有模单点渐进成形工艺参数对1060铝合金成形性能的影响

Influence of process parameters of single-point incremental forming with die on formability of aluminum alloy 1060

为了研究各工艺参数对有模单点渐进成形直壁筒形件成形性能的影响,采用正交实验法,对层间距、工具头半径、进给速度和成形道次4个工艺参数进行优化设计,对板料变形区厚度进行仿真研究,并通过极差分析,得出各工艺参数对成形后板料最小厚度的影响。研究结果表明:各工艺参数中,成形道次数对板料成形最小厚度影响最大,工具头半径影响最小;对1 mm厚的1060铝合金板进行优化后,最小成形厚度为0.389 mm,比2道次成形后的最小厚度0.242 mm提高了60%。因此,在有模单点渐进成形直壁筒形件过程中,成形时间允许时,可适当增加成形道次,提高成形质量。

In order to study the influences of each process parameter on the forming performance of single-point incremental forming with die of straight-wall cylindrical parts, four parameters about layer spacing, tool head radius, feed rate and forming passes were optimized and designed by orthogonal test respectively. Then, the thickness of sheet deformation zone was simulated, and the influences of each process parameter on the minimum thickness of sheet after forming were obtained by range analysis. The research indicates that in the process parameters of sheet metal forming, the largest influence on the minimum thickness is forming passes, while tool head radius is the smallest. After optimizing the aluminum alloy 1060 plate with 1 mm thickness, the optimized thickness of sheet is 0. 389 mm, which is 60% higher than the minimum thickness of 0. 242 mm after two passes. Therefore, in the incremental forming process of strainght-wall cy- lindrical parts, the number of forming passes can be appropriately increased under conditions permitted by forming time to improve the forming qullity.