CN107552572A - The method for preventing piling of steel between tandem mill frame - Google Patents
The method for preventing piling of steel between tandem mill frame Download PDFInfo
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- CN107552572A CN107552572A CN201610510476.9A CN201610510476A CN107552572A CN 107552572 A CN107552572 A CN 107552572A CN 201610510476 A CN201610510476 A CN 201610510476A CN 107552572 A CN107552572 A CN 107552572A
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Abstract
The invention discloses a kind of method for preventing piling of steel between tandem mill frame, including upstream stand, downstream frame and frame measurement apparatus, the frame measurement apparatus includes upstream stand measurement apparatus and downstream frame measurement apparatus, wherein, assuming that the distance between the upstream stand and the downstream frame are L, methods described includes：After the upstream stand measurement apparatus, which measures the strip, normally stings steel in upstream stand, the upstream stand measurement apparatus calculates travel distance L1 of the strip in upstream stand, as L1 >=L+L2, if the downstream frame measurement apparatus does not measure the strip and normally stings steel in downstream frame yet, the operation of the tandem mill is then automatically stopped, wherein L2 is the safe distance set.The method provided by the present invention for preventing piling of steel between tandem mill frame can carry out automatic decision and shutdown to the piling of steel accident of tandem mill, by operating personnel because experience, judgement and careless omission to cause the possibility of fault spread to be reduced to minimum.
Description
Technical field
The present invention relates to milling train field, more particularly to a kind of method for preventing piling of steel between tandem mill frame.
Background technology
At present, in tandem mill frame rolled band steel, the working roll of upstream stand bites and rolled band steel, just will before not throwing steel
Strip make a gift to someone downstream frame working roll rolling, i.e., same strip simultaneously rolled in several rolling mills.Produced in tandem mill frame
When, the problem of piling of steel between frame often occurs.Upstream stand bites and rolled band steel, and downstream frame conveys by strip,
Due to strip running deviation, the abnormal conditions such as discount, the skidding of downstream frame are stuck up, cause strip can not smoothly bite downstream frame and cause
Piling of steel between frame.
In original art, it is necessary to which operating personnel judge whether that piling of steel accident, and manual shut-down occurs.When basis is shut down
The experience of operating personnel is manually operated.Prior art has the disadvantage that：1, fully rely on whether artificial judgment occurs piling of steel accident.
On the one hand, because part operation personnel are not wholwe-hearted, some piling of steel accidents tend not to be found in time, cause fault spread.
On the other hand, when there are abnormal conditions, whether this abnormal conditions are exactly that piling of steel accident needs manually to be judged.If sentence
Disconnected error can cause unnecessary stopping accident.In addition, when tandem mill frame is more, possible maloperation stops wrong frame；2, milling train
It must stop manually.After piling of steel accident occurs, heap can be reduced in time by, which shutting down, enters piling of steel amount between frame, wins the piling of steel of preciousness
Processing time.But because the difference of the reflection when participating in the cintest of operating personnel, often judges piling of steel too late, delays downtime.
Learned by exchange and data check, each heat, the Continuous mill train of cold rolling producing line are required to manually after piling of steel generation
Shut down, solve method currently without relatively effective.
Because the piling of steel accident of tandem mill is one of multiple accident of hot rolling line, because its producing cause is complicated, accident
Itself it is difficult thoroughly to prevent, the safety hazards triggered by this class accident exist always.
For the problems of in the prior art, there is provided a kind of method for preventing piling of steel between tandem mill frame has important
Meaning.
The content of the invention
To solve the above problems, the present invention provides a kind of method for preventing piling of steel between tandem mill frame.
To achieve the above object, the of the invention method for preventing piling of steel between tandem mill frame, the tandem mill include upstream
Frame, downstream frame and frame measurement apparatus, the frame measurement apparatus includes upstream stand measurement apparatus and downstream frame is surveyed
Device is measured, wherein, the distance between the upstream stand and the downstream frame are L, and methods described includes：
After the upstream stand measurement apparatus, which measures the strip, normally stings steel in upstream stand, the upstream stand is surveyed
Measure device and calculate travel distance L1 of the strip in upstream stand, as L1 >=L+L2, if the downstream frame measurement apparatus
The strip is not measured yet and normally stings steel in downstream frame, then is automatically stopped the operation of the tandem mill, and wherein L2 is what is set
Safe distance.
Further, the mill speed of the tandem mill is constant, and the tandem mill includes upstream stand, downstream frame and machine
Frame measurement apparatus, the frame measurement apparatus include upstream stand measurement apparatus and downstream frame measurement apparatus, the upstream machine
It is T that the theory of frame and downstream frame, which stings the steel time difference, then methods described includes：
After the upstream stand measurement apparatus, which measures the strip, normally stings steel in upstream stand, the upstream stand is surveyed
Measure device and calculate travel time T1 of the strip in upstream stand, as T1 >=T+T2, if the downstream frame measurement apparatus
The strip is not measured yet and normally stings steel in downstream frame, then is automatically stopped the operation of the tandem mill, and wherein T2 is what is set
Safety time.
Further, the frame measurement apparatus be used for detect frame roll-force, it include pressure-measuring head, measuring cell main frame and
Primary computer, the pressure-measuring head are separately positioned on upstream stand and downstream frame, and the pressure-measuring head detects frame in real time
Roll-force, and surveyed roll-force is sent to measuring cell main frame, surveyed roll-force is passed to one-level and calculated by the measuring cell main frame
Machine, it is described when the roll-force is more than or equal in the primary computer precomputation roll-force of the strip stored
Primary computer judges that the frame normally stings steel.
Further, the frame measurement apparatus also includes motor and speed measuring device, when the primary computer judges institute
Strip is stated when normally stinging steel on upstream stand, rotating speed and the speed measuring device meter of the primary computer by the motor
Calculate travel distance L1 of the strip in upstream stand.
The method provided by the present invention for preventing piling of steel between tandem mill frame the piling of steel accident of tandem mill can be carried out from
It is dynamic to judge and shut down, by operating personnel because experience, judgement and careless omission to cause the possibility of fault spread to be reduced to minimum.
Brief description of the drawings
Fig. 1 is the step flow chart of the method for the invention；
Fig. 2 is the step flow chart for preventing the method for piling of steel between tandem mill frame of constant mill speed of the present invention；
Fig. 3 is the structural representation of tandem mill of the present invention.
Embodiment
Below, it is further described with reference to accompanying drawing, structure and operation principle to the present invention etc..
As shown in Fig. 1, Fig. 2 and Fig. 3, the of the invention method for preventing piling of steel between tandem mill frame includes strip 1, upstream machine
Frame 2, downstream frame 3 and frame measurement apparatus, the frame measurement apparatus includes upstream stand measurement apparatus and downstream frame is surveyed
Device is measured, wherein the closing method includes two kinds of situations altogether：1, the tandem mill of non-constant mill speed；2, constant rolling speed
The tandem mill of degree.Two kinds of situations can be shut down with distance measurement method to realize, and the tandem mill of the constant mill speed
Additionally usage time measuring method it can also be shut down to realize.
The distance measurement method specifically, assume that the distance between the upstream stand 2 and the downstream frame 3 are L,
The distance L is known, then the described method comprises the following steps：Step 1 S1, the upstream stand measurement apparatus measure
The strip normally stings steel in upstream stand 2；
Step 2 S2, the upstream stand measurement apparatus calculate the strip in the travel distance L1 of upstream stand 2, work as institute
L1 >=L+L2 is stated, the downstream frame measurement apparatus does not measure the strip when downstream frame 3 normally stings steel, then stopped automatically yet
The only operation of the tandem mill, wherein L2 are the safe distance set.
In the ideal case, the strip is substantially flat, and the measurement apparatus of upstream stand 2 is measuring the strip upper
Trip frame 2 normally stings the distance L1 that strip walking is soon calculated after steel, when the strip length for calculating upstream stand 2 and shutting out, i.e.,
When the distance L1 of strip walking exceedes the distance L of upstream stand 2 and downstream frame 3, but now the measurement apparatus of downstream frame 3 is not yet
Measure the strip and normally sting steel in downstream frame 3, it is possible to which judging the situation of piling of steel may have occurred and that.But in actual production
In situation, strip is not necessarily substantially flat, and some are slight curving or the strip with nose, camber etc. is last or can
To bite downstream frame 3, piling of steel accident does not occur, therefore, in this case, the travel distance L1 of strip is tended to exceed
Swim the distance between frame 2 and downstream frame 3 L, and finally still successfully sting steel, it would therefore be desirable to increase a safety away from
From L2, the safe distance L2 can carry out artificial adjustment, increase or reduction according to actual conditions, i.e., as L1 >=L+L2,
Continuous mill train is just automatically stopped, can so be reduced not with avoiding causing unnecessary autostop because of strip out-of-flatness
Necessary loss.
The Method Of Time Measurement is right specifically, the steel time difference of stinging for assuming the upstream stand 2 and downstream frame 3 is T
In the tandem mill of constant mill speed, the upstream stand 2 stings the steel time difference to be known and constant with downstream frame 3, then
It the described method comprises the following steps：Step 1 S1 ', the upstream stand measurement apparatus measure the strip in upstream stand 2 just
Often sting steel；Step 2 S2 ', the upstream stand measurement apparatus calculate the strip in the travel time T1 of upstream stand 2, work as institute
T1 >=T+T2 is stated, the measurement apparatus of downstream frame 3 does not measure the strip when downstream frame 3 normally stings steel yet, then automatically
Stop the operation of the tandem mill, wherein T2 is the safety time set.
Normally, after upstream stand 2 stings steel, the upstream stand measurement apparatus is measuring the strip in upstream stand
2 it is normal sting steel after just calculate the travel time T1 that strip goes out after upstream stand 2, when T1 exceedes the upstream stand 2 and downstream machine
When stinging steel time difference T of frame 3, but the downstream frame measurement apparatus does not measure the strip and normally stings steel in downstream frame 3 yet,
It then may determine that the situation of piling of steel has occurred and that, similarly, in actual production process, it is contemplated that the incomplete planarization of strip,
Even if what the travel time T1 exceeded the upstream stand 2 and downstream frame 3 stings steel time difference T, last downstream frame 3 is still
Steel can be successfully stung, therefore, also to increase a safety time T2, i.e., as T1 >=T+T2, just be automatically stopped the tandem mill
Operation.
Force checking device, the frame roll-force detection are rolled as shown in figure 3, the frame measurement apparatus is a kind of frame
Device includes pressure-measuring head 4,5, measuring cell main frame 6 and primary computer 7；, can be according to strip before strip reaches Continuous mill train
Kind and specification etc. precompute roll-force of the strip in each frame, and the precomputation roll-force result are sent to described
Primary computer 7.The upper spider and lower bearing bracket of the Continuous mill train can be provided with pressure-measuring head, the i.e. He of upper spider pressure-measuring head 4 respectively
Lower bearing bracket pressure-measuring head 5, the roll-force of pressure-measuring head frame constantly corresponding to detection, and surveyed roll-force is sent to measuring cell
Surveyed roll-force is passed to primary computer 7 by main frame 6, the measuring cell main frame 6, when the roll-force is more than or equal to described one
During the precomputation roll-force of the strip stored in level computer 7, the primary computer 7 judges that the frame is normally stung
Steel.
The frame measurement apparatus also includes motor and speed measuring device, when the primary computer 7 judges that the strip exists
When steel is normally stung on upstream stand 2, the primary computer 7 calculates strip by the rotating speed of the motor and the speed measuring device
The time walked and distance are bitten after upstream stand 2.
In the preferred embodiment of the invention, there is provided a kind of closing method of tandem mill using constant mill speed,
Known upstream stand and downstream frame it is constant to sting the steel time difference is 3.6S, and the default safety time of staff is 2.4S,
After primary computer judges that upstream stand normally stings steel, i.e., the walking after strip bites upstream stand is calculated by speed measuring device
Time, when walking between when being 6S, the primary computer does not determine the strip and normally stings steel in downstream frame yet, therefore
The operation of the tandem mill is automatically stopped, success is found that piling of steel accident in the very first time, and avoids entering for piling of steel accident
One step is intensification.
More than, it is only schematic description of the invention, it will be recognized by those skilled in the art that in the work without departing from the present invention
On the basis of making principle, a variety of improvement can be made to the present invention, this belongs to protection scope of the present invention.
Claims (4)
- A kind of 1. method for preventing piling of steel between tandem mill frame, it is characterised in that the tandem mill includes upstream stand, downstream machine Frame and frame measurement apparatus, the frame measurement apparatus include upstream stand measurement apparatus and downstream frame measurement apparatus, wherein, The distance between the upstream stand and the downstream frame are L, and methods described includes：After the upstream stand measurement apparatus, which measures the strip, normally stings steel in upstream stand, the upstream stand measurement dress The travel distance L1 for calculating the strip in upstream stand is put, as L1 >=L+L2, if the downstream frame measurement apparatus is not yet Measure the strip and normally sting steel in downstream frame, be then automatically stopped the operation of the tandem mill, wherein L2 is the safety set Distance.
- A kind of 2. method for preventing piling of steel between tandem mill frame, it is characterised in that the mill speed of the tandem mill is constant, described Tandem mill includes upstream stand, downstream frame and frame measurement apparatus, and the frame measurement apparatus includes upstream stand measurement dress Put with downstream frame measurement apparatus, it is T that the theory of the upstream stand and downstream frame, which stings the steel time difference, and methods described includes：After the upstream stand measurement apparatus, which measures the strip, normally stings steel in upstream stand, the upstream stand measurement dress The travel time T1 for calculating the strip in upstream stand is put, as T1 >=T+T2, if the downstream frame measurement apparatus is not yet Measure the strip and normally sting steel in downstream frame, be then automatically stopped the operation of the tandem mill, wherein T2 is the safety set Time.
- 3. the method for piling of steel between tandem mill frame is prevented as claimed in claim 1, it is characterised in that the frame measurement apparatus For detecting frame roll-force, it includes pressure-measuring head, measuring cell main frame and primary computer, and the pressure-measuring head is separately positioned on Swim in frame and downstream frame, the pressure-measuring head detects the roll-force of frame in real time, and surveyed roll-force is sent into measuring cell Main frame, surveyed roll-force is passed to primary computer by the measuring cell main frame, when the roll-force is more than or equal to the one-level During the precomputation roll-force of the strip stored in computer, the primary computer judges that the frame normally stings steel.
- 4. the method for piling of steel between tandem mill frame is prevented as claimed in claim 3, it is characterised in that the frame measurement apparatus Also include motor and speed measuring device, it is described when the primary computer judges that the strip is normally stinging steel on upstream stand Primary computer calculates travel distance L1 of the strip in upstream stand by the rotating speed of the motor and the speed measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610510476.9A CN107552572A (en) | 2016-06-30 | 2016-06-30 | The method for preventing piling of steel between tandem mill frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610510476.9A CN107552572A (en) | 2016-06-30 | 2016-06-30 | The method for preventing piling of steel between tandem mill frame |
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| CN107552572A true CN107552572A (en) | 2018-01-09 |
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| CN201610510476.9A Pending CN107552572A (en) | 2016-06-30 | 2016-06-30 | The method for preventing piling of steel between tandem mill frame |
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Cited By (2)
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| CN110090867A (en) * | 2019-05-14 | 2019-08-06 | 北京科技大学设计研究院有限公司 | A method of piling of steel between edger roll and plain-barreled roll when plain-barreled roll being prevented to sting steel |
| CN110355212A (en) * | 2018-03-26 | 2019-10-22 | 宝山钢铁股份有限公司 | A kind of milling train automatic stop arrangement, control system and control method |
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| JP2004148386A (en) * | 2002-10-31 | 2004-05-27 | Kobe Steel Ltd | Aluminum alloy plate having excellent scratch resistance |
| JP2006247740A (en) * | 2005-03-14 | 2006-09-21 | Kobe Steel Ltd | Copper or copper alloy sheet strip for press forming |
| CN103191932A (en) * | 2012-01-09 | 2013-07-10 | 宝山钢铁股份有限公司 | Detection method for strip steel tension fluctuation between racks of hot continuous rolling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110355212A (en) * | 2018-03-26 | 2019-10-22 | 宝山钢铁股份有限公司 | A kind of milling train automatic stop arrangement, control system and control method |
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| CN110090867A (en) * | 2019-05-14 | 2019-08-06 | 北京科技大学设计研究院有限公司 | A method of piling of steel between edger roll and plain-barreled roll when plain-barreled roll being prevented to sting steel |
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