A steel bar rolling system

Abstract

This invention discloses a rebar rolling system, comprising: a measuring device, a control device, and a rolling mill; the measuring device measures the weight and volume of the steel billet to be rolled and transmits this data to the control device; the control device determines the density of the steel billet to be rolled based on its weight and volume, and determines the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the steel billet to be rolled based on the actual negative deviation rate of the rebar weight, the actual rebar diameter, and the steel billet density of a first steel billet rolled before the steel billet to be rolled, as well as the density of the steel billet to be rolled. This invention determines the predicted negative deviation rate of the subsequent steel billet by using the density ratio of the steel billet and the actual negative deviation of the preceding steel billet, and adjusts the rolling parameters based on the predicted negative deviation rate. This can prevent the diameter of the rolled rebar from exceeding the standard range due to density differences during steel billet production, thus avoiding interference with the control of negative deviation in rebar rolling.

Description

Technical Field

[0001] This invention relates to the field of steel bar rolling technology, and more particularly to a steel bar rolling system. Background Technology

[0002] Negative deviation rolling is a process in which the cross-sectional dimensions of finished steel are controlled within the negative deviation range of the nominal dimensions according to standards during the rolling process. Through reasonable negative deviation rolling, the yield can be improved without increasing investment. It is an important way to reduce costs and increase efficiency in the rolling production process, and steel users have a strong demand for it.

[0003] The existing method of adjusting the negative deviation of the rolled steel bar to control the negative deviation of the subsequent steel billet rolling has the problem that the cross-sectional area and inner diameter of the steel bar may exceed the standard range or the negative deviation control effect may be unsatisfactory due to the possible difference in steel billet density. Summary of the Invention

[0004] This invention provides a rebar rolling system that can determine the predicted negative deviation rate of subsequent rebars based on the density ratio of the billet and the actual negative deviation of the preceding billet, and adjust rolling parameters by adjusting the predicted negative deviation rate. This avoids the impact of density differences on the control of negative deviation in rebar rolling during billet production.

[0005] In a first aspect, embodiments of the present invention provide a steel bar rolling system, a measuring device, a control device, and a rolling mill; The measuring device is used to measure the weight and volume of the steel billet to be rolled and transmit the weight and volume of the steel billet to the control device. The control device is used to determine the density of the steel billet to be rolled based on its weight and volume, and to determine the predicted negative deviation rate of the steel billet weight and the predicted steel billet diameter based on the actual negative deviation rate of the steel weight, the actual steel diameter, and the steel billet density of the first steel billet rolled before the steel billet to be rolled, as well as the density of the steel billet to be rolled. The rolling parameters of the rolling mill are then determined based on the predicted negative deviation rate of the steel weight and the predicted steel diameter. Rolling mills are used to roll steel billets into multiple reinforcing bars according to adjusted rolling parameters.

[0006] Optionally, the measuring device is also used to measure the actual diameter, length and total weight of the steel bars after the steel billet to be rolled into multiple steel bars, and to transmit the diameter, length and total weight of the steel bars to the control device. The control device is used to determine the theoretical weight of the reinforcing bar based on its length and actual diameter, to determine the actual negative deviation rate of the reinforcing bar weight of the billet to be rolled based on the theoretical weight and the actual total weight of the reinforcing bar, and to determine whether the reinforcing bar is qualified based on the actual negative deviation rate of the reinforcing bar weight and the actual diameter of the reinforcing bar.

[0007] Optionally, rolling parameters include mill roll gap parameters.

[0008] Optionally, the control device is used to adjust the rolling parameters of the mill when at least one of the predicted negative deviation rate of the rebar weight and the predicted rebar diameter does not meet the requirements, and to use the rolling parameters used during the rolling of the first billet when both the predicted negative deviation rate of the rebar weight and the predicted rebar diameter meet the requirements.

[0009] Optionally, the measuring device includes a roller conveyor, a hot metal detection sensor, a load-bearing bracket, a load cell, a hydraulic cylinder, and a weighing instrument; Roller conveyors are used to transport steel billets to the weight measurement position on the support frame; The hot metal detection sensor is used to send a billet arrival signal to the hydraulic cylinder when it detects that the billet to be rolled has reached the weight measurement position; The hydraulic cylinder is used to drive the support bracket to lift the steel billet after receiving the signal that the steel billet has arrived in place; The load cell is connected to the support bracket and is used to detect the weight of the steel billet to be rolled on the support bracket; Weighing instruments are used to display the weight of the steel billet to be rolled.

[0010] Optionally, the measuring device further includes a second camera module and at least one first camera module, wherein the first camera module is located above the support bracket; and the second camera module is located to the side of the support bracket. The first camera module is used to capture a first image of the steel billet to be rolled, and to determine the length and width of the steel billet to be rolled based on the first image; The second camera module is used to capture a second image of the steel billet to be rolled, and to determine the height of the steel billet to be rolled based on the second image.

[0011] Optionally, the measuring device includes a roller conveyor, two or more billet basket supports, a basket lifting mechanism, a load cell, and a weighing instrument; Roller conveyors are used to transfer the steel billets to be rolled onto the billet basket support; The hot metal detection sensor is used to send a billet arrival signal to the basket lifting mechanism when it detects that the billet to be rolled has reached the position of the billet basket support. The basket lifting mechanism is used to lift the billet to be rolled after receiving the billet arrival signal; The load cell is connected to the billet basket support and is used to detect the weight of the billet to be rolled on the billet basket support; Weighing instruments are used to display the weight of the steel billet to be rolled.

[0012] Optionally, the billet basket support is provided with a billet positioning groove, in which the billet to be rolled is confined; The measuring device also includes linear laser sensors installed on both sides of the billet basket support. The linear laser sensors are used to measure the positions of the head and tail ends of the billet to be rolled to determine the length of the billet to be rolled. The measuring device also includes a third camera module and a fourth camera module; The third camera module is located above the billet basket and is used to capture a third image of the billet to be rolled, and to determine the width of the billet to be rolled based on the third image. The fourth camera module is used to capture a side image of the steel billet to be rolled, and the height of the steel billet to be rolled is determined based on the side image.

[0013] Optionally, the measuring device also includes a fifth camera module, a platform scale, and a diameter gauge; The fifth camera module is used to capture images of the reinforcing bars, and to determine the number, diameter, and length of the reinforcing bars based on these images. The platform scale is used to measure the weight of the reinforcing bars; the diameter gauge is used to measure the diameter of the reinforcing bars. Optionally, the fifth camera module includes a first camera, a second camera, a third camera, and a processing unit. The first camera is positioned flush with the end face of the bundled steel bars and is used to capture images of the flush end face of the bundled steel bars. The second and third cameras are positioned on the uneven ends of the bundled steel bars, and are used to capture images of the uneven ends of the bundled steel bars.

[0014] The processing unit is used to calculate the length of each steel bar in the bundle based on the images of the flush end face and the images of the non-flush end face, combined with the AI ​​visual distance algorithm model.

[0015] In the technical solution provided by this invention embodiment, a measuring device measures the weight and volume of a first steel billet, and a control device determines the density of the first steel billet based on its weight and volume. Then, the measuring device measures the weight and volume of a second steel billet to be rolled to determine its density. Based on the actual negative deviation rate of the rebar weight, the actual rebar diameter, and the billet density of the first steel billet, as well as the density of the second steel billet to be rolled, the device determines the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the second steel billet to be rolled. Based on these predicted negative deviation rates and predicted rebar diameters, the rolling parameters of the rolling mill are determined. The rolling mill then produces multiple rebars from the second steel billet according to the rolling parameters. Following this recursive prediction method, using the actual deviation rate of the previous steel billet as a reference, the predicted negative deviation rate of the subsequent steel billet can be determined based on the difference in density between the previous and subsequent steel billets, thus achieving control over the rebar negative deviation rate. This invention embodiment can determine the predicted negative deviation rate of subsequent steel billets based on the density ratio of the steel billets and the actual negative deviation of the previous steel billet, and adjust the rolling parameters by using the predicted negative deviation rate. This can avoid the negative deviation control of steel bar rolling caused by density differences during the billet production process.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

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

[0018] Figure 1 This is a structural schematic diagram of a steel bar rolling system provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of another steel bar rolling system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of another measuring device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of another measuring device provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] As described in the background section, existing methods for controlling negative deviation utilize the principle of constant steel density. These methods employ weighing to control negative deviation in ribbed steel bar production based on the difference between the finished product weight and the theoretical minimum weight, along with an estimated deviation. Alternatively, the actual weight of the billet can be subtracted from the rolling losses to obtain the finished billet weight. The expected total length of the rolled bar product is then calculated based on the finished billet weight, the diameter of the pre-rolled bar, and the expected negative tolerance value. However, these existing methods fail to consider the issue of inconsistent billet density. Adjusting the negative deviation of subsequent billets based on the finished steel bar's negative deviation is problematic because variations in billet density can cause the actual weight of steel bars with the same cross-sectional area and length to change with density, while their theoretical weight remains the same. Adjusting the negative deviation rate based on the difference between the actual and theoretical weight may result in deviations in the steel bar's cross-sectional area and inner diameter exceeding standard ranges, or unsatisfactory negative deviation control, due to differences in steel bar density.

[0022] Figure 1 This is a structural schematic diagram of a steel bar rolling system provided in an embodiment of the present invention. See also... Figure 1 The rebar rolling system includes: a measuring device 1, a control device 2, and a rolling mill 3; the measuring device 1 is used to measure the weight and volume of the steel billet to be rolled and transmit the weight and volume of the steel billet to be rolled to the control device; the control device 2 is used to determine the density of the steel billet to be rolled based on the weight and volume of the steel billet to be rolled, and to determine the predicted negative deviation rate of the weight of the steel billet to be rolled and the predicted diameter of the steel billet based on the actual negative deviation rate of the weight of the steel billet, the actual diameter of the steel billet, and the density of the steel billet rolled before the steel billet to be rolled, and the density of the steel billet to be rolled, and to determine the rolling parameters of the rolling mill based on the predicted negative deviation rate of the weight of the steel billet and the predicted diameter of the steel billet; the rolling mill 3 is used to roll the steel billet to be rolled into multiple steel bars according to the adjusted rolling parameters.

[0023] Among them, the steel billets to be rolled include the first steel billet to be rolled, the second steel billet to be rolled, the third steel billet to be rolled, ... the nth steel billet to be rolled.

[0024] Specifically, in controlling the negative deviation of the rebar weight, measuring device 1 first measures the weight and volume of the first steel billet to be rolled, and transmits this information to the control device 2. The control device 2 determines the density of the first steel billet based on its weight and volume. After the first steel billet is rolled, the control device 2 obtains the actual negative deviation rate of the weight of the multiple rebars rolled from it. Measuring device 1 measures the weight and volume of the second steel billet to be rolled, and the control device 2 determines its density based on this information. The control device 2 determines the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the second steel billet based on the actual negative deviation rate, actual rebar diameter, and billet density of the rolled first steel billet, as well as the density of the second steel billet. It then determines the rolling parameters based on these parameters, and the rolling mill 3 rolls the second steel billet into multiple rebars according to the adjusted rolling parameters. According to this recursive prediction method, the actual deviation rate of the previous billet to be rolled is used as a reference. Based on the difference in density between the previous billet and the next billet to be rolled, the predicted negative deviation rate of the next billet can be determined, thereby achieving control over the negative deviation rate of the reinforcing bars.

[0025] For example, suppose the first steel billet is The second steel billet to be rolled is The third steel billet to be rolled is ...the nth steel billet is The measuring device measured the first steel billet. Weight before rolling and volume and the first steel billet measured Weight before rolling and volume The data is transmitted to the control device, which then uses the first steel billet as a reference. Weight before rolling and volume The first steel billet was determined density First steel billet After rolling is completed, the control device calculates the actual negative deviation rate of the weight of multiple reinforcing bars rolled from the first steel billet. .

[0026] Measuring device 1 measures the second steel billet to be rolled. Weight before rolling and volume The data is transmitted to the control device, which 2 then transmits the data according to the requirements of the second steel billet to be rolled. Weight before rolling and volume The density of the second steel billet to be rolled is determined to be And according to the first steel billet Actual negative deviation rate of multiple rolled steel bars Actual diameter of steel bars and billet density and the density of the second steel billet to be rolled Determine the predicted negative deviation rate of the second steel billet to be rolled. And the predicted diameter of the reinforcing bars for the second steel billet to be rolled. And based on the predicted negative deviation rate of the second steel billet to be rolled. And the predicted diameter of the reinforcing bars for the second steel billet to be rolled. The rolling parameters of rolling mill 3 are determined, and rolling mill 3 rolls the second steel billet to be rolled according to the adjusted rolling parameters. The steel is rolled into multiple reinforcing bars. Control device 2 receives the second steel billet to be rolled. Actual negative deviation rate of multiple rolled steel bars .

[0027] Measuring device 1 measures the weight M3 and volume V3 of the third steel billet G3 to be rolled and transmits the data to the control device 2. The control device 2 determines the density of the third steel billet G3 based on its weight M3 and volume V3. And based on the actual negative deviation rate S2 of the weight of multiple reinforcing bars rolled from the second steel billet to be rolled, the actual reinforcing bar diameter and the density of the second steel billet to be rolled and the density of the third steel billet to be rolled Determine the predicted negative deviation rate of the third steel billet to be rolled. And the predicted diameter of the reinforcing bar for the third steel billet to be rolled. And based on the predicted negative deviation rate of the third steel billet to be rolled. And the predicted diameter of the reinforcing bar for the third steel billet to be rolled. The rolling parameters of rolling mill 3 are determined, and rolling mill 3 rolls the third steel billet G3 into multiple reinforcing bars according to the adjusted rolling parameters. Control device 2 obtains the third steel billet to be rolled. Actual negative deviation rate of multiple rolled steel bars Using the actual deviation rate of the previous billet to be rolled as a reference, and based on the difference in density between the previous and subsequent billets to be rolled, the predicted negative deviation rate of the subsequent billet can be determined, thereby achieving control over the negative deviation rate of the reinforcing bars.

[0028] In the technical solution provided by this invention embodiment, a measuring device measures the weight and volume of a first steel billet, and a control device determines the density of the first steel billet based on its weight and volume. Then, the measuring device measures the weight and volume of a second steel billet to be rolled to determine its density. Based on the actual negative deviation rate of the rebar weight, the actual rebar diameter, and the billet density of the first steel billet, as well as the density of the second steel billet to be rolled, the device determines the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the second steel billet to be rolled. Based on these predicted negative deviation rates and predicted rebar diameters, the rolling parameters of the rolling mill are determined. The rolling mill then produces multiple rebars from the second steel billet according to the rolling parameters. Following this recursive prediction method, using the actual deviation rate of the previous steel billet as a reference, the predicted negative deviation rate of the subsequent steel billet can be determined based on the difference in density between the previous and subsequent steel billets, thus achieving control over the rebar negative deviation rate. This invention embodiment can determine the predicted negative deviation rate of subsequent steel billets based on the density ratio of the steel billets and the actual negative deviation of the previous steel billet, and adjust the rolling parameters by using the predicted negative deviation rate. This can avoid the negative deviation control of steel bar rolling caused by density differences during the billet production process.

[0029] Optionally, rolling parameters include mill roll gap parameters.

[0030] See also Figure 1 Based on the above embodiments, optionally, the measuring device 1 is further used to measure the actual diameter, length, and total weight of the reinforcing bars after the steel billet to be rolled into multiple reinforcing bars, and transmit the diameter, length, and total weight of the reinforcing bars to the control device; the control device 2 is used to determine the theoretical weight of the reinforcing bars based on the length and actual diameter of the reinforcing bars, determine the actual negative deviation rate of the reinforcing bar weight of the steel billet to be rolled based on the theoretical weight and the actual total weight of the reinforcing bars, and determine whether the reinforcing bars are qualified based on the actual negative deviation rate of the reinforcing bar weight and the actual diameter of the reinforcing bars.

[0031] Wherein, the nominal diameter is assumed The theoretical weight of the steel bars per meter is .

[0032] Specifically, after the first steel billet is rolled into multiple reinforcing bars, the measuring device 1 measures the actual diameter, actual length, and total weight of the multiple reinforcing bars, and records the actual diameter and actual length of the multiple reinforcing bars. The total weight of the reinforcing bars is transmitted to the control device 2. The control device 2 determines the theoretical weight of the reinforcing bars based on their length. The actual negative deviation rate of the first steel billet was determined based on the theoretical weight and the actual total weight of multiple reinforcing bars. The measuring device 1 measures the actual diameter, actual length, and total weight of the multiple reinforcing bars after the second billet to be rolled into multiple reinforcing bars. This data is then transmitted to the control device 2, which determines the theoretical weight of the reinforcing bars based on their actual weight and negative deviation rate. The actual negative deviation rate of the second steel billet to be rolled is determined based on the theoretical weight and the actual total weight of multiple reinforcing bars. The quality of the reinforcing bars is determined based on the actual negative deviation rate of their weight and their actual diameter.

[0033] In this embodiment of the invention, the measuring device 1 measures the actual total weight, length and actual length of the steel billet rolled into multiple reinforcing bars, and the control device 2 calculates the actual negative deviation rate of the steel billet rolled into multiple reinforcing bars based on the actual total weight, length and theoretical weight of the multiple reinforcing bars, and determines whether the reinforcing bars are qualified based on the actual negative deviation rate of the weight and the actual diameter of the reinforcing bars.

[0034] See also Figure 1 Based on the above embodiments, optionally, the control device 2 is used to adjust the rolling parameters of the rolling mill 3 when at least one of the predicted negative deviation rate of the rebar weight and the predicted rebar diameter does not meet the requirements, and to use the rolling parameters used when rolling the first steel billet when both the predicted negative deviation rate of the rebar weight and the predicted rebar diameter meet the requirements.

[0035] Specifically, when at least one of the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the second steel billet to be rolled fails to meet the requirements, control device 2 adjusts the rolling parameters of the rolling mill to control the negative deviation rate. When both the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the second steel billet to be rolled meet the requirements, control device 2 uses the rolling parameters used when rolling the first steel billet. When at least one of the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the third steel billet to be rolled fails to meet the requirements, control device 2 adjusts the rolling parameters of the rolling mill to control the negative deviation rate. When both the predicted negative deviation rate of the rebar weight and the predicted rebar diameter of the third steel billet to be rolled meet the requirements, control device 2 uses the rolling parameters used when rolling the second steel billet.

[0036] In this embodiment of the invention, the control device adjusts the rolling parameters of the rolling mill based on the predicted negative deviation rate and the predicted diameter of the reinforcing bar to control the negative deviation rate.

[0037] Figure 2 This is a schematic diagram of the structure of a measuring device provided in an embodiment of the present invention. See also: Figure 2Based on the above embodiments, optionally, the measuring device includes a roller conveyor, a hot metal detection sensor 5, a support bracket 6, a load cell 10, a hydraulic cylinder 9, and a weighing instrument. The roller conveyor is used to convey the billet 4 to be rolled to the weight measurement position of the support bracket 6. The hot metal detection sensor 5 is used to send a billet 4 arrival signal to the hydraulic cylinder 9 when it detects that the billet 4 has reached the weight measurement position. After receiving the billet 4 arrival signal, the hydraulic cylinder 9 drives the support bracket 6 to lift the billet 4. The load cell 10 is connected to the support bracket 6 and is used to detect the weight of the billet 4 on the support bracket 6. The weighing instrument is used to display the weight of the billet 4.

[0038] Among them, the weight of the steel billet to be rolled is measured by static weighing.

[0039] Specifically, when the billet 4 to be rolled is conveyed to the position of the weight measuring device via the roller conveyor, the hot metal detection sensor 5 sends a signal indicating that the billet 4 has reached its position. The hydraulic cylinder 9 then rises, causing the support bracket 6 to lift the billet 4. The weight of the billet 4 is transmitted to the weighing sensor 10 through the support bracket 6, and the weighing instrument measures the weight of the billet. , and weight , and At the same time, the weight of the steel billet 4 to be rolled is transmitted to the control device.

[0040] In this embodiment of the invention, the weight of the steel billet 1 to be rolled is measured by a roller conveyor, a hot metal detection sensor 5, a bearing support 6, a weighing sensor 10, a hydraulic cylinder 9, and a weighing instrument. The system is simple and can accurately measure the weight of the steel billet 4 to be rolled, thereby enabling better negative deviation control.

[0041] See also Figure 2 Based on the above embodiments, optionally, the measuring device further includes a second camera module 8 and at least one first camera module 7. The first camera module 7 is located above the support bracket 6; the second camera module 8 is located to the side of the support bracket 6; the first camera module 7 is used to capture a first image of the steel billet 4 to be rolled, and to determine the length and width of the steel billet 4 to be rolled based on the first image; the second camera module 8 is used to capture a second image of the steel billet 4 to be rolled, and to determine the height of the steel billet 4 to be rolled based on the second image.

[0042] Specifically, when the support bracket 6 lifts the billet 4 to be rolled and the output signal of the weighing sensor 10 is stable, the first camera module 7 installed above the support bracket 6 captures a first image of the billet 4 to be rolled, and performs noise reduction, feature analysis, and obtains the length of the billet 4 from the first image of the billet 4 to be rolled. , ,and The fitted values ​​and the width of the billet to be rolled 4 , and The fitted values ​​are obtained. When the length and width of the billet 4 to be rolled are relatively long, multiple first cameras 7 are used to capture images, and the first images of the billet 4 to be rolled are stitched together and processed. A second camera 8 installed on the side of the support bracket 6 captures a second image of the billet 4 to be rolled, and noise reduction and feature analysis are performed on the second image of the billet 4 to be rolled to obtain the height of the billet 4 to be rolled. , and The fitted values ​​are obtained by stitching together the second images of the billet 4 when the billet 4 is relatively high using multiple second cameras 5. The volume of the billet 4 is then calculated based on its length, width, and height. The volume of the second steel billet to be rolled is The volume of the third steel billet to be rolled is .

[0043] In this embodiment of the invention, the length and width of the steel billet 4 to be rolled are determined by the first image captured by the first camera module 7, and the height of the steel billet 1 to be rolled is determined by the second image captured by the second camera module 8, so that the length, width and height of the steel billet 4 to be rolled can be determined quickly and accurately.

[0044] Figure 3 This is a schematic diagram of another measuring device provided in an embodiment of the present invention. Based on the above embodiment, optionally, the measuring device includes a roller conveyor, two or more billet basket supports 11, a basket lifting mechanism 12, a weighing sensor 10, and a weighing instrument; the roller conveyor is used to convey the billet 4 to be rolled onto the billet basket support 11; the hot metal detection sensor 5 is used to send a billet 4 arrival signal to the basket lifting mechanism 12 when it detects that the billet 4 has reached the position of the billet basket support 11; the basket lifting mechanism 12 is used to drive the billet basket support 11 to lift the billet 4 after receiving the billet 4 arrival signal; the weighing sensor 10 is connected to the billet basket support 11 and is used to detect the weight of the billet 4 on the billet basket support 11; the weighing instrument is used to display the weight of the billet 4.

[0045] Specifically, when the billet 4 to be rolled is conveyed to the position of the billet basket support 11 via the roller conveyor, the hot metal detection sensor 5 sends a signal indicating that the billet 4 has reached its position. The basket lifting mechanism 12 then rises, and the billet basket support 11 lifts the billet 4. The weight of the billet 4 is transmitted to the weighing sensor 10 via the basket lifting mechanism 12, and the weighing instrument measures the weight of the billet. , and The weight is , and At the same time, the weight of the steel billet 4 to be rolled is transmitted to the control device.

[0046] See also Figure 3 Based on the above embodiments, optionally, the billet basket support 11 is provided with a billet positioning groove, and the billet 4 to be rolled is restricted in the billet positioning groove; the measuring device also includes linear laser sensors disposed on both sides of the billet basket support 11, the linear laser sensors are used to measure the positions of the head and tail ends of the billet 4 to be rolled, and determine the length of the billet 1 to be rolled; the measuring device also includes a third camera module and a fourth camera module; the third camera module is disposed above the billet basket, and is used to capture a third image of the billet to be rolled, and determine the width of the billet to be rolled based on the third image; the fourth camera module is used to capture a side image of the billet to be rolled, and determine the height of the billet to be rolled based on the side image.

[0047] The linear laser sensors installed on both sides of the billet basket support 11 include a left laser sensor 13 and a right laser sensor 14.

[0048] Specifically, when the billet basket support 11 is lifted into position, the weighing sensor 10 outputs a steady-state signal, and the two laser sensors simultaneously measure the distance from the two ends of the billet to be rolled to the center point, thereby determining the length of the billet 4 to be rolled, i.e., obtaining the length of the first billet to be rolled. The length of the second steel billet to be rolled is... The length of the third steel billet to be rolled is... A third camera installed above the billet basket captures a third image, and a fourth camera installed on the side of the billet basket captures a fourth image. The images are then compared and contrasted. The width of the steel billet to be rolled was measured at time intervals. and height Based on the measured length of the steel billet to be rolled The speed of the steel billet to be rolled via roller conveyor is It is possible to calculate the running time of the steel billet on the roller conveyor. Time required for distance Based on the measured width of the steel billet to be rolled and height It is possible to calculate the cross-sectional area of ​​the steel billet to be rolled at a certain moment. The volume of the steel billet to be rolled is... .

[0049] Figure 4 This is a schematic diagram of another measuring device provided in an embodiment of the present invention. See also... Figure 4Based on the above embodiments, the measuring device may optionally include: a fifth camera module, a platform scale 16, and a diameter gauge; the fifth camera module is used to capture images of the reinforcing bars, and determine the quantity, diameter, and length of the reinforcing bars based on the images; the platform scale 16 is used to measure the weight of the reinforcing bars; and the diameter gauge is used to measure the diameter of the reinforcing bars. Specifically, when measuring the weight of multiple reinforcing bars 15, the multiple reinforcing bars are first processed through methods such as baffle collision to ensure that one end of each reinforcing bar is aligned before being packaged. After the aligned ends of the reinforcing bars 15 are repositioned by the weighing baffle, they are transported to the platform scale 16, whereby the platform scale 16 measures the total weight of the multiple reinforcing bars 15. The fifth camera module captures images of the reinforcing bars 15, and after grayscale conversion, binarization, noise reduction filtering, image segmentation, erosion, and dilation, information such as the fixed length, nominal diameter, furnace number, and corresponding billet sequence number of the reinforcing bars 15 are extracted from the captured images. The quantity, diameter, and actual length of the reinforcing bars are determined based on the information acquired from the images. After the steel billet is rolled, the actual inner diameter of the steel bar 15 is measured using a diameter gauge to check the effect of negative deviation control. An alarm is triggered if the negative deviation exceeds the control range.

[0050] As described in the background section above, another problem with the existing technology is that there is a certain difference in the total length of the finished steel bars used to calculate the theoretical weight. If the length of the steel bars is measured in the middle of the production process, it may deviate from the total length of the steel bars after they are packaged and bundled due to the quality control of the production process.

[0051] See also Figure 4 Based on the above embodiments, optionally, the fifth camera module includes a first camera 17, a second camera 18, a third camera 19, and a processing unit; the first camera 17 is disposed on the flush end face of the bundled reinforcing bars, and the first camera 17 is used to capture images of the flush end face of the bundled reinforcing bars; the second camera 18 and the third camera 19 are disposed on the non-flush end face of the bundled reinforcing bars, and the second camera 18 and the third camera 19 are used to capture images of the non-flush end face of the bundled reinforcing bars; the processing unit is used to calculate the length of each reinforcing bar in the bundle based on the images of the flush end face and the non-flush end face, combined with an AI visual distance algorithm model.

[0052] Specifically, when measuring the length of multiple reinforcing bars, the first camera 17 is installed on the side of the reinforcing bar 15 with its ends flush, capturing an image of the flush end face of the bundled reinforcing bars. The second camera 18 and the third camera 19 are installed on the side of the reinforcing bars 15 with their ends not flush, capturing images of the multiple ends of the reinforcing bars 15 with their ends not flush from different viewpoints. These images are then projected to obtain binocular images. The imaging differences of the same target on different projected images are then matched. Before the second camera 18 and the third camera 19 capture images, their distance is calibrated. The processing unit combines the distance calibration parameters of the second camera 18 and the third camera 19, the number of multiple reinforcing bars 15, and the fixed length information, and calculates the length of each reinforcing bar 15 in the bundle using an AI visual distance algorithm model. That is, the actual length of the bundle of reinforcing bars 15 is the sum of the lengths of the reinforcing bars 15.

[0053] In this embodiment of the invention, by measuring the actual length of the reinforcing bar 15, the difference between the actual length and the theoretical weight of the finished reinforcing bar is avoided, thereby avoiding the inability to achieve negative deviation control in the production process due to different lengths.

[0054] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0055] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A reinforcing bar rolling system characterized by, include: Measuring devices, control devices, and rolling mills; The measuring device is used to measure the weight and volume of the steel billet to be rolled, and transmits the weight and volume of the steel billet to the control device. The control device is used to determine the density of the steel billet to be rolled based on its weight and volume, and to determine the predicted negative deviation rate of the steel billet's weight and the predicted steel diameter based on the actual negative deviation rate of the steel weight, the actual steel diameter, and the steel billet density of the first steel billet rolled before the steel billet to be rolled, as well as the density of the steel billet to be rolled. The control device is also used to determine the rolling parameters of the rolling mill based on the predicted negative deviation rate of the steel weight and the predicted steel diameter. The rolling mill is used to roll the steel billet to be rolled into multiple reinforcing bars according to the adjusted rolling parameters.

2. The steel bar rolling system according to claim 1, characterized in that: The measuring device is also used to measure the actual diameter, length and total weight of the steel bars after the steel billet to be rolled into multiple steel bars, and to transmit the diameter, length and total weight of the steel bars to the control device. The control device is used to determine the theoretical weight of the reinforcing bar based on its length and actual diameter, to determine the actual negative deviation rate of the reinforcing bar weight of the billet to be rolled based on the theoretical weight and the actual total weight of the reinforcing bar, and to determine whether the reinforcing bar is qualified based on the actual negative deviation rate of the reinforcing bar weight and the actual diameter of the reinforcing bar.

3. The steel bar rolling system according to claim 1, characterized in that: The rolling parameters include the mill roll gap parameters.

4. The steel bar rolling system according to claim 1, characterized in that: The control device is used to adjust the rolling parameters of the rolling mill when at least one of the predicted negative deviation rate of the rebar weight and the predicted rebar diameter does not meet the requirements, and to use the rolling parameters used when rolling the first steel billet when both the predicted negative deviation rate of the rebar weight and the predicted rebar diameter meet the requirements.

5. The steel bar rolling system according to claim 1, characterized in that: The measuring device includes a roller conveyor, a hot metal detection sensor, a load-bearing bracket, a load cell, a hydraulic cylinder, and a weighing instrument. The roller conveyor is used to transport the steel billet to be rolled to the weight measurement position of the support bracket; The hot metal detection sensor is used to send a billet arrival signal to the hydraulic cylinder when it detects that the billet to be rolled has reached the weight measurement position; The hydraulic cylinder is used to drive the support bracket to lift the steel billet after receiving the signal that the steel billet has arrived. The weighing sensor is connected to the support bracket and is used to detect the weight of the steel billet to be rolled on the support bracket; The weighing instrument is used to display the weight of the steel billet to be rolled.

6. The steel bar rolling system according to claim 5, characterized in that: The measuring device further includes a second camera module and at least one first camera module, wherein the first camera module is located above the support bracket; and the second camera module is located to the side of the support bracket. The first camera module is used to capture a first image of the steel billet to be rolled, and to determine the length and width of the steel billet to be rolled based on the first image; The second camera module is used to capture a second image of the steel billet to be rolled, and to determine the height of the steel billet to be rolled based on the second image.

7. The steel bar rolling system according to claim 1, characterized in that: The measuring device includes a roller conveyor, two or more billet basket supports, a basket lifting mechanism, a weighing sensor, and a weighing instrument. The roller conveyor is used to transport the steel billet to be rolled onto the steel billet basket support; The hot metal detection sensor is used to send a billet arrival signal to the basket lifting mechanism when it detects that the billet to be rolled has reached the position of the billet basket support; The basket lifting mechanism is used to lift the steel billet to be rolled by driving the steel billet basket support after receiving the steel billet arrival signal; The weighing sensor is connected to the billet basket support and is used to detect the weight of the billet to be rolled on the billet basket support. The weighing instrument is used to display the weight of the steel billet to be rolled.

8. The steel bar rolling system according to claim 7, characterized in that: The billet basket support is equipped with a billet positioning groove, which restricts the billet to be rolled within the billet positioning groove; The measuring device also includes linear laser sensors installed on both sides of the billet basket support. The linear laser sensors are used to measure the positions of the head and tail ends of the billet to be rolled, and to determine the length of the billet to be rolled. The measuring device also includes a third camera module and a fourth camera module; The third camera module is set above the billet basket support and is used to capture a third image of the billet to be rolled, and to determine the width of the billet to be rolled based on the third image. The fourth camera module is used to capture a side image of the steel billet to be rolled, and to determine the height of the steel billet to be rolled based on the side image.

9. The steel bar rolling system according to claim 2, characterized in that: The measuring device also includes a fifth camera module, a platform scale, and a diameter measuring instrument; The fifth camera module is used to capture images of the reinforcing bars and determine the number, diameter, and length of the reinforcing bars based on the images. The platform scale is used to measure the weight of the reinforcing bars; the diameter gauge is used to measure the diameter of the reinforcing bars.

10. The steel bar rolling system according to claim 9, characterized in that: The fifth camera module includes a first camera, a second camera, a third camera, and a processing unit; The first camera is positioned flush with the end face of the bundle of reinforcing bars, and is used to capture images of the flush end face of the bundle of reinforcing bars. The second camera and the third camera are positioned on the uneven end face of the bundled steel bars, and are used to capture images of the uneven end face of the bundled steel bars; The processing unit is used to calculate the length of each steel bar in the bundle based on the images of the flush end face and the images of the non-flush end face, combined with an AI visual distance algorithm model.

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