Flatness detection equipment for disc workpiece

The invention discloses flatness detection equipment for a disc workpiece. The flatness detection equipment comprises a workpiece positioning device, a workpiece rotating device and a laser detection device. The workpiece positioning device is composed of an air cylinder, a positioning clamping plate and the like, when the workpiece moves to the detection device, the air cylinder drives the clamping plate to move towards the middle, the workpiece is positioned, and follow-up detection is facilitated. The workpiece rotating device is powered by a motor and a speed reducer, a motor shaft is connected with a three-jaw air cylinder and three half shafts, and the three-jaw air cylinder is opened after being inflated to drive the half shafts to clamp a workpiece to rotate. The laser detection device is composed of a laser displacement sensor and the like, when the workpiece begins to rotate, the laser detection device is driven by the stepping motor to rotate, the surface of the workpiece is detected, the detection