PROBLEM TO BE SOLVED: To provide a gear shaping machine that reduces machining time and improves machining accuracy.;SOLUTION: The gear shaping machine 1 performs gear cutting on a workpiece W by rotating a cutter 13 and the workpiece W in an engaged state. The machine includes: a spindle 12 to which the cutter 13 is detachably attached; a cutter head 10 supporting the spindle 12 so as to be moved in a vertical direction and rotated around a shaft center thereof, and a cutter 13 swingably so as to approach and separate from the workpiece W and movably in a cutting direction to the workpiece W; and a servo motor 14 for moving the spindle 12 in the vertical direction. A cutting speed of the cutter 13 is set for each cutting position. When the cutting speed is changed, time constants of the cutting speed are changed to keep constant acceleration of the cutter 13.;COPYRIGHT: (C)2013,JPO&INPIT
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