Laser cladding hydraulic cylinder defect automatic diagnosis and repair equipment and repair method

The invention discloses a hydraulic cylinder defect diagnosis and repair device based on a laser cladding technology and a use method. Firstly, the hydraulic cylinder is cleaned through cleaning equipment, impurities are removed, after drying treatment is conducted, the cleaned hydraulic cylinder is installed on a clamping device, comprehensive detection is conducted on the hydraulic cylinder through nondestructive testing and ultrasonic waves, and defect information is obtained. And then, the upper computer analyzes and programs the defect information to generate a repair track of the laser cladding head, and controls the laser cladding mechanism to repair the defect after confirming that the repair track is safe. And after repairing is completed, ultrasonic waves are used again for detecting the hydraulic cylinder, and comprehensive performance evaluation is conducted on the repaired hydraulic cylinder so that it can be ensured that the hydraulic cylinder meets the use requirement. The hydraulic cylinder de