| 摘要 |
PURPOSE: A torch head for welding is provided to decrease a speed heating a nozzle and increase a speed cooling the nozzle by increasing a surface area by a radiation protrusion and a radiation plate of the nozzle, thereby reducing temperature of the nozzle heated by an arc when welding. CONSTITUTION: A torch head for welding comprises a diffuser(300), a welding tip(400), an insulator(500), and a nozzle(600). The welding tip is joined to a front end portion of a diffuser body of the diffuser and includes a wire transferring hole in an inner central portion. The center of the insulator is penetrated. The insulator includes a plurality of joining protrusions(510), thereby being joined to an outer side of a rear end portion of the diffuser body. An insertion hole where the diffuser and the welding tip are inserted is formed in an inner central portion of a nozzle body(610). A plurality of joining grooves(630) is formed in a cooling unit(640) of the nozzle so that protection gas is intensively discharged through a gas discharging hole(330) of the diffuser toward the welding tip.
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