How to choose the raw materials of grid structure

The key parts of the grid structure are seamless steel pipe, high-strength bolt, bearing steel ball, cone head, plain nut, rubber bearing, support and connecting parts. The quality of each part of raw materials is very important for the reliability of grid structure.

How to choose the raw materials of grid structure
   1. Seamless steel pipe: adopt Q235B steel in GB700, its quality shall meet the requirements of current national industry standard carbon steel GB700-88, and it shall have the qualification of compressive strength, elongation, tensile strength, sulfur, carbon water content and cold drawing test. Seamless steel pipe of grid structure shall be strictly implemented in the stages of component material opening No., electric welding, spraying, testing, etc.

High strength bolt (GB / t16939) is used for connection point. 40Cr in gb3077 is used. Heat treatment cracks are not allowed in all positions or lengths of finished products. The surface compressive strength reaches hrc32-36. The external thread shall conform to 6G in general external thread tolerance and fit (gb197). The surface shall be blackened and coated with anti rust agent.

     3. The bearing steel ball anchor bolt ball is made of 45 steel in the technical standard for high quality carbon steel (gb699).

     4. Cone head: Q235B steel casting.

     5. Plain nut: Q235 steel casting is used, and 45 steel casting is used when the high strength diameter is more than 30.

     6. Q235B steel is used for rubber bearing, support and connecting parts.

     Technical grid installation and production and processing are very critical, which will produce the advantages of quality. For the characteristics of steel structure grid construction, the grid itself is very light, high compressive strength, small land occupation, in the whole process of installation, it must be composed of manual services, without the use of technical staff to develop the actual operation of the project construction, the installation is very convenient.

     The application of grid structure engineering covers a wide range, has the characteristics of good natural ventilation standard, convenient disassembly and assembly, and has strong span. Generally, the body shape of grid structure can be seen in the infrastructure construction of Stadium Engineering and industrial workshop, which is a relatively good aluminum profile for engineering construction at the present stage, with high support, compression resistance, sand resistance, etc. for grid structure engineering It has been used very well.

     Generally speaking, in the construction of grid structure engineering, the general assembly method, the general hoisting method and the hoisting method are usually used. The different assembly methods should be selected according to the engineering construction regulations of the project, and the actual effect will be more prominent.