Design and concept of cold formed section steel

Cold formed section steel is a kind of economic section steel widely used in construction, transportation, machinery, home appliances and other industries. Its section structure is reasonable, varieties and specifications are various, and geometric dimensions reflect the requirements of modern society for the use of lightweight, rationalized and functional materials. Since the beginning of the 20th century, cold formed technology has made great progress in the world. Until the 1980s, only the United States There are more than 18000 production lines with an annual production capacity of more than 3.5 million tons of cold-formed section steel. In China, since the construction of cold-formed units in the late 1950s, it has experienced a tortuous process of development and adjustment. In the past 20 years, the advantages of cold-formed section steel have been recognized by people. The cold-formed section steel has made great development. However, no matter from the aspects of production, quality, variety and consumption, application field, or from the level of equipment, process water There is always a gap between China and other developed countries

However, it can be predicted that there will be a greater development of cold-formed steel in China. Cold bending forming is an important field of strip deep processing. In view of the complexity of geometry, kinematics and dynamics of its deformation process, it has obvious geometric nonlinearity, physical nonlinearity and boundary nonlinearity. Therefore, the technicality of its production process law is quite important. In recent years, the high efficiency of cold bending production The development of a series of new cold bending technologies, including process simulation technology, optimization design and CAE technology, high-precision processing technology, flexible production technology, composite processing and deep processing technology, is promoted by the rate, high added value and multi variety, which makes the cold bending process transition from technology to engineering science, to process synthesis, technology synthesis and material synthesis.