| 摘要 |
PURPOSE:To prevent time lapsed rusting at succeeding stage and induced corro sion and to improve the reliability in product accuracy by forming a shielding film prior to stud welding, generating a pilot arc by mechanically removing at the welding time and thereafter effecting main welding. CONSTITUTION:A vapor flux 9 is blown off from a nozzle 8 in the state of approaching to specific weld zone the stud 4 which is clamping a welding gun 1 by approaching to a work 5 and is coated in the state of not being scattered from the weld zone to form a shielding film 9. The welding gun 1 is thereafter descended, the stud 4 is pressed to the work 5, its tip is pressed to the welding face 6 on the upper face of the work 5 and the shielding film 9 of the vapor flux on the weld zone upper face is mechanically removed once by pushing it off to the circumference thereby. A pilot arc 10 is then generated prior to the shielding film 9 approaching by concentrating again to break through the shielding film 9 secondarily and a main arc 11 is generated by pressing the stud 4 to the welding face of the work 5 to effect stud welding.
|
