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我厂于1978年试验成功热压凹穴螺栓工艺,几年的生产实践,证明模具的结构合理,螺栓的质量稳定。热压凹穴螺栓工艺在J53-63-A或J53-100-A型双盘摩擦压力机上实现。热压的凹穴螺栓的形状如图1所示。冲头是热压凹穴螺栓头部成形的主要零件,其形状如图3和图4所示。图3所示的上冲头用于热压M10～M27标准缩梗螺栓。图4所示的上冲头用于热压M8、M10小六角头螺栓和M10不缩梗通扣螺栓。
I plant in 1978, the successful hot hole pocket bolt technology, production practice for several years to prove that the mold structure is reasonable, the quality of the bolt stability. Hot-pressing the cavity bolt process in the J53-63-A or J53-100-A double disc friction press to achieve. The shape of the hot-pressed cavity bolt is shown in FIG. 1. The punch is the main part of the head of the hot-pressed cavity bolt, and its shape is shown in FIG. 3 and FIG. 4. The upper punch shown in FIG. 3 is used for hot pressing M10 ~ M27 standard shrinkage bolts. The upper punch shown in Figure 4 is used to hot-press M8, M10 small hexagon head bolts and M10 non-shrink stem bolts.