Method for closing laser welded seam of auto transmission gear

The invention relates to a method for closing a laser welded seam of an auto transmission gear, which comprises the following steps: selecting laser welding time as control parameters, dividing the time into five time sections according to the states of a welded seam initial section, a welded seam middle section and a welded seam tail section, mainly controlling the time parameters of the welded seam initial section and the welded seam middle section, forming final time control parameters in combination with the laser welding time obtained according to the welded joint diameter and the welding speed calculation, thereby forming the laser welded seam of the auto transmission gear that has good closing performance to reduce or avoid the closing defect of the laser welded seam of the auto transmission gear and meet the strength requirements of the laser welded seam. Meanwhile, the method is favor of reducing the welding deformation of a gear assembly and improving the service performance of the gear assembly.