Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
Space frame structure is divided into two types: bolt ball space frame and welding ball space frame, believe you all know what you’re aware of. If you are not sure, you can contact me via email:（safs139@safsteelstructure.com）, I will feedback to you once I see the message. Here let’s briefly introduce some basic characteristics of the welding ball space frame.
1.From the perspective of production quality: the welding ball structure uses hollow balls and welding pipes to be welding at the scene, the temperature and wind speed have a great influence on it. The blanking and welding are all manual. The blanking positioning and welding errors are large, the accuracy is low, and the welding seam is prone to clamps, Quality defects such as slag pores, low pass rate of secondary flaw detection, stress and deformation of welded pipe before and after welding, there is a hidden safety hazard, continuous release after use, the angle control of the rods is inaccurate, the rod is easily twisted, and the balance transmission is destroyed. Increase the deflection of the steel structure. It can not meet the engineering requirements of a row of curved surface and a large span, and the quality is difficult to guarantee, which has great limitations.
2.From the construction point: the welding ball space frame construction site requirement are relatively high, and the site needs to be as open and flat as possible, which is conducive to the assembly of the space frame on the ground and can ensure the quality of the space frame assembly.The large amount of on-site welding requires high requirements on welding personnel. As a whole, the construction period is long, which affects the operation and production in the filed.
3.Observe from the welding point: the on-site manual welding has relatively large influencing factors and cannot guarantee weld flaw detection, thus affecting the quality.
4.From the installation steps:the on-site welding ball installation process is complicated, according to the drawing → tooling line →angle measurement →positioning spot welding → full welding → cleaningand testing welds. The daily construction is 80-150 ㎡, all steel pipes are butt welded, and the workload is relatively large.
5.From the perspective of rust-removal: the space frame steel pipe and welds are manually derusted on site, and then painting, the welds are easily to rust. Phased rust removal and paint maintenance are required to increase the later use cost.
