Straightening structure for groove-shaped rail

Abstract

The invention relates to the field of sectional material rolling, in particular to a straightening structure for a groove-shaped rail. According to the technical purpose to be achieved, the straightening structure for the groove-shaped rail is provided, a hole pattern straightening structure is designed for the phenomenon that the waist part of the groove-shaped rail is likely to be subjected to bending deformation in the straightening process, the stressed state of bending deformation during straightening is optimized, and waist part deformation on the section cannot be generated while the groove-shaped rail is bent. The straightening structure comprises the groove-shaped rail to be straightened. The top of the groove-shaped rail is composed of a rail head, a rail groove and a rail lip. The middle portion of the groove-shaped rail is composed of a rail waist. The bottom of the groove-shaped rail is composed of a rail bottom. The straightening structure comprises a straightening roller composed of an upper straightening roller body and a lower straightening roller body. The rail bottom of the groove-shaped rail is arranged on the lower straightening roller body. The upper straightening roller body is arranged on the rail head and the rail groove. The upper straightening roller body is embedded in the rail groove and is attached to the inner wall of the rail groove through a left side arc and a right side arc of the upper straightening roller body. An interference gap is arranged between the bottommost end, embedded in the rail groove, of the upper straightening roller body and the bottommost end of the adjacent rail groove. The straightening structure is particularly suitable for technology occasions where the groove-shaped rail is accurately corrected.

Description

technical field [0001] The invention relates to the field of profile rolling, in particular to a grooved rail straightening structure. Background technique [0002] At present, the correction method adopted for the asymmetry between the rail head and the rail lip of the grooved rail, especially for the technical problem that there is a gap of about 6 mm between the highest point of the rail head and the rail lip, has the following defects. When the upper straightening roller adopts the rail lip and the rail head to bear the force in pass design, there will be two problems: 1. The elastic deformation of the rail lip is greater than that of the rail head, causing the deformation to be biased to the rail head side, causing the waist to bend and deform . 2. When the force on the rail lip is too large, stress concentration will occur at the bottom of the rail groove, causing the bottom of the rail groove to crack. Therefore, the traditional straightening structure is difficult ...

AI Technical Summary

Problems solved by technology

[0002] At present, the correction method adopted for the asymmetry between the rail head and the rail lip of the grooved rail, especially for the technical problem that there is a gap of about 6 mm between the highest point of the rail head and the rail lip, has the following defects. When the upper straightening roller adopts the rail lip and the rail head to bear the force in pass design, there will be two problems: 1. The elastic deformation of the rail lip is greater than that of the rail head, causing the deformation to be biased to the rail head side, causing the waist to bend and deform

2. When the force on the rail lip is too large, stress concentration occurs at the bottom of the rail groove, causing the bottom of the rail groove to crack

Therefore, the traditional straightening structure is difficult to meet the actual production needs

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