设计制造了管材外压成形试验装置,在该装置上实现了管材外侧的高压密封和内部芯模的拆装.采用碳钢管进行了薄壁空心花键件的外压成形试验研究,利用液体介质在管坯外部建立静水压力,使坯料横截面缩小并成形到置于其内部的芯模上,从而获得了空心花键形状的试验件.试验反映了外压成形压力较低、壁厚分布较均匀的特点,所获得的成形件内表面形状与芯模的外表面形状基本一致,同时,成形中不同键位管壁失稳的随机性,对成形件壁厚分布有一定影响.
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