通过在拉深模具结构中,采用氮气弹簧用作拉深模具的弹顶部件,来替代传统模具中的橡胶或金属弹簧压边零件,较好地解决了拉深成形中的拉裂或起皱缺陷。由于氮气弹簧具有恒定而平稳的弹力特性,使压边力始终保持在一个稳定的数值范围内,因此保证了被加工材料顺利地进入凹模型腔,生产出的磁轭零件不破裂、圆周表面光滑。此项技术的应用,极大地改善了材料的拉深性能,使价格低廉的热轧酸性钢板应用于拉深材料行列,从而降低了生产成本。 By adopting the nitrogen spring as the spring top part of the drawing mold in the drawing mold structure, instead of the rubber or metal spring blank holder part in the traditional mold, the crack or wrinkle in the drawing forming is well solved defect. Because the nitrogen spring has a constant and stable elastic characteristics, so that the blank holder force is always maintained within a stable numerical range, thus ensuring the processed material smoothly into the cavity, the yoke parts produced without rupture, smooth circumferential surface . The application of this technology has greatly improved the material’s drawing performance and made the low-cost hot-rolled acid steel used in the drawing materials, thus reducing the production cost.