CN102773269B - Plate rolling transporter and control method thereof - Google Patents
Plate rolling transporter and control method thereof Download PDFInfo
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- CN102773269B CN102773269B CN201210290656.2A CN201210290656A CN102773269B CN 102773269 B CN102773269 B CN 102773269B CN 201210290656 A CN201210290656 A CN 201210290656A CN 102773269 B CN102773269 B CN 102773269B
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Abstract
The invention discloses a plate rolling transporter and a control method thereof. The device comprises a plurality of bi-conical rollers and at least one supporting roller, wherein the bi-conical rollers are orderly arranged on a transferring channel; and the supporting roller is arranged on the transferring channel and at the middle part between the two bi-conical rollers; and the mounting rack of the supporting roller is connected with a driving cylinder for driving the mounting rack to ascend and descend; according to the temperature, width and thickness of a plate material detected by a sensor and the material of a rolled plate, the judgment of whether the middle part of the plate material used for the next process is arched is performed; and if so, the arching quantity is calculated, and the height position of the supporting roller is adjusted by the driving cylinder according to the arching quantity of the middle part, so that the middle part of the plate material is supported. According to the plate rolling transporter and the control method thereof, the arching quantity of the middle part during the process of rolling the plate material is compensated by the supporting device, the ascending quantity and descending quantity of the supporting roller can be adjusted along with the changes of the width and thickness of the plate material, so that the dynamic compensation on the arching quantity of the middle part is achieved.
Description
Technical field
The present invention relates to stress metal processing technique field, especially a kind of Work sheet conveying device of rolling line and conveyance control method thereof.
Background technology
In order to make Aluminum Alloy Plate obtain good surface quality, production line adopts biconial roller-way conventionally, make strip transport during with rolling double side contact with roller-way, and plate surface not with roller-way and roller-way between grid contact.But in the operation of rolling, along with the increase of pass deformation, the width of aluminium sheet strengthens gradually, and thickness reduces gradually, makes strip very easily occur recessed deflection, i.e. the usually said waist phenomenon of collapsing.This increases the contact area that causes grid between strip and roller-way and roller-way and surface tear occurs.The waist phenomenon of collapsing in the operation of rolling has become the primary difficult problem that the super wide thin aluminum sheet of restriction is produced.Based on the existence of an above-mentioned difficult problem, super wide thin aluminum sheet presents the state that supply falls short of demand in market, price Continued.At present, also there is not special technology for this difficult problem, solve with corresponding control technology so need to design suitable bracing or strutting arrangement.
Summary of the invention
The object of this invention is to provide a kind of plate rolling conveying device, this plate rolling conveying device can solve the super wide light sheet of rolling occur the collapsing problem of waist.
In order to address the above problem, the technical solution used in the present invention is: this plate rolling conveying device includes the multiple biconial rollers that are sequentially arranged on transfer passage, have a support rollers that is arranged on the middle part between two described biconial rollers on this transfer passage at least, the installing rack of this support rollers is connected with a driving cylinder that drives this installing rack lifting.
In above-mentioned plate rolling conveying device technical scheme, technical scheme can also be more specifically: have a position sensor that detects described support rollers position height at least, described position sensor is connected on the input of controller of a described driving cylinder of control.The wheel face of described support rollers is made up of lightening fire resistant material.Multiple support rollers are housed on described installing rack.
Another object of the present invention is to provide a kind of plate rolling conveyance control method, and this plate rolling conveyance control method can compensate the waist amount of collapsing in the super wide light sheet process of rolling.
In order to achieve the above object, the technical solution used in the present invention is: this plate rolling conveyance control method, adopt a kind of plate rolling conveying device, this plate rolling conveying device includes the multiple biconial rollers that are sequentially arranged on transfer passage, have a support rollers that is arranged on the middle part between two described biconial rollers on this transfer passage at least, the installing rack of this support rollers is connected with a driving cylinder that drives this installing rack lifting; Have a position sensor that detects described support rollers position height at least, described position sensor is connected on the input of controller of a described driving cylinder of control;
Plate rolling pipage control carries out according to following steps:
A, described controller are according to sheet material material, temperature and the flakiness ratio of rolling, and whether the lower passage sheet material of judgement there will be the waist that collapses;
If the waist that collapses appears in B judgement, calculate its waist amount of collapsing, and carry out the height and position of adjustable supporting roll according to the waist amount of collapsing by controller and driving cylinder.
In above-mentioned plate rolling conveyance control method, technical scheme can also be more specifically:
The lower passage sheet material of judgement occurs collapsing after waist, and the collapse compensation rate of waist of lower passage sheet material adopts following formula calculating:
for preset value;
for the oblique angle of biconial roller cone, unit is degree; E is the length of biconial roller intermediate cylindrical part, and unit is millimeter;
upper along the distance to the absolute straight edge at present of sheet material width for biconial roller middle part, unit is millimeter,
for the exit width of passage under sheet material.
Described support rollers described in segmentation lifting on transfer passage, some rise time of controlling the driving cylinder piston rod of described support rollers calculates according to following formula:
Relational expression between the roll surface length that sheet material outlet length and roll turn over is:
Wherein, advancing slip value
calculating formula be:
The roll surface length gauge formula that roll turns over is:
The roll surface length turning over according to roll, calculates sheet material outlet length in real time, when
time, when the length of sheet material covers all support rollers of first driving cylinder control of roll outlet side:
When
when in time, cover the support rollers of second driving cylinder control:
When
time cover
when the support rollers of individual driving cylinder control:
Driving cylinder starts the time point rising
for:
Wherein,
for pre-set mill speed curve;
be real-time sheet material outlet length, unit is millimeter;
for the roll surface length that real-time roll turns over, unit is millimeter;
for working roll radius, unit is millimeter;
for drafts, unit is millimeter;
for the distance between each support rollers, unit is millimeter;
for arrive the distance of the roll axis of milling train from a nearest support rollers of milling train, unit is millimeter; The support rollers number of each driving cylinder control is
;
for the timeorigin of nipping of sheet material, desirable
=0, unit is second;
for sheet material outlet length covers the time point of certain bracing or strutting arrangement, unit be second;
for driving cylinder rises the required time, unit is second.
Use the accurately position height of the described support rollers in location of Real-time Feedback value of described position sensor, if deviation meets
time, assert that hydraulic cylinder puts in place, wherein,
the actual measurement height value of the support rollers that measures of position sensor,
for the allowable error of default.
Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect: being installed on transfer passage is the liftable support rollers of biconial roller-way, played a supporting role in strip middle part, the lifting amount of support rollers can be adjusted along with the variation of sheet material width and thickness, thereby the waist amount of collapsing is compensated in real time; When irregularly shaped, can enable segmentation elevating function when " discount " or other appear in sheet material end to end, reduce sheet material end to end with bracing or strutting arrangement bump may; The application of this device and control technology thereof can solve effectively due to the sheet material surface quality deterioration problem that waist causes of collapsing, can the wide light sheet of high-quality and high-efficiency ground production excess of export.
Brief description of the drawings
Fig. 1 is the top view of biconial roller-way and support device structure in the present invention.
Fig. 2 is the front view of biconial roller-way and bracing or strutting arrangement in the present invention.
Fig. 3 is the schematic diagram of bracing or strutting arrangement in inoperative position in the present invention.
Fig. 4 is the schematic diagram of bracing or strutting arrangement in working position in the present invention.
Fig. 5 rises and controls the schematic diagram that first group of bracing or strutting arrangement rises according to sheet material outlet length.
Fig. 6 rises and controls the schematic diagram that second group of bracing or strutting arrangement rises according to sheet material outlet length.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
Bracing or strutting arrangement in plate rolling conveying device shown in Fig. 1 is arranged between the front and back biconial roller-way of milling train and other relate between the biconial roller-way that transports finished product, bracing or strutting arrangement includes support rollers 2, installing rack 5 and driving cylinder, support rollers 2 is positioned on installing rack 5 by roll neck 4 and bearing block 3, and driving cylinder is driven by controller.Middle part between two biconial rollers 1 is provided with a support rollers 2, and biconial roller 1 is the roller of big at both ends and small in middle, and its two ends are that cone, centre are cylinder.Support rollers 2 is the hollow rotation roller of passive type, scratches plate surface when avoiding contacting, and its material is elected rubber or other lightweights as can exotic material, for example chromium plating etc. on roll surface.Ensureing, under the prerequisite of backing roll 2 intensity, should to reduce quality and the radius of support rollers 2, to reach the object that reduces backing roll 2 rotary inertias as far as possible.Driving cylinder in embodiment adopts hydraulic cylinder, installing rack 5 is connected and fixed on the piston rod of hydraulic cylinder, the effect of installing rack 5 is only to need a hydraulic cylinder can drive several support rollers 2 to move up and down to regulate the height and position that supports sheet material middle part, to save cost.The present invention has higher requirements to the levelness of installing rack 5, to guarantee that support rollers mounted thereto 2 is all in same level line, to reduce the adjustable height error of support rollers 2.3 support rollers 2 are installed on the each installing rack 5 on the transfer passage of the plate rolling conveying device shown in Fig. 2, biconial roller 1 is installed in frame by bearing block 3, the position sensor 6 that detects support rollers 2 position height is installed on hydraulic cylinder 7, this position sensor 6 can be external sensor, in other embodiment, also can use built-in sensor, position sensor 6 is electrically connected with the input of controller.
Every useful parameter shown in Fig. 3 and Fig. 4 comprises:
during for off working state, rotary support roller 2 tops are to the distance on edge on biconial roller 1 middle part, and unit is millimeter;
for edge on biconial roller 1 middle part is to the definitely distance on straight edge at present of sheet material 8 widths, unit is millimeter;
for the waist compensation rate of collapsing of sheet material 8, unit is millimeter; Biconial roller 1 total length is F, and unit is millimeter; Roller intermediate cylindrical partial-length is E, and unit is millimeter; Hydraulic cylinder 7 ranges are
, unit is millimeter; Minimum stroke is
, unit is millimeter; The oblique angle of biconial roller 1 cone is
, unit is degree.If current rolling pass number is
.
When sheet material 8 is rolling to certain a time, whether there will be by the lower a time of computer judgement the waist phenomenon of collapsing, the actual temperature of establishing certain aluminum alloy plate materials is
, the hardness factor being determined by alloy material is
, the rear sheet material width that rolls of lower passage is measured as through side jig
if sheet material is excessively thin, cannot measure with the clamping of side jig time, can calculates and obtain by spreading of the operation of rolling.Thickness is as calculated
, computing formula is:
Wherein
be
the setting roll gap of passage,
for setting roll-force, can obtain by pass schedule.
for setting roll-force, can be obtained by roll gap zeroing.
for the rigidity of milling train, can be obtained by rigidity test.
Judge that the waist that whether occurs after a time rolling collapsing under sheet material can be according to following formula:
(1)
Wherein,
for the waist that collapses is judged empirical coefficient, from production practices.
for the function taking alloy temperature, material hardness coefficient and sheet material flakiness ratio as independent variable.The temperature of sheet material is recorded by the temperature measurer being arranged on before and after milling train, the width of sheet material by machine before side jig after machine record.In the time that above formula is set up, illustrate down that a time sheet material will occur the waist phenomenon of collapsing.In the time that sheet material 8 is not nipped milling train, all bracing or strutting arrangements of milling train opposite side will rise and put in place in advance.
As shown in Figure 3, the waist compensation rate of collapsing should be made up of two parts, that is:
(2)
for preset value, choosing of its value should be able to ensure that bracing or strutting arrangement is not in the time coming into operation, and can not form and interfere with the direct of travel of sheet material.
The waist compensation rate of collapsing is the stroke that stretches out of hydraulic cylinder 7, and it has determined the range of hydraulic cylinder 7
for:
(3)
Wherein
for the sheet material Breadth Maximum of technique decision.Therefore, the collapse scope of waist compensation rate should have:
In the time that the compensation rate of real-time calculating is not within the scope of this, hydraulic cylinder is failure to actuate.
For support rollers 2 can accurately be located, utilize the value of feedback of position sensor 6 to carry out closed-loop control location.If the actual measurement height value of the support rollers 2 that position sensor 6 measures is
if deviation meets
time, assert that hydraulic cylinder puts in place,
for the allowable error of default.
As shown in Figure 5 and Figure 6, in the time that the Head and Tail Shape of sheet material 8 is irregular or plate shape is poor, if milling train outlet side bracing or strutting arrangement all rises in advance, likely can occur sheet material end to end with the phenomenon of bracing or strutting arrangement collision, both affect the quality of sheet material, likely damaged again bracing or strutting arrangement.Because support rollers 2 is hollow roller, certainly will form impact to its intensity, the collision under cannot withstand prolonged duty, scraping.Suppose that the distance between each support rollers 2 is
, unit is millimeter; A support rollers 2 nearest from milling train to the distance of operation roll of mill 9 axis is
, unit is millimeter; The support rollers number of each cylinder controls is
.The principle of segmentation start and stop is that this group roller is answered jack-up putting in place in the time that the length of sheet material outlet covers one group of support rollers completely.Therefore should set up Mathematical Modeling and calculate in real time the outlet length of sheet material.
1) first turn in real time length and rolled piece and export in real time the relation of length according to roll, calculate the real-time outlet length of rolled piece
In the operation of rolling, due to advancing slip existence, the length that therefore roll surface turns over will be slightly less than the outlet length of rolled piece, the relation between these two length is done to simple derivation below:
From advancing slip formula:
(4)
After conversion, can obtain:
(5)
Be multiplied by the time simultaneously on both sides
:
(6)
Because roll will first turn over after asynchronous region length, sheet material could be from opposite side out, and therefore the outlet length of sheet material is:
(7)
Wherein
be the mill speed of rolled piece, unit is mm/second;
be roll rotational speed, unit is mm/second;
be rolling time, unit is second;
be the real-time outlet length of rolled piece, unit is millimeter; .
for roll turn in real time length, unit is millimeter;
for roller radius, unit is millimeter;
for drafts, unit is millimeter;
be advancing slip value, its algorithm is as follows:
(8)
2) calculating roll according to time and roll rotational speed turns over length and is:
(9)
Wherein,
for the mill speed curvilinear function of rolled piece, it is predefined value;
for start time point, the time point of namely nipping, desirable
=0.
the time of having nipped for roll.
The outlet length that formula (9) substitution formula (7) can be obtained to sheet material is:
(10)
Suppose that the speed that hydraulic cylinder rises is
, unit is mm/second, the needed time is about
, unit is second.Therefore work as
time, all support rollers of first hydraulic cylinder control of length cover outlet side of sheet material 8, can be obtained by formula (10):
(11)
In the time covering the support rollers of second hydraulic cylinder control:
(12)
When covering the
when the support rollers of individual hydraulic cylinder control:
(13)
Can go out by inverse according to above formula
numerical value.Consider that hydraulic cylinder rises the required time
.Hydraulic cylinder starts the time point rising
for:
(14)
Start timing using the sheet material time point of nipping as timeorigin, process
after second, hydraulic cylinder starts to rise.In the time that sheet material leaves each group of bracing or strutting arrangement gradually, its hydraulic cylinder order falls after rise.
By 499 milli roll-forces
thousand Ns, lower a time sheet material width
=2359.34 millimeters, roll gap
=13.85 millimeters, roll-force
thousand Ns, mill stiffness
=8,000 thousand Ns/millimeter, zeroing roll-force
=10,000 thousand Ns, working roll radius
,
, the oblique angle of biconial roller cone is 1.64 °, roller middle part cylindrical part length
=500 millimeters, the widest product specification
=3100 millimeters, the controlled support rollers number of each hydraulic cylinder
, each support rollers spacing is
800 millimeters; Arrive the distance of operation roll of mill axis from a nearest support rollers of milling train
3765.5 millimeters, the speed of bracing or strutting arrangement hydraulic cylinder
=30 mm/second.Using the time point of nipping as timeorigin,
=0.For simplicity, the rotating speed of supposing roll is constant speed
mm/second.The lower a time sheet material of computer judgement is the appearance waist phenomenon of comparatively significantly collapsing,
The waist compensation rate of collapsing of sheet material
for:
The limit compensation rate of bracing or strutting arrangement is:
This passage thickness
with lower passage thickness
be respectively:
，
Calculating advancing slip value is:
In the time of all support rollers of first hydraulic cylinder control of outlet length cover outlet side of sheet material, the required time
for:
In the time covering the support rollers of second hydraulic cylinder control, the required time
for:
When covering the
when the support rollers of individual hydraulic cylinder control:
Hydraulic cylinder rises and puts in place the required time
for:
Therefore hydraulic cylinder should export length compared with sheet material and covers the time point of bracing or strutting arrangement and will shift to an earlier date 1.152 seconds, and therefore, the time point that first hydraulic cylinder rises should be:
The time point of second hydraulic cylinder rise should be:
The
the time point that individual hydraulic cylinder rises should be:
。
Claims (4)
1. a plate rolling conveyance control method, it is characterized in that: adopt a kind of plate rolling conveying device, this plate rolling conveying device includes the multiple biconial rollers that are sequentially arranged on transfer passage, have a support rollers that is arranged on the middle part between two described biconial rollers on this transfer passage at least, the installing rack of this support rollers is connected with a driving cylinder that drives this installing rack lifting; Have a position sensor that detects described support rollers position height at least, described position sensor is connected on the input of controller of a described driving cylinder of control;
Plate rolling pipage control carries out according to following steps:
A, described controller are according to sheet material material, temperature and the flakiness ratio of rolling, and whether the lower passage sheet material of judgement there will be the waist that collapses;
If the waist that collapses appears in B judgement, calculate its waist amount of collapsing, and carry out the height and position of adjustable supporting roll according to the waist amount of collapsing by controller and driving cylinder.
2. plate rolling conveyance control method according to claim 1, is characterized in that: the lower passage sheet material of judgement occurs collapsing after waist, and the collapse compensation rate of waist of lower passage sheet material adopts following formula calculating:
for preset value;
for the oblique angle of biconial roller cone, unit is degree; E is the length of biconial roller intermediate cylindrical part, and unit is millimeter;
upper along the distance to the absolute straight edge at present of sheet material width for biconial roller middle part, unit is millimeter,
for the exit width of passage under sheet material.
3. plate rolling conveyance control method according to claim 1 and 2, is characterized in that: the support rollers on segmentation lifting transfer passage, and some rise time of controlling the driving cylinder piston rod of described support rollers calculates according to following formula:
Relational expression between the roll surface length that sheet material outlet length and roll turn over is:
Wherein, advancing slip value
calculating formula be:
The roll surface length gauge formula that roll turns over is:
The roll surface length turning over according to roll, calculates sheet material outlet length in real time, when
time, when the length of sheet material covers all support rollers of first driving cylinder control of roll outlet side:
When
when in time, cover the support rollers of second driving cylinder control:
When
time cover
when the support rollers of individual driving cylinder control:
Driving cylinder starts the time point rising
for:
Wherein,
for pre-set mill speed curve;
be real-time sheet material outlet length, unit is millimeter;
for the roll surface length that real-time roll turns over, unit is millimeter;
for working roll radius, unit is millimeter;
for drafts, unit is millimeter;
for the distance between each support rollers, unit is millimeter;
for arrive the distance of the roll axis of milling train from a nearest support rollers of milling train, unit is millimeter; The support rollers number of each driving cylinder control is
;
for the timeorigin of nipping of sheet material, desirable
=0, unit is second;
for sheet material outlet length covers the time point of certain bracing or strutting arrangement, unit be second;
for driving cylinder rises the required time, unit is second.
4. plate rolling conveyance control method according to claim 3, is characterized in that: use the accurately position height of the described support rollers in location of Real-time Feedback value of described position sensor, if deviation meets
time, assert that hydraulic cylinder puts in place, wherein,
the actual measurement height value of the support rollers that measures of position sensor,
for the allowable error of default.
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|---|---|---|---|
| CN201210290656.2A CN102773269B (en) | 2012-08-16 | 2012-08-16 | Plate rolling transporter and control method thereof |
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|---|---|---|---|
| CN201210290656.2A CN102773269B (en) | 2012-08-16 | 2012-08-16 | Plate rolling transporter and control method thereof |
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| CN102773269B true CN102773269B (en) | 2014-07-23 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2781273A4 (en) * | 2011-11-19 | 2015-09-09 | Univ Jilin | Rolling device and the method thereof |
| CN104492824B (en) * | 2014-11-26 | 2017-05-31 | 河南万达铝业有限公司 | Roller-way and the method for eliminating hot continuous rolling aluminium sheet impression in 2400 continuous hot-rolling mill machines |
| CN105363795B (en) * | 2015-11-17 | 2017-08-08 | 北京科技大学 | Rolling line taper rollgang speed dynamic cooperation control system and its method |
| GB201522549D0 (en) | 2015-12-21 | 2016-02-03 | Primetals Technologies Ltd | Roller table apparatus |
| CN108655177B (en) * | 2017-03-31 | 2019-12-27 | 宝山钢铁股份有限公司 | Intelligent anti-collision control method for roller bed frame |
| CN110497010B (en) * | 2019-08-08 | 2021-02-02 | 北京科技大学设计研究院有限公司 | Aluminum alloy medium plate shearing length sizing equipment and control method |
| CN112046997B (en) * | 2020-08-19 | 2022-02-01 | 宝钢特钢韶关有限公司 | Main conveying roller anti-collision device and using method thereof |
| CN112808779A (en) * | 2020-12-30 | 2021-05-18 | 东北轻合金有限责任公司 | Device and method for preventing lower surface of aluminum plate of hot roughing mill from being scratched |
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| GB116928A (en) * | 1917-06-28 | 1918-06-28 | John Beck Mckibbin | An Improved Process And Apparatus for Rolling Metals. |
| CN2820379Y (en) * | 2005-07-26 | 2006-09-27 | 天津市天锻压力机有限公司 | Hydraulic and mechanic driven liftable plate digital control transport device |
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| CN101528373A (en) * | 2006-10-31 | 2009-09-09 | 东芝三菱电机产业系统株式会社 | Hot rolling device |
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| JP2843165B2 (en) * | 1991-03-20 | 1999-01-06 | 日新製鋼株式会社 | Rolls for preventing buckling waves and wrinkles generated in ultrathin metal strips during threading and methods of using the rolls |
| JP2006297463A (en) * | 2005-04-22 | 2006-11-02 | Kobe Steel Ltd | Method for threading sheet in hot-rolling line for aluminum sheet |
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|---|---|---|---|---|
| GB116928A (en) * | 1917-06-28 | 1918-06-28 | John Beck Mckibbin | An Improved Process And Apparatus for Rolling Metals. |
| CN2820379Y (en) * | 2005-07-26 | 2006-09-27 | 天津市天锻压力机有限公司 | Hydraulic and mechanic driven liftable plate digital control transport device |
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| CN201239747Y (en) * | 2008-08-13 | 2009-05-20 | 中国第一重型机械集团公司 | Novel hoisting support apparatus |
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