Defect detection equipment and detection method for sealing ring

The sealing ring defect detection equipment comprises a device frame, a transshipment visual positioning device is arranged on one side of one end of the front face of the device frame, and a mechanical arm is arranged in the middle of one side of the transshipment visual positioning device. An undetected material return port is formed in one end of the back face of the transfer visual positioning device, a size detection assembly is arranged at one end of the back face, close to one side of the mechanical arm, of the transfer visual positioning device, and an appearance detection assembly is arranged in the middle of one end of the front face in the device frame; a feeding platform device is arranged at the bottom of the interior of the device frame. According to the invention, the size detection device is arranged in front, so that the influence on the subsequent size detection precision due to material stretching during appearance detection is eliminated, a turning plate mechanism and a pneumatic driving e