Non-Alloy Cold Rolled Q235 Q345 Rectangular Pipe Pre Galvanized Welded Square Hollow Section

Forming method
1, solid bent

Solid bending, as the name implies, is compacted bending, and the inner and outer rollers and the inner and outer walls of the tube blank are compacted in both directions during solid bending.

1) The advantages of solid bending are small rebound, accurate forming, and as long as the roller type is accurate, the R of inner Angle forming is more accurate.

2) The disadvantage of solid bending is the stretching/thinning effect.

First, the real bending will produce tension at the bending, and the stretching effect will shorten the longitudinal length of the bending line;

Second, the metal will be thinned by stretching at the bend.

2, empty

Empty bending is through the one-way contact between the outer roller and the outer wall of the tube blank to form a bending moment to bend the material. Empty bending will cause compression of the bending line. The compression effect makes the bending line lengthwise and the metal at the bending place appears to accumulate and thicken, which is the compression/thickening effect of empty bending.

1) The advantage of empty bending is that side length bending can be carried out when real bending is not possible, such as the top/side synchronous bending and finishing of square rectangular tube. You can also bend in the air. 0.2t inner Angle without wall rupture.

2) The disadvantage of air bending is that in the upper/side synchronous air bending, due to the pressure of the upper roll and the lower roll at the same time, the forming force is easy to exceed the critical point, resulting in the edge instability concave, and will also affect the stable operation of the unit and forming quality. This is the square tube and circular tube empty bending molding different characteristics.

Square tube uses
The purpose of the square tube construction, machinery manufacturing, steel construction projects, shipbuilding, solar power stents, steel structure engineering, electric power engineering, power plants, agricultural and chemical machinery, glass curtain wall, automobile chassis, airport, boiler building, highway railings, housing construction, pressure vessel, oil tank, bridge, power station equipment, Lifting and transportation machinery and other high load welding structures.

Jiangsu Irunt Steel Group Co., Ltd. is located in Wuxi City , Jiangsu Province, China, which is the largest steel production base. After 30 years of efforts, it has grown from a family factory to a group company.

The group company mainly produces and sells a series of steel products such as steel pipe, steel coil, steel plate, copper pipe, copper plate, copper strip, aluminum pipe, aluminum plate, galvanized steel pipe, galvanized coil, galvanized plate and so on.The group company has established five platforms, including three production plants and two processing plants. At present, it is still expanding its production line, basically forming a development model of integration of production, processing and sales.

Our annual production capacity of various specifications is about 1 million metric tons. In addition to being a supplier of our series of products, the group company is also committed to expanding its commitment to customers by strengthening services and adding new facilities. A dedicated team is responsible for providing technical support, recommending the correct use of steel, and assisting customers to give full play to their products.

Over the years, we have opened up new markets in Africa, Southeast Asia, the Middle East and America. Our best service and excellent quality have led long-term partners in many countries and established continuous business relations with all customers. Our principle is "service first, sales second". Most of the time, we have comprehensive inspection and procurement to control the quality of finished products. We will have a professional inspection team to test each delivery of products.

Since its establishment, in line with the mission of "contributing high-quality products and services to the world" and the core values of "customer first, excellence, coexistence and win-win", we ensure that we can deeply cooperate with all our friends in the field of iron and steel, and win more affirmation and praise from the market and customers with its high-quality products, perfect product team and thoughtful service, I believe tomorrow will be better!