| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser-arc composite welding head, welding equipment and a nozzle with which a condensed laser beam and an arc are easily made coaxial and a stable welding bead is formed independent of the welding direction (eliminating the dependability on the welding direction). SOLUTION: A nozzle 16 provided at the end of a laser-arc composite welding head has the form of a slender inversed cone, the diameter of a nozzle exit 16a is made close to the diameter of the condensed laser beam 14a as much as the inner face 16b of the nozzle does not interfere with the condensed laser beam 14a, a TIG electrode 18 for an arc discharge is provided in the nozzle 16, the flow of the arc 21 discharged at the TIG electrode 18 is guided by the inner face 16a of the nozzle and the arc 21 ejected from the exit 16a of the nozzle is made coaxial with the condensed laser beam 14a ejected from the exit 16a of the nozzle.</p> |
