rappaz 等人。783-788 (1991)

M.Ohmasa and I.Ohnaka: "Computer Simulation of Mold Filling (II:experiments and comparison)" Proc. of Modeling of Casting and Solidification Processes, 1991, ed by C.P.Hong et al.133-138 (1991)

M.Ohmasa 和 I.Onaka：“模具填充的计算机模拟（II：实验和比较）”Proc。

大政 光史: "低圧鋳造における溶融アルミニウム,水銀および水の鋳電光てん時の流れ等動の比較" 鋳物. 64. 167-172 (1992)

Mitsufumi Omasa：“铸造灯时低压铸造过程中熔融铝、汞和水的流动动力学比较”铸造，64. 167-172 (1992)。