CN110000222A - A method of improving strip whipping sideslip - Google Patents
A method of improving strip whipping sideslip Download PDFInfo
- Publication number
- CN110000222A CN110000222A CN201910215983.3A CN201910215983A CN110000222A CN 110000222 A CN110000222 A CN 110000222A CN 201910215983 A CN201910215983 A CN 201910215983A CN 110000222 A CN110000222 A CN 110000222A
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- China
- Prior art keywords
- strip
- uncoiler
- sideslip
- length
- pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B21B37/72—Rear end control; Front end control
Abstract
The present invention provides a kind of method for improving strip whipping sideslip, the length including residual strip on monitoring uncoiler, according to the pressure for the length adjustment jockey pulley pressure roller cylinder for monitoring residual strip on uncoiler；The speed for monitoring uncoiler entrance, according to the tension for the speed adjustment entry loop for monitoring uncoiler entrance；Monitor the running deviation value of strip, according to monitoring that the running deviation value of strip adjusts the pressure of zinc-plated lap welder clamp, by the length for monitoring residual strip, the pressure of the adjustment jockey pulley pressure roller cylinder of adaptability can reduce the running deviation value of strip, it is unlikely to that strip is made to skid again, the tension of adjustment entry loop can reduce strip because the tension of entry loop has skidded or whipping, and during the welding process, the pressure of zinc-plated lap welder clamp is controlled according to the running deviation value of strip, make centering of strip steel, welding is facilitated to carry out, the sideslip of coiled strip steel after can also preventing, has good practicability.
Description
Technical field
The present invention relates to cold rolling production technical field more particularly to a kind of methods for improving strip whipping sideslip.
Background technique
Strip belongs to cold conditions sideslip in the whipping sideslip of zinc-plated entrance.Currently, in the cracking zinc-plated entrance of rhythm of production
In operation, the continuous galvanizing line of modernization requires strip that must run under certain stable state, but the sideslip of strip is almost
Inevitably, strip running deviation not only will affect strip quality, or even can seriously damage unit equipment, the stable operation to unit
It affects.
Before the whipping process of galvanizing unit belongs to entrance production, a coiled strip steel produces the last one step finished, if
There is whipping sideslip process, strip may deflect away from roller edge, and operator must be refunded and be welded again, and welding machine is influenced
Centering, the trimming accuracy of end trimming shears, furnace area reduction of speed or parking cause with the generation produced and influence producing line operation.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of improvement strip whipping race
Inclined method.
In order to achieve the above purpose, present invention employs the following technical solutions:
In a general aspect, a kind of method improving strip whipping sideslip is provided, is included the following steps:
Monitor the length of residual strip on uncoiler；
According to the pressure for the length adjustment jockey pulley pressure roller cylinder for monitoring residual strip on uncoiler；
Monitor the speed of uncoiler entrance；
According to the tension for the speed adjustment entry loop for monitoring uncoiler entrance；
Monitor the running deviation value of strip；
According to monitoring that the running deviation value of strip adjusts the pressure of zinc-plated lap welder clamp.
Preferably, the pressure of jockey pulley pressure roller cylinder is 0.4~0.6MPa.
Preferably, the length of jockey pulley pressure roller is greater than the length of jockey pulley.
Preferably, according to monitoring that the pressure of residual strip length adjustment jockey pulley pressure roller cylinder on uncoiler specifically wraps
It includes:
The preset length of residual strip on given uncoiler,
When the length of residual strip on uncoiler is greater than preset length, increase the pressure of jockey pulley pressure roller cylinder；
When the length of residual strip on uncoiler is less than preset length, reduce the pressure of jockey pulley pressure roller cylinder.
Preferably, the value of the pressure of jockey pulley pressure roller cylinder is calculated according to formula Z=mX+n, wherein Z is jockey pulley pressure roller
The pressure value of cylinder, X are the length of residual strip on uncoiler, and m, n are known constant.
Preferably, it is specifically included according to the tension for the speed adjustment entry loop for monitoring uncoiler entrance:
When monitoring the speed reduction of speed of uncoiler entrance to 30m/min, the tension for controlling entry loop is default
Power；
When monitor the speed reduction of speed of uncoiler entrance to the tension for when shutting down, controlling entry loop be pre-set tension
80%.
Preferably, the value of pre-set tension is calculated according to formula F=atb, wherein F is the pre-set tension value, and a is strip
The coefficient of tension at entry loop, t are steel strip thickness, and b is strip width.
Preferably, according to monitoring that the thickness of strip adjusts the pressure of zinc-plated lap welder clamp and specifically include: working as strip
Running deviation value increase when, increase the pressure of zinc-plated lap welder clamp.
Preferably, zinc-plated lap welder is narrow lap welder or laser welder.
The present invention provides it is a kind of improve strip whipping sideslip method, due to when steel band shear after, magnetic tape trailer partial-length
Longer, the probability that whipping sideslip occurs is bigger, therefore passes through the length of monitoring residual strip, the adjustment jockey pulley pressure roller of adaptability
The pressure of cylinder to adjust the elasticity of strip, and then reduces the running deviation value of strip, and be unlikely to that strip is made to skid；Work as monitoring
When the speed of uncoiler entrance reduces progress weld preparation work, the tension of entry loop will pull strip and move on, and adjust
The tension of whole entry loop can reduce strip because the tension of entry loop has skidded or whipping, and in the mistake of welding
Cheng Zhong, since inevitable sideslip has occurred, so needing to control zinc-plated lap welder clamp according to the running deviation value of strip
Pressure makes centering of strip steel, and welding is facilitated to carry out, and the sideslip of coiled strip steel after can also preventing has good practicability.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart of the method for improvement strip whipping sideslip of the invention；
Fig. 2 is the strip stress diagram on jockey pulley of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Fig. 1 is the flow chart of the method for improvement strip whipping sideslip of the invention, as shown in Figure 1, the improvement of the present embodiment
The method of strip whipping sideslip, comprising the following steps:
The length of residual strip on S01, monitoring uncoiler.
In the step S01 of the present embodiment, since strip whipping sideslip occurs on jockey pulley, when strip is got rid of
When tail acts, strip belongs to tension-free state, since the two sides of strip are uneven by the pressure of pressure roller, under the rolling of pressure roller
It the more can grind the more inclined, sideslip occurs under the action of pressure roller for strip, therefore remaining strip length is longer, then in the process of sideslip
In, the offset of strip will be bigger.And due to the difference of steel grade, the difference of the specification of steel bands, the running deviation value of strip is not yet
It is identical.After a current coiled strip steel and the welding of latter coiled strip steel finish clearance, if still there is sideslip trend, rear a roll of strip
Sideslip can be increasingly severe.
S02, basis monitor the pressure of residual strip length adjustment jockey pulley pressure roller cylinder on uncoiler.
In the step S02 of the present embodiment, for the steel band of specification of the same race, need first to be arranged the default of remaining steel band length
Length increases jockey pulley pressure roller when the length for monitoring the steel band of remaining this kind of specification on uncoiler is greater than preset length
The pressure of cylinder prevents the offset of steel bands from rapidly expanding, meanwhile, when monitoring remaining this kind of specification on uncoiler
When the length of steel band is less than preset length, need to reduce the pressure of jockey pulley pressure roller cylinder.If pressure is excessive, steel band is just
It can skid on jockey pulley, to all slide into uncoiler entrance, cause that subsequent welding can not be carried out.
Further, it is specifically wrapped according to the pressure of the length adjustment jockey pulley pressure roller cylinder of residual strip on monitoring uncoiler
Include: the value Z, m, n that the pressure of jockey pulley pressure roller cylinder is calculated according to formula Z=mX+n are dependent constant.Due to the entire production line
Uncoiler and the distance of coil of strip be certain, then in uncoiling class strip, so that it may according to many experiments as a result, true
Determine the value range of strip residue length, X is the length of residual strip on uncoiler in certain interior uncoiling process of the value range
Degree, while determination can not only prevent strip running deviation, but also the value of the pressure of the jockey pulley pressure roller cylinder of strip skidding can be prevented
Value range, then the two value ranges then existing correlation, thus may determine that the numerical value of the dependent constants such as m, n, is carrying out
When unwinding op next time, then the pressure of jockey pulley pressure roller cylinder at that time can be determined according to the length of real surplus strip
Value, it is ensured that anti-deviation effect is best.
Further, in used unwinder device, the length of jockey pulley pressure roller is greater than the length of jockey pulley, due to
The length of jockey pulley pressure roller covers entire jockey pulley, then jockey pulley pressure roller can begin during strip whipping sideslip
It is close together eventually with steel band, above-mentioned pressure is provided for steel band, to prevent steel band whipping running deviation value excessive.
S03, the speed for monitoring uncoiler entrance.
In the step S03 of the present embodiment, of the entry loop of the speed and uncoiler entrance of uncoiler entrance
Power is positively correlated, and when needing that previous coiled strip steel and next coiled strip steel are carried out to shearing docking, the speed of uncoiler entrance can reduce,
If the tension of the entry loop of entrance is constant when speed reduces, since the deformation pulling force that entry loop generates can incite somebody to action
Strip is pulled into entrance, is unfavorable for the progress of welding.
S04, basis monitor the tension of the speed adjustment entry loop of uncoiler entrance.
In the step S04 of the present embodiment, when needing to carry out previous coiled strip steel and next coiled strip steel shearing docking, open
Volume machine entrance speed shifts to an earlier date reduction of speed to 60m/min, and when strip grating signal detects the tail portion of strip, i.e., previous coiled strip steel is
It is completed through uncoiling, i.e., will enter whipping process, continue to reduce uncoiler entrance speed at this time to 30m/min, then entrance
Low strap steel can also be creeped with the speed of 30m/min, need to reduce the tension of the entry loop of uncoiler entrance at this time, if should
Tension is pre-set tension, then the tension of the entry loop of entrance needs when the speed reduction of speed of uncoiler entrance is to when shutting down
It adjusts to the 80% of pre-set tension, otherwise under the action of former pre-set tension, strip can be pulled into entrance.
Fig. 2 is the strip stress diagram on jockey pulley of the invention, as shown in Fig. 2, according to uncoiler entrance is monitored
The tension of the speed adjustment entry loop of section specifically includes, and the value F of the pre-set tension is calculated according to formula F=atb, specific next
It says, the result of product of this three of tension=steel strip thickness × strip width × coefficient of tension of entry loop, a is strip in entrance
The coefficient of tension at loop, t are steel strip thickness, and b is strip width.
S05, the running deviation value for monitoring strip.
In the step S05 of the present embodiment, since the whipping sideslip of strip not can avoid, after above-mentioned 4 steps,
Part running deviation value is improved, but strip still has certain running deviation value, which will affect previous coiled strip steel and rear a roll
Therefore the welding of strip monitors the running deviation value of strip, prepare for last adjustment.
S06, basis monitor that the running deviation value of strip adjusts the pressure of zinc-plated lap welder clamp.
In the step S06 of the present embodiment, needs to weld previous coiled strip steel and latter coiled strip steel, be needed before welding
It is carried out in the welding platform of welding machine to middle work, therefore, it is necessary to lead to using the narrow lap welder or laser welder with clamp
The running deviation value for crossing the strip obtained, adjusts the pressure of clamp, so that clamp is pushed the centering of strip steel of sideslip, running deviation value is bigger, clamp
Required pressure is bigger.Due to the maximum distance of clamp in each welding machine be it is fixed, can be by detecting
The running deviation value control clamp of strip be expanded to the distance between clamp and can accommodate strip, then control clamp slowly in
Between draw close, by the motive force of clamp by centering of strip steel, after centering of strip steel, maintain the chucking power of clamp constant so that
Strip is able to maintain that the state of centering, guarantee strip can normal weld, and running deviation value is not present in the strip after welding.
Embodiment 2
As the another embodiment of this specification, unlike the first embodiment, in the step S02 of the present embodiment, adopt
It is the steel band that specification is 1.3mm × 1250mm, during actual test, the value range of strip residue length is 21~
The value range of 25m, the value of the pressure of jockey pulley pressure roller cylinder are 0.4~0.6MPa, bring above-mentioned value range into formula Z=
MX+n can calculate m be 0.05, n is -0.65, i.e. Z=0.05X-0.65, then the preset length of residual strip on uncoiler is set
For median 23m, then the preset value that the pressure of jockey pulley pressure roller cylinder can be calculated is 0.5MPa, then subsequent
Strip uncoiling process in, when the length of residual strip on uncoiler is greater than preset length, increase jockey pulley pressure roller cylinder
Pressure reduces the pressure of jockey pulley pressure roller cylinder when the length of residual strip on uncoiler is less than preset length, and only needs
The value for detecting strip residue length, the pressure of corresponding jockey pulley pressure roller cylinder can be calculated by bringing into above-mentioned corresponding formula
The value of power.
Further, in the step S04 of the present embodiment, as shown in Fig. 2, the direction of F is the direction that strip is advanced, this
The steel band that embodiment is 1.3mm × 1250mm using specification, the coefficient of tension that experiment measures the specification strip steel is 1.4, that
Tension of the strip in jockey pulley exit is tension F=atb=14 × 1.3 × 1250=that entry loop provides
22750N, and since the tension at strip whipping end is zero, tension F of the strip at entry loop is needed through pressure roller
The frictional force that pressure G is generated just is avoided that strip is brought into uncoiler by the tension at entry loop to offset.
Further, by the value of the pressure of the adjustment jockey pulley pressure roller cylinder in step S02 and making jockey pulley pressure roller
Length is greater than the length of jockey pulley can be very good to compensate the tension at entry loop to increase contact area to increase and rub,
Also, when necessary, the tension F of entry loop is adjusted to the 80% of pre-set tension, i.e., by the tension F tune of entry loop
The whole frictional force that pressure roller generation is adapted to 22750N × 80%=18200N, prevents strip running deviation.
To sum up, the embodiment of the invention provides it is a kind of improve strip whipping sideslip method, due to when steel band shear after, band
Portion length is longer, and the probability that whipping sideslip occurs is bigger, therefore passes through the length of monitoring residual strip, the adjustment of adaptability
The pressure of jockey pulley pressure roller cylinder to adjust the elasticity of strip, and then reduces the running deviation value of strip, and be unlikely to beat strip
It is sliding；When monitor uncoiler entrance speed reduce carry out weld preparation work when, the tension of entry loop will pull strip after
Continuous to advance, the tension for adjusting entry loop can reduce strip because the tension of entry loop has skidded or whipping, and
During the welding process, since inevitable sideslip has occurred, so needing to control zinc-plated overlap joint according to the running deviation value of strip
The pressure of welding machine clamp, makes centering of strip steel, and welding is facilitated to carry out, and the sideslip of coiled strip steel after can also preventing has good reality
The property used.
It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims
It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment
It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable
Sequence or consecutive order are just able to achieve desired result.In some embodiments, multitasking and parallel processing be also can
With or may be advantageous.
It should be pointed out that for those skilled in the art, under the premise of not departing from the application principle,
Several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the application.
Claims (9)
1. a kind of method for improving strip whipping sideslip, which comprises the steps of:
Monitor the length of residual strip on uncoiler；
According to the pressure for the length adjustment jockey pulley pressure roller cylinder for monitoring residual strip on the uncoiler；
Monitor the speed of uncoiler entrance；
According to the tension for the speed adjustment entry loop for monitoring the uncoiler entrance；
Monitor the running deviation value of strip；
According to monitoring that the running deviation value of the strip adjusts the pressure of zinc-plated lap welder clamp.
2. the method according to claim 1 for improving strip whipping sideslip, which is characterized in that the jockey pulley pressure roller cylinder
Pressure be 0.4~0.6MPa.
3. the method according to claim 2 for improving strip whipping sideslip, which is characterized in that the length of the jockey pulley pressure roller
Degree is greater than the length of the jockey pulley.
4. the method according to claim 1 for improving strip whipping sideslip, which is characterized in that the basis monitors described
The pressure of residual strip length adjustment jockey pulley pressure roller cylinder specifically includes on uncoiler:
The preset length of residual strip on the uncoiler is given,
When the length of residual strip on the uncoiler is greater than preset length, increase the pressure of the jockey pulley pressure roller cylinder；
When the length of residual strip on the uncoiler is less than preset length, reduce the pressure of the jockey pulley pressure roller cylinder.
5. the method according to claim 4 for improving strip whipping sideslip, which is characterized in that counted according to formula Z=mX+n
Calculate the pressure value of the jockey pulley pressure roller cylinder, wherein Z is the pressure value of jockey pulley pressure roller cylinder, and X is to remain on the uncoiler
The length of remaining strip, m, n are known constant.
6. the method according to claim 1 for improving strip whipping sideslip, which is characterized in that the basis monitors described
The tension of the speed adjustment entry loop of uncoiler entrance specifically includes:
When monitoring the speed reduction of speed of uncoiler entrance to 30m/min, the tension for controlling entry loop is pre-set tension；
When monitor the speed reduction of speed of uncoiler entrance to the tension for when shutting down, controlling entry loop be pre-set tension
80%.
7. the method according to claim 6 for improving strip whipping sideslip, which is characterized in that calculated according to formula F=atb
The pre-set tension value, wherein F is the pre-set tension value, and a is the coefficient of tension of the strip at entry loop, and t is that strip is thick
Degree, b is strip width.
8. the method according to claim 1 for improving strip whipping sideslip, which is characterized in that the basis monitors described
The pressure that the thickness of strip adjusts zinc-plated lap welder clamp specifically includes: when the running deviation value of the strip increases, increasing plating
The pressure of zinc lap welder clamp.
9. the method according to claim 1 for improving strip whipping sideslip, which is characterized in that the zinc-plated lap welder is
Narrow lap welder or laser welder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215983.3A CN110000222B (en) | 2019-03-21 | 2019-03-21 | Method for improving drift deviation of strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215983.3A CN110000222B (en) | 2019-03-21 | 2019-03-21 | Method for improving drift deviation of strip steel |
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| Publication Number | Publication Date |
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| CN110000222A true CN110000222A (en) | 2019-07-12 |
| CN110000222B CN110000222B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910215983.3A Active CN110000222B (en) | 2019-03-21 | 2019-03-21 | Method for improving drift deviation of strip steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699362A (en) * | 2020-06-08 | 2021-11-26 | 中冶赛迪技术研究中心有限公司 | Parking tension eliminating method for large-scale strip steel continuous annealing furnace |
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