CN105665475A - Thick plate pressing machine hydraulic system - Google Patents
Thick plate pressing machine hydraulic system Download PDFInfo
- Publication number
- CN105665475A CN105665475A CN201610254545.4A CN201610254545A CN105665475A CN 105665475 A CN105665475 A CN 105665475A CN 201610254545 A CN201610254545 A CN 201610254545A CN 105665475 A CN105665475 A CN 105665475A
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- Prior art keywords
- valve
- cylinder
- directional valve
- pressure oil
- fluid
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a thick plate pressing machine hydraulic system, and belongs to the technical field of thick plate pressing. The thick plate pressing machine hydraulic system is characterized in that during descending of a main oil cylinder, pressure oil can be fed into the main oil cylinder from a pressure oil pipeline P through P and A of a magnetic exchange valve, a hydraulic control one-way valve and a proportional direction valve; oil of a return cylinder flows back to a main oil tank through holes A and T of the magnetic exchange valve, the hydraulic control one-way valve and the proportional direction valve; during return of the main oil cylinder, pressure oil is fed into the return cylinder from the pressure oil pipeline (P) through P and A of the magnetic exchange valve, the hydraulic control one-way valve and the proportional direction valve; oil of the main oil cylinder flows back to the main oil tank from holes A and T of the magnetic exchange valve, the hydraulic control one-way valve and the proportional direction valve. The thick plate pressing machine hydraulic system has the advantages that descending and return speeds of the main hydraulic cylinder can be controlled in a stepless manner, and the working efficiency of a pressing machine can be improved; meanwhile, by controlling the power supply voltage of a proportional magnet of the proportional direction valve, stable release of high pressure inside the main oil cylinder can be achieved, and the problem of pressure impact caused during high pressure release of the main oil cylinder can be solved.
Description
Technical field
The invention belongs to slab flatting mill technical field, it is specifically related to a kind of slab flatting mill hydraulic efficiency system.
Background technology
Slab flatting mill utilizes the pressure of main hydraulic cylinder Plate Steel carries out leveling or bending waits action, is conducive to raising slab quality, optimizes product structure. the slab flatting mill master cylinder hydraulic pressure Controlling System of design both at home and abroad at present, as shown in Figure 1: master cylinder 12.1 band kinetic head quick descending time first pressure oil from pressure oil pipeline P by reducing valve 1.1, prefill valve 10.1 is opened after solenoid operated directional valve 2.1, hydraulic efficiency oil is flowed in master cylinder 12.1 from top petrol tank 9.1, two backhaul cylinders 13.1 simultaneously, fluid in 13.2 is by control cartridge valve 5.1, the electro-magnet Y3 of 4.1, Y1 obtains electric current and returns in main tank 14, the position of master cylinder 12.1 is detected by displacement sensor 11.1, the sender number when master cylinder 12.1 position reaches set(ting)value, solenoid operated directional valve 2.1 electro-magnet Y6 obtains electric, prefill valve 10.1 cuts out, cartridge valve 7.1 electro-magnet Y4 obtains in electric rear pressure oil inflow master cylinder 12.1 simultaneously, now master cylinder 12.1 starts loading and carries out pressing work, after having worked, the electro-magnet Y5 first controlling cartridge valve 8.1 obtains electric, high pressure in release master cylinder 12.1, control cartridge valve 3.1 again, the electro-magnet Y2 of 5.1, Y3 obtains electric and Y6 dead electricity that is solenoid operated directional valve 2.1, the pressure oil in pressure oil pipeline is made to enter into backhaul cylinder 13.1, in 13.2, master cylinder 12.1 is driven to return, fluid in master cylinder 12.1 flows back in top petrol tank 9.1 and main tank 14 by prefill valve 10.1 and cartridge valve 8.1 simultaneously, after master cylinder 9.1 returns starting position, position transducer 11.1 sender, electro-magnet Y1, Y2, Y3, Y5 dead electricity Y6 obtains electric, master cylinder 12.1, backhaul cylinder 13.1, 13.2 stopping action, wait lower task. this hydraulic efficiency system can not realize that master cylinder is descending and the stepless changing of retum speed, can not solve pressure shock problem during master cylinder release high pressure simultaneously, and pipeline vibrations are violent, cannot meet flatting mill safety, production requirement efficiently.
Summary of the invention
It is an object of the invention to as slab flatting mill provides a kind of new hydraulic efficiency system, it is possible to effectively overcome the shortcoming that prior art exists.
The present invention is achieved in that as shown in Figure 2: master cylinder 8.1 band kinetic head quick descending time first pressure oil from pressure oil pipeline P by reducing valve 1.1, the electro-magnet Y1 of solenoid operated directional valve 2.1 obtain electric after open the spool of prefill valve 10.1, hydraulic efficiency oil is flowed in master cylinder 8.1 from top petrol tank 9.1, two backhaul cylinders 7.1 simultaneously, fluid in 7.2 obtains electric by controlling the electro-magnet Y3 of solenoid operated directional valve 2.3, pressure oil is made to open the spool of fluid-control one-way valve 4.4, the fluid in backhaul cylinder is made to flow to the A mouth of proportion directional valve 3.2, by the ratio electro-magnet BY3 of control ratio directional valve 3.2 voltage just can the flow area of control ratio directional valve 3.2 valve core channel A → T, obtain voltage more big, flow area is more big, fluid take-off rate in main hydraulic cylinder 8.1 is more fast, the downstream rate of main hydraulic cylinder 8.1 is more fast, obtain voltage about little, flow area is more little, fluid take-off rate in main hydraulic cylinder 8.1 is more slow, the downstream rate of main hydraulic cylinder 8.1 is more slow, the T mouth of the fluid passing ratio directional valve 3.2 in main hydraulic cylinder 8.1 flows back to fuel tank,The position of master cylinder 8.1 is detected by displacement sensor 6.1, the sender number when master cylinder 8.1 position reaches set(ting)value, solenoid operated directional valve 2.1 electro-magnet Y1 dead electricity, prefill valve 10.1 spool is closed, the electro-magnet Y2 of solenoid operated directional valve 2.2 obtains electric simultaneously, pressure oil is made to open fluid-control one-way valve 4.1, the spool of 4.2, pressure oil flows to the P mouth of proportion directional valve 3.1 from pressure pipeline P through hydraulic pressure control check valve 4.1, again by the ratio electro-magnet BY2 of control ratio directional valve 3.1 voltage, the just flow area of energy control ratio directional valve valve core channel P → A, obtain voltage more big, flow area is more big, the pressure oil in main hydraulic cylinder 8.1 is flowed into more many through hydraulic pressure control check valve 4.2, it is more fast that main hydraulic cylinder 8.1 loads pressing working speed, obtain voltage about little, flow area is more little, the pressure oil in main hydraulic cylinder 8.1 is flowed into more few through hydraulic pressure control check valve 4.2, it is more slow that main hydraulic cylinder 8.1 loads pressing working speed, after pressing work completes, the ratio electro-magnet BY1 of control ratio directional valve 3.1 obtains a small voltage, valve core channel A → the T of proportion directional valve 3.1 is made to have less flow area, high pressure in release master cylinder 8.1, now the valve core channel P → B of proportion directional valve 3.1 shuts, the electro-magnet Y1 controlling solenoid operated directional valve 2.1 again obtains the electric spool opening prefill valve 10.1, the electro-magnet Y3 of solenoid operated directional valve 2.3 obtains electric, pressure oil is made to open fluid-control one-way valve 4.3, the spool of 4.4, pressure oil flows to the P mouth of proportion directional valve 3.2 from pressure pipeline P through fluid-control one-way valve 4.3, again by the ratio electro-magnet BY4 of control ratio directional valve 3.2 voltage just can the flow area of control ratio directional valve 3.2 valve core channel P → A, obtain voltage more big, flow area is more big, flow into backhaul cylinder 7.1, fluid in 7.2 is more many, main hydraulic cylinder 8.1 return rows speed is more fast, obtain voltage about little, flow area is more little, flow into backhaul cylinder 7.1, fluid in 7.2 is more few, the retum speed of main hydraulic cylinder 8.1 is more slow, now the fluid in main hydraulic cylinder 8.1 flows back in top petrol tank 9.1 and main tank 11 by the T mouth of prefill valve 10.1 and proportion directional valve 3.1, after master cylinder 8.1 returns starting position, position transducer 6.1 sender, electro-magnet Y1, Y2, Y3, BY1, BY2, BY3, BY4 dead electricity, master cylinder 8.1, backhaul cylinder 7.1, 7.2 stopping actions, wait lower task.
Advantage of the present invention and positively effect be:
Compare with prior art Fig. 1, adoption rate directional valve 3.1 of the present invention controls the action of master cylinder 8.1, proportion directional valve 3.2 controls the action of backhaul cylinder 7.1,7.2, its benefit is can stepless control main hydraulic cylinder is descending and retum speed, it is to increase the working efficiency of flatting mill; Obtain voltage by the ratio electro-magnet of control ratio directional valve 3.1 simultaneously, just can realize the steady release of master cylinder 8.1 inner high voltage, solve pressure shock problem when master cylinder 8.1 discharges high pressure. Visible, present invention achieves slab flatting mill safety, production requirement efficiently, in addition, present hydraulic system structure is simple, cheap, utilization is reliable.
Accompanying drawing explanation
Fig. 1 is prior art slab flatting mill hydraulic scheme
Fig. 2 is present hydraulic system figure.
In figure
1.1 reducing valve 2.1,2.2,2.3 solenoid operated directional valve 3.1,3.2 proportion directional valve 4.1,4.2,4.3,4.4 fluid-control one-way valve 5.1 surplus valve 6.1 displacement sensor 7.1,7.2 backhaul cylinder 8.1 master cylinder 9.1 top petrol tank 10.1 prefill valve 11 main tank P pressure oil pipelines.
Embodiment
As shown in Figure 2, master cylinder 8.1 band kinetic head quick descending time first pressure oil from pressure oil pipeline P by reducing valve 1.1, the electro-magnet Y1 of solenoid operated directional valve 2.1 obtain electric after open the spool of prefill valve 10.1, hydraulic efficiency oil is flowed in master cylinder 8.1 from top petrol tank 9.1, two backhaul cylinders 7.1 simultaneously, fluid in 7.2 obtains electric by controlling the electro-magnet Y3 of solenoid operated directional valve 2.3, pressure oil is made to open the spool of fluid-control one-way valve 4.4, the fluid in backhaul cylinder is made to flow to the A mouth of proportion directional valve 3.2, by the ratio electro-magnet BY3 of control ratio directional valve 3.2 voltage carrys out the flow area of control ratio directional valve 3.2 valve core channel A → T, the T mouth of the fluid passing ratio directional valve 3.2 in main hydraulic cylinder 8.1 flows back to fuel tank, the position of master cylinder 8.1 is detected by displacement sensor 6.1, the sender number when master cylinder 8.1 position reaches set(ting)value, solenoid operated directional valve 2.1 electro-magnet Y1 dead electricity, prefill valve 10.1 spool is closed, the electro-magnet Y2 of solenoid operated directional valve 2.2 obtains electric simultaneously, pressure oil is made to open fluid-control one-way valve 4.1, the spool of 4.2, pressure oil flows to the P mouth of proportion directional valve 3.1 from pressure pipeline P through hydraulic pressure control check valve 4.1, by the ratio electro-magnet BY2 of control ratio directional valve 3.1 voltage carrys out the flow area of control ratio directional valve valve core channel P → A, pressure oil flows in main hydraulic cylinder 8.1 through hydraulic pressure control check valve 4.2, start to load and flatten work, after pressing work completes, the ratio electro-magnet BY1 of control ratio directional valve 3.1 obtains a small voltage, valve core channel A → the T of proportion directional valve 3.1 is made to have less flow area, high pressure in release master cylinder 8.1, now the valve core channel P → B of proportion directional valve 3.1 shuts, the electro-magnet Y1 controlling solenoid operated directional valve 2.1 again obtains the electric spool opening prefill valve 10.1, the electro-magnet Y3 of solenoid operated directional valve 2.3 obtains electric, pressure oil is made to open fluid-control one-way valve 4.3, the spool of 4.4, pressure oil flows to the P mouth of proportion directional valve 3.2 from pressure pipeline P through fluid-control one-way valve 4.3, again by the ratio electro-magnet BY4 of control ratio directional valve 3.2 voltage carrys out the flow area of control ratio directional valve 3.2 valve core channel P → A, pressure oil is made to flow into backhaul cylinder 7.1, 7.2 in, main hydraulic cylinder 8.1 and backhaul cylinder 7.1, 7.2 return, now the fluid in main hydraulic cylinder 8.1 flows back in top petrol tank 9.1 and main tank 11 by the T mouth of prefill valve 10.1 and proportion directional valve 3.1, after master cylinder 8.1 returns starting position, position transducer 6.1 sender, electro-magnet Y1, Y2, Y3, BY1, BY2, BY3, BY4 dead electricity, master cylinder 8.1, backhaul cylinder 7.1, 7.2 stopping actions, wait lower task.
Claims (1)
1. a slab flatting mill hydraulic efficiency system, when it is characterized in that master cylinder 8.1 is descending, pressure oil enters master cylinder (8.1) from pressure oil pipeline (P) by P, A of solenoid operated directional valve (2.2), fluid-control one-way valve (4.1,4.2), proportion directional valve (3.1), and backhaul cylinder (7.1,7.2) fluid flows back to main tank (11) through A, T mouth of solenoid operated directional valve (2.3), fluid-control one-way valve (4.3,4.4), proportion directional valve (3.2); When master cylinder 8.1 returns, pressure oil enters backhaul cylinder (7.1,7.2) from pressure oil pipeline (P) by P, A of solenoid operated directional valve (2.3), fluid-control one-way valve (4.3,4.4), proportion directional valve (3.2), and the fluid of master cylinder (8.1) flows back to main tank (11) through A, T mouth of solenoid operated directional valve (2.2), fluid-control one-way valve (4.1,4.2), proportion directional valve (3.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610254545.4A CN105665475B (en) | 2016-04-25 | 2016-04-25 | A kind of slab flattens machine hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610254545.4A CN105665475B (en) | 2016-04-25 | 2016-04-25 | A kind of slab flattens machine hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN105665475A true CN105665475A (en) | 2016-06-15 |
| CN105665475B CN105665475B (en) | 2017-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610254545.4A Active CN105665475B (en) | 2016-04-25 | 2016-04-25 | A kind of slab flattens machine hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504020A (en) * | 2017-10-16 | 2017-12-22 | 太原理工大学 | A kind of isothermal die forging process hydraulic system of press |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979205A (en) * | 1995-09-12 | 1997-03-25 | Hitachi Constr Mach Co Ltd | Hydraulic reproducing unit |
| CN1621221A (en) * | 2003-11-24 | 2005-06-01 | 天津市天锻压力机有限公司 | Large-scale double-action hydraulic drawing machine for heavy plate |
| CN101463846A (en) * | 2009-01-13 | 2009-06-24 | 太原科技大学 | Hydraulic system of full-hydraulic metal sheet straightener |
| CN202088514U (en) * | 2011-04-13 | 2011-12-28 | 重庆大学 | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger |
| CN203599448U (en) * | 2013-12-03 | 2014-05-21 | 太原重工股份有限公司 | Hot die forging press sliding block action hydraulic control system |
-
2016
- 2016-04-25 CN CN201610254545.4A patent/CN105665475B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979205A (en) * | 1995-09-12 | 1997-03-25 | Hitachi Constr Mach Co Ltd | Hydraulic reproducing unit |
| CN1621221A (en) * | 2003-11-24 | 2005-06-01 | 天津市天锻压力机有限公司 | Large-scale double-action hydraulic drawing machine for heavy plate |
| CN101463846A (en) * | 2009-01-13 | 2009-06-24 | 太原科技大学 | Hydraulic system of full-hydraulic metal sheet straightener |
| CN202088514U (en) * | 2011-04-13 | 2011-12-28 | 重庆大学 | Hydraulic circuit of large-size hydraulic machine comprising novel supercharger |
| CN203599448U (en) * | 2013-12-03 | 2014-05-21 | 太原重工股份有限公司 | Hot die forging press sliding block action hydraulic control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504020A (en) * | 2017-10-16 | 2017-12-22 | 太原理工大学 | A kind of isothermal die forging process hydraulic system of press |
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| Publication number | Publication date |
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| CN105665475B (en) | 2017-08-15 |
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