Ring throwing machine plastic disc face shape detection method

The invention discloses a ring throwing machine plastic disc face shape detection method. The method comprises the following steps that 1, the straightness and absolute gradient error of a linear guide rail are detected; 2, the absolute gradient error of a plastic disc rotating shaft in a guide rail plane is detected; 3, the comprehensive error of the guide rail is calculated; 4, end jump of the plastic disc face is detected, and the plastic disc face angle is demarcated; 5, the contour shape of the plastic disc face in the radius direction is detected. The method can detect the plastic disc face shapes of ring throwing machines of any structures, and is easy and convenient to implement and high in precision.