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Bi-directional polishing machine is to make use of the moving extrusion of the upper and lower oil pressure cylinders to make the soft abrasive flow through the machining surface, the inner hole or the end angle, and to process the burr, chamfering and polishing grinding, and the mirror surface is processed with the reciprocating motion.
This processing is the most suitable method for the the complex shape which usual cutting tools can not work, such as the concave and convex surface and the bend pass. is the most suitable processing method. especially mirror polishing in the guide pipe of the gas liquid, which grinding marks consistent in the direction of the flow. It can effectively improve the performance, quality and gloss of the mold or work piece to reach the mirror level, and prolong the service life.The surface roughness after polishing can reach Ra0.025-Ra0.04μm.