| 摘要 |
PROBLEM TO BE SOLVED: To improve a process tolerance of a small diameter of an internal bevel gear formed by pinion tooth cut processing.SOLUTION: A helical pinion cutter 1 for forming an internal bevel gear by a pinion tooth cut processing on an inner peripheral surface of a processing object is equipped with a tooth surface forming cutter 4 and a tooth tip finishing cutter 5. The tooth surface forming cutter 4 advances in a processing direction while rotating around a rotation axis 20 thereby forming a tooth surface of an internal bevel gear on the inner peripheral surface of the processing object. The tooth tip finishing cutter 5 is located on the posterior of the tooth surface forming cutter 4 in the processing direction and rotates integrally to the tooth surface forming cutter 4, thereby cutting a tooth tip of the internal bevel gear formed by the tooth surface forming cutter 4.SELECTED DRAWING: Figure 1 |
