Overturning device

The invention relates to the technical field of machining equipment, in particular to an overturning device. The overturning device comprises a mounting frame, and further comprises a material holdingtable mechanism, an overturning mechanism, a sliding base and a fixing plate which are mounted on the mounting frame. A sliding plate is driven by a first motor to move left and right on first sliding rails. Products are placed in material holding tables, the sliding plate is driven by the first motor to move to a designated position, the overturning mechanism stretches or retracts by the distance required by the products, meanwhile, an air cylinder drives the sliding plate to ascend and drives the material holding tables and the products on the material holding tables to ascend, to abut against calibration suction cups, and the products are sucked by the calibration suction cups; and the air cylinder drives the material holding tables to descend, third sliding rails of an overturning base of the overturning mech