Cutting tool for differential case processing, differential case processing machine, and differential case processing method

摘要

A cutting tool (35) for cutting a spherical inner surface of a differential case (10) mounted on a processing machine, comprising: a shaft portion (50); and a laterally protruding portion from the shaft portion (50). A cutting blade (51), a fixing portion (53) formed on one end of the shaft (50) for fixing the shaft (50) to the processing machine, and a fixing portion (53) on the other end of the shaft (50). And a holding portion (54) for holding the shaft portion (50) with the processing machine, wherein both the fixed portion (53) and the holding portion (54) are supported by the processing machine. Thus, the spherical inner surface of the rotating differential case (10) can be cut.