Abstract: A new type of six-axis CNC drill grinding machine has been developed. The calculations required for converting the drill specifications into the proper position and motion parameters are carried out by a microcomputer. The control hardware and software inake the machine flexible, versatile and capable of grinding a variety of drill points with a high degree of accuracy and repeat ability. According to the mathematical models of twist and rnultifacet drills (MED'S), web thinning, multifacet drill and three point-drill grinding experiments have been conducted in this prototype machine. The experiments show that the design methodology and the new machine can be widely used for drill grinding in the field of manufacturing engineering. The machine has the potential to be used to grind other kinds of cutting tools.

Key words: drill grinding, drill model, grinder design, cmuluter control