CN103451410B - A kind of process furnace walking beam velocity curve fast adjustment method - Google Patents
A kind of process furnace walking beam velocity curve fast adjustment method Download PDFInfo
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- CN103451410B CN103451410B CN201310446836.XA CN201310446836A CN103451410B CN 103451410 B CN103451410 B CN 103451410B CN 201310446836 A CN201310446836 A CN 201310446836A CN 103451410 B CN103451410 B CN 103451410B
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Abstract
The invention provides a kind of process furnace walking beam velocity curve fast adjustment method, comprise the following steps: obtain walking beam speed reference curve; According to the velocity feedback calculation walking beam proportional valve openings of sizes of walking beam displacement sensor and the relation of speed, and measure the dead band velocity magnitude of walking beam proportional valve; According to walking beam speed reference curve, the stationarity of holder steel process and time demand, the speed of calculated step beam, acceleration magnitude and stepping period time; The relation of test speed and proportional valve openings of sizes, according to whole position and the speed parameter of walking beam speed reference curve setting walking beam curve.Process furnace walking beam velocity curve fast adjustment method of the present invention can realize rapid adjustment and the setting of walking beam curve, and account form is simple, and does not rely on the rich experiences of technician, possesses good adaptability and convenience.
Description
Technical field
The present invention relates to technical field of steel rolling, particularly relate to a kind of process furnace walking beam velocity curve fast adjustment method.
Background technology
At present, production unit process furnace important in steel rolling industry, pusher-type furnace and walking beam furnace can be divided into, wherein, pusher-type furnace exist length short, yield poorly and scaling loss large and the problems such as steel bonding can occur when misoperation, thus be difficult to the shortcoming being difficult to overcome realizing automatization, therefore application industrially receives larger restriction.
And walking beam heating furnace transfers steel billet owing to being done regular-shape motion in stove by special stepping mechanism, it effectively eliminates slide rail scratch, and the heating profile of steel billet has a narrow range of temperature, and homogeneous heating.The feature such as also possess that furnace superintendent is unrestricted, output is high and production operation is flexible, it produces the processing requirement meeting high yield, high-quality, low consumption, energy-conservation, nuisanceless and production operation automatization, thus is widely used in the industry.
The walking beam of the walking beam heating furnace of prior art achieves automatization, and the motion of Negotiation speed curve to walking beam controls.And in the debug process of the velocity curve of walking beam, often comparatively serious dependence machinery or the working experience of hydraulic technique personnel, and need the actual positional relationship according to walking beam and stability, repeatedly test and adjust the relation between walking beam acceleration and deceleration Distance geometry velocity variations, until velocity curve can meet make walking beam smooth running, and meet suitable move distance, and obtain the requirements such as suitable stepping period.
Therefore, when commissioning staff does not have experience, and when unfamiliar machinery or hydraulic pressure personnel instruct, be difficult to the debugging completing walking beam velocity curve fast.In addition, in process of production, if when walking beam valve platform or proportional amplifier plate damage and need to change, because the parameters such as the characteristic of different walking beam valve platforms and dead band velocity magnitude are not identical, therefore original velocity curve just can not adapt to completely, and needs again to debug a set of walking beam parameter of curve.This is very difficult for general electrical service personnel, and it is also very difficult good by the parameter adjustment of stepping curve to take a long time.
In addition, with regard to the dead band on proportional amplifier plate and slope adjustment knob, the knob due to existing operating device is not digital setting, and therefore, every block proportional amplifier plate is difficult to be adjusted on all four output dead band and slope value.This is the corresponding output valve slightly nuance causing different proportional amplifier plates just, and its output characteristic exists different.Therefore, due to the nuance difference that proportional amplifier plate is arranged after proportional amplifier plate is changed, and the corresponding velocity curve that causes can not adapt to completely.
By technician completely by manual debugging, not only significantly increase the difficulty of equipment routine maintenance, and have impact on normal production efficiency, production cost is increased.
Therefore, how the simple and convenient walking beam curve automatically controlled process furnace adjusts and just becomes problem demanding prompt solution.
Summary of the invention
For solving prior art, too complicated problem being adjusted to the walking beam curve that process furnace controls automatically, the invention provides a kind of process furnace walking beam velocity curve fast adjustment method, comprising the following steps:
Obtain walking beam speed reference curve;
According to the velocity feedback calculation walking beam proportional valve openings of sizes of walking beam displacement sensor and the relation of speed, and measure the dead band velocity magnitude of walking beam proportional valve;
According to described walking beam speed reference curve, the stationarity of holder steel process and time demand, the speed of calculated step beam, acceleration magnitude and stepping period time;
The relation of test speed and proportional valve openings of sizes, according to whole position and the speed parameter of described walking beam speed reference curve setting walking beam curve.
After whole position of described setting walking beam curve and speed parameter, also comprise: described walking beam curve is finely tuned.
Described described walking beam curve is finely tuned after, also comprise:
Whether detect the peak acceleration of the walking beam in described walking beam curve more than 0.5m/s
2if whether the peak acceleration of the walking beam in described walking beam curve is more than 0.5m/s
2, then the speed minimum value of velocity variations process and the difference of maximum value are adjusted.
Described described walking beam curve is finely tuned after, also comprise: the moving process testing described walking beam curve, detect described moving process and whether accurately arrive the movement position arrests of specifying, and detect stepping period whether suitable.
Process furnace walking beam velocity curve fast adjustment method of the present invention can realize rapid adjustment and the setting of walking beam curve, and account form is simple, and does not rely on the rich experiences of technician, possesses good adaptability and convenience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schema of the embodiment of process furnace walking beam velocity curve fast adjustment method of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the schema of the embodiment of process furnace walking beam velocity curve fast adjustment method of the present invention, and as shown in Figure 1, the process furnace walking beam velocity curve fast adjustment method of the present embodiment can comprise the following steps.
Step 101, obtains walking beam speed reference curve.
Step 102, according to the velocity feedback calculation walking beam proportional valve openings of sizes of walking beam displacement sensor and the relation of speed, and the dead band velocity magnitude of meter proportion valve.
Step 103, according to walking beam speed reference curve, the stationarity of holder steel process and time demand, the speed of calculated step beam, acceleration magnitude and stepping period time.
Step 104, the relation of test speed and proportional valve openings of sizes, according to whole position and the speed parameter of walking beam speed reference curve setting walking beam curve.
Particularly, first, because proportional valve is the main control valve of walking beam, it directly control the motion of walking beam.Therefore, for the acquisition of walking beam curve, the calculating of all parameters, needs the good walking beam speed reference curve of a set of existing process calculating or life-time service as a reference.Use walking beam speed reference curve, significantly can reduce the workload calculating and test on the one hand, two one side effectively can also prevent the appearance of wrong parameter.
According to the velocity feedback calculation walking beam proportional valve openings of sizes of walking beam displacement sensor and the relation of speed, and measure the dead band velocity magnitude of walking beam proportional valve.Control signal voltage needed for most of walking beam proportional valve of the prior art is between-10V to+10V, the openings of sizes of the walking beam proportional valve corresponding with control signal voltage is-100% to 100%, because the characteristic of different walking beam proportional valve is not identical with dead band.Dead band set on proportional amplifier plate is just not identical with slope variation value, and its output characteristic is not identical yet.Therefore, need according to the velocity feedback of walking beam displacement sensor by the parameter of the walking beam proportional valve newly changed or proportional amplifier plate linearly relation correspondence calculate new parameter.
With walking beam speed reference curve for foundation, due to the openings of sizes of hydraulicvalve and length velocity relation substantially linear, the length velocity relation that therefore just can well solve different valve recalculates the problem of again mating.The relation of walking beam proportional valve openings of sizes and speed specifically roughly can be calculated by the existing walking beam theory of computation in this area.Such as, according to the walking beam Theoretical Calculation lifting displacement shown in table 1 and acceleration and deceleration requirement, and can require according to the walking beam Theoretical Calculation translational displacement shown in table 2 and acceleration and deceleration the acceleration and deceleration value calculating certain process furnace walking beam.
It should be noted that, the needs of the slope setting demand fulfillment sequence of control of proportional amplifier plate, the slope setting of proportional amplifier plate defines the velocity variations time of sequence of control.Wherein, the acceleration and deceleration velocity of variation of walking beam curve is mainly controlled by computer program, i.e. required by the slope setting demand fulfillment sequence of control of proportional amplifier plate top speed velocity of variation.In addition generally speaking, the slope setting of proportional amplifier plate only need meet 0.5m/s
2requirement.
| Sequence number | Time (s) | Oil cylinder displacement (mm) | Proportional valve input value |
| 1 | 1.1 | 55.59 | 0～83％ |
| 2 | 3.0 | 289.09 | 83％ |
| 3 | 0.8 | 44.47 | 83％～38％ |
| 4 | 2.5 | 111.19 | 38％ |
| 5 | 0.8 | 44.47 | 38％～83％ |
| 6 | 3.0 | 289.09 | 83％ |
| 7 | 1.1 | 55.59 | 83％～0 |
| ∑ | 12.3 | 889.53 | - |
The lifting displacement of table 1 walking beam Theoretical Calculation and acceleration and deceleration requirement
| Sequence number | Time (s) | Oil cylinder displacement (mm) | Proportional valve input value |
| 1 | 1.0 | 40 | 0～57％ |
| 2 | 2.5 | 180 | 57％ |
| 3 | 0.8 | 15 | 57％～30％ |
| 4 | 0.6 | 10 | 30％ |
| 5 | 0.2 | 5 | 30％～0 |
| ∑ | 5.1 | 250 | - |
Table 2 walking beam Theoretical Calculation translational displacement and acceleration and deceleration requirement
Secondly, after the openings of sizes of proportional valve determining walking beam and the relation of speed, need according to concrete equipment and production technique the stationarity of holder steel process and temporal real needs, definition walking beam can be calculated further according to walking beam speed reference curve and reach concrete speed needed for corresponding technic index, the size of acceleration and stepping period time.Because these values are linear all mutually, therefore can calculate simply and easily.After above-mentioned theory parameter is fixing, just tentatively can obtain operable walking beam curve, the position that such walking beam just can be specified according to walking beam Curves and velocity curve carry out action just can meet the control needs produced substantially.
After tentatively determining walking beam curve roughly, further can the relation of test speed and proportional valve openings of sizes, set and improve all positions and the speed parameter of walking beam curve, to complete the setting up procedure of walking beam curve.
According to the relation of speed and walking beam proportional valve openings of sizes, when according to walking beam speed reference curve, (the velocity variations location parameter in walking beam speed reference curve can all remain unchanged, and only calculates corresponding length velocity relation can be undertaken automatically calculating parameter new accordingly by computer program.Such as, in walking beam speed reference curve, walking beam proportional valve at least will reach 13% and just have walking beam action, and present new walking beam proportional valve may need the signal just meeting action of 18%, and this is dead band.And for example, the speed of 30mm/s in the corresponding walking beam speed reference curve of 25% possibility, present new walking beam proportional valve then may need out 40% just can reach this speed.Therefore, according to original walking beam speed reference curve, then the parameter of the opening degree new accordingly of the parameter of corresponding walking beam speed reference curve just can be calculated according to the dead band of new walking beam proportional valve, opening degree and length velocity relation.This is because speed is determined, just different walking beam proportional valve or the dead band corresponding to proportional amplifier plate, opening and length velocity relation have become, and adjust new parameter constant with maintenance speed.)。
The process furnace walking beam velocity curve fast adjustment method of the present embodiment can realize rapid adjustment and the setting of walking beam curve, and account form is simple, and does not rely on the rich experiences of technician, possesses good adaptability and convenience.
Preferably, after whole position of the setting walking beam curve of step 103 and speed parameter, can further include: walking beam curve is finely tuned.Because the walking beam curve tentatively obtained to step 103 by step 101 is preliminary curve, it can meet the general needs of production, if especially this line is the curve automatically calculating generation according to the walking beam curve negotiating debugged, then this curve meets production requirement substantially.And in order to improve the precision of control, can also further finely tune the walking beam curve obtained by step 103 further.Also can according to practical situation, fine setting debugging completes a set of walking beam parameter, becomes a set of reference parameter.In production process so afterwards, when needing due to a variety of causes to debug walking beam curve, as long as the requirement that all positions and speed point can meet reference parameter just can realize the motion control requirement of the walking beam of relevant device substantially.In the process that walking beam runs, the speed of walking beam at flex point place, each acceleration and deceleration position can also be recorded further, to carry out the verification of walking beam curve by the speed feedback value of sensor.
In addition, when walking beam valve platform or proportional amplifier plate damage or break down and need to change, first valve platform or proportional amplifier plate should more be finished changing.Concrete steps can be the automatic steps that operator pass through to press the computer program realization that corresponding testing button starts: first, when human assistance, by the automatic control program auxiliary testing valve platform dead band automatically of prior art, dead band adjustment aim value is about the control signal sending to proportional valve 15% to 19%.Automatic control program automatically given 16% control signal, then can be adjusted knob by the dead band of slowly rotating proportional amplifier plate manually until walking beam can rotate.If walking beam cannot rotate, then automatically can strengthen control signal 1% to 2%, then repeat above-mentioned steps until walking beam can move.
Afterwards, automatically walking beam slope curve is adjusted.In the ordinary course of things, the slope knob on proportional amplifier plate substantially can be motionless.But in slope test process, if the requirement on discontented full border, can trickle the tuned slope velocity of variation.And according to the requirement of walking beam velocity curve, wherein, the variable quantity of 60% needs to complete at least 2 seconds.By program subtest, can judge that can current state meet this velocity of variation, if do not met, need by adjusting knob manually, then whether can reach required rate of change by program test.This is because dead band and the slope adjusted value of different proportional amplifier plates are different, and the characteristic of output is also different.By manually adjusting knob, computer program is measured automatically, until speed and slope variation curve fit.Generally speaking, slope test meets lower than 0.5m/S
2acceleration can think and reach requirement.
Then, fed back by the automatic control program Negotiation speed of prior art or utilized time and range formula automatically to test the corresponding relation of proportional valve opening and speed, according to the principle of hydraulic pressure, the change of proportional valve opening corresponding speed is substantially linearly proportional.Therefore, two spot speed and the proportional valve opening relationship of difference at least 40% need be tested.Such as, can the speed of meter proportion valve opening 25% time, and in the speed of proportional valve opening 65% time.According to linear ratio relation, the walking beam speed that proportional valve is corresponding when another openings of sizes can be calculated.In addition, it should be noted that the control signal below dead band is inoperative because system protection is arranged.
Further preferably, after walking beam curve is finely tuned, can further include: whether detect the peak acceleration of the walking beam in walking beam curve more than 0.5m/s
2if the peak acceleration of the walking beam in walking beam curve is more than 0.5m/s
2, then the speed minimum value of velocity variations process and the difference of maximum value are adjusted.Generally speaking, for ensureing production safety, prevent when walking beam acceleration is excessive, steel billet is subjected to displacement due to inertia effect, causes industrial accident, and the safety that impact is produced is carried out.Therefore, need to limit to the peak acceleration of the walking beam detected in walking beam curve, the peak acceleration of the walking beam in general requirement walking beam curve is no more than 0.5m/s
2.Therefore, for guaranteeing production safety further, further can verify the walking beam curve after fine setting, confirming that the peak acceleration of the walking beam in walking beam curve is no more than 0.5m/s
2.If find that the peak acceleration of the walking beam in walking beam curve exists more than 0.5m/s
2situation occur, just needs adjust the speed minimum value of corresponding velocity variations process and the difference of maximum value, to ensure that the safety of production is carried out.In addition, for fully ensuring safety, the original speed that walking beam starts, and deceleration when stopping stops speed, preferably no more than dead band speed 15% point, if namely dead band speed is 15%, then original speed is preferably lower than 30%.
After the relation curve obtaining proportional valve opening degree and corresponding speed change, automatically being calculated by the automatic control program of prior art will according to the openings of sizes degree of the proportional valve required for corresponding to the speed needed for walking beam curved path walking debug at first, then automatic control program when keeping the invariant position of velocity variations flex point automatic adjust required for walking beam speed export to the signal of valve platform openings of sizes.
According to the step of foregoing description, the upcurve of the lift valve of walking beam and the advance curve of shiftable valve can have been debugged respectively, and decline and the parameter of curve and the rising that retreat and advance curve direct corresponding.
Further preferably, after walking beam curve is finely tuned, can further include: the moving process of test walking beam curve, detect moving process and whether accurately arrive the movement position arrests of specifying, and whether detect stepping period suitable.In order to ensure that walking beam can reach the movement position arrests of specifying in strict accordance with the requirement of walking beam curve, the curvilinear motion process specifically can tested rising, advance, decline further respectively and retreat, detects each motion and whether accurately can arrive the movement position arrests of specifying.If error has exceeded 1mm, then automatic control program adjustment can close valve position automatically.If the DeGrain of adjustment, then can adjust speed when arriving object point and the variation range of position further.Such as, for advance curve, if increase the end speed 2% of the even deceleration of last advance section, then slope deceleration distance needs corresponding increase by 3%, and vice versa.So just can improve the accuracy of walking beam curve further, the security of corresponding raising equipment.It should be noted that, the test of dead band and slope variation, need hand fit to carry out.This is because dead band and the slope adjusted value of different proportional amplifier plates are different, its characteristic exported also there are differences.When testing this two parameters, needing manually to adjust knob, automatically being measured by computer program, until speed and slope variation curve fit.
Afterwards, automatic control program carries out walking beam calculating cycle time.If cycle time is long or too short, by amendment walking beam in the flex point residence time, top speed is reduced, or parameter adjustment such as adjustment Acceleration and deceleration time etc. is revised.
In addition, when the function of walking beam displacement sensor without velocity survey, correspondingly carrying out computing velocity by recording time that move distance spends in program, equally also can complete above-mentioned measurement.
And identical with the debugging of above-mentioned external proportional amplifier plate for the adjustment method of built-in proportional amplifier plate, also can save the adjustment to dead band and slope.Wherein because the work-ing life of external proportional amplifier plate can, higher than built-in proportional amplifier plate, therefore still use external proportional amplifier plate more economical.
Rely on carried out the according to the method described above calculating of automatic control program, the running status that substantially can meet the running status of walking beam good with the most initial debugging is consistent.If after above-mentioned fast automatic debugging, walking beam still cannot reach ideal movements state, then can carry out trickle artificial adjustment on the basis of the parameter calculated, until meet production requirement.
Further, in walking beam moving process, introduce velocity feedback closed loop feedback to carry out control and can reach walking beam and measure more accurately and control, can avoid when valve or physical construction break down simultaneously yet, the speed of walking beam is not controlled and the accident that occurs.
Process furnace walking beam velocity curve fast adjustment method of the present invention can realize rapid adjustment and the setting of walking beam curve, and account form is simple, and do not rely on the rich experiences of technician, possess good adaptability and convenience, effectively can ensure normally carrying out of production on the one hand, effectively can also ensure the security of producing on the other hand, can effectively enhance productivity.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a process furnace walking beam velocity curve fast adjustment method, is characterized in that, comprise the following steps:
Obtain walking beam speed reference curve;
According to the relation of the velocity feedback calculation walking beam proportional valve openings of sizes of walking beam displacement sensor and the speed of walking beam, and measure the dead band velocity magnitude of described walking beam proportional valve;
According to described walking beam speed reference curve, the stationarity of holder steel process and time demand, speed needed for the different positions point of calculated step beam in movement travel, required acceleration size and required stepping period time;
Utilize speed, required acceleration size and required stepping period time needed for the relation of the speed of described walking beam and described proportional valve openings of sizes, the walking beam different positions point in movement travel, according to described walking beam speed reference curve, whole position of the walking beam curve after setting corrects and speed parameter.
2. process furnace walking beam velocity curve fast adjustment method according to claim 1, is characterized in that, after the whole position of walking beam curve after described setting corrects and speed parameter, also comprises: finely tune described walking beam curve.
3. process furnace walking beam velocity curve fast adjustment method according to claim 2, is characterized in that, described described walking beam curve is finely tuned after, also comprise:
Whether detect the peak acceleration of the walking beam in described walking beam curve more than 0.5m/s
2if the peak acceleration of the walking beam in described walking beam curve is more than 0.5m/s
2, then the speed minimum value of velocity variations process and the difference of maximum value are adjusted.
4. process furnace walking beam velocity curve fast adjustment method according to claim 2, it is characterized in that, described described walking beam curve is finely tuned after, also comprise: the moving process testing described walking beam curve, detect described moving process and whether accurately arrive the movement position arrests of specifying, and whether detect stepping period suitable.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1979364A (en) * | 2005-12-06 | 2007-06-13 | 邹高能 | Precision digital step controller |
| CN2924110Y (en) * | 2006-06-29 | 2007-07-18 | 宝山钢铁股份有限公司 | Heating-furnace lifting hydraulic system without vibration and squeal |
| CN201653131U (en) * | 2009-09-28 | 2010-11-24 | 中冶东方工程技术有限公司 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
-
2013
- 2013-09-27 CN CN201310446836.XA patent/CN103451410B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1979364A (en) * | 2005-12-06 | 2007-06-13 | 邹高能 | Precision digital step controller |
| CN2924110Y (en) * | 2006-06-29 | 2007-07-18 | 宝山钢铁股份有限公司 | Heating-furnace lifting hydraulic system without vibration and squeal |
| CN201653131U (en) * | 2009-09-28 | 2010-11-24 | 中冶东方工程技术有限公司 | Hydraulic lifting system for walking beam of large-sized walking beam furnace |
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