Friction stir welding method based on photogrammetry

The invention discloses a friction stir welding method based on photogrammetry, and belongs to the field of friction stir welding. A device used for welding comprises friction stir welding equipment, photogrammetry equipment and a return light reflection mark point; and the photogrammetry equipment and the friction stir welding equipment are fixed, and the return light reflection mark point is pasted on a welded base metal. The specific welding method comprises the steps of equipment debugging, welding seam track determining, threshold value setting and welding. The device is simple and compact in structure, wide in plate thickness and plate width application range, high in clamping efficiency, low in cost, particularly suitable for track planning of irregular welding seams, height difference of base metal on the two sides of welding seams and other complex working conditions, and extremely high in adaptability to various welding base metal conditions and various friction stir welding devices. 本发明公开一种基于摄影测量的搅