アーク放電を用いた溶融金属積層による傾斜壁の造形 : 積層形状に及ぼす諸因子とその影響(<小特集>生産加工・工作機械の規範2008)

概要

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A direct metal rapid fabrication process using an arc welding is developed. This methodology is based on the layer manufacturing process of the molten metals supplied by the arc discharge. In this report, it is shown that the overhanging shape consisted of the inclined wall can be fabricated by the proposed process. Then some causes which degrade the shape accuracy of the fabricated inclined wall are investigated. Firstly, the inclination angle becomes larger than the intended angle because the molten metel distributes downward because of the gravity and the arc force. Secondly, at the initial stage of the accumulation, the wall inclination angle tends to be small because the arc point location shifts upward on the previously formed bead. Thirdly, the heat capacity and temperature around the accumulating point largely affect the accuracy of the inclination angle.
2009-09-25