锻压技术

铝合金旋转盘锻件等温精密成形工艺研究

英文标题：Study on isothermal precision forming process of aluminium alloy rotating disk

作者：吴继超张艳秋赵亚楠江树勇单德彬

分类号：

出版年,卷(期):页码：2014,39(1):14-20

摘要：

为选择合适的等温精密成形工艺，获得综合性能优良的铝合金旋转盘锻件，采用有限元法模拟分析了两种不同坯料条件下旋转盘锻件等温精密成形时的金属流动规律，并通过镦粗、预锻制坯和终锻工艺成形出了外形完美、综合性能优良的铝合金旋转盘锻件。结果表明：采用环形坯料成形时金属主要沿径向充填模膛，易产生充不满缺陷，而采用五角形坯料则使金属材料主要沿轴向充填模膛，可以预防该类缺陷的发生。虽然环形坯料在分模面的投影面积较五角形坯料的小，成形时所需载荷却大得多。因此，五角形坯料是等温精密成形旋转盘锻件的最佳坯料方案。

In order to choose an appropriate isothermal precision forming process and obtain the aluminium alloy rotating disk forging with excellent combination properties, the finite element method (FEM) was adopted to analyze metal flow laws of isothermal precision forming of rotating disk based on two different billets. The aluminium alloy forging of rotating disk with perfect shape and excellent combination properties was obtained by the process of upsetting, preforging and finish forging. The results show that the metal flows mainly along the radial direction in the process of forging when the ring billet is adopted, and underfilling defect occurs very easily. However, the pentagon billet can prevent this kind of defect because it can make the metal fill the impression along axial direction. The load in forging the rotating disk with ring billet is much larger than that with pentagon billet even though the projected area of ring billet is smaller than that of pentagon billet. Therefore, the pentagon billet is the optimum billet project for isothermal precision forming of rotating disk.

基金项目：

国家自然科学基金资助项目(50775051)

吴继超（1973-），男，硕士，高级工程师

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