CN104438348B - Hydraulic control device of rolling bending system of rolling mill - Google Patents
Hydraulic control device of rolling bending system of rolling mill Download PDFInfo
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- CN104438348B CN104438348B CN201410506870.6A CN201410506870A CN104438348B CN 104438348 B CN104438348 B CN 104438348B CN 201410506870 A CN201410506870 A CN 201410506870A CN 104438348 B CN104438348 B CN 104438348B
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Abstract
Provided is a hydraulic control device of a rolling bending system of a rolling mill. An oil port A1 of a first servo valve (1) is communicated with an oil port P2 of a first two-position four-way electromagnetic directional valve (2), an oil port A2 of the first two-position four-way electromagnetic directional valve is communicated with a piston cavity of an upper positive bending cylinder (8) and a piston cavity of a lower positive bending cylinder (9), an oil port B1 of the first servo valve is communicated with an oil port P3 of a second two-position four-way electromagnetic directional valve (3) and an oil port P4 of a third two-position four-way electromagnetic directional valve (4), an oil port A3 of the second two-position four-way electromagnetic directional valve is communicated with a piston cavity of an upper negative bending cylinder (7), an oil port A4 of the third two-position four-way electromagnetic directional valve is communicated with a piston cavity of a lower negative bending cylinder (10), an inlet of a pressure reducing valve (6) is communicated with an oil source P, an outlet of the pressure reducing valve is communicated with an oil port P5 of a fourth two-position four-way electromagnetic directional valve (5), and an oil port A5 of the fourth two-position four-way electromagnetic directional valve is communicated with the piston cavities of all the bending cylinders. The device is simple, reasonable and reliable in structure.
Description
Technical field
The invention belongs to technical field of hydraulic, especially a kind of hydraulic control device of mill roll bending system.
Background technology
In conjunction with Fig. 1, existing mill roll bending system includes bearing curved cylinder 7, upper just curved cylinder 8, lower just curved cylinder 9 and lower negative curved cylinder
10, hydraulic control device controls just curved cylinder using the first servo valve 1 and the second servo valve 12 simultaneously and bears curved cylinder hydraulic circuit,
Only allow positive bending roller force or negative bending roller force during actually used, do not allow positive bending roller force and negative bending roller force to exist simultaneously.
Positive bending roller force is achieved in that hydraulic fluid port P1 to the A1 of the first servo valve 1 connects, and pressure oil flows into first from A1 mouth
The P15 hydraulic fluid port of three-position four-way electromagnetic directional valve 15, the electromagnet b end of the first three-position four-way electromagnetic directional valve 15 is powered, hydraulic fluid port P15
Connect to A15, B15 to T15 connects, A15 connects generation with the plunger shaft of upper negative curved cylinder 7 and lower negative roll-bending cylinder 10 and bears curved power；The
The hydraulic fluid port P1 ' of two servo valves 12 arrives A1 ' and connects, and pressure oil flows into the P14 oil of the second three-position four-way electromagnetic directional valve 14 from A1 ' mouth
Mouthful, the electromagnet a end of the second three-position four-way electromagnetic directional valve 14 is powered, and hydraulic fluid port P14 to B14 connects, and A14 to T14 connects, B14
Connect the just curved power of generation, upper negative curved cylinder 7, upper just curved cylinder 8, lower just curved cylinder with the plunger shaft of upper positive roll-bending cylinder 8 and lower positive roll-bending cylinder 9
9 and the lower all rod end chambers bearing curved cylinder 10 be connected with the oil return inlet T of oil sources, there is no back pressure, actual bending roller force size is equal to just
The difference of bending roller force and negative bending roller force, in other words rod end chamber do not have back-pressure to produce, easily cause when bending roller force very little
Bending roller force control is unstable, and the size of positive bending roller force or negative bending roller force is passed by the first servo valve 1, the second servo valve 12 and pressure
Sensor forms closed loop to control.
In addition servo valve belongs to precision components, and price comparison is expensive, if servo valve breaks down in use
Specialized maintenance factory must be delivered to keeped in repair, maintenance cost is sufficiently expensive.
Content of the invention
For solving the above problems, the present invention devises a kind of hydraulic control device of mill roll bending system, this hydraulic control
Device saves a servo valve, increases a pressure-reducing valve, by the reasonable disposition of two-position four-way solenoid directional control valve so as to structure
More rationally, simple, reliable, reduce enterprise operation cost, decrease maintenance.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of hydraulic control device of mill roll bending system, described mill roll bending system contain bear curved cylinder, upper just curved cylinder,
Under just curved cylinder and lower bear curved cylinder, described hydraulic control device contains an oil path block, comprises the one or two four in an oil path block
Electric change valve, the second two-position four-way solenoid directional control valve, the 3rd two-position four-way solenoid directional control valve, the 4th two-position four-way electromagnetism change
To valve, pressure-reducing valve and the first servo valve, feature of the present utility model is as follows：
The P2 hydraulic fluid port UNICOM of the A1 hydraulic fluid port of the first servo valve and the first two-position four-way solenoid directional control valve, the first two-position four-way electricity
The A2 hydraulic fluid port of the magnetic reversal valve plunger shaft UNICOM with upper just curved cylinder and lower just curved cylinder respectively, the B1 hydraulic fluid port of the first servo valve respectively with
The P3 hydraulic fluid port of the second two-position four-way solenoid directional control valve and the P4 hydraulic fluid port UNICOM of the 3rd two-position four-way solenoid directional control valve, the two or two four
The A3 hydraulic fluid port of electric change valve with upper bear curved cylinder plunger shaft UNICOM, the A4 hydraulic fluid port of the 3rd two-position four-way solenoid directional control valve with
Bear the plunger shaft UNICOM of curved cylinder, the entrance of pressure-reducing valve and oil sources P UNICOM, the outlet of pressure-reducing valve and the 4th two-position four-way electromagnetic switch
The P5 hydraulic fluid port UNICOM of valve, the A5 hydraulic fluid port of the 4th two-position four-way solenoid directional control valve bears curved cylinder, upper just curved cylinder, lower just curved cylinder with upper respectively
And lower bear curved cylinder rod end chamber UNICOM.
Because using technical scheme as above, the present invention produces following effect：
1st, present configuration is reasonable, simple, reliable, and design cost and enterprise operation cost reduce, and enterprise's maintenance reduces.
2nd, because the rod end chamber in all curved cylinders is provided with back-pressure, therefore also can be steady well when bending roller force very little
Fixed control, the quality of milling train product is further enhanced, and efficiency significantly improves.
Brief description
Fig. 1 is the hydraulic control simplified schematic diagram of existing roll-bending device；
Fig. 2 is the hydraulic control simplified schematic diagram of the present invention；
Above-mentioned in figure：1- first servo valve；2- the first two-position four-way solenoid directional control valve；3- the second two-position four-way electromagnetism
Reversal valve；4- the 3rd two-position four-way solenoid directional control valve；5- the 4th two-position four-way solenoid directional control valve；6- pressure-reducing valve；Negative on 7-
Curved cylinder；Just curved cylinder on 8-；Just curved cylinder under 9-；Curved cylinder is born under 10-；Mono- oil path block of 11-；12- second servo valve；13-
First oil path block；14- second three-position four-way electromagnetic directional valve；15- first three-position four-way electromagnetic directional valve.
Specific embodiment
The present invention is a kind of hydraulic control device of mill roll bending system, described mill roll bending system contain bear curved cylinder 7,
On just curved cylinder 8, lower just curved cylinder 9 and lower bear curved cylinder 10, described hydraulic control device contains an oil path block 11, an oil path block 11
In comprise the first two-position four-way solenoid directional control valve 2, the second two-position four-way solenoid directional control valve 3, the 3rd two-position four-way solenoid directional control valve
4th, the 4th two-position four-way solenoid directional control valve 5, pressure-reducing valve 6 and the first servo valve 1.
The P2 hydraulic fluid port UNICOM of the A1 hydraulic fluid port of the first servo valve 1 and the first two-position four-way solenoid directional control valve 2, the first two-position four-way
The A2 hydraulic fluid port of the solenoid directional control valve 2 plunger shaft UNICOM with upper just curved cylinder 8 and lower just curved cylinder 9 respectively, the B1 hydraulic fluid port of the first servo valve 1
Respectively with the P3 hydraulic fluid port of the second two-position four-way solenoid directional control valve 3 and the P4 hydraulic fluid port UNICOM of the 3rd two-position four-way solenoid directional control valve 4, the
The A3 hydraulic fluid port of two two-position four-way solenoid directional control valves 3 and the upper plunger shaft UNICOM bearing curved cylinder 7, the 3rd two-position four-way solenoid directional control valve 4
A4 hydraulic fluid port and the lower plunger shaft UNICOM bearing curved cylinder 10, the entrance of pressure-reducing valve 6 and oil sources P UNICOM, the outlet of pressure-reducing valve 6 and the 4th
The P5 hydraulic fluid port UNICOM of two-position four-way solenoid directional control valve 5, the A5 hydraulic fluid port of the 4th two-position four-way solenoid directional control valve 5 bears curved cylinder with upper respectively
7th, upper just curved cylinder 8, lower just curved cylinder 9 and the lower rod end chamber UNICOM bearing curved cylinder 10.Other is arranged for routine.
Above-mentioned hydraulic control device makes to bear curved cylinder 7, upper just curved cylinder 8, lower just curved cylinder 9 and the lower rod end chamber bearing curved cylinder 10
It is provided with back pressure, the size of back pressure to be controlled by pressure-reducing valve 6, when just curved power or negative curved power very little, the 4th two-position four-way electromagnetism changes
Powered to valve 5.On just curved cylinder 8 and lower just curved cylinder 9 share a two-position four-way solenoid directional control valve, upper bear curved cylinder 7 and lower bear curved cylinder
10 respective using independent two-position four-way solenoid directional control valve.
Operation principle is as follows：
When needing positive bending roller force in the operation of rolling, P1 to A1, B1 to the T1 mouth of the first servo valve 1 is connected, pressure oil from
The A1 mouth of the first servo valve 1 flows out the P2 hydraulic fluid port flowing to the first two-position four-way solenoid directional control valve 2 again, then from the first two-position four-way electricity
The A2 hydraulic fluid port of magnetic reversal valve 2 enters the plunger shaft of just curved cylinder 8 and lower just curved cylinder 9, and actual bending roller force size is equal to roll-bending cylinder and lives
The pressure in plug chamber deducts the pressure of rod end chamber, and when positive bending roller force very little, the 4th two-position four-way solenoid directional control valve 5 is powered.
When needing negative bending roller force in the operation of rolling, P1 to B1, A1 to the T1 mouth connection of the first servo valve 1, pressure oil from
The B1 mouth of the first servo valve 1 flows out P3 hydraulic fluid port and the 3rd two-position four-way flowing to the second two-position four-way solenoid directional control valve 3 more respectively
The P4 hydraulic fluid port of solenoid directional control valve 4, then the A3 hydraulic fluid port from the second two-position four-way solenoid directional control valve 3 and the 3rd two-position four-way electromagnetic switch
The A4 mouth of valve 4 enters bears curved cylinder 7 and the lower plunger shaft bearing curved cylinder 10, and actual bending roller force size is equal to the pressure of roll-bending cylinder plunger shaft
Power deducts the pressure of rod end chamber, and when negative bending roller force very little, the 4th two-position four-way solenoid directional control valve 5 is powered.
When not needing bending roller force or roll change, the piston rod of all curved cylinders all must be retracted into reset condition.Now,
One servo valve 1 is in the middle working position of valve, and that is, P1, A1, B1, T1 mouth of the first servo valve 1 is all in closed mode, and the one or two
Position four-way electromagnetic reversing valve 2, the second two-position four-way solenoid directional control valve 3, the 3rd two-position four-way solenoid directional control valve 4 and the four or two four
Electric change valve 5 is all powered, and pressure oil enters the P5 hydraulic fluid port of the 4th two-position four-way solenoid directional control valve 5 from the outlet of pressure-reducing valve 6,
Enter the rod end chamber of all curved cylinders from the A5 hydraulic fluid port of the 4th two-position four-way solenoid directional control valve 5, the oil of plunger shaft flows back to T mouth again,
Piston rod is retracted into reset condition under pressure-reducing valve 6 setting state, now can carry out roller replacing operation.
Claims (1)
1. a kind of hydraulic control device of mill roll bending system, described mill roll bending system contains negative curved cylinder (7), upper just curved cylinder
(8), lower just curved cylinder (9) and lower negative curved cylinder (10), described hydraulic control device contains an oil path block (11), an oil path block
(11) the first two-position four-way solenoid directional control valve (2), the second two-position four-way solenoid directional control valve (3), the 3rd two-position four-way electricity are comprised in
Magnetic reversal valve (4), the 4th two-position four-way solenoid directional control valve (5), pressure-reducing valve (6) and the first servo valve (1), is characterized in that：
The A1 hydraulic fluid port of the first servo valve (1) and the P2 hydraulic fluid port UNICOM of the first two-position four-way solenoid directional control valve (2), the first two-position four-way
The A2 hydraulic fluid port of solenoid directional control valve (2) the plunger shaft UNICOM with upper just curved cylinder (8) and lower just curved cylinder (9) respectively, the first servo valve (1)
B1 hydraulic fluid port respectively with the P3 hydraulic fluid port of the second two-position four-way solenoid directional control valve (3) and the 3rd two-position four-way solenoid directional control valve (4)
P4 hydraulic fluid port UNICOM, the A3 hydraulic fluid port of the second two-position four-way solenoid directional control valve (3) and the upper plunger shaft UNICOM bearing curved cylinder (7), the three or two
The A4 hydraulic fluid port of position four-way electromagnetic reversing valve (4) and the lower plunger shaft UNICOM bearing curved cylinder (10), the entrance of pressure-reducing valve (6) and oil sources P
The P5 hydraulic fluid port UNICOM of UNICOM, the outlet of pressure-reducing valve (6) and the 4th two-position four-way solenoid directional control valve (5), the 4th two-position four-way electromagnetism
The work with upper negative curved cylinder (7), upper just curved cylinder (8), lower just curved cylinder (9) and lower negative curved cylinder (10) respectively of the A5 hydraulic fluid port of reversal valve (5)
Stopper rod chamber UNICOM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506870.6A CN104438348B (en) | 2014-09-28 | 2014-09-28 | Hydraulic control device of rolling bending system of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506870.6A CN104438348B (en) | 2014-09-28 | 2014-09-28 | Hydraulic control device of rolling bending system of rolling mill |
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| Publication Number | Publication Date |
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| CN104438348A CN104438348A (en) | 2015-03-25 |
| CN104438348B true CN104438348B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410506870.6A Active CN104438348B (en) | 2014-09-28 | 2014-09-28 | Hydraulic control device of rolling bending system of rolling mill |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108393358B (en) * | 2018-05-11 | 2024-03-22 | 中国重型机械研究院股份公司 | Positive and negative roll bending smooth transition system for working rolls of six-roll cold rolling mill |
| CN112576575B (en) * | 2020-12-16 | 2022-04-19 | 太原理工大学 | Hydraulic pressing system of four-upright-column twenty-high rolling mill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2815535Y (en) * | 2005-05-20 | 2006-09-13 | 鞍山钢铁集团公司 | Cold continuous rolling mill working roll bending-roll continuous no-dead-zone control device |
| CN101293260A (en) * | 2008-06-13 | 2008-10-29 | 中色科技股份有限公司 | Hydraulic control method and apparatus of combined hydraulic cylinder with bowed roll |
| CN201558853U (en) * | 2009-09-23 | 2010-08-25 | 东南铝业（中国）有限公司 | Roll bending control system for cold rolling mill |
| CN102107219A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Hydraulic control method for asymmetrical bowed roller of rolling mill |
| CN104001732A (en) * | 2014-05-20 | 2014-08-27 | 攀钢集团攀枝花钢钒有限公司 | Roll bending control system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0231001A (en) * | 1988-07-20 | 1990-02-01 | Hitachi Ltd | Hydraulic pressure controller |
| JPH06330904A (en) * | 1993-05-24 | 1994-11-29 | Sekisui Chem Co Ltd | Cylinder driving device |
-
2014
- 2014-09-28 CN CN201410506870.6A patent/CN104438348B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2815535Y (en) * | 2005-05-20 | 2006-09-13 | 鞍山钢铁集团公司 | Cold continuous rolling mill working roll bending-roll continuous no-dead-zone control device |
| CN101293260A (en) * | 2008-06-13 | 2008-10-29 | 中色科技股份有限公司 | Hydraulic control method and apparatus of combined hydraulic cylinder with bowed roll |
| CN201558853U (en) * | 2009-09-23 | 2010-08-25 | 东南铝业（中国）有限公司 | Roll bending control system for cold rolling mill |
| CN102107219A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Hydraulic control method for asymmetrical bowed roller of rolling mill |
| CN104001732A (en) * | 2014-05-20 | 2014-08-27 | 攀钢集团攀枝花钢钒有限公司 | Roll bending control system and method |
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