The invention relates to an inserting
copper-aluminum
pipe welded joint and a method of fabrication thereof. A taper face of weld is arranged at the joint
welding position of a
copper pipe, and raised grains are arranged on the outer wall of an aluminum
pipe. During
welding, a mosaic block is arranged at the
welding position of the fixed
electrode; a groove is arranged in the mosaic block, and raised grains are prepared on the groove; and the nominal
diameter of the groove which bears raised grains is identical with the outer
diameter of the aluminum pipe. The aluminum fluid melted during welding can be filled in the raised grains of the groove of the mosaic block, so that the deformation of the aluminum pipe is avoided, and the quality and strength of the product are improved. By such welding method, the aluminum pipe can be clamped to avoid breaking off; in addition, the outer
diameter of the welding position of the
copper-aluminum pipe joint is kept identical with the outer diameter of the aluminum pipe.