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为研究多道次成形条件下薄壁筒形件滚珠旋压的成形机理,采用实验和有限元法相结合对薄壁筒形件多道次滚珠旋压的应力应变、旋压力和成形性进行了分析。结果表明:各道次下的等效应力和等效应变都是由旋压件的内表面向外表面逐渐增大,且随着旋压道次数的增加,等效应力和等效应变也都是逐渐增大;每道次的轴向旋压力随着滚珠行程的增加而增大,且各道次的旋压力也逐渐增大;多道次滚珠旋压时,由于采用较小的壁厚减薄量和材料的加工硬化,金属易于稳定流动,能够保证管坯的轴向伸长。因此,通过多道次滚珠旋压可实现大减薄量薄壁筒形件的旋压成形。
In order to study the forming mechanism of ball spinning of thin-walled cylindrical parts under multi-pass forming conditions, the stress-strain, spinning pressure and formability of multi-pass ball spinning of thin-walled cylindrical parts were experimentally combined with finite element method analysis. The results show that the equivalent stress and equivalent strain of each pass increase gradually from the inner surface to the outer surface of the spinning component, and as the number of spinning passes increases, the equivalent stress and equivalent strain Is gradually increased; each axis of the axial spin pressure increases with the ball stroke increases, and the pressure of each pass gradually increases; multi-pass ball spinning, the use of smaller wall thickness Thinning and material hardening, the metal is easy to steady flow, to ensure the axial elongation of the tube. Therefore, it is possible to realize the spin-forming of a large-thickness thin-walled cylindrical member by multi-pass ball spinning.