CN112222203B - Control system and control method for double-high-speed wire single-double wire rolling tension adjusting system - Google Patents
Control system and control method for double-high-speed wire single-double wire rolling tension adjusting system Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims abstract description 98
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 147
- 239000010959 steel Substances 0.000 claims abstract description 147
- 230000033764 rhythmic process Effects 0.000 claims description 40
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
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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
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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Abstract
The invention provides a control system and a control method for a tension adjusting system for single and double wire rolling of a double-high line, wherein the control system comprises a tension detector and a medium rolling control adjusting platform connected with the tension detector; the method can quickly, accurately, real-timely and simply control the production bottleneck problem caused by the instability and abnormal conditions of a double-high-speed single-double-line rolling tension adjusting system, prevent the production bottleneck problem in two aspects, on one hand, the steel piling can be caused because the loop cannot be adjusted, on the other hand, the severe fluctuation of the speed of a finishing mill can be caused in the adjusting process of the high-frequency large slope of the loop, the spinning disorder can be caused, and the quality of finished products and disk shapes can be influenced.
Description
Technical Field
The invention belongs to the technical field of steel preparation, and particularly relates to a control system and a control method for a double-high-speed wire single-double wire rolling tension adjusting system.
Background
The following conclusion can be drawn from the large difference in the waveform of the finishing mill and the 1# loop of the I wire and the II wire under the same rolling condition in the normal unavoidable single-double wire rolling process of the double-high wire of the steel rolling mill: assuming that the roll gap of the 13 th rolling mill is set to 4.2 as tension data, the tension data of the line I is 4.2 all the time, and the tension data of the line II is 4.1, 4.0 and 4.3 in the rolling process of one steel. The material shape coming out of the 13 th rolling mill in the line I is almost stable in the rolling process of one steel, and the abnormal stability has no influence on the material shape even when the 13 th rolling mill in the line II throws the steel, but the influence is shown in the waveform record of 12-23 days in 2014. The profile from the 13 th rolling mill on line II has three particularly distinct characteristics: a. if the 13 th rolling mill of the I line passes through steel and the 13 th rolling mill of the II line comes from steel at the moment, the material type output by the 13 th rolling mill of the II line is smaller than the set material type, by way of example, if the roll gap of the 13 th rolling mill is set to be 4.2, the material type output at the moment is only 4.1, so that the 1# of the II line cannot be started, the set height can be reached after a long time, the speed of the finishing mill of the II line is reduced all the time in the process, and the speed of the laying head of the II line is reduced along with the finishing mill; b. if the 13 th rolling mill of the II line passes through steel and the 13 th rolling mill of the I line comes from steel at the moment, the material type coming out of the 13 th rolling mill of the II line immediately becomes larger than the set material type, by way of data illustration, if the roll gap of the 13 th rolling mill is set to be 4.2, the material type coming out at the moment can reach 4.3 of the tension data, so that the sleeve of the 1# of the II line is too high, the set height is reduced after a long time, and the finishing mill of the II line is always at the rising speed in the process, and the wire laying head of the II line follows the rising speed of the finishing mill; c. in the 2-line rolling process of one steel, when the 13 th rolling mill of the 1-line rolls the steel, the hole pattern originally supported by two steel columns is changed into single support, and further the steel at the outlet of the 13# line II is pressed to be small, the essential meaning is that the hole pattern is reduced, and because the speed is not changed, the second flow from the 13# frame of the II-line is reduced in the short time, while the second flow of the 14# frame of the II-line is not changed, so that the loop amount of some loops, namely the loop height is reduced, and in order to adapt to the situation, the finishing mill is decelerated, and the point is not changed. In the normal unavoidable single-double wire rolling process of the double-height wire, the actual loop height of the double-wire loop is abnormal, and the change frequency and the slope are very large, so that the correction amount of the loop reaches the maximum amplitude limit 50 scale, on one hand, steel piling can be caused because the loop cannot be adjusted, on the other hand, the speed of a finishing mill is severely fluctuated in the adjusting process of the high frequency and the slope of the loop, so that the spinning disorder is caused, and the quality of a finished product and a disc shape is influenced.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a control system and a control method for a double-high-speed single-double-line rolling tension adjusting system, which can quickly, accurately, real-timely and simply control the production bottleneck problem caused by the instability and the abnormal condition of the double-high-speed single-double-line rolling tension adjusting system, prevent the production bottleneck problem in two aspects, on one hand, the steel piling caused by the failure of loop adjustment can be caused, and on the other hand, the severe fluctuation of the speed of a finishing mill can be caused in the adjusting process of high frequency and large slope of the loop, so that the spinning disorder can be caused, and the quality of finished products and disk shapes can be influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a control method of a tension adjusting system for double-high-wire single-double-wire rolling, which comprises the following steps:
s1, acquiring tension data of the double-line steel passing at the normal rhythm of the double-line steel passing line;
s2, acquiring steel passing tension data in real time when the double-wire lines are switched between single and double wires;
s3, comparing the steel passing tension data acquired in real time when the single line and the double lines of the double-high line are switched with each other with the steel passing tension data of the double lines of the double-high line at normal rhythm, calculating the difference value between the steel passing tension data acquired when the single line and the double lines of the double lines are switched with each other and the steel passing tension data of the double lines at normal rhythm, and adjusting the tension between two adjacent rolling mills in the double lines according to the difference value between the steel passing tension data acquired when the single line and the double lines of the double lines are switched with each other and the steel passing tension data of the double lines at normal rhythm;
if the steel passing tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the steel passing tension data when the double line and the double line of the double line are in normal rhythm, and the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other is calculated to be more than 0, the tension between two adjacent rolling mills in the double line is progressively reduced and adjusted by taking 0.1-1% as a base number until the steel passing tension when the single line and the double line of the double line are switched with each other is stable, namely the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other and the steel passing tension data of the double line and the double line of the normal rhythm is 0;
if the steel passing tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the steel passing tension data when the double line and the double line are in normal rhythm, and the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other and the steel passing tension data when the normal rhythm and the double line of the double line are switched with each other is calculated to be less than 0, the tension between two adjacent rolling mills in the double line is incrementally adjusted by taking 0.1-1% as a base number until the steel passing tension when the single line and the double line of the double line are switched with each other is stable, namely the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other and the steel passing tension data of the double line and the normal rhythm and the double line is 0;
if the steel passing tension data when the single line and the double line of the double-high line are mutually switched is collected in real time and compared with the steel passing tension data when the double line and the double line of the double line are normally rhythmed, the difference value between the steel passing tension data when the single line and the double line of the double line are mutually switched is calculated to be 0, the tension between two adjacent rolling mills in the double line is kept unchanged, the steel passing tension when the single line and the double line of the double line are mutually switched is kept stable, and namely the difference value between the steel passing tension data when the single line and the double line of the double line are mutually switched is kept to be 0.
According to the control method of the tension adjusting system for the double-high-speed wire single-double wire rolling, the time interval for acquiring the tension data of the double-wire steel passing at the normal rhythm of the double-high-speed wire in the step S1 is t1, the time interval for acquiring the tension data of the steel passing when the double-high-speed wire, the single wire and the double wire are switched in real time in the step S2 is t2, t1 is t2, and t1 is 50 milliseconds.
According to the control method of the tension adjusting system for the single-line and double-line rolling of the double-high line, the step S3 of adjusting the tension between two adjacent rolling mills specifically comprises the following steps: and along the conveying direction of the molten steel, the tension between two adjacent rolling mills in the double-height line is the dynamic push-pull relation between the free moment when the former rolling mill passes the steel and the free moment when the latter rolling mill passes the steel, and the tension between two adjacent rolling mills in the double-height line is adjusted by adjusting the dynamic push-pull relation between the free moment when the former rolling mill passes the steel and the free moment when the latter rolling mill passes the steel.
The invention also provides a control system for the double-high-wire single-double-wire rolling tension adjusting system, which comprises a tension detector and a medium rolling control adjusting platform connected with the tension detector, wherein the medium rolling control adjusting platform comprises a tension collecting unit, a tension comparing unit and a tension adjusting unit between a previous rolling mill and a next rolling mill;
the tension detector is used for detecting the steel passing tension data when the single line and the double line of the double-altitude line are switched with each other;
the tension acquisition unit is used for acquiring the steel passing tension data detected by the tension detector when the double-high-wire single-wire and double-wire are switched with each other;
the tension comparison unit is used for comparing the steel passing tension data acquired in real time when the single line and the double lines of the double-altitude line are switched with each other with the steel passing tension data of the double lines of the double-altitude line in normal rhythm, and calculating the difference value between the steel passing tension data acquired when the single line and the double lines of the double-altitude line are switched with each other and the steel passing tension data of the double lines of the double-altitude line in normal rhythm;
and the tension adjusting unit between the previous rolling mill and the next rolling mill is used for comparing the currently acquired steel passing tension data when the single-line and double-line are switched with the steel passing tension data of the double-line normal rhythm double-line steel passing, calculating the difference value between the steel passing tension data when the single-line and double-line steel passing tension data, and adjusting the tension between the previous rolling mill and the next rolling mill in the double-line according to the difference value between the steel passing tension data when the single-line and double-line steel passing tension data.
According to the control system for the double-high-speed wire single-double wire rolling tension adjusting system, the tension detector comprises the current transformer, the voltage transformer detector and the free torque analog quantity signal receiving module, the current transformer and the voltage transformer detector are used for monitoring and acquiring and identifying the on-site free torque combination signal in real time, and the free torque analog quantity signal is transmitted to the free torque analog quantity signal receiving module through the shielded cable.
The control system for the tension adjusting system for the double-wire single-wire and double-wire rolling is characterized in that data collected by the tension detector, the tension collecting unit, the tension comparing unit and the tension adjusting unit between the previous rolling mill and the next rolling mill in the control system are stored in a storage medium, a plurality of instructions are stored in the storage medium, the instructions are loaded and executed by a processor, and the processor executes a program stored in the storage medium.
The processor and the memory for storing the executable program of the processor are contained in a computing device, and the computing device is a desktop computer, a notebook computer, a smart phone, a PDA handheld terminal or a tablet computer.
Compared with the prior art, the invention has the following beneficial effects:
the method can quickly, accurately, real-timely and simply control the production bottleneck problem caused by the instability and abnormal conditions of a double-high-speed single-double-line rolling tension adjusting system, prevent the production bottleneck problem in two aspects, on one hand, the steel piling can be caused because the loop cannot be adjusted, on the other hand, the severe fluctuation of the speed of a finishing mill can be caused in the adjusting process of the high-frequency large slope of the loop, the spinning disorder can be caused, and the quality of finished products and disk shapes can be influenced.
Drawings
FIG. 1 is a control schematic diagram of embodiment 1;
fig. 2 is a configuration diagram of a control system of embodiment 1.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples, but the scope of the present invention is not limited thereto.
Example 1:
the invention provides a control method of a tension adjusting system for double-high-wire single-double-wire rolling, which comprises the following steps:
s1, acquiring tension data of the double-line steel passing at the normal rhythm of the double-line steel passing line; the time interval for acquiring the tension data of the double-wire steel passing at the normal rhythm of the double-high wire is t1, the time interval for acquiring the tension data of the steel passing when the double-high wire is switched between the single wire and the double wire in real time in the step S2 is t2, t1 is t2, and t1 is 50 milliseconds;
s2, acquiring steel passing tension data in real time when the double-wire lines are switched between single and double wires;
s3, when the steel passing tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the steel passing tension data when the double line and the single line of the double line are switched with each other, the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other and the steel passing tension data when the normal rhythm and the double line of the double line are switched with each other is calculated, and the tension between the 12 th rolling mill and the 13 th rolling mill in the double line is adjusted according to the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other, wherein:
if the currently acquired steel passing tension data when the single and double wires of the double-high line are switched with each other is compared with the steel passing tension data when the double lines of the high line are in the normal rhythm and the double wires of the high line are switched with each other, and the difference between the steel passing tension data when the single and double wires of the high line are switched with each other and the steel passing tension data when the double lines of the high line are in the normal rhythm and the double wires of the high line is greater than 0, the tension between a 12 th rolling mill and a 13 th rolling mill in the high line is gradually decreased and adjusted by taking 0.1-1% as a base number until the steel passing tension when the single and double wires of the high line are switched with each other is stable, namely the difference between the steel passing tension data when the single and double wires of the high line are switched with each other and the steel passing tension data when the double lines of the high line are in the normal rhythm and the double wires of the high line is 0;
if the currently acquired steel passing tension data when the single-line and double-line of the double-altitude line are switched with each other is compared with the steel passing tension data when the double-altitude line is in the normal rhythm and double-line of the double-altitude line, and the difference between the steel passing tension data when the single-line and double-line of the double-altitude line are switched with each other and the steel passing tension data when the double-altitude line is in the normal rhythm and double-line of the double-altitude line is less than 0, the tension between a 12 th rolling mill and a 13 th rolling mill in the double-altitude line is incrementally adjusted by taking 0.1-1% as a base number until the steel passing tension when the single-line and double-line of the double-altitude line are switched with each other is stable, namely the difference between the steel passing tension data when the single-line and double-line of the double-altitude line are switched with each other and the steel passing tension data when the double-line of the double-altitude line is normal rhythm and double-line is 0;
if the currently acquired steel passing tension data when the single-line and double-line of the double-high line are switched with each other is compared with the steel passing tension data when the double-line and double-line of the double-high line are in normal rhythm and double-line of the double-high line are switched with each other, the difference value between the steel passing tension data when the single-line and double-line of the double-high line are switched with each other and the steel passing tension data when the double-line and double-line of the double-high line are in normal rhythm and double-line of the double-high line is calculated to be 0, the tension between a 12 th rolling mill and a 13 th rolling mill in the double-high line is kept unchanged, the steel passing tension when the single-line and double-line of the double-high line are switched with each other is kept stable, namely, the difference value between the steel passing tension data when the single-line and double-line of the double-high line are switched with each other and the steel passing tension data when the double line and the normal rhythm and double-line of the double-line are kept to be 0.
The invention also provides a control system for the tension adjusting system for the double-high-wire single-double-wire rolling, which comprises a tension detector and a medium rolling control adjusting platform connected with the tension detector, wherein the medium rolling control adjusting platform comprises a tension collecting unit, a tension comparing unit and a tension adjusting unit between the 12 th rolling mill and the 13 th rolling mill;
the tension detector is used for detecting the steel passing tension data when the single line and the double line of the double-altitude line are switched with each other;
the tension acquisition unit is used for acquiring the steel passing tension data detected by the tension detector when the double-high-wire single-wire and double-wire are switched with each other;
the tension comparison unit is used for comparing the steel passing tension data acquired in real time when the single line and the double lines of the double-altitude line are switched with each other with the steel passing tension data of the double lines of the double-altitude line in normal rhythm, and calculating the difference value between the steel passing tension data acquired when the single line and the double lines of the double-altitude line are switched with each other and the steel passing tension data of the double lines of the double-altitude line in normal rhythm;
and the tension adjusting unit between the 12 th rolling mill and the 13 th rolling mill is used for comparing the currently acquired steel passing tension data when the single-line and double-line are switched with the steel passing tension data of the double-line normal rhythm double-line, calculating the difference value between the steel passing tension data when the single-line and double-line steel passing tension adjusting the tension between the 12 th rolling mill and the 13 th rolling mill in the double-line according to the difference value between the steel passing tension data when the single-line and double-line double line steel passing tension data.
In addition to the above embodiments, the present invention may have other embodiments. Any basic scheme formed by adopting equivalent replacement or equivalent transformation falls into the protection scope of the claims of the invention.
Claims (6)
1. A control method of a tension adjusting system for double-high-wire single-double-wire rolling is characterized by comprising the following steps:
s1, acquiring tension data of the double-line steel passing at the normal rhythm of the double-line steel passing line;
s2, acquiring steel passing tension data in real time when the double-wire lines are switched between single and double wires;
s3, comparing the steel passing tension data acquired in real time when the single line and the double lines of the double-high line are switched with each other with the steel passing tension data of the double lines of the double-high line at normal rhythm, calculating the difference value between the steel passing tension data acquired when the single line and the double lines of the double lines are switched with each other and the steel passing tension data of the double lines at normal rhythm, and adjusting the tension between two adjacent rolling mills in the double lines according to the difference value between the steel passing tension data acquired when the single line and the double lines of the double lines are switched with each other and the steel passing tension data of the double lines at normal rhythm;
if the steel passing tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the steel passing tension data when the double line and the double line of the double line are in normal rhythm, and the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other is calculated to be more than 0, the tension between two adjacent rolling mills in the double line is gradually decreased and adjusted by taking 0.1-1% as a base number until the steel passing tension when the single line and the double line of the double line are switched with each other is stable, namely the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other is = 0;
if the steel passing tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the steel passing tension data when the double line and the single line and the double line of the double line are in normal rhythm, and the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other is calculated to be less than 0, the tension between two adjacent rolling mills in the double line is incrementally adjusted by taking 0.1-1% as a base number until the steel passing tension when the single line and the double line of the double line are switched with each other is stable, namely the difference value between the steel passing tension data when the single line and the double line of the double line are switched with each other is = 0;
if the passing steel tension data when the single line and the double line of the double-high line are switched with each other is collected in real time and compared with the passing steel tension data when the double line and the single line and the double line are switched with each other at normal rhythm, and the difference =0 between the passing steel tension data when the single line and the double line of the double line are switched with each other is calculated, the tension between two adjacent rolling mills in the double line is kept unchanged, the passing steel tension when the single line and the double line of the double line are switched with each other is kept stable, namely the difference =0 between the passing steel tension data when the single line and the double line of the double line are switched with each other is kept.
2. The control method of the tension adjusting system for the double-high-wire single-double-wire rolling of claim 1, wherein: the time interval for acquiring the tension data of the double-wire steel passing at the normal rhythm of the double-wire high-speed wire in the step S1 is t1, and the time interval for acquiring the tension data of the steel passing when the double-wire steel passing at the normal rhythm of the double-wire high-speed wire is switched in real time in the step S2 is t2, t1= t2, and t1=50 milliseconds.
3. The control method of the tension adjusting system for the single-wire and double-wire rolling of the double-wire line as claimed in claim 1, wherein the step S3 of adjusting the tension between two adjacent rolling mills in the double-wire line is specifically as follows: and along the conveying direction of the steel wire, the tension between two adjacent rolling mills in the double-height line is the dynamic push-pull relation between the free moment when the former rolling mill passes through the steel and the free moment when the latter rolling mill passes through the steel, and the tension between two adjacent rolling mills in the double-height line is adjusted by adjusting the dynamic push-pull relation between the free moment when the former rolling mill passes through the steel and the free moment when the latter rolling mill passes through the steel.
4. A control system for use in the control method of claim 1, characterized in that: the tension control and adjustment device comprises a tension detector and a middle rolling control and adjustment platform connected with the tension detector, wherein the middle rolling control and adjustment platform comprises a tension acquisition unit, a tension comparison unit and a tension adjustment unit between a previous rolling mill and a next rolling mill;
the tension detector is used for detecting the steel passing tension data when the single line and the double line of the double-altitude line are switched with each other;
the tension acquisition unit is used for acquiring the steel passing tension data detected by the tension detector when the double-high-wire single-wire and double-wire are switched with each other;
the tension comparison unit is used for comparing the steel passing tension data acquired in real time when the single line and the double lines of the double-altitude line are switched with each other with the steel passing tension data of the double lines of the double-altitude line in normal rhythm, and calculating the difference value between the steel passing tension data acquired when the single line and the double lines of the double-altitude line are switched with each other and the steel passing tension data of the double lines of the double-altitude line in normal rhythm;
and the tension adjusting unit between the previous rolling mill and the next rolling mill is used for adjusting the tension between the previous rolling mill and the next rolling mill in the double-high-speed wire according to the difference value of the steel passing tension data when the single-line and double-line of the double-high-speed wire are switched with each other and the steel passing tension data of the double-high-speed wire in normal rhythm.
5. The control system of claim 4, wherein: the tension detector comprises a current transformer and voltage transformer detector and a free torque analog quantity signal receiving module, the current transformer and voltage transformer detector identifies a free torque combined signal on site through real-time monitoring and acquisition on site, and the free torque analog quantity signal is transmitted to the free torque analog quantity signal receiving module through a shielded cable.
6. The control system of claim 4, wherein: data collected by a tension detector, a tension collecting unit, a tension comparing unit and a tension adjusting unit between a previous rolling mill and a next rolling mill in the control system are stored in a storage medium, a plurality of instructions are stored, the instructions are loaded and executed by a processor, and the processor executes a program stored in the storage medium.
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