Provided is a technique that enables appropriate speed adjustment in a speed-adjusted section and inhibition of burring and tool damage without unduly extending cycle time. A speed adjustment device according to the present invention is provided with: a storage unit that stores a calculation method for an adjusted speed of a driving axis in a speed-adjusted section, the adjusted speed being determined in accordance with a tool being used, the shape of a workpiece in the speed-adjusted section, and path information; a speed-adjusted section identification unit that identifies the speed-adjusted section and the shape of the workpiece in the speed-adjusted section on the basis of shape data of the workpiece and the path information; and an adjusted speed calculation unit that determines the calculation method for the adjusted speed of the driving axis in the speed-adjusted section on the basis of tool data, the shape of the workpiece in the identified speed-adjusted section, the path information, and stored information that is stored in the storage unit, and calculates the adjusted speed in the speed-adjusted section on the basis of the determined calculation method.

Provided is a technique that enables appropriate speed adjustment in a speed-adjusted section and inhibition of burring and tool damage without unduly extending cycle time. A speed adjustment device according to the present invention is provided with: a storage unit that stores a calculation method for an adjusted speed of a driving axis in a speed-adjusted section, the adjusted speed being determined in accordance with a tool being used, the shape of a workpiece in the speed-adjusted section, and path information; a speed-adjusted section identification unit that identifies the speed-adjusted section and the shape of the workpiece in the speed-adjusted section on the basis of shape data of the workpiece and the path information; and an adjusted speed calculation unit that determines the calculation method for the adjusted speed of the driving axis in the speed-adjusted section on the basis of tool data, the shape of the workpiece in the identified speed-adjusted section, the path information, and stored information that is stored in the storage unit, and calculates the adjusted speed in the speed-adjusted section on the basis of the determined calculation method.