Aluminum alloy friction welding device

The invention provides an aluminum alloy friction welding device. The device comprises an aluminum alloy clamp, wherein the aluminum alloy clamp comprises a base and a compression mechanism; the compression mechanism comprises a support, a compression plate, an air cylinder, an auxiliary pressing plate and a limiting mechanism; the support is longitudinally fixed on the base; the compression plateis parallel to the base; the middle part of the compression plate swings on the support through a transversely arranged first rotation shaft; the air cylinder is arranged on the base; a piston rod ofthe air cylinder is connected with one end of the compression plate; the auxiliary pressing plate is arranged at the other end of the compression plate relative to the air cylinder; the auxiliary pressing plate rotates on the compression plate through a second rotation shaft parallel to the first rotation shaft; the auxiliary pressing plate is capable of making contact with the upper surface of ato-be-welded workpiece; an