CN2780374Y - Control system of strip steel automatic centering device - Google Patents
Control system of strip steel automatic centering device Download PDFInfo
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- CN2780374Y CN2780374Y CN 200520040503 CN200520040503U CN2780374Y CN 2780374 Y CN2780374 Y CN 2780374Y CN 200520040503 CN200520040503 CN 200520040503 CN 200520040503 U CN200520040503 U CN 200520040503U CN 2780374 Y CN2780374 Y CN 2780374Y
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Abstract
The utility model provides a novel control system of an automatic centering device of strip steel, which comprises a programmable controller (PLC), a first electromagnetic reversing valve, a second electromagnetic reversing valve, an oil inlet pipe, an oil return pipe, an upper oil pipe, a lower oil pipe, a hydraulic lock, a first overflow valve, a second overflow valve, a third overflow valve, and a hydraulic motor, wherein the PLC controls the gained and lost electricity of the first electromagnetic reversing valve and of the second electromagnetic reversing valve; the first electromagnetic reversing valve controls the oil inlet pipe to conduct the upper oil pipe or the lower oil pipe, and consequently the rotation direction of the hydraulic motor is controlled; the second electromagnetic reversing valve controls the oil input pressure of the hydraulic motor, and consequently controls the centering device to generate different centering clamping force. The utility model satisfies the centering clamping force requirements of strip steel of different thickness ranges, and consequently the production defect rate is reduced and the production efficiency is raised.
Description
Technical field
The utility model relates to iron and steel pressure processing machinery apparatus control system field, the particularly control system of the automatic centring device of cold rolled strip steel production unit.
Background technology
In the cold rolling mill of iron and steel enterprise, much be with steel to produce in the unit and all will use centralising device, so that the band steel on the production line is avoided the ratio of defects of bringing because of the deflection of band steel location welding, at first carrying out centering before the operation such as processing.
Fig. 1 is a kind of schematic diagram of existing band steel automatic centring device.Existing centralising device is mainly by control system 100a, screw mandrel 200a, left side guide 300a and right side guide plate 400a, and the spacing 600a composition of spacing 500a in left side and right side.When band steel centering, control system 100a output torque is rotated screw mandrel 200a, thereby drive left side guide 300a and right side guide plate 400a draw close to the band steel respectively, in case after left limit 500a and right limit 600a sensed the band steel, centering was finished.In this process, centralising device is provided by control system 100a the clamping force of band steel.
The control system 100a of above-mentioned existing centralising device as shown in Figure 2, when centering, PLC (figure does not show) gets the electromagnet 11a of solenoid directional control valve 1a (for example three-position four-way valve), this moment, oil inlet pipe 2a connected with the last oil pipe 4a that hydraulic motor 3a is just being changeed, because the branch line 41a of last oil pipe 4a is provided with overflow valve 5a, its setting pressure is 8Mpa, so the pressure of going up on the oil pipe 4a is 8Mpa by this overflow valve 5a setting.Solenoid directional control valve 1a control this moment hydraulic motor 3a just changes, and hydraulic motor 3a drives ball screw 200a, drives left side guide 300a and right side guide plate 400a and closes up, and makes band steel centering.After the left limit 500a on the flipper guide of the right and left and right limit 600a sensed the band steel, centering was finished.Afterwards, the electromagnet 12a of PLC notice solenoid directional control valve 1a gets electric, and this moment, hydraulic pressure chamber 2a connected with the following oil pipe 6a that makes hydraulic motor 3a counter-rotating, and the pressure on the following oil pipe 6a is set up by the overflow valve 7a on its branch line 61a.Hydraulic motor 3a drives ball screw 200a, drives left side guide 300a and right side guide plate 400a and opens.After two flipper guides were got back to initial position, electromagnet 11a, the 12a that PLC makes solenoid directional control valve 1a all must not electricity, and spool is got back to the meta state, oil inlet pipe 2a and last oil pipe 4a and not conductings of following oil pipe 6a, and hydraulic lock 8a closes, whole centering process end.
Because falling with the pressure on being added in hydraulic motor, the output torque of hydraulic motor 3a is directly proportional, therefore, determined the output torque of hydraulic motor by the input pressure of overflow valve 5a control, because the setting pressure of overflow valve 5a fixes, so the output torque of hydraulic motor is constant.That is to say, above-mentioned centering control system can only provide one fixing to medium velocity, promptly centralising device provides a fixing centering clamping force to the band steel.But in practical operation, fixing centering clamping force is difficult to satisfy the band steel demand of different-thickness.For example, if make fixing centering clamping force be fit to the above thicker band steel centering of 4.5mm, the centering that just is difficult to satisfy the following thin material of 2.5mm causes the band steel to arch upward, and causes that the band steel misplaces in the commissure, thus the normal welding of influence.Otherwise if the centering clamping force is turned down to have satisfied the production of thin material, the required centering force of then thick material just may be not enough, thereby can't centering.In this case, operating personnel have to carry out manual adjustments or again centering satisfy welding requirements, influenced the ordinary production rhythm of welding machine and the welding quality of weld seam, hindered the production capacity performance of unit.
Summary of the invention
Therefore, the purpose of this utility model provides a kind of control system with the steel automatic centring device, so that centralising device provides transformable centering clamping force, satisfies the band steel demand of different-thickness simultaneously, thereby reduces the steel defect rate, enhances productivity.
For achieving the above object, the utility model provides a kind of control system with the steel automatic centring device, and it is controlled by Programmable Logic Controller (PLC), comprising: fluid pressure line, and it comprises oil inlet pipe, oil return pipe, goes up oil pipe and following oil pipe; First solenoid directional control valve, it is positioned at the oil inlet pipe input, and is electrically connected on PLC, makes oil pipe or following oil pipe in the conducting of position reaction control oil inlet pipe thereby be used to receive from the signal of telecommunication of PLC; Hydraulic lock, it is connected in described fluid pressure line, is used for when first solenoid directional control valve described pipeline of locking during at meta; Hydraulic motor, it is connected with upper and lower oil pipe, and is just changeing during oil pipe in the oil inlet pipe conducting and reverse during oil pipe under the oil inlet pipe conducting; First overflow valve, it is positioned at the oil pipe side, is used to provide the input pressure that hydraulic motor is just being changeed; Second overflow valve, it is positioned at oil pipe side down, is used to provide the input pressure that makes the hydraulic motor counter-rotating; Wherein, also comprise: second solenoid directional control valve, it is electrically connected on PLC, is used for the signal of telecommunication from PLC is made position reaction; The 3rd overflow valve, it is positioned at the oil pipe side, connect with second solenoid directional control valve back and the first overflow valve parallel connection, and be controlled by second solenoid directional control valve, to select to provide the input pressure that is different from first input pressure that overflow valve is supplied.
Preferably, preferable, the setting pressure of described first overflow valve is 8Mpa; The setting pressure of second overflow valve is 4Mpa; The setting pressure of described the 3rd overflow valve is 4Mpa.
Preferable, described system also comprises the 4th overflow valve, it is parallel to the 3rd overflow valve, to select to provide the input pressure that is different from the first and the 3rd input pressure that overflow valve is supplied.
Because the utility model provides at least two kinds of alternative different input pressures, therefore controlling centralising device has produced different centering clamping forces, satisfy the demand of the required centering clamping force of different-thickness scope band steel, thereby reduced the production ratio of defects, improved production efficiency.
Description of drawings
Fig. 1 is a kind of schematic diagram of existing band steel centralising device;
Fig. 2 is the control system schematic diagram of existing band steel automatic centring device;
Fig. 3 is the schematic diagram of the utility model control system;
Fig. 4 is the control flow chart of the utility model control system.
The specific embodiment
For helping to understand the utility model, the utility model is done further detailed elaboration below in conjunction with relevant drawings.
See also Fig. 3, the utility model provides a kind of new control system with the steel automatic centring device, this system 100 is controlled by Programmable Logic Controller (PLC, figure do not show), promptly by the bi-bit bi-pass solenoid directional control valve 1 of this PLC control system 100 and 3-position 4-way solenoid directional control valve 2 electric and dead electricity; System 100 also comprises the fluid pressure line of being made up of last oil pipe 3 and branched pipe 31, branched pipe 32, following oil pipe 4 and branched pipe 41, oil return pipe 5 and oil inlet pipe 6, hydraulic lock 7, first overflow valve 8, second overflow valve 9, the 3rd overflow valve 10 and hydraulic motor 11.Be subjected to the control of solenoid directional control valve 2, but oil pipe 3 in oil inlet pipe 6 conductings, make the oil inlet pipe of oil pipe 3 as hydraulic motor 11, at this moment, be positioned at first overflow valve 8 and the 3rd overflow valve 9 alternative input pressures of going up oil pipe 3 of controlling separately on the oil pipe 3, with the output torque that control hydraulic motor 11 is just changeing, in this case, following oil pipe 4 is communicated with oil return pipe 5 as the return line of hydraulic motor 11; Be subjected to the control of solenoid directional control valve 2, but oil inlet pipe 6 is oil pipe 4 under the conducting also, make down the oil inlet pipe of oil pipe 4 as hydraulic motor 11, at this moment, second overflow valve, 9 controls under being positioned on the oil pipe 4 are the input pressure of oil pipe 4 down, with the output torque of control hydraulic motor 11 counter-rotatings, in this case, last oil pipe 3 is communicated with oil return pipe 5 as the return line of hydraulic motor 11; And when solenoid directional control valve 2 mediates, oil inlet pipe 6 and last oil pipe 3 and following oil pipe 4 not conductings, at this moment, hydraulic lock 7 is in blocking owing to the pressure that has lost from oil inlet pipe 6, thereby makes the not conducting of whole fluid pressure line.
Again referring to Fig. 3, because the utility model control system has increased by the 3rd overflow valve on oil pipe on the hydraulic motor 3, adopt the first and the 3rd overflow valve parallel connection, and be set with high and low two different force value with the 3 two overflow valve with first, as, the force value of first overflow valve is adjusted to 8Mpa, and the force value of the 3rd overflow valve is adjusted to 4Mpa, and above the 3rd lower overflow valve of force value, increased the bi-bit bi-pass reversal valve, thereby realize the switching of height pressure.
See also Fig. 4 and in conjunction with Fig. 3, in case the band steel enters into centralising device, the thickness information of band steel promptly is transfused to PLC, if thickness less than 4.5mm, PLC at first make two-position two-way solenoid valve 1 electric, the 3rd overflow valve 10 conductings this moment.Then, PLC makes the electromagnet 21 of three position four-way electromagnetic valve 2 get again, at this moment, connected with the last oil pipe 3 that hydraulic motor 11 is just being changeed by the oil inlet pipe 6 of magnetic valve 2 controls, be respectively equipped with the 3rd overflow valve 10 and first overflow valve 8 on the branch line 31 and 32 in parallel, because the magnetic valve 1 that be positioned on the branch line 31 this moment is in conduction position, so the pressure on the last oil pipe 3 is by lower the 3rd overflow valve 10 decisions of set pressure value, be 4Mpa, promptly first overflow valve 8 cuts out and 10 conductings of the 3rd overflow valve, thereby make 3-position 4-way solenoid directional control valve 2 control hydraulic motors 11 just change, drive centralising device and be with steel centering.
In case centering is finished, PLC will notify the electromagnet 22 of solenoid directional control valve 2 to get, this moment, oil inlet pipe 6 was connected with the following oil pipe 4 of controlling hydraulic motor 11 counter-rotatings, and the pressure on the following oil pipe 4 is set up by second overflow valve 9, carried out the centering expansion thereby make hydraulic motor 11 drive centralising device; After turning back to initial position, the electromagnet 21 and 22 that PLC makes 3-position 4-way solenoid directional control valve 2 all must not electricity, and the spool of solenoid directional control valve 2 is got back to the centre position, oil inlet pipe 6 and last oil pipe 3 and following oil pipe 4 not conductings, hydraulic lock 2 is closed, and whole centering operating process finishes.
At the band steel when entering centralising device, if the thickness of band steel greater than 4.5mm, PLC at first just allows two-position two-way solenoid valve 1 dead electricity, this moment, overflow valve 10 was closed.Then, the electromagnet 22 of PLC notice three position four-way electromagnetic valve 2, this moment, oil inlet pipe 6 was connected with the last oil pipe 3 that hydraulic motor 11 is just being changeed, though be respectively equipped with first overflow valve 8 and the 3rd overflow valve 10 on the branch line in parallel, but because this moment, magnetic valve 1 was in detent position, the 3rd overflow valve 10 is inoperative, so the pressure on the last oil pipe 3 is 8Mpa by 8 decisions of first overflow valve.This moment, 3-position 4-way solenoid directional control valve 2 control hydraulic motors 11 just changeed, and drove centralising device and were with steel centering.To drive centralising device by second overflow valve, 9 control hydraulic motors 11 after centering is finished and return original state.
In the foregoing description of the present utility model, the set pressure of each overflow valve can carry out respective change according to actual conditions.If the thickness range broad of the band steel that is used to produce, also can by belt steel thickness will be with steel to be divided three classes or more than, simultaneously on the 3rd overflow valve the in parallel the 4th or multi-overflow valve more, change the bi-bit bi-pass solenoid directional control valve into threeway or above solenoid directional control valve.
The technical staff of the industry should be appreciated that under the prerequisite that does not break away from spirit of the present utility model or principal character, the utility model can be implemented with other specific forms.Here cited example and embodiment only are for full-time instruction the utility model rather than limit it that the utility model is not limited to detailed description provided herein.
Claims (8)
1. control system with the steel automatic centring device, it is controlled by Programmable Logic Controller (PLC), comprising:
Fluid pressure line, it comprises oil inlet pipe, oil return pipe, goes up oil pipe and following oil pipe;
First solenoid directional control valve, it is positioned at the oil inlet pipe input, and is electrically connected on PLC, makes oil pipe or following oil pipe in the conducting of position reaction control oil inlet pipe thereby be used to receive from the signal of telecommunication of PLC;
Hydraulic lock, it is connected in described fluid pressure line, is used for when first solenoid directional control valve described pipeline of locking during at meta;
Hydraulic motor, it is connected with upper and lower oil pipe, and is just changeing during oil pipe in the oil inlet pipe conducting and reverse during oil pipe under the oil inlet pipe conducting;
First overflow valve, it is positioned at the oil pipe side, is used to provide the input pressure that hydraulic motor is just being changeed;
Second overflow valve, it is positioned at oil pipe side down, is used to provide the input pressure that makes the hydraulic motor counter-rotating;
It is characterized in that, also comprise:
Second solenoid directional control valve, it is electrically connected on PLC, is used for the signal of telecommunication from PLC is made position reaction;
The 3rd overflow valve, it is positioned at the oil pipe side, connect with second solenoid directional control valve back and the first overflow valve parallel connection, and be controlled by second solenoid directional control valve, to select to provide the input pressure that is different from first input pressure that overflow valve is supplied.
2. the system as claimed in claim 1 is characterized in that, described first solenoid directional control valve is a three position four-way electromagnetic valve.
3. the system as claimed in claim 1 is characterized in that, described second solenoid directional control valve is a two-position two-way solenoid valve.
4. the system as claimed in claim 1 is characterized in that, described system also comprises the 4th overflow valve, and it is parallel to the 3rd overflow valve, to select to provide the input pressure that is different from the first and the 3rd input pressure that overflow valve is supplied.
5. system as claimed in claim 4 is characterized in that, described second solenoid directional control valve is a two-position three way magnetic valve.
6. as any described system of claim 1-5, it is characterized in that the setting pressure of described first overflow valve is 8Mpa.
7. system as claimed in claim 6 is characterized in that, the setting pressure of described the 3rd overflow valve is 4Mpa.
8. as any described system of claim 1-5, it is characterized in that the setting pressure of described second overflow valve is 4Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040503 CN2780374Y (en) | 2005-03-29 | 2005-03-29 | Control system of strip steel automatic centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040503 CN2780374Y (en) | 2005-03-29 | 2005-03-29 | Control system of strip steel automatic centering device |
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| Publication Number | Publication Date |
|---|---|
| CN2780374Y true CN2780374Y (en) | 2006-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040503 Expired - Fee Related CN2780374Y (en) | 2005-03-29 | 2005-03-29 | Control system of strip steel automatic centering device |
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| CN (1) | CN2780374Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661294B (en) * | 2009-09-03 | 2012-06-13 | 苏州有色金属研究院有限公司 | Self-adaptive fuzzy control method of strip centering system |
| CN102950168A (en) * | 2011-08-23 | 2013-03-06 | 上海宝钢设备检修有限公司 | Automatic centering logic numerical control device of cold-rolled strip steel uncoiler |
| CN103792104A (en) * | 2014-01-24 | 2014-05-14 | 中铁隧道集团有限公司 | Tunnel analog loading experimental platform |
-
2005
- 2005-03-29 CN CN 200520040503 patent/CN2780374Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661294B (en) * | 2009-09-03 | 2012-06-13 | 苏州有色金属研究院有限公司 | Self-adaptive fuzzy control method of strip centering system |
| CN102950168A (en) * | 2011-08-23 | 2013-03-06 | 上海宝钢设备检修有限公司 | Automatic centering logic numerical control device of cold-rolled strip steel uncoiler |
| CN102950168B (en) * | 2011-08-23 | 2014-11-05 | 上海宝钢设备检修有限公司 | Automatic centering logic numerical control device of cold-rolled strip steel uncoiler |
| CN103792104A (en) * | 2014-01-24 | 2014-05-14 | 中铁隧道集团有限公司 | Tunnel analog loading experimental platform |
| CN103792104B (en) * | 2014-01-24 | 2016-10-05 | 中铁隧道集团有限公司 | Tunnels mimic loading experiment platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060517 Termination date: 20140329 |