| 摘要 |
PURPOSE:To cut an extra-thick object by measuring a distance to the surface of an object to be cut, a difference of a reflection factor caused by a material of a cross section, and depth of the cross section, and controlling a laser condensing lens system. CONSTITUTION:In a laser cutting device constituted of a laser oscillator 1, a partial reflecting mirror 6 and a condensing lens 4, an incident light detected by a detector 9 through the partial reflecting mirror 6, and a reflected light of a laser by an object cutting part detected by a detector 19 are inputted to a data processor 10, a reflection factor is derived, and depth of the cutting part is detected. Also, a position of the surface of an object to be cut is detected by an ultrasonic probe 7 by an ultrasonic measuring instrument 8, and a lens system controller inputs an output of the ultrasonic measuring instrument 8 and an output of the data processor 10 and outputs a focus feeding speed signal to the condensing lens system 4. In such a way, an extra-thick object is cut by laser light whose energy density is the highest. |
