CN102989781A - Automatic control technology for head positioning of laying head of high-speed wire mill - Google Patents
Automatic control technology for head positioning of laying head of high-speed wire mill Download PDFInfo
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- CN102989781A CN102989781A CN2012101919461A CN201210191946A CN102989781A CN 102989781 A CN102989781 A CN 102989781A CN 2012101919461 A CN2012101919461 A CN 2012101919461A CN 201210191946 A CN201210191946 A CN 201210191946A CN 102989781 A CN102989781 A CN 102989781A
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Abstract
The invention discloses an automatic control technology for head positioning of a laying head of a high-speed wire mill, which belongs to the technical field of automatic control. In the automatic control technology, a PLC (Programmable Logical Controller), an HMI (Human Machine Interface) operation panel, a T400 template, a high-speed counting module (HSC), a thermal metal detector, a proximity switch and a process monitoring system are adopted. A mature electronic automatic control technology is introduced for automatically controlling head positioning of the laying head of the high-speed wire mill; programs are generated automatically by using the S7-CFC language of SIEMENS, i.e., a continuous function chart; and a powerful prefabricated program library and a standard block of the software, PLC elements ( such as input/output, a timer, a counter, a symbol table and the like) and the characteristics of graphical programming languages are utilized. According to the automatic control technology, delayed shearing and coarse positioning of a flying shear in front of a finishing mill are combined with accelerated positioning of the laying head, so that the defects of high inertia, poor rapidness and large positioning deviations existing in a home-made laying head are overcome, and a process control and system engineering technology for automatic head positioning of the laying head of the high-speed wire mill is developed.
Description
One, affiliated technical field:
Belong to the automatic control technology field, relate to the automated control technology of high-speed rod-rolling mill Laying head head location.
Two, background technology:
One of major product of our factory is high-speed rod, according to the actual production statistics with to the production operation personal investigation, in production process in the past, Laying head 3 to the 5 spiral materials that whenever spue, plant with regard to the head that 1 spiral material is arranged between the roll gap of stelmor roller-way, when serious disorderly volume, can produce accumulation at roller-way, make next root wire rod (2 tons/root steel) can't enter Laying head, for this reason, it is cataclasm to carry out immediately the flying shear shearing, and per tour stelmor roller-way and first group of air-cooled roller-way place behind Laying head, arrange the special messenger to cut useless and arrangement to the wire rod head, every volume is cut useless 1 to 4 circle.So, not only strengthen direct labor's labour intensity, reduced labor productivity, and had a strong impact on the qualification rate of product, increased percent defective.
Spinneret in the high-speed rod-rolling mill Laying head is comprised of a kind of spiral-shaped structure and solenoid.During Laying head work, solenoid is made High Rotation Speed, and when rolled piece out entered Laying head from finishing mill, the spinneret of Laying head was made High Rotation Speed, and rolled piece becomes circular wire rod and falls on the stelmor roller-way through behind the Laying head.
Because the stelmor roller-way of high-speed rod is to be installed side by side by many circular rollers to form, certain interval is arranged between the roller, when finished product wire rod process Laying head, the wire rod head is often planted between the roll gap of stelmor roller-way, cause the 1st section roller-way card line, make driving motor overload tripping operation, cause simultaneously finished wire rod on the stelmor roller-way, disorderly to roll up, cause producing a large amount of waste products of cutting.
Three. summary of the invention:
The automated control technology that the objective of the invention is open high-speed rod-rolling mill Laying head head location to reduce percent defective, increases product percent of pass, reduces labor strength, raises labour productivity.
The technical scheme that the present invention will solve above technical problem is: utilize ripe electronic auto-control technology, Laying head head location to high-speed rod-rolling mill is controlled automatically, the S7-CFC(Continuous Function Chart of Introduced from Siemens) language is continuous function figure, come automatically generating program with this, utilize this software powerful ready-made program storehouse and calibrated bolck, with and the PLC element that has (for example: I/O, timer, counter, symbol table etc.) and the characteristic of graphical programming language, automatically process control and the system engineering technology of location of exploitation high-speed rod-rolling mill Laying head head.
Technical scheme of the present invention is achieved in that the external product of this system hardware for introducing, and is comprised of a PLC, HMI guidance panel, T400 template, high speed counting module HSC, hot metal detector and an approach switch and process monitoring system.Only need to access hot metal detector from the scene, the approach switch signal, the high speed counting module HSC that Laying head code-disc signal flying shear control system before T400 template and the finishing mill increases newly, make the flying shear time-delay shear the next coarse adjustment to the angle of weaving silk of control, produce the additional speed preset signal of Laying head by programme-control, on the present speed that is added to is given, speed-raising by a period of time, the wire rod head position that Laying head is spued reaches the set angle position, play the effect of fine setting, the such automatic control mode of the two combination, make the head location of Laying head more accurately reliable, namely finish the head location function.
Core technology all adopts software, realizes from three parts:
When hot metal detector before the Laying head detects the head arrival of steel, must finish three calculating: at first, read the current residing position of Laying head by code-disc; Secondly, when the hot metal detector H1 before first workpiece front end arrival flying shear, PLC sampling was weaved silk the angle value of the mouth of pipe at that time whether in ± 60 degree scopes, and calculate the delay time value that flying shear is proofreaied and correct according to the rotary speed of this angle value and new angle process set value and the mouth of pipe of weaving silk, this value and the addition of flying shear shear time have just been obtained the starting time of flying shear.The 3rd, when the workpiece front end after flying shear before the finishing mill is sheared arrives hot metal detector H4, program calculates the angle value of the mouth of pipe in ± 60 degree scopes of weaving silk when weaving silk automatically according to rolling line egress line speed, by comparing with the technique initialization positional value, calculate the speed amount that Laying head need to change, then come regulating electric machine rotating speed by the speed preset value that changes the Laying head transmission device, further revise the angular error that still exists after the front flying shear time-delay of finishing mill is sheared.Automatic calculating and control Laying head speed make it reach position deviation and get final product.As shown in Figure 4.
Laying head automatic operation program is seen block diagram (shown in Figure 3).
Be transformed into Laying head location automatically after the control, workpiece front end is pressed given position (angle) from Laying head pipe situation out:
Finished product rate has improved 0.20%, and comprehensive qualified rate has improved 0.20%, comprehensive in useless rate descended 0.12%.
The realization of Laying head head Automatic Positioning Control technology produces a desired effect, and effect is remarkable in the application of Φ 10mm and above high line products.
The coil of wire that Laying head spues is fitly fallen on the stelmor roller-way, and production is carried out smoothly, can increase about 481.5 ten thousand yuan of economic benefit every year.
Four. description of drawings:
Fig. 1 is the rotational trajectory figure of the Laying head mouth of pipe.
Fig. 2 is HMI guidance panel realistic picture.
Fig. 3 is Laying head automatic operation flow chart.
Fig. 4 is the process control process schematic diagram.
H-hot metal detector, 2-flying shear, 3-finishing mill, 4-water tank, 5-Laying head, 6-motor, 7-incremental code-disc, 8-approach switch, 9-T400 module, 10-frequency conversion speed-adjusting system, HSC-high speed counting module, PLC-single board computer among the figure.
Five. the specific embodiment:
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail.
Embodiment 1
1. the hardware configuration of Laying head 5 head positioning control technology:
The computer control system of high-speed rod-rolling mill adopts the PLC single board computer of AM General GE company automatically to control, driving control system adopts the 6SE70 frequency conversion speed-adjusting system 10 of Siemens Company, when design improvement Laying head 5 heads are located automatically, be installed in addition with the T400 module 9 of a Siemens Company, increased " Laying head head location " control adjusting operation picture (shown in Figure 2) at control interface.
1.1. motion control unit:
1.2. incremental code-disc 7:
Incremental code-disc 7 is installed in afterbody and the rotation of motor 6 rotor synchronous of Laying head 5 drive motors 6.When 7 rotation of incremental code-disc, export square-wave pulses by three passages: the A of incremental code-disc 7, B two passages are exported 1024 square-wave pulses when motor 6 rotates a circle, mutual deviation is 90 ° on phase place; C-channel revolves at motor 6 only exports a square-wave pulse when turning around, be called all pulses.The angle number corresponding according to each pulse calculates the anglec of rotation of Laying head 5 spinnerets and workpiece front end in the residing position of locating area.
1.3. hot metal detector H:
Hot metal detector H is mainly for detection of the position of high temperature rolled piece.When the high temperature rolled piece is detected by hot metal detector H, the output high level signal, during without rolled piece, the output low level signal.
1.4. high speed counting module HSC:
Former electric-control system at finishing mill 3 front flying shears 2 increases a high speed counting mould HSC, is used for receiving Laying head motor code-disc 7 signals and Laying head zero-bit approach switch 8 signals, makes shearing system know at any time the anglec of rotation of the mouth of pipe of weaving silk.
2. the control mode of Laying head head location after improving:
Laying head 5 head positioning controls mainly are that workpiece front end can go out spinneret at given position when guaranteeing that rolled piece passes through Laying head 5.High-speed wire production line as shown in Figure 4, when the hot metal detector H1 before first workpiece front end arrival flying shear 2, weaved silk the at that time angle value of the mouth of pipe of PLC sampling, and calculate the delay time value that flying shear 2 is proofreaied and correct according to the rotary speed of this angle value and new angle process set value and the mouth of pipe of weaving silk, this value and flying shear 2 shear time additions have just been obtained the starting time of flying shear 2.When the head of rolled piece arrives hot metal detector H4 after shearing, program calculates the angle value of the mouth of pipe of weaving silk when weaving silk automatically according to rolling line egress line speed, by comparing with the technique initialization positional value, calculating Laying head 5 needs the speed amount of change, then come regulating electric machine rotating speed by the speed preset value that changes Laying head 5 transmission devices, further revise the angular error that still exists after flying shear 2 time-delays are sheared.In whole control procedure, flying shear 2 time-delay shearing controls are the coarse adjustment to the angle of weaving silk, and change the angle that Laying head 5 rotating speeds are further adjusted the mouth of pipe of weaving silk, and play the effect of fine setting, and it is more accurate reliable that the mode of the two combination makes the head location of Laying head 5 like this.Specification requirement to Laying head 5 head locations is: workpiece front end outgoing position (angle)=given position (angle) ± 60 °.
2.1. change the 5 chain-drive section positioning control of weaving silk that the rotating speed of Laying head 5 is proofreaied and correct:
The weave silk rotational trajectory of the mouth of pipe and the computational methods of angle:
When Laying head 5 is made High Rotation Speed, the rotational trajectory of Laying head 5 mouths of pipe as shown in Figure 1, as shown in Figure 1, the rotational trajectory of spinneret is clockwise, i.e. positive direction, its actual anglec of rotation α is: α=β PTOT-2k π face (k=1,2 ..., n)
β is angle (referring to 360 °/1024 here) corresponding to each pulse in the formula;
PTOT is tally count pulse sum.
Computer draws the α angle when calculating excursion is 0 °～360 °.
The head positioning control principle that changes the correction of Laying head 5 rotating speeds is the purpose of weaving silk the mouth of pipe and reaching control Laying head 5 head locations by increasing the starting time of Laying head 5, workpiece front end being delayed to reach.
The concrete grammar of control is: when workpiece front end went out to weave silk the mouth of pipe, computer was sampled to the outgoing position angle value of reality, by comparing with the given position value, calculated the position set point that makes new advances.When single line material head arrives hot metal detector H4 behind the finishing mill 3 instantly, computer is sampled to the angle value of the mouth of pipe of weaving silk this moment, be used for Laying head 5 rotating speeds are finely tuned, by receiving Laying head motor code-disc 7 signals and Laying head 5 zero-bit approach switchs 8 signals, make transmission system know at any time the anglec of rotation of the mouth of pipe of weaving silk; Then the rotary speed according to this angle value and new set positions point value and the mouth of pipe of weaving silk calculates the time value that Laying head 5 is proofreaied and correct, and this value and 5 given additions start-up time of setting Laying head has just been obtained the starting time of Laying head 5.
3. the software of Laying head 5 head locations configuration:
3.1. according to above principle and Mathematical Modeling, designed program with the CFC programming language of Siemens PLC C.
3.2. in Industry Control policer operation picture, designed the HMI guidance panel, as shown in Figure 2.
Claims (4)
1. the automatic control technology of a high-speed rod-rolling mill Laying head head location, by a PLC, a HMI guidance panel, the T400 template, high-speed counter module HSC, hot metal detector and approach switch and process monitoring system form, it is characterized in that utilizing the S7-CFC language of Siemens is continuous function figure, come automatically generating program, utilize this software powerful ready-made program storehouse and calibrated bolck, with and the PLC element that has such as I/O, timer, counter, the characteristic of symbol table and graphical programming language, exploitation high-speed rod-rolling mill Laying head head is process control and the system engineering technology of location automatically.
2. the automatic control technology of high-speed rod-rolling mill Laying head head location according to claim 1, it is characterized in that: the former electric-control system of flying shear is increased a high speed counting mould HSC, be used for receiving Laying head motor code-disc signal and Laying head zero-bit approach switch signal, make shearing system know at any time the anglec of rotation of the mouth of pipe of weaving silk, when rolled piece arrives hot metal detector H1, according to flying shear speed, calculate the time that needs time-delay to shear, thereby finish the coarse adjustment part of head location.
3. the automatic control technology of high-speed rod-rolling mill Laying head head location according to claim 1, it is characterized in that: Laying head Electrified Transmission original system is Siemens 6SE70 frequency converter, now increase by one of T400 technology controlling and process plate, be used for the Laying head rotating speed is finely tuned, by receiving Laying head motor code-disc signal and Laying head zero-bit approach switch signal, make transmission system know at any time the anglec of rotation of spinning plate; When hot metal detector H4 has detected the steel signal behind the finishing mill, Laying head rotational speed setup signal is superposeed, thereby finish the fine setting of location, Laying head control angle position, the fine setting program is worked out with the CFC programming language.
4. according to claim 1 or the automatic control technology of 4 described high-speed rod-rolling mill Laying head head locations, it is characterized in that: judge that according to the Laying head position that calculates they are whether in ± 60 degree scopes, if in this scope, then need not to adjust, if do not exist, calculating location deviation then, the position of calculating is subtracted each other with negative 60 degree positions, calculate position deviation, thereby calculate hot steel from the hot metal detector position to the time required the Laying head, automatically calculate and control Laying head speed and make it reach position deviation.
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Cited By (4)
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| CN109613481A (en) * | 2019-01-10 | 2019-04-12 | 重庆大学 | A kind of Wave beam forming identification of sound source method adapting to wind tunnel test environment |
| CN111922101A (en) * | 2020-08-20 | 2020-11-13 | 中天钢铁集团有限公司 | High-speed wire packet type arranging equipment and control method thereof |
| CN112068491A (en) * | 2020-09-02 | 2020-12-11 | 四川省达州钢铁集团有限责任公司 | Method for improving response speed of flying shear |
| CN113714302A (en) * | 2021-08-06 | 2021-11-30 | 阳春新钢铁有限责任公司 | Hook type recoil control method for changing tail ring of dual-high-speed wire rolling |
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| CN101332475A (en) * | 2008-07-23 | 2008-12-31 | 福建三钢闽光股份有限公司 | Automatic control method of head orientation of laying head |
| CN102441569A (en) * | 2011-12-09 | 2012-05-09 | 中冶南方（武汉）自动化有限公司 | New method for controlling flying shears for bars and wires based on T400 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613481A (en) * | 2019-01-10 | 2019-04-12 | 重庆大学 | A kind of Wave beam forming identification of sound source method adapting to wind tunnel test environment |
| CN111922101A (en) * | 2020-08-20 | 2020-11-13 | 中天钢铁集团有限公司 | High-speed wire packet type arranging equipment and control method thereof |
| CN111922101B (en) * | 2020-08-20 | 2024-05-28 | 中天钢铁集团有限公司 | High-speed coil type normalization equipment and control method thereof |
| CN112068491A (en) * | 2020-09-02 | 2020-12-11 | 四川省达州钢铁集团有限责任公司 | Method for improving response speed of flying shear |
| CN112068491B (en) * | 2020-09-02 | 2021-09-21 | 四川省达州钢铁集团有限责任公司 | Method for improving response speed of flying shear |
| CN113714302A (en) * | 2021-08-06 | 2021-11-30 | 阳春新钢铁有限责任公司 | Hook type recoil control method for changing tail ring of dual-high-speed wire rolling |
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Application publication date: 20130327 |