Tension compensation method and system for cold-hot slab alternate rolling

Abstract

The present application relates to a kind of tension compensation method and system of hot and cold blank alternative rolling, belong to the technical field of rolling steel.The method includes: obtaining the specification information g of blank by input blank specification, and obtaining blank data according to preset detection equipment;Specification information g and blank data are packed into the identity information of blank, and sent to computing module;Computing module receives the identity information of blank, and obtains the actual compensation coefficient K of blank by preset computing method 实 ;Receive the actual compensation coefficient K 实 Output by computing module, and control rolling mill according to actual compensation coefficient K 实 Tension compensation is implemented to blank.The present application solves the technical problem that there is still a big difference in finished product size after using uniform tension compensation value to blank during hot and cold blank alternative rolling, and the difference of single negative difference rate of hot and cold blank is big.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel rolling, in particular to a tension compensation method and system for cold-hot billet alternate rolling. BACKGROUND

[0002] In the process of steel rolling, due to the mismatch between the machine time output of different varieties and the tapping output of steelmaking, the failure of the transport roller, the failure of tapping in the previous process, and the process replacement in the current process, the hot supply cannot continue, and cold billets need to be mixed to ensure the continuation of production. In the process of cold-hot billet alternate rolling, due to the difference in physical properties of cold and hot billets, tension compensation is needed for cold billets. The role of tension compensation is to adjust and control the tension so that it remains within a stable and appropriate range, thereby ensuring the stability of the rolling process and the uniformity of product quality.

[0003] However, when using the existing method for tension compensation in cold-hot billet alternate production, the enterprise can only set a uniform tension compensation value for all cold billets. However, during rolling, not only is the deformation resistance different compared to hot billets, but also between each cold billet due to factors such as temperature at tapping and heating time in the furnace, which can cause tension fluctuations during rolling. After using a uniform tension compensation value, there are still significant differences in the size of the finished product, which affects the stable control of the negative difference rate of the finished product. The single negative difference rate of cold and hot billets is as high as 0.5%-1%, increasing the processing cost of steel rolling and leading to a decline in enterprise efficiency. SUMMARY

[0004] The purpose of the present application is to provide a tension compensation method and system for cold-hot billet alternate rolling, which solves the technical problem of large differences in the size of the finished product after using a uniform tension compensation value for the billet during cold-hot billet alternate rolling, and a large difference in the single negative difference rate of cold and hot billets.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] In the first aspect, the present application provides a tension compensation method for cold-hot billet alternate rolling, which comprises the following steps:

[0007] Obtain the specification information g of the billet by inputting the specification of the billet, and obtain the billet data according to the preset detection equipment; the billet data at least includes: the tapping temperature data w, the tapping time data T 入 , the tapping time data T 出 ; pack the specification information g and the billet data into the identity information of the billet, and send it to the calculation module; the calculation module receives the identity information of the billet, and obtains the actual compensation coefficient K 实 of the billet through the preset calculation method; the rolling mill controls the tension compensation of the billet according to the actual compensation coefficient K 实 .

[0008] Furthermore, the calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient K using a preset calculation method. 实 Specifically, this includes: based on the standard compensation coefficient K 标 The sum and difference temperature coefficient K is determined by a preset mathematical formula K. 实 =K 标 ×K, to obtain the actual compensation coefficient K 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 The correction factor.

[0009] Furthermore, the calculation module also receives the variety coefficient K. 品 The preset calculation method is: based on the standard compensation coefficient K 标 Temperature difference coefficient K and variety coefficient K 品 Through the preset mathematical formula K 实 =K 标 ×K×K 品 The actual compensation coefficient K is obtained. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 Correction coefficient, variety coefficient K 品 The setting is based on the type of billet.

[0010] Furthermore, the temperature difference coefficient K is obtained through formula (1):

[0011]

[0012] Where t = T 出 -T 入 W 标 The preset standard temperature value, T 标 Δw is the preset standard furnace time value, Δt is the preset unit temperature difference value, and Δt is the preset unit time difference value.

[0013] Furthermore, the standard compensation coefficient K 标 The specified information g is read from the preset storage module.

[0014] In a second aspect, the present invention provides a tension compensation system for alternating hot and cold billet rolling, comprising:

[0015] The data acquisition module obtains the billet specification information g based on the input billet specifications and acquires billet data according to preset testing equipment; the billet data includes at least: temperature data w, furnace loading time data T. 入 Furnace time data T 出The data sending module packages the specification information g and billet data into billet identification information and sends it to the calculation module. The calculation module receives the billet identification information and obtains the actual compensation coefficient K of the billet using a preset calculation method. 实 The control module controls the rolling mill according to the actual compensation coefficient K. 实 Tension compensation is applied to the billet.

[0016] Furthermore, the calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient K using a preset calculation method. 实 Specifically, this includes: through a preset mathematical formula K 实 =K 标 ×K, based on the standard compensation coefficient K 标 The actual compensation coefficient K is obtained from the sum of the temperature difference coefficient K and the temperature difference coefficient K. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 The correction factor.

[0017] Furthermore, the calculation module also receives the variety coefficient K. 品 The preset calculation method is: based on the standard compensation coefficient K 标 Temperature difference coefficient K and variety coefficient K 品 Through the preset mathematical formula K 实 =K 标 ×K×K 品 The actual compensation coefficient K is obtained. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 Correction coefficient, variety coefficient K 品 The setting is based on the type of billet.

[0018] Furthermore, the temperature difference coefficient K is obtained through formula (1):

[0019]

[0020] Where t = T 出 -T 入 W 标 The preset standard temperature value, T 标 Δw is the preset standard furnace time value, Δt is the preset unit temperature difference value, and Δt is the preset unit time difference value.

[0021] Furthermore, the standard compensation coefficient K 标 The specified information g is read from the preset storage module.

[0022] The beneficial effects of the present application: for the existing method, when the cold and hot blanks are alternately produced, the enterprise sets a unified tension compensation value for all cold blanks, but due to the temperature when the blank is discharged, the heating time in the furnace and other factors, the tension fluctuation in the rolling process leads to the difference in the size of the finished product, thereby affecting the stable control of the negative difference rate of the finished product. The present application collects various parameters of each blank, modifies the tension compensation parameters accordingly, realizes the differentiated tension compensation operation of the blank, further reduces the difference in the size of the finished product, reduces the difference in the negative difference rate of the finished product, reduces the cost of rolling steel, ensures the improvement of enterprise benefits, and solves the technical problems that after the unified tension compensation value is used for the blank during the cold and hot blank alternating rolling, the finished product size still has a large difference, and the difference in the negative difference rate of the cold and hot blanks is large.

[0023] These and other objects, features, and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are intended to provide further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A flow chart of a tension compensation method for cold and hot blank alternating rolling provided by the present application is shown.

[0026] Figure 2 A correspondence graph of specification information in the preset storage module and rolling mill standard compensation coefficients in an embodiment of the present application is shown.

[0027] Figure 3 A module diagram of a tension compensation system for cold and hot blank alternating rolling provided by the present application is shown. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only used as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0029] Those skilled in the art should understand that in the disclosure of the specification, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or equipment including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or equipment. Therefore, the above terms cannot be understood as a limitation of the present application.

[0030] It should be noted that the terms "first", "second" in the present application are only for descriptive purposes and do not indicate any order or relative importance. These terms can be interpreted as names.

[0031] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0032] The present application provides a tension compensation method and system for cold and hot blank alternating rolling, to solve the technical problems that after using a unified tension compensation value for the blank during cold and hot blank alternating rolling, there is still a large difference in the size of the finished product, and the single negative difference rate of cold and hot blanks is large.

[0033] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] Figure 1 A flow chart of a tension compensation method for cold and hot blank alternating rolling is provided for the present embodiment. As shown in Figure 1 The present embodiment provides a tension compensation method for cold and hot blank alternating rolling, comprising the following steps:

[0035] Step 1: Obtain the specification information g of the blank through the input blank specification, and obtain the blank data according to the preset detection equipment.

[0036] Specifically, the blank data at least includes: temperature data w, furnace entry time data T 入 , and furnace exit time data T 出 .

[0037] Specifically, a temperature sensor is arranged before the rolling mill to detect the temperature data w of the blank before entering the rolling mill.

[0038] Specifically, time monitoring devices are arranged at the inlet and outlet of the heating furnace respectively to obtain the furnace entry time data T 入 of the blank entering the heating furnace and the furnace exit time data T 出 of the blank exiting the heating furnace.

[0039] Step 2: Package the specification information g and the billet data into the billet's identity information and send it to the calculation module.

[0040] Step 3: The calculation module receives the identity information and obtains the actual compensation coefficient K of the billet using a preset calculation method. 实 .

[0041] In Example 1, the preset mathematical formula K is used. 实 =K 标 ×K, according to the standard compensation coefficient K 标 The actual compensation coefficient K is obtained by combining the temperature difference coefficient K with the actual temperature difference coefficient K. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 The correction factor.

[0042] The temperature difference coefficient K is obtained by formula (1):

[0043]

[0044] Where t = T 出 -T 入 W 标 The preset standard temperature value, T 标 Δw is the preset standard furnace time value, Δt is the preset unit temperature difference value, and Δt is the preset unit time difference value.

[0045] Preset standard furnace temperature W 标 The temperature is 350 degrees Celsius, and the standard furnace time is T. 标 The time difference is 87 minutes, the unit temperature difference Δw is 35 degrees Celsius, and the unit time difference Δt is 5 minutes.

[0046] When the furnace temperature of a billet is w = 175 degrees Celsius and the heating time is t = 87 minutes, the calculation device calculates the temperature difference coefficient of the billet using the above formula.

[0047] Specifically, the standard compensation coefficient K 标 The specified information g is read from the preset storage module.

[0048] Figure 2 This is a diagram showing the correspondence between specification information and rolling mill standard compensation coefficients within a preset storage module in one embodiment. For example... Figure 2 As shown, in one embodiment, the standard compensation coefficient K is preset for 12 specifications of a certain type of billet on a 2V rolling mill. 标 -0.10% is the preset standard compensation coefficient K for 14 specifications of the certain type of billet. 标The value is -0.12%, which is the preset standard compensation coefficient K for 18 specifications of the certain type of billet. 标 The value is -0.15%. It should be noted that the specifications mentioned are related to the rolling mill standard compensation coefficient K. 标 The corresponding relationships are set by each manufacturer based on practical experience in steel rolling production.

[0049] Based on the specification information g, the standard compensation coefficient K for this billet in the No. 1 rolling mill is read from the preset module. 标1 = -0.1%, the calculation device calculates the actual compensation coefficient K of the billet on the No. 1 rolling mill using the above mathematical formula. 实1 = -0.1% × 0.5 = -0.05%.

[0050] In other words, the compensation coefficient originally applied to the billet by the No. 1 rolling mill was the standard compensation coefficient K. 标1 = -0.1%, while the standard compensation coefficient K is obtained by adjusting the temperature difference coefficient K1 of the billet. 标1 After correction calculations, the actual compensation coefficient K for the billet by the No. 1 rolling mill is... 实1 The value is -0.05%, which means that 50% of the original tension compensation coefficient has been applied.

[0051] Furthermore, in Embodiment 2, the calculation module also receives the variety coefficient K. 品 The preset calculation method is as follows: based on the standard compensation coefficient K 标 Temperature difference coefficient K and variety coefficient K 品 Through the preset mathematical formula K 实 =K 标 ×K×K 品 The actual compensation coefficient K is obtained. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 The correction factor, the variety coefficient K 品 The variety coefficient K is set according to the type of billet. In this embodiment, the variety coefficient K is... 品 The default value is 1. It should be noted that when steel billets with higher hardness become available in the future, new grade coefficients will be formulated based on experience in production practice.

[0052] The temperature difference coefficient K is obtained by formula (1):

[0053]

[0054] Where t = T 出 -T 入 W 标 The preset standard temperature value, T 标W is a preset standard in-furnace temperature value, Δw is a preset unit temperature difference value, and Δt is a preset unit time difference value.

[0055] W is a preset standard in-furnace temperature value, Δw is a preset unit temperature difference value, and Δt is a preset unit time difference value. 标 T is 350 (degrees Celsius), and Δt is 87 (minutes). 标 T is 350 (degrees Celsius), and Δt is 87 (minutes).

[0056] When the in-furnace temperature w of a billet is 175 (degrees) and the heating time t is 97 (minutes), the temperature difference coefficient K2 of the billet is calculated by the above mathematical formula.

[0057] The standard compensation coefficient K of the billet in the 1# rolling mill is read from the preset module according to the specification information g. 标 When the actual compensation coefficient K of the billet is -0.1%, the actual compensation coefficient K of the billet is calculated by the above mathematical formula. 实2 = -0.1% x 0.3 x 1 = -0.03%.

[0058] That is, the compensation coefficient of the 1# rolling mill for the billet is the standard compensation coefficient K 标2 = -0.1%, and the actual compensation coefficient K 标2 of the 2# rolling mill for the billet is calculated by correcting the standard compensation coefficient K 实2 = -0.03%, that is, only 30% of the original tension compensation coefficient is implemented.

[0059] Step 4: The rolling mill implements tension compensation on the billet according to the actual compensation coefficient K 实 .

[0060] Specifically, the standard compensation coefficient K 标 and the actual compensation coefficient K 实 are percentage coefficients for adjusting the speed of the rolling mill equipment to adjust the tension of the billet. A positive compensation coefficient indicates that the equipment is accelerated, and a negative compensation coefficient indicates that the equipment is decelerated. In Example One, the original standard compensation coefficient K 标1 = -0.1% is implemented by the 1# rolling mill, and the actual compensation coefficient K 实1 = -0.05% is calculated in the 1# rolling mill, so the actual compensation coefficient K 实1 = -0.05% is actually implemented by the 1# rolling mill, and the operating speed of the 1# rolling mill is reduced from the original 800 rpm to 799.6 rpm. In Example Two, the original standard compensation coefficient K 标2 = -0.1% is implemented by the 1# rolling mill, and the actual compensation coefficient K 实2= -0.03%, then the actual implementation of the 1# rolling mill is the actual compensation coefficient K 实2 , the operation speed of the 1# rolling mill is reduced from 800 rpm to 799.76 rpm.

[0061] In the prior art, different rolling mills set different standard compensation coefficients K 标 for different specifications of the billets according to different processing equipment, processing billets and processing purposes. 标 In the present application, the standard compensation coefficient K 实 is corrected by setting a temperature difference coefficient K 实 , and the actual compensation coefficient K 入 is obtained by customizing compensation parameters according to the temperature data and furnace time data of each billet. 出 The actual compensation coefficient K 实 is used to adjust the tension of the billet to solve the technical problem that there is still a large difference in the size of the finished product after using a uniform tension compensation value for the billet when cold and hot billets are alternately rolled.

[0062] Further, when the preset compensation value correction switch of the rolling mill is in an automatic state, the rolling mill implements tension compensation on the billet according to the actual compensation coefficient K ; when the preset compensation value correction switch of the rolling mill is in a manual state, the rolling mill implements tension compensation on the billet according to the standard compensation coefficient K .

[0063] Figure 3 A module diagram of a tension compensation system for cold and hot billet alternate rolling is provided for the present embodiment. As shown in Figure 3 , the present embodiment provides a tension compensation system for cold and hot billet alternate rolling, comprising:

[0064] A data acquisition module acquires the specification information g of the billet through the input billet specification, and acquires the billet data according to the preset detection equipment; the billet data at least includes: temperature data w, furnace entry time data T 出 , and furnace exit time data T 实 .

[0065] A data sending module packages the specification information g and the billet data into the identity information of the billet, and sends it to a preset calculation module.

[0066] A calculation module receives the identity information of the billet, and obtains the actual compensation coefficient K 实 of the billet through a preset calculation method.

[0067] A control module controls the rolling mill to implement tension compensation on the billet according to the actual compensation coefficient K 实 .

[0068] Specifically, the calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient K using a preset calculation method. 实 Specifically, this includes: through a preset mathematical formula K 实 =K 标 ×K, based on the standard compensation coefficient K 标 The actual compensation coefficient K is obtained by combining the temperature difference coefficient K with the actual temperature difference coefficient K. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 The correction factor.

[0069] Furthermore, the calculation module also receives the variety coefficient K. 品 The preset calculation method is: based on the standard compensation coefficient K 标 Temperature difference coefficient K and variety coefficient K 品 Through the preset mathematical formula K 实 =K 标 ×K×K 品 The actual compensation coefficient K is obtained. 实 Wherein, the temperature difference coefficient K is the standard compensation coefficient K. 标 Correction coefficient, variety coefficient K 品 The setting is based on the type of billet.

[0070] Specifically, the temperature difference coefficient K is obtained by formula (1):

[0071]

[0072] Where t = T 出 -T 入 W 标 The preset standard temperature value, T 标 Δw is the preset standard furnace time value, Δt is the preset unit temperature difference value, and Δt is the preset unit time difference value.

[0073] Specifically, the standard compensation coefficient K 标 The specified information g is read from the preset storage module.

[0074] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments for IoT devices and media are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0075] The system and medium provided by the embodiments of the present application are one-to-one corresponding, and therefore, the system and medium also have similar beneficial technical effects to the method corresponding thereto. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the system and medium will not be described here again.

[0076] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. In addition, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0077] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus generate a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that carries out the functions specified in one or more blocks.

[0078] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0080] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memories.

[0081] Memory can include non-persistent memory, Random Access Memory (RAM), and / or non-volatile memory, such as Read Only Memory (ROM) or flash memory, in computer readable media. Memory is an example of computer readable media.

[0082] Computer readable media includes permanent and non-permanent, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer readable media does not include transitory media, such as modulated data signals and carrier waves.

[0083] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not include only those elements in the list, but can also include other elements not expressly listed or inherent to such process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0084] The above description is only some embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A tension compensation method for alternating hot and cold billet rolling, characterized in that, The method includes: The billet specification information g is obtained by inputting the billet specifications, and the billet data is obtained according to the preset detection equipment; the billet data includes at least: temperature data w, furnace loading time data. Baking time data ; The specification information g and the billet data are packaged into the billet's identity information and sent to the calculation module; The calculation module receives the identity information and obtains the actual compensation coefficient of the billet using a preset calculation method. ; The control mill is based on the actual compensation coefficient. Tension compensation is applied to the billet; The calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient using a preset calculation method. Specifically, it includes: According to the standard compensation coefficient The sum and difference temperature coefficient K is determined by a preset mathematical formula. The actual compensation coefficient is obtained. Wherein, the temperature difference coefficient K is the standard compensation coefficient. Correction factor; The temperature difference coefficient K is obtained by formula (1): （1） in, , The preset standard temperature value, The preset standard furnace time value, The preset unit temperature difference value, This is the preset unit time difference value; The standard compensation coefficient The specified information g is read from the preset storage module.

2. The tension compensation method for alternating hot and cold billet rolling as described in claim 1, characterized in that, The calculation module also receives variety coefficients. The preset calculation method is as follows: According to the standard compensation coefficient Temperature difference coefficient K and variety coefficient Through a pre-set mathematical formula The actual compensation coefficient is obtained. Wherein, the temperature difference coefficient K is the standard compensation coefficient. The correction factor, the variety coefficient The setting is based on the type of billet.

3. A tension compensation system for alternating hot and cold billet rolling, characterized in that, include: The data acquisition module obtains the specification information g of the billet through the input billet specifications, and acquires the billet data according to the preset detection equipment; The billet data includes at least: temperature data w, furnace loading time data. Baking time data ; The data sending module packages the specification information g and the billet data into the billet's identity information and sends it to the calculation module; The calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient using a preset calculation method. ; The control module controls the rolling mill to adjust the actual compensation coefficient. Tension compensation is applied to the billet; The calculation module receives the billet's identity information and obtains the billet's actual compensation coefficient using a preset calculation method. Specifically, it includes: According to the standard compensation coefficient The sum and difference temperature coefficient K is determined by a preset mathematical formula. The actual compensation coefficient is obtained. Wherein, the temperature difference coefficient K is the standard compensation coefficient. Correction factor; The temperature difference coefficient K is obtained by formula (1): （1） in, , The preset standard temperature value, The preset standard furnace time value, The preset unit temperature difference value, This is the preset unit time difference value; The standard compensation coefficient The specified information g is read from the preset storage module.

4. The tension compensation system for alternating hot and cold billet rolling as described in claim 3, characterized in that, The calculation module also receives variety coefficients. The preset calculation method is as follows: According to the standard compensation coefficient Temperature difference coefficient K and variety coefficient Through a pre-set mathematical formula The actual compensation coefficient is obtained. Wherein, the temperature difference coefficient K is the standard compensation coefficient. The correction factor, the variety coefficient The setting is based on the type of billet.

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