Method and device for producing full-length bars

Abstract

The application discloses a kind of bar full length production method and device, the method includes: in the upstream and downstream of bar length flying shear, obtain the distance between hot metal detector;According to the distance between hot metal detector, the pulse equivalent of rolling mill is calculated;The pulse count value of rolling mill motor encoder is collected, and according to pulse count value and pulse equivalent, the actual length of finish rolling product is calculated, and the total pulse count value of rolling mill motor encoder is predicted according to the actual length of finish rolling product;According to pulse total count value and pulse equivalent, the predicted length of finish rolling product is calculated;Obtain length and fixed length, remove length and fixed length from the predicted length of finish rolling product, obtain non-fixed length;According to non-fixed length, flying shear tail is cut in the upstream of bar length flying shear.The application can reduce the personnel investment of collection area, improve production stability and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of bar shearing technology, and more particularly to a method and apparatus for producing full-length bars. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.

[0003] Bar stock is one of the main products of the steel industry. For a long time, bar stock products have mainly included rebar bars and round bars, which are widely used in construction, bridges, transportation, machinery, metal products and other industries. Large-diameter bars are mainly produced using ordinary bar production lines, while small-diameter bars are usually produced by ordinary bar cutting or by single-line production on high-speed bar production lines or by double-line production on double-high-speed bar production lines.

[0004] Bar stock is generally delivered in straight, fixed lengths, typically 6m, 9m, 12m, etc. During bar production, factors such as billet length, quality, temperature fluctuations, mill roll gap wear and adjustments, and tension variations between stands prevent bars from consistently achieving full length on the cooling bed, frequently resulting in non-standard length bars. The presence of non-standard lengths necessitates dedicated workstations (4-6 people) in the bar workshop's collection area to handle these tasks, leading to high labor intensity and disrupting the fully automated production process in the collection area. This requires significant manual operation, impacting production rhythm. Furthermore, shorter non-standard lengths may prevent them from passing through the cold shear and falling automatically into the scrap chute, requiring multiple shearing operations at the cold shear tail. These factors significantly reduce production efficiency.

[0005] To address the issue of non-standard length, some steel companies have adopted a technology of using fixed-weight cutting in the continuous casting process upstream of the bar mill. This has improved the situation to some extent, but the process from continuous casting to bar rolling involves multiple steps and two workshops, with many influencing factors. Factors such as the length measurement error of the continuous casting billet, the weighing error, the burn-out of the heating furnace, and the adjustment of the rolling line tolerance all affect the non-standard length and cannot completely solve the problem. Summary of the Invention

[0006] This invention provides a method for producing full-length bars to solve the problem of non-standard length in bar production lines, thereby improving production stability and efficiency. The method includes:

[0007] Hot metal detectors are installed upstream and downstream of the bar multiple-length flying shear to obtain the distance between the hot metal detectors;

[0008] The pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors;

[0009] The pulse count value of the rolling mill motor encoder is collected. Based on the pulse count value and pulse equivalent, the actual length of the finished product is calculated. The number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill are obtained. During the rolling process, the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill is recorded. Based on the number of rolling mills, the stand pulse coefficient of each rolling mill and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill, the total pulse value of the rolling mill motor is predicted.

[0010] Calculate the predicted length of the finished product based on the total pulse value and pulse equivalent.

[0011] Obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished rolled product to obtain the non-fixed length;

[0012] The tail of the flying shear is cut off upstream of the double-length flying shear according to the non-fixed length.

[0013] This invention also provides a bar stock full-length production apparatus to solve the problem of non-standard length in bar stock production lines, and to improve production stability and efficiency. The apparatus includes:

[0014] The distance prediction module is used to set up hot metal detectors upstream and downstream of the bar multiple length flying shear and obtain the distance between the hot metal detectors.

[0015] The calculation module is used to calculate the pulse equivalent of the rolling mill based on the distance between the hot metal detectors; collect the pulse count value of the rolling mill motor encoder; calculate the actual length of the finished product based on the pulse count value and the pulse equivalent; obtain the number of rolling mills in the rolling mill group and the stand pulse coefficient of each rolling mill; record the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill during the rolling process; and predict the total pulse value of the rolling mill motor based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill.

[0016] The length prediction module is used to calculate the predicted length of the finished product based on the total pulse value and the pulse equivalent.

[0017] The non-fixed length calculation module is used to obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished rolled product to obtain the non-fixed length;

[0018] The tail-cutting module is used to cut the tail of the flying shear upstream of the multiple-length flying shear according to the non-fixed length.

[0019] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for producing full-length bars.

[0020] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for producing full-length bars.

[0021] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for producing full-length bars.

[0022] In this embodiment of the invention, hot metal detectors are set upstream and downstream of the bar multiple-length flying shear to obtain the distance between the hot metal detectors; the pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors; the pulse count value of the rolling mill motor encoder is collected; the actual length of the finished product is calculated based on the pulse count value and the pulse equivalent; the number of rolling mills in the rolling mill group and the stand pulse coefficient of each rolling mill are obtained; during the rolling process, the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill is recorded; based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill, the total pulse value of the rolling mill motor is predicted; based on the total pulse value and the pulse equivalent, the predicted length of the finished product is calculated; the multiple-length length and the fixed-length length are obtained; the multiple-length length and the fixed-length length are removed from the predicted length of the finished product to obtain the non-fixed-length length; the tailing of the bar multiple-length flying shear is performed upstream of the non-fixed-length length. In this way, the total length of the finished product is measured by using the flying shear shear point signal, the pre- and post-shear hot metal detector signal, and the finished mill encoder signal. The total length of the finished product is predicted in advance by using the hot metal detector upstream of the finishing mill flying shear, the pulse count of the encoder motors of each stand of the finishing mill, and the pulse equivalent of the encoder motor of the finished mill. By combining the flying shear upstream of the finishing mill, the encoder signals of each stand of the finishing mill, and the multiple-length flying shear, a full-length production method for bar production lines can be realized. This method can solve the problem of full-length production in bar production lines with relatively small investment, reduce personnel input in the collection area, and improve production stability and efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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. In the drawings:

[0024] Figure 1 This is a flowchart of the bar stock full-length production method provided in the embodiments of the present invention;

[0025] Figure 2 This is an example diagram illustrating the calculation of mill pulse equivalents provided in an embodiment of the present invention;

[0026] Figure 3 This is an example diagram illustrating the predicted total pulse value of a rolling mill motor provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the bar full-length production apparatus provided in an embodiment of the present invention;

[0028] Figure 5 This is a structural block diagram of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0030] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0031] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0032] This invention provides a method for producing full-length bars, such as... Figure 1 As shown, it includes:

[0033] Step 101: Set up hot metal detectors upstream and downstream of the bar multiple length flying shear and obtain the distance between the hot metal detectors;

[0034] Step 102: Calculate the pulse equivalent of the rolling mill based on the distance between the hot metal detectors;

[0035] Step 103: Collect the pulse count value of the rolling mill motor encoder. Calculate the actual length of the finished product based on the pulse count value and pulse equivalent. Obtain the number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill. During the rolling process, record the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill. Based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill, predict the total pulse value of the rolling mill motor encoder.

[0036] Step 104: Calculate the predicted length of the finished product based on the total pulse value and pulse equivalent;

[0037] Step 105: Obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished product to obtain the non-fixed length;

[0038] Step 106: Cut the tail of the bar stock upstream of the multiple-length flying shear according to the non-standard length.

[0039] The full-length bar production method provided in this embodiment of the invention can completely solve the problem of full-length bar production line with a small investment. It can be used in both ordinary bar production lines and high-speed bar production lines. After the system is put into operation, the operating expenses of the collection area can be greatly reduced, and the production stability and efficiency can be greatly improved.

[0040] Figure 2 This is an example diagram illustrating the calculation of mill pulse equivalents provided in an embodiment of the present invention, such as... Figure 2 As shown, in this embodiment of the invention, the pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors, including:

[0041] Step 201: Obtain the pulse count difference between the hot metal detectors, and calculate the first-cut pulse equivalent based on the pulse count difference between the hot metal detectors and the distance between the hot metal detectors;

[0042] Step 202: Obtain the pulse count difference and distance between the shearing point and the downstream hot metal detector. Calculate the non-first-cut pulse equivalent based on the pulse count difference and distance between the shearing point and the downstream hot metal detector.

[0043] Step 203: Calculate the average value of the pulse equivalent of the first cut and the pulse equivalent of the non-first cut, and use the average value as the pulse equivalent of the rolling mill.

[0044] In practice, each shear cut of the bar multiple length flying shear generates a shear blade closure point signal (shear point). A hot metal monitor (HMD_1, HMD_2) is set up upstream and downstream of the bar multiple length flying shear. The pulse equivalent of the first shear cut is calculated using the distance between HMD_1 and HMD_2 (HMD1_2) and the pulse count difference (Cnts1_2) between the finished mill encoders of HMD_2 and HMD_1.

[0045] The first-cut pulse equivalent LPP1 = (HMD1_2) / (Cnts1_2); where HMD1_2 is the distance between HMD_1 and HMD_2, and Cnts1_2 is the pulse count difference.

[0046] The pulse equivalent after the first cut is calculated based on the distance from the shearing point to the post-shear hot metal detector (HMD2) (HMD2_CPT) and the pulse count difference (CntsHMDx) between HMD2 and the finished mill encoder at the shearing point.

[0047] After the first cut, the pulse equivalent LPPx = (HMD2_CPT) / CntsHMDx; where HMD2_CPT is the distance from the shearing point to the post-shear hot metal detector (HMD2), and CntsHMDx is the pulse count difference of the mill encoder.

[0048] This yields the instantaneous pulse equivalent of the rolled piece before each shearing cut, enabling real-time and accurate measurement of the rolled piece length.

[0049] Figure 3 This is an example diagram illustrating the predicted total pulse value of a rolling mill motor provided in an embodiment of the present invention, such as... Figure 3 As shown, in one embodiment, predicting the total number of pulses from the mill motor based on the actual length of the finished rolled product includes:

[0050] Step 301: Obtain the number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill. During the rolling process, record the total pulse count of the motor encoder between the biting and throwing of steel in each stand of the rolling mill.

[0051] In practice, the encoder count of the mill motor in use is recorded at the moment the tail of the rolled piece leaves the hot metal detector (HMD0) upstream of the flying shear upstream of the finishing mill. Based on the principle of equal flow rate per second, the encoder count of the mill motor for each stand in the finishing mill unit has a linear relationship, calculated using the following formula:

[0052] ki=Cw1 / Cwi

[0053] Cir=Cwi -Ci_0

[0054] in,

[0055] i represents the number of the finishing mill in use, i=2,3,..., the last finishing mill is numbered i=1, the second to last finishing mill is numbered i=2, and so on;

[0056] ki is the pulse coefficient of rack i;

[0057] Cir is the increment of the motor encoder pulse count from the moment the tail of the rolled piece leaves the upstream hot metal detector HMD0 of the upstream flying shear of the finishing mill to the moment the i-stand finishing mill throws the steel;

[0058] Cw1 is the total value of the encoder pulses of the finishing mill motor between the head and tail of the finished roll passing through the hot metal detector HMD1 at the finish mill exit.

[0059] Cwi is the total value of the encoder pulses of the motor between the steel biting and throwing of the i-stand finishing mill;

[0060] Ci_0 is the encoder count value of the i-th finishing mill motor that has been put into use at the moment when the tail of the rolled piece leaves the upstream hot metal detector HMD0 of the upstream flying shear of the finishing mill.

[0061] Step 302: Based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the steel biting and throwing of each in-use rolling mill, predict the total pulse value of the rolling mill motor.

[0062] In practice, the total pulse value Cnts_F1_p of the rolling mill motor is calculated using the following formula:

[0063] Cnts_F1_p = (C2_0 + C2r) k2 +(C3_0+C3r) k3+...+(Ci_0+Cir) ki) / (N-1)

[0064] In the formula,

[0065] i represents the number of the finishing mill that is put into operation, i=2,3,..., the last finishing mill is numbered i=1, the second to last finishing mill is numbered i=2, and so on;

[0066] ki is the pulse coefficient of rack i;

[0067] k2 is the pulse coefficient for two racks;

[0068] k3 is the pulse coefficient for 3 racks;

[0069] Ci_0 is the encoder count value of the i-stand finishing mill motor that has been activated at the moment when the tail of the rolled piece leaves the hot metal detector HMD0 upstream of the flying shear upstream of the finishing mill. This count value is cleared to 0 on the rising edge of the steel bite signal of this stand.

[0070] C2_0 is the encoder count value of the two finishing mill motors that have been put into use at the moment when the tail of the rolled piece leaves the hot metal detector HMD0 upstream of the flying shear upstream of the finishing mill.

[0071] C3_0 is the encoder count value of the three finishing mill motors that have been put into use at the moment when the tail of the rolled piece leaves the hot metal detector HMD0 upstream of the flying shear upstream of the finishing mill.

[0072] Cir is the increment of the motor encoder count from the moment the tail of the rolled piece leaves the upstream hot metal detector HMD0 of the upstream flying shear of the finishing mill to the moment the i-stand finishing mill throws the steel;

[0073] C2r is the increment of the motor encoder count from the moment the tail of the rolled piece leaves the upstream hot metal detector HMD0 of the upstream flying shear of the finishing mill to the moment the steel is thrown out of the second finishing mill.

[0074] C3r is the increment of the motor encoder count from the moment the tail of the rolled piece leaves the upstream hot metal detector HMD0 of the upstream flying shear of the finishing mill to the moment the steel is thrown out of the 3rd finishing mill;

[0075] N represents the number of finishing mills put into operation.

[0076] In one embodiment, the predicted length of the finished product is calculated based on the total pulse value and the pulse equivalent, including:

[0077] Calculate the self-learning compensation value for the predicted length;

[0078] Based on the total pulse value and pulse equivalent of the rolling mill motor, the predicted length self-learning compensation value is added as an influencing factor to calculate the predicted length of the finished product.

[0079] In practice, the following formula is used to predict the finished product length Lw:

[0080] Lw = Cnts_F1_p LPP_avr +Lw_adj

[0081] Wherein, Cnts_F1_p is the predicted total pulse value of the finishing mill for this steel strip; LPP_avr is the average value of the pulse equivalent measured according to 1); Lw_adj is the self-learning compensation value for the predicted finishing length, calculated as follows:

[0082] Lw_adj = (L_F1 - Lw) / Nf

[0083] in,

[0084] L_F1 is the actual total length of the finished precision-rolled product, which is the sum of the lengths of each multiple length.

[0085] Lw represents the predicted total length of the finished finished product.

[0086] Nf represents the number of filtering iterations.

[0087] In one embodiment, removing multiple lengths and fixed lengths from the predicted length of the finished rolled product to obtain a non-fixed length includes:

[0088] Obtain the multiple length, and calculate the final multiple length based on the predicted length of the finished rolled product and the multiple length.

[0089] Obtain the fixed length, and predict the non-fixed length based on the final multiple length and the fixed length.

[0090] In practice, the length L_tb of the final segment should be calculated using the following formula:

[0091] L_tb = Lw - INT(Lw / Lb) Lb

[0092] Where Lb is the multiple length; INT(Lw / Lb) is the predicted finished length divided by the multiple length and then rounded down, where Lw is the predicted finished length.

[0093] Predict the non-standard length L_nd of the final segment using the following formula.

[0094] L_nd = L_tb - INT(L_tb / Ld) Ld - Lb_add

[0095] Where Ld is the fixed length; Lb_add is the additional length of the multiple length, used for cutting the head and tail lengths of the flying shear; L_tb is the length of the last multiple length; and INT(L_tb / Ld) is the last multiple length L_tb divided by the fixed length and then rounded down.

[0096] Calculate the upstream fly shear tail length L_TCUT of the finishing mill using the following formula:

[0097] L_TCUT =L_nd V1 / V2

[0098] Where V1 is the upstream speed of the finishing mill; V2 is the exit speed of the finishing mill.

[0099] By using the predicted non-standard length as the tail length and sending the tail length to the upstream flying shear of the finishing mill, the non-standard length can be eliminated, thus achieving full-length production.

[0100] This invention also provides a bar stock full-length production apparatus, as described in the following embodiments. Since the principle by which this apparatus solves the problem is similar to the bar stock full-length production method, the implementation of this apparatus can be referred to the implementation of the method, and repeated details will not be elaborated further.

[0101] Figure 4This is a schematic diagram of the bar full-length production apparatus provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the device includes:

[0102] Distance prediction module 401 is used to set hot metal detectors upstream and downstream of the bar multiple length flying shear and obtain the distance between the hot metal detectors;

[0103] The calculation module 402 is used to calculate the pulse equivalent of the rolling mill based on the distance between the hot metal detectors; collect the pulse count value of the rolling mill motor encoder; calculate the actual length of the finished product based on the pulse count value and the pulse equivalent; obtain the number of rolling mills in the rolling mill group and the stand pulse coefficient of each rolling mill; record the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill during the rolling process; and predict the total pulse value of the rolling mill motor based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill.

[0104] The length prediction module 403 is used to calculate the predicted length of the finished product based on the total pulse value and the pulse equivalent.

[0105] The non-fixed length calculation module 404 is used to obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished product to obtain the non-fixed length;

[0106] The tail-cutting module 405 is used to cut the tail of the bar multiple length flying shear according to the non-fixed length upstream of the flying shear.

[0107] In one embodiment, the calculation module 402 is specifically used for:

[0108] Obtain the pulse count difference between the hot metal detectors, and calculate the first-cut pulse equivalent based on the pulse count difference between the hot metal detectors and the distance between the hot metal detectors;

[0109] Obtain the pulse count difference and distance between the shear point and the downstream hot metal detector, and calculate the non-first-cut pulse equivalent based on the pulse count difference and distance between the shear point and the downstream hot metal detector;

[0110] The average value of the pulse equivalent of the first cut and the pulse equivalent of the non-first cut is calculated, and the average value is taken as the pulse equivalent of the rolling mill.

[0111] In one embodiment, the calculation module 402 is specifically used for:

[0112] Obtain the number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill. During the rolling process, record the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill.

[0113] Based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill stand, the total pulse value of the rolling mill motor is predicted.

[0114] In one embodiment, the length prediction module 403 is specifically used for:

[0115] Calculate the self-learning compensation value for the predicted length;

[0116] Based on the total pulse value and pulse equivalent of the rolling mill motor, the predicted length self-learning compensation value is added as an influencing factor to calculate the predicted length of the finished product.

[0117] In one embodiment, the non-fixed-length calculation module 404 is specifically used for:

[0118] Obtain the multiple length, and calculate the final multiple length based on the predicted length of the finished rolled product and the multiple length.

[0119] Obtain the fixed length, and predict the non-fixed length based on the final multiple length and the fixed length.

[0120] Based on the aforementioned inventive concept, such as Figure 5 As shown, the present invention also proposes a computer device 500, including a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 530, it implements the aforementioned bar full-length production method.

[0121] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for producing full-length bars.

[0122] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for producing full-length bars.

[0123] In summary, in this embodiment of the invention, hot metal detectors are set upstream and downstream of the bar multiple-length flying shear to obtain the distance between the hot metal detectors; the pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors; the pulse count value of the rolling mill motor encoder is collected; the actual length of the finished product is calculated based on the pulse count value and the pulse equivalent; the number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill are obtained; during the rolling process, the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill is recorded; based on the number of rolling mills, the stand pulse coefficient of each rolling mill, and the total pulse count of the motor encoder between the biting and throwing of steel in each in-use rolling mill, the total pulse value of the rolling mill motor is predicted; based on the total pulse value and the pulse equivalent, the predicted length of the finished product is calculated; the multiple-length length and the fixed-length length are obtained; the multiple-length length and the fixed-length length are removed from the predicted length of the finished product to obtain the non-fixed-length length; the tailing of the bar multiple-length flying shear is performed upstream of the bar multiple-length flying shear based on the non-fixed-length length. In this way, the total length of the finished product is measured by using the flying shear shear point signal, the pre- and post-shear hot metal detector signal, and the finished mill encoder signal. The total length of the finished product is predicted in advance by using the hot metal detector upstream of the finishing mill flying shear, the pulse count of the encoder motors of each stand of the finishing mill, and the pulse equivalent of the encoder motor of the finished mill. By combining the flying shear upstream of the finishing mill, the encoder signals of each stand of the finishing mill, and the multiple-length flying shear, a full-length production method for bar production lines can be realized. This method can solve the problem of full-length production in bar production lines with relatively small investment, reduce personnel input in the collection area, and improve production stability and efficiency.

[0124] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0125] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0126] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0127] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0128] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for producing full-length bars, characterized in that, include: Hot metal detectors are installed upstream and downstream of the bar multiple-length flying shear to obtain the distance between the hot metal detectors; The pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors; The total pulse value of the encoder of the last stand of the downstream mill unit is collected when the finished product passes through the downstream hot metal detector. Based on the collected total pulse value and pulse equivalent, the actual length of the finished product is calculated, the number of mills in the mill unit and the stand pulse coefficient of each mill are obtained, and the total pulse count of the encoder of the motor between the biting and throwing of steel in each stand of the rolling mill is recorded during the rolling process. Based on the number of mills, the stand pulse coefficient of each mill and the total pulse count of the encoder of the motor between the biting and throwing of steel in each stand of the rolling mill, the total pulse value of the mill motor is predicted. Calculate the predicted length of the finished product based on the predicted total pulse value and pulse equivalent of the rolling mill motor; Obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished rolled product to obtain the non-fixed length; The tail of the flying shear is cut upstream of the bar multiple length flying shear according to the non-fixed length; The stand pulse coefficient of each rolling mill is: the ratio of the total pulse value of the encoder of the last stand downstream of the rolling mill unit between the head and tail of the finished product passing through the downstream hot metal detector to the total pulse value of the encoder of the motor between the corresponding in-use rolling mill between steel biting and steel throwing. Based on the predicted total pulse value and pulse equivalent of the rolling mill motor, the predicted length of the finished product is calculated, including: Calculate the self-learning compensation value for the predicted length; Based on the predicted total pulse value and pulse equivalent of the rolling mill motor, the predicted length self-learning compensation value is added as an influencing factor to calculate the predicted length of the finished product.

2. The method as described in claim 1, characterized in that, The pulse equivalent of the rolling mill is calculated based on the distance between the hot metal detectors, including: Obtain the pulse count difference between the hot metal detectors, and calculate the first-cut pulse equivalent based on the pulse count difference between the hot metal detectors and the distance between the hot metal detectors; Obtain the pulse count difference and distance between the shear point and the downstream hot metal detector, and calculate the non-first-cut pulse equivalent based on the pulse count difference and distance between the shear point and the downstream hot metal detector; The average value of the pulse equivalent of the first cut and the pulse equivalent of the non-first cut is calculated, and the average value is taken as the pulse equivalent of the rolling mill.

3. The method as described in claim 1, characterized in that, The non-standard length is obtained by removing the multiple length and standard length from the predicted length of the finished rolled product, including: Obtain the multiple length, and calculate the final multiple length based on the predicted length of the finished rolled product and the multiple length. Obtain the fixed length, and predict the non-fixed length based on the final multiple length and the fixed length.

4. A bar stock full-length production apparatus, characterized in that, include: The distance prediction module is used to set up hot metal detectors upstream and downstream of the bar multiple length flying shear and obtain the distance between the hot metal detectors. The calculation module is used to calculate the pulse equivalent of the rolling mill based on the distance between the hot metal detectors; The total pulse value of the encoder of the last stand downstream of the rolling mill unit is collected when the finished product passes through the downstream hot metal detector. Based on the collected total pulse value and pulse equivalent, the actual length of the finished product is calculated, the number of rolling mills in the rolling mill unit and the stand pulse coefficient of each rolling mill are obtained, and the total pulse count of the encoder of the motor between the biting and throwing of steel in each in-use rolling mill is recorded during the rolling process. Based on the number of rolling mills, the stand pulse coefficient of each rolling mill and the total pulse count of the encoder of the motor between the biting and throwing of steel in each in-use rolling mill, the total pulse value of the rolling mill motor is predicted. The length prediction module is used to calculate the predicted length of the finished product based on the total pulse value and pulse equivalent of the predicted mill motor. The non-fixed length calculation module is used to obtain the multiple length and fixed length, and remove the multiple length and fixed length from the predicted length of the finished rolled product to obtain the non-fixed length; The tail-cutting module is used to cut the tail of the bar multiple-length flying shear based on the non-fixed length upstream of the flying shear. The stand pulse coefficient of each rolling mill is: the ratio of the total pulse value of the encoder of the last stand downstream of the rolling mill unit between the head and tail of the finished product passing through the downstream hot metal detector to the total pulse value of the encoder of the motor between the corresponding in-use rolling mill between steel biting and steel throwing. The length prediction module is specifically used for: Calculate the self-learning compensation value for the predicted length; Based on the predicted total pulse value and pulse equivalent of the rolling mill motor, the predicted length self-learning compensation value is added as an influencing factor to calculate the predicted length of the finished product.

5. The apparatus as described in claim 4, characterized in that, The calculation module is specifically used for: Obtain the pulse count difference between the hot metal detectors, and calculate the first-cut pulse equivalent based on the pulse count difference between the hot metal detectors and the distance between the hot metal detectors; Obtain the pulse count difference and distance between the shear point and the downstream hot metal detector, and calculate the non-first-cut pulse equivalent based on the pulse count difference and distance between the shear point and the downstream hot metal detector; The average value of the pulse equivalent of the first cut and the pulse equivalent of the non-first cut is calculated, and the average value is taken as the pulse equivalent of the rolling mill.

6. The apparatus as claimed in claim 4, characterized in that, The non-standard length calculation module is specifically used for: Obtain the multiple length, and calculate the final multiple length based on the predicted length of the finished rolled product and the multiple length. Obtain the fixed length, and predict the non-fixed length based on the final multiple length and the fixed length.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 3.

9. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 3.

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