CN113333478A - Steel piling fault detection method for wire and bar mill - Google Patents
Steel piling fault detection method for wire and bar mill Download PDFInfo
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- CN113333478A CN113333478A CN202110574623.XA CN202110574623A CN113333478A CN 113333478 A CN113333478 A CN 113333478A CN 202110574623 A CN202110574623 A CN 202110574623A CN 113333478 A CN113333478 A CN 113333478A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 85
- 239000002699 waste material Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 10
- 238000013024 troubleshooting Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/72—Rear end control; Front end control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a method for detecting a steel piling fault of a wire and bar mill, belongs to the technical field of wire and bar mills, solves the problem that a rolling mill set and a finishing mill set lack a fault detection function, and provides a method for detecting a steel piling fault of a wire and bar mill, which comprises a head waste product detection unit: the head waste detection unit is used for tracking the process that the head of a rolled piece passes through each rack, loop scanners are distributed in the front and the back of each rack, and the head waste detection unit also comprises a load sensor used for detecting a rolling mill load signal generated by a rolling mill transmission cabinet; the whole equipment is processed in a segmented mode, a single rack can be rapidly specified when a fault problem occurs, equipment fault troubleshooting time is optimized, the high-reliability waste product detection function of the wire and bar rolling mill is still in an original rolling mill control system, reliability of the waste product detection function is improved, manual misoperation is avoided, multiple detection modes are used for detecting the fault problem, and equipment safety is improved.
Description
Technical Field
The invention belongs to the technical field of wire and bar rolling mills, and particularly relates to a steel piling fault detection method of a wire and bar rolling mill.
Background
At present, the arrangement mode of bar mills on bar production lines in China generally adopts horizontal and vertical alternative arrangement to realize continuous high-speed rolling. In order to improve the operating efficiency, the clearance of a rolled piece in a rolling mill is less than 5 seconds, namely, during normal production, at least two blanks (rolled pieces) are arranged in the rolling mill, flying shears are arranged in front of a middle rolling mill group and a finishing rolling mill group, the flying shears have the functions of head cutting and tail cutting and also have the functions of accident and fault breaking, and when the latter rolling mill breaks down, the rolled piece in the former rolling mill is broken down to avoid fault expansion.
Disclosure of Invention
The invention aims to provide a method for detecting a steel piling fault of a wire and bar mill, which solves the problem that a rolling mill group and a finishing mill group lack a fault detection function.
The technical scheme adopted by the invention is as follows:
a steel piling fault detection method of a wire and rod mill comprises a head waste detection unit: the head waste detection unit is used for tracking the process of the head of the rolled piece passing through each rack;
the head waste detection unit comprises an N-1 rack, an N rack, an N +1 rack and a rolling mill controller PLC, wherein the number of the N racks is N more than or equal to 2;
loop scanners are distributed at the front and the back of each rack;
the loop scanner is used for generating a push-pull loop quantity analog quantity signal of a rolled piece between rolling mills;
the loop scanner is also provided with a loop scanner which generates a hot metal detection signal;
and each loop scanner is in signal connection with a rolling mill controller PLC.
Further, the device also comprises a load sensor, wherein the load sensor is used for detecting a rolling mill load signal generated by the rolling mill transmission cabinet, and the load sensor is in signal connection with a rolling mill controller PLC.
Furthermore, the load sensors of the N-1 stand control the on-off of the loop scanning of the N stand, each group of load sensors is in signal connection with a corresponding input port of a rolling mill controller PLC, and the rolling mill controller PLC is in signal connection with each loop scanner.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the head tracking of the N stand is started by a hot metal detector signal generated by a loop scanner installed in front of the N stand, a digital integrator of a rolling mill controller PLC continuously updates the length value of the waste products of the N stand through the digital integrator in the PLC at the inlet speed of the N stand after a rolling mill is started, namely the length of the rolled pieces passing through the N stand, the rolling mill controller PLC detects whether the rolled pieces exist in the stand or not through data transmitted by the loop scanner, and if the rolling mill breaks down, the rolling mill controller PLC controls the rolling pieces in the rolling mill in front to be broken and further limits the continuous inrush, so that the fault expansion is avoided.
2. Besides equipment faults caused by steel pile accumulation, the load sensor is used for detecting a rolling mill load signal generated by a rolling mill transmission cabinet, the original running linear speed of a rolled piece is changed due to the rolling deformation effect of a rolling mill on the rolled piece, the operation updating speed of the digital integrator is changed into the inlet speed of the N stand and changed into the outlet speed, and then the comparison with the waste length value output by the software digital integrator can be used for determining whether the head of the rolled piece leaves the N stand or not.
3. The head tracking of each rack of the whole unit is carried out in a relay mode in a cascade mode, and three racks are continuous and adjacent; when a single rack fails, a certain rack can be quickly specified, meanwhile, the equipment troubleshooting time is optimized, the high-reliability waste product detection function of the wire and bar rolling mill is still in the original rolling mill control system, the reliability of the waste product detection function is improved, and manual misoperation is avoided.
Drawings
FIG. 1 is a signal flow diagram of the product head reject tracking process of the present invention;
the labels in the figure are: an N-1 frame; 2 or 4. loop scanner; n frames; an N +1 frame; 6. a rolling mill controller PLC; 7. a load cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, a method for detecting a steel piling fault of a wire and bar rolling mill includes a head scrap detecting unit: the head waste detection unit is used for tracking the process of the head of the rolled piece passing through each rack;
the head waste detection unit comprises an N-1 rack (1), an N rack (3), an N +1 rack (5) and a rolling mill controller PLC (6), wherein the number of the N racks is N more than or equal to 2;
loop scanners (2, 4) are distributed at the front and the back of each rack;
the loop scanners (2 and 4) generate a push-pull loop quantity analog quantity signal of a rolled piece between rolling mills;
the loop scanners (2, 4) generate hot metal detection signals;
each loop scanner (2, 4) is in signal connection with a rolling mill controller PLC (6).
In the structure, the loop scanners (2 and 4) are key detection devices for realizing tension-free rolling of the wire and bar rolling mill, and can generate a loop quantity analog quantity signal representing the push-pull degree of a rolled piece between rolling mills and also can generate a Boolean quantity signal equivalent to the output of a hot metal detector; a hot metal detector N _ HMD signal generated by an N-HMD of a loop scanner (2, 4) arranged in front of an N stand starts the head part of the N stand to track the process, a rolling mill controller PLC (6) is provided with a digital integrator to continuously update the waste length value N-COB-L of the N stand, namely the length of a rolled piece passing through the N stand, through the digital integrator in the PLC at the inlet speed of the N stand after a rolling mill is started, the rolling mill controller PLC (6) detects whether the rolled piece exists in the stand or not through data transmitted by the loop scanner (2, 4), if the rolling mill has a fault, the rolling mill controller PLC (6) controls to break the rolled piece in the front rolling mill so as to limit continuous inflow between the rolled pieces, so that the fault expansion is avoided, and compared with the condition that all the rolled pieces in the rolling mill have to be broken completely to stop once the fault breaking of the rolling mill is started, or the man-made stopping, the technical scheme has stronger safety performance and higher actual reflecting efficacy; the hot metal detector signal before N stander, is produced by the hot metal detector of loop scanner (2, 4) N-HMD installed before N stander, COB _ START with the software digital integrator that is set up in the rolling mill controller PLC (6), the hot metal detector signal of loop scanner (2, 4) installed after N stander produces, connect with N _ COB _ DEF of the intelligent fuzzy recognition software module of the waste in the PLC controller, N _ COB _ DEF is 1 to explain that the rolled piece has already passed N stander.
Example 2:
the embodiment is developed based on embodiment 1, and in addition to the embodiment 1, the scheme also comprises a load sensor (7) for detecting the fault of the rolling mill, wherein the load sensor (7) is used for detecting a rolling mill load signal generated by a transmission cabinet of the rolling mill, and the load sensor (7) is in signal connection with a PLC (6) of the rolling mill controller. When a rolling mill load generated by a rolling mill transmission cabinet generates a rolling mill steel biting signal STDn-MIS signal which is 1 in the running process of a rolling mill, the original running linear speed of a rolled piece is changed due to the rolling deformation effect of the rolling mill on the rolled piece, the speed of the digital integrator for calculating and updating the N-COB-L is also changed into the inlet speed of an N rack and is changed into the outlet speed, the digital integrator continues to update the reject length value N-COB-L of the N rack at the outlet speed of the N rack, when the reject length value N-COB-L output by the software digital integrator in the PLC is larger than the preset length COB _ L _ SET and a reject detector (namely a hot metal detector signal before a rear rack) N _ COB _ DEF of the N rack is not received, the head of the rolled piece is considered not to pass through the N rack, reject appears in the N rack, the reject signal STDn-COB of the N rack is SET to be 1, the control system immediately starts the accident fault breaking function of the front scissors of the unit, when the software digital integrator in the PLC continuously updates the waste length value N-COB-L to be greater than the preset length COB _ L _ SET and receives the waste detector N-1_ HMD (generated by the HMD in front of the N-1 stand) of the N stand, the head of the rolled piece is considered to pass through the N stand, the waste tracking process of the N stand is finished,
example 3:
the embodiment is developed based on embodiment 1, wherein the load sensors (7) of the N-1 stand control the on and off of loop scanning of the N stand, each group of load sensors (7) is in signal connection with a corresponding input port of a rolling mill controller PLC (6), and the rolling mill controller PLC (6) is in signal connection with each loop scanner (2, 4); the head tracking of each frame of the whole unit is performed in a relay mode in a cascade mode, and only the N frames are changed into the N +1 frames, the N-1 frame, the N +1 frame and three continuous and adjacent frames; each rack has problems, so that a certain rack can be specified, meanwhile, the equipment fault troubleshooting time is optimized, the high-reliability waste product detection function of the wire and bar rolling mill is still in the original rolling mill control system, the high-reliability waste product detection function is automatically adapted to different rolling mill configuration selections, the reliability of the waste product detection function is improved, and manual misoperation is avoided.
For the automatic selection of the configuration of the rolling mill, the configuration of the finishing mill group with different rolling specifications can be divided into three modes of 6 frames for complete selection, the front 4 frames for selection and the rear four frames for selection, and when the three modes work, the set value of the length of the waste product of the head of the rolled piece passing through the rolling mill group in the three modes is automatically calculated, so that the configuration selection of the rolling mill which is not moved is adapted. The SET value COB _ L _ SET for the length of the waste is SET at a distance from N _ HMD to N +1 stands to ensure that the rolled piece passes through the rolling mill reliably. As in fig. 1, the distance of the rolling mill is 4.5 m, N _ HMD is installed in the middle of N stands of N-1 stands, and COB _ L _ SET is 7.0 m.
In conclusion, the whole equipment is processed in a segmented mode, a certain rack can be quickly specified when a single rack fails, equipment failure troubleshooting time is optimized, the high-reliability waste detection function of the wire and bar rolling mill is still in an original rolling mill control system, the reliability of the waste detection function is improved, manual misoperation is avoided, besides the equipment failure caused by steel piling, the load sensor is used for detecting a rolling mill load signal generated by a rolling mill transmission cabinet, the failure problem can be detected in multiple detection modes, and the safety of the equipment is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A steel piling fault detection method of a wire and rod mill is characterized by comprising a head waste detection unit: the head waste detection unit is used for tracking the process of the head of the rolled piece passing through each rack;
the head waste detection unit comprises an N-1 rack, an N rack, an N +1 rack and a rolling mill controller PLC, wherein the number of the N racks is N more than or equal to 2;
loop scanners are distributed at the front and the back of each rack;
the loop scanner generates a push-pull loop quantity analog quantity signal of a rolled piece between rolling mills;
the loop scanner generates a hot metal detection signal;
and each loop scanner is in signal connection with a rolling mill controller PLC.
2. The method of detecting a fault in the steel pile of a wire rod rolling mill as claimed in claim 1, further comprising a load sensor for detecting a rolling mill load signal generated by a rolling mill transmission cabinet, said load sensor being in signal connection with a rolling mill controller PLC.
3. The method of claim 2, wherein said load sensors of said N-1 stands control the opening and closing of loop scans of said N stands, each set of said load sensors being in signal connection with a corresponding input port provided by a mill controller PLC in signal connection with each loop scanner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110574623.XA CN113333478A (en) | 2021-05-25 | 2021-05-25 | Steel piling fault detection method for wire and bar mill |
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| CN202110574623.XA CN113333478A (en) | 2021-05-25 | 2021-05-25 | Steel piling fault detection method for wire and bar mill |
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