CN111744958B - Method for adjusting tail-fixing angle of coil box - Google Patents
Method for adjusting tail-fixing angle of coil box Download PDFInfo
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- CN111744958B CN111744958B CN202010508673.3A CN202010508673A CN111744958B CN 111744958 B CN111744958 B CN 111744958B CN 202010508673 A CN202010508673 A CN 202010508673A CN 111744958 B CN111744958 B CN 111744958B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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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
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0064—Uncoiling the rolled product
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Abstract
The invention relates to a method for adjusting the tail-fixing angle of a coil box, and belongs to the technical field of hot rolling. The technical scheme of the invention is as follows: detecting the positive appearance of the side edge of the steel coil by an infrared camera, and identifying the appearance of the steel coil by a system
When the steel coil is rotated in the negative direction, the No. 1 cradle roller drives the steel coil to rotate for a certain arc length; after the No. 1 cradle roll is completely adjusted, the infrared camera redetects the forward morphology of the side edge of the steel coil, and the adjusted final angle value is calculated again through pattern fitting
Ensuring the tail-positioning angle of the steel coil after adjustment
Within the range, the steel coil can be ensured to be normally uncoiled. The invention has the beneficial effects that: through deciding the tail angle to coil of strip case coil of strip and carrying out automatic correction, can effectually avoid deciding that the tail angle is too high or cross the risk of opening a book of bringing excessively, ensure that coil of strip case coil of strip is opened a book the chronogenesis and is gone on smoothly, effectively promoted coil of strip case operation's stability, realized the promotion of production line automation level and production efficiency.
Description
Technical Field
The invention relates to a method for adjusting the tail-fixing angle of a coil box, and belongs to the technical field of hot rolling.
Background
Coil boxes are a common piece of equipment in hot continuous rolling plants. The intermediate blank is fed into a finishing mill through the processes of coiling and uncoiling by a coil box, and the coil box has good effects on reducing the transverse temperature difference between the head and the tail of the intermediate blank, removing the surface oxide scale and the like. The method comprises the steps that firstly, an intermediate blank needs to undergo coiling and uncoiling processes in the process of passing through a coil box, tail fixing is the last link of a coiling time sequence of the coil box, tail length is calculated through tracking, tail fixing control is achieved through the accumulated integral of roller speed, and the tail of a steel coil needs to be stopped within a certain height range after tail fixing so as to guarantee smooth proceeding of a subsequent uncoiling time sequence. However, due to the influence of the material tracking precision of the intermediate blank and the function precision of equipment, the tail fixing accuracy and consistency of the coiled sheet box have various uncertainties in a field environment, and when the tail fixing is higher, the head of the intermediate blank is warped after uncoiling; when the fixed tail is lower, the head of the intermediate billet can be knocked after uncoiling, the two problems can cause the head of the intermediate billet to scratch and rub with a roller way or other equipment in the uncoiling process to cause uncoiling failure, and scrap steel can be caused in serious cases.
When the tail fixing is abnormal in the production process, the tail fixing angle can be adjusted through a tail fixing compensation value, and the principle is that the final tail fixing angle is adjusted by correcting the length change of the tail tracking distance. However, the regulation has some limit problems, such as the lag of the regulation and the timeliness and accuracy of the observation of the abnormal problems in the field. Therefore, how to realize the automatic regulation and control of abnormal tail fixing is significant for improving the labor efficiency and the production stability.
Disclosure of Invention
The invention aims to provide a method for adjusting the tail-fixing angle of a coil boxPractice ofThen with thetaTargetComparing the values to determine thetaPractice of-θTargetWhether or not the value satisfies [ -15 °, +15 ° ]]When the requirement is met, when the requirement is exceeded, the coil of strip case 1# cradle roller carries out corresponding rotation and adjusts the fixed tail, realize the coil of strip case and decide the automatic control of tail closed loop, decide the tail angle to coil of strip case coil of strip and carry out automatic correction, can effectually avoid deciding that the tail angle is too high or cross the risk of opening a book of bringing excessively, ensure that the coil of strip case is opened a book the coil of strip chronogenesis and is gone on smoothly, the stability of coil of strip case operation has effectively been promoted, the promotion of production line automation level and production efficiency has been realized, the above-mentioned problem that exists among the background art has been solved effectively.
The technical scheme of the invention is as follows: a tail-positioning angle adjusting method for a coil box comprises the following steps:
step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of；
Step 3, the system calculates whether delta theta meets the angle of [ -15 degrees and +15 degrees]Where δ θ ═ θPractice of-θTarget. When the delta theta value meets the requirement, the coil box executes an uncoiling time sequence;
step 4, if the value of delta theta does not meet the requirement, when the value of delta theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate forward for a certain arc length; when delta theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction for a certain arc length;
step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fittingAdjustment of；
Step 6, the system calculates whether the adjusted delta theta value meets the conditions of minus 15 degrees and plus 15 degrees again]When the difference is equal to delta thetaAdjustment of-θTarget(ii) a When the delta theta does not meet the requirement, carrying out corresponding adjustment again;
and 7, finally, when the delta theta meets the requirements of [ -15 degrees, +15 degrees ], the coil box executes an uncoiling sequence.
The infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.
Theta is describedPractice ofThe angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.
The target tail-fixing angle value thetaTarget＝135°。
The 1# cradle roller has a speed upsilon of +0.5m/s when rotating in the positive direction and has a speed upsilon of-0.5 m/s when rotating in the negative direction
The central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | thetaPractice of-θTarget|。
The angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.
And d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.
The invention has the beneficial effects that: detecting the forward morphology of the side edge of the steel coil at the end of the tail by using an infrared camera, and calculating the actual tail-fixing angle value theta by means of graph fittingPractice ofThen with thetaTargetComparing the values to determine thetaPractice of-θTargetWhether or not the value satisfies [ -15 °, +15 ° ]]When the requirement is met, when the requirement is exceeded, the cradle roller of the coil box No. 1 is correspondingly rotated to adjust the fixed tail, the automatic control of the closed loop of the fixed tail of the coil box is realized, the tail angle of the coil box steel is automatically corrected, the uncoiling risk caused by overhigh or overlow tail angle can be effectively avoided, the coil box uncoiling time sequence is ensured to be smoothly carried out, the stability of the operation of the coil box is effectively improved, and the improvement of the production line automation level and the production efficiency is realized.
Drawings
FIG. 1 is a schematic view of a roll of the present invention;
FIG. 2 is a flow chart of a control method of the present invention;
in the figure: CR1 is a No. 1 cradle roll, BR is a bending roll, FR is a forming roll, thetaTargetAnd the final target angle value is obtained.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A tail-positioning angle adjusting method for a coil box comprises the following steps:
step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of；
Step 3, the system calculates whether delta theta meets the angle of [ -15 degrees and +15 degrees]Where δ θ ═ θPractice of-θTarget. When the delta theta value meets the requirement, the coil box executes an uncoiling time sequence;
step 4, if the value of delta theta does not meet the requirement, when the value of delta theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate forward for a certain arc length; when delta theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction for a certain arc length;
step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fittingAdjustment of；
Step 6, the system calculates whether the adjusted delta theta value meets the conditions of minus 15 degrees and plus 15 degrees again]When the difference is equal to delta thetaAdjustment of-θTarget(ii) a When the delta theta does not meet the requirement, carrying out corresponding adjustment again;
and 7, finally, when the delta theta meets the requirements of [ -15 degrees, +15 degrees ], the coil box executes an uncoiling sequence.
The infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.
Theta is describedPractice ofThe angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.
The target tail-fixing angle value thetaTarget＝135°。
The 1# cradle roller has a speed upsilon of +0.5m/s when rotating in the positive direction and has a speed upsilon of-0.5 m/s when rotating in the negative direction
The central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | thetaPractice of-θTarget|。
The angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.
And d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.
In order to more clearly understand the content of the invention, the process of coiling the lower coil box is described, firstly, after the head of the intermediate blank enters the bending roller of the coil box, the head of the blank is extruded by the three rollers to generate bending deformation, the bent head and the cambered guard plate of the forming roller generate impact to complete the forming of the innermost ring, then the intermediate blank is driven by the cradle roller 1# and the bending roller to complete the subsequent coiling process, and the tail of the coil box is determined by tracking the tail of the intermediate blank so as to determine the length of the intermediate blank, and then the tail position is determined according to the corresponding speed. Wherein CR1 is No. 1 cradle roll, BR is bending roll, FR is forming roll, thetaTargetAnd the final target angle value is obtained.
Example one
A method for adjusting the tail fixing angle of a coil box comprises the following steps:
1. ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
2. detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of142 ° where θPractice ofThe angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.
3. The system calculates delta theta, and delta theta is equal to thetaPractice of-θTarget7 deg., where θTargetThe tolerance is ± 15 ° with 135 °.
4. At this time, δ θ satisfies the requirements of [ -15 °, +15 ° ].
5. The reel box executes the unwinding sequence.
Example two
A method for adjusting the tail fixing angle of a coil box comprises the following steps:
1. ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
2. detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of160 ° where θPractice ofCorresponding from the top of the cross center line of the steel coil to the top of the tail of the steel coilThe angle of the circle center.
3. The system calculates delta theta, and delta theta is equal to thetaPractice of-θTarget25 deg., where θTargetThe tolerance is ± 15 ° with 135 °.
4. At the moment, when delta theta is more than +15 degrees, the 1# cradle roller needs to drive the steel coil to rotate forwards for a certain arc length l, and the central angle corresponding to the arc length l is theta ═ thetaPractice of-θTarget25 degrees, the current calculated coil diameter is 1550mm, the forward rotation arc length of the steel coil driven by the 1# cradle roller is 337.98mm according to the l-theta pi d/360, and the forward rotation speed of the 1# cradle roller is upsilon +0.5 m/s.
5. After the adjustment is finished, the infrared camera detects the forward morphology of the side edge of the steel coil again, the system identifies the morphology of the steel coil, and the adjusted tail angle value theta is calculated through pattern fittingAdjustment ofAt this time, thetaAdjustment of＝137°，δθ＝|θAdjustment of-θTarget2 deg.. At this time, delta theta satisfies [ -15 DEG, +15 DEG C]The requirements of (1).
6. The reel box executes the unwinding sequence.
EXAMPLE III
A method for adjusting the tail fixing angle of a coil box comprises the following steps:
1. ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
2. detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of90 deg., where θPractice ofThe angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.
3. The system calculates delta theta, and delta theta is equal to thetaPractice of-θTarget-45 °, where θTargetThe tolerance is ± 15 ° with 135 °.
4. When delta theta is less than-15 degrees, the 1# cradle roller needs to drive the steel coil to rotate in the negative direction for a certain arc length l, and the central angle corresponding to the arc length l is theta ═ thetaPractice of-θTargetObtaining the current calculated roll diameter from the system to be 1620mm, calculating the adjusted rotation distance of the 1# cradle roller to be 635.85mm according to the l-theta pi d/360,in this case, the negative rotation speed of the No. 1 cradle roll is upsilon-0.5 m/s.
5. After the adjustment is finished, the infrared camera detects the forward morphology of the side edge of the steel coil again, the system identifies the morphology of the steel coil, and the adjusted tail angle value theta is calculated through pattern fittingAdjustment ofAt this time, thetaAdjustment of＝155°，δθ＝θAdjustment of-θTarget20 deg. is equal to. At this time, delta theta does not satisfy [ -15 DEG, +15 DEG C]And therefore needs to be readjusted.
6. At the moment, when delta theta is more than +15 degrees, the 1# cradle roller needs to drive the steel coil to rotate forwards for a certain arc length l, and the central angle corresponding to the arc length l is theta ═ thetaAdjustment of-θTargetThe currently calculated roll diameter is 1620mm obtained from the system, and the adjusted rotating distance l of the 1# cradle roller is 70.65mm according to l of theta pi d/360, and the rotating forward rotating speed upsilon of the 1# cradle roller is +0.5 m/s.
7. After the adjustment is finished, the infrared camera detects the forward morphology of the side edge of the steel coil again, the system identifies the morphology of the steel coil, and the adjusted tail angle value theta is calculated through pattern fittingAdjustment 1By fitting to obtain θAdjustment 1132 °, in which case δ θ is | θAdjustment 1-θTarget3 DEG satisfies [ -15 DEG, +15 DEG)]The requirements of (1).
8. The reel box executes the unwinding sequence.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein, and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (6)
1. A tail-positioning angle adjusting method for a coil box is characterized by comprising the following steps:
step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;
step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fittingPractice of；
Step 3, the system calculates whether delta theta meets the angle of [ -15 degrees and +15 degrees]Where δ θ ═ θPractice of-θTarget(ii) a When the delta theta value meets the requirement, the coil box executes an uncoiling time sequence;
step 4, if the value of delta theta does not meet the requirement, when the value of delta theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate positively; when delta theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction;
step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fittingAdjustment of；
Step 6, the system calculates whether the adjusted delta theta value meets the requirements of [ -15 degrees, +15 degrees ] again, and at the moment
δθ＝θAdjustment of-θTarget(ii) a When the delta theta does not meet the requirement, carrying out corresponding adjustment again;
step 7, finally, when the delta theta meets the requirements of [ -15 degrees, +15 degrees ], the plate rolling box executes an uncoiling time sequence;
the target tail-fixing angle value thetaTarget135 °; the speed of the No. 1 cradle roller is not less than +0.5m/s when the roller rotates positively, and not less than-0.5 m/s when the roller rotates negatively.
2. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: the infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.
3. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: theta is describedPractice ofThe angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.
4. The coil box tail guide of claim 1The angle adjusting method is characterized in that: the central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | thetaPractice of-θTarget|。
5. The method for adjusting the tail-defining angle of a coil box according to claim 4, wherein: the angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.
6. The method for adjusting the tail-defining angle of a coil box according to claim 5, wherein: and d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000301236A (en) * | 1999-04-16 | 2000-10-31 | Nippon Steel Corp | Method for controlling stop of coiling of steel sheet in coil box |
| CN207271808U (en) * | 2017-09-26 | 2018-04-27 | 山西太钢不锈钢股份有限公司 | A kind of Coil Box forming roller position block |
| CN108817089A (en) * | 2018-04-28 | 2018-11-16 | 江苏省沙钢钢铁研究院有限公司 | Control method for hot rolling thin-specification strip steel coil |
| CN109702019A (en) * | 2018-12-21 | 2019-05-03 | 首钢京唐钢铁联合有限责任公司 | Method for preventing cold rolling and uncoiling difficulty of high-strength steel |
-
2020
- 2020-06-06 CN CN202010508673.3A patent/CN111744958B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000301236A (en) * | 1999-04-16 | 2000-10-31 | Nippon Steel Corp | Method for controlling stop of coiling of steel sheet in coil box |
| CN207271808U (en) * | 2017-09-26 | 2018-04-27 | 山西太钢不锈钢股份有限公司 | A kind of Coil Box forming roller position block |
| CN108817089A (en) * | 2018-04-28 | 2018-11-16 | 江苏省沙钢钢铁研究院有限公司 | Control method for hot rolling thin-specification strip steel coil |
| CN109702019A (en) * | 2018-12-21 | 2019-05-03 | 首钢京唐钢铁联合有限责任公司 | Method for preventing cold rolling and uncoiling difficulty of high-strength steel |
Non-Patent Citations (1)
| Title |
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| 热卷箱控制系统;张志达 王万福;《冶金自动化》;19981031;第10-12页 * |
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