| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a welding power source PS1 capable of cooling a base material to prevent a penetration bead from melting down without decreasing work efficiency. <P>SOLUTION: In a welding power source PS1 for penetration welding using a coated electrode 2, a welding current setting circuit IWR outputs a welding current setting signal Iwr and a low-level current setting circuit LWR outputs a low-level current setting signal Lwr which is composed of a high-speed pulse. A current setting conversion circuit SW outputs a low-level current setting signal Lwr while a conversion starting switch BS outputs a high-level signal and outputs the welding current setting signal Iwr while the conversion starting switch BS outputs a low-level signal as a current setting control signal Ir respectively. A power source main circuit PM supplies power based on the current setting control signal Ir between coated electrode 2 and a base material 4. Thus, work efficiency can be greatly improved and skill of welding operator is not required. <P>COPYRIGHT: (C)2013,JPO&INPIT |
