As we all know, the square tube is generally made of steel or steel plate welding. The specific production process process is as follows:
1. Raw material preparation: Use steel rolls, welded wires and welds as raw materials. These raw materials must be strictly chemically inspected before investment.
2. Bring steel head and tail docking: use single -silk or dual -wire buried arc welding, and then rolls into a galvanized square tube. After rolling into a square tube, automatic buried arc welding will also be used to replenish welding.
3. Pre -forming processing: Taking steel through flat, cutting, planing, and surface cleaning and transportation.
In the process of production and processing of square pipes, there are several notable matters:
When the production party tube, pay attention to the caliber and tube end so that it can be convenient and fast in the installation welding process.
For square pipes with large production diameter and thick walls, pay attention to reinforcement or brackets on steel pipes to prevent the square tube from ellipse or diameter deformation during transportation.
The accuracy of the square tube is very important.
Do not bite the welding mouth. The two welded edges of the rolled steel pipe are flattened, so that the welded steel pipes can be beautiful and standardized.
The straightness of the square tube not only affects the overall appearance, but also affects the later construction welding. If the square tube is twisted, it is usually caused by the remaining stress left when the rolling machine is adjusted properly, the residual stress left during rolling, or cooling unequal to the section and length along the tube. Therefore, the process of the school is the key. Through plastic tortuous, the large twists and turns are turned into small tortuousness to meet the technical requirements.
The qualified square tube not only needs to strictly control the quality during the production process, but also requires careful inspection after all the processes are completed to ensure that it becomes a product of qualified quality and meets market demand.
