CN114453453B - Method for judging slip of mandrel in coiled strip steel - Google Patents
Method for judging slip of mandrel in coiled strip steel Download PDFInfo
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- CN114453453B CN114453453B CN202210030058.5A CN202210030058A CN114453453B CN 114453453 B CN114453453 B CN 114453453B CN 202210030058 A CN202210030058 A CN 202210030058A CN 114453453 B CN114453453 B CN 114453453B
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- mandrel
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- preset condition
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- strip steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 16
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
Abstract
The application relates to the technical field of steel rolling, in particular to a method for judging slip of a mandrel in coiled strip steel, which comprises the following steps: when the mandrel is in a first preset condition, obtaining a steel biting signal; taking the time t0 of the steel biting signal as a first starting time, taking t1 as a first stopping time, and detecting a first real-time speed V1 of the mandrel at the first stopping time t 1; detecting a plurality of second real-time speeds V2 of the mandrel during a second starting time t1 to a second ending time t2 by taking the first stopping time t1 as a second starting time and t2 as a second ending time; if V1 and any one V2 meet a second preset condition, judging that the mandrel slips, wherein the second preset condition comprises: V2-V1 is more than or equal to 0.5m/s. And according to the comparison of the two speeds of the mandrel, obtaining the speed deviation, judging the slipping of the mandrel, and finding the slipping phenomenon of the mandrel in advance so as to avoid slipping.
Description
Technical Field
The application relates to the technical field of steel rolling, in particular to a method for judging slip of a mandrel in coiled strip steel.
Background
In the coiling process, when the calibration deviation of the auxiliary roller is large, the arc plate of the auxiliary roller is seriously worn, or the precision of the auxiliary roller does not meet the standard frame quantity and is poor, the gap between the mandrel and the auxiliary roller is large after the mandrel enters the auxiliary roller, the mandrel can slip, and the steel stacking accident can occur in serious cases. By judging the slipping condition of the mandrel, setting up an alarm program, judging whether slipping occurs in advance when the slip sign is found, and making a next treatment scheme according to the slipping condition, thereby avoiding steel stacking accidents when the slipping is serious.
Disclosure of Invention
The application provides a method for judging slip of a mandrel in coiled strip steel, which aims at solving the technical problem of judging slip of the mandrel.
In a first aspect, the present application provides a method for determining slip of a mandrel in coiling strip steel, the method comprising the steps of:
when the mandrel is in a first preset condition, obtaining a steel biting signal;
taking the time t0 of the steel biting signal as a first starting time, taking t1 as a first stopping time, and detecting a first real-time speed V1 of the mandrel at the first stopping time t 1;
detecting a plurality of second real-time speeds V2 of the mandrel during a second starting time t1 to a second ending time t2 by taking the first stopping time t1 as a second starting time and t2 as a second ending time;
if V1 and any one V2 meet the second preset condition, judging that the mandrel slips,
wherein the second preset condition includes: V2-V1 is more than or equal to 0.5m/s.
Optionally, the second preset condition includes: V2-V1 is more than or equal to 0.8m/s.
Optionally, the first stopping time t1 ranges from 0s to 88s, and the second stopping time ranges from 0s to 5s.
Optionally, the first preset condition includes:
the real-time number of turns of the strip steel in the mandrel is more than or equal to 4 turns or the real-time torque of the mandrel is more than 15 kN.m.
Optionally, the real-time number of turns of the strip steel in the mandrel is more than or equal to 6 turns or the real-time torque of the mandrel is more than 20 kN.m.
Optionally, before the mandrel is in the first preset condition, the method further includes: the distance L1 of the wrapper roller to accommodate the strip in the operating position is such that: l1=h+a1, wherein h is the thickness of the strip steel, the unit is mm, a1 is a constant, and the value of a1 is 0-1.5mm.
Optionally, the pressure range of the auxiliary winding roller in the working position is 20-50N.
Optionally, when the mandrel is in the first preset condition, the method further includes: the distance L2 for accommodating the strip steel in the working position of the pinch roll is as follows: l2=h+a2, wherein h is the thickness of the strip steel, the unit is mm, a2 is a constant, and the value of a2 is 0.1-0.5mm.
Optionally, the pressure range of the pinch roll in the working position is 10-100N.
Optionally, the diameter of the mandrel is less than or equal to 762mm, and the torque of the mandrel is less than or equal to 200 kN.m.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the method provided by the embodiment of the application, the first real-time speed V1 of the mandrel at the first time point t1 is used; and a plurality of second real-time speeds V2 in a second time point t2 are used for obtaining speed deviation according to comparison of two speeds of the mandrel, judging the slipping of the mandrel and finding the slipping phenomenon of the mandrel in advance, so that slipping is avoided, serious steel stacking accidents are caused, and the stability of a coiling area is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a method for judging slip of a mandrel in coiling strip steel according to an embodiment of the present application;
fig. 2 is a schematic diagram of a winding process provided by an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The application provides a method for judging the slip of a mandrel in coiling strip steel, as shown in fig. 1, comprising the following steps:
s1, when a mandrel is in a first preset condition, obtaining a steel biting signal;
in this embodiment of the present application, after the steel biting signal is sent, the mandrel is kept at an expansion position, the mandrel enters a secondary expansion, the pinch roll enters a working position, and pressure control is started to be performed.
S2, taking the time t0 of the steel biting signal as a first starting time, taking t1 as a first stopping time, and detecting a first real-time speed V1 of the mandrel at the first stopping time t 1;
s3, taking the first stopping time t1 as a second starting time and t2 as a second ending time, and detecting a plurality of second real-time speeds V2 of the mandrel during the second starting time t1 to the second ending time t 2;
s4, if V1 and any one V2 meet a second preset condition, judging that the mandrel slips,
wherein the second preset condition includes: V2-V1 is more than or equal to 0.5m/s.
In the embodiment of the present application, the first ending time, the second ending time, and the first ending time are only for naming the distinction, and are not generally understood to include the action of stopping or pausing, but are understood to be nouns. The strip steel is coiled and overlapped in an accommodating space formed by the auxiliary winding roller and the mandrel; the number of turns is calculated after the head of the strip steel passes through any one of the auxiliary winding rollers, 1 turn is calculated each time the head of the strip steel reaches the same auxiliary winding roller, the number of the auxiliary winding rollers is at least 3, the number of the auxiliary winding rollers can be multiple, and the number of turns can be calculated each time the head of the strip steel reaches any one of the auxiliary winding rollers. The torque of the mandrel is changed along with the change of the working state of the mandrel, and the working state of the mandrel comprises: a pre-expansion position, an expansion position and a coil unloading position; the mandrel is in the expanded position with a gradual increase in diameter.
As an optional embodiment, the first preset condition includes: the real-time number of turns of the strip steel in the mandrel is more than or equal to 4 turns or the real-time torque of the mandrel is more than 15 kN.m.
In the embodiment of the application, when the number of turns is more than or equal to 4, the reason for sending out the steel biting signal is that the number of turns has the beneficial effect of effectively avoiding error signals; the torque of the mandrel is more than 15 kN.m, and the reason for sending out the biting steel signal is that the torque has the beneficial effect of effectively avoiding error signals.
As an alternative embodiment, the first stopping time t1 ranges from 0 to 8s, and the second stopping time ranges from 0 to 5s.
In the embodiment of the application, the reason for controlling the time of 0s to be less than or equal to t1 and less than 0.88s is that the time is judged by a curve and the beneficial effect of eliminating error signals is achieved; the reason why 0s < t2 < 5s is controlled is that this time is the beneficial effect of eliminating false signals judged by the curve.
In the embodiment of the application, the real-time turns are obtained from the times that the head of the strip steel reaches the auxiliary winding roller, when the head of the strip steel reaches the auxiliary winding roller, the auxiliary winding roller starts to execute pressure control, the mandrel is in an expansion position, the auxiliary winding roller is in a working position, and the pressure control can be executed in the working position; before the head of the strip steel reaches the wrapper roller, the method comprises the following steps: the head of the strip steel reaches the pinch roll, the mandrel is in a pre-expansion position, and the auxiliary roll is in a waiting position.
As an optional embodiment, the second preset condition includes: V2-V1 is more than or equal to 0.8m/s.
As an alternative embodiment, the first stopping time t1 ranges from 0 to 8s, and the second stopping time ranges from 0 to 5s.
As an optional embodiment, the first preset condition includes:
the real-time number of turns of the strip steel in the mandrel is more than or equal to 4 turns or the real-time torque of the mandrel is more than 15 kN.m.
In the embodiment of the application, the real-time number of turns of the strip steel in the mandrel is more than or equal to 4, the number of turns can bite the reason of the steel signal, the real-time torque of the mandrel is more than 15 kN.m, the reason of the steel signal can bite the torque, and the beneficial effect of effectively avoiding the error signal is achieved.
As an alternative implementation mode, the real-time number of turns of the strip steel in the mandrel is more than or equal to 6 turns or the real-time torque of the mandrel is more than 20 kN.m.
In the embodiment of the application, the real-time turns are obtained by the times that the head of the strip steel reaches the auxiliary winding roller.
As an alternative embodiment, the method further comprises, when the mandrel is in the first preset condition: the distance L1 of the wrapper roller to accommodate the strip in the operating position is such that: l1=h+a1, wherein h is the thickness of the strip steel, the unit is mm, a1 is a constant, and the value of a1 is 0-1.5mm.
As an alternative embodiment, the pressure of the auxiliary roller in the working position is in the range of 20-50N.
As an alternative embodiment, the method further comprises, when the mandrel is in the first preset condition: the distance L2 for accommodating the strip steel in the working position of the pinch roll is as follows: l2=h+a2, wherein h is the thickness of the strip steel, the unit is mm, a2 is a constant, and the value of a2 is 0.1-0.5mm.
As an alternative embodiment, the pinch rolls have a pressure in the range of 80-100N in the operative position.
In this embodiment of the present application, the pressure of the wrapper roller may be 40N, 45N, or the like.
As an alternative embodiment, the diameter of the mandrel is less than or equal to 762mm, and the torque of the mandrel is less than or equal to 200 kN.m.
In the embodiment of the application, the diameter of the mandrel at the pre-expansion position is 745mm, the mandrel starts to execute secondary expansion after the mandrel bites a steel signal, the pinch roll starts to execute pressure control, the diameter of the mandrel starts to expand from 745mm to 762mm at most after the secondary expansion of the mandrel, and the diameter of the mandrel at the coil unloading position is 727mm.
The method of the present invention will be described in detail with reference to examples, comparative examples and experimental data.
Example 1
A method for judging slip of a mandrel in coiling strip steel, the device for coiling strip steel is shown in fig. 2, and comprises the following steps: the pinch roll 1, the mandrel 2, the auxiliary roll 3 and the strip steel 4; when the head of the strip steel 4 reaches the pinch roll 1, the mandrel 2 is in a pre-expansion position, and the auxiliary roll 3 and the pinch roll 1 are in waiting positions; the auxiliary winding rollers 3 comprise No. 1, no. 2 and No. 3 auxiliary winding rollers; when the heads of the strip steel 4 respectively reach the number 1, the number 2 and the number 3 wrapper rolls, the 3 wrapper rolls 3 respectively start to execute pressure control, and the pressure value is 48N; the head of the strip steel 4 starts to calculate the number of turns after passing through the No. 1 auxiliary winding roller, 1 turn is obtained when the head of the strip steel reaches the No. 1 pinch roller 1, and when the number of turns is calculated to reach 4 turns of the mandrel 2 or the mandrel torque is more than 15knm, a steel biting signal can be generated by the mandrel 2; after the mandrel biting steel signal is generated, the PLC receives the signal and instructs the mandrel 2 to start executing secondary expansion (diameter is increased, the mandrel 2 is still in an expansion position), and the pinch roll 1 starts executing pressure control; the mandrel 2 is expanded for the second time, namely the mandrel 2 is expanded from 745mm to 762mm at most; after the mandrel 2 generates a steel biting signal, 0-0.8S, recording the real-time speed V1 of the mandrel 2 as a judging point; calculating from the speed judgment point of the recording mandrel 2, and obtaining a plurality of real-time speeds V2 of the mandrel 2 in 5S, wherein if the relation between any one V2 and V1 meets the following conditions: and when V2-V1 is more than or equal to 0.8m/s, judging the slip of the mandrel, and triggering the slip alarm of the mandrel.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method of determining slip of a mandrel in coiling strip steel, the method comprising the steps of:
when the mandrel is in a first preset condition, obtaining a steel biting signal;
taking the time t0 of the steel biting signal as a first starting time, taking t1 as a first stopping time, and detecting a first real-time speed V1 of the mandrel at the first stopping time t 1;
detecting a plurality of second real-time speeds V2 of the mandrel during a second starting time t1 to a second ending time t2 by taking the first stopping time t1 as a second starting time and t2 as a second ending time;
if V1 and any one V2 meet the second preset condition, judging that the mandrel slips,
wherein the first preset condition includes:
the real-time number of turns of the strip steel in the mandrel is more than or equal to 4 turns or the real-time torque of the mandrel is more than 15 kN.m;
the second preset condition includes: V2-V1 is more than or equal to 0.5m/s.
2. The method of claim 1, wherein the second preset condition comprises: V2-V1 ≡
0.8m/s。
3. The method of claim 1, wherein the first expiration time t1 ranges from 0 to 0.88s and the second expiration time ranges from 0 to 5s.
4. The method of claim 1, wherein the first preset condition comprises: the real-time number of turns of the strip steel in the mandrel is more than or equal to 6 turns or the real-time torque of the mandrel is more than 20 kN.m.
5. The method of claim 1, wherein the method further comprises, when the mandrel is in the first preset condition: the distance L1 of the wrapper roller to accommodate the strip in the operating position is such that: l1=h+a1, wherein h is the thickness of the strip steel, the unit is mm, a1 is a constant, and the value of a1 is 0-1.5mm.
6. The method of claim 5, wherein the pressure of the wrapper in the working position is in the range of 20-50N.
7. The method of claim 1, wherein the method further comprises, when the mandrel is in the first preset condition: the distance L2 of the pinch rolls to accommodate the strip in the operating position is such that: l2=h+a2, wherein h is the thickness of the strip steel, the unit is mm, a2 is a constant, and the value of a2 is 0.1-0.5mm.
8. The method of claim 7, wherein the pinch roll has a pressure in the range of 10-100N in the operative position.
9. The method of claim 1, wherein the mandrel has a diameter of 762mm or less and a torque of 200 kN-m or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030058.5A CN114453453B (en) | 2022-01-12 | 2022-01-12 | Method for judging slip of mandrel in coiled strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030058.5A CN114453453B (en) | 2022-01-12 | 2022-01-12 | Method for judging slip of mandrel in coiled strip steel |
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| Publication Number | Publication Date |
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| CN114453453A CN114453453A (en) | 2022-05-10 |
| CN114453453B true CN114453453B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210030058.5A Active CN114453453B (en) | 2022-01-12 | 2022-01-12 | Method for judging slip of mandrel in coiled strip steel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0422511A (en) * | 1990-05-17 | 1992-01-27 | Kawasaki Steel Corp | Method and device for detecting slip between strip and mandrel on hot rolling winding device |
| JPH08309434A (en) * | 1995-05-16 | 1996-11-26 | Nippon Steel Corp | Coiling method for strip in coiling equipment |
| CN102284557A (en) * | 2011-06-08 | 2011-12-21 | 山西太钢不锈钢股份有限公司 | Dynamic judgment method for precision abnormity of winding drum of winding machine |
| CN102615143A (en) * | 2012-03-15 | 2012-08-01 | 山西太钢不锈钢股份有限公司 | Method for dynamically judging precision exception of winding drum of reeling machine |
| CN106216432A (en) * | 2016-07-26 | 2016-12-14 | 山西太钢不锈钢股份有限公司 | A kind of method solving hot rolling reeling heavy gauge steel strip reel skidding heap steel |
-
2022
- 2022-01-12 CN CN202210030058.5A patent/CN114453453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0422511A (en) * | 1990-05-17 | 1992-01-27 | Kawasaki Steel Corp | Method and device for detecting slip between strip and mandrel on hot rolling winding device |
| JPH08309434A (en) * | 1995-05-16 | 1996-11-26 | Nippon Steel Corp | Coiling method for strip in coiling equipment |
| CN102284557A (en) * | 2011-06-08 | 2011-12-21 | 山西太钢不锈钢股份有限公司 | Dynamic judgment method for precision abnormity of winding drum of winding machine |
| CN102615143A (en) * | 2012-03-15 | 2012-08-01 | 山西太钢不锈钢股份有限公司 | Method for dynamically judging precision exception of winding drum of reeling machine |
| CN106216432A (en) * | 2016-07-26 | 2016-12-14 | 山西太钢不锈钢股份有限公司 | A kind of method solving hot rolling reeling heavy gauge steel strip reel skidding heap steel |
Non-Patent Citations (1)
| Title |
|---|
| 热轧卷取机打滑问题分析及对策;王维;;冶金能源(01);全文 * |
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