| 摘要 |
PURPOSE:To simply weld in a low cost and high efficiency by roll pressing the flat part of specific range from the boundary of weld zone in parallel with weld zone. CONSTITUTION:In the fillet welded joint 11 to combine a flat sheet 1 and longitudinal frame materials 7, 7' of aluminum or its alloy, a flat sheet part 1 in a range of 50mm from the boundary 2 of weld zone is pressed in parallel with the weld zone by non-symmetrical rolls 4, 5. By this method, welding in simple way, low cost, high efficiency is made possible, also, reduction of a man-hour/ term of building of ship, etc., is made possible, leading to cost down. Here, a kind of aluminum and aluminum alloy, for example, is desirably a pure Al group, Al-Mg group, Al-Mg-Si group, etc. A sheet thickness of flat sheet 1, longitudinal frame material 7, 7' and horizontal frame material is desirably 1-1.5mm. Also, a direction of roll pressing is normally vertical to the flat sheet 1 and in parallel with the weld line, a width of pressing/stretching is desirably normal 5-30mm. |
