Method for removing insulating coating of electric cable and apparatus therefor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkaru Usui, Hiroshi Tsukahara
Life of this patent
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Abstract
An insulating coating of a desired portion of an electric cable is removed by selectively irradiating the desired portion with a pulse laser beam having a pulse width of 5.mu. sec or less and a peak output of 1 MW or more.
Claims19
A method of removing insulating coating of an electric cable, comprising the step of irradiating said electric cable with a laser beam pulse having a small pulse width and a large peak output, wherein said pulse width is 1 to 2 .mu.sec and said peak output is 15 MW.
A method of removing insulating coating of an electric cable, comprising the step of irradiating said electric cable with a laser beam pulse having a small pulse width and a large peak output, wherein said electric cable is a flat cable having a plurality of conductors each having an insulating coating, wherein said insulating coating is of vinyl, and wherein a diameter of each said conductor having said insulating coating is 1 mm or smaller and a diameter of said conductor is 500 .mu.m or smaller.
An apparatus for removing an insulating coating of an electric cable, comprising:
- a laser oscillator for generating a pulse laser beam having a short pulse width and a large peak output;
- cylindrical lens means for guiding said pulse laser beam from said laser oscillator onto said electric cable;
- and
- means for putting said electric cable in a deoxidized atmosphere so that a removal of said insulating coating is performed in the deoxidized atmosphere.
An apparatus for removing an insulating coating of an electric cable comprising a laser oscillator, first condenser lens means disposed on a first optical path for condensing an output laser beam from said laser oscillator into a condensed laser beam having a rectangular cross;
- section and directing said condensed laser beam onto a first side of said electric cable, first lens shift means for shifting said first condenser lens means along said first optical path of said laser beam, and cable positioning means having a first window corresponding in shape and size to a predetermined area of said electric cable, said insulating coating in said predetermined area to be removed, said cable positioning means being positioned in an area of said electric cable to be irradiated with said laser beam.
Dependencies are inferred from the claim text.