CN111672914B - Cooling bed rack control method - Google Patents
Cooling bed rack control method Download PDFInfo
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- CN111672914B CN111672914B CN202010624940.3A CN202010624940A CN111672914B CN 111672914 B CN111672914 B CN 111672914B CN 202010624940 A CN202010624940 A CN 202010624940A CN 111672914 B CN111672914 B CN 111672914B
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- 238000001816 cooling Methods 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 150
- 239000010959 steel Substances 0.000 claims abstract description 150
- 238000005096 rolling process Methods 0.000 claims abstract description 68
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 19
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 230000003116 impacting effect Effects 0.000 claims abstract description 7
- 230000003111 delayed effect Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 21
- 230000001934 delay Effects 0.000 claims description 4
- 230000032258 transport Effects 0.000 claims description 3
- 239000002436 steel type Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 4
- 230000033764 rhythmic process Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
- B21B43/003—Transfer to bed
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/12—End of product
- B21B2273/16—Tail or rear end
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a cooling bed rack control method, which comprises the following steps: a. acquiring the length L of the steel bar tailings when the steel bar tailings hit the rack; b. acquiring the position S of the steel bar tailing on a rolling line when the length of the steel bar tailing is L; c. collecting a shearing signal and a steel biting signal at the position S, and sending the signals to a cooling bed PLC; d. the cooling bed PLC judges the size between the length L and the length L of the actual steel bar tailing, if the length L of the actual steel bar tailing is smaller than the length L, a signal X is generated, and the delay time TL is input; e. when the signal X is generated, the TL time is delayed to control the cooling bed rack to stop until the reinforcing steel bar tailing reaches the cooling bed rack, and the cooling bed rack is allowed to continue to act, so that the reinforcing steel bar tailing is prevented from impacting the cooling bed rack. The steel bar tailing in the invention can not collide with a cooling bed rack, and the invention has the characteristics of reducing product loss, increasing income, reducing the incidence rate of safety accidents and lightening the labor intensity of workers.
Description
Technical Field
The invention relates to a control method of a steel bar cooling bed, in particular to a control method of a cooling bed rack of steel bar tailings.
Background
The action of the cold bed rack of the long material factory is controlled by the steel throwing action of the apron board, the cold bed rack acts once when the apron board throws steel once, when the varieties of the steel bars with the diameters of 10mm, 12mm and 14mm are produced, the length of the steel bar tailing is not within the specified size, and the length of the steel bar tailing cannot be controlled, when the length of the steel bar tailing is smaller than a certain size, the speed of the steel bar tailing can reach more than 17m/s, steel bar tailing steel throwing cannot be identified when the conventional cooling bed rack acts, the previous steel throwing signal shielding of the steel bar tailing cannot be carried out, the steel bar tailing with too high speed can often hit the running cooling bed rack, basically 1 steel bar can hit the rack by 5 steel bars, waste products of 3-4 fixed-length steel bars can be caused when the rack is hit every time, and the material loss is large, the energy is wasted, the yield of products is reduced, and the production cost is increased; the steel bar tailings can fly around, so that the steel bar tailings and the cooling bed rack can be damaged, safety accidents can be caused, and the personal safety and equipment safety of operators can be damaged; in addition, the whole production rhythm is also disturbed, the machine is required to be stopped for finishing, the processing time is not less than 5 minutes (sometimes, the production is carried out while the processing is carried out), the labor intensity of workers is increased, the production efficiency of products is reduced, the production capacity is reduced, and the income is reduced.
Therefore, in the existing cooling bed steel bar feeding mode, the tail material of the steel bar can often hit the running cooling bed rack, and the problems of large material loss, increased production cost, certain potential safety hazard and high labor intensity exist.
Disclosure of Invention
The invention aims to provide a cooling bed rack control method. The steel bar tailing in the invention can not collide with a cooling bed rack, and the invention has the characteristics of reducing product loss, increasing income, reducing the incidence rate of safety accidents and lightening the labor intensity of workers.
The technical scheme of the invention is as follows: the cooling bed rack control method comprises the following steps:
a. acquiring the length L of the steel bar tailings when the steel bar tailings hit the rack;
b. acquiring the position S of the steel bar tailing on a rolling line when the length of the steel bar tailing is L;
c. collecting a shearing signal and a steel biting signal at the position S, and sending the signals to a cooling bed PLC;
d. the cooling bed PLC judges the size between the length L and the length L of the actual steel bar tailing, if the length L of the actual steel bar tailing is smaller than the length L, a signal X is generated, and the delay time TL is input (only once input is needed);
e. when the signal X is generated, TL time is delayed to control the cooling bed rack to stop until the reinforcing steel bar tailing reaches the cooling bed rack, the cooling bed rack is allowed to continue to act, the purpose of controlling the reinforcing steel bar cooling bed rack to move backwards is achieved, and the reinforcing steel bar tailing is prevented from impacting the cooling bed rack.
In the cooling bed rack control method, in the step b, the specific step of acquiring the position S includes:
(1) calculating the running time T of the steel bar tailings on a rolling line according to the length L of the steel bar tailings, wherein T is (L-D)/V, V is the linear speed of a rolling mill, and D is the distance between the last hot detection and the double-length shear;
(2) detecting the time t1, t2, t3, … and ti required by the steel bars on the rolling line from the moment of separating from each rolling mill to the moment of separating from the last hot detection rack through a main PLC;
(3) and finding the position of the rolling mill with ti being T, wherein the position of the rolling mill is S.
In the cooling bed rack control method, the step c is specifically that the multi-length shear PLC collects a shear signal and sends the collected shear signal to the cooling bed PLC, and the master PLC collects a steel biting signal at the position S and sends the steel biting signal to the cooling bed PLC.
In the cooling bed rack control method, in the step d, the step of judging the size between the length L and the length L of the actual steel bar tailing by the cooling bed PLC includes:
the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shears PLC, if the rolling mill steel biting signal at the main PLC acquisition position S received by the cooling bed PLC is '1', the steel bar is normally sheared at the rolling mill, or the actual steel bar tailing length L is not less than L;
and the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shear PLC, and if the cooling bed PLC receives a rolling mill steel biting signal of a main PLC acquisition position S, the rolling mill steel biting signal is '0', which indicates that the steel bar is not positioned at the rolling mill, the actual length L of the tail material of the steel bar is less than L.
In the cooling bed rack control method, in the step d, the delay time TL is a time when the steel bars do not collide with each other on the cooling bed, and the steel types and specifications are different and the delay time TL is different.
In the method for controlling the cooling bed rack, the step e is specifically that when a signal X that the length L of the actual steel bar tailing is smaller than L is generated, the cooling bed rack transports the last but one steel bar, the cooling bed PLC delays TL time to control the cooling bed rack to stop, and when the apron board thermal detection detects that the steel bar tailing reaches the cooling bed rack, the cooling bed PLC controls the cooling bed rack to continue to act, so that the purpose of controlling the last but one steel bar cooling bed rack to be immobile is achieved, and the steel bar tailing is prevented from impacting the cooling bed rack.
The system adopted by the cooling bed rack control method comprises a rolling line system and a cooling bed system, wherein the rolling line system comprises a plurality of rolling mills, an end frame thermal detection unit and a main PLC (programmable logic controller), the cooling bed system comprises a skirt board, a skirt board thermal detection unit and a cooling bed, the cooling bed system further comprises a multi-length shear positioned between the rolling line system and the cooling bed system and a multi-length shear PLC (programmable logic controller) for controlling the multi-length shear, the main PLC, the multi-length shear PLC and the skirt board thermal detection unit are electrically connected with the cooling bed PLC, and the cooling bed PLC is respectively connected with an industrial personal computer and a motor of a cooling bed rack.
Compared with the prior art, the length and steel throwing of the steel bar tailing can be identified when the cooling bed rack acts, when the steel bar tailing is smaller than L, a steel throwing signal of the previous time is shielded, the cooling bed rack stops running before the steel bar tailing is loaded on the cooling bed rack, and the cooling bed rack acts again when the steel bar tailing is thrown, so that the steel bar tailing is prevented from colliding with the rack, the messy flying phenomenon of the steel bar tailing and the loss of materials and energy are avoided, the yield of a product is improved, safety accidents are greatly reduced, the renovation processing time is reduced, and the production rhythm and the production efficiency of the steel bar are improved;
after the cold bed rack collision project is improved, the phenomenon of rack collision disorder of the cold bed is solved, 12mm of round steel bar waste can be reduced by 0.888, 3, 9, 270/5/1000 and 1.294 tons per shift (0.888 is the weight of 12mm round steel bars per meter, 3 is the number of waste, 9 is the length of each fixed-size steel bar, 270/5 is the number of times of tooth collision per shift), the time is saved by 0.5 hour per day, the labor intensity of workers is reduced, 12, 1.55 and 18.6 tons of steel can be produced in the saved time, the waste is reduced by 300 days per year, 300, 1.294 and 388.2 tons of waste is reduced, the difference price of finished products and waste is 1000 yuan/ton per year according to 300 shifts per year, and 388200 yuan can be created;
the time can be saved by 150 hours each year, 5580 tons of steel can be produced each year, the profit of each ton of steel can be 100 yuan/ton, the benefit can be created by 558000 yuan, and the benefit of reducing waste products can be created by 946200 yuan in total, so that the benefit is greatly increased.
Therefore, the steel bar tailing cannot collide with the cooling bed rack, and the steel bar tailing has the characteristics of reducing product loss, increasing income, reducing the occurrence rate of safety accidents and reducing the labor intensity of workers.
Drawings
Fig. 1 is a schematic view of a steel reinforcement polishing structure of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1.
As shown in fig. 1, the cooling bed rack control method includes the following steps:
a. acquiring the length L of the steel bar tailings when the steel bar tailings hit the rack; the length L of the steel bar tailing is obtained according to the rack impact condition in the previous steel bar throwing process.
b. Acquiring the position S of the steel bar tailing on a rolling line when the length of the steel bar tailing is L; the method comprises the following specific steps:
(1) calculating the running time T of the steel bar tailings on a rolling line according to the length L of the steel bar tailings, wherein T is (L-D)/V, V is the linear speed of a rolling mill, and D is the distance between the tail frame and the double-length shear during the thermal detection;
(2) detecting the time t1, t2, t3, … and ti required by the steel bars on the rolling line from the moment of separating from each rolling mill to the moment of separating from the last hot detection rack through a main PLC; namely, the time required by the steel bar to be separated from the K1 rolling mill to be separated from the last hot testing is t1, the time required by the steel bar to be separated from the K2 rolling mill to be separated from the last hot testing is t2, and the like.
(3) And finding the position of the rolling mill with ti being T, wherein the position of the rolling mill is S.
c. The multi-length shear PLC collects shear signals and sends the collected shear signals to the cooling bed PLC, and the main PLC collects steel biting signals at the position S and sends the steel biting signals to the cooling bed PLC.
d. The cooling bed PLC judges the size between the actual length L and the actual length L of the tail material of the reinforcing steel bar;
the judging step comprises:
the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shears PLC, if the rolling mill steel biting signal at the main PLC acquisition position S received by the cooling bed PLC is '1', the steel bar is normally sheared at the rolling mill, or the actual steel bar tailing length L is not less than L;
and the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shear PLC, and if the rolling mill steel biting signal of the main PLC acquisition position S received by the cooling bed PLC is '0', the steel bar is not positioned at the rolling mill, and the actual steel bar tailing length L is less than L.
If the length L of the actual steel bar tailing is smaller than L, the cooling bed PLC generates a signal X that the length L of the actual steel bar tailing is smaller than L, and delay time TL is input to the cooling bed PLC according to the specification of the steel bar; the delay time TL is generated by debugging for many times, is the time when the reinforcing steel bars cannot collide the racks on the cooling bed, and has different reinforcing steel bar specifications and different delay times.
e. When the length L of the actual steel bar tailing is smaller than the length L of the signal X, the cooling bed rack transports the last but one steel bar, the cooling bed PLC delays TL time to control the cooling bed rack to stop, and when the apron board thermal detection detects that the steel bar tailing reaches the cooling bed rack, the cooling bed PLC controls the cooling bed rack to continue to act, so that the purpose of controlling the last but one steel bar cooling bed rack to be motionless is achieved, and the steel bar tailing is prevented from impacting the cooling bed rack.
The system adopted by the cooling bed rack control method comprises a rolling line system and a cooling bed system, wherein the rolling line system comprises a plurality of rolling mills, an end frame thermal detection unit and a main PLC (programmable logic controller), the cooling bed system comprises a skirt board, a skirt board thermal detection unit and a cooling bed, the cooling bed system further comprises a multi-length shear positioned between the rolling line system and the cooling bed system and a multi-length shear PLC (programmable logic controller) for controlling the multi-length shear, the main PLC, the multi-length shear PLC and the skirt board thermal detection unit are electrically connected with the cooling bed PLC, and the cooling bed PLC is respectively connected with an industrial personal computer and a motor of a cooling bed rack.
Example 2.
As shown in fig. 1, the cooling bed rack control method includes the following steps:
a. according to the rack impact condition in the previous steel bar throwing process, the length L of the steel bar tailings is obtained to be 50m when the steel bar tailings impact the rack;
b. acquiring the position S of the steel bar tailing on a rolling line when the length of the steel bar tailing is 50 m; the method comprises the following specific steps:
(1) calculating the running time T of the steel bar tailings on a rolling line according to the length 50m of the steel bar tailings, wherein T is (L-D)/V is (50-24)/14 is approximately equal to 1.86 s; wherein V is 14m/s, which is the linear speed of the rolling mill; d is 24m, which is the distance between the last frame and the double-length shear;
(2) detecting the time t1, t2, t3, … and ti required by the steel bars on the rolling line from the moment of separating from each rolling mill to the moment of separating from the last hot detection rack through a main PLC; namely, the time required by the steel bar to be separated from the K1 rolling mill to be separated from the last hot test is t1, the time required by the steel bar to be separated from the K2 rolling mill to be separated from the last hot test is t2, and the like.
(3) And if the time T5 is 1.86S-T from the moment the reinforcing steel bar is found to be separated from the K5 rolling mill to the moment the reinforcing steel bar is separated from the last hot inspection stand, the position of the K5 rolling mill is S.
c. The multi-length shear PLC acquires a shear signal and sends the acquired shear signal to the cooling bed PLC, and the main PLC acquires a steel biting signal at a position S and sends the steel biting signal to the cooling bed PLC;
d. the cooling bed PLC judges the size between the actual length L and the actual length L of the tail material of the reinforcing steel bar;
the judging step comprises:
the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shear PLC, if the cooling bed PLC receives a rolling mill steel biting signal of K5 rolling mill acquired by the main PLC, the steel is normally sheared, or the actual length l of the tail material of the steel bar is not less than 50 m;
and the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shear PLC, and if the cooling bed PLC receives a rolling mill steel biting signal acquired by the main PLC at the K5 rolling mill, the rolling mill steel biting signal is '0', which indicates that the steel bar is not at the rolling mill, the actual steel bar tailing length l is less than 50 m.
And if the length l of the actual steel bar tailing is less than 50m, the cooling bed PLC generates a signal X, and if the diameter of the produced steel bar steel is 12mm, the range of the T is 4-6s through detection, and the delay time T is input into the cooling bed PLC for 4 s. If T is less than 4s, the cooling bed rack does not act when the apron board is placed under the last but one steel bar, and 3 steel bars are placed in one groove; if T is more than 6s, when the penultimate steel bar is put into the apron board, the cooling bed rack can act, and tailings can collide with the cooling bed rack.
e. When the length L of the actual steel bar tailing is smaller than the length L of the signal X, the cooling bed rack conveys the last but one steel bar, the cooling bed PLC delays the time for 4s to control the cooling bed rack to stop, and when the apron board thermal detection detects that the steel bar tailing reaches the cooling bed rack, the cooling bed PLC controls the cooling bed rack to continue to act, so that the purpose of controlling the last but one steel bar cooling bed rack to be motionless is achieved, and the steel bar tailing is prevented from impacting the cooling bed rack.
The system adopted by the cooling bed rack control method comprises a rolling line system and a cooling bed system, wherein the rolling line system comprises a plurality of rolling mills, an end frame thermal detection unit and a main PLC (programmable logic controller), the cooling bed system comprises a skirt plate, the skirt plate thermal detection unit and a cooling bed, the cooling bed system further comprises a multiple-length shear positioned between the rolling line system and the cooling bed system and a multiple-length shear PLC (programmable logic controller) for controlling the multiple-length shear, the main PLC, the multiple-length shear PLC and the skirt plate thermal detection unit are electrically connected with the cooling bed PLC, and the cooling bed PLC is respectively connected with an industrial personal computer and a motor of a cooling bed rack.
Claims (5)
1. The cooling bed rack control method is characterized in that: the method comprises the following steps:
a. acquiring the length L of the steel bar tailings when the steel bar tailings hit the rack;
b. when the length of the steel bar tailing is L, the position S of the steel bar tailing on a rolling line is obtained, and the specific method comprises the following steps:
(1) calculating the running time T of the steel bar tailings on a rolling line according to the length L of the steel bar tailings, wherein T is (L-D)/V, V is the linear speed of a rolling mill, and D is the distance between the last hot detection and the double-length shear;
(2) detecting the time t1, t2, t3, … and ti required by the steel bars on the rolling line from the moment of separating from each rolling mill to the moment of separating from the last hot detection rack through a main PLC;
(3) finding the position of the rolling mill where ti is equal to T, wherein the position of the rolling mill is S;
c. the multi-length shear PLC acquires a shear signal and sends the acquired shear signal to the cooling bed PLC, and the main PLC acquires a steel biting signal at a position S and sends the steel biting signal to the cooling bed PLC;
d. the cooling bed PLC judges the size between the length L and the length L of the actual steel bar tailing, if the length L of the actual steel bar tailing is smaller than the length L, a signal X is generated, and the delay time TL is input;
e. when the signal X is generated, TL time is delayed to control the cooling bed rack to stop until the reinforcing steel bar tailing reaches the cooling bed rack, the cooling bed rack is allowed to continue to act, the purpose of controlling the penultimate reinforcing steel bar cooling bed rack to be immobile is achieved, and the reinforcing steel bar tailing is prevented from impacting the cooling bed rack.
2. The cooling bed rack control method according to claim 1, characterized in that: in the step d, the step of judging the size between the length L and the length L of the actual steel bar tailing by the cooling bed PLC comprises the following steps:
the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shears PLC, if the rolling mill steel biting signal at the main PLC acquisition position S received by the cooling bed PLC is '1', the steel bar is normally sheared at the rolling mill, or the actual steel bar tailing length L is not less than L;
and the cooling bed PLC receives a shearing signal of the multi-length shears acquired by the multi-length shear PLC, and if the rolling mill steel biting signal of the main PLC acquisition position S received by the cooling bed PLC is '0', the steel bar is not positioned at the rolling mill, and the actual steel bar tailing length L is less than L.
3. The cooling bed rack control method according to claim 1, characterized in that: in the step d, the delay time TL is the time that the steel bars cannot collide on the cooling bed, the steel types are different in specification, and the delay time TL is different.
4. The cooling bed rack control method according to claim 1, characterized in that: and e, when a signal X that the length L of the actual reinforcing steel bar tailing is smaller than L is generated, the cooling bed rack transports the last but one reinforcing steel bar, the cooling bed PLC delays TL time to control the cooling bed rack to stop, and when the apron board thermal detection detects that the reinforcing steel bar tailing reaches the cooling bed rack, the cooling bed PLC controls the cooling bed rack to continue to act, so that the purpose of controlling the last but one reinforcing steel bar cooling bed rack to be motionless is achieved, and the reinforcing steel bar tailing is prevented from impacting the cooling bed rack.
5. The system adopted by the cooling bed rack control method according to any one of claims 1 to 4, characterized in that: including rolling line system and cold bed system, rolling line system includes that a plurality of rolling mills, end frame heat are examined and main PLC, and the cold bed system includes that skirtboard, skirtboard heat are examined and the cold bed, still cuts PLC with the multiple length that the control multiple length was cut including the multiple length that is located between rolling line system and the cold bed system, and main PLC, multiple length are cut PLC and skirtboard heat and are examined all to be connected with the cold bed PLC electricity, and the cold bed PLC is connected with the motor of industrial computer and cold bed rack respectively.
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| CN205551089U (en) * | 2016-04-25 | 2016-09-07 | 宣化钢铁集团有限责任公司 | A pinion rack device for production of small -size material |
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Denomination of invention: Cold bed rack control method Effective date of registration: 20231114 Granted publication date: 20220624 Pledgee: South Taihu New Area sub branch of Huzhou Bank Co.,Ltd. Pledgor: Zhejiang Fugang Group Co.,Ltd. Registration number: Y2023980065568 |
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