CN114226472A - Screwdown system oscillation detection method and device - Google Patents
Screwdown system oscillation detection method and device Download PDFInfo
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- CN114226472A CN114226472A CN202111407431.6A CN202111407431A CN114226472A CN 114226472 A CN114226472 A CN 114226472A CN 202111407431 A CN202111407431 A CN 202111407431A CN 114226472 A CN114226472 A CN 114226472A
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- 230000010355 oscillation Effects 0.000 title claims abstract description 94
- 238000001514 detection method Methods 0.000 title abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims description 34
- 238000005096 rolling process Methods 0.000 claims description 20
- 230000000881 depressing effect Effects 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
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- 239000002699 waste material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Abstract
The invention discloses a method and a device for detecting vibration of a screw-down system, which comprise the following steps: acquiring a valve opening value of a servo valve of a pressing system; determining a first number of switches of the valve flag between the first valve flag and the second valve flag; and when the first switching times exceed the first preset times, determining that the pressing system vibrates. The oscillation detection method provided by the application can be used for rapidly and accurately detecting oscillation by acquiring the valve opening degree of the servo valve to identify oscillation, so that the detection efficiency and the accuracy are improved. The oscillation detection method provided by the application avoids the problem that small oscillation cannot be found in the manual detection process, and also avoids the problem that more quality reduction of the strip steel is caused because the oscillation lasts for a period of time when large oscillation is found manually.
Description
Technical Field
The invention relates to the technical field of screwdown equipment control, in particular to a screwdown system oscillation detection method and device.
Background
The reduction control system is in a state of being adjusted constantly in the production process of the rolling mill, and the production stability of the reduction control system is influenced by a plurality of factors such as rolling force, tension, roller roughness, lubrication, cooling, control system parameters and the like, so that the reduction system is easy to vibrate. When oscillation occurs, the roller shakes at the roller gap with high frequency, so that transverse roller marks on the surface of the strip steel are caused, products are degraded, even waste is judged, and mechanical equipment such as side supports can be damaged by long-term oscillation. However, in the related art, it is determined manually whether the oscillation occurs, however, the manual work can only find the oscillation with a larger amplitude, and when the manual work finds the oscillation with a larger amplitude, the quality of the strip steel is also reduced, so that the problem of low accuracy exists in determining manually whether the oscillation occurs.
Disclosure of Invention
The embodiment of the application provides a method and a device for detecting the oscillation of a pressing system, solves the technical problem that the accuracy of oscillation is low in the prior art, and achieves the technical effect of improving the accuracy of oscillation finding.
In a first aspect, the present application provides a method for detecting shock of a screw-down system, the method comprising:
acquiring a valve opening value of a servo valve of a pressing system;
determining a first number of switches of the valve flag between the first valve flag and the second valve flag;
and when the first switching times exceed the first preset times, determining that the pressing system vibrates.
Further, the method further comprises:
acquiring the roll gap offset of a pressing system;
determining a second switching frequency of the roll gap mark between the first roll gap mark and the second roll gap mark;
and when the second switching times exceed a second preset time, determining that the pressing system vibrates.
Further, the method further comprises:
acquiring a valve core deviation value of a valve core of a servo valve of a pressing system;
determining a third number of switches of the spool flag between the first spool flag and the second spool flag;
and when the third switching times exceed a third preset time, determining that the system is pressed to vibrate.
Further, after determining that the system is oscillating under the pressure, the method further comprises:
and adjusting the gain coefficient of the system under the control pressure to be a first preset gain threshold value.
Further, after the gain factor of the system is adjusted to the first preset gain threshold under the control pressure, the method further comprises:
judging whether the pressing system eliminates the oscillation or not;
and when the screw-down system does not eliminate oscillation, controlling the gain coefficient of the screw-down system to be adjusted to a second preset gain threshold value, and/or controlling the production speed of the steel rolling equipment matched with the screw-down system to be reduced according to a first preset speed threshold value.
Further, after determining that the system is oscillating under the pressure, the method further comprises:
acquiring the production speed of steel rolling equipment matched with the screw-down system;
and when the production speed is greater than or equal to the second preset speed threshold, controlling the production speed of the steel rolling equipment to be reduced according to a third preset speed threshold.
Further, after controlling the production speed of the hold-down system to decrease by the third preset speed threshold, the method further comprises:
judging whether the pressing system eliminates the oscillation or not;
and when the screw-down system does not eliminate oscillation, controlling the gain coefficient of the screw-down system to be adjusted to a third preset gain threshold value, and/or controlling the production speed of the steel rolling equipment to be reduced according to a fourth preset speed threshold value.
In a second aspect, the present application provides a screw-down system oscillation detection device, comprising:
the acquisition module is used for acquiring a valve opening value of a servo valve of the pressing system;
a counting module for determining a first number of switching times of the valve mark between the first valve mark and the second valve mark;
and the oscillation judging module is used for determining that the pressing system oscillates when the first switching times exceed the first preset times.
Further, the obtaining module is also used for obtaining the roll gap offset of the pressing system;
the counting module is also used for determining the second switching times of the roll gap marks between the first roll gap mark and the second roll gap mark;
and the oscillation judging module is further used for determining that the pressing system oscillates when the second switching times exceed a second preset time.
Further, the obtaining module is also used for obtaining a valve core deviation value of a valve core of a servo valve of the pressing system;
the counting module is further used for determining a third switching number of the valve core mark between the first valve core mark and the second valve core mark;
and the oscillation judging module is further used for determining that the pressing system oscillates when the third switching frequency exceeds a third preset frequency.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the method for detecting the vibration of the pressing system, the first switching times of the valve mark between the first valve mark and the second valve mark are determined by obtaining the valve opening value of the servo valve of the pressing system, and whether the pressing system vibrates or not is determined according to the switching times. The oscillation detection method provided by the application can be used for rapidly and accurately detecting oscillation by acquiring the valve opening degree of the servo valve to identify oscillation, so that the detection efficiency and the accuracy are improved. The oscillation detection method provided by the application avoids the problem that small oscillation cannot be found in the manual detection process, and also avoids the problem that more quality reduction of the strip steel is caused because the oscillation lasts for a period of time when large oscillation is found manually.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting oscillation according to a valve opening degree according to the present disclosure;
FIG. 2 is a flow chart of a method for detecting oscillation via roll gap offset according to the present disclosure;
FIG. 3 is a flow chart of a method for detecting oscillation via valve core position offset according to the present disclosure;
fig. 4 is a schematic structural diagram of a shake detection device of a screw-down system according to the present application.
Detailed Description
The embodiment of the application provides a method for detecting the oscillation of a pressing system, and solves the technical problem that the accuracy of oscillation is low in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a method for detecting vibration of a pressing system comprises the following steps: acquiring a valve opening value of a servo valve of a pressing system; determining a first number of switches of the valve flag between the first valve flag and the second valve flag; and when the first switching times exceed the first preset times, determining that the pressing system vibrates.
The oscillation detection method provided by the embodiment can be used for rapidly and accurately detecting oscillation by acquiring the valve opening degree of the servo valve to identify the oscillation, so that the detection efficiency and the accuracy are improved. The oscillation detection method provided by the embodiment avoids the problem that small oscillation cannot be found in the manual detection process, and also avoids the problem that when large oscillation is found manually, the oscillation lasts for a period of time, and the quality of more strip steel is reduced.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The embodiment provides three different methods for detecting the vibration of the pressing system, and the three methods can be used independently, can also be used by any two or three of the methods simultaneously, and can also be used in a matching way to a certain extent. First, the present embodiment will explain the three modes as follows.
[ MEASUREMENT MODE I ]
As shown in fig. 1, a method for detecting shock of a pressing system includes:
step S11, obtaining a valve opening value of a servo valve of the pressing system;
step S12, determining a first number of switching times of the valve flag between the first valve flag and the second valve flag;
and step S13, when the first switching times exceed the first preset times, determining that the pressing system vibrates.
When the pressing system oscillates, the valve opening of the servo valve is greatly changed. Therefore, the valve opening value of the servo valve is obtained in real time and recorded in the embodiment.
Setting a valve mark which can be a mark bit in the program, setting the valve mark as a first valve mark when the valve opening value is larger than the preset value of positive opening, and setting the valve mark as a second valve mark when the valve opening value is larger than the preset value of negative opening. For example, the first valve flag may be a symbol of 1, A, a, etc., and the second valve flag may be a symbol of 0, B, b, etc.
The preset positive opening value and the preset negative opening value may be equal in value or unequal. Both positive and negative directions of the preset positive and negative opening values represent positive and negative directions of the servo valve. For example, the preset value of the positive opening degree is 80% of the maximum opening degree in the positive direction, and the preset value of the negative opening degree is 80% of the maximum opening degree in the negative direction.
Of course, the valve opening value being greater than the preset forward opening value can also be expressed as the valve opening value being greater than the maximum value of the preset opening range; similarly, a valve opening value greater than the negative opening preset value may also be expressed as a valve opening value less than the minimum of the preset range of openings. The preset valve opening range can be a numerical range formed by dividing a positive end value and a negative end value. For example, the preset range of the valve opening degree is ± 80% of the maximum opening degree of the valve, the maximum value of the preset range of the opening degree is + 80% of the maximum opening degree of the valve, and the minimum value of the preset range of the opening degree is-80% of the maximum opening degree of the valve.
And judging the acquired valve opening value, wherein the valve mark can be switched between the first valve mark and the second valve mark, and when the first switching frequency between the first valve mark and the second valve mark exceeds a first preset frequency, the system is pressed to oscillate.
In order to further improve the detection accuracy, a time factor may be added, for example, when the first switching frequency between the two exceeds a first preset frequency, it is determined whether the statistical time of the first switching frequency exceeds a first preset time, if so, it means that the valve opening has changed within the preset time by more than the first preset frequency, and it may be determined from the change frequency that the pressing system has oscillated. The first preset time can be set and adjusted according to specific conditions.
[ MEASUREMENT MODE II ]
As shown in fig. 2, a method for detecting shock of a pressing system includes:
step S21, acquiring the roll gap offset of the pressing system;
step S22, determining a second switching frequency of the roll gap mark between the first roll gap mark and the second roll gap mark;
and step S23, when the second switching times exceed a second preset time, determining that the pressing system vibrates.
When the pressing system oscillates, the position of the roll gap can also change greatly. Therefore, in this embodiment, the roll seam position is obtained in real time, and the roll seam offset is recorded.
Setting a roll gap mark, wherein the roll gap mark can be a mark position in the program, setting the roll gap mark as a first roll gap mark when the roll gap offset is larger than the positive roll gap offset, and setting the roll gap mark as a second roll gap mark when the roll gap offset is larger than the negative roll gap offset. For example, the first roll gap indicator may be a +1, etc. symbol and the second roll gap indicator may be a-1, etc. symbol.
The positive roll gap offset and the negative roll gap offset may be equal in value or unequal. The positive direction and the negative direction in the positive roll gap offset and the negative roll gap offset represent the positive direction and the negative direction of the roll gap offset. For example, the positive roll gap offset is 15um, and the negative opening preset value is 15 um.
Of course, the offset of the roll gap larger than the offset of the forward roll gap can also be expressed as that the offset of the roll gap is larger than the maximum value of the preset offset range of the roll gap; similarly, a roll gap offset greater than a negative roll gap offset may also be expressed as a roll gap offset less than a minimum of a preset roll gap offset range. The preset roll gap deviation range can be a numerical range formed by dividing a positive end point value and a negative end point value. For example, if the roll gap deviation preset range is ± 15um, the maximum value of the roll gap deviation preset range is +15um, and the minimum value of the roll gap deviation preset range is-15 um.
And judging the acquired roll gap offset, wherein the roll gap mark may be switched between the first roll gap mark and the second roll gap mark, and when the second switching time between the first roll gap mark and the second roll gap mark exceeds a second preset time, the roll gap mark means that the pressing system has oscillated.
In order to further improve the detection accuracy, a time factor may be added, for example, when the second switching number between the two exceeds a second preset number, it is determined whether the statistical time of the second switching number exceeds the second preset time, if so, it means that the roll gap offset has changed by a valve exceeding the second preset number within the preset time, and it may be determined from the change frequency that the pressing system has oscillated. The second preset time can be set and adjusted according to specific conditions.
[ MEASUREMENT MODE III ]
As shown in fig. 3, a method for detecting shock of a pressing system includes:
step S31, acquiring a valve core deviation value of a servo valve core of the pressing system;
step S32, determining a third switching number of times that the spool flag is between the first spool flag and the second spool flag;
and step S33, when the third switching times exceed a third preset time, determining that the pressing system vibrates.
When the depressing system oscillates, the spool of the servo valve is greatly displaced. Therefore, in the embodiment, the position of the valve core of the servo valve is obtained in real time, and the deviation value of the valve core is recorded.
Setting a valve core mark which can be a mark position in the program, setting the valve core mark as a first valve core mark when the valve core deviation value is larger than the positive valve core deviation value, and setting the valve core mark as a second valve core mark when the valve core opening value is larger than the negative valve core deviation value. For example, the first spool flag may be a symbol of 1, A, a, etc., and the second spool flag may be a symbol of 0, B, b, etc.
The positive and negative spool bias values may or may not be equal in value. Both positive and negative of the positive and negative spool bias values represent positive and negative directions of servo valve spool offset. For example, the positive spool offset value is 60% of the positive maximum amplitude, and the negative opening preset value is 60% of the negative maximum amplitude.
Of course, the case deviation value greater than the forward case deviation value can also be expressed as the case deviation value is greater than the maximum value of the case deviation preset range; similarly, a valve core offset value greater than a negative valve core offset value may also be expressed as a valve core offset value less than the minimum value of the preset range of valve core offsets. The preset range of the valve core deviation can be a numerical range formed by dividing a positive end value and a negative end value. For example, the preset range of spool deviation is ± 60% of the maximum amplitude of the spool, and then the maximum value of the preset range of spool deviation is + 60%, and the minimum value of the preset range of spool deviation is-60%.
And judging the obtained valve core deviation value, wherein the valve core mark can be switched between the first valve core mark and the second valve core mark, and when the third switching frequency between the first valve core mark and the second valve core mark exceeds a third preset frequency, the system is pressed to oscillate.
In order to further improve the detection accuracy, a time factor may be added, for example, when the third switching frequency between the two exceeds a third preset frequency, it is determined whether the statistical time of the third switching frequency exceeds a third preset time, if so, it means that the valve element deviation value changes by more than the third preset frequency within the preset time, and it may be determined from the change frequency that the depressing system has oscillated. The third preset time can be set and adjusted according to specific situations.
The three modes provided by the embodiment can be used separately, or any two or three of the three can be used simultaneously, or can be used in cooperation with each other to a certain extent. For example, when two of the three modes are arbitrarily selected for simultaneous use, the two modes are respectively marked as a mode N1 and a mode N2, and the screwdown system can be considered to be vibrated only when the mode N1 and the mode N2 both determine that the screwdown system is vibrated; the screw-down system may also be considered to oscillate in the case where the mode N1 or the mode N2 determines that the screw-down system oscillates. Of course, priority may be set between the method N1 and the method N2, for example, the method N1 is set as the first level, the method N2 is set as the second level (the level of the first level is higher than that of the second level), when the method N1 determines that the system is shaking, the system is considered to be shaking, when the method N2 determines that the system is shaking, a preset time needs to be waited, and if the method N2 still determines that the system is shaking. When the three modes of the embodiment are used simultaneously, whether the system oscillates or not can be determined in a similar manner, which is not described herein again.
After it is determined that the shock occurred to the pressing system in the above manner, the shock can be also eliminated in the following manner.
And after determining that the screw-down system vibrates, controlling the gain coefficient of the screw-down system to be adjusted to a first preset gain threshold value. The first preset gain threshold may be set according to specific situations. For example, the first preset gain threshold may be 50% of the gain factor when the oscillation occurs, i.e. the gain factor of the control pressure system is reduced to 50% of the gain factor when the oscillation occurs.
After the gain factor is reduced, it can be determined whether the screw-down system eliminates the oscillation by using the 3 oscillation detection methods provided in this embodiment, that is, whether the screw-down system eliminates the oscillation is determined. When the screwdown system does not eliminate oscillation, the gain coefficient of the screwdown system is controlled to be adjusted to a second preset gain threshold value, and the second preset gain threshold value can be set according to specific conditions. Of course, the production speed of the rolling mill matched with the screw-down system can also be controlled to be reduced according to the first preset speed threshold value. I.e. to reduce the production speed, in order to eliminate the oscillations of the pressing system. In general, the higher the production speed of a rolling mill, the more easily oscillation occurs, so that when oscillation occurs, the oscillation can be eliminated by reducing the production speed.
After the screw-down system is determined to vibrate, the production speed of the steel rolling equipment matched with the screw-down system is obtained; and when the production speed is greater than or equal to a second preset speed threshold, controlling the production speed of the steel rolling equipment to be reduced according to a third preset speed threshold.
When the production speed is too high, the production speed and the gain coefficient can be reduced simultaneously to eliminate oscillation. When the production speed is reduced and the gain coefficient is reduced at the same time, the 3 oscillation detection modes provided by the embodiment can be adopted to determine whether the screw-down system eliminates the oscillation, namely, whether the screw-down system eliminates the oscillation is judged; and when the screw-down system does not eliminate oscillation, controlling the gain coefficient of the screw-down system to be adjusted to a third preset gain threshold value, and/or controlling the production speed of the steel rolling equipment to be reduced according to a fourth preset speed threshold value.
For example, after detecting the system oscillation, judging the current production speed, and if the speed is less than 200m/min, automatically reducing the gain coefficient of the position control of the pressing system to 50% of the original value by the program; if the speed is more than or equal to 200m/min, the gain coefficient is automatically reduced to 50 percent, and the speed of the rolling mill is automatically triggered to be reduced by at least 50 m/min.
In conclusion, the oscillation detection method provided by the embodiment avoids the problem that small oscillations cannot be found in the manual detection process, and also avoids the problem that when large oscillations are found manually, the oscillations last for a period of time, and the quality of the strip steel is reduced greatly. The oscillation detection method provided by the embodiment can quickly and accurately detect oscillation by acquiring the valve opening of the servo valve, the roll gap position deviation and/or the valve core position deviation to identify the oscillation, so that the detection efficiency and the accuracy are improved. After the oscillation is identified, the oscillation can be eliminated in time in a mode of reducing the gain coefficient and the production speed of the system, so that the oscillation is avoided from causing more quality reduction of the strip steel, for example, the defect of transverse roll mark caused by the oscillation of the pressing system can be eliminated, and the damage of the oscillation of the pressing system to mechanical equipment can be eliminated.
By using the oscillation detection method and the oscillation elimination method provided by the embodiment, the problems of product degradation and waste product generation caused by oscillation of the unit can be avoided, under the optimal condition, the effect of no waste product can be realized, meanwhile, the adverse effect of the oscillation on mechanical equipment can be avoided, and the service life of mechanical equipment such as long-side support, thrust bearing and the like can be prolonged. In addition, the speed of the unit is not limited, the unit can be operated at the highest production speed on the premise of ensuring the product quality, and the capacity is greatly released.
In the test process, the test unit can averagely reduce 50 tons of degraded products per month, reduce 35 tons of waste products, and produce 20 tons of produced products per month in the capacity, wherein the produced benefits are [50 x (5000 + 4600) +35 x (5000 + 2000) +20 x 1500] } 12 x 186 yuan per year according to the product sale price of 5000 yuan/ton, the degraded product sale price of 4600 yuan/ton, the waste sale price of 2000 yuan/ton and the ton steel profit of 1500 yuan; the replacement period of the side support and the thrust bearing is increased from 3 years to 5 years, the replacement cost of spare parts is 130 ten thousand yuan, the average annual spare part cost is saved (1/3-1/5) × 130 ═ 17.3 ten thousand yuan, and the comprehensive annual benefit is 186+17.3 ═ 203.3 ten thousand yuan.
Based on the same inventive concept, the present embodiment further provides a device for detecting shock of a pressing system as shown in fig. 4, the device comprising:
an obtaining module 41, configured to obtain a valve opening value of a servo valve of the pressing system;
a counting module 42 for determining a first number of switches of the valve flag between the first valve flag and the second valve flag;
and an oscillation judging module 43, configured to determine that the pressing system oscillates when the first switching time exceeds a first preset time.
Further, the obtaining module 41 is further configured to obtain a roll gap offset of the pressing system;
the counting module 42 is further configured to determine a second switching number of the roll gap mark between the first roll gap mark and the second roll gap mark;
the oscillation determining module 43 is further configured to determine that the pressing system oscillates when the second switching time exceeds a second preset time.
Further, the obtaining module 41 is further configured to obtain a valve core deviation value of a valve core of a servo valve of the depressing system;
a count module 42 further configured to determine a third number of toggles of the spool flag between the first spool flag and the second spool flag;
the oscillation determining module 43 is further configured to determine that the pressing system oscillates when the third switching time exceeds a third preset time.
Further, the apparatus further comprises:
and the gain control module is used for controlling the gain coefficient of the depressing system to be adjusted to a first preset gain threshold value.
Further, the apparatus further comprises:
the rechecking module is used for judging whether the pressing system eliminates the oscillation or not;
the gain control module is also used for controlling the gain coefficient of the depressing system to be adjusted to a second preset gain threshold value when the depressing system does not eliminate oscillation;
and the speed control module is used for controlling the production speed of the steel rolling equipment matched with the screw-down system to be reduced according to a first preset speed threshold when the screw-down system does not eliminate oscillation.
Further, the apparatus further comprises:
the speed detection module is used for acquiring the production speed of the steel rolling equipment matched with the screw-down system;
and the speed control module is also used for controlling the production speed of the steel rolling equipment to be reduced according to a third preset speed threshold when the production speed is greater than or equal to the second preset speed threshold.
Further, the rechecking module is also used for judging whether the pressing system eliminates the oscillation or not;
the gain control module is also used for controlling the gain coefficient of the depressing system to be adjusted to a third preset gain threshold value when the depressing system does not eliminate oscillation;
and the speed control module is also used for controlling the production speed of the steel rolling equipment to be reduced according to a fourth preset speed threshold value.
Since the electronic device described in this embodiment is an electronic device used for implementing the method for processing information in this embodiment, a person skilled in the art can understand the specific implementation manner of the electronic device of this embodiment and various variations thereof based on the method for processing information described in this embodiment, and therefore, how to implement the method in this embodiment by the electronic device is not described in detail here. Electronic devices used by those skilled in the art to implement the method for processing information in the embodiments of the present application are all within the scope of the present application.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for detecting shock in a screw down system, the method comprising:
acquiring a valve opening value of a servo valve of the pressing system;
determining a first number of switches of the valve flag between the first valve flag and the second valve flag;
and when the first switching times exceed a first preset time, determining that the pressing system vibrates.
2. The method of claim 1, wherein the method further comprises:
acquiring the roll gap offset of the pressing system;
determining a second switching frequency of the roll gap mark between the first roll gap mark and the second roll gap mark;
and when the second switching times exceed a second preset time, determining that the pressing system vibrates.
3. The method of claim 1, wherein the method further comprises:
acquiring a valve core deviation value of a valve core of a servo valve of the pressing system;
determining a third number of switches of the spool flag between the first spool flag and the second spool flag;
and when the third switching times exceed a third preset time, determining that the pressing system vibrates.
4. The method of any one of claims 1-3, wherein after determining that the screw down system is oscillating, the method further comprises:
and controlling the gain coefficient of the depressing system to be adjusted to a first preset gain threshold value.
5. The method of claim 4, wherein after controlling the adjustment of the gain factor of the screw down system to a first preset gain threshold, the method further comprises:
judging whether the pressing system eliminates the oscillation or not;
and when the screw-down system does not eliminate oscillation, controlling the gain coefficient of the screw-down system to be adjusted to a second preset gain threshold value, and/or controlling the production speed of the steel rolling equipment matched with the screw-down system to be reduced according to a first preset speed threshold value.
6. The method of any one of claims 1-3, wherein after determining that the screw down system is oscillating, the method further comprises:
acquiring the production speed of steel rolling equipment matched with the screw-down system;
and when the production speed is greater than or equal to a second preset speed threshold, controlling the production speed of the steel rolling equipment to be reduced according to a third preset speed threshold.
7. The method of claim 6, wherein after controlling the production rate of the screw down system to decrease by a third preset rate threshold, the method further comprises:
judging whether the pressing system eliminates the oscillation or not;
and when the screw-down system does not eliminate oscillation, controlling the gain coefficient of the screw-down system to be adjusted to a third preset gain threshold value, and/or controlling the production speed of the steel rolling equipment to be reduced according to a fourth preset speed threshold value.
8. A device for detecting oscillations in a screw down system, said device comprising:
the acquisition module is used for acquiring a valve opening value of a servo valve of the pressing system;
a counting module for determining a first number of switching times of the valve mark between the first valve mark and the second valve mark;
and the oscillation judging module is used for determining that the pressing system oscillates when the first switching times exceed a first preset time.
9. The apparatus of claim 8, wherein the obtaining module is further configured to obtain a roll gap offset of the hold-down system;
the counting module is further used for determining a second switching frequency of the roll gap mark between the first roll gap mark and the second roll gap mark;
the oscillation judging module is further configured to determine that the pressing system oscillates when the second switching frequency exceeds a second preset frequency.
10. The apparatus of claim 8, wherein the obtaining module is further configured to obtain a spool offset value of a spool of a servo valve of the hold-down system;
the counting module is further used for determining a third switching number of the valve core mark between the first valve core mark and the second valve core mark;
the oscillation judging module is further configured to determine that the pressing system oscillates when the third switching frequency exceeds a third preset frequency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407431.6A CN114226472B (en) | 2021-11-24 | Vibration detection method and device for pressing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407431.6A CN114226472B (en) | 2021-11-24 | Vibration detection method and device for pressing system |
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| Publication Number | Publication Date |
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| CN114226472A true CN114226472A (en) | 2022-03-25 |
| CN114226472B CN114226472B (en) | 2024-05-10 |
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