Fabrication of Polycrystalline Diamond Wheels by Wire-EDM

• Main Authors: Jia-Ran Li, 李家然
• Other Authors: Mu-Tian Yan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/79223294742481200059

碩士 === 華梵大學 === 機電工程學系 === 102 === This paper presents the application of wire electrical discharge machining (Wire-EDM) for profile roughing and final dressing of polycrystalline diamond (PCD) wheels. A rotary spindle has been integrated with a prototype micro wire-EDM machine to achieve high machining accuracy and surface quality for the cutting edge of PCD wheels. In comparison with standard wire-EDM, micro wire-EDM could achieve better surface quality and smaller thermal damaged layer for the fabrication of PCD wheels. A grinding-edge thickness of 3 m could be sharpened by micro wire-EDM compared with an edge-thickness of 6 m for standard wire-EDM. The PCD wheels manufactured by micro wire-EDM have been applied to a scribing machine for scribing of LCD glass substrates. The fabricated PCD wheel could enable the scribing process to obtain a median crack depth of 150 m compared with that of 170 m by a commercial PCD wheel. Experimental results have verified the applicability of micro wire-EDM for the fabrication of PCD wheels.