插齿机主轴筒内锥度弹簧的绕制,在本刊1965年2期曾经介绍。但是那种方法的心轴,制造比较麻烦,刚性有些不足。兰州机床厂卢永成师傅,在重新绕制这种锥度弹簧时,用了一种心轴,其刚性较好,制造又方便。它的结构如图所示。外径尺寸比弹簧的内径小8毫米,其锥度与弹簧的相同。为了取出心轴方便起见,再在这样一个两端有锥度的心轴上,车出一个螺距等于弹簧螺距的螺旋槽,其内径比弹簧小头的内径略为 Gear shaper mandrel taper spring winding system, published in 1965 2 period was introduced. However, the method of mandrel, making more trouble, some rigidity. Lanzhou Machine Tool Plant Mr. Lu Yongcheng, in the re-winding of this taper spring, with a mandrel, its rigidity is better, it is easy to manufacture. Its structure as shown. The outer diameter is 8 mm smaller than the inner diameter of the spring, with the same taper as the spring. In order to remove the mandrel convenient, and then in such a taper on both ends of the mandrel, the car out of a screw pitch equal to the pitch of the spiral groove, the inner diameter of the spring head slightly smaller than the inner diameter