CN2640748Y - Precision cnotroller for stretching edge force of hydraulic - Google Patents
Precision cnotroller for stretching edge force of hydraulic Download PDFInfo
- Publication number
- CN2640748Y CN2640748Y CN 03258176 CN03258176U CN2640748Y CN 2640748 Y CN2640748 Y CN 2640748Y CN 03258176 CN03258176 CN 03258176 CN 03258176 U CN03258176 U CN 03258176U CN 2640748 Y CN2640748 Y CN 2640748Y
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- CN
- China
- Prior art keywords
- valve
- hydraulic
- connects
- oil
- die cushion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a precise controlling device for stretched holder pressure of hydropresses. The utility model is characterized in that a multipoint digital shaking grating displacement transducer controlled by a PLC, as well as a hydraulic controller controlling the push-out of the hydro cylinder and the movement of the hydraulic cushion hydro cylinder are arranged on the wall of lower separator central hole which is arranged on one side of an elevator hydraulic cushion; wherein, the elevator hydraulic cushion is arranged in the lower separator central hole of the hydropress. The utility model solves the challenge that the holder pressure varies with strokes in the stretch process and further enhances the tensile properties of workpieces.
Description
Technical field
The utility model relates to a kind of hydraulic press of plate being processed with drawing process, especially a kind of hydraulic press stretching pressure-pad-force accurate control device.
Background technology
In the metal stretching process, its forming force and pressure-pad-force change with the variation of stretching travel.If pressure-pad-force is inappropriate, will makes material lose stable state, thereby make some position of workpiece that the fold phenomenon will take place.
The pressure-pad-force of traditional hydraulic press generally is a fixed value, and its size is often rule of thumb chosen or adjust through examination stretching several times definite, and this not only bothers but also can not satisfy the needs that pressure-pad-force changes in the drawing and forming process.
Summary of the invention
The utility model provides a kind of hydraulic press stretching pressure-pad-force accurate control device that pressure-pad-force changes in the drawing and forming process that is suitable for for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of hydraulic press stretching pressure-pad-force accurate control device, forms by the hydraulic control device that oil cylinder and hydraulic die cushion oil cylinder and control eject oil cylinder and the motion of hydraulic die cushion oil cylinder that ejects that is installed in liftable hydraulic die cushion in the hydraulic press sill centre bore, is installed in the hydraulic die cushion lower end, the grating displacement transducer of the multiple spot digital display of being controlled by PLC is installed on the sill center bore inner wall of described hydraulic die cushion one side.
The utility model can also adopt following technical measures:
Described hydraulic control device is: main pump comes oil to connect check valve and safety valve cavity of resorption, the safety valve epicoele connects oil sump tank, the check valve epicoele connects the reversal valve epicoele, the reversal valve cavity of resorption connects commutation choke valve cavity of resorption, commutation choke valve epicoele connects oil sump tank, the reversal valve epicoele connects by the overflow valve cavity of resorption of proportional pressure valve and Solenoid ball valve control and one-way throttle valve upper end and ejects oil cylinder, the overflow valve epicoele connects oil sump tank, the one-way throttle valve lower end connects hydraulic die cushion oil cylinder and hydraulic control one-way valve, the oil return opening of hydraulic control one-way valve connects oil sump tank, the control end of hydraulic control one-way valve connects the solenoid directional control valve of control pump oil, and the oil return opening of solenoid directional control valve connects oil sump tank; Described one-way throttle valve upper end also is equipped with pressure sensor and Pressure gauge.
Described check valve, safety valve, commutation choke valve, reversal valve, overflow valve are cartridge-type valve.
Advantage and the good effect that the utlity model has are: because the grating displacement transducer of the multiple spot digital display of being controlled by PLC is installed on the hydraulic press sill center bore inner wall of lifting hydraulic die cushion one side, by the proportional pressure valve in the hydraulic means size of pressure-pad-force (hydraulic die cushion power) can be set accurately in the drawing and forming process, thereby make the forming force change curve of the workpiece that is stretched comparatively level and smooth, be very beneficial for extension, the flow of material.In addition, the check valve in the hydraulic means, safety valve, commutation choke valve, reversal valve, overflow valve are cartridge-type valve, install, overhaul, change easily.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the liftable hydraulic die cushion 3 that has hydraulic die cushion oil cylinder 4 and eject oil cylinder 5 is installed in the centre bore of sill 1.In order to control the variation of hydraulic die cushion pressure-pad-force (hydraulic die cushion power) size in drawing process, on the sidewall of the centre bore of sill 1, the side of corresponding hydraulic die cushion 3, total travel multiple spot grating displacement transducer 2 by PLC control is installed, can make hydraulic die cushion 3 like this when running to each correspondence position, all can have a sender point to pass to PLC.What control the hydraulic die cushion oil cylinder and eject the oil cylinder operation is a hydraulic control device, and its each valve syndeton is as follows:
Main pump comes oil 14 to connect the cavity of resorption of safety valve 13 and check valve 12, the epicoele of safety valve 13 is communicated with oil sump tank, the epicoele of check valve 12 connects the epicoele of reversal valve 16, the cavity of resorption of reversal valve 16 connects the cavity of resorption of commutation choke valve 15, the epicoele of commutation choke valve 15 is communicated with oil sump tank, the epicoele of reversal valve 16 connects the cavity of resorption of overflow valve 17 and ejects the cavity of resorption of oil cylinder 5, and the epicoele of overflow valve 17 is communicated with oil sump tank, and the cavity of resorption that ejects oil cylinder 5 also is connected with pressure sensor 18 and Pressure gauge 19; Give hydraulic die cushion oil cylinder 4 for minute a part of pressure oil, is connected an one-way throttle valve 9 between the cavity of resorption of cavity of resorption that ejects oil cylinder 5 and hydraulic die cushion oil cylinder 4, the cavity of resorption of hydraulic die cushion oil cylinder 4 also connects hydraulic control one-way valve 8, so as during rise to hydraulic die cushion oil cylinder fuel feeding.The control end of hydraulic control one-way valve 8 connects solenoid directional control valve 7 and control pump comes oil 6, and the oil return opening of solenoid directional control valve 7 and hydraulic control one-way valve 8 all is communicated with oil sump tank.Described check valve 12, safety valve 13, commutation choke valve 15, reversal valve 16, overflow valve 17 are cartridge-type valve, and this helps installing, overhauls and changes.
Operating principle:
Main pump comes oil to open check valve 12, and by reversal valve 15, most of pressure oil enters hydraulic die cushion and ejects oil cylinder 5, and small part pressure oil enters two hydraulic die cushion oil cylinders 4 by one-way throttle valve 9, and this moment, hydraulic die cushion 3 was by jack-up.Because the throttling of one-way throttle valve 9, pressure oil seldom enters hydraulic die cushion oil cylinder 4, and then hydraulic control one-way valve 8 passive opens are to hydraulic die cushion oil cylinder 4 fuel feeding.
When hydraulic die cushion 3 is descending, the fluid that ejects oil cylinder and hydraulic die cushion oil cylinder is by overflow valve 17 oil extractions, its pressure is by proportioning valve 10 and Solenoid ball valve 11 controls, grating displacement transducer 2 at hydraulic press sill 1 center bore inner wall by the multiple spot digital display of PLC control, to hydraulic die cushion 3 one by one to the sender point should be arranged, corresponding each sender point, proportioning valve 10 has different current values, make hydraulic die cushion 3 produce different (setting in advance) pressure-pad-forces, thereby can obtain the good tensioning member of quality.
When not needing hydraulic die cushion power (pressure-pad-force), electromagnet YA52, YA53 energising, hydraulic control one-way valve 8 controlled pumps come oil 6 to open, the pressure oil of hydraulic die cushion oil cylinder 4 flows back to fuel tank through the oil return opening of hydraulic control one-way valve 8, and the pressure oil that ejects oil cylinder 5 flows back to fuel tank through reversal valve 16 and commutation choke valve 15.
Claims (3)
1. hydraulic press stretching pressure-pad-force accurate control device, forms by the hydraulic control device that oil cylinder and hydraulic die cushion oil cylinder and control eject oil cylinder and the motion of hydraulic die cushion oil cylinder that ejects that is installed in liftable hydraulic die cushion in the hydraulic press sill centre bore, is installed in the hydraulic die cushion lower end, it is characterized in that: the grating displacement transducer that the multiple spot digital display of being controlled by PLC is installed on the sill center bore inner wall of described hydraulic die cushion one side.
2. hydraulic press stretching pressure-pad-force accurate control device according to claim 1, it is characterized in that: described hydraulic control device is: main pump comes oil to connect check valve and safety valve cavity of resorption, the safety valve epicoele connects oil sump tank, the check valve epicoele connects the reversal valve epicoele, the reversal valve cavity of resorption connects commutation choke valve cavity of resorption, commutation choke valve epicoele connects oil sump tank, the reversal valve epicoele connects by the overflow valve cavity of resorption of proportional pressure valve and Solenoid ball valve control and one-way throttle valve upper end and ejects oil cylinder, the overflow valve epicoele connects oil sump tank, the one-way throttle valve lower end connects hydraulic die cushion oil cylinder and hydraulic control one-way valve, the oil return opening of hydraulic control one-way valve connects oil sump tank, the control end of hydraulic control one-way valve connects the solenoid directional control valve of control pump oil, and the oil return opening of solenoid directional control valve connects oil sump tank; Described one-way throttle valve upper end also is equipped with pressure sensor and Pressure gauge.
3. hydraulic press stretching pressure-pad-force accurate control device according to claim 2, it is characterized in that: described check valve, safety valve, commutation choke valve, reversal valve, overflow valve are cartridge-type valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03258176 CN2640748Y (en) | 2003-07-31 | 2003-07-31 | Precision cnotroller for stretching edge force of hydraulic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03258176 CN2640748Y (en) | 2003-07-31 | 2003-07-31 | Precision cnotroller for stretching edge force of hydraulic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2640748Y true CN2640748Y (en) | 2004-09-15 |
Family
ID=34295698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03258176 Expired - Fee Related CN2640748Y (en) | 2003-07-31 | 2003-07-31 | Precision cnotroller for stretching edge force of hydraulic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2640748Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205663A (en) * | 2011-03-14 | 2011-10-05 | 南通锻压设备股份有限公司 | Numerically-controlled multi-point side-pressing frame hydraulic machine |
-
2003
- 2003-07-31 CN CN 03258176 patent/CN2640748Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205663A (en) * | 2011-03-14 | 2011-10-05 | 南通锻压设备股份有限公司 | Numerically-controlled multi-point side-pressing frame hydraulic machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |