| 摘要 |
PURPOSE:To reduce the time for changing over the welding in corner parts to welding in a straight part by placing the 1st welding rod enclosing the corner parts of the 2nd member on the 1st member and binding the 2nd welding rod to the rear end of the 1st welding rod. CONSTITUTION:The 2nd member 2 is placed on the prescribed point of the 1st member 1 and thereafter the 1st welding rod 3 is placed on the 1st member 1 to enclose the 1st and 2nd corner parts R1, R2 of the 2nd member 2. The 2nd welding rod 8 is gripped to the holder of a welding machine and thereafter the front end 9 of the 2nd welding rod 8 is connected to the rear end 4 of the rod 3. Electricity is conducted to a welding power source and the cabtype cord of the welding machine and the coating material 6 at the end of the rod 3 is stripped to generate an arc. Then welding is started from the top end of the rod 3 and welding progresses successively. When the welding progresses to the rear end 4, the welding by the 2nd welding rod 8 is automatically started. When the welding progresses further to a curved part 8a, the rod 8 moves automatically in the direction of an arrow B and welding of the straight part S is automatically executed. |
