Channel rail straightening method
A channel-shaped rail and straightening technology, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of rail waist bending, straightening, straightness and residual stress at the bottom of the rail, etc., so as to avoid bending Deformation, improve stability, prevent rail waist from cracking and scratching
Active Publication Date: 2021-01-26
武汉钢铁有限公司
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Problems solved by technology
Due to the complex cross-section of the grooved rail, and the large rail height and rail bottom width, it is difficult to control the straightness and residual stress of the rail bottom after straightening. If the straightening pass is not designed properly, it is easy to cause rail surface scratches Quality defects such as rail waist bending or cracking
Method used
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[0026] The present invention will be further described in detail below in conjunction with specific examples and comparative examples to facilitate a clearer understanding of the present invention, but they do not limit the present invention.
[0027] The channel straightening method of the present invention, the section of the channel rail is asymmetrical up and down, left and right, and the channel rail is continuously straightened by a horizontal and vertical composite straightening machine, including a horizontal straightening machine and a vertical straightening machine, wherein the horizontal The straightening machine includes several evenly spaced upper rolls and several evenly spaced lower rolls, and the vertical leveler includes several evenly spaced left rolls and several evenly spaced right rolls; the straightening method is as follows:
[0028] 1) One upper straightening roller is installed on each upper roller, one lower straightening roller is installed on each lo...
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Abstract
The invention discloses a method for straightening a trough rail, comprising: upper and lower straightening passes, left and right straightening passes, upper straightening rollers and grooved rail head tread surface contact force point area control, upper A sufficient gap is reserved between the straightening roller and the rail head groove and rail lip of the grooved rail. The left and right abdominal cavity straightening rollers are in contact with the grooved rail waist in two stages. The horizontal centerlines of the straight rollers are on the same horizontal line; the abdominal cavity straightening rollers maintain a sufficient gap with the lower jaw of the grooved rail head and the upper surface of the rail bottom. Improve the stability of the straightening process of the channel rail, can effectively ensure the straightness of the channel rail after straightening and the residual stress of the rail bottom meet the standard requirements, and avoid cracking and scratching of the channel rail waist during the straightening process defect.
Description
technical field [0001] The invention belongs to the technical field of straightening grooved steel rails with complex sections, and in particular relates to a method for straightening grooved steel rails. Background technique [0002] Modern tram is an advanced transportation mode developed through comprehensive transformation and upgrading on the basis of traditional tram. It has the characteristics of low energy consumption, less pollution, medium transportation volume, and low cost. It has become a new type of urban rail transit. way, is booming, the track is the use of grooved steel rails. [0003] The section shape of the grooved rail is complicated, and the top, bottom, left, and right are asymmetrical. It is the most difficult type of rail to produce. Due to the uneven distribution of metal on the cross-section of the grooved rail, the amount of metal in the rail head is large, and the amount of metal in the rail waist and rail bottom is small. Bending process is us...
Claims
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IPC IPC(8): B21D3/02B21D3/16B21D37/16
CPCB21D3/02B21D3/16B21D37/16
Inventor 周剑华郑建国叶佳林董茂松朱敏费俊杰王俊陈鹏飞王瑞敏欧阳珉路
Owner 武汉钢铁有限公司