Working roll diameter data abnormity identification method and related equipment

Abstract

The invention discloses a working roll diameter data abnormity identification method and related equipment, and relates to the technical field of metallurgical production, and the method comprises the following steps: calculating a roll diameter deviation value based on working roll diameter data before replacement and working roll diameter data after replacement, the working roll diameter data comprises upper working roll diameter data and lower working roll diameter data; calculating a zero roll gap travel value based on a preset travel value and the roll diameter deviation value; calculating a roll gap stroke value based on the zero roll gap stroke value and the roll gap deviation value; determining a judgment result based on the roll gap travel value, the actual travel value, the actual contact force, the preset contact force and the preset time; and under the condition that the judgment result is normal, the roll gap of the replaced working roll is determined based on the actual contact force and the preset zero roll gap contact force, and the rolling process of the four-roll mill is controlled.

Description

Technical Field

[0001] The present application relates to the field of metallurgical production technology, and in particular to a method for identifying abnormal working roll diameter data and related equipment. Background Art

[0002] In the metallurgical production process, after a period of production, the working rolls of the hot-rolled strip production line will experience wear and peeling due to the rolling pressure and friction, which will cause the diameter of the working rolls to change, directly affecting the adjustment of the roll gap and the quality of the plate during the rolling process. Therefore, when replacing the working rolls, the diameter of the new rolls must be accurately measured and input into the control system so that the control system can adjust the rolling pressure and speed accordingly. However, in the actual production process, there is a risk of inputting incorrect working roll diameter data, resulting in deviations in the speed and load calculation of the rolling mill, which ultimately affects product quality and causes problems such as uneven thickness and plate shape deformation.

[0003] Traditional work roll diameter data recognition methods mostly rely on manual inspection and adjustment, which is inefficient and prone to human errors. Therefore, there is an urgent need for a method that can automatically and quickly identify abnormal work roll diameter data to improve production efficiency and product quality. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, the present application provides a method for identifying abnormal working roll diameter data, comprising:

[0006] Calculating a roll diameter deviation value based on working roll diameter data before and after the replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data;

[0007] Based on the preset stroke value and the above roller diameter deviation value, a zero roller gap stroke value is calculated;

[0008] Based on the above zero roll gap stroke value and the roll gap offset value, the roll gap stroke value is calculated;

[0009] Determine a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time;

[0010] When the above judgment result is normal, the roll gap of the replaced working roll is determined based on the above actual contact force and the preset zero roll gap contact force, and the rolling process of the four-high rolling mill is controlled.

[0011] In a feasible implementation manner, the roll gap offset value includes a first roll gap offset value, the roll gap stroke value includes a first roll gap stroke value, the preset contact force includes a first preset contact force, the preset time includes a first preset time, and the judgment result includes a first judgment result;

[0012] The specific steps of determining the first judgment result include:

[0013] Calculating the first roll gap stroke value based on the zero roll gap stroke value and the first roll gap offset value;

[0014] The first judgment result is determined based on the actual stroke value, the first roller gap stroke value, the actual contact force, the first preset contact force and the first preset time.

[0015] In a feasible implementation manner, the roll gap offset value includes a second roll gap offset value, the roll gap stroke value includes a second roll gap stroke value, the preset contact force includes a second preset contact force, the preset time includes a second preset time, and the judgment result includes a second judgment result;

[0016] When the first judgment result is normal, the second judgment result is judged, and the specific steps of determining the second judgment result include:

[0017] Calculating the second roll gap stroke value based on the zero roll gap stroke value and the second roll gap offset value;

[0018] The second judgment result is determined based on the actual stroke value, the second roller gap stroke value, the actual contact force, the second preset contact force and the second preset time.

[0019] In one possible implementation,

[0020] The above-mentioned preset stroke value is the stroke value when the zero roll gap is calibrated after the working roll is replaced last time.

[0021] In one possible implementation,

[0022] The above-mentioned four-roller rolling mill comprises an upper pad, a hydraulic cylinder, an upper support roll, an upper support roll bearing seat, an upper working roll, a lower working roll, a lower support roll, a lower support roll bearing seat and a lower pad;

[0023] The actual contact force is detected by a pressure head device installed on the lower pad;

[0024] The above-mentioned actual stroke value is measured by a magnetic ruler installed on the above-mentioned hydraulic cylinder.

[0025] In one possible implementation,

[0026] The first determination result is determined based on the actual stroke value, the first roller gap stroke value, the actual contact force, the first preset contact force and the first preset time, including:

[0027] When the actual stroke value is equal to the first roller gap stroke value and the duration of the first state is greater than or equal to the first preset time, the first judgment result is normal, wherein the duration of the first state is the duration of the state in which the actual contact force is less than the first preset contact force;

[0028] When at least one of the following conditions holds true: the actual stroke value is different from the first roller gap stroke value, the duration of the first state is less than the first preset time, and the actual contact force is greater than or equal to the first preset contact force, the first judgment result is abnormal.

[0029] In one possible implementation,

[0030] The second determination result is determined based on the actual stroke value, the second roller gap stroke value, the actual contact force, the second preset contact force and the second preset time, including:

[0031] When the actual stroke value is less than the second roller gap stroke value and the duration of the second state is greater than or equal to the second preset time, the second judgment result is normal, wherein the duration of the second state is the duration of the state in which the actual contact force is greater than or equal to the second preset contact force;

[0032] When the above-mentioned actual stroke value is equal to the above-mentioned second roller gap stroke value and the duration of the third state is greater than or equal to the second preset time, the above-mentioned second judgment result is abnormal, wherein the duration of the above-mentioned third state is the duration of the state in which the above-mentioned actual contact force is less than 20% of the above-mentioned second preset contact force.

[0033] In a second aspect, the present application proposes a device for identifying abnormal working roll diameter data, comprising:

[0034] A roll diameter deviation calculation unit, used to calculate a roll diameter deviation value based on working roll diameter data before replacement and working roll diameter data after replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data;

[0035] A zero roll gap value calculation unit, used for calculating a zero roll gap stroke value based on a preset stroke value and the above roll diameter deviation value;

[0036] A roll gap stroke calculation unit, used to calculate the roll gap stroke value based on the zero roll gap stroke value and the roll gap offset value;

[0037] A judgment result determination unit, used to determine a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time;

[0038] The roll gap determination unit is used to determine the roll gap of the replaced working roll based on the actual contact force and the preset zero roll gap contact force when the above judgment result is normal, and control the rolling process of the four-roll mill.

[0039] In a third aspect, an electronic device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for identifying abnormal working roll diameter data of any one of the first aspects when executing the computer program stored in the memory.

[0040] In a fourth aspect, the present application further proposes a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for identifying abnormal working roll diameter data of any one of the first aspects is implemented.

[0041] In summary, the embodiment of the present application greatly improves the accuracy of data judgment by introducing a series of real-time monitoring parameters such as the automatic calculation of the working roll diameter deviation value, hydraulic cylinder stroke, contact force, etc., and can immediately perform automatic data comparison and calculation after the working roll is replaced, without manual intervention, and quickly determine whether the newly input data matches the actual working roll diameter. Through precise calculation and automatic control, it avoids the errors that may occur in traditional manual data input, and fundamentally solves the system deviation problem caused by human error. Through automated means, it is possible to quickly determine whether the diameter data of the new roll is correct in the initial calibration stage after the roll is replaced, which greatly reduces the time of manual operation and improves the operating efficiency of the production line. When abnormal data is detected, an alarm signal can be immediately issued, so that the operator can quickly take corresponding treatment measures to reduce the interruption time of production. Through automated data recognition, the workload of the operator is reduced, and frequent manual measurement and calibration are no longer required, which greatly shortens the time required for roll replacement operations. Through real-time monitoring and data judgment, the diameter data after each work roll replacement is ensured to be accurate, thus ensuring the stability of product quality; the diameter data can be automatically checked before the rolling mill is started to prevent abnormal rolling pressure and product quality problems caused by data errors, and avoid the appearance of unqualified products; by ensuring the accuracy of the data, the scrap rate is reduced, the overall yield of the production line is improved, and the production efficiency and economic benefits of the enterprise are improved.

[0042] The method for identifying abnormal working roll diameter data proposed by the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A schematic flow chart of a method for identifying abnormal working roll diameter data provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the structure of a four-roll mill provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the structure of a device for identifying abnormal working roll diameter data provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the structure of an electronic device for identifying abnormal working roll diameter data provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0049] See also Figure 1 , which is a flow chart of a method for identifying abnormal working roll diameter data provided by an embodiment of the present application, which may specifically include:

[0050] S110, calculating a roll diameter deviation value based on working roll diameter data before replacement and working roll diameter data after replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data;

[0051] For example, when the working rolls are replaced, the diameters of the upper and lower working rolls usually change. By obtaining the working roll diameter data before and after the replacement, including the diameter data of the upper working roll and the lower working roll, the difference is calculated, and this difference is the roll diameter deviation value. The rolling mill controls the thickness of the compressed plate by adjusting the roll gap size during the rolling process. Therefore, accurate measurement of the roll diameter and deviation calculation are the guarantee of rolling quality. If the roll diameter has a large deviation, the roll gap will be too large or too small, thus affecting the rolling effect.

[0052] S120, calculating a zero roller gap stroke value based on a preset stroke value and the roller diameter deviation value;

[0053] Exemplarily, the preset stroke value is the stroke value of the rolling mill in the zero roll gap state calibrated after the last working roll replacement, which is usually obtained through automatic system calibration or manual calibration. It represents the roll gap stroke of the rolling mill when the working rolls are in contact and there is no compressed material under specific process conditions. After replacing the working rolls, the diameters of the upper and lower working rolls will be different, and the roll diameter deviation value reflects this change. The roll diameter deviation will affect the size of the roll gap, and then affect the contact force and stroke during the rolling process, so the stroke must be adjusted according to the change in roll diameter. The zero roll gap stroke value refers to the stroke state to which the rolling mill should be adjusted when no material passes after the diameter of the upper and lower working rolls changes. This stroke value is used to ensure the accuracy of the roll gap and avoid unnecessary losses or product quality problems due to stroke calculation errors during the rolling process.

[0054] S130, calculating the roll gap stroke value based on the zero roll gap stroke value and the roll gap offset value;

[0055] Exemplarily, based on the zero roll gap stroke value in the previous step, this represents the stroke of the hydraulic cylinder when the roll does not compress the material. This stroke is the reference stroke of the rolling mill under specific process conditions, usually obtained through previous calibration or calibration. The roll gap offset value specifically represents the adjustment range of the rolling mill in normal operation, which is usually a smaller amplitude range, corresponding to the expansion or contraction of the roll gap. These offset values ​​reflect the actual adjustment range between the working rolls to ensure that the roll gap can be flexibly changed under different material thicknesses and rolling requirements. The zero roll gap stroke value is added to the roll gap offset value to calculate the actual roll gap stroke value. This value is used to control the actual roll gap state of the rolling mill to ensure that the roll gap can be adjusted according to the preset offset value during the rolling process, thereby optimizing the material compression effect.

[0056] S140, determining a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time;

[0057] Exemplarily, according to the roll gap stroke value calculated in step S130, this value represents the target stroke value set by the current system, which is the working roll spacing of the rolling mill after adjustment. This value provides a benchmark for subsequent judgments. The current hydraulic cylinder extension stroke is monitored in real time by the sensor on the hydraulic cylinder to obtain the actual stroke value. This value is compared with the roll gap stroke value to detect whether it meets the set process requirements. The pressure head device detects the current contact pressure between the working rolls in real time through the sensor. The actual contact force reflects the force applied by the working rolls during the compression process, and is compared with the target preset contact force to evaluate whether the current process is normal. The preset contact force and preset time are target values ​​set in advance according to the process requirements. The preset contact force is usually the target compression pressure set by the system, which indicates the force that needs to be achieved during normal rolling. The preset time is a duration used to evaluate the stability of the system to ensure that the contact force can remain stable within the set time.

[0058] S150. When the above judgment result is normal, the roll gap of the replaced working roll is determined based on the above actual contact force and the preset zero roll gap contact force, and the rolling process of the four-high rolling mill is controlled.

[0059] Exemplarily, under the premise that the judgment result of the previous step S140 is normal, it means that the roll gap stroke, actual contact force and time conditions of the rolling mill all meet the preset requirements, and the system confirms that the replacement and adjustment of the working rolls in the current state are successful. The actual contact force is the pressure between the working rolls of the rolling mill in the current state, which has been detected and recorded in real time by the pressure head device sensor. After the system determines that the state is normal, this actual contact force will be used to determine the precise gap of the roll gap. The preset zero roll gap contact force is the pressure value that the working rolls of the rolling mill should reach in the zero roll gap state. This is a reference value that the system has set in the previous calibration process, which usually corresponds to the force when the working rolls are in full contact but do not compress any material. Based on the difference between the actual contact force and the preset zero roll gap contact force, the system calculates the roll gap gap of the working rolls. This calculation can reflect the actual distance when the working rolls interact with each other during the rolling process, ensuring that the thickness of the material can be accurately controlled under different contact forces. Based on the calculated roll gap gap, the system adjusts the hydraulic cylinder or other control device to ensure that the distance between the working rolls reaches the required roll gap. When the mill enters the normal rolling stage, the system monitors and maintains the roll gap between the working rolls in real time to ensure accurate control of material thickness during the rolling process. If the roll gap is too large or too small, the system will automatically adjust the stroke of the hydraulic cylinder to maintain a stable roll gap state and ensure that the working rolls will not generate excessive or insufficient pressure during the rolling process to avoid excessive or insufficient compression of the material.

[0060] In summary, the embodiments of the present application greatly improve the accuracy of data judgment by introducing a series of real-time monitoring parameters such as the automatic calculation of the working roll diameter deviation value, hydraulic cylinder stroke, contact force, etc., and can perform automatic data comparison and calculation immediately after the working roll is replaced, without manual intervention, and quickly determine whether the newly input data matches the actual working roll diameter. Through automated means, it is possible to quickly determine whether the diameter data of the new roll is correct during the initial calibration stage after the roll is replaced, which greatly reduces the time for manual operation and improves the operating efficiency of the production line. When abnormal data is detected, an alarm signal can be immediately issued, allowing the operator to quickly take corresponding treatment measures. Through real-time monitoring and data judgment, the diameter data after each replacement of the working roll is ensured to be accurate, thereby ensuring the stability of product quality and further improving the production efficiency and economic benefits of the enterprise.

[0061] In some examples,

[0062] The above-mentioned four-roller rolling mill comprises an upper pad, a hydraulic cylinder, an upper support roll, an upper support roll bearing seat, an upper working roll, a lower working roll, a lower support roll, a lower support roll bearing seat and a lower pad;

[0063] The actual contact force is detected by a pressure head device installed on the lower pad;

[0064] The above-mentioned actual stroke value is measured by a magnetic ruler installed on the above-mentioned hydraulic cylinder.

[0065] Exemplarily, the structural diagram of the four-roll mill is as follows Figure 2 As shown, A is the height of the upper pad, B is the stroke of the hydraulic cylinder rod, C is the height of the hydraulic cylinder body, D is 1 / 2 the height of the upper support roller bearing seat, E is the radius of the upper support roller, F is the diameter of the upper working roll, G is the roll gap between the upper and lower working rolls, H is the diameter of the lower working roll, I is the radius of the lower support roller, J is 1 / 2 the height of the lower support roller bearing seat, K is the height of the lower pad, L is the overall height of the rolling mill, α is the offset of the upper support roller, and β is the offset of the lower support roller.

[0066] The upper pad 1 is located at the top of the rolling mill, used to support the upper working rolls and related components, and maintain the stability of the entire rolling mill; the hydraulic cylinder 2 is installed in the four-roll mill, used to drive the upper support roll and the upper working roll to move up and down, and the telescopic action of the hydraulic cylinder directly affects the gap adjustment between the working rolls, thereby controlling the thickness of the plate; the upper support roll 4 bears the weight of the upper working roll 5, and is fixed to the rolling mill through the upper support roll bearing seat 3, and its function is to support and stabilize the rotation of the upper working roll 5; the upper working roll 5 directly contacts the plate and performs rolling operations, and is one of the core components of the four-roll mill. Its diameter size and adjustment state have a direct impact on the final thickness of the rolled material; the lower working roll 6 is opposite to the upper working roll 5, clamping the material for compression rolling. The lower support roll 7 is similar to the upper support roll 4, and plays the role of supporting and stabilizing the lower working roll; the lower pad 9 is located at the bottom of the rolling mill, and plays the role of supporting the entire lower assembly, ensuring the stability of the lower working roll 6 and the lower support roll 7. The lower support roll bearing seat 9 is used to fix the lower support roll to ensure the smooth operation of the lower support roll.

[0067] The pressure head device is installed on the lower pad to detect the actual contact force between the working rolls. During the rolling process, when the upper and lower working rolls press the material, the contact force generated will be transmitted to the pressure head device through the lower pad. The pressure head device monitors this force in real time through sensors and transmits data to the control system to ensure that the pressure between the working rolls is within the preset range.

[0068] The magnetic ruler is installed on the hydraulic cylinder to measure the extension and retraction stroke of the hydraulic cylinder. The stroke of the hydraulic cylinder directly reflects the actual gap change between the working rolls. Each extension and retraction of the hydraulic cylinder will change the distance between the working rolls. The magnetic ruler measures the extension length of the hydraulic cylinder in real time to determine the actual gap between the working rolls.

[0069] In some examples, the roller gap offset value includes a first roller gap offset value, the roller gap stroke value includes a first roller gap stroke value, the preset contact force includes a first preset contact force, the preset time includes a first preset time, and the judgment result includes a first judgment result;

[0070] The specific steps of determining the first judgment result include:

[0071] Calculating the first roll gap stroke value based on the zero roll gap stroke value and the first roll gap offset value;

[0072] Determining the first judgment result based on the actual stroke value, the first roller gap stroke value, the actual contact force, the first preset contact force and the first preset time includes:

[0073] When the actual stroke value is equal to the first roller gap stroke value and the duration of the first state is greater than or equal to the first preset time, the first judgment result is normal, wherein the duration of the first state is the duration of the state in which the actual contact force is less than the first preset contact force;

[0074] When at least one of the following conditions holds true: the actual stroke value is different from the first roller gap stroke value, the duration of the first state is less than the first preset time, and the actual contact force is greater than or equal to the first preset contact force, the first judgment result is abnormal.

[0075] In some examples, the roller gap offset value includes a second roller gap offset value, the roller gap stroke value includes a second roller gap stroke value, the preset contact force includes a second preset contact force, the preset time includes a second preset time, and the judgment result includes a second judgment result;

[0076] When the first judgment result is normal, the second judgment result is judged, and the specific steps of determining the second judgment result include:

[0077] Calculating the second roll gap stroke value based on the zero roll gap stroke value and the second roll gap offset value;

[0078] Determining the second judgment result based on the actual stroke value, the second roller gap stroke value, the actual contact force, the second preset contact force and the second preset time includes:

[0079] When the actual stroke value is less than the second roller gap stroke value and the duration of the second state is greater than or equal to the second preset time, the second judgment result is normal, wherein the duration of the second state is the duration of the state in which the actual contact force is greater than or equal to the second preset contact force;

[0080] When the above-mentioned actual stroke value is equal to the above-mentioned second roller gap stroke value and the duration of the third state is greater than or equal to the second preset time, the above-mentioned second judgment result is abnormal, wherein the duration of the above-mentioned third state is the duration of the state in which the above-mentioned actual contact force is less than 20% of the above-mentioned second preset contact force.

[0081] In view of the above content, detailed explanation is given based on actual working roll replacement data:

[0082] Embodiment 1, after the working rolls are replaced and the upper and lower working rolls are loaded into the rolling mill, the control unit issues a rolling mill rotation instruction, the transmission device drives the upper and lower working rolls to rotate, and the upper and lower support rolls rotate with the working rolls;

[0083] The control unit memorizes the stroke value B of the hydraulic cylinder when the roll gap was calibrated to zero (0mm) after the last work roll replacement.old0 is 145mm; the stroke value when zero roll gap is calibrated after the last work roll replacement is the preset stroke value, i.e. B old0 The value of .

[0084] Diameter data of upper working roll before replacement F old 600mm, lower working roll data H old Input 600mm into the control unit; replace the new upper working roll diameter data F new The diameter of the lower working roll is 610 mm. new The control unit inputs the new upper working roll diameter data F new , lower working roll diameter data H new Diameter data of upper working roll before replacement F old , lower working roll diameter data H old By comparison, the roller diameter deviation value FH is obtained dev =(F new +H new )-(F old +H old )=(610mm+610mm)-(600mm+600mm)=20mm; the control unit calculates the stroke value B of the zero roll gap hydraulic cylinder after the working roll is replaced new0 =B old0 -FH dev =145mm-20mm=125mm, where B new0 The control unit calculates the stroke value B of the 5mm roll gap hydraulic cylinder after the working roll is replaced. new5 =B new0 -5 = 125mm -5mm = 120mm; the control unit calculates the -5mm roll gap hydraulic cylinder extension stroke value B after the working roll is replaced new-5 =B new0 -(-5mm)=125mm-(-5mm)=130mm, where 5mm roll gap is the first roll gap offset value, -5mm roll gap is the second roll gap offset value, B new5 is the first roller gap stroke value, B new-5 is the second roller gap stroke value, and the first roller gap offset value and the second roller gap offset value can be set according to actual conditions.

[0085] The control unit sets a first preset contact force F touch01 is 500kN; set the second preset contact force F touch02 2000kN; set the preset zero roll gap contact force F 0mm is 15000kN; the first preset time T1 is set to 5 seconds; the second preset time T2 is set to 5 seconds; the third preset time T3 is set to 10 seconds;

[0086] The control unit sends the stroke value B of the hydraulic cylinder rod extending to the calculated 5mm roll gap hydraulic cylinder extension after the working roll is replaced. new5 That is, a position instruction of 120mm, that is, an instruction for the first roll gap stroke value is issued, and the hydraulic cylinder rod drives the upper support roller and the upper working roller to approach the lower working roller. When the actual stroke of the hydraulic cylinder rod detected by the magnetic scale is equal to the 120mm position, the control unit stops the hydraulic cylinder extension instruction, and the hydraulic cylinder rod remains at the current 120mm position. At this time, the contact force detected by the pressure head device is 20kN (actual contact force), which is less than the first preset contact force of 500kN. When the control unit calculates that the state time reaches 5 seconds of the first preset time T1, that is, the above-mentioned actual stroke value is equal to the above-mentioned first roll gap stroke value and the first state duration is greater than or equal to the first preset time, the above-mentioned first judgment result is normal, wherein the above-mentioned first state duration is the state duration when the above-mentioned actual contact force is less than the above-mentioned first preset contact force, and it is judged that the diameter of the actual working roller is normal with the data set by the system, and the next step is executed.

[0087] If the actual working roll diameter detected in the previous process is normal with the system set data, the control unit issues a hydraulic cylinder rod extension command, and the hydraulic cylinder rod drives the upper support roll and the upper working roll to approach the lower working roll and cause the pressure head detection device to generate contact force. When the actual stroke of the hydraulic cylinder rod detected by the magnetic ruler is equal to the calculated B new-5 That is, when it is 130mm, the second roll gap stroke value instruction is issued, the control unit stops the hydraulic cylinder extension instruction, and the hydraulic cylinder rod remains in the current position. At this time, the contact force detected by the pressure head device is 240kN, which is less than 400kN, which is 20% of the second preset contact force. When the control unit calculates that the state time reaches 5 seconds of the second preset time T2, it judges that the diameter of the actual working roll is less than the data set by the system, and outputs an alarm, that is, when the above-mentioned actual stroke value is equal to the above-mentioned second roll gap stroke value and the duration of the third state is greater than or equal to the second preset time, the above-mentioned second judgment result is abnormal, wherein the duration of the above-mentioned third state is the duration of the state in which the above-mentioned actual contact force is less than 20% of the above-mentioned second preset contact force; the control unit issues an instruction for the hydraulic cylinder rod to retract to the original position, and the control unit issues an instruction for the rolling mill to stop rotating, wherein the original position refers to the initial position when the hydraulic cylinder is actuated this time, generally refers to the position where the roll gap is opened, that is, the hydraulic cylinder is retracted.

[0088] Embodiment 2, after the working rolls are replaced and the upper and lower working rolls are loaded into the rolling mill, the control unit issues a rolling mill rotation instruction, the transmission device drives the upper and lower working rolls to rotate, and the upper and lower support rolls rotate with the working rolls;

[0089] The control unit memorizes the stroke value B of the hydraulic cylinder when the roll gap was calibrated to zero (0mm) after the last work roll replacement. old0is 138mm; the stroke value when calibrating the zero roll gap after the last work roll replacement is the preset stroke value, that is, B old0 The value of .

[0090] Diameter data of upper working roll before replacement F old 620mm, lower working roll data H old Input 620mm into the control unit; replace the new upper working roll diameter data F new The diameter of the lower working roll is 630 mm. new The control unit inputs the new upper working roll diameter data F new , lower working roll diameter data H new Diameter data of upper working roll before replacement F old , lower working roll diameter data H old By comparison, the roller diameter deviation value FH is obtained dev =(F new +H new )-(F old +H old )=(630mm+630mm)-(620mm+620mm)=20mm; the control unit calculates the stroke value B of the zero roll gap hydraulic cylinder after the working roll is replaced new0 =B old0 -FH dev =138mm-20mm=118mm, where B new0 The control unit calculates the stroke value B of the 5mm roll gap hydraulic cylinder after the working roll is replaced. new5 =B new0 -5 = 118 mm - 5 mm = 113 mm; the control unit calculates the -5 mm roll gap hydraulic cylinder extension stroke value B after the working roll is replaced new-5 =B new0 -(-5mm)=118mm-(-5mm)=123mm, where 5mm roll gap is the first roll gap offset value, -5mm roll gap is the second roll gap offset value, B new5 is the first roller gap stroke value, B new-5 is the second roller gap stroke value.

[0091] The control unit sets a first preset contact force F touch01 is 500kN; set the second preset contact force F touch02 2000kN; set the preset zero roll gap contact force F 0mm is 15000kN; the first preset time T1 is set to 5 seconds; the second preset time T2 is set to 5 seconds; the third preset time T3 is set to 10 seconds;

[0092] The control unit sends the stroke value B of the hydraulic cylinder rod extending to the calculated 5mm roll gap hydraulic cylinder extension after the working roll is replaced. new5 That is, the position instruction of 113mm, that is, the first roll gap stroke value instruction is issued, the hydraulic cylinder rod drives the upper support roller and the upper working roller to approach the lower working roller, and when the actual stroke of the hydraulic cylinder rod detected by the magnetic scale is equal to the 113mm position, the control unit stops the hydraulic cylinder extension instruction, and the hydraulic cylinder rod remains at the current 113mm position. At this time, the contact force detected by the pressure head device is 20kN (actual contact force), which is less than the first preset contact force of 500kN. When the control unit calculates that the state time reaches 5 seconds of the first preset time T1, that is, the above-mentioned actual stroke value is equal to the above-mentioned first roll gap stroke value and the first state duration is greater than or equal to the first preset time, the above-mentioned first judgment result is normal, wherein the above-mentioned first state duration is the state duration when the above-mentioned actual contact force is less than the above-mentioned first preset contact force, and it is judged that the diameter of the actual working roller is normal with the data set by the system, and the next step is executed.

[0093] If the actual working roll diameter detected in the previous process is normal with the system set data, the control unit issues a hydraulic cylinder rod extension command, and the hydraulic cylinder rod drives the upper support roll and the upper working roll to approach the lower working roll and cause the pressure head detection device to generate contact force. When the actual stroke of the hydraulic cylinder rod detected by the magnetic ruler is 119mm, which is less than the calculated B new-5 That is, when it is 123mm, the second roll gap stroke value instruction is issued, the control unit stops the hydraulic cylinder extension instruction, the hydraulic cylinder rod remains in the current position, the contact force detected by the pressure head device is 2140kN, which is greater than the second preset contact force of 2000kN. When the control unit calculates that the state time reaches 5 seconds of the second preset time T2, it is judged that the diameter of the actual working roll is normal with the data set by the system, that is, when the above-mentioned actual stroke value is less than the above-mentioned second roll gap stroke value and the second state duration is greater than or equal to the second preset time, the above-mentioned second judgment result is normal, wherein the above-mentioned second state duration is the state duration when the above-mentioned actual contact force is greater than or equal to the above-mentioned second preset contact force, and the next step is executed.

[0094] If the actual working roll diameter detected in the previous process is normal with the data set by the system, the control unit issues a command for the hydraulic cylinder rod to extend until the contact force reaches the preset zero roll gap contact force of 15000kN, and the hydraulic cylinder rod drives the upper support roll and the upper working roll to approach the lower working roll. When the contact force detected by the pressure head device is equal to 15000kN, the control unit stops the hydraulic cylinder rod extension command and maintains the current position. When the contact force detected by the pressure head device is equal to 15000kN and reaches 10 seconds of the third preset time T3, the control unit memorizes the stroke of the hydraulic cylinder rod when the current hydraulic cylinder rod extension stroke is 0mm roll gap, the mill work roll gap calibration is completed, and the control unit issues a mill stop rotation command. The roll gap gap between the upper working roll and the lower working roll required for rolling the steel plate is calculated based on the 0mm roll gap hydraulic cylinder rod stroke memorized by the control unit.

[0095] See also Figure 3 , which is a schematic diagram of the structure of a device for identifying abnormal working roll diameter data provided by an embodiment of the present application, comprising:

[0096] A roll diameter deviation calculation unit 21, used to calculate a roll diameter deviation value based on working roll diameter data before replacement and working roll diameter data after replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data;

[0097] A zero roll gap value calculation unit 22, used to calculate a zero roll gap stroke value based on a preset stroke value and the above roll diameter deviation value;

[0098] A roll gap stroke calculation unit 23, used to calculate a roll gap stroke value based on the zero roll gap stroke value and the roll gap offset value;

[0099] A judgment result determination unit 24, used to determine a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time;

[0100] The roll gap determination unit 25 is used to determine the roll gap of the replaced working roll based on the actual contact force and the preset zero roll gap contact force when the above judgment result is normal, and control the rolling process of the four-high rolling mill.

[0101] See also Figure 4 The embodiment of the present application further provides an electronic device 300, comprising a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any of the above-mentioned methods for identifying abnormal working roll diameter data are implemented.

[0102] Since the electronic device introduced in this embodiment is a device used to implement a device for identifying abnormal working roll diameter data in the embodiment of the present application, based on the method introduced in the embodiment of the present application, technical personnel in this field can understand the specific implementation mode of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of the present application is not introduced in detail here. As long as the equipment used by technical personnel in this field to implement the method in the embodiment of the present application is within the scope of protection of this application.

[0103] During the specific implementation process, when the computer program 311 is executed by a processor, any implementation method in the embodiments corresponding to the first aspect can be implemented.

[0104] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0106] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, 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 computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0109] The present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes Figure 1 A process of a method for identifying abnormal working roll diameter data in a corresponding embodiment.

[0110] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0111] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0112] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0113] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0114] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0115] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0116] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0117] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0118] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for identifying abnormal working roll diameter data, characterized in that: The method comprises: Calculating a roll diameter deviation value based on working roll diameter data before and after the replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data; Calculating a zero roll gap stroke value based on a preset stroke value and the roll diameter deviation value; Calculating a roll gap stroke value based on the zero roll gap stroke value and the roll gap offset value; Determining a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time; When the judgment result is normal, the roll gap of the replaced working roll is determined based on the actual contact force and the preset zero roll gap contact force, and the rolling process of the four-high rolling mill is controlled.

2. The method for identifying abnormal working roll diameter data according to claim 1, characterized in that: The roll gap offset value includes a first roll gap offset value, the roll gap stroke value includes a first roll gap stroke value, the preset contact force includes a first preset contact force, the preset time includes a first preset time, and the judgment result includes a first judgment result; The specific steps of determining the first judgment result include: Calculating the first roll gap stroke value based on the zero roll gap stroke value and the first roll gap offset value; The first judgment result is determined based on the actual stroke value, the first roller gap stroke value, the actual contact force, the first preset contact force and the first preset time.

3. The method for identifying abnormal working roll diameter data according to claim 2, characterized in that: The roll gap offset value includes a second roll gap offset value, the roll gap stroke value includes a second roll gap stroke value, the preset contact force includes a second preset contact force, the preset time includes a second preset time, and the judgment result includes a second judgment result; When the first judgment result is normal, the second judgment result is judged, and the specific steps of determining the second judgment result include: Calculating the second roll gap stroke value based on the zero roll gap stroke value and the second roll gap offset value; The second judgment result is determined based on the actual stroke value, the second roller gap stroke value, the actual contact force, the second preset contact force and the second preset time.

4. The method for identifying abnormal working roll diameter data according to claim 1, characterized in that: The preset stroke value is the stroke value when the zero roll gap is calibrated after the working roll is replaced last time.

5. The method for identifying abnormal working roll diameter data according to claim 1, characterized in that: The four-roll mill comprises an upper pad, a hydraulic cylinder, an upper support roll, an upper support roll bearing seat, an upper working roll, a lower working roll, a lower support roll, a lower support roll bearing seat and a lower pad; The actual contact force is detected by a pressure head device installed on the lower pad; The actual stroke value is measured by a magnetic scale installed on the hydraulic cylinder.

6. The method for identifying abnormal working roll diameter data according to claim 2, characterized in that: The determining the first judgment result based on the actual stroke value, the first roller gap stroke value, the actual contact force, the first preset contact force and the first preset time includes: When the actual stroke value is equal to the first roller gap stroke value and the duration of the first state is greater than or equal to the first preset time, the first judgment result is normal, wherein the duration of the first state is the duration of the state in which the actual contact force is less than the first preset contact force; When at least one of the following conditions holds true: the actual stroke value is different from the first roller gap stroke value, the duration of the first state is less than the first preset time, and the actual contact force is greater than or equal to the first preset contact force, the first judgment result is abnormal.

7. The method for identifying abnormal working roll diameter data according to claim 3, characterized in that: The determining the second judgment result based on the actual stroke value, the second roller gap stroke value, the actual contact force, the second preset contact force and the second preset time includes: In the case where the actual stroke value is less than the second roller gap stroke value and the duration of the second state is greater than or equal to the second preset time, the second judgment result is normal, wherein the duration of the second state is the duration of the state in which the actual contact force is greater than or equal to the second preset contact force; When the actual stroke value is equal to the second roller gap stroke value and the duration of the third state is greater than or equal to the second preset time, the second judgment result is abnormal, wherein the duration of the third state is the duration of the state in which the actual contact force is less than 20% of the second preset contact force.

8. A device for identifying abnormal working roll diameter data, characterized in that: include: A roll diameter deviation calculation unit, used to calculate a roll diameter deviation value based on working roll diameter data before replacement and working roll diameter data after replacement, wherein the working roll diameter data includes upper working roll diameter data and lower working roll diameter data; A zero roll gap value calculation unit, used for calculating a zero roll gap stroke value based on a preset stroke value and the roll diameter deviation value; A roll gap stroke calculation unit, used for calculating a roll gap stroke value based on the zero roll gap stroke value and the roll gap offset value; A judgment result determination unit, used to determine a judgment result based on the roller gap stroke value, the actual stroke value, the actual contact force, the preset contact force and the preset time; The roll gap determination unit is used to determine the roll gap of the replaced working roll based on the actual contact force and the preset zero roll gap contact force when the judgment result is normal, and control the rolling process of the four-roll mill.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is used to implement the steps of the method for identifying abnormal working roll diameter data as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for identifying abnormal working roll diameter data according to any one of claims 1 to 7 is implemented.

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