The dependence of qualitative and quantitative parameters treatment of holes on printed circuit boards by the choice of foil laminated fiberglass and cutting modes

The paper under discussion covers the area of qualitative and quantitative parameters of holes' treatment on the printed circuit boards depending on the choice of optimum factors and cutting modes, shows the relative “stability” drills (in terms of their quantity). As the title implies the article describes the main factors affecting the quality and productivity when drilling plates with the high density of drawing. It is spoken in detail the technique of the choice of optimum cutting conditions (depth of cutting, feed and cutting speed), which depend on productivity, quality, durability of cutting tools and the cost of producing printed circuit boards. The description of the foil laminated fiberglass is given, as the base material for the manufacturing of printed circuit boards, providing the automation of assembly works and increasing the number of constructional and operating features of products. The article is rather actual, because it focuses on the processing of heterogeneous composite material having a high abrasive effect of the fiberglass. Much attention is given to the main characteristics of composite material, the specifics of its mechanical treatment and arising with these difficulties, common mistakes, which can lead to mass faults in the production of printed circuit boards on the plants. Conducted by authors experiments prove that the relative “stability” of drills (in terms of number drills) can be increased, compared to the reference data up to 14 times, using the optimal estimate and experimental cutting modes and fiberglass material. The article contains four tables with the necessary explanatory photo-graphic images, illustrating tools' wear and the presence of burrs on the material at the opening's exit.