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In this study, drilled PWB is a type of glass/epoxy-resin GFRP, plain woven cloth, and thickness 1.6 mm (8 plies). This workpiece is the copper clad laminate. In experiments, the drills are the diameters of 0.4-5.0 mm. The holes are drilled under drilling conditions of spindle speeds of 20000-80000 rpm and feed rates of 10-50 μm/rev. An amount of 30000 holes are drilled. The investigation is carried...
This study describes the relation between the cutting force and the surface roughness of a drilled hole wall in small-diameter drilling of GFRP for a printed wiring board. In order to investigate the characteristics of small diameter drilling for GFRP, the surface of the drilled hole wall is observed by SEM, and the surface roughness along the feed direction is measured at various edge position angles...
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