.... The forces in microdrilling can be modeled analytically using slip line theory for the cases of cutting with chip formation, and ploughing without chip formation. The model shows a good conformity with the experimental results for chip thicknesses around the minimum chip thickness, but the predicted...

...Bo-Wun Huang The dynamic characteristics of a microdrill in the drilling process were investigated in this study. The trend toward higher density printed circuit boards requires smaller holes, down to 0.3 mm in diameter, to be drilled through the board layers. To improve quality, produce a higher...