A method and device for automatically updating slab size data

Abstract

The present invention relates to a method and device for automatically updating slab dimension data, belonging to the technical field of rolling methods and devices in the metallurgical industry. The technical solution of the present invention is as follows: when a slab is removed on the rolling line, by judging whether the slab has passed through the width reducing mill reduction and rough rolling conditions, the current length, width and thickness values of the slab are automatically calculated, and the process control computer sends them to the production manufacturing system through message information, so as to realize the automatic update of the length, width and thickness dimension information of the slab when the removed slab is produced again. The beneficial effects of the present invention are as follows: it reduces the manual measurement error and labor intensity, and also avoids the safety risks of the staff when operating in the slab yard.

Description

Technical Field

[0001] The present invention relates to a method and device for automatically updating slab dimension data, belonging to the technical field of steel rolling methods and devices in the metallurgical industry. Background Art

[0002] In the hot rolling technical field, continuous casting slabs are reheated in a reheating furnace, descaled under high pressure, width-set, rough rolled, finish rolled, and laminar cooled, and finally enter an underground coiler to be coiled into coils. When there is a steel pile-up in the rolling mill or other equipment is not in production condition, it is often necessary to remove the slabs that have left the furnace from the rolling line, and there is a possibility of rescheduling the removed slabs. For slabs before or after one pass of rough rolling, in order to reduce production waste and minimize slab inventory, when the length, width, and thickness of the slab do not exceed the steel charging limit of the reheating furnace, the slabs removed from the rolling line need to be recharged into the furnace for rolling.

[0003] If the slabs removed from the hot rolling production line have been subjected to large reduction rolling by a width setter or rough rolling, the slab dimensions, i.e., length, width, and thickness, will surely have changed greatly. When recharged into the furnace for production, accurate dimension information such as the length, width, and thickness of the slab must be input from the production and sales system. Generally, the dimension information of the deformed slabs is obtained by on-site measurement using measuring tools such as a tape measure by the staff and then manually input into the production and sales system.

[0004] The applicant has found that the currently adopted method not only has a large measurement error, but also the harsh working environment in the slab yard is very unfavorable to the physical health and safety of the staff. Summary of the Invention

[0005] The object of the present invention is to provide a method and device for automatically updating slab dimension data. When removing slabs from the rolling line, by judging whether the slab has been subjected to width setter reduction and rough rolling, the current length, width, and thickness values of the slab are automatically calculated, and the process control computer sends them to the production and manufacturing system through message information, so as to automatically update the dimension information such as the length, width, and thickness of the slab when the removed slab is produced again, reducing the manual measurement error and labor intensity, and also avoiding the safety risks of the staff when operating in the slab yard, effectively solving the above problems existing in the background art.

[0006] The technical solution of the present invention is: a method for automatically updating slab dimension data, comprising the following steps:

[0007] (1) When the slab has been produced on the hot strip mill production line but the hot strip mill production line is not in production condition due to steel pile-up, equipment failure, etc., the slab is removed from the hot strip mill production line and returned to the slab yard. After the operator performs the slab removal operation from the man-machine interface, the current rolling data of the slab is collected;

[0008] (2) Call the original thickness, original width, and original length of the slab;

[0009] Call the steel biting time, steel discharging time, slab thickness, width, length, and temperature at the exit of the width sizing machine of the slab;

[0010] Call the current rolling pass of the slab, as well as the thickness, width, length, and temperature of the slab at the exit of the current grade. The current rolling pass is the number of rough rolling passes that the slab has passed through;

[0011] (3) Based on the original thickness, original width, and original length information of the slab, update the current thickness, current width, and current length of the slab;

[0012] (4) Based on the steel biting time and steel discharging time of the width sizing machine of the slab, determine whether the steel discharging time of the width sizing machine of the slab is greater than the steel biting time. If so, it is determined that the slab has passed through the width sizing machine rolling, and the width sizing machine flag bit of the slab is true; otherwise, it is determined that the slab has passed through the width sizing machine rolling, and the width sizing machine flag bit of the slab is false;

[0013] (5) Based on the width sizing machine flag bit of the slab, update the current thickness, current width, and current length of the slab. If the width sizing machine flag bit of the slab is true, calculate the thermal expansion coefficient according to the exit temperature of the width sizing machine, convert the width sizing machine exit thickness, width sizing machine exit width, and width sizing machine exit length of the slab to cold state values, and update them to the current thickness, current width, and current length of the slab;

[0014] (6) Determine whether the current rolling pass of the slab is greater than zero. If so, it means that the slab has passed through rough rolling. Then, calculate the thermal expansion coefficient based on the exit temperature of the current rolling pass, convert the exit thickness, width, and length corresponding to the current rolling pass of the slab to cold state values, and update them to the current thickness, current width, and current length of the slab;

[0015] (7) Use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

[0016] The thermal expansion coefficient mentioned above is a function related to the slab temperature. The thermal expansion coefficient is denoted as α, and the slab temperature is denoted as T. Then, the calculation formula for the thermal expansion coefficient α is:

[0017] .

[0018] The width sizing machine exit thickness, width sizing machine exit width, width sizing machine exit length, and the exit thickness, width, and length corresponding to the rough rolling pass mentioned above are hot state values, that is, the values under the temperature conditions at the corresponding positions of the slab; the cold state value is obtained by dividing the hot state value of the slab by the thermal expansion coefficient, representing the value of the slab under room temperature conditions.

[0019] The current thickness, current width, and current length of the slab are hot state values, while the original thickness, original width, and original length of the slab are cold state values.

[0020] A device for automatically updating slab size data includes a data acquisition module, a first call module, a second call module, a third call module, a first acquisition module, a second acquisition module, a third acquisition module, and a control module. The data acquisition module is used to collect the current rolling data of the slab when the slab has been produced on the hot strip rolling line but needs to be removed from the hot strip rolling line and returned to the slab storage due to steel piling up, equipment failures, etc. on the hot strip rolling line, and after the operator performs the slab removal operation from the man-machine interface.

[0021] The first call module is used to call the original thickness, width, and length information of the slab.

[0022] The second call module is used to call the biting time, throwing time, slab thickness, width, length, and temperature at the outlet of the width setter of the slab.

[0023] The third call module is used to call the current rolling pass of the slab, as well as the thickness, width, length, and temperature at the outlet of the current pass. The current rolling pass is the number of rough rolling times that the slab has passed through.

[0024] The first acquisition module is used to obtain the current thickness, current width, and current length of the slab based on the original thickness, width, and length information of the slab.

[0025] The second acquisition module is used to judge whether the throwing time of the width setter of the slab is greater than the biting time of the width setter based on the biting time and throwing time of the width setter of the slab. If so, it is judged that the slab has passed through the width setter rolling, and the width setter flag bit of the slab is true; otherwise, it is judged that the slab has passed through the width setter rolling, and the width setter flag bit of the slab is false. Based on the width setter flag bit of the slab, update the current thickness, current width, and current length of the slab. If the width setter flag bit of the slab is true, calculate the thermal expansion coefficient according to the outlet temperature of the width setter, convert the outlet thickness, outlet width, and outlet length of the width setter of the slab into cold state values, and update them into the current thickness, current width, and current length of the slab.

[0026] The third acquisition module is used to judge whether the current rolling pass is greater than zero. If so, it means that the slab has passed through rough rolling, then calculate the thermal expansion coefficient based on the outlet temperature of the current rolling pass, convert the outlet thickness, width, and length corresponding to the current rolling pass of the slab into cold state values, and update the current thickness, current width, and current length of the slab.

[0027] The control module is used to use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

[0028] The coefficient of thermal expansion is a function related to the temperature of the slab. The coefficient of thermal expansion is denoted as α, and the temperature of the slab is denoted as T. Then the calculation formula for the coefficient of thermal expansion α is:

[0029] 。

[0030] The thickness, width, and length at the exit of the width setter and the thickness, width, and length corresponding to the exit of the rough rolling passes are hot state values, that is, the values under the temperature conditions at the corresponding positions of the slab.

[0031] The cold state value is obtained by dividing the hot state value of the slab by the coefficient of thermal expansion, representing the value of the slab under room temperature conditions.

[0032] The current thickness, current width, and current length of the slab are hot state values, and the original thickness, original width, and original length of the slab are cold state values.

[0033] The beneficial effects of the present invention are as follows: When a slab is rejected on the rolling line, by judging whether the slab has passed through the width setter reduction and rough rolling conditions, the current length, width, and thickness values of the slab are automatically calculated, and the process control computer sends them to the production manufacturing system through message information. When the rejected slab is produced again, the size information such as the length, width, and thickness of the slab is automatically updated, reducing the manual measurement error and labor intensity, and also avoiding the safety risks of the staff during the operation in the slab yard. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the working flow chart of the present invention;

[0035] Figure 2 is the structural block diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0036] In order to make the objectives, technical solutions, and advantages of the embodiments of the invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are a small part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0037] A method for automatically updating slab size data includes the following steps:

[0038] (1)When the slab has been produced on the hot continuous rolling production line, but due to steel piling up, equipment failures, etc. on the hot continuous rolling production line, which make it unqualified for production, the slab is removed from the hot continuous rolling production line and returned to the slab storage. After the operator performs the slab removal operation from the man-machine interface, the current rolling data of the slab is collected;

[0039] (2)Call the original thickness, original width, and original length of the slab;

[0040] Call the biting time, throwing time, slab thickness, width, length, and temperature at the exit of the sizing press of the slab;

[0041] Call the current rolling pass of the slab, the thickness, width, length, and temperature of the slab at the exit of the current pass. The current rolling pass is the number of rough rolling passes that the slab has passed through;

[0042] (3)Based on the original thickness, original width, and original length information of the slab, update the current thickness, current width, and current length of the slab;

[0043] (4)Based on the biting time and throwing time of the sizing press of the slab, judge whether the throwing time of the sizing press of the slab is greater than the biting time of the sizing press. If so, it is judged that the slab has passed through the sizing press rolling, and the sizing press flag bit of the slab is true. Otherwise, it is judged that the slab has passed through the sizing press rolling, and the sizing press flag bit of the slab is false;

[0044] (5)Based on the sizing press flag bit of the slab, update the current thickness, current width, and current length of the slab. If the sizing press flag bit of the slab is true, calculate the thermal expansion coefficient according to the exit temperature of the sizing press, convert the exit thickness, exit width, and exit length of the sizing press of the slab into cold state values, and update them into the current thickness, current width, and current length of the slab;

[0045] (6)Judge whether the current rolling pass of the slab is greater than zero. If so, it means that the slab has passed through rough rolling. Then calculate the thermal expansion coefficient based on the exit temperature of the current rolling pass, convert the corresponding exit thickness, width, and length of the current rolling pass of the slab into cold state values, and update them into the current thickness, current width, and current length of the slab;

[0046] (7)Use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

[0047] The thermal expansion coefficient mentioned above is a function related to the slab temperature. Denote the thermal expansion coefficient as α and the slab temperature as T. Then the calculation formula for the thermal expansion coefficient α is:

[0048] 。

[0049] The outlet thickness, outlet width, outlet length of the width setter, and the corresponding outlet thickness, width, and length of the rough rolling passes are hot state values, that is, the values under the temperature conditions at the corresponding positions of the slab; the cold state values are obtained by dividing the hot state values of the slab by the coefficient of thermal expansion, representing the values of the slab at room temperature.

[0050] The current thickness, current width, and current length of the slab are hot state values, and the original thickness, original width, and original length of the slab are cold state values.

[0051] A device for automatically updating slab size data includes a data acquisition module, a first call module, a second call module, a third call module, a first acquisition module, a second acquisition module, a third acquisition module, and a control module. The data acquisition module is used to collect the current rolling data of the slab when the slab has been produced on the hot strip mill production line but needs to be removed from the hot strip mill production line and returned to the slab storage due to steel piling up, equipment failures, etc. on the hot strip mill production line. After the operator performs the slab removal operation from the man-machine interface, the data acquisition module collects the current rolling data of the slab.

[0052] The first call module is used to call the original thickness, width, and length information of the slab.

[0053] The second call module is used to call the width setter biting time, throwing time, outlet slab thickness, width, length, and temperature of the slab.

[0054] The third call module is used to call the current rolling pass of the slab, as well as the outlet thickness, width, length, and temperature of the current pass. The current rolling pass is the number of rough rolling times that the slab has passed through.

[0055] The first acquisition module is used to obtain the current thickness, current width, and current length of the slab based on the original thickness, width, and length information of the slab.

[0056] The second acquisition module is used to determine whether the width setter throwing time of the slab is greater than the width setter biting time based on the width setter biting time and throwing time of the slab. If so, it is determined that the slab has passed through the width setter rolling, and the width setter flag bit of the slab is true; otherwise, it is determined that the slab has passed through the width setter rolling, and the width setter flag bit of the slab is false. Based on the width setter flag bit of the slab, the current thickness, current width, and current length of the slab are updated. If the width setter flag bit of the slab is true, the coefficient of thermal expansion is calculated according to the outlet temperature of the width setter, and the outlet thickness, outlet width, and outlet length of the width setter of the slab are converted into cold state values and updated into the current thickness, current width, and current length of the slab.

[0057] A third acquisition module, configured to determine whether the current rolling pass is greater than zero. If so, it indicates that the slab has undergone rough rolling. Then, calculate the thermal expansion coefficient based on the outlet temperature of the current rolling pass, convert the outlet thickness, width, and length of the slab corresponding to the current rolling pass into cold state values, and update the current thickness, current width, and current length of the slab.

[0058] A control module, configured to use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

[0059] The thermal expansion coefficient is a function related to the slab temperature. Denote the thermal expansion coefficient as α and the slab temperature as T. Then, the calculation formula for the thermal expansion coefficient α is:

[0060] 。

[0061] The thickness, width, and length at the outlet of the width setter and the thickness, width, and length at the outlet corresponding to the rough rolling passes are hot state values, that is, the values under the temperature conditions at the corresponding positions of the slab.

[0062] The cold state value is obtained by dividing the hot state value of the slab by the thermal expansion coefficient, representing the value of the slab under room temperature conditions.

[0063] The current thickness, current width, and current length of the slab are hot state values, and the original thickness, original width, and original length of the slab are cold state values.

[0064] In practical applications, the present invention includes:

[0065] S101. When performing slab tracking and rejection from the operation interface, obtain the rolling data of the current slab.

[0066] S102. Call the original thickness, original width, and original length of the slab.

[0067] S103. Call the biting time, discharging time, thickness, width, length, and temperature of the slab at the outlet of the width setter.

[0068] S104. Call the current rolling pass of the slab. When the current rolling pass is greater than 0, call the thickness, width, length, and temperature at the outlet of the current pass. The current rolling pass is the number of rough rolling passes that the slab has passed through.

[0069] S105. Update the current thickness, current width, and current length of the slab based on the original thickness, original width, and original length information of the slab.

[0070] S106. Based on the steel biting time and steel discharging time of the width setter for the slab, determine whether the slab has passed through the width setter for rolling. If the slab has passed through the width setter, calculate the thermal expansion coefficient based on the outlet temperature of the width setter, convert the outlet thickness, outlet width, and outlet length of the width setter of the slab into cold state values, and update them to the current thickness, current width, and current length of the slab;

[0071] S107. Determine whether the current rolling pass number of the slab is greater than zero. If so, it means that the slab has passed through rough rolling. Then calculate the thermal expansion coefficient based on the outlet temperature of the current rolling pass, convert the outlet thickness, width, and length corresponding to the current rolling pass number of the slab into cold state values, and update them to the current thickness, current width, and current length of the slab;

[0072] S108. Use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

[0073] Embodiment:

[0074] During continuous production on a certain 2050mm hot rolling production line, two slabs A and B are being rolled simultaneously. The tapping time of slab A is earlier than that of slab B. When slab A is being rolled in the finishing mill, due to some reason, steel piling occurs. At this time, slab B, which has already been rolled in the width setter, needs to be tracked and removed from the operation interface.

[0075] If the present invention is not applied, after slab B is tracked and removed from the operation interface, since the size data such as the length, width, and thickness of slab B have changed after passing through the width setter, the production manufacturing system cannot obtain the current size data of slab B. Slab B needs to be returned to the slab storage yard. After the temperature of the slab drops to room temperature, the length, width, and thickness of slab B are manually measured and then manually input into the production manufacturing system for use as the original length, original width, and original thickness when slab B is produced again next time.

[0076] With the present invention, after the B slab is tracked and removed from the operation interface, the original thickness, original width, and original length of the B slab are first called, which are 230 mm, 1400 mm, and 9500 mm respectively; the steel biting time and steel throwing time of the sizing mill of the B slab are called, which are 05:23:40 on August 2, 2021 and 05:24:39 on August 2, 2021 respectively, and the thickness, width, length, and temperature of the slab at the exit of the sizing mill are 241.6 mm, 1255.7 mm, 10670 mm, and 1132 °C respectively; the current rolling pass of the B slab is called as 0; then based on the original thickness, original width, and original length of the B slab, the current thickness, current width, and current length values of the B slab are updated to 230 mm, 1500 mm, and 11000 mm respectively; according to the fact that the steel throwing time (05:24:39 on August 2, 2021) of the sizing mill of the B slab is greater than the steel biting time (05:23:40 on August 2, 2021), it is judged that the B slab has passed through the sizing mill rolling, so the exit temperature 1132 °C of the sizing mill is used as T and substituted into the calculation formula of the thermal expansion coefficient α.

[0077]

[0078] The thickness (241.6 mm), width (1255.7 mm), and length (10670 mm) of the slab at the exit of the sizing mill of the B slab are divided by the thermal expansion coefficient 1.0171 respectively to obtain the cold state values of the thickness, width, and length of the slab at the exit of the sizing mill of the B slab, which are 237.54 mm, 1234.59 mm, and 10491 mm respectively; since the current rolling pass of the B slab is 0, it is judged that the B slab has not passed through the rough rolling, so the current thickness, current width, and current length values of the B slab are not updated and still remain 237.54 mm, 1234.59 mm, and 10491 mm; finally, when the B slab returns to the slab yard, the current thickness (237.54 mm), current width (1234.59 mm), and current length value (10491 mm) of the B slab are updated to the production manufacturing system and used as the original dimension data for the next production of the B slab.

Claims

1. A method for automatically updating slab size data, characterized in that It includes the following steps: (1) When the slab has been produced on the hot continuous rolling production line, but due to steel piling up or equipment failure on the hot continuous rolling production line, the slab is removed from the hot continuous rolling production line and returned to the slab storage. After the operator performs the slab removal operation from the man-machine interface, the current rolling data of the slab is collected; (2) Call the original thickness, original width, and original length of the slab; Call the biting time, throwing time of the sizing press, the thickness, width, length, and temperature of the slab at the exit of the sizing press; Call the current rolling pass of the slab, the thickness, width, length, and temperature of the slab at the exit of the current grade. The current rolling pass is the number of rough rolling passes that the slab has passed through; (3) Based on the original thickness, original width, and original length information of the slab, update the current thickness, current width, and current length of the slab; (4) Based on the biting time and throwing time of the sizing press of the slab, judge whether the throwing time of the sizing press of the slab is greater than the biting time of the sizing press. If so, it is judged that the slab has passed through the sizing press rolling, and the sizing press flag bit of the slab is true. Otherwise, it is judged that the slab has passed through the sizing press rolling, and the sizing press flag bit of the slab is false; (5) Based on the sizing press flag bit of the slab, update the current thickness, current width, and current length of the slab. If the sizing press flag bit of the slab is true, calculate the thermal expansion coefficient according to the exit temperature of the sizing press, convert the exit thickness, exit width, and exit length of the sizing press of the slab into cold state values, and update them into the current thickness, current width, and current length of the slab; (6) Judge whether the current rolling pass of the slab is greater than zero. If so, it means that the slab has passed through rough rolling. Then calculate the thermal expansion coefficient based on the exit temperature of the current rolling pass, convert the exit thickness, width, and length corresponding to the current rolling pass of the slab into cold state values, and update them into the current thickness, current width, and current length of the slab; (7) Use the current thickness, current width, and current length of the slab as the original thickness, original width, and original length when the slab is produced again.

2. The method for automatically updating slab size data according to claim 1, wherein: The thermal expansion coefficient is a function related to the slab temperature. The thermal expansion coefficient is denoted as α, and the slab temperature is denoted as T. Then the calculation formula for the thermal expansion coefficient α is: 。 3. A method for automatically updating slab size data according to claim 1, characterized in that: The exit thickness of the sizing press, the exit width of the sizing press, the exit length of the sizing press, and the exit thickness, width, and length corresponding to the rough rolling pass are hot state values, that is, the values under the temperature conditions at the corresponding positions of the slab; the cold state value is obtained by dividing the hot state value of the slab by the thermal expansion coefficient, indicating the value of the slab under room temperature conditions.

4. A method for automatically updating slab size data according to claim 1, characterized in that: The current thickness, current width, and current length of the slab are hot state values, and the original thickness, original width, and original length of the slab are cold state values.

5. An apparatus for automatically updating slab size data, characterized in that: It includes a data acquisition module, a first call module, a second call module, a third call module, a first acquisition module, a second acquisition module, a third acquisition module and a control module. The data acquisition module is used to collect the current rolling data of the slab when the slab has been produced on the hot strip mill production line but needs to be removed from the hot strip mill production line and returned to the slab yard due to steel piling or equipment failure on the hot strip mill production line, and after the operator performs the slab removal operation from the man-machine interface, the current rolling data of the slab is collected. The first call module is used to call the original thickness, width and length information of the slab. The second call module is used to call the biting time, throwing time, thickness, width, length and temperature of the slab at the exit of the edger of the slab. The third call module is used to call the current rolling pass of the slab, as well as the thickness, width, length and temperature at the exit of the current pass. The current rolling pass is the number of rough rolling passes that the slab has passed through. The first acquisition module is used to obtain the current thickness, current width and current length of the slab based on the original thickness, width and length information of the slab. The second acquisition module is used to judge whether the throwing time of the slab at the edger is greater than the biting time of the slab at the edger based on the biting time and throwing time of the slab at the edger. If so, it is judged that the slab has passed through the edger rolling, and the edger flag bit of the slab is true; otherwise, it is judged that the slab has passed through the edger rolling, and the edger flag bit of the slab is false. Based on the edger flag bit of the slab, the current thickness, current width and current length of the slab are updated. If the edger flag bit of the slab is true, the coefficient of thermal expansion is calculated according to the temperature at the exit of the edger, and the thickness, width and length at the exit of the edger of the slab are converted into cold state values and updated into the current thickness, current width and current length of the slab. The third acquisition module is used to judge whether the current rolling pass is greater than zero. If so, it means that the slab has passed through rough rolling. Then, the coefficient of thermal expansion is calculated based on the temperature at the exit of the current rolling pass, and the thickness, width and length at the exit corresponding to the current rolling pass of the slab are converted into cold state values and the current thickness, current width and current length of the slab are updated. The control module is used to use the current thickness, current width and current length of the slab as the original thickness, original width and original length when the slab is produced again.

6. The device for automatically updating slab size data according to claim 5, characterized in that: The coefficient of thermal expansion is a function related to the temperature of the slab. The coefficient of thermal expansion is denoted as α, and the temperature of the slab is denoted as T. Then, the calculation formula of the coefficient of thermal expansion α is: 。 7. An apparatus for automatically updating slab size data according to claim 5, characterized in that: The thickness, width and length at the exit of the edger and the thickness, width and length at the exit corresponding to the rough rolling passes are hot state values, that is, the values of the slab under the temperature conditions at the corresponding positions.

8. The device for automatically updating slab size data according to claim 5, characterized in that: The cold state value is obtained by dividing the hot state value of the slab by the coefficient of thermal expansion, which represents the value of the slab under room temperature conditions.

9. The device for automatically updating slab size data according to claim 5, wherein: The current thickness, current width and current length of the slab are hot state values, and the original thickness, original width and original length of the slab are cold state values.

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