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    • 37. 发明专利
    • PLASMA CUTTING DEVICE
    • JPH03294068A
    • 1991-12-25
    • JP9516390
    • 1990-04-12
    • MATSUSHITA ELECTRIC IND CO LTD
    • TAKAGI SEIJI
    • B23K10/00
    • PURPOSE:To prevent the cutting work environment from being contaminated by dust generated at the time of cutting by providing additionally a dust collecting nozzle and a dust collector in the periphery of a torch of a plasma cutting device provided with a sequence controller for controlling the operation of a plasma generating power source and a gas supply part. CONSTITUTION:At the time of cutting a metallic material 11 to be worked by a torch consisting of an electrode 5 and a cutting chip 6, gas is fed between the electrode 5 and the cutting chip 6 through a gas hose 12 from a gas supply part 2 by turning on a switch 14 of a sequence controller 3, and also, a plasma arc Q is generated between the electrode 5 and the metallic material 11 by a plasma generating current from a power source 1 and the metallic material 11 is cut. In this case, dust generated at the time of cutting from a gap part P between a cylindrical dust collecting nozzle 7, provided concentrically with the electrode 5 and the cutting chip 6, and the cutting chip 6 is caught to a dust collector 4 by a hose 13, therefore, the cutting work environment is not contaminated by dust.