Robot joint sealing performance detection method and detection tool

The invention belongs to the technical field of industrial robot speed reducer assembly, and particularly relates to a robot joint sealing performance detection method and a detection tool. The method comprises the following steps that a speed reducer is installed on a large arm, the output end of the speed reducer is connected with a small arm through a plurality of speed reducer installation screws, and the connecting end face between the speed reducer and the small arm and the interiors of all screw holes are coated with sealant; a sealing detection tool is connected with the input end of the speed reducer; gas is introduced into a lubricating inner cavity of the speed reducer through an oil injection channel on the small arm for pressing; detecting the dwell time; when pressure maintaining is not qualified, soapy water is brushed to the heads, where screws are installed, of the multiple speed reducers, air leakage and bubbling points are leakage points, and technological treatment is conducted on the posi