论文部分内容阅读
为进一步阐明劈楔几何参数对劈挤成形的影响,以槽宽与槽深均为10mm的矩形槽为研究对象,固定劈刃倾角为30°,主要借助数值模拟方法,研究了45°～120°之间劈分角对劈挤成形的影响。结果表明:劈分角增大,塌角量以逐渐趋于平缓的减小幅度减小,槽口隆起最大高度以逐渐趋于平缓的幅度增加,槽口隆起影响宽度逐渐减小,推出的废料体积基本呈线性增大;劈分角增大,所需成形力峰值逐渐增大,进入稳态变形阶段行程延迟,稳态变形持续行程变短,且起始阶段增大的斜率较大,废料推出阶段成形力下降的斜率变化不大;劈分角增大,变形力下降的拐点出现更早,受力行程缩短,但变形功增大。从工艺应用的角度考虑,劈分角宜取较小值。
In order to further clarify the influence of the wedge geometry parameters on the wedge extrusion, taking the rectangular groove with 10mm groove width and groove depth as the research object, the inclination angle of the fixed wedge edge is 30 °. ° split between the angle of the split-forming extrusion. The results show that the increase of cleavage angle and the decrease of the amount of collapsing gradually decrease gradually. The maximum height of notched ridge increases gradually to a gentle extent, and the influence width of notched uplift gradually decreases. The volume increases basically linearly. When the split angle increases, the peak value of forming force increases gradually, and the stroke goes into the steady deformation phase. The steady stroke of the steady deformation becomes shorter and the slope of increase of the initial phase increases. During the launch stage, the slope of the decrease of forming force was small; the turning angle of the split angle increased, the deformation point decreased earlier, the force stroke shortened, but the deformation work increased. From a process application point of view, cleavage angle should take a smaller value.