25
2022
-
10
Characteristics of steel bending
Author:
Qingdao Yuanhao
Steel bending manufacturers said that bending is the stamping process of bending metal plates, pipes and profiles into a certain curvature, shape and size of the workpiece. Bending forming is widely used in the manufacture of high-pressure vessels, boiler drum, boiler furnace tube, hull steel plate and bone ribs, various utensils, instrumentation components and box and cabinet insert strips.
When the material is bent, the stress state of each part in the deformation zone is different. The non-deformed part of the middle of the cross section is called the neutral layer. The metal outside the neutral layer is subjected to tensile stress, resulting in elongation deformation. The metal within the neutral layer is subjected to compressive stress, resulting in compressive deformation. Since the stress and strain directions of the metals on both sides of the neutral layer are opposite, when the load is removed, the elastic deformation of the metals on both sides of the neutral layer returns in opposite directions, causing different degrees of rebound. Although the bending deformation is limited to the local area of the material, the elastic effect will affect the accuracy of the bending part. There are many influencing factors of elastic recovery, and these factors are difficult to control. The precision problem of the bending parts caused by elastic recovery has always been the key to the production of bending forming.
When the use of steel bending when it can be complex structure of the profile section for bending. Multi-arc variable curvature profile can be realized. The arc bending precision is high, the material springback is stable, and the workpiece size is consistent. In particular, it can effectively reduce the residual stress inside the material, and the product has good dimensional stability. Due to the cold work hardening of the metal material, the mechanical properties of the material can be improved after the material is stretched and bent. When this steel is stretched, its design principle is limited to not exceeding the elongation of the material. When the steel is stretched and bent, there will be forming defects such as thinning of the wall thickness, fracture, wrinkling and deformation of the section. These forming defects are related to the profile. Mechanical properties, section shape and drawing bending process parameters are closely related. Especially in the technical capacity of the project, three factors need to be considered whether the jaw distance of the equipment meets the stretching length of the material, and whether the jaw size meets the clamping requirements of the section size. Calculate the amount of tension required for the material.
Steel bending needs to be completed after completion. With the rapid change of society, science and technology are more and more developed. Therefore, there are more and more processing methods, such as basic CNC machining, cutting, welding, tapping, etc. What's more, in the rapid development of artificial intelligence robot industry and national wind power industry in recent years, many steel bending products need to be processed into arcs. Generally speaking, there are many common processing methods, such as rounding machine, rounding machine, manual rounding tool, etc.
Previous article
Next article
Contact Phone
E-mail:yuanhaolawan@163.com
Address: No. 9, E6 District, jinjiaozhou steel market, Nanfang Jiayuan, Jiaozhou, Qingdao
Pay attention to WeChat
WeChat applet