- JAPAN INST METALS
Bowl, saddle and twist curved surfaces are typical basic shapes shown in several industrial products. In recent days, laser forming is studied to form curved plate of industrial products. In laser forming process, twist curved plate is produced with many parallel heating lines put on both surface at right angles. On the other hand, it is already known that final shapes of products with many heating lines vary because of its order of heating lines. In this report, progress of twisted shape forming was measured step by step after every one heating line in following two cases. In the first case, heating lines lying inner part of a plate were finished first. In second case, heating lines on outer side of a plate were carried out first. As a result, during early stage of whole heating lines, twist angle in the first case is larger than the second case. After that, increase of twist angle in the first case was dropped gradually. After completion of all heating lines, twist angle in the second case was larger than the first case.
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