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1、在制造钢弧门的过程中,应很好重视焊接后构件变形的问题。第一次拼焊面板时因忽略了焊缝的收缩,内应力集中,引起反翘变形,变形值达到50～120毫米,增加了不小的处理工作量。实践证明,主梁焊接前的预弯曲值采用1.6％为宜。2、闸门组装时,腿架吊装对位,张口端的上、下翼缘板中心线必须调整到同一垂直线上,腿翼缘板前端头方能和固定门叶大梁底部的端承板焊接。第八孔钢弧门右侧上腿架上翼缘板没有预先做好这项检查工作,下翼缘就和端承板焊接,结果在焊接上翼缘板时发现翼缘板向右倾9厘米。为了使上翼缘复位,只好用千斤顶将翼板顶弯。最后虽然调整就位,但翼板内部已存在一定的内应力。为消除此内应力,曾在翼板后端割口,但外表上形成的弯曲状则无法校直。
1, in the process of manufacturing steel arc door, should be well attached to the deformation of the components after welding problems. The first time due to neglect the welding seam welding panel shrinkage, stress concentration, causing Alice deformation, deformation value reached 50 to 120 mm, an increase of no small handling workload. Practice has proved that the beam pre-bending pre-bending value of 1.6% is appropriate. 2, the gate assembly, the leg frame lifting alignment, Zhangkou end of the upper and lower flange plate centerline must be adjusted to the same vertical line, the front edge of the flange plate can be fixed and leaflet at the bottom of the end plate welding. Eighth hole steel door on the right side of the flange on the flange plate did not do a good job in this inspection, the lower flange and the end plate welded, the results of the flange plate welding the flange plate to the right 9 cm . In order to reset the upper flange, had to use the jack to bend the wing. Although the final adjustment in place, but the wing has a certain internal stress. In order to eliminate this internal stress, the blade was cut at the back of the wing, but the appearance of the curved shape can not be straightened.