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介绍了采用圆板坯旋压成形半锥角小于1°的LF6铝合金锥筒的成形试验。试验采用了平板毛坯、直筒与小锥度两套芯模、普旋加强旋的成形方案,在直筒芯模上把圆板坯加热普旋成圆筒,圆筒切底后在室温下对其强旋减薄,最后改用小锥度芯模加热普旋成小锥度筒。结果表明:确保旋前板坯的高质量,避免出现局部缺陷,控制好热旋时的加热温度是能够顺利成形的必要条件;LF6合金具有良好的旋压性能,选择合理的工艺参数,采用圆板坯可以旋压出半锥角小于1°的无缝筒。
The forming experiment of LF6 aluminum alloy conical tube with half cone angle of less than 1 ° by using circular plate blank is introduced. The test uses a flat blank, straight and small taper two sets of mandrel, general spin to strengthen the screw forming program, in the straight mandrel heating the round slab general spin into a cylinder, cut the cylinder at room temperature after its strong Spin thinning, and finally use a small taper mandrel heating general spin into a small taper tube. The results show that it is a necessary condition to ensure the high quality of the pre-rotating slab and avoid the local defects, and the heating temperature when controlling the hot spinning is a necessary condition for smooth forming. LF6 alloy has good spinning performance, reasonable process parameters, Slab can be a semi-cone angle less than 1 ° seamless cylinder.