Polishing device for tubular cooling fin machining

A polishing device for tubular cooling fin machining comprises a fixed plate, a first groove is formed in the upper end of the fixed plate, a limiting groove is formed in the first groove, movable plates are inserted into the limiting groove, rolling wheels are evenly arranged on the bottom sides of the movable plates, a limiting rod is fixedly connected between the two movable plates, and the limiting rod is sleeved with a clamping plate. A limiting clamping groove is formed in one side of each clamping plate, a two-way screw is rotationally connected into each limiting clamping groove, clamping plates are connected to the two sides of each two-way screw in a threaded mode, rubber blocks are connected to the opposite sides of the two clamping plates in a glued mode, and the two clamping plates are driven to be close to each other by adjusting the screws to be matched with the clamping plates to clamp the cooling fins. The clamping stability can be improved through the rubber blocks, and the problem that the