In order to realize the visualization design of helical drill, a helical drill numerical modeling and simulation CAD system has been developed based on drill mathematical models. Characteristics of helical drill, such as chisel edge shape, cutting lip shape, lip clearance angle distribution along the cutting lip, heel clearance angle distribution around the drill flank, et al., can be predicted through the calculation and simulation of the system. Therefore, drill geometric parameters can be modified reasonably to achieve the optimization of helical drills by analyzing the predicted characteristics of helical drill. Furthermore, according to a specific set of helical drill geometric parameters, a unique set of grinding parameters can be obtained, which can be used to realize the manufacture of helical drills.

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