Angle-adjustable semicircular workpiece clamping device

The utility model discloses an angle-adjustable semicircular workpiece clamping device. The angle-adjustable semicircular workpiece clamping device comprises an adjusting unit and a clamping unit, the adjusting unit comprises a base, an adjusting ring and a positioning block; a groove is formed in the base and is of a semicircular structure. Lifting hooks are arranged at the two ends of the base respectively, so that a lifting device is connected with the lifting hooks to lift the base; the adjusting ring is arranged in the groove and can rotate around the central axis of the groove; the workpiece is fixedly placed in the adjusting ring; a plurality of positioning grooves are formed in the outer circle of the adjusting ring; the positioning block is fixedly connected with the base, and the positioning block is used for being inserted into one of the positioning grooves to fix the adjusting ring in the groove. By means of the device, the angle of the workpiece can be adjusted in real time, the workpiece can be