Domestic steel production and installation of processing pro

Steel is a steel structure residential housing as a bearing support system, an important addition to its other maintenance system, The quality of the steel structure itself, directly affect the project's quality and safety. Therefore Steel Structure processing, manufacturing and installation is essential aspects. Steel manufacturing has been the national standard specification, namely, (steel construction and acceptance) GB50205-2001, here only in respect we have emphasized the special needs of the construction process, or should pay particular attention to some of the issues raised for reference.

First, the good relations of raw materials, the development of China's steel housing slow or stagnant One reason is that China's steel production by the state of the decision. Nineties had not by leaps and bounds because of China's steel production is less, unstable. As China's reform and opening up national strength, steel production has exceeded 100 million tons of steel to enhance the variety of quality are stable. Residential steel materials used have been basically met. Residential development for the steel and laid a solid foundation. The steel structure steel structure housing the material is essential. Processing in the steel itself, the processing plant, the first design drawings of the material according to technical requirements of digestion, according to Gang Jiegou own characteristics, the procurement of raw materials meet the design requirements, in this session should pay attention to the following two points:

1. According to design requirements, generally use the Q235, Q345, Q390, or fire-resistant steel building candidates, the quality of domestic production of these materials can basically meet the requirements, but remember to purchase relatively large domestic steel company, and not purchasing a small factory producing massless guarantee products. Buy raw materials from the middle of materials, some materials required to produce quality material suppliers and factory certificate to prove one. Only qualified to meet the design requirements to the procurement of materials. And pay special attention to the batch number and quality of materials that are consistent with a single, prevent impersonation.

2. After the material into the plant material must be conducted in batches No. retest, mainly to do physical properties and chemical composition of the test to verify their compliance with national standards. The main high-rise building beams and columns to the properties of the material to do Z testing, or the manufacturer to the performance requirements proposed by Z. Lamellar tearing of steel components to prevent the situation there. In the low temperature conditions, especially in northern areas of the steel products to do the cold temperature impact test. To ensure the quality of raw materials is the basis of good steel products.

The second aspect is the production processes in the factory of the detail design, the main processing plant is responsible for design intent and design according to the main data presented, and then under each of the equipment and processing capabilities, providing the drawings of the design institutes to deepen, detailed construction design, including ease of installation for future, make appropriate form node, node location, the installation of the length, (based on on-site mechanical design capabilities, transportation Yiji technical requirements set design), and in the processing of convenience. In considering the above factors, by the plant design institute of technology or the design departments of the drawings provided, (if necessary in consultation with the institute to reach a consensus on many occasions) plant construction drawing production processing technology to implement the blueprint issued. If the linkage with CAD and CAM is the ability to much more convenient.

The third part is the processing plant prior to the experienced engineers and production departments to prepare processing technology. Production process of the preparation process to determine the route according to the construction blueprint, while the preparation of: blanking process, welding process, assembly process and other important processes of technical rules. Are expected to process, to different thickness, different materials and welding, installation and welding shrinkage and other factors to consider the request, propose cutting size and cutting edge quality requirements, while the next process to fully consider the material feed utilization, using advanced equipment can be controlled by computer, no computer control of the factory, to be used like so enlarged, it is important to a good processing quality related, such as welding procedures, to try to automatic welding, automatic welding to create the conditions for creating the appropriate Tooling and mold. Necessary to organize experienced technicians and senior technicians discuss the process of preparation, for example, which parts should adopt automatic welding, and which parts should use hand-welding, manual welding to welding the main exchange, or to the main DC arc welding machine or mainly to carbon dioxide and other gas welding. How to prevent the welding stress and deformation problems, how to reduce stress concentration problems, how to release stress given area and so on. For different thickness and different materials such as pre-welding between the welding be done in testing and evaluation, select the correct welding process, even if the same material thickness and the same between the welding material, but also to prevent the welding deformation of the weld preparation technology, such as taking symmetry welding, then at least take some welding welding, required penetration part of the plate, how much open groove welding. In addition, there is a level of weld problems, which is one, which is 2, that is not too high, nor did it reduce the standard case of doubt can be negotiated with the design unit. Whether to adopt welding primer, to ensure the welding quality, welding materials, some materials, welding preheat temperature and time, and welding procedures for post-processing has to be determined by test welding welding parameters, welding selection, welding temperature control, outdoor indoor temperature and humidity requirements of other relevant factors to ensure the welding quality, the processing to make provisions prior to this must be clear. Production in construction prior to construction personnel are trained before it can start producing. Then there assembled the development process is also important. Assembled in the order, how to control the overall size and so on, must also have certain rules and standards to ensure the qualified products factory.