| 摘要 |
PURPOSE: To provide a cutting method for a spiral bevel gear, capable of forming the depth of cut in only such a part as a toe-side end and a heel-side end of both convex and concave tooth surfaces. CONSTITUTION: In an interval ranging from a cutting start point 1 of a concave tooth surface heel-side end H2 to an end point 2, a work turning phase angle is delayed to a cutter turning phase angle, and a recess is formed in the end H2 with the depth of cut by a blade B2-1. In an interval ranging from the cutting start point 3 of the concave tooth surface toe-side end T2 to the end point 4, the work turning phase angle is restored to the original one, and a recess is formed in the end T2 with the depth of cut by a blade B2-2. In an interval ranging from the cutting start point 5 of a convex tooth surface heel- side end H1 to the end point 6, the work turning phase angle is advanced to the cutter turning phase angle, and in an interval ranging from the cutting start point 7 of the convex tooth surface toe-side end T1 to the end point 8, the work turning phase angle≃2 is restored to the original one, and a recess is formed in the end T1 with the depth of cut by the blades B1-1 and B1-2.
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