Quick-changing clamp special for detecting defects of circular grating

The invention relates to a quick-changing clamp special for detecting defects of a circular grating. The quick-changing clamp comprises a main clamp body and a precise adjusting gasket. The main clamp body comprises a clamping shaft, a support platform and a connection shaft from bottom to top. The clamping shaft is embedded with mini-type steel balls and mini-type compressed springs. The precise adjusting gasket is arranged on the support platform. According to the quick-changing clamp special for detecting the defects of the circular grating, a three-point positioning mode is adopted, the to-be-detected circular grating is made to make contact with the mini-type steel balls through the radial elasticity of the mini-type compressed springs, and micro positioning of the circular grating is achieved, so that the detection precision and efficiency of the surface defects of the circular grating are effectively improved. 本发明涉及一种圆光栅缺陷检测专用快换夹具，包括夹具主体和精密调整垫片。所述的夹具主体由下至上分别为：卡轴、托台和连接轴。所述卡轴内嵌有微型钢球和微型压簧。所述精密调整垫片置于托台上。所述