Gas protection device for stirring friction welding

The utility model provides a gas protection device for stirring friction welding. The protection device comprises a protective cover body. A fixing ring is connected with the protective cover body through a connecting rod. The protective cover body is provided with an intake tube. The protective cover body is a revolving body cavity. The bottom of the revolving body is a slope. A plurality of through holes are evenly formed in the slope and the inner cylindrical surface of the upper protective cover body. The gas protection device for the stirring friction welding has the advantages of being simple, practical, convenient to operate, particularly suitable for the weld surface cooling of the thick plate aluminum alloy stirring friction welding and suitable for the gas protection of a high melting point metal in the process of stirring friction welding, wherein the high melting point metal includes the copper alloy, the titanium alloy and the like. Meanwhile, the device can cool the stirring head, thereby prolon