CN104815850B - A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System and method - Google Patents
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System and method Download PDFInfo
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- CN104815850B CN104815850B CN201510179687.4A CN201510179687A CN104815850B CN 104815850 B CN104815850 B CN 104815850B CN 201510179687 A CN201510179687 A CN 201510179687A CN 104815850 B CN104815850 B CN 104815850B
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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
- B21B37/48—Tension control; Compression control
Abstract
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System and method, belong to hydraulic pressure all-pull mill tension control technology field.The Minimum Tension Control System of the present invention includes a left side, right two set tension force hydraulic cylinder and hydraulic systems, proportional pressure control valve is included in hydraulic system, servo valve and proportional pressure-reducing valve, the tension force stage is set up at rolled piece, the shutdown phase that rolled piece carries out rolling sequence and passes terminates, by controlling a left side, right two set proportional pressure control valves, servo valve and the on and off of proportional pressure-reducing valve, and it is set corresponding controlled quentity controlled variable, tension force hydraulic cylinder just passing ratio air relief valve and tonometer can carry out tension closed loop regulation, or passing ratio overflow valve and tonometer carry out tension closed loop regulation, in rolled piece feeding and blanking stage, tension force hydraulic cylinder carries out position closed loop regulation by servo valve and displacement transducer.The tension control of the present invention is simpler effectively, and tension force control accuracy has been effectively ensured, it is achieved bigger fragility or the micro tension milling of difficult deformable metal band.
Description
Technical field
The invention belongs to hydraulic pressure all-pull mill tension control technology field, particularly relate to a kind of hydraulic pressure tension force warm-rolling machine Minimal Tension control
System and method processed.
Background technology
At present, the hydraulic pressure tension force warm-rolling machine of experiment can carry out on-line heating and carry out tension-rolling unitary piece of metal band sample,
For carrying out room temperature difficulty deformable metal warm-rolling process test research, being that the industrialized production realizing metal sheet band creates technical conditions.
For having bigger fragility or the sheet metal strip of difficult deformation under room temperature, it usually needs after on-line heating and at Minimal Tension (＜ 3kN)
Under the conditions of carry out warm-rolling, in order to ensure the rolling accuracy of rolled piece, it is necessary that the control accuracy of Minimal Tension.And existing tension force
Control method is position-force control and the closed-loop tension control by realizing tension force hydraulic cylinder while controlling servo valve flow, should
Method needs accurately to calculate the front sliding rate in the operation of rolling and rear sliding rate, and it is more suitable for cold-rolled process, and for warm-rolling mistake
Journey, owing to front sliding rate is relevant with factors such as coefficient of friction, reduction ratio, THICKNESS CALCULATION precision with rear sliding rate, and coefficient of friction with
The factors such as rolled piece temperature, roller temperature and roll surface roughness are relevant, therefore cause the front sliding rate during warm-rolling and rear sliding rate
Calculating error relatively big, make the tension force control accuracy during warm-rolling the highest, the operation of rolling often occur belt phenomenon.So,
Existing tension control method inapplicable hydraulic pressure tension force warm-rolling machine.
Therefore, a kind of mild tension condition method being suitable for hydraulic pressure tension force warm-rolling machine is needed badly, it is possible to parting a little during guarantee warm-rolling
Power control accuracy, and ensure that there is bigger fragility or the rolling accuracy of difficult deformable metal band.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System and method, energy
Enough ensure the mild tension condition precision during warm-rolling, and ensure the rolling accuracy of rolled piece.
To achieve these goals, the present invention adopts the following technical scheme that a kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System,
Including left clamp, right clamp, left tension force hydraulic cylinder, right tension force hydraulic cylinder, left hydraulic system and right hydraulic system, described left folder
Pincers are connected with the piston rod of left tension force hydraulic cylinder, are provided with left tonometer, described right clamp and right tension force hydraulic pressure in its junction
The piston rod of cylinder is connected, and is provided with right tonometer in its junction；Described left tension force hydraulic cylinder built-in left dislocation sensor, institute
State the built-in right displacement transducer of right tension force hydraulic cylinder；
Left proportional pressure control valve, left servo valve and left proportional pressure-reducing valve is included in described left hydraulic system, described left proportional pressure-reducing valve
Oil-in is connected with the high pressure fuel source of left hydraulic system, and the oil-out of left proportional pressure-reducing valve is connected with the oil-in of left servo valve,
Oil-out one tunnel of left servo valve is connected with the rod chamber of left tension force hydraulic cylinder, the oil-in phase of another road and left proportional pressure control valve
Connection, the oil-out of left proportional pressure control valve is connected with the supply reservoir of left hydraulic system；The rodless cavity of described left tension force hydraulic cylinder
It is connected with the low pressure oil sources of left hydraulic system；
Right proportional pressure control valve, right servo valve and right proportional pressure-reducing valve is included in described right hydraulic system, described right proportional pressure-reducing valve
Oil-in is connected with the high pressure fuel source of right hydraulic system, and the oil-out of right proportional pressure-reducing valve is connected with the oil-in of right servo valve,
Oil-out one tunnel of right servo valve is connected with the rod chamber of right tension force hydraulic cylinder, the oil-in phase of another road and right proportional pressure control valve
Connection, the oil-out of right proportional pressure control valve is connected with the supply reservoir of right hydraulic system；The rodless cavity of described right tension force hydraulic cylinder
It is connected with the low pressure oil sources of right hydraulic system.
Between the oil-in and the high pressure fuel source of left hydraulic system of described left proportional pressure-reducing valve, the oil-in of right proportional pressure-reducing valve with
It is respectively connected with high pressure filter, at oil-in and the high-pressure filteration of described left proportional pressure-reducing valve between the high pressure fuel source of right hydraulic system
Between device, the oil-in of right proportional pressure-reducing valve and and high pressure filter between be respectively connected with check valve.
Oil-in, the oil-in of right proportional pressure-reducing valve at described left proportional pressure-reducing valve are respectively connected with accumulator.
The rodless cavity of described left tension force hydraulic cylinder, the rodless cavity of right tension force hydraulic cylinder is all connected with oil pressure sensor in turn and pressure measurement connects
Head；The rod chamber of described left tension force hydraulic cylinder, the rod chamber of right tension force hydraulic cylinder are all connected with pressure measuring tie-in and oil pressure sensing in turn
Device.
Between the oil-out and the supply reservoir of left hydraulic system of described left proportional pressure control valve, oil return opening and the left liquid of left servo valve
Between the supply reservoir of pressure system, between the oil-out of right proportional pressure control valve and the supply reservoir of right hydraulic system, right servo valve
It is respectively connected with check valve between the supply reservoir of oil return opening and right hydraulic system.
The mild tension condition method of the hydraulic pressure tension force warm-rolling machine Minimum Tension Control System described in employing, comprises the steps:
Step one: before rolling starts, control left servo valve, right servo valve is in open mode, and controlled quentity controlled variable be all set as 3%～
5%, control left proportional pressure control valve, right proportional pressure control valve is closed, start left hydraulic system and right hydraulic system, pass through
Left hydraulic system is left tension force hydraulic cylinder fuel feeding, by right hydraulic system to right tension force hydraulic cylinder fuel feeding, the most left tension force hydraulic cylinder
Carrying out tension closed loop regulation by left proportional pressure-reducing valve and left tonometer, right tension force hydraulic cylinder passes through right proportional pressure-reducing valve and right tension force
Meter carries out tension closed loop regulation, sets up tension force for rolled piece；
Step 2: roll
(1) when rolling direction from right to left time, control left servo valve and be in open mode, and controlled quentity controlled variable is set as 70%～100%,
Control left proportional pressure control valve to be closed, control right servo valve and be in open mode, and controlled quentity controlled variable is set as 3%～5%, control
Making right proportional pressure-reducing valve and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the most left tension force hydraulic cylinder is subtracted by left ratio
Pressure valve and left tonometer carry out tension closed loop regulation, and right tension force hydraulic cylinder carries out tension force by right proportional pressure control valve and right tonometer and closes
Ring regulates, it is achieved the warm-rolling of rolled piece；
(2) when rolling direction from left to right time, control right servo valve and be in open mode, and controlled quentity controlled variable is set as 70%～100%,
Control right proportional pressure control valve to be closed, control left servo valve and be in open mode, and controlled quentity controlled variable is set as 3%～5%, control
Making left proportional pressure-reducing valve and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the rightest tension force hydraulic cylinder is subtracted by right ratio
Pressure valve and right tonometer carry out tension closed loop regulation, and left tension force hydraulic cylinder carries out tension force by left proportional pressure control valve and left tonometer and closes
Ring regulates, it is achieved the warm-rolling of rolled piece；
Step 3: at the end of single passage or whole passes, hydraulic pressure tension force warm-rolling machine is in dead ship condition, controls a left side and watches
Take valve, right servo valve is in open mode, and controlled quentity controlled variable is set as 3%～5%, controls left proportional pressure control valve, right proportional pressure control valve
Being closed, the most left tension force hydraulic cylinder carries out tension closed loop regulation, right tension force by left proportional pressure-reducing valve and left tonometer
Hydraulic cylinder carries out tension closed loop regulation by right proportional pressure-reducing valve and right tonometer；
Step 4: after whole passes terminate, first passes through the tension force of left and right hydraulic system unloading rolled piece, then controls
Roll gap lifts, and opens left clamp or right clamp, then controls left proportional pressure-reducing valve and right proportional pressure-reducing valve is in open mode, and control
Amount processed is set as 50%～90%, controls left proportional pressure control valve and right proportional pressure control valve is closed, the most left tension force hydraulic cylinder
Carrying out position closed loop regulation by left servo valve and left dislocation sensor, right tension force hydraulic cylinder passes through right servo valve and right displacement sensing
Device carries out position closed loop regulation, and then makes left tension force hydraulic cylinder and right tension force hydraulic cylinder piston rod return in cylinder, now opens right folder
Pincers or left clamp take off the rolled piece rolled.
Beneficial effects of the present invention:
The present invention compared with prior art, overcomes traditional tension control technology and can only meet limitation and the deficiency of cold-rolling mill, and
Tension control is simpler effectively, during in the face of having bigger fragility or difficult deformable metal band, warm-rolling process has been effectively ensured
In tension force control accuracy, and realize Minimal Tension (＜ 3kN) rolling, improve strip in razor-thin (thickness of strip ＜ 0.1mm)
Whole rolling quality.
Accompanying drawing explanation
Fig. 1 is a kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System schematic diagram of the present invention；
In figure, 1 warm-rolling machine, 2 rolled pieces, 3 left clamps, 4 right clamps, 5 left tension force hydraulic cylinders, 6 right tension force liquid
Cylinder pressure, the rodless cavity of 7 left tension force hydraulic cylinders, the rod chamber of 8 left tension force hydraulic cylinders, the rodless cavity of 9 right tension force hydraulic cylinders,
The rod chamber of 10 right tension force hydraulic cylinders, 11 left dislocation sensors, 12 right displacement transducers, 13 left tonometeies, 14
Right tonometer, 15 left proportional pressure control valves, 16 right proportional pressure control valves, 17 left servo valves, 18 right servo valves, 19 is left
Proportional pressure-reducing valve, 20 right proportional pressure-reducing valves, 21 accumulators, 22 high pressure filters, 23 check valves, 24 pressure measurement connect
Head, 25 oil pressure sensors.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System, including left clamp 3, right clamp 4, left tension force liquid
Cylinder pressure 5, right tension force hydraulic cylinder 6, left hydraulic system and right hydraulic system, described left clamp 3 and the piston of left tension force hydraulic cylinder 5
Bar is connected, and is provided with left tonometer 13 in its junction, and described right clamp 4 is connected with the piston rod of right tension force hydraulic cylinder 6,
Right tonometer 14 is installed in its junction；Described left tension force hydraulic cylinder 5 built-in left dislocation sensor 11, described right tension force hydraulic pressure
The built-in right displacement transducer 12 of cylinder 6；
Left proportional pressure control valve 15, left servo valve 17 and left proportional pressure-reducing valve 19, described left ratio is included in described left hydraulic system
The oil-in of air relief valve 19 is connected with the high pressure fuel source of left hydraulic system, the oil-out of left proportional pressure-reducing valve 19 and left servo valve
The oil-in of 17 is connected, and oil-out one tunnel of left servo valve 17 is connected with the rod chamber 8 of left tension force hydraulic cylinder 5, another
Road is connected with the oil-in of left proportional pressure control valve 15, the oil-out of left proportional pressure control valve 15 and the supply reservoir of left hydraulic system
It is connected；The described rodless cavity 7 of left tension force hydraulic cylinder 5 is connected with the low pressure oil sources of left hydraulic system；
Right proportional pressure control valve 16, right servo valve 18 and right proportional pressure-reducing valve 20, described right ratio is included in described right hydraulic system
The oil-in of air relief valve 20 is connected with the high pressure fuel source of right hydraulic system, the oil-out of right proportional pressure-reducing valve 20 and right servo valve
The oil-in of 18 is connected, and oil-out one tunnel of right servo valve 18 is connected with the rod chamber 10 of right tension force hydraulic cylinder 6, another
Road is connected with the oil-in of right proportional pressure control valve 16, the oil-out of right proportional pressure control valve 16 and the supply reservoir of right hydraulic system
It is connected；The described rodless cavity 9 of right tension force hydraulic cylinder 6 is connected with the low pressure oil sources of right hydraulic system.
Between oil-in and the high pressure fuel source of left hydraulic system of described left proportional pressure-reducing valve 19, the entering of right proportional pressure-reducing valve 20
High pressure filter 22 it is respectively connected with, in the oil-feed of described left proportional pressure-reducing valve 19 between the high pressure fuel source of hydraulic fluid port and right hydraulic system
Mouthful and high pressure filter 22 between, the oil-in of right proportional pressure-reducing valve 20 and and high pressure filter 22 between be respectively connected with check valve
23。
Oil-in, the oil-in of right proportional pressure-reducing valve 20 at described left proportional pressure-reducing valve 19 are respectively connected with accumulator 21.
The rodless cavity 7 of described left tension force hydraulic cylinder, the rodless cavity 9 of right tension force hydraulic cylinder 6 are all connected with oil pressure sensor 25 in turn
And pressure measuring tie-in 24；The rod chamber 8 of described left tension force hydraulic cylinder 5, the rod chamber 10 of right tension force hydraulic cylinder 6 are all connected with in turn
Pressure measuring tie-in 24 and oil pressure sensor 25.
Between oil-out and the supply reservoir of left hydraulic system of described left proportional pressure control valve 15, the oil return opening of left servo valve 17
And between the supply reservoir of left hydraulic system, between the oil-out of right proportional pressure control valve 16 and the supply reservoir of right hydraulic system, right
It is respectively connected with check valve 23 between oil return opening and the supply reservoir of right hydraulic system of servo valve 18.
Embodiment
In the present embodiment, rolled piece 2 is AZ31 Magnesium alloy strip, and original dimension is 3.95mm × 200mm × 1000mm, target thickness
A size of 0.7mm；The support roller a size of φ 480 × 350mm of hydraulic pressure tension force warm-rolling machine, working roll a size of φ 200 × 370mm；
The cylinder diameter of left and right tension force hydraulic cylinder is 90mm, and diameter of piston rod is 63mm, and stroke is 2100mm；Left and right ratio subtracts
The flow of pressure valve is 40L/min；The model of left and right servo valve is D661；The flow of left and right proportional pressure control valve is 40L/min；
The maximum range of left and right displacement transducer is 2150mm, and certainty of measurement is 0.01mm；The maximum range of left and right tonometer is
10kN, certainty of measurement is 0.1kN；The hydraulic oil that the high pressure fuel source of left and right hydraulic system provides is 21MPa, left and right hydraulic pressure system
The low pressure oil that the low pressure oil sources of system provides is 3MPa；Master control system uses the PLC of Siemens S7-400 series CPU416+FM458
Master control system.
Owing to rolled piece 2 is AZ31 Magnesium alloy strip, according to the material behavior of rolled piece 2, determine to use 6 passes schemes, rolled piece
2 reach target thickness after 6 passes, and during the first passage to six passes, its tension force setting value be followed successively by 4kN,
3kN、2.5kN、2kN、1.5kN、1.2kN。
The mild tension condition method of the hydraulic pressure tension force warm-rolling machine Minimum Tension Control System described in employing, comprises the steps:
Step one: before rolling starts, control left servo valve 17, right servo valve 18 is in open mode, and controlled quentity controlled variable is set as
3%～5%, control left proportional pressure control valve 15, right proportional pressure control valve 16 is closed, and starts left hydraulic system and right hydraulic pressure
System, is left tension force hydraulic cylinder 5 fuel feeding by left hydraulic system, by right hydraulic system to right tension force hydraulic cylinder fuel feeding, now
Left tension force hydraulic cylinder 5 carries out tension closed loop regulation by left proportional pressure-reducing valve 19 and left tonometer 13, and right tension force hydraulic cylinder 6 leads to
Cross right proportional pressure-reducing valve 20 and right tonometer 14 carries out tension closed loop regulation, set up tension force for rolled piece 2；
Step 2: roll
Owing to the present embodiment uses 6 passes, therefore set first, the three, the 5th passes directions as from right to left,
The second, four, six passes directions are from left to right；
(1) when rolling direction from right to left time, control left servo valve 17 and be in open mode, and controlled quentity controlled variable be set as 70%～
100%, control left proportional pressure control valve 15 and be closed, control right servo valve 18 and be in open mode, and controlled quentity controlled variable sets
It is 3%～5%, controls right proportional pressure-reducing valve 20 and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the most left tension force liquid
Cylinder pressure 5 carries out tension closed loop regulation by left proportional pressure-reducing valve 19 and left tonometer 13, and right tension force hydraulic cylinder 6 is by right ratio
Overflow valve 16 and right tonometer 14 carry out tension closed loop regulation, it is achieved the warm-rolling of rolled piece 2；
(2) when rolling direction from left to right time, control right servo valve 18 and be in open mode, and controlled quentity controlled variable be set as 70%～
100%, control right proportional pressure control valve 16 and be closed, control left servo valve 17 and be in open mode, and controlled quentity controlled variable sets
It is 3%～5%, controls left proportional pressure-reducing valve 19 and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the rightest tension force liquid
Cylinder pressure 6 carries out tension closed loop regulation by right proportional pressure-reducing valve 20 and right tonometer 14, and left tension force hydraulic cylinder 5 is by left ratio
Overflow valve 15 and left tonometer 13 carry out tension closed loop regulation, it is achieved the warm-rolling of rolled piece 2；
Step 3: at the end of single passage or whole passes, hydraulic pressure tension force warm-rolling machine is in dead ship condition, controls a left side and watches
Take valve 17, right servo valve 18 is in open mode, and controlled quentity controlled variable is set as 3%～5%, controls left proportional pressure control valve 15, right ratio
Example overflow valve 16 is closed, and the most left tension force hydraulic cylinder 5 carries out opening by left proportional pressure-reducing valve 19 and left tonometer 13
Power closed loop regulates, and right tension force hydraulic cylinder 6 carries out tension closed loop regulation by right proportional pressure-reducing valve 20 and right tonometer 14；
Step 4: after whole passes terminate, first passes through the tension force of left and right hydraulic system unloading rolled piece 2, then controls
Roll gap processed lifts, and opens left clamp 3 or right clamp 4, then controls left proportional pressure-reducing valve 19 and right proportional pressure-reducing valve 20 is in and beats
Open state, and controlled quentity controlled variable is set as 50%～90%, controls left proportional pressure control valve 15 and right proportional pressure control valve 16 is closed,
The most left tension force hydraulic cylinder 5 carries out position closed loop regulation, right tension force hydraulic cylinder by left servo valve 17 and left dislocation sensor 11
6 carry out position closed loop regulation by right servo valve 18 and right displacement transducer 12, and then make left tension force hydraulic cylinder 5 and right tension force
Hydraulic cylinder 6 piston rod is return in cylinder, now opens right clamp 4 or left clamp 3 takes off the rolled piece 2 rolled.
In like manner, with reference to step 4, tension force hydraulic cylinder carries out position closed loop regulation by servo valve and displacement transducer, can realize rolling
The feeding of part 2.
In the whole operation of rolling, in cycling start with when stopping, tension fluctuation scope is within ± 0.5kN；In lifting speed section,
Fluctuation scope is within ± 0.2kN；At at the uniform velocity rolling sequence, tension fluctuation scope is within ± 0.1kN, and rolled piece 2 does not goes out
Existing belt phenomenon, and rolled piece satisfactory quality, thus demonstrate effectiveness of the invention.
Scheme in embodiment is also not used to limit the scope of patent protection of the present invention, all equivalence enforcement done without departing from the present invention
Or change, it is both contained in the scope of the claims of this case.
Claims (6)
1. a hydraulic pressure tension force warm-rolling machine Minimum Tension Control System, it is characterised in that: include left clamp, right clamp, left tension force liquid
Cylinder pressure, right tension force hydraulic cylinder, left hydraulic system and right hydraulic system, described left clamp is connected with the piston rod of left tension force hydraulic cylinder
Connecing, be provided with left tonometer in its junction, described right clamp is connected with the piston rod of right tension force hydraulic cylinder, in its junction
Right tonometer is installed；Described left tension force hydraulic cylinder built-in left dislocation sensor, the described built-in right displacement sensing of right tension force hydraulic cylinder
Device；
Left proportional pressure control valve, left servo valve and left proportional pressure-reducing valve is included in described left hydraulic system, described left proportional pressure-reducing valve
Oil-in is connected with the high pressure fuel source of left hydraulic system, and the oil-out of left proportional pressure-reducing valve is connected with the oil-in of left servo valve,
Oil-out one tunnel of left servo valve is connected with the rod chamber of left tension force hydraulic cylinder, the oil-in phase of another road and left proportional pressure control valve
Connection, the oil-out of left proportional pressure control valve is connected with the supply reservoir of left hydraulic system；The rodless cavity of described left tension force hydraulic cylinder
It is connected with the low pressure oil sources of left hydraulic system；
Right proportional pressure control valve, right servo valve and right proportional pressure-reducing valve is included in described right hydraulic system, described right proportional pressure-reducing valve
Oil-in is connected with the high pressure fuel source of right hydraulic system, and the oil-out of right proportional pressure-reducing valve is connected with the oil-in of right servo valve,
Oil-out one tunnel of right servo valve is connected with the rod chamber of right tension force hydraulic cylinder, the oil-in phase of another road and right proportional pressure control valve
Connection, the oil-out of right proportional pressure control valve is connected with the supply reservoir of right hydraulic system；The rodless cavity of described right tension force hydraulic cylinder
It is connected with the low pressure oil sources of right hydraulic system.
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System the most according to claim 1, it is characterised in that: on a described left side
Between oil-in and the high pressure fuel source of left hydraulic system of proportional pressure-reducing valve, the oil-in of right proportional pressure-reducing valve and right hydraulic system
High pressure filter it is respectively connected with, between oil-in and the high pressure filter of described left proportional pressure-reducing valve, right ratio between high pressure fuel source
The oil-in of example air relief valve and and high pressure filter between be respectively connected with check valve.
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System the most according to claim 1, it is characterised in that: on a described left side
The oil-in of proportional pressure-reducing valve, the oil-in of right proportional pressure-reducing valve are respectively connected with accumulator.
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System the most according to claim 1, it is characterised in that: a described left side is opened
The rodless cavity of power hydraulic cylinder, the rodless cavity of right tension force hydraulic cylinder are all connected with oil pressure sensor and pressure measuring tie-in in turn；A described left side is opened
The rod chamber of power hydraulic cylinder, the rod chamber of right tension force hydraulic cylinder are all connected with pressure measuring tie-in and oil pressure sensor in turn.
A kind of hydraulic pressure tension force warm-rolling machine Minimum Tension Control System the most according to claim 1, it is characterised in that: described left ratio
The oil-out of example overflow valve and the oil return opening of left servo valve are connected with the supply reservoir of left hydraulic system by a check valve, institute
State the oil-out of right proportional pressure control valve and the oil return opening of right servo valve is connected with the supply reservoir of right hydraulic system by a check valve
Logical.
6. the mild tension condition method of employing hydraulic pressure tension force warm-rolling machine Minimum Tension Control System described in claim 1, its feature exists
In comprising the steps:
Step one: before rolling starts, control left servo valve, right servo valve is in open mode, and controlled quentity controlled variable is set as 3%～5%,
Control left proportional pressure control valve, right proportional pressure control valve is closed, and starts left hydraulic system and right hydraulic system, by left liquid
Pressure system is left tension force hydraulic cylinder fuel feeding, is passed through right tension force hydraulic cylinder fuel feeding, the most left tension force hydraulic cylinder by right hydraulic system
Left proportional pressure-reducing valve and left tonometer carry out tension closed loop regulation, and right tension force hydraulic cylinder is entered by right proportional pressure-reducing valve and right tonometer
Row tension closed loop regulates, and sets up tension force for rolled piece；
Step 2: roll
(1) when rolling direction from right to left time, control left servo valve and be in open mode, and controlled quentity controlled variable is set as 70%～100%,
Control left proportional pressure control valve to be closed, control right servo valve and be in open mode, and controlled quentity controlled variable is set as 3%～5%, control
Making right proportional pressure-reducing valve and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the most left tension force hydraulic cylinder is subtracted by left ratio
Pressure valve and left tonometer carry out tension closed loop regulation, and right tension force hydraulic cylinder carries out tension force by right proportional pressure control valve and right tonometer and closes
Ring regulates, it is achieved the warm-rolling of rolled piece；
(2) when rolling direction from left to right time, control right servo valve and be in open mode, and controlled quentity controlled variable is set as 70%～100%,
Control right proportional pressure control valve to be closed, control left servo valve and be in open mode, and controlled quentity controlled variable is set as 3%～5%, control
Making left proportional pressure-reducing valve and be in open mode, and controlled quentity controlled variable is set as 50%～90%, the rightest tension force hydraulic cylinder is subtracted by right ratio
Pressure valve and right tonometer carry out tension closed loop regulation, and left tension force hydraulic cylinder carries out tension force by left proportional pressure control valve and left tonometer and closes
Ring regulates, it is achieved the warm-rolling of rolled piece；
Step 3: at the end of single passage or whole passes, hydraulic pressure tension force warm-rolling machine is in dead ship condition, controls a left side and watches
Take valve, right servo valve is in open mode, and controlled quentity controlled variable is set as 3%～5%, controls left proportional pressure control valve, right proportional pressure control valve
Being closed, the most left tension force hydraulic cylinder carries out tension closed loop regulation, right tension force by left proportional pressure-reducing valve and left tonometer
Hydraulic cylinder carries out tension closed loop regulation by right proportional pressure-reducing valve and right tonometer；
Step 4: after whole passes terminate, first passes through the tension force of left and right hydraulic system unloading rolled piece, then controls
Roll gap lifts, and opens left clamp or right clamp, then controls left proportional pressure-reducing valve and right proportional pressure-reducing valve is in open mode, and control
Amount processed is set as 50%～90%, controls left proportional pressure control valve and right proportional pressure control valve is closed, the most left tension force hydraulic cylinder
Carrying out position closed loop regulation by left servo valve and left dislocation sensor, right tension force hydraulic cylinder passes through right servo valve and right displacement sensing
Device carries out position closed loop regulation, and then makes left tension force hydraulic cylinder and right tension force hydraulic cylinder piston rod return in cylinder, now opens right folder
Pincers or left clamp take off the rolled piece rolled.
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| CN105642670B (en) * | 2016-01-10 | 2017-09-29 | 东北大学 | A kind of coiling type warm-rolling devices and methods therefor of high silicon steel |
| CN109026860B (en) * | 2018-08-06 | 2020-06-23 | 中国矿业大学 | Proportional servo valve control hydraulic support platform upright post oil cylinder system and pressure control method |
| CN109108072A (en) * | 2018-10-23 | 2019-01-01 | 西部新锆核材料科技有限公司 | A kind of milling method of high-precision zircaloy plate |
| CN110328244B (en) * | 2019-07-09 | 2020-09-08 | 东北大学 | Hydraulic tension system of straight pull type cold/warm rolling experiment machine and control method thereof |
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| GB1204335A (en) * | 1967-11-21 | 1970-09-03 | Davy & United Eng Co Ltd | Rolling mills |
| JPS5010261B1 (en) * | 1969-06-14 | 1975-04-19 | ||
| JPH0613130B2 (en) * | 1985-10-31 | 1994-02-23 | 新日本製鐵株式会社 | Rolled plate thickness control method |
| JPH09327714A (en) * | 1996-06-07 | 1997-12-22 | Nisshin Steel Co Ltd | Tension control method of end part in strip width direction by looper device in continuous hot finishing mill |
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| CN102527740B (en) * | 2012-02-28 | 2013-11-06 | 东北大学 | Straight-pull cold-rolling mill tension control method based on speed feedforward |
| CN103567230B (en) * | 2013-11-12 | 2015-06-10 | 中冶东方工程技术有限公司 | Micro-tension control system and method |
| CN104148386A (en) * | 2014-07-01 | 2014-11-19 | 东北大学 | Hydraulic tension warm-rolling machine |
| CN204099314U (en) * | 2014-07-15 | 2015-01-14 | 常州宝菱重工机械有限公司 | The automatic thickness hydraulic control system of high low pressure independence split |
| CN104148409B (en) * | 2014-07-23 | 2016-01-20 | 东北大学 | A kind of rolled piece heating means of hydraulic pressure tension force warm-rolling machine |
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2015
- 2015-04-15 CN CN201510179687.4A patent/CN104815850B/en active Active
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Application publication date: 20150805 Assignee: Suzhou Dongbao Haixing metal material technology Co.,Ltd. Assignor: Northeastern University Contract record no.: X2022210000002 Denomination of invention: A micro tension control system and method for hydraulic tension warm rolling mill Granted publication date: 20160831 License type: Common License Record date: 20220111 |
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