?? Shandong shunxinda Machinery Co., Ltd. (13969559358) is located in Liaocheng Economic Development Zone, Jiangbei water city with beautiful scenery. It is a company specializing in the production, processing and sales of precision seamless pipe, cold drawn precision seamless pipe and cold-rolled precision seamless pipe
Calculation formula of spot bearing capacity of 20g precision Q345B precision bright tube
There are about 10 20Cr precision steel pipe processing plants in Xinjiang with an annual output of 35000 tons (the blank pipe is supplied by Baotou and Hengyang pipe works). Therefore, the design and construction procedures of profiled metal 20Cr precision steel pipe are supplied by large-scale 20Cr precision steel pipe enterprises in the mainland. A large-scale seamless pipe project with an annual output of 1.6 million tons is newly built in Xinjiang, It seems that the market demand and the source of blank tube should be considered carefully.
Moreover, the domestic oil well pipe production capacity has reached 8.5 million tons, the excess capacity is about 3 million tons, and the spot production capacity of precision Q345B precision bright pipe is about 600000 tons. The seamless pipe industry has serious product homogeneity, excess capacity, and repeated construction of high-level incremental equipment. Therefore, the development strategy of seamless pipe industry in the post crisis period is to change the development mode, adapt to the needs of low-carbon economy, save energy and reduce emissions, Improve the level of process operation, give full play to the ability of first-class advanced equipment, produce high-quality products, implement product differentiation and technology differentiation, and occupy the technical commanding point of world advanced level of 20Cr precision steel pipe. In order to improve the concentration of enterprises, the enterprises should be reorganized immediately after merger, which shows that the enterprises are effective after reorganization. Research on bending bearing capacity of profiled 20Cr precision steel pipe based on direct strength method; the wide thickness ratio of profiled 20Cr precision steel pipe is large, and the elastic modulus of aluminum material is small, so the local stability problem is prominent. Both domestic and foreign aluminum alloy codes allow the local buckling of profiled 20Cr precision steel pipe before the overall failure, and the post buckling strength is used. At present, the effective section method is mainly used to calculate the post buckling strength to consider the influence of buckling on the bearing capacity. Effective section method includes effective width method and effective thickness method. The disadvantage is that we must first calculate the effective width or thickness according to the stress distribution on the cross-section, and then calculate the geometric properties of the effective cross-section, which is often very cumbersome. The research in this paper is aimed at this problem. Firstly, the ANSYS finite element analysis is carried out for six kinds of profiled 20Cr precision steel pipes, According to the results of finite element analysis, the bending capacity of the plate under pure bending is obtained. Then, based on the direct strength method, the calculation formula of bearing capacity of profiled 20Cr precision steel pipe under pure bending is proposed. The results of ANSYS finite element analysis are compared with those obtained according to "code for design and construction of profiled metal plates" and "European Code for aluminum alloy structures" and the formula based on direct strength method. The results show that the proposed formula can accurately calculate the bearing capacity of profiled 20Cr precision steel pipe under pure bending, At the same time, the tedious calculation of effective section and its section characteristics is avoided, which is convenient to use. The key to design by direct strength method is to solve the local buckling stress F_ In this paper, the influence of the ratio of web net length to compression flange width H / B and the ratio of half of tension flange width to compression flange width D / B on local buckling coefficient K was studied, and the approximate calculation formula of elastic local buckling coefficient K was fitted, and then the local buckling stress F of section could be easily calculated
?? The company reserves a variety of specifications of precision seamless pipe, cold drawn precision seamless pipe, cold-rolled precision seamless pipe, perennial business in Tianjin, Baotou Steel, Baosteel, Hengyang, Angang, Chengdu, Yegang, Lubao, Anyang, Jiangyin, Hongdu and other high-quality seamless steel pipe, alloy steel pipe, high-pressure boiler pipe, alloy high-pressure seamless pipe, thick wall seamless pipe, fluid pipe, structural pipe, chemical fertilizer special pipe, Petroleum cracking pipe, low pressure boiler pipe, large diameter seamless pipe, large diameter welded pipe, precision steel pipe, etc. The materials of common resources are: 10 กม 10, 20 กม 10, 45 กม 10, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 12Cr1MoVG, 15CrMoG, 10CrMo910, 20Cr, 40Cr, 35CrMo, 304, 316, 316L, 310S, 309S, etc.