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Distribution of Metal Flowing into Unloaded Area in the Local Loading Process of Titanium Alloy Rib-Web Component
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Distribution of Metal Flowing into Unloaded Area in the Local Loading Process of Titanium Alloy Rib-Web Component
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National Natural Science Foundation of China for Key Program (50935007); National Basic Research Program of China (“973” Program, 2010CB731701)

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    摘要:

    對(duì)于通過(guò)模具分區(qū)實(shí)現(xiàn)的等溫局部加載成形，為了減少加載區(qū)對(duì)未加載區(qū)的不利影響，一般會(huì)采用筋上分區(qū)模式。由于局部加載特征，在成形過(guò)程中加載區(qū)部分材料會(huì)流向未加載區(qū)。流入未加載區(qū)材料的分配對(duì)成形過(guò)程分析、材料流動(dòng)控制、成形質(zhì)量改進(jìn)都有著重要影響。從加載區(qū)流入為未加載區(qū)材料的分配主要由未加載區(qū)的形狀和模具分區(qū)附近的幾何參數(shù)所確定。若未加載區(qū)是已成形區(qū)，部分流向未加載區(qū)的材料充填分區(qū)筋型腔。應(yīng)用偏最小二乘回歸建立了流入分區(qū)筋型腔材料比率的預(yù)測(cè)模型。數(shù)值結(jié)果表明流向未加載區(qū)材料分配的分析和所建立的預(yù)測(cè)模型是合理的。

    Abstract:

    For isothermal local loading process by means of partitioned die, the partition at a rib is generally adopted in order to reduce the disadvantageous influence of loading area on unloaded area. In the local loading process, some metal (flow-into metal) in loading area flow into unloaded area due to the local loading characteristic. The distribution of the metal flowing into unloaded area plays an important role in analyzing the forming process, controlling the metal flow, and improving the forming quality. The distribution of flow-into metal coming from loading area is mainly determined by the shape of the unloaded area and the geometric parameters near the die partitioning boundary. If the unloaded area is a formed area then some of the flow-into metal will fill the cavity of partitioning rib. A predicted model for the ratio of flow-into metal distributed to cavity of partitioning rib has been established by using partial least squares regression. The numerical simulation result indicates that the analysis on distribution of flow-into metal and the predicted model are reasonable.

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張大偉,楊 合. Distribution of Metal Flowing into Unloaded Area in the Local Loading Process of Titanium Alloy Rib-Web Component[J].稀有金屬材料與工程,2014,43(2):296~300.[Zhang Dawei, Yang He. Distribution of Metal Flowing into Unloaded Area in the Local Loading Process of Titanium Alloy Rib-Web Component[J]. Rare Metal Materials and Engineering,2014,43(2):296~300.]
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  • 收稿日期:2013-02-05
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  • 在線發(fā)布日期: 2014-06-03
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