Edge grinding device for sheet metal machining

The utility model discloses an edge polishing device for sheet metal processing, which comprises a base, a station frame is arranged above the base and connected with the base through a third support, a second air cylinder is arranged under the station frame, a shaft sleeve is sleeved at the piston end of the second air cylinder, and the shaft sleeve extends into the station frame and is provided with four top plates. A driving mechanism is arranged below the station frame and is in transmission connection with the shaft sleeve, a top frame is arranged over the station frame, a first support is arranged between the top frame and the base, a fixing plate is arranged between the top frame and the station frame, and a second gear is arranged on the bottom face of the fixing plate in a fixed-axis rotation mode. A fixing assembly is arranged on the bottom face of the second gear corresponding to the top plate, fourth supports arranged downwards are fixed to the left end and the right end of the bottom face of the