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Deformation Mechanism of TA15 Shells in Hot Shear Spinning under Various Load Conditions
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Deformation Mechanism of TA15 Shells in Hot Shear Spinning under Various Load Conditions
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the National Natural Science Fund for Excellent Young Scholars of China (51222509); the National High Technology Research and Development Program of China (2008A404Z112); the National Natural Science Foundation of China (50405039) and the Project of 111 (B08040)

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    摘要:

    采用考慮了各種熱效應(yīng)而建立的TA15鈦合金加熱剪切旋壓多場(chǎng)耦合模型，研究揭示了TA15鈦合金在各種熱載荷和機(jī)械載荷條件下的變形機(jī)制。結(jié)果表明，高的工件加熱溫度和芯模預(yù)熱溫度可以減小工件厚向溫度梯度，偏離率對(duì)變形區(qū)厚向溫差的影響復(fù)雜，對(duì)貼模性影響顯著且大的偏離率會(huì)惡化貼模性。工件和旋輪間的摩擦對(duì)溫度差有顯著影響。增加旋輪進(jìn)給比會(huì)加大厚向溫差但有助于貼模性的改善，這與冷旋的結(jié)果相反。大的旋輪安裝角有助于減小厚向溫差和改善貼模性。

    Abstract:

    Using the multi-field coupled analysis model with considering various thermal effects for the hot shear spinning of TA15 titanium alloy thin-walled shells, the deformation mechanism of thermal load conditions and mechanical load conditions have been elucidated. The results show that higher workpiece temperature and mandrel preheat temperature can bring about a smaller temperature gradient in the thickness direction, and the deviation ratio has a complicated effect on temperature difference of the deforming zone and a marked negative effect on the fittability. Moreover, the friction between workpiece and roller has a significant influence on the temperature difference. Increasing roller feed rate increases the temperature difference and decreases the fittability, which is opposite to that of the cold shear spinning, and a larger roller setting angle is favorable to the decrease of temperature difference and the improvement of the fittability.

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韓 冬,詹 梅,楊 合. Deformation Mechanism of TA15 Shells in Hot Shear Spinning under Various Load Conditions[J].稀有金屬材料與工程,2013,42(2):243~248.[Han Dong, Zhan Mei, Yang He. Deformation Mechanism of TA15 Shells in Hot Shear Spinning under Various Load Conditions[J]. Rare Metal Materials and Engineering,2013,42(2):243~248.]
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  • 收稿日期:2012-03-25
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