A full-automatic gear shifting control method and system for a coiler set

Abstract

The present application belongs to the technical field of hot rolling production line coiler set equipment, and relates to a full-automatic gear shifting control method and system for a coiler set. The method comprises the following steps: judging and triggering a gear shifting command according to the thickness of the strip steel product and the current gear position of the coiler; determining whether all gear shifting conditions are met after the gear shifting command is triggered; and changing the gear position according to the gear shifting command to replace the gear position with a target gear position when all gear shifting conditions are met. The system comprises a judging module, a determining module and a replacing module. The main control method of the full-automatic gear shifting for the coiler set is to trigger the gear shifting operation according to the thickness specification of the strip steel and the gear shifting conditions, and then to control the slow running of the coiler drum, and to control the hydraulic cylinder to act to complete the gear shifting operation under the condition of slow running, so as to realize the full-automatic gear shifting without shutdown, mode switching and manual intervention in the case of continuous production, avoid the waste of manpower, ensure the rolling rhythm, and avoid the coiling and stacking accidents with manual intervention.

Description

Technical Field

[0001] This invention belongs to the technical field of coiling unit equipment in hot rolling production lines, and specifically relates to a fully automatic gear shifting control method and system for coiling units. Background Technology

[0002] As an important piece of equipment in the hot rolling production line, the coiling unit needs to provide different speeds and torques to coil the strip steel according to the different strengths and specifications of the strip steel. This requires switching the gears of the drum reducer to switch to different reduction ratios to provide different torques for coiling the strip steel.

[0003] Currently, the control methods for gear shifting of the drum reducer in hot rolling mill coiling units across the country vary. Some hot rolling mill coiling units are designed for stop-and-shift gearing, while others are designed for one-button semi-automatic gear shifting. Even fully automatic gear shifting varies, with shifting timing (last pass of R2) and shifting methods (mode switching). The above gear shifting control methods have the following main problems: 1. Stop-and-shift gearing requires manual operation to switch the drum drive control mode to stop mode, then jogging the drum while observing the gear meshing of the reducer shifting device. Shifting is only performed when the gears are properly engaged. This shifting mode is cumbersome and requires manual on-site confirmation, wasting manpower and severely impacting the rolling rhythm; 2. Semi-automatic gear shifting is controlled remotely by the operator via HMI, achieving one-button semi-automatic shifting, but still requires manual intervention. Due to uncertainties in personnel, occasional failure to shift gears can cause a mismatch between the coiler's gear and production specifications, resulting in coiling steel pile-up accidents; 3. Fully automatic gear shifting: Fully automatic gear shifting has different control methods. Generally, it is designed to shift gears at the last pass of the roughing mill. This control method is for hot rolling lines with hot coil boxes, where there may be situations where the hot coil box and roughing mill have steel with large differences in specifications, causing gear mismatch; Some fully automatic gear shifting requires the coiler to be put into use before it is ready. This control method directly affects the production rhythm of the hot rolling line because the coiler is not ready when it is put into use.

[0004] To solve the above problems, it is necessary to design a fully automatic gear shifting control method and system for the winding unit. Summary of the Invention

[0005] To address the above problems, this invention provides a fully automatic gear shifting control method for a winding unit, the method comprising:

[0006] The shift command is triggered based on the thickness of the finished strip and the current gear of the coiler.

[0007] After triggering the shift command, determine whether all shift conditions are met;

[0008] When all shift conditions are met, the gear is changed according to the shift command, and the gear is changed to the target gear.

[0009] Preferably, the shift command specifically includes:

[0010] When h≤6.0mm, use high speed gear 2;

[0011] When 6.0mm < h < 8.0mm, maintain the original gear position;

[0012] When h≥8.0mm, use low speed gear 1;

[0013] Where h represents the thickness of the finished strip.

[0014] Preferably, the shifting conditions include the drum being in automatic mode, the coil being unloaded from the coiler, the pinch rollers not biting the steel, and the coiler being in a safe state.

[0015] Preferably, the unwound portion of the winding machine includes the winding area without emergency stop or rapid stop.

[0016] Preferably, the safety conditions of the winding machine include the following two situations:

[0017] The winding machine is not ready;

[0018] The coiler did not follow the finishing mill speed when it was ready, the finishing mill did not bite the steel, and there was no strip in the coiling area.

[0019] Preferably, changing the gear includes the following steps:

[0020] Reduce the drum speed to 0.1 m / s. When the actual speed of the drum drops to 0.1 m / s, control the electromagnetic hydraulic reversing valve to change the shifting device to the target gear.

[0021] Preferably, after changing the gear, the method further includes: detecting the shift signal of the shifting device; if the signal is normal, it indicates that the shift is complete; otherwise, it indicates that the shift is not complete.

[0022] The present invention also proposes a fully automatic shifting control system for a winding unit, the system comprising: a judgment module, a determination module, and a replacement module;

[0023] The judgment module is used to determine and trigger a gear shift command based on the thickness of the finished strip steel and the current gear of the coiler.

[0024] The determining module is used to determine whether all shifting conditions are met;

[0025] The shift module is used to change the gear to the target gear according to the shift command.

[0026] Preferably, the shift command specifically includes:

[0027] When h≤6.0mm, use high speed gear 2;

[0028] When 6.0mm < h < 8.0mm, maintain the original gear position;

[0029] When h≥8.0mm, use low speed gear 1;

[0030] Where h represents the thickness of the finished strip.

[0031] Preferably, the determining module is used to determine whether all shifting conditions are met, including the drum being in automatic mode, the coil being unloaded from the coiler, the pinch rollers not biting steel, and the coiler's safety status conditions.

[0032] The unwound coil in the winding machine includes situations where there is no emergency stop or no rapid stop in the winding area;

[0033] The safety conditions of the winding machine include the following two situations:

[0034] The winding machine is not ready;

[0035] The coiler did not follow the finishing mill speed when it was ready, the finishing mill did not bite the steel, and there was no strip in the coiling area.

[0036] Preferably, the gear-changing module is used to change the gear to the target gear according to the gear-changing command, including the following steps:

[0037] The replacement module is used to reduce the drum speed to 0.1m / s. When the actual speed of the drum drops to 0.1m / s, it controls the electromagnetic hydraulic reversing valve to change the shifting device to the target gear.

[0038] The present invention has the following beneficial effects:

[0039] The main control method of the fully automatic gear shifting of the coiling unit in this invention is to trigger the gear shifting operation when the strip thickness specification meets the gear shifting conditions, thereby controlling the coiling drum to run slowly. Under slow operation, the hydraulic cylinder is controlled to complete the gear shifting operation. This achieves fully automatic gear shifting without stopping the machine, switching modes, or human intervention during continuous production, avoiding the waste of manpower, ensuring the rolling rhythm, and preventing steel pile-up accidents during coiling without human intervention. At the same time, it can reduce the safety risks of personnel confirming gear shifting on-site.

[0040] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0041] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This invention provides a flowchart of a fully automatic gear shifting control method for a winding unit according to an embodiment of the present invention.

[0043] Figure 2 This diagram illustrates a fully automatic gear shifting control system for a winding unit according to an embodiment of the present invention.

[0044] Figure 3 A detailed flowchart of a fully automatic gear shifting control method for a winding unit according to an embodiment of the present invention is shown. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, this invention proposes a fully automatic gear shifting control method for a winding unit, the method comprising:

[0047] The shift command is triggered based on the finished strip thickness and the current gear position of the coiler. Specifically, the shift command includes: when h ≤ 6.0mm, high speed gear 2 is used; when 6.0mm < h < 8.0mm, the original gear is maintained; when h ≥ 8.0mm, low speed gear 1 is used; where h represents the finished strip thickness. In this embodiment, the strip shifts gears in the area before the flying shear (for hot rolling lines equipped with hot coil units) or in the area before the flying shear (for hot rolling lines without hot coil units) in straight-through mode.

[0048] After triggering the shift command, it is determined whether all shift conditions are met. The shift conditions include the drum being in automatic mode, the coiler having unloaded the coil, the pinch rolls not biting the steel, and the coiler's safety status conditions. The unloaded coil in the coiler includes no emergency stop or fast stop in the coiling area. The coiler's safety status conditions include the following two situations: the coiler is not ready; or the coiler is ready but does not follow the finishing mill speed and the finishing mill does not bite the steel and there is no strip in the coiling area.

[0049] When all shifting conditions are met, the gear is changed according to the shifting command to the target gear. The gear change includes the following steps: reducing the drum speed to 0.1 m / s; when the actual drum speed drops to 0.1 m / s, controlling the electromagnetic hydraulic directional valve to change the shifting device to the target gear. After changing the gear, the following steps are also included: detecting the shifting signal of the shifting device; a normal signal indicates that the shift is complete; otherwise, it indicates that the shift is incomplete.

[0050] like Figure 2 As shown, the present invention also proposes a fully automatic gear shifting control system for a winding unit, the system comprising: a judgment module, a determination module, and a replacement module;

[0051] The judgment module is used to determine the triggering of a gear shifting command based on the thickness of the finished strip steel. The gear shifting command specifically includes: when h≤6.0mm, use high speed gear 2; when 6.0mm<h<8.0mm, maintain the original gear; when h≥8.0mm, use low speed gear 1; where h represents the thickness of the finished strip steel.

[0052] The determining module is used to determine whether all shift conditions are met. The determining module is used to determine whether all shift conditions are met, including the drum being in automatic mode, the coiler having unloaded the coil, the pinch rolls not biting the steel, and the coiler safety status conditions. The unloaded coil in the coiler includes no emergency stop or no fast stop in the coiling area. The coiler safety status conditions include the following two situations: the coiler is not ready; the coiler is ready but does not follow the finishing mill speed and the finishing mill does not bite the steel and there is no strip in the coiling area.

[0053] The shifting module is used to change the gear to the target gear according to the shifting command under all shifting conditions; the shifting module is used to change the gear to the target gear according to the shifting command under all shifting conditions, including the following steps: the shifting module is used to reduce the drum speed to 0.1m / s, and when the actual speed of the drum drops to 0.1m / s, it controls the electromagnetic hydraulic reversing valve to change the shifting device to the target gear.

[0054] Specifically, in this embodiment, the workflow of the shift control system is as follows: Figure 3As shown, the first judgment module determines whether to trigger a shift command based on the thickness of the finished strip. After triggering the shift command, the determination module checks whether all shift conditions are met. If the shift conditions are met, the drum running speed is reduced to 0.1 m / s. Then, the shift module executes the shift command, controlling the electromagnetic hydraulic reversing valve to change the shift device to the target gear. After changing the gear, the shift signal of the shift device is detected. If the signal is normal, the shift is complete; otherwise, the shift has failed. More specifically, if the shift fails after the operation, the shift failure can be repaired. The specific operation is as follows: the shift time is monitored. In this embodiment, the given shift time is 10 seconds. The machine stops when the shift detection proximity switch and pressure relay do not detect a signal, i.e., when the above signals are abnormal. If the pressure detection relay of the shifting device and the proximity switch of the shifting device in the reducer fail to detect during the shifting process, an error will occur and the machine will stop. During operation, if there is no shifting command, the shifting device will not move and the gear sleeve will remain stuck in the original position. Therefore, if the proximity switch of the shifting device fails to detect a signal during operation, the coiler should stop in standby mode and continue to operate in production mode. After the standby mode is activated, an error will occur and the machine will stop. This can avoid the machine from stopping due to abnormal signal detection during operation and scrapping of steel.

[0055] Through the implementation of the above measures and continuous debugging and testing, the problems caused by manual gear shifting have been effectively solved from a technical perspective. During the gear shifting process, the coiler can achieve continuous production without controlling the rhythm. The original manual mode gear shifting took about 5 minutes to complete, while the automatic gear shifting function can switch to gear shifting operation in just 6 seconds. After the gear shifting is completed, it can be put into use immediately to prepare for coiling the next strip steel, and no on-site personnel confirmation is required. The interlocking function is fully utilized, and the safety of the gear shifting equipment is ensured, resulting in significant economic benefits.

[0056] Those skilled in the art should understand that, despite the detailed description of the present invention with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automatic gear shifting control method for a winding unit, characterized in that, The method includes: The shift command is triggered based on the thickness of the finished strip and the current gear of the coiler; the shift command specifically includes: when h≤6.0mm, use high speed gear 2; when 6.0mm<h<8.0mm, maintain the original gear; when h≥8.0mm, use low speed gear 1; where h represents the thickness of the finished strip. After triggering the shift command, it is determined whether all shift conditions are met. The shift conditions include the drum being in automatic mode, the coiler having unloaded its coil, the pinch rolls not biting the steel, and the coiler's safety status conditions. The unloaded coil in the coiler includes no emergency stop or no rapid stop in the coiling area. The coiler's safety status conditions include the following two situations: the coiler is not ready; or the coiler is ready but does not follow the finishing mill speed, the finishing mill does not bite the steel, and there is no strip steel in the coiling area. When all shift conditions are met, the gear is changed according to the shift command, and the gear is changed to the target gear.

2. The fully automatic gear shifting control method for a winding unit according to claim 1, characterized in that, Changing gears involves the following steps: Reduce the drum speed to 0.1 m / s. When the actual speed of the drum drops to 0.1 m / s, control the electromagnetic hydraulic reversing valve to change the shifting device to the target gear.

3. The fully automatic gear shifting control method for a winding unit according to claim 1, characterized in that, After changing gears, the process also includes: detecting the shift signal of the shifting device. If the signal is normal, it means that the shifting is complete; otherwise, it means that the shifting is not complete.

4. A fully automatic gear shifting control system for a winding unit, characterized in that, The system includes: a judgment module, a determination module, and a replacement module; The judgment module is used to determine and trigger a shift command based on the thickness of the finished strip and the current gear of the coiler; the shift command specifically includes: when h≤6.0mm, use high speed gear 2; when 6.0mm<h<8.0mm, maintain the original gear; when h≥8.0mm, use low speed gear 1; where h represents the thickness of the finished strip. The determining module is used to determine whether all shift conditions are met after a shift command is triggered. The shift conditions include the drum being in automatic mode, the coiler having unloaded its coil, the pinch rolls not biting the steel, and the coiler's safety status conditions. The unloaded coil in the coiler includes no emergency stop or no rapid stop in the coiling area. The coiler's safety status conditions include the following two situations: the coiler is not ready; or the coiler is ready but does not follow the finishing mill speed, the finishing mill does not bite the steel, and there is no strip in the coiling area. The shifting module is used to shift the gear to the target gear according to the shifting command, provided that all shifting conditions are met.

5. The fully automatic gear shifting control system for a winding unit according to claim 4, characterized in that, The shifting module is used to shift the gear to the target gear according to the shifting command under all shifting conditions, including the following steps: The replacement module is used to reduce the drum speed to 0.1m / s. When the actual speed of the drum drops to 0.1m / s, it controls the electromagnetic hydraulic reversing valve to change the shifting device to the target gear.

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