１引言在金属板料变形过程中，受压缩的材料产生失稳是零件破坏的先兆，随着压力继续增加，材料将丧失原有的平衡，使变形失败或构件破坏。但对于某些工件，则可以利用材料限制性失稳即人为的引导材料失稳进行成形。图１所示的密封圈座为筒壁内凹回转体零件，如采用常规工... 1 Introduction In the process of sheet metal deformation, the instability of the compressed material is a precursor to the destruction of the part. As the pressure continues to increase, the material will lose its original balance and cause failure or failure of the component. However, for some workpieces, the instability of the material can be utilized to control the instability of the material. Figure 1 shows the seat ring for the bowl wall concave rotary body parts, such as the use of conventional ...