CN104438348A - Hydraulic control device of rolling mill roll bending system - Google Patents
Hydraulic control device of rolling mill roll bending system Download PDFInfo
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- CN104438348A CN104438348A CN201410506870.6A CN201410506870A CN104438348A CN 104438348 A CN104438348 A CN 104438348A CN 201410506870 A CN201410506870 A CN 201410506870A CN 104438348 A CN104438348 A CN 104438348A
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- way solenoid
- solenoid directional
- directional control
- control valve
- curved cylinder
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- 238000013000 roll bending Methods 0.000 title claims abstract description 18
- 238000005096 rolling process Methods 0.000 title abstract description 4
- 239000012530 fluid Substances 0.000 claims description 43
- 238000005452 bending Methods 0.000 description 20
- 238000012423 maintenance Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
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- Control Of Metal Rolling (AREA)
Abstract
A hydraulic control device of a rolling mill roll bending system is characterized in that an A1 oil port of a first servo valve is communicated with a P2 oil port of a first two-position four-way electromagnetic directional valve (2), an A2 oil port of the first two-position four-way electromagnetic directional valve is respectively communicated with piston cavities of an upper positive bent cylinder (8) and a lower positive bent cylinder (9), a B1 oil port of the first servo valve is respectively communicated with a P3 oil port of a second two-position four-way electromagnetic directional valve (3) and a P4 oil port of a third two-position four-way electromagnetic directional valve (4), an A3 oil port of the second two-position four-way electromagnetic directional valve is communicated with a piston cavity of an upper negative bent cylinder (7), an A4 of the third two-position four-way electromagnetic directional valve is communicated with a piston cavity of a lower negative bent 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 a P5 oil port of a fourth two-position four-way electromagnetic directional valve (5), and an A5 oil port of the fourth, the device has simple, reasonable and reliable 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
Composition graphs 1, existing mill roll bending system comprises negative curved cylinder 7, upper just curved cylinder 8, lower just curved cylinder 9 and lower negative curved cylinder 10, hydraulic control device adopts the first servo valve 1 and the second servo valve 12 to control just curved cylinder and negative curved cylinder hydraulic circuit simultaneously, only allow positive bending roller force or negative bending roller force in actual use, do not allow positive bending roller force and negative bending roller force to exist simultaneously.
Positive bending roller force realizes like this, hydraulic fluid port P1 to the A1 of the first servo valve 1 connects, pressure oil flows into the P15 hydraulic fluid port of the first three-position four-way electromagnetic directional valve 15 from A1 mouth, the electromagnet b end band electricity of the first three-position four-way electromagnetic directional valve 15, hydraulic fluid port P15 to A15 connects, B15 to T15 connects, and the plunger shaft of A15 and upper negative curved cylinder 7 and lower negative roll-bending cylinder 10 is connected and produced negative curved power, the hydraulic fluid port P1 ' to A1 ' of the second servo valve 12 connects, pressure oil flows into the P14 hydraulic fluid port of the second three-position four-way electromagnetic directional valve 14 from A1 ' mouth, the electromagnet a end band electricity of the second three-position four-way electromagnetic directional valve 14, hydraulic fluid port P14 to B14 connects, A14 to T14 connects, the plunger shaft of B14 and upper positive roll-bending cylinder 8 and lower positive roll-bending cylinder 9 is connected and is produced just curved power, upper negative curved cylinder 7, on just curved cylinder 8, under all rod end chambers of just curved cylinder 9 and lower negative curved cylinder 10 be connected with the oil return inlet T of oil sources, there is no back pressure, actual bending roller force size equals the difference of positive bending roller force and negative bending roller force, rod end chamber does not have back-pressure to produce in other words, bending roller force is very easily caused to control when bending roller force is very little unstable, the size of positive bending roller force or negative bending roller force is by the first servo valve 1, second servo valve 12 and pressure sensor form closed loop and control.
In addition servo valve belongs to precision components, and price comparison is expensive, if in use servo valve breaks down and must deliver to specialized maintenance factory and keep in repair, maintenance cost is very expensive.
Summary of the invention
For solving the problem, the present invention devises a kind of hydraulic control device of mill roll bending system, this hydraulic control device saves a servo valve, increase a pressure-reducing valve, by the reasonable disposition of two-position four-way solenoid directional control valve, make its structure more rationally, simply, reliably, reduce enterprise operation cost, decrease maintenance.
For achieving the above object, the present invention adopts following technical scheme:
A kind of hydraulic control device of mill roll bending system, described mill roll bending system contains negative curved cylinder, upper just curved cylinder, lower just curved cylinder and lower negative curved cylinder, described hydraulic control device contains the second oil path block, comprise the first two-position four-way solenoid directional control 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 solenoid directional control valve, pressure-reducing valve and the first servo valve in second oil path block, feature of the present invention is as follows:
The A1 hydraulic fluid port of the first servo valve and the P2 hydraulic fluid port UNICOM of the first two-position four-way solenoid directional control valve, the A2 hydraulic fluid port of the first two-position four-way solenoid directional control valve respectively with the plunger shaft UNICOM of upper just curved cylinder and lower just curved cylinder, 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 A3 hydraulic fluid port of the second two-position four-way solenoid directional control valve and the plunger shaft UNICOM of upper negative curved cylinder, the A4 hydraulic fluid port of the 3rd two-position four-way solenoid directional control valve and the plunger shaft UNICOM of lower negative curved cylinder, the entrance of pressure-reducing valve and oil sources P UNICOM, the outlet of pressure-reducing valve and the P5 hydraulic fluid port UNICOM of the 4th two-position four-way solenoid directional control valve, the A5 hydraulic fluid port of the 4th two-position four-way solenoid directional control valve bears curved cylinder with upper respectively, on just curved cylinder, under the rod end chamber UNICOM of just curved cylinder and lower negative curved cylinder.
Owing to adopting technical scheme as above, the present invention produces following effect:
1, the present invention is rational in infrastructure, simple, reliable, and design cost and enterprise operation cost reduce, and enterprise's maintenance reduces.
2, owing to being provided with back-pressure at the rod end chamber of all curved cylinders, therefore also can good stability contorting when bending roller force is very little, the quality of milling train product is further enhanced, and efficiency significantly improves.
Accompanying drawing explanation
Fig. 1 is the hydraulic control simplified schematic diagram of existing roll-bending device;
Fig. 2 is hydraulic control simplified schematic diagram of the present invention;
In above-mentioned figure: 1-first servo valve; 2-first two-position four-way solenoid directional control valve; 3-second two-position four-way solenoid directional control 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; The upper negative curved cylinder of 7-; Just curved cylinder on 8-; Just curved cylinder under 9-; Negative curved cylinder under 10-; 11-second oil path block; 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.
Detailed description of the invention
The present invention is 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 in the second oil path block 11, second oil path block 11 and comprises the first two-position four-way solenoid directional control valve 2, second two-position four-way solenoid directional control valve 3, the 3rd two-position four-way solenoid directional control valve 4, the 4th two-position four-way solenoid directional control valve 5, pressure-reducing valve 6 and the first servo valve 1.
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 A2 hydraulic fluid port of the first two-position four-way solenoid directional control valve 2 respectively with the plunger shaft UNICOM of upper just curved cylinder 8 and lower just curved cylinder 9, 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 A3 hydraulic fluid port of the second two-position four-way solenoid directional control valve 3 and the plunger shaft UNICOM of upper negative curved cylinder 7, the A4 hydraulic fluid port of the 3rd two-position four-way solenoid directional control valve 4 and the plunger shaft UNICOM of lower negative curved cylinder 10, the entrance of pressure-reducing valve 6 and oil sources P UNICOM, the outlet of pressure-reducing valve 6 and the P5 hydraulic fluid port UNICOM of the 4th 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 7 with upper respectively, on just curved cylinder 8, under the rod end chamber UNICOM of just curved cylinder 9 and lower negative curved cylinder 10.Other is arranged for routine.
Above-mentioned hydraulic control device makes the rod end chamber of negative curved cylinder 7, upper just curved cylinder 8, lower just curved cylinder 9 and lower negative curved cylinder 10 be provided with back pressure, and the size of back pressure is controlled by pressure-reducing valve 6, when just curved power or negative curved power very little time, the 4th two-position four-way solenoid directional control valve 5 is charged.On just curved cylinder 8 and lower just curved cylinder 9 share a two-position four-way solenoid directional control valve, upper negative curved cylinder 7 and lower negative curved cylinder 10 use independently two-position four-way solenoid directional control valve separately.
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 flows out from the A1 mouth of the first servo valve 1 the P2 hydraulic fluid port flowing to the first two-position four-way solenoid directional control valve 2 again, the plunger shaft of upper just curved cylinder 8 and lower just curved cylinder 9 is entered again from the A2 hydraulic fluid port of the first two-position four-way solenoid directional control valve 2, the pressure that actual bending roller force size equals roll-bending cylinder plunger shaft deducts the pressure of rod end chamber, when positive bending roller force is very little, the 4th two-position four-way solenoid directional control valve 5 is charged.
When needing negative bending roller force in the operation of rolling, P1 to the B1 of the first servo valve 1, A1 to T1 mouth is connected, pressure oil flows out from the B1 mouth of the first servo valve 1 and flows to the P3 hydraulic fluid port of the second two-position four-way solenoid directional control valve 3 and the P4 hydraulic fluid port of the 3rd two-position four-way solenoid directional control valve 4 more respectively, the plunger shaft of negative curved cylinder 7 and lower negative curved cylinder 10 is entered again from the A3 hydraulic fluid port of the second two-position four-way solenoid directional control valve 3 and the A4 mouth of the 3rd two-position four-way solenoid directional control valve 4, the pressure that actual bending roller force size equals roll-bending cylinder plunger shaft deducts the pressure of rod end chamber, when negative bending roller force is very little, 4th two-position four-way solenoid directional control valve 5 is charged.
When not needing bending roller force or roll change, the piston rod of all curved cylinders all must be retracted into reset condition.Now, first servo valve 1 is in the middle working position of valve, the i.e. P1 of the first servo valve 1, A1, B1, T1 mouth is all in closed condition, first two-position four-way solenoid directional control valve 2, second two-position four-way solenoid directional control valve 3, 3rd two-position four-way solenoid directional control valve 4 and the 4th two-position four-way solenoid directional control valve 5 all charged, 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, the rod end chamber of all curved cylinders is entered again 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, piston rod is retracted into reset condition under pressure-reducing valve 6 set condition, now roller replacing operation can be carried out.
Claims (1)
1. the hydraulic control device of a mill roll bending system, described mill roll bending system contains negative curved cylinder (7), on just curved cylinder (8), under just curved cylinder (9) and lower negative curved cylinder (10), described hydraulic control device contains the second oil path block (11), the first two-position four-way solenoid directional control valve (2) is comprised in second oil path block (11), second two-position four-way solenoid directional control valve (3), 3rd two-position four-way solenoid directional control valve (4), 4th two-position four-way solenoid directional control valve (5), pressure-reducing valve (6) and the first servo valve (1), it 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 A2 hydraulic fluid port of the first two-position four-way solenoid directional control valve (2) respectively with the plunger shaft UNICOM of upper just curved cylinder (8) and lower just curved cylinder (9), 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 A3 hydraulic fluid port of the second two-position four-way solenoid directional control valve (3) and the plunger shaft UNICOM of upper negative curved cylinder (7), the A4 hydraulic fluid port of the 3rd two-position four-way solenoid directional control valve (4) and the plunger shaft UNICOM of lower negative curved cylinder (10), the entrance of pressure-reducing valve (6) and oil sources P UNICOM, the outlet of pressure-reducing valve (6) and the P5 hydraulic fluid port UNICOM of the 4th 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 (7) with upper respectively, on just curved cylinder (8), under the rod end chamber UNICOM of just curved cylinder (9) and lower negative curved cylinder (10).
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 mill roll bending system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506870.6A CN104438348B (en) | 2014-09-28 | 2014-09-28 | Hydraulic control device of rolling mill roll bending system |
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| CN104438348A true CN104438348A (en) | 2015-03-25 |
| CN104438348B CN104438348B (en) | 2017-02-08 |
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| CN201410506870.6A Active CN104438348B (en) | 2014-09-28 | 2014-09-28 | Hydraulic control device of rolling mill roll bending system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108393358A (en) * | 2018-05-11 | 2018-08-14 | 中国重型机械研究院股份公司 | A kind of positive and negative roller of six-roll cold mill working roll seamlessly transits system |
| CN112576575A (en) * | 2020-12-16 | 2021-03-30 | 太原理工大学 | Hydraulic pressing system of four-upright-column twenty-high rolling mill |
Citations (7)
| 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 |
| 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 asymmetric roller bending 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 |
-
2014
- 2014-09-28 CN CN201410506870.6A patent/CN104438348B/en active Active
Patent Citations (7)
| 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 |
| 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 asymmetric roller bending 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108393358A (en) * | 2018-05-11 | 2018-08-14 | 中国重型机械研究院股份公司 | A kind of positive and negative roller of six-roll cold mill working roll seamlessly transits system |
| 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 |
| CN112576575A (en) * | 2020-12-16 | 2021-03-30 | 太原理工大学 | Hydraulic pressing system of four-upright-column twenty-high 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 |
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| Publication number | Publication date |
|---|---|
| CN104438348B (en) | 2017-02-08 |
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