Method for adjusting the head width of a rail

Abstract

The application discloses a method for adjusting the head width of a steel rail, which comprises the following steps: obtaining head width specification data according to production data, setting the measured value of the head width of the steel rail as X and the standard value of the head width of the steel rail as X0; judging whether the size deviation Δ of the measured value X and the standard value X0 is greater than the control deviation Δ0; when Δ=|X‑X0|>Δ0, adjusting the head width; determining the adjustment value, Δ‑Δ0=adjustment value, and determining the corresponding adjustment scheme through the adjustment value. The application forms the adjustment scheme for different deviations of the head width specification of the steel rail based on experience extraction, constructs an experience model library, automatically retrieves the corresponding adjustment scheme according to the real-time head width deviation, realizes the accurate control of the head width specification, effectively guarantees the stable rolling, improves the control precision of the head width of the steel rail, improves the timeliness of the adjustment and the normalization of the rolling adjustment, solves the problems of low efficiency and many errors of manual adjustment, and effectively reduces the fluctuation of the head width specification of the product.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a method for adjusting the width of the top edge of a steel rail. Background Technology

[0002] Heavy rail production typically employs two methods: the traditional two-roll mill and the four-roll universal mill. Heavy rails produced using the two-roll mill cannot meet the requirements of modern high-speed heavy rails in terms of surface quality, dimensional accuracy, and crown fullness. Modern advanced heavy rail production lines all utilize the four-roll universal mill. Universal milling of rails differs significantly from traditional roll forming. It involves rolling a preliminary rail shape using two roughing mills, establishing the proportional relationship between the beginning, web, and end of the rail—this is the foundation of universal milling. Universal mill units generally use three or five stands. Five stands offer higher control precision and consist of a universal roughing mill (UR1), an edge mill (E1), a universal intermediate mill (UR2), an edge mill (E2), and a universal finishing mill (UF). Through multiple rolling passes, the final finished product is produced. Besides the correlation between the head width and web thickness, the bottom width and top width can be adjusted independently without affecting each other. There are also multiple adjustment methods, offering greater flexibility and ease of adjustment compared to traditional rolling methods. The main advantage of this rolling method is that the rolling of the rail head and bottom is performed by the vertical rolls during the direct pressing of the head and bottom rolls, with the rolling direction being the same as the roll's rotation direction. For example... Figure 1 The diagram shown is a process flow chart for the universal method of rolling rail profiles.

[0003] In rail production, various methods for adjusting the rail head width exist, and the overlapping influence between adjustment parameters and issues related to parameter accuracy lead to inconsistencies between the analysis results of equipment parameters and specifications and the actual deformation patterns and adjustment methods. The key to ensuring high-precision control of the rail head width lies in refining and reconstructing manual experience, extracting the essence and discarding the dross, to construct a unified adjustment scheme.

[0004] In view of this, improvements should be made to the existing technology. Summary of the Invention

[0005] The main objective of this invention is to provide a method for adjusting the top width of rails. Based on empirical extraction, adjustment schemes for different deviations in the top width specification of rails are formed. An empirical model library is constructed, and the corresponding adjustment scheme is automatically retrieved for real-time top width deviations, thereby achieving precise control of the top width specification. This effectively ensures stable rolling while improving the control accuracy of the top width of rails, enhancing the timeliness of adjustment and the standardization of rolling adjustment. It solves the problems of low efficiency and numerous errors in manual adjustment, and effectively reduces the fluctuation of the top width specification of products.

[0006] According to one aspect of the present invention, a method for adjusting the top width of a rail is provided, comprising the following steps: S1, obtaining top width specification data based on production data, setting the measured value of the top width of the rail as X, and the standard value of the top width of the rail as X0; S2. Determine whether the dimensional deviation Δ between the measured value X and the standard value X0 is greater than the control deviation Δ0. If Δ = |X - X0| > Δ0, adjust the top width. S3. Determine the adjustment values ​​Δ and Δ0, where Δ - Δ0 = adjustment value, and determine the corresponding adjustment scheme based on the adjustment value.

[0007] According to one embodiment of the present invention, the UF horizontal roller is adjusted when the adjustment value is within the adjustment range of 0.1mm to 0.2mm.

[0008] According to one embodiment of the present invention, when the top width specification is less than the lower limit of the standard value by 0.1~0.2mm, the roll gap is increased by 0.1~0.2mm by adjusting the first pass horizontal roll of UF.

[0009] According to one embodiment of the present invention, when the top width specification is greater than the lower limit of the standard value by 0.1~0.2mm, the roll gap is reduced by 0.1~0.2mm by adjusting the first pass horizontal roller of UF.

[0010] According to one embodiment of the present invention, when the adjustment value is within the adjustment range of 0.3mm to 0.4mm, the UF horizontal roller, the U2 head vertical roller and the E2 horizontal roller are adjusted.

[0011] According to one embodiment of the present invention, when the upper width specification is less than the lower limit of the standard value by 0.3~0.4mm, the roll gap of the head vertical roller of the first pass of U2 is reduced by 0.2mm, the roll gap of the horizontal roller of the first pass of E2 is increased by 0.2~0.3mm, and the roll gap of the horizontal roller of the first pass of UF is increased by 0.1~0.2mm.

[0012] According to one embodiment of the present invention, when the upper width specification is greater than the lower limit of the standard value by 0.3~0.4mm, the roll gap of the head vertical roller of the first pass of U2 is increased by 0.2mm, the roll gap of the horizontal roller of the first pass of E2 is decreased by 0.2~0.3mm, and the roll gap of the horizontal roller of the first pass of UF is decreased by 0.1~0.2mm.

[0013] According to one embodiment of the present invention, when the adjustment value is within the adjustment range of 0.5mm to 0.6mm, the UF horizontal roller, the U2 head vertical roller, the E2 horizontal roller and the UR1 head vertical roller are adjusted.

[0014] According to one embodiment of the present invention, when the upper width specification is less than the lower limit of the standard value by 0.5~0.6mm, the roll gap of the head vertical rollers of U1 in the 1st, 2nd and 3rd passes is increased by 0.3~0.5mm, the roll gap of the head vertical rollers of U2 in the 1st pass is decreased by 0.2mm, the roll gap of the horizontal rollers of E2 in the 1st pass is increased by 0.3mm, and the roll gap of the horizontal rollers of UF in the 1st pass is increased by 0.3~0.4mm.

[0015] According to one embodiment of the present invention, when the upper width specification is greater than the lower limit of the standard value by 0.5~0.6mm, the roll gap of the head vertical rolls of U1 in the 1st, 2nd and 3rd passes is reduced by 0.3~0.5mm, the roll gap of the head vertical roll of U2 in the 1st pass is increased by 0.2mm, the roll gap of the horizontal roll of E2 in the 1st pass is reduced by 0.3mm, and the roll gap of the horizontal roll of UF in the 1st pass is reduced by 0.3~0.4mm.

[0016] In a method for adjusting the top width of a rail according to an embodiment of the present invention, based on experience extraction, adjustment schemes for different deviations in the top width specification of the rail are formed, an experience model library is constructed, and the corresponding adjustment scheme is automatically retrieved for real-time top width deviation, so as to achieve precise control of the top width specification. This effectively ensures stable rolling while improving the control accuracy of the top width of the rail, improves the timeliness of adjustment and the standardization of rolling adjustment, solves the problems of low efficiency and many errors in manual adjustment, and effectively reduces the fluctuation of the top width specification of the product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation examples of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A process flow diagram of the universal rolling process for rail profiles in the prior art is shown; Figure 2 A process flow diagram of a method for adjusting the top width of a rail according to an exemplary embodiment of the present invention is shown; Figure 3 A schematic diagram showing the cross-section and top width of the rail is provided. Figure 4 A diagram illustrating the hole type for an adjustment scheme where the top width of a 60kg / m tube exceeds the specification by 0.1mm to 0.2mm, according to an exemplary embodiment of the present invention; Figure 5 A diagram illustrating the hole pattern for an adjustment scheme where the top width of a 60kg / m tube exceeds the specification by 0.3mm to 0.4mm, according to an exemplary embodiment of the present invention; Figure 6A diagram illustrating the hole pattern for an adjustment scheme where the top width of a 60kg / m tube exceeds the specification by 0.5mm to 0.6mm, according to an exemplary embodiment of the present invention. Detailed Implementation

[0019] The following detailed description of the embodiments is intended to exemplify the principles of the present invention, but should not be construed as limiting the scope of the invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0021] It should be noted that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] It should also be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0023] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] like Figure 2 As shown, the present invention provides a method for adjusting the top width of a rail, which includes the following steps: S1, obtaining the top width specification data according to production data, setting the measured value of the top width of the rail to X, and the standard value of the top width of the rail to X0; S2. Determine whether the dimensional deviation Δ between the measured value X and the standard value X0 is greater than the control deviation Δ0. If Δ = |X - X0| > Δ0, adjust the top width. S3. Determine the adjustment values ​​Δ and Δ0, where Δ - Δ0 = adjustment value, and determine the corresponding adjustment scheme based on the adjustment value.

[0026] In the method for adjusting the top width of rails according to an embodiment of the present invention, based on experience extraction, adjustment schemes for different deviations in the top width specifications of rails are formed, an experience model library is constructed, and the corresponding adjustment scheme is automatically retrieved for real-time top width deviations, so as to achieve precise control of the top width specifications. This effectively ensures stable rolling while improving the control accuracy of the top width of rails, improves the timeliness of adjustment and the standardization of rolling adjustment, solves the problems of low efficiency and many errors in manual adjustment, and effectively reduces the fluctuation of the top width specifications of products.

[0027] like Figure 3 As shown, the top width of the rail cross-section consists of two parts: top width = tread surface + arc. In actual production, adjusting the top width of the rail mainly involves controlling the plasticity of the metal by adjusting the horizontal rollers and adjusting the head rollers to reduce / increase the incoming metal at the head, thereby controlling the top width of the rail.

[0028] To obtain the head width specification data, a historical ranking table of head width specification control is compiled based on the production control data of each work group, and the best work group is selected as the subject of expert knowledge extraction; based on the specification deviation value, the optimal adjustment plan is formed in combination with expert experience, and an experience data model for head width specification control is established; the actual specification is tested and compared with the standard value, and the adjustment plan is retrieved from the experience database based on the deviation value and then issued.

[0029] The production line is a semi-universal production line, including equipment UR1, E1, UR2, E2 and UF. Among them, UR1 and UR2 are universal rolling mills, and UF is a semi-universal rolling mill.

[0030] The purpose of the adjustment is to adjust the production situation to ensure that steel output, rolling force, temperature, rolling speed, and temperature are all normal.

[0031] In some specific embodiments, the UF horizontal rolls are adjusted when the adjustment value is within the adjustment range of 0.1mm to 0.2mm. As the main part of achieving the final rolling of rails, the UF rolling mill (semi-universal mill) has the most significant impact on the adjustment of specifications and dimensions when equipped with finished pass patterns for corresponding roll gap adjustments. Figure 4 The image shows the change in specifications of the rolled piece due to UF roll gap reduction.

[0032] Based on the above embodiments, when the top width specification is less than the lower limit of the standard value by 0.1~0.2mm, the roll gap is increased by 0.1~0.2mm by adjusting the first pass horizontal roller of UF.

[0033] Based on the above embodiments, when the top width specification is greater than the lower limit of the standard value by 0.1~0.2mm, the roll gap is reduced by 0.1~0.2mm by adjusting the first pass horizontal roller of UF.

[0034] Applying pressure to the UF horizontal roller causes the head metal to flow towards the transverse centerline and the web metal to flow to both sides, thereby increasing the dimensions of rail height and rail crown fullness, and decreasing the dimensions of web thickness. Releasing the UF roller has the opposite effect of applying pressure.

[0035] Specifically, when the top width specification is less than the standard lower limit of 0.1mm, adjusting the UF first pass horizontal roller to increase the roller gap by 0.1mm can increase the top width by 0.1mm, increase the web thickness by 0.1mm, and decrease the rail height by 0.1mm. When the top width specification is less than the standard lower limit of 0.2mm, the roll gap can be increased by 0.2mm by adjusting the horizontal roller of the first pass of UF, which can increase the top width by 0.2mm, increase the web thickness by 0.2mm, and decrease the rail height by 0.2mm. When the top width exceeds the standard limit by 0.1mm, adjusting the first pass of the UF horizontal roller to reduce the roll gap by 0.1mm can reduce the top width by 0.1mm, reduce the web thickness by 0.1mm, and increase the rail height by 0.1mm. When the top width exceeds the standard limit by 0.2mm, adjusting the first pass of the UF horizontal roller to reduce the roll gap by 0.2mm can reduce the top width by 0.2mm, the web thickness by 0.2mm, and increase the rail height by 0.2mm.

[0036] In some specific embodiments, when the adjustment value is within the adjustment range of 0.3mm to 0.4mm, adjustments are made to the UF horizontal roll, U2 head vertical roll, and E2 horizontal roll. For cases where the top width specification exceeds the standard, adjusting only the UF horizontal roll is feasible but unreasonable, as it will cause large fluctuations in the UF horizontal roll rolling force and result in bent steel output. Therefore, a more reasonable adjustment approach is: first, adjust and reduce the roll gap value of the UR2 head vertical roll to change the horizontal and vertical widening and longitudinal extension of the metal at the top of the rail head towards both sides; then, adjust and reduce the roll gap of the E2 (two-roll mill) horizontal roll to extend the metal with more material coming into the rail head; finally, adjust the roll gap value of the UF finished product hole horizontal roll to achieve a balanced rolling force while ensuring that the top width specification meets the standard. Figure 5 The diagram shows the changes in specifications and their impact after adjustment. If the top width specification is lower than the standard, the adjustment approach is the opposite of the adjustment for exceeding the standard.

[0037] Based on the above embodiments, when the upper width specification is less than the lower limit of the standard value by 0.3~0.4mm, reduce the head vertical roller gap of U2 first pass by 0.2mm, increase the horizontal roller gap of E2 first pass by 0.2~0.3mm, and increase the horizontal roller gap of UF first pass by 0.1~0.2mm.

[0038] Based on the above embodiments, when the upper width specification is greater than the lower limit of the standard value by 0.3~0.4mm, increase the head vertical roller gap of U2 first pass by 0.2mm, decrease the horizontal roller gap of E2 first pass by 0.2~0.3mm, and decrease the horizontal roller gap of UF first pass by 0.1~0.2mm.

[0039] Adjusting the roll gap value of the UR2 head vertical roll changes the flow of metal at the top of the rail head, affecting the rail height and rail crown fullness specifications. Adjusting the roll gap value of the E2 (two-roll mill) horizontal roll changes the flow of metal at the bottom, waist, and head, affecting the bottom width, waist thickness, and head width specifications. Adjusting the roll gap value of the UF horizontal roll directly changes the flow of head metal towards the transverse centerline and the flow of waist metal towards both sides, affecting the rail height, waist thickness, and rail crown fullness specifications.

[0040] Specifically, when the top width specification is less than the standard lower limit of 0.3mm, reducing the head vertical roller gap of the first pass of U2 by 0.2mm, increasing the horizontal roller gap of the first pass of E2 by 0.2mm, and increasing the horizontal roller gap of the first pass of UF by 0.1mm can increase the top width by 0.3mm, increase the web thickness by 0.2mm, and decrease the rail height by 0.3mm. When the top width specification is less than the standard lower limit of 0.4mm, reduce the head vertical roller gap of U2 first pass by 0.2mm, increase the horizontal roller gap of E2 first pass by 0.3mm, and increase the horizontal roller gap of UF first pass by 0.2mm. This can increase the top width by 0.4mm, increase the web thickness by 0.3mm, and decrease the rail height by 0.4mm. When the top width exceeds the standard limit by 0.3mm, increase the head vertical roller gap of U2 first pass by 0.2mm, decrease the horizontal roller gap of E2 first pass by 0.2mm, and decrease the horizontal roller gap of UF first pass by 0.1mm. This can reduce the top width by 0.3mm, reduce the web thickness by 0.2mm, and increase the rail height by 0.3mm. When the top width exceeds the standard limit by 0.4mm, increase the head vertical roller gap of U2 first pass by 0.2mm, decrease the horizontal roller gap of E2 first pass by 0.3mm, and decrease the horizontal roller gap of UF first pass by 0.2mm. This can reduce the top width by 0.4mm, reduce the web thickness by 0.3mm, and increase the rail height by 0.4mm.

[0041] In some specific embodiments, when the adjustment value is within the adjustment range of 0.5mm to 0.6mm, the UF horizontal roller, U2 head vertical roller, E2 horizontal roller and UR1 head vertical roller are adjusted.

[0042] like Figure 6 As shown, to address the issue of severely non-compliant head width specifications, in addition to the 0.3mm~0.4mm adjustment scheme, the roll gap values ​​of the head vertical rolls in the three UR1 passes need to be adjusted. This, combined with the UR2 head vertical roll adjustment, forms a combined adjustment. The principle is that by adjusting UR1 and UR2 in the same direction, the metal in the rolled piece is made to achieve uniform widening and extension between the two stands, thus achieving a reasonable head width metal content. Then, the roll gap values ​​of the E2 (two-roll mill) and UF (semi-universal mill) horizontal rolls are adjusted accordingly to balance the rolling force of the rolls while adjusting the head width specifications.

[0043] Based on the above embodiments, when the upper width specification is less than the lower limit of the standard value by 0.5~0.6mm, increase the roll gap of the head vertical rollers of U1 in the 1st, 2nd and 3rd passes by 0.3~0.5mm, decrease the roll gap of the head vertical rollers of U2 in the 1st pass by 0.2mm, increase the roll gap of the horizontal rollers of E2 in the 1st pass by 0.3mm, and increase the roll gap of the horizontal rollers of UF in the 1st pass by 0.3~0.4mm.

[0044] Based on the above embodiments, when the upper width specification is greater than the lower limit of the standard value by 0.5~0.6mm, reduce the roll gap of the head vertical rollers of U1 in the 1st, 2nd and 3rd passes by 0.3~0.5mm, increase the roll gap of the head vertical rollers of U2 in the 1st pass by 0.2mm, reduce the roll gap of the horizontal rollers of E2 in the 1st pass by 0.3mm, and reduce the roll gap of the horizontal rollers of UF in the 1st pass by 0.3~0.4mm.

[0045] After adjustment, the roll gap values ​​of the head vertical rolls of UR1 and UR2 are not consistent. The roll gap value of UR1 remains unchanged, while the roll gap value of UR2 is reduced. This will increase the resistance to plastic deformation of the head metal when the metal of UR2 is deformed, and the head width value will increase. However, the influence of the rail height caused by the adjustment of UR1 and UR2 can be offset by matching the roll gap value of E2 horizontal roll with the roll gap value of UF horizontal roll. Thus, only the specifications of rail crown fullness and web thickness are affected, and the head width dimension meets the requirements.

[0046] Specifically, when the top width specification is less than the standard lower limit of 0.5mm, increase the roll gap of the head vertical rolls of U1 in the 1st, 2nd and 3rd passes by 0.3mm, decrease the roll gap of the head vertical rolls of U2 in the 1st pass by 0.2mm, increase the roll gap of the horizontal rolls of E2 in the 1st pass by 0.3mm, and increase the roll gap of the horizontal rolls of UF in the 1st pass by 0.3mm. This can increase the top width by 0.5mm, increase the web thickness by 0.3mm, and increase the rail crown fullness by 0.4mm. When the top width specification is less than the standard lower limit of 0.6mm, increase the roll gap of the head vertical rolls of U1 in the 1st, 2nd and 3rd passes by 0.5mm, decrease the roll gap of the head vertical rolls of U2 in the 1st pass by 0.2mm, increase the roll gap of the horizontal rolls of E2 in the 1st pass by 0.3mm, and increase the roll gap of the horizontal rolls of UF in the 1st pass by 0.4mm. This can increase the top width by 0.6mm, increase the web thickness by 0.4mm, and increase the fullness of the rail crown by 0.5mm. When the top width exceeds the standard limit by 0.5mm, reduce the roll gap of the head vertical rolls of U1 in the 1st, 2nd and 3rd passes by 0.3mm, increase the roll gap of the head vertical rolls of U2 in the 1st pass by 0.2mm, reduce the roll gap of the horizontal rolls of E2 in the 1st pass by 0.3mm, and reduce the roll gap of the horizontal rolls of UF in the 1st pass by 0.3mm. This can reduce the top width by 0.5mm, the web thickness by 0.3mm, and the rail crown fullness by 0.4mm. When the top width exceeds the standard limit by 0.6mm, reduce the roll gap of the head vertical rolls of U1 in the 1st, 2nd and 3rd passes by 0.5mm, increase the roll gap of the head vertical rolls of U2 in the 1st pass by 0.2mm, reduce the roll gap of the horizontal rolls of E2 in the 1st pass by 0.3mm, and reduce the roll gap of the horizontal rolls of UF in the 1st pass by 0.4mm. This can reduce the top width by 0.6mm, the web thickness by 0.4mm, and the rail crown fullness by 0.5mm.

[0047] The implementation of this application scheme is illustrated below using a 60-track heavy rail system as an example: Step 1: Obtain the specifications and dimensions of the rail and determine whether the width of the rail needs to be adjusted.

[0048]

[0049] Step 2: Input the sampling data. The remaining specifications are in the standard internal control. The specification size that needs to be reduced by 0.2mm in the top width needs to be calculated. Click Calculate to generate the solution: Press down the UF first pass horizontal roller gap by 0.2mm. The impact value is: increase the rail height by 0.1mm and decrease the web thickness by 0.1mm.

[0050] Step 3: Distribute the model calculation plan, modify the actual roll gap value, and then sample the next one.

[0051]

[0052] Step 4: Analysis of the adjusted sampled data: The issued plan has a significant change in the specifications of the top width, and the impact on the specifications of the waist thickness and rail height is also consistent with the trend of the plan's deduction.

[0053] After the implementation of this invention, a comprehensive and precise set of adjustment strategies has been formed. These strategies are specifically designed to address various deviations in the top width specifications of rails during the production process. They integrate advanced data processing and intelligent analysis technologies to build an efficient and reliable experience model library. When a deviation in the top width of the rails is detected in real time on the production line, the system will respond quickly and automatically retrieve the adjustment scheme that best matches the current deviation from the model library.

[0054] This process significantly shortens response time, enabling real-time and precise control of the rail head width specification, effectively ensuring stable rolling conditions on the production line. This automated adjustment mechanism significantly improves the control accuracy of the rail head width, resulting in more stable and reliable product quality. It not only reduces adjustment errors caused by human factors but also significantly improves the timeliness of adjustments by optimizing the adjustment process, ensuring a tight and efficient production rhythm.

[0055] The implementation of standardized adjustment plans has greatly improved the standardization of steel rolling adjustments, bringing greater transparency and traceability to production management. At the same time, it has promoted the digital and intelligent transformation of the production process, injecting new vitality into the sustainable development of the steel industry. The above are exemplary embodiments disclosed in this invention. The order of the disclosed embodiments is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. However, it should be noted that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the disclosed embodiments of this invention (including the claims) is limited to these examples. Various changes and modifications can be made without departing from the scope defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular.

[0056] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method for adjusting the width of the top edge of a rail, characterized in that, Includes the following steps: S1. Obtain the top width specification data based on the production data, set the actual value of the top width of the rail to X, and the standard value of the top width of the rail to X0. S2. Determine whether the dimensional deviation Δ between the measured value X and the standard value X0 is greater than the control deviation Δ0. When Δ=|X-X0|>Δ0, it is determined that the top width needs to be adjusted. S3. Determine the adjustment value: Δ-Δ0=adjustment value, and determine the corresponding adjustment plan based on the adjustment value; Specifically, when the measured value is greater than the standard value, the control deviation adopts the upper deviation; when the measured value is less than the standard value, the control deviation adopts the lower deviation. When the adjustment value is within the adjustment range of 0.1mm to 0.2mm, the UF horizontal roll of the semi-universal rolling mill is adjusted. When the adjustment value is within the adjustment range of 0.3mm to 0.4mm, the UF horizontal roll of the semi-universal rolling mill, the head vertical roll of the UR2 universal rolling mill, and the E2 horizontal roll of the two-roll rolling mill are adjusted. When the adjustment value is within the adjustment range of 0.5mm to 0.6mm, the UF horizontal roll of the semi-universal rolling mill, the head vertical roll of the UR2 universal rolling mill, the E2 horizontal roll of the two-roll mill, and the head vertical roll of the UR1 universal rolling mill are adjusted.

2. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.1~0.2mm smaller than the lower limit of the standard value, the roll gap is increased by 0.1~0.2mm by adjusting the horizontal roll of the first pass of the semi-universal rolling mill; wherein, the lower limit of the standard value = standard value - lower deviation.

3. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.1~0.2mm larger than the upper limit of the standard value, the roll gap is reduced by 0.1~0.2mm by adjusting the horizontal roll of the first pass of the semi-universal rolling mill UF; wherein, the upper limit of the standard value = the standard value + the upper deviation.

4. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.3~0.4mm smaller than the lower limit of the standard value, reduce the head vertical roll gap of the first pass of the universal mill UR2 by 0.2mm, increase the horizontal roll gap of the first pass of the two-roll mill E2 by 0.2~0.3mm, and increase the horizontal roll gap of the first pass of the semi-universal mill UF by 0.1~0.2mm; wherein, the lower limit of the standard value = standard value - lower deviation.

5. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.3~0.4mm larger than the upper limit of the standard value, increase the head vertical roll gap of the first pass of the universal mill UR2 by 0.2mm, decrease the horizontal roll gap of the first pass of the two-roll mill E2 by 0.2~0.3mm, and decrease the horizontal roll gap of the first pass of the semi-universal mill UF by 0.1~0.2mm; wherein, the upper limit of the standard value = standard value + upper deviation.

6. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.5~0.6mm smaller than the lower limit of the standard value, increase the roll gap of the head vertical rolls of the first, second and third passes of the universal mill UR1 by 0.3~0.5mm, decrease the roll gap of the head vertical rolls of the first pass of the universal mill UR2 by 0.2mm, increase the roll gap of the horizontal rolls of the first pass of the two-roll mill E2 by 0.3mm, and increase the roll gap of the horizontal rolls of the first pass of the semi-universal mill UF by 0.3~0.4mm; wherein, the lower limit of the standard value = standard value - lower deviation.

7. The method for adjusting the width of the rail head according to claim 1, characterized in that, When the measured value is 0.5~0.6mm larger than the upper limit of the standard value, reduce the roll gap of the head vertical rolls of the first, second and third passes of the universal mill UR1 by 0.3~0.5mm, increase the roll gap of the head vertical rolls of the first pass of the universal mill UR2 by 0.2mm, reduce the roll gap of the horizontal rolls of the first pass of the two-roll mill E2 by 0.3mm, and reduce the roll gap of the horizontal rolls of the first pass of the semi-universal mill UF by 0.3~0.4mm; wherein, the upper limit of the standard value = the standard value + the upper deviation.

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