圆锥内圈毛坯采用一次加热热挤压时,由于所需压力机吨位较大,限制了该工艺的应用范围。改用一次加热两工步热挤压成形工艺后,分解了变形应力,因而压力机吨位减少,从而解决了内径ф60mm以下的圆锥内圈的热挤压工艺问题。文中介绍了模具主要尺寸的计算公式。附图4幅,表1个。 Conical inner ring rough with a heating hot extrusion, due to the larger tonnage required presses, limiting the scope of application of the process. Switch to a two-step heating two-step hot extrusion forming process, the decomposition of the deformation stress, thus reducing the tonnage of the press, thus solving the inner diameter ф60mm below the cone inner ring hot extrusion process problems. The paper introduces the calculation of the main dimensions of the mold. Figure 4, Table 1.