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采用单点连续渐进成形和点压渐进成形分别对网孔板进行定角度锥杯实验,实验结果显示单点连续渐进成形极限角为48°,大于点压渐进成形极限角为45°。采用这两种渐进成形方式,网孔板变形区域的圆孔均变成椭圆孔。通过测量这两种渐进成形42°定角度锥杯椭圆孔长轴尺寸,表明单点连续渐进成形网孔变形相对较小。采用动态有限元软件,模拟这两种渐进方式成形42°定角度锥杯过程,研究对比其应变、厚度及成形力的变化。模拟结果表明,点压渐进成形网孔板应变、厚度变化波动范围较小,成形力较单点连续渐进成形减小了44%,这两种渐进成形网孔板锥杯的椭圆孔短轴侧厚度较长轴侧厚度减小很多。
The single-point continuous progressive forming and point-pressing progressive forming were used to test the angular plate of the mesh plate. The experimental results show that the single point continuous progressive forming limit angle is 48 ° and the incremental forming angle limit is 45 °. With these two progressive forming methods, the circular holes in the deformed area of the mesh plate become elliptical holes. By measuring the long axis sizes of these two kinds of progressive forming elliptical holes of 42 ° fixed angle cone, it shows that the deformation of single continuous progressive mesh is relatively small. Dynamic finite element software was used to simulate the progress of these two kinds of progressive forming 42 ° cone angle cup process, the study of its changes in strain, thickness and forming force. The simulation results show that the variation of strain and thickness of the orifice plate under progressive pressure is small and the forming force is reduced by 44% compared with that of single-point continuous progressive forming. The short axis sides The thickness of the longer axis decreases a lot.