Fabrication Method of Curved Surface of Gem with Self-milling

摘要

PURPOSE: A processing method for a curved surface on jewelry with self-polishing is provided to prevent incline of yield rate in symmetric surface processing by processing jewelry on a curved shape. CONSTITUTION: A processing method for a curved surface on jewelry with self-polishing includes a stage to cut jewelry to several plane shapes and a stage to make cut jewelry move with vibration and rotation after mixing cut jewelry with an abrasive and an abrasive ball. The abrasive is one of chromium oxide, aluminum oxide and cesium oxide. The abrasive ball is from 5 to 10 millimeters in diameter. The abrasive ball is composed of Si3 and N4 or Al2 and ozone(O3). A cam shaft(2) generates eccentricity. A vibration condition of the cam shaft is from 30 to 300 hertz. Thereby, raw ore is processed in a curved surface and roughness of surface of jewelry is from -1 to 1 micrometer.