| 摘要 |
Provided is a method of measuring a gear wherein the movement range of a stylus is reduced during a measurement by reducing the distance of movement of the stylus in order to downside a machine. A method for measuring the profile of a gear by performing a synchronizing control on the movement of a stylus and the rotation of a work, and by moving the stylus linearly in a state where the stylus is kept in contact with the right tooth flank or left tooth flank according to the rotation of the work, wherein a tangent touching a contact point which is located after rotation of a predetermined rotation angle ± in one direction from a contact point on the base circle of the work, and a tangent touching a contact point which is located after rotation of a predetermined rotation angle ± in the opposite direction from a contact point on the base circle of the work are set, the stylus is moved along a tangent when the right tooth flank is measured and moved along another tangent when the left tooth flank is measured, and the intersection of two tangents is set at the middle point between the measurement start position and the measurement end position.
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