| 摘要 |
<p>A thin, wide hollow panel in good shape (1) is provided by extrusion through a die (24) designed for each of the entry ports (30a) and the merging space (31a) to have characteristic design values such that the hollow panel (1) has a relative error (”µ) within ±10% between the average value of strain (µi) in all regions (1b) in the welded parts (1a) and the individual values of strain (µi) in each region (1b) in the welded parts (1b).</p> |
