Grinding device for metal piece

The utility model relates to the technical field of grinding devices, in particular to a metal piece grinding device which is used for machining a metal comb and comprises a base, a clamp assembly and a grinding assembly, the clamp assembly comprises a clamping table and a linear driving device, the clamping table is arranged on the base in a sliding mode, and the metal comb is placed on the clamping table; the linear driving device is arranged on the base and connected with the clamping table, the grinding assembly comprises a grinding table, a rotary driving device and a lifting driving device, first abrasive paper for accurate grinding and second abrasive paper for rough grinding are arranged on the two faces of the grinding table, the mesh number of the first abrasive paper is larger than that of the second abrasive paper, and the grinding table is connected with a rotating shaft of the rotary driving device. According to the utility model, the grinding table is rotated through the rotary driving device,