Gear machining apparatus

摘要

A gear machining apparatus causes a machining tool and a workpiece to rotate at a high speed in synchronization with each other to machine a highly accurate gear through cutting. The machining tool is manufactured such that each of pitches between tool blades of the machining tool is an integer multiple of a pitch between teeth of the gear, the integer multiple being equal to or larger than double. By using the machining tool for cutting performed by the gear machining apparatus, the number of the tool blades of the machining tool, which are brought into contact with the workpiece at the same time, is reduced. Thus, it is possible to suppress occurrence of self-excited vibrations during cutting by reducing the cutting resistance. Thus, it is possible to enhance the tooth trace accuracy of the gear.

主权项

1. A gear machining method comprising the steps of:
providing a virtual machining tool; thinning out the tool blades of the virtual machining tool to thereby provide a machining tool; positioning the machining tool to have a rotational axis tilted with respect to a rotational axis of a workpiece; and feeding the machining tool in a direction of the rotational axis of the workpiece while causing the machining tool and the workpiece to rotate in synchronization with each other to machine a gear, wherein each of pitches between tool blades of the machining tool is an integer multiple of a pitch between teeth of the gear, the integer multiple being equal to or larger than two, and wherein a greatest common divisor between the number of tool blades of the virtual machining tool having the same pitch as the pitch between the teeth of the gear and the number of the teeth of the gear is an integer larger than one.