Energy Consumption of the Brushing Process for PCB Manufacturing Based on a Friction Model

摘要

Industries are now required to use 'green' manufacturing due to emerging environmental concerns. In this study, the de-burring process for printed circuit board manufacturing was analyzed, and its energy consumption was examined based on a friction model. For de-burring of drilled micro-vias, a mechanical brushing process is typically used due to its performance and cost-effectiveness. However, it is very complex to analyze the energy consumption of a brushing process because a brush simply sweeps the surface with rotating metal wires, unlike conventional cutting processes To construct an energy consumption model of a brushing process, its energy consumption was examined empirically considering a friction model The brush was assumed to be an elastic body, and velocity strengthening and weakening of the friction coefficients were predicted Experiments were performed to match the data, and the energy consumption model was validated. The power consumption of the brushing process showed a concave shape with respect to the rotational speed, and the overall power could be reduced by up to 40% by controlling the process parameters. The process parameters for the minimum energy consumption could be derived using the model considering local constraints such as burr height.