Extrusion rolling process and extrusion rolling equipment for sharp R angle of profile

Abstract

The invention relates to an extrusion rolling process for a sharp R angle of a profile, which comprises the following steps of: continuously implementing N extrusion rolling procedures on the profile with the radius size of the R angle of the outer contour being R0, N being greater than or equal to 3 and less than or equal to 14, reducing the radius size of the R angle of the outer contour by deltaRi after the ith procedure is finished, i belonging to [1, N], and reducing the radius size of the R angle from R0 to RN after the N extrusion rolling procedures. According to the extrusion rolling process, the pressure stress can be formed on the surface of the profile to improve the fatigue strength, so that the strength of the profile is integrally improved, particularly, the tensile strength of the R-angle area is good, and the phenomenon of cracks or fractures is not prone to occurring after long-time use. The invention further relates to extrusion rolling process equipment for realizing the extrusion rolling process and a regional sharp R-angle extrusion rolling process.

Description

technical field [0001] The invention relates to the field of rolling technology, in particular to a rolling technology for extrusion forming of sharp R angles of metal profiles. Background technique [0002] In industrial design, such as the structural design of metal components of curtain walls and door and window systems in the field of architectural engineering and design, metal profiles formed by cold bending and rolling are often used. [0003] Due to the needs of structural design or modeling, the outer contours of these metal profiles usually have some bends and corners. In engineering design, it is generally believed that sharp corners are absolutely prohibited in metal components, because from theoretical analysis, when the radius of curvature of the fillet tends to zero, its stress concentration system tends to infinity. Replacing sharp corners with rounded corners can effectively alleviate stress concentration. Therefore, these bends and corners will form rounde...

AI Technical Summary

Problems solved by technology

Although this method can also achieve sharp R-angle molding, due to local heating, during the sharp R-angle molding process, the force conduction between local material particles is barely connected, resulting in local stress concentration of the profile, and the structural stability of the formed material. Reduced uniformity, partial heating, poor control of the fluidity of the internal structure of the raw material, easy to cause uneven molding R-angle structure, and poor aesthetics

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