Anti-steel pile rolling production line and anti-steel pile method

Abstract

Embodiments of the present invention provide a steel pile prevention production line and a steel pile prevention method, relating to the technical field of special rolling mills. The steel pile prevention production line includes a processor, a finishing mill, a scanner assembly, and a reducing and sizing mill. The scanner assembly is installed between the finishing mill and the reducing and sizing mill. The scanner assembly is used to scan the vibration frequency of the rolled piece in real time. The processor is connected to the scanner assembly and is used to determine, based on the vibration frequency, whether the tension value of the rolled piece is likely to cause excessive piles. When the vibration frequency or tension value exceeds the standard value, the processor automatically adjusts the speed of the conveying motor of the finishing mill and notifies the operator to avoid tension loss in the channel and the occurrence of steel pile accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of special rolling mills, and in particular to an anti-steel pile rolling production line and an anti-steel pile method. Background Art

[0002] Currently, in high-speed wire rod rolling mills with modules, the tension between the 8P (eight finishing mills) and the modules is typically determined by tapping or moving the midpoint of the workpiece between the stands with an iron bar, using feel and observing the vibration of the workpiece to determine the tension between the stands. Manual tension determination is prone to errors, and inadequate tension control can shorten equipment lifespan and even cause steel pile-up accidents. Summary of the Invention

[0003] The purpose of the present invention includes providing a steel piling prevention rolling production line and a steel piling prevention method, which can automatically and accurately prevent steel piling accidents from occurring in the rolling production line.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides an anti-steel piling rolled piece production line, which includes a processor, a finishing mill group, a scanner assembly and a sizing reducing mill, wherein the scanner assembly is installed between the finishing mill group and the sizing reducing mill, and the scanner assembly is used to scan the vibration frequency of the rolled piece in real time. The processor is connected to the scanner assembly, and the processor is used to adjust the speed of the conveying motor of the finishing mill group according to the vibration frequency to reduce the tension value of the rolled piece and prevent steel piling.

[0006] The beneficial effects of the anti-steel pile rolling production line provided in this embodiment include:

[0007] By installing a scanner assembly between the finishing mill and the reducing and sizing mill, the vibration frequency of the rolled piece can be scanned in real time. The vibration frequency can also reflect the tension value of the rolled piece to determine whether the tension value of the rolled piece tends to cause over-piling. When the vibration frequency or tension value exceeds the standard value, the speed of the conveying motor of the finishing mill is automatically adjusted and the operator is prompted to avoid tension out of control in the channel and cause steel piling accidents.

[0008] In an optional embodiment, the scanner assembly includes a first scanner and a second scanner, which form a preset angle a between the first scanner and the second scanner, and simultaneously scan the vibration frequency of the rolled piece. The processor is used to receive the vibration frequency of the rolled piece obtained by the first scanner and the second scanner, and synthesize the vibration frequencies in two directions to obtain the vibration frequency of the rolled piece in space.

[0009] In this way, the vibration frequencies of the rolled piece in two directions obtained by scanning with the first scanner and the second scanner are synthesized to obtain the vibration frequency of the rolled piece in space, which can more accurately reflect the actual vibration frequency of the rolled piece.

[0010] In an optional embodiment, the preset angle a between the first scanner and the second scanner is 45° to 120°.

[0011] In this way, the processor synthesizes the vibration frequencies in two directions, and the calculation is simple and the calculation results are accurate.

[0012] In an optional embodiment, the processor is used to adjust the speed of the conveying motor of the finishing mill group according to the vibration frequency so that the vibration frequency is within a normal reference range.

[0013] In an optional embodiment, the normal reference range of the head of the rolled piece is 7-11, the normal reference range of the middle of the rolled piece is 2-4, and the normal reference range of the tail of the rolled piece is 6-10.

[0014] In an optional embodiment, the processor is used to control the finishing mill to slow down when the vibration frequency exceeds a normal reference range, and to control the finishing mill to speed up when the vibration frequency does not reach the normal reference range.

[0015] In this way, when the vibration frequency exceeds the normal reference range, the speed of the finishing mill can be controlled to slow down, so as to reduce the vibration frequency of the rolled piece. When the vibration frequency does not reach the normal reference range, the speed of the finishing mill can be controlled to increase, so as to increase the vibration frequency of the rolled piece, thereby returning the vibration frequency of the rolled piece to the normal reference range, avoiding excessive tension of the rolled piece and causing steel piling.

[0016] In a second aspect, the present invention provides a method for preventing steel pile-up, the method comprising:

[0017] S1: Real-time detection of the vibration frequency of the workpiece between the finishing mill and the reducing and sizing mill;

[0018] S2: According to the vibration frequency, the speed of the conveying motor of the finishing mill is adjusted to reduce the tension value of the rolled piece and prevent steel piling.

[0019] In an optional embodiment, S1 includes:

[0020] The first scanner and the second scanner are arranged at a preset angle a to respectively detect the vibration frequencies of the rolled piece in two directions and synthesize the vibration frequencies in space.

[0021] In an optional embodiment, S2 includes:

[0022] According to the vibration frequency, the speed of the conveying motor of the finishing mill is adjusted to make the vibration frequency within the normal reference range.

[0023] In an optional embodiment, before S1, the method for preventing steel piling further includes:

[0024] Collect the normal reference range of the vibration frequency of the rolled product between the finishing mill and the sizing mill.

[0025] In this way, the normal reference range of the vibration frequency can be collected. During the operation of the rolling production line, the vibration frequency of the rolled piece collected in real time can be compared with the normal base range, so as to accurately and quickly determine whether the rolled piece has the risk of steel piling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of an anti-pile steel rolling production line provided by a first embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the installation of the first scanner and the second scanner;

[0029] Figure 3 This is a flow chart of a method for preventing steel piling provided by a first embodiment of the present invention.

[0030] Icon: 100-anti-pile steel rolled product line; 1-finishing rolling mill; 2-reducing and sizing mill; 3-first scanner; 4-second scanner; 200-rolled product. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0034] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] First embodiment

[0038] Please refer to Figure 1 and Figure 2 The finishing mill group 1 and the reducing and sizing mill 2 are two adjacent continuous rolling mills. When the workpiece 200 is bitten into the reducing and sizing mill 2 from the finishing mill group 1, the continuous rolling relationship is established.

[0039] In practice, it has been discovered that the tension between the finishing mill 1 and the reducing mill 2 causes changes in the vibration frequency of the workpiece 200 between the finishing mill 1 and the reducing mill 2. The inventors' research has shown that this vibration frequency change is closely related to the occurrence of steel piling. The greater the tension in the workpiece 200 between the finishing mill 1 and the reducing mill 2, the faster the workpiece 200 moves, and thus the greater the vibration frequency of the workpiece 200. Therefore, by monitoring the vibration frequency of the workpiece 200 between the finishing mill 1 and the reducing mill 2 in real time, it is possible to monitor the tension in the workpiece 200 and indirectly determine whether a steel piling accident will occur, allowing measures to be taken to prevent such an occurrence. Furthermore, the acceleration of the vibration frequency of the workpiece 200 between the finishing mill group 1 and the reducing sizing mill 2 indicates that the metal flow rate between the finishing mill group 1 and the reducing sizing mill 2 and the speed of the workpiece 200 are no longer matched, resulting in an acceleration of the vibration frequency of the workpiece 200. When the vibration frequency of the workpiece 200 is accelerated, the finishing mill group 1 is controlled to slow down, otherwise it is controlled to speed up, otherwise steel piling may occur. In this way, through the speed regulation of the finishing mill group 1, the vibration frequency of the workpiece 200 between the finishing mill group 1 and the reducing sizing mill 2 is within the normal standard range, so as to realize micro-tension rolling between the finishing mill group 1 and the reducing sizing mill 2.

[0040] Therefore, this embodiment provides an anti-steel piling rolled product production line 100, which includes a processor (not shown in the figure), a finishing mill group 1, a scanner assembly and a reducing and sizing rolling mill 2, wherein the scanner assembly is installed between the finishing mill group 1 and the reducing and sizing rolling mill 2, and the scanner assembly is used to scan the vibration frequency of the rolled product 200 in real time, and predict the possible steel piling situation by real-time monitoring of the vibration frequency so as to take measures in advance.

[0041] The vibration frequency refers to the rate at which the workpiece 200 vibrates. The higher the vibration frequency, the faster the oscillation, and the more likely it is to cause a steel pile accident. The vibration frequency can be determined by the number of vibration cycles of the vibrating workpiece 200 per second. If the workpiece 200 experiences 5 vibration cycles per second, the vibration frequency is 5. Because rolling speed, groove wear, and guide failure affect the vibration frequency between the finishing mill 1 and the reducing and sizing mill 2, the vibration frequency of the workpiece 200 between the finishing mill 1 and the reducing and sizing mill 2 after the start of rolling is stabilized is used as the benchmark.

[0042] The processor can be a PLC, which is connected to the scanner assembly. The processor is used to determine whether the tension value of the rolled piece 200 tends to cause over-stacking based on the vibration frequency. When the vibration frequency or tension value exceeds the standard value, the speed of the conveying motor of the finishing mill group 1 is automatically adjusted, and the operator is prompted to avoid tension loss in the channel and cause steel piling accidents.

[0043] The scanner assembly includes a first scanner 3 and a second scanner 4 . The first scanner 3 and the second scanner 4 are both aimed at the rolled piece 200 to scan the vibration frequency of the rolled piece 200 in real time.

[0044] In this embodiment, the first scanner 3 and the second scanner 4 form a preset angle a between them, and scan the vibration frequency of the rolled piece 200 at the same time. The first scanner 3 can scan the vibration frequency of the rolled piece 200 in one direction, and the second scanner 4 can scan the vibration frequency of the rolled piece 200 in another direction. The vibration frequencies in the two directions are processed and synthesized to accurately detect the vibration frequency of the scanning point on the rolled piece 200 in space.

[0045] Preferably, the preset angle a between the first scanner 3 and the second scanner 4 is 45° to 120°, and specifically 45°, 90° or 120° can be selected. In this way, the processor can synthesize the vibration frequencies in two directions with simple calculation and accurate calculation results.

[0046] The processor is used to receive the vibration frequency of the rolled piece 200 scanned by the first scanner 3 and the second scanner 4, and analyze it to obtain the tension value of the rolled piece 200 and display it on the HMI screen. When the tension value exceeds the standard value, the processor automatically pre-adjusts the speed and prompts the operator to avoid the tension value in the channel from getting out of control and causing steel piling accidents.

[0047] Of course, the processor can also directly determine whether the vibration frequency of the workpiece 200 exceeds the normal reference range. If the vibration frequency exceeds the normal reference range, the finishing mill group 1 is controlled to slow down, thereby reducing the vibration frequency of the workpiece 200. If the vibration frequency does not reach the normal reference range, the finishing mill group 1 is controlled to speed up, thereby increasing the vibration frequency of the workpiece 200, thereby returning the vibration frequency of the workpiece 200 to the normal reference range, thereby avoiding excessive tension in the workpiece 200 and causing steel piling. When controlling the speed increase of the finishing mill group 1, the principle of small incremental steps should be followed. The vibration of the workpiece 200 between the finishing mill group 1 and the reducing and sizing mill 2 should be observed while the speed is increased.

[0048] Take the rolling stock 200 undergoing eight rolling passes as an example: the normal rolling speed of the rolling stock 200 from the finishing mill group 1 to the sizing mill 2 is 40 m / s.

[0049] The normal reference range of the vibration frequency of the rolled piece 200 between the finishing mill group 1 and the sizing mill 2 is as follows: the normal reference range of the vibration frequency of the head of the rolled piece 200 is 7-11, the normal reference range of the vibration frequency of the middle part of the rolled piece 200 is 2-4, and the normal reference range of the vibration frequency of the tail of the rolled piece 200 is 6-10.

[0050] Taking the vibration frequency of the head of the rolled piece 200 as the reference value, the speed of the conveying motor of the finishing mill 1 is adjusted using the reference value of the vibration frequency, so that the vibration frequencies of the head, middle and tail sections of the rolled piece 200 are within the allowable range, and the tension value between the finishing mill 1 and the reducing and sizing mill 2 is adjusted according to the reference value of the vibration frequency, so as to achieve micro-tension rolling.

[0051] Specifically, when the rolling speed of the finishing mill 1 (that is, the conveying speed of the conveyor motor) is 40 m / s and the vibration frequency of the workpiece 200 exceeds 11, the processor issues a warning, indicating that the tension value in this channel is about to get out of control. When the vibration frequency of the workpiece 200 exceeds 15, it indicates that the tension value is out of control and will cause a steel pile accident. The rolling speed of the finishing mill 1 is automatically controlled to reduce to avoid the steel pile accident.

[0052] The normal reference range after stable rolling is: the vibration frequency of the middle portion of the workpiece 200 is 2-4. When the rolling guide of finishing mill 1 fails, the vibration frequency of the workpiece 200 between finishing mill 1 and reducing mill 2 is 10-12, indicating complete guide failure. Before the rolling guide of finishing mill 1 fails, if the vibration frequency of the workpiece 200 between finishing mill 1 and reducing mill 2 is 7-9, the guide is already damaged but not completely broken, and the vibration frequency of the workpiece 200 indicates that the guide is about to fail.

[0053] Specifically, when the guide of the finishing mill group 1 fails, the inlet rolling guide cannot clamp the workpiece 200, causing the vibration frequency of the workpiece 200 to change rapidly. When the vibration frequency of the middle part of the workpiece 200 reaches 10-12 within the first time, it can be determined that the guide has failed.

[0054] Wear of the groove causes the vibration frequency of the workpiece 200 to change slowly, unlike a rapid change caused by a guide failure. Therefore, if the vibration frequency of the middle portion of the workpiece 200 reaches 10-12 within the second time, and the second time is less than the first time, the groove can be determined to be worn.

[0055] The beneficial effects of the anti-pile steel rolling production line 100 provided in this embodiment include:

[0056] 1. A scanner assembly is used to scan the vibration frequency of the rolled piece 200 in real time to determine whether the tension value of the rolled piece 200 is approaching a state that causes over-piling. When the vibration frequency or tension value exceeds the standard value, the speed of the conveyor motor of the finishing mill unit 1 is automatically adjusted and the operator is notified to prevent tension loss in the channel and the resulting steel pile-up accident.

[0057] 2. The vibration frequencies of the rolled piece 200 in two directions obtained by scanning with the first scanner 3 and the second scanner 4 are synthesized to obtain the vibration frequency of the rolled piece 200 in space, which can more accurately reflect the actual vibration frequency of the rolled piece 200.

[0058] Second embodiment

[0059] Please refer to Figure 3 This embodiment provides a method for preventing steel pile-up, which can be applied to the steel pile-prevention rolling production line 100 provided in the first embodiment. The method for preventing steel pile-up includes the following steps:

[0060] S1: Real-time detection of the vibration frequency of the workpiece 200 between the finishing mill group 1 and the reducing and sizing mill 2.

[0061] Since the rolling speed, wear of the rolling groove and guide failure have an impact on the vibration frequency between the finishing mill group 1 and the reducing and sizing mill 2, the vibration frequency of the rolled piece 200 between the finishing mill group 1 and the reducing and sizing mill 2 after the rolling is stabilized must be used as a benchmark.

[0062] Specifically, the first scanner 3 and the second scanner 4 may be arranged at a preset angle a to detect the vibration frequency of the scanning point on the rolled piece 200 in space.

[0063] S2: According to the vibration frequency, the speed of the conveying motor of the finishing mill group 1 is adjusted to reduce the tension value of the rolled piece 200 and prevent steel piling.

[0064] Specifically, the collected vibration frequency is processed by a processor's data processing algorithm to calculate the tension value of the rolled piece 200. Based on the tension value of the rolled piece 200, the processor controls the conveyor motor to increase or decrease its speed, thereby precisely controlling the tension value of the rolled piece 200 and achieving micro-tension rolling. For example, if the tension value is too high, the conveyor motor of the finishing mill 1 is controlled to decrease its speed; if the tension value is too low, the conveyor motor of the finishing mill 1 is controlled to increase its speed.

[0065] Of course, the processor can also directly determine whether the vibration frequency of the rolled piece 200 exceeds the normal reference range. When the vibration frequency exceeds the normal reference range, the speed of the finishing mill 1 is controlled to slow down, so as to reduce the vibration frequency of the rolled piece 200. When the vibration frequency does not reach the normal reference range, the speed of the finishing mill 1 is controlled to increase, so as to increase the vibration frequency of the rolled piece 200, thereby returning the vibration frequency of the rolled piece 200 to the normal reference range, thereby avoiding excessive tension of the rolled piece 200 and causing steel piling.

[0066] The beneficial effects of the anti-steel piling method provided in this embodiment include:

[0067] A first scanner 3 and a second scanner 4 are added between the finishing mill 1 and the reducing and sizing mill 2 to scan the vibration frequency of the rolled piece 200 in real time to determine whether the tension value is tending to be over-pile. The detected value is connected to the PLC, and the data is analyzed and judged, and can be displayed on the HMI screen in real time. When the standard value is exceeded, pre-speed adjustment is automatically performed and the operator is prompted to avoid the tension value in the channel getting out of control and causing steel piling accidents.

[0068] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An anti-pile steel rolling production line, characterized in that: The anti-steel pile production line comprises a processor, a finishing mill group (1), a scanner assembly and a reducing and sizing mill (2), wherein the scanner assembly is installed between the finishing mill group (1) and the reducing and sizing mill (2), the scanner assembly is used to scan the vibration frequency of the rolled piece (200) in real time, the processor is connected to the scanner assembly, and the processor is used to adjust the speed of the conveying motor of the finishing mill group (1) according to the vibration frequency to reduce the tension value of the rolled piece (200) and prevent steel pile; The scanner assembly comprises a first scanner (3) and a second scanner (4), wherein a preset angle a is formed between the first scanner (3) and the second scanner (4), wherein the preset angle a between the first scanner (3) and the second scanner (4) is 45° to 120°, and the vibration frequency of the rolled piece (200) is scanned simultaneously, and the processor is used to receive the vibration frequency of the rolled piece (200) obtained by scanning the first scanner (3) and the second scanner (4), and synthesize the vibration frequencies in two directions to obtain the vibration frequency of the rolled piece (200) in space; The processor is further configured to adjust the speed of the conveying motor of the finishing mill (1) according to the vibration frequency so that the vibration frequency is within a normal reference range, including controlling the finishing mill (1) to reduce speed when the vibration frequency exceeds the normal reference range, and controlling the finishing mill (1) to increase speed when the vibration frequency does not reach the normal reference range.

2. A method for preventing steel piling, characterized in that: The method for preventing steel piling adopts the anti-steel piling rolling production line according to claim 1, and the method for preventing steel piling comprises: S1: Real-time detection of the vibration frequency of the rolled piece (200) between the finishing mill (1) and the reducing and sizing mill (2); S2: According to the vibration frequency, the speed of the conveying motor of the finishing mill group (1) is adjusted to reduce the tension value of the rolled piece (200) and prevent steel piling.

3. The method for preventing steel piling according to claim 2, characterized in that: S1 includes: A first scanner (3) and a second scanner (4) are arranged at a preset angle a to respectively detect the vibration frequencies of the rolled piece (200) in two directions and synthesize the vibration frequencies in space.

4. The method for preventing steel piling according to claim 2, wherein S2 include: According to the vibration frequency, the speed of the conveying motor of the finishing mill group (1) is adjusted so that the vibration frequency is within a normal reference range.

5. The method for preventing steel piling according to claim 4, characterized in that: Before S1, the method for preventing steel piling also includes: A normal reference range of the vibration frequency of the rolled piece (200) between the finishing mill group (1) and the reducing and sizing mill (2) is collected.

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