| 摘要 |
PURPOSE:To assure machining accuracy and to shorten machining time by providing the first control device which moves a irradiation point in relation to an object to be machined and the second control device which calculates the relative moving speed according to the radius of curveture of a graphic. CONSTITUTION:The first control device 8 delivers to a work station 7 a move command to perform the machining at specified speed according to the graphic to be followed as well as the laser beam irradiation start and stop commands to a oscillator 1. The second control device 9 operates the relative speed of the laser beam irradiation point 6 and the object 5 to be machined based on the time constant tau of a driving system and the radius of curveture (r) of the graphic. The relative speed here is the function of the time constant tau and the radius of curveture (r), that is, alphatau<-n>r<m> based on which arithmetic is made in the control device 9, giving the maximum speed within the range necessary accuracy is assured. Thus, the time required for cutting work can be shortened while necessary machining accuracy is assured. |
