船舶焊接生产基础 (27).pdf

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1、Carbon dioxide gas shielded flat welding Learning objectives Master the technical requirements and operation technology of CO2 gas shielded welding plate butt vertical welding 1 2 3 Learn about the characteristics of CO2 gas shielded welding plate butt vertical welding Learn to develop a welding sch

2、eme for CO2 gas shielded welding plate butt vertical welding,and be able to correctly select welding parameters Solder tumors Vertical welding is perpendicular to the horizontal surface of welding,molten liquid metal and slag by gravity is easy to flow down and produce weld tumors,bite edges,burn-th

3、rough and other defects,so that the weld is beautiful,and even affect the quality of the weld.Tasks are proposed Bite the edges Burn through Welding defects Welding operations 01 Play the bottom layer for welding 02 Filler layer welding 03 Cover layer welding 01 Small current,short circuit transition welding 02 The serrated shape of the welding torch oscillates evenly 03 Ceramic padding is added to the back of the weld 04 Pay attention to the angle of the welding torch for each weld bead Carbon dioxide gas shielded flat welding Tips and tricks Thanks for watching