大锥角圆锥滚子的特点是圆角大,这给滚子采用冲压工艺带来困难。目前所用冷镦机多靠滚子凹模型腔的锥孔部分将料坯夹住,然后冷镦成形。实践表明,凹模型腔锥孔半角超过2°,则冲压时会出现料歪斜定位,甚至掉料。现把凹模设计成两个角度,夹持料坯的部位半锥角是1°30’,其余部位半锥角与成品滚子相同。这样,大锥角圆锥滚子即可采用冷冲压工艺。附图3幅。 Large cone angle tapered roller is characterized by fillet, which gives the roller stamping process to bring difficulties. At present, the cold heading machine used by the concave part of the cavity of the roller cone material part of the blank clip, and then cold heading forming. Practice shows that concave mold cavity cone half-angle more than 2 °, the material will be skewed positioning stamping, and even fall material. The die is now designed for two angles, the half-cone angle is 1 ° 30 ’, and the remaining half-cone angle is the same as the finished roller. In this way, the large cone angle tapered roller cold stamping process can be used. Figure 3 Figure.