| 摘要 |
A welding device for manufacturing a fire door is provided to improve efficiency of manufacturing a fire door by arranging plural cylinders and installing electrode plates at the ends of piston rods without making welding trace on the surface of a fire door. The welding device for manufacturing a fire door includes a frame(20), plural first cylinders(23), plural electrode plates(24) and a rectangular table(26). Plural first cylinders(23) are arranged on a head(21) of the frame to have a predetermined space between each other and comprise a piston rod(23a). The plural electrode plates(24) are installed at the end of the piston rod(23a). A welding power is connected to the electrode plate(24) to make spot welding of a reinforcing member between a front plate and a rear plate.
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