CN-121988642-A - Asymmetric C-shaped steel production method based on radial deflection regulation and control

Abstract

The invention relates to the technical field of section steel manufacturing, and discloses an asymmetric C-shaped steel production method based on radial deflection regulation, which comprises the following steps: the asymmetric C-shaped steel is provided with a web plate, wing plates and a flange, and is formed by cold bending of a plate, and the radial deflection of the web plate is regulated during cold bending, so that an inclination angle is formed after the web plate is formed, and torque generated in the forming process of the asymmetric C-shaped steel is counteracted through the inclination angle of the web plate. According to the invention, the radial deflection of the web plate is regulated, so that the web plate is formed into an inclined angle, thereby being capable of counteracting the torque generated in the asymmetric C-shaped steel forming process, reducing the torsion defect from root and saving the subsequent straightening process.

Inventors

• KONG NING
• ZHANG JUXIANG

Assignees

• 北京科技大学

Dates

Publication Date

20260508

Application Date

20260320

Claims (5)

1. 1. The asymmetric C-shaped steel production method based on the regulation and control of radial deflection is characterized by comprising the following steps of: The asymmetric C-shaped steel is provided with a web plate, wing plates and a flange, and is formed by cold bending of a plate, and the radial deflection of the web plate is regulated during cold bending, so that an inclination angle is formed after the web plate is formed, and torque generated in the forming process of the asymmetric C-shaped steel is counteracted through the inclination angle of the web plate.
2. 2. The production method of the asymmetric C-shaped steel based on the radial deflection regulation and control is characterized in that the wing plates of the asymmetric C-shaped steel comprise a left wing plate and a right wing plate, the wing plates comprise a left wing plate and a right wing plate, the midpoint position of a web plate is taken as an origin, the feeding direction of the plate is taken as a z-axis, the direction perpendicular to the web plate is taken as a y-axis, the direction parallel to the web plate is taken as an x-axis, a rectangular coordinate system is established, the integral centroids of the wing plates and the two side wing plates are projected on the x-axis and the y-axis, and the centroid calculation formula is as follows: the centroid calculation formula of the left wing plate and the left wing edge is as follows: The centroid calculation formula of the right wing plate and the right flange is as follows: Make the asymmetric C-shaped steel rotate around the z-axis by an angle So that the two centroids are at the same level; The inclination angle beta of the web is calculated according to the following formula: In the above formula, L1 is the left wing plate length, L2 is the right wing plate length, L3 is the web plate length, L4 is the left wing edge length, L5 is the right wing edge length, α1 is the angle between the web plate and the left wing plate, α2 is the angle between the web plate and the right wing plate, α3 is the angle between the left wing plate and the left wing edge, α4 is the angle between the right wing plate and the right wing edge, t is the plate thickness, and K is the residual stress correction coefficient.
3. 3. The method for producing asymmetric C-shaped steel based on radial deflection regulation according to claim 1, wherein the radial deflection of the web is regulated by asymmetric rollers.
4. 4. The method for producing the asymmetric C-shaped steel based on the radial deflection regulation according to claim 3, wherein the contact surface of the asymmetric roller and the web is an inclined surface matched with the inclination angle of the web.
5. 5. The method for producing asymmetric C-shaped steel based on radial deflection regulation according to claim 1, wherein the radial deflection of the web plate is regulated after the flange forming and before the wing plate forming pass, so that an inclination angle is formed after the web plate is formed.

Description

Asymmetric C-shaped steel production method based on radial deflection regulation and control Technical Field The invention relates to the technical field of section steel manufacturing, in particular to a production method of asymmetric C-shaped steel based on radial deflection regulation. Background The C-shaped steel is a common cold-formed steel for buildings, and is widely applied to structures such as purlines, wall beams and the like. The structure of the C-section steel is generally symmetrical, however, in some special cases, the C-section steel needs to be designed into an asymmetrical structure. In the cold bending forming process of the C-shaped steel roller, the bending force applied by the roller to the strip steel is actually the transverse force transmitted through the contact point, and for the asymmetric C-shaped steel, the section of the asymmetric C-shaped steel is of an asymmetric structure, so that the forming force acting line and the shearing center have eccentricity, additional torque can be generated in the forming process of the asymmetric C-shaped steel, and torsion defects are extremely easy to generate on a final product. Such torsion defects may seriously affect the installation accuracy, the load-bearing performance and the appearance quality of the section steel. In order to solve the above problems, the current countermeasure is to eliminate the torsion defect by mechanical straightening or manual intervention after the forming process, which not only increases the production process, but also may cause new defects due to improper introduction of additional stress by straightening. In view of this, it is a matter of urgent need for those skilled in the art to solve the problem of how to reduce or avoid the torsion defect of the asymmetric C-section steel and to reduce the straightening process. Disclosure of Invention The invention aims to provide an asymmetric C-shaped steel production method based on radial deflection regulation and control so as to solve the problems in the prior art. In order to achieve the above purpose, the invention provides an asymmetric C-shaped steel production method based on regulating radial deflection, which comprises the following steps: The asymmetric C-shaped steel is provided with a web plate, wing plates and a flange, and is formed by cold bending of a plate, and the radial deflection of the web plate is regulated during cold bending, so that an inclination angle is formed after the web plate is formed, and torque generated in the forming process of the asymmetric C-shaped steel is counteracted through the inclination angle of the web plate. The wing plates of the asymmetric C-shaped steel comprise a left wing plate and a right wing plate, wherein the wing plates comprise a left wing plate and a right wing plate, the middle point of a web plate is taken as an origin, the feeding direction of the plate is taken as a z-axis, the direction vertical to the web plate is taken as a y-axis, the direction parallel to the web plate is taken as an x-axis, a rectangular coordinate system is established, the whole centroids of the wing plates and the two side wings are projected on the x-axis and the y-axis, and the centroid calculation formula is as follows: the centroid calculation formula of the left wing plate and the left wing edge is as follows: The centroid calculation formula of the right wing plate and the right flange is as follows: Make the asymmetric C-shaped steel rotate around the z-axis by an angle So that the two centroids are at the same level; The inclination angle beta of the web is calculated according to the following formula: In the above formula, L1 is the left wing plate length, L2 is the right wing plate length, L3 is the web plate length, L4 is the left wing edge length, L5 is the right wing edge length, α1 is the angle between the web plate and the left wing plate, α2 is the angle between the web plate and the right wing plate, α3 is the angle between the left wing plate and the left wing edge, α4 is the angle between the right wing plate and the right wing edge, t is the plate thickness, and K is the residual stress correction coefficient. Further, the radial deflection of the web is adjusted by asymmetric rolls. Further, the contact surface of the asymmetric roller and the web is an inclined surface matched with the inclination angle of the web. Further, after the flange is formed and before the wing plate forming pass, the radial deflection of the web plate is regulated, so that an inclination angle is formed after the web plate is formed. The invention discloses the following technical effects: 1. According to the invention, the radial deflection of the web plate is regulated, so that the web plate is formed into an inclined angle, thereby being capable of counteracting the torque generated in the asymmetric C-shaped steel forming process, reducing the torsion defect from root and saving the subsequent straightening pro