レーザ穴あけ加工における初期溶融除去特性

概要

論文の詳細を見る
Laser drilling of metals is mainly performed by molten metal removal. Relationships between drilling characteristics and laser conditions have not been obtained both analytically and numerically. In the present paper, drilling characteristics in the initial stage are discussed on the basis that material is removed in the molten state. The calculation procedure is based on the finite difference method of heat conduction, which includes the thermal property dependence on the temperature and latent heat of fusion. Changes in hole depth and diameter with pulse duration time, pulse number in repeated drilling, beam radius, etc. were obtained for some beam conditions. The results show a similar tendency to experimental results. The calculation procedure described is useful for determining and predicting operation conditions in actual production lines.
Japan Foundry Engineering Societyの論文