柳州会展中心双目型箱型钢柱制作技术

MANUFACTURING TECHNIQUE OF DOUBLE 目 AND BOX STEEL COLUMNS IN LIUZHOU CONVENTION CENTER

双目型钢柱内部纵隔板、横隔板较多,结构复杂、焊缝多、焊接困难。在制作时,从材料排版、下料、组装、焊接及预拼装等各个工序进行严格控制,以保证制作质量。其中箱型柱的组装和焊接是保证制作质量的关键。箱型柱内部零部件组装与焊接应交替进行,组装完毕后严格按照焊接工艺的要求进行施焊。采用对称焊、多层多道焊及分段跳焊等焊接工艺,在满足焊接要求的前提下尽量采用较小电流焊接,从而将焊接变形控制到最小。各分段箱型钢柱制作完毕后,在拼装平台进行整体预拼装,然后对箱型柱整体尺寸进行复查,对超标部位进行火焰校正。经过对所有箱型柱预拼装几何尺寸和水平度检查,箱型制作质量符合设计及规范要求。

It is very difficult to weld a double 目steel column due to the fact that there are many longitudinal and diaphragms inside the steel column;the column structure is complicated and having lots of welded joints.Its making quality can be ensured only by strict control of each workstage from composing type and issuing materials to assembly,welding and testing assembly during the manufacture.The assembly and welding are the key to ensuring column＇s making quality.The assembly and welding of inner parts of box column should be done alternately.It should be strictly to weld in accordance with the requirements of welding technology after assembly.According to the welding sequence,technology of balanced welding,multi layer and multi-pass welding,wandering sequence etc should be used.Under the condition of meeting the needs of welding,the smaller electric current should be used to weld,let the welding deformation be controled to the lowest level.When each section of the box column is finished,an overall assembling is done on the assembly platform and then the overall dimensions of box column are rechecked,flame correction is used for the parts that can not meet the standard.After inspecting all the assenbling dimensions and levels of box column,the box column manufacture quality can meet the requirements of design and standard.