An Analytical Study of Three Point Grinding Methods for General Purpose Twist Drills

Modeling of twist drills wear by a temperature-dependent friction law

“…The shape of a standard twist drill is characterized by the symmetry around its axis, and the type of sharpening. The three most frequently used sharpening types for twist drills are described in the work of Armarego and Wright (1980). They are defined by geometrical parameters that depend on the cutting geometry of the two active parts of the twist drill, the cutting lips and the chisel edge.…”

“…A theoretical and predictive model should provide information about cutting conditions to be used in any experimental measurements. Our proposed model which takes the whole cutting edge into account was inspired by the previously mentioned works (Elhachimi et al, 1999;Gong and Ehmann, 1999;Gong et al, 2005;Moufki et al, 2004;Armarego and Wright, 1980). At each cutting point M, the cutting depth is obtained in terms of the feed speed f and the cutting geometry.…”

“…These parameters are determined by the shear zone model in oblique cutting (Armarego and Wright, 1980). Each parameter is a linear or non linear function of radius, r, and the distance from the cutting point to the drill axis.…”

“…At each cutting point, the oblique cutting model is applied. The details of the drilling model are given in (Armarego and Wright, 1980) and the thrust of the two cutting lips is equivalent to…”

FBF-NN-based modelling of cylindrical plunge grinding process using a GA

“…Several efforts were made by various researchers to design a suitable model for grinding process such as, using parameter optimisations [8,17], analytical and numerical approaches [1,12], neural networks (NNs) approach ( [7,15,18]), etc. Furthermore, intelligent approaches were also adopted by many researchers to optimise the grinding process condition [5,13,14].…”