Control method for rolling high points of steel rail through universal method

By optimizing the rolling procedure of the universal machine and installing a high point control device at the edge rolling entrance, the quality defect of rolling high "high points" in traditional rail rolling is solved, and the high fluctuation of rails is significantly reduced, satisfying the use of high-speed trains Required, and simple equipment and low investment.

CN119140616APending Publication Date: 2024-12-17HEBEI YONGYANG SPECIAL STEEL GRP CO LTD
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Patent Information

Application Number
CN202310717998.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-06-16
Publication Date
2024-12-17

AI Technical Summary

Technical Problem

There are quality defects in traditional rail rolling equipment with high rolling "high points", which affects the smooth operation of the train. Especially after the development of high-speed trains, the requirements for "high points" control are stricter, and the existing technology is difficult to effectively solve.

Method used

By optimizing the rolling procedure of the universal machine, the speed-down rolling of the last-pass rolling part is achieved, and a high-point control device is installed at the edge rolling machine entrance, which automatically puts the rolling part before it leaves the universal rough rolling mill to control the position of the rolling part rail head.

Benefits of technology

Effectively reduce the fluctuation range of the tail rail high, reduce the "high point" value, from 0.4-0.6mm to below 0.2mm, meets the requirements for rail use, has a simple equipment structure and less investment, and achieves rail high." High point" stable control.

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Abstract

The invention discloses a control method for rolling a high point of a steel rail by a universal method, which is characterized in that a rolling mill for rolling the steel rail by the universal method is generally arranged by five racks, namely a first cogging mill, a second cogging mill, a universal roughing mill, an edging mill and a universal finishing mill; according to the control method, when the tail of a rolling piece in the last pass of a universal unit is separated from universal rough rolling, the swing of the rolling piece at the inlet of an edging mill is controlled to reduce the high point, and the swing of the rolling piece is reduced through two schemes: firstly, the rolling speed of the tail in the last pass of the universal unit is reduced; and secondly, a rolled piece stabilizing device (as shown in the figure) is designed and mounted at an inlet of the edging mill, the rolled piece stabilizing device is automatically put into use before the tail part of the rolled piece of the last pass rolled by the universal unit is separated from the universal roughing mill, and the rolled piece is supported through a guide wheel at the front end of the device, so that the swinging of the rolled piece is reduced, and the effect of reducing a high point is achieved.
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Citation Information

Patent Citations

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  • Hot rolling production method of H section steel

    CN113399452A

  • Tail size control method and device in steel rail rolling process and steel rail

    CN115156288A

  • Strip pressing device of strip steel recoiling machine

    CN203944664U

  • Ultrathin metal lithium foil winding device

    CN211757709U

Cited By

  • Steel rail rolling high and low point defect control method

    CN119839054A

  • A method for controlling high and low point defects in rail rolling

    CN119839054B