Method for solving APM roof welding recess

The invention discloses a method for solving an APM roof welding recess. The method comprises the steps: cleaning a to-be-welded groove of a roof profile, and carrying out mechanical grinding and cleaning; assembling the roof profile on a tool, and controlling the assembling gap, the misalignment, and clamping the tool, specifically, the assembling gap of the roof profile is set to be 0-0.5 mm; selecting a stirring head for roof welding, and welding according to parameters, specifically, the pressing amount of the stirring head is 0.1-0.2 mm; and placing the welded roof profile on the tool, and keeping a clamping state for 4-5 hours. According to the technological method, the technology for solving the APM roof welding recess is determined, the surface welding recess of a roof welded based on the technological parameters can meet the standard requirements, powerful guarantee is provided for batch production of roofs, and the risks that products are unqualified and scrapped are reduced. 本发明公开了一种解决APM车顶焊接凹陷的方法，