The utility model relates to the technical field of die-
casting workpiece brightening, and discloses a die-
casting workpiece brightening mechanism which comprises a
machining box, a U-shaped transmission frame and a waved plate are arranged in the die-
casting workpiece brightening mechanism, a die-casting workpiece is poured into the
machining box, an output shaft of a motor drives a reciprocating lead screw to rotate, and the reciprocating lead screw drives the U-shaped transmission frame to reciprocate left and right; the U-shaped transmission frame drives the
machining box to reciprocate left and right, meanwhile, the machining box drives the transmission roller to reciprocate left and right, the transmission roller slides along the surface of the waved plate in the moving process, and at the moment, the transmission roller drives the machining box to circularly move front and back under limiting of the waved plate; at the moment, the
processing box circularly moves back and forth while reciprocating left and right, so that the die-casting workpiece placed in the
processing box can be fully vibrated, the die-casting workpiece immersed in the brightening liquid can fully and uniformly react with the brightening liquid, the overall brightening of the die-casting workpiece is more uniform, the defective rate is reduced, and the production efficiency is improved. And popularization and use are facilitated.