Abstract: A new polycrystalline diamond compacts cutter which replaces the abrasives in a grinding wheel or the inserts in a cutting tool with PDC fibers is prepared. The new PDC cutter has fibers that are artificially ordered so as to have the desired geometric angles and edge space among themselves, and it has a larger number of the cutting edges than the conventional cutting tools. And further compares the machining performance of the PDC cutter with the diamond grinding wheel in machining the WC/12Co coating. The experimental results indicate that the quality of the machined work-piece surface is equal to that machined by diamond grinding wheel, and the high machining efficiency can been achieved by increasing cutting parameters. The wear test indicate that the PDC cutter exhibits pits and slight abrasive wear due to the concussion with the work-pieces in the process of cutting, the cutting edge of the PDC cutter appears tipping, and it need to be sharpened again.

Key words: Cutting force, Polycrystalline diamond compacts cutter, Roughness, Surface-quality, WC/12Co coating, Wear mechanism