Ultrathin friction stir welding aluminum alloy liquid cooling plate

The utility model belongs to the technical field of liquid cooling plates, and particularly relates to an ultrathin friction stir welding aluminum alloy liquid cooling plate which comprises an installation box, a baffle is installed in the installation box, a liquid cooling plate body is installed at the upper end of the baffle, and the installation box, the baffle and the liquid cooling plate body are mutually connected through a buffer connecting mechanism. The buffer connecting mechanism comprises a connecting sleeve located in the mounting hole of the liquid cooling plate body, a plug pin penetrating through the connecting sleeve, a socket fixed in the mounting box and a middle spring located between the baffle and the liquid cooling plate body, and middle contact plates are fixed to the upper end and the lower end of the middle spring. Through the matched connecting sleeve, bolt and socket, the baffle plate and the liquid cooling plate body can be conveniently and quickly mounted and dismounted, and mean