金属光造形複合加工法の開発 : 金属光造形法と切削仕上げのオンマシン複合化

概要

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The innovative system of milling-combined laser metal sintering is developed, combining a laser-assisted metal sintering and a milling process. In this process, the periphery of the sintered layers is machined by end mill in each several sintering steps. Smooth surface is obtained after the one process. Applying to the mold manufacturing process, it halved the lead time required in the conventional machining processes. To get the accurate dimensions and a smooth surface required to the injection mold in this method, relation between the energy density of the laser and the sintering surface density is evaluated. In the range of the energy densities bigger than 4.1J/mm^2, approximately 100 % density is obtained. Also, the milling condition of sintered body is decided by evaluating the relation between the surface roughness and cut volume per tooth. When processing a sample by the developed Milling-Combined Laser Metal Sintering system, dimensional accuracy of ±0.03 mm and the surface roughness of Rz20μm are obtained. And it confirmed that a mold manufacturing time is reduced by half than the conventional machining process when applying this process to the injection mold manufacturing.
社団法人精密工学会の論文
2007-08-05