| 摘要 |
PURPOSE:To let the generated vapor escape from the gap and to obtain the weld product of high quality without defects of cavity, etc. by providing plural projections at intervals in the welding line direction close to the welding line on the overlapped faces of plural materials to be welded covered by a low melting point material. CONSTITUTION:A weld is performed by overlapping the materials 1, 2 to be welded which are coated by the low melting point material having the thickness t1, t2, by fixing with the clamper 14 having the step of the height H so as to make the gap 13 in the prescribed value G and a work table 15 and by irradiating a laser beam 7. Plural projections 16 extending in the right angles direction with the welding line are provided at intervals in the direction of the welding line by a press work, etc. on the material 1, 2 to be welded. With welding like this the vapor of the low melting point material coated on the material 1, 2 to be welded is escaped from the gap 13. The punch is therefore filled up completely by a molten metal together with the progress of weld because of the punch made by the laser beam on the material to be welded being made not in an irregular shape but in a sound shape. No cavity is therefore formed in the solidified metal and the weld product of high quality is obtd. |
