CN201665025U - Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press - Google Patents
Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press Download PDFInfo
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- CN201665025U CN201665025U CN2010201540324U CN201020154032U CN201665025U CN 201665025 U CN201665025 U CN 201665025U CN 2010201540324 U CN2010201540324 U CN 2010201540324U CN 201020154032 U CN201020154032 U CN 201020154032U CN 201665025 U CN201665025 U CN 201665025U
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Abstract
The utility model relates to a stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press, comprising a hydraulic cushion cylinder connected to an upper hydraulic cushion and a hydraulic oil pump. The utility model is characterized in that the outlet of the hydraulic oil pump is connected to the inlet of the pressure-reducing valve; the outlet of the pressure-reducing valve is connected to the inlet of a one-way valve; the outlet of the one-way valve is connected to the hydraulic cushion cylinder; the control port of the pressure-reducing valve is connected to the inlet of a proportional valve with digital control; the outlet of the proportional valve is communicated with an oil tank; the inlet of the proportional valve is connected to the control port of a cartridge valve; the inlet of the cartridge valve is connected to the hydraulic cushion cylinder and an accumulator; the outlet of the cartridge valve is connected to the oil tank. The utility model is advantageous in that as an accumulator can provide constant pressure to a hydraulic cushion cylinder, the pressure can be filled by a pressure-reducing valve when the pressure is lower than a set value, and the pressure can be released by a cartridge valve when the pressure is higher than a set value; the stable quality of a processed workpiece can be ensured; the constant pressure control oil-way system is suitable for a hydraulic press.
Description
Technical field
The utility model relates to a kind of hydraulic press, particularly the pressure control device of the last hydraulic die cushion on the hydraulic press.
Background technology
Adopt composite die to be shaped on the hydraulic press and add man-hour, during component shaping, last work step finishes next work step of back and need proceed, for guaranteeing last work step forming effect that has formed and the work of finishing next work step, need to adopt air cushion to keep certain pressure, promptly feed the constant relatively compressed air of pressure in the pairing pneumatic cylinder of air cushion, the pressure that can keep air cushion is constant relatively.Because the fluctuation of air pressure is bigger, therefore, this working method can cause the stability of workpiece processing not enough, and workpiece quality is relatively poor relatively.
The utility model content
The purpose of this utility model provides the stepless adjustable constant voltage control oil piping system of a kind of upper hydraulic cushion on hydraulic machine, makes on the hydraulic die cushion and can produce constant compression force, to process stay-in-grade workpiece.
The purpose of this utility model is achieved in that the stepless adjustable constant voltage control oil piping system of upper hydraulic cushion on hydraulic machine, comprise the hydraulic die cushion cylinder that links to each other with last hydraulic die cushion, hydraulic oil pump, the hydraulic oil delivery side of pump links to each other with the pressure-reducing valve import, the outlet of pressure-reducing valve connects the import of check valve, the outlet of check valve connects the hydraulic die cushion cylinder, the control port of pressure-reducing valve connects the import of proportional dump valve, fuel tank is connected in the outlet of proportional dump valve, the import of proportional dump valve also is connected with the control port of inserted valve, the import of described inserted valve is connected with the hydraulic die cushion cylinder, the import of inserted valve also is connected with accumulator, and the outlet of inserted valve connects fuel tank.
This device adopts the outlet pressure of proportional pressure valve control pressure-reducing valve, that controls inserted valve simultaneously opens valve pressure, make hydraulic oil pump in hydraulic die cushion cylinder and accumulator during fuel feeding, the outlet pressure of pressure-reducing valve is constant, simultaneously, keep inserted valve to be in off state, closed check valve, the pressure of hydraulic die cushion cylinder is provided by accumulator, when last hydraulic die cushion moved, the hydraulic die cushion cylinder provided substantially invariable pressure compensation in proper range, when the hydraulic die cushion in-cylinder pressure is lower than setting value, by pressure-reducing valve to its fuel feeding, when the hydraulic die cushion in-cylinder pressure was higher than setting value, inserted valve was opened, to tank drainback, when the hydraulic die cushion in-cylinder pressure reached setting value, inserted valve was closed.Compared with prior art, the utility model can provide than pneumatic control system more constant compression force guaranteed the steady quality of the workpiece that processes to the hydraulic die cushion cylinder.This device can guarantee that the operating pressure in the hydraulic die cushion cylinder is stepless adjustable, can provide constant operating pressure after the adjustment, and it uses this system reliably, but the hydraulic oil pump intermittent duty, and energy consumption is low.The utility model is adapted at using on the hydraulic press, can guarantee to be in all the time when the hydraulic die cushion cylinder ejects pressure constant state.
During too high or check valve spool jam, is protection pressure-reducing valve and proportional dump valve when the outlet pressure of hydraulic oil pump, can bypass be connected with safety valve between described pressure-reducing valve outlet and check valve inlet.Safety valve can with protection pressure-reducing valve and proportional dump valve, avoid pressure wherein to adjust the element excessive deformation to the fuel tank loop, causes damaging.
Because the effect of pipe throttle, the oil of the control port of inserted valve may not in time flow away, and influences the response speed of inserted valve, described inserted valve control port can be connected the import of overflow valve, and the overflow valve outlet links to each other with the outlet of inserted valve.Because the straight-through fuel tank of the outlet of inserted valve, overflow valve is near the inserted valve setting, and is excessive at the hydraulic die cushion in-cylinder pressure, when causing inserted valve to be opened, overflow valve can be in time with the oil of the control port of inserted valve to tank drainback, can improve the response speed of inserted valve.
Description of drawings
Fig. 1 is the utility model fundamental diagram.
Wherein, 1 hydraulic die cushion cylinder, 2 check valves, 3 pressure-reducing valves, 4 hydraulic oil pumps, 5 safety valves, 6 overflow valves, 7 proportional dump valves, 8 inserted valves, 9 accumulators, T fuel tank, BP Pressure gauge.
The specific embodiment
As shown in the figure, fundamental diagram for the stepless adjustable constant voltage control oil piping system of upper hydraulic cushion on hydraulic machine, this system comprises the hydraulic die cushion cylinder 1 that links to each other with last hydraulic die cushion and hydraulic oil pump 4 etc., the outlet of hydraulic oil pump 4 links to each other with pressure-reducing valve 3 imports, the outlet of pressure-reducing valve 3 connects the import of check valve 2, the outlet of check valve 2 connects hydraulic die cushion cylinder 1, the control port of pressure-reducing valve 3 connects the import of proportional dump valve 7, fuel tank T is connected in the outlet of proportional dump valve 7, the import of proportional dump valve 7 also is connected with the control port of inserted valve 8, the import of inserted valve 8 is connected with hydraulic die cushion cylinder 1, the import of inserted valve 8 also is connected with accumulator 9, the outlet one tunnel of inserted valve 8 directly connects fuel tank T, and another road connects the outlet of overflow valve 6, and the import of overflow valve 6 connects the control port of inserted valve 8; Bypass is connected with safety valve 5 between pressure-reducing valve 3 outlets and check valve 2 imports; Also be connected with Pressure gauge BP on the pipeline between accumulator 9 and inserted valve 8 imports, so that observe operating pressure.
When ejecting, hydraulic die cushion cylinder 1 is in pressure constant state all the time, constant voltage is provided by accumulator 9, proportional dump valve 7 is controlled the opening and closing of pressure-reducing valve 3 and inserted valve 8 simultaneously, when hydraulic die cushion cylinder 1 pressure is lower than setting value, pressure-reducing valve 3 is opened, and gives system's ftercompction, when hydraulic die cushion cylinder 1 pressure is higher than setting value, inserted valve 8 is opened the accumulator release pressure.Can guarantee that operating pressure is constant in the hydraulic die cushion cylinder.
Claims (3)
1. the stepless adjustable constant voltage of upper hydraulic cushion on hydraulic machine is controlled oil piping system, comprise the hydraulic die cushion cylinder that links to each other with last hydraulic die cushion, it is characterized in that: also include hydraulic oil pump, the hydraulic oil delivery side of pump links to each other with the pressure-reducing valve import, the outlet of pressure-reducing valve connects the import of check valve, the outlet of check valve connects the hydraulic die cushion cylinder, the control port of pressure-reducing valve connects the import of proportional dump valve, fuel tank is connected in the outlet of proportional dump valve, the import of proportional dump valve also is connected with the control port of inserted valve, the import of described inserted valve is connected with the hydraulic die cushion cylinder, and the import of inserted valve also is connected with accumulator, and the outlet of inserted valve connects fuel tank.
2. the stepless adjustable constant voltage control oil piping system of upper hydraulic cushion on hydraulic machine according to claim 1, it is characterized in that: bypass is connected with safety valve between described pressure-reducing valve outlet and the check valve inlet.
3. the stepless adjustable constant voltage control oil piping system of upper hydraulic cushion on hydraulic machine according to claim 1, it is characterized in that: the outlet of described inserted valve connects the outlet of overflow valve, and the import of overflow valve connects the control port of inserted valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201540324U CN201665025U (en) | 2010-04-09 | 2010-04-09 | Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201540324U CN201665025U (en) | 2010-04-09 | 2010-04-09 | Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201665025U true CN201665025U (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201540324U Expired - Fee Related CN201665025U (en) | 2010-04-09 | 2010-04-09 | Stepless adjustable constant pressure control oil-way system for upper hydraulic cushion of hydraulic press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201665025U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319789A (en) * | 2011-10-14 | 2012-01-18 | 天津市天锻压力机有限公司 | Multi-hydraulic cushion control system for longitudinal beam hydraulic press |
| CN102672057A (en) * | 2012-06-04 | 2012-09-19 | 昆山市三众模具制造有限公司 | Pressure system of hydraulic mould |
| CN102962972A (en) * | 2012-11-16 | 2013-03-13 | 宁波华美达机械制造有限公司 | Hydraulic system of injection molding machine with servo pump |
| CN106903920A (en) * | 2017-04-07 | 2017-06-30 | 江苏中海重型机床有限公司 | A kind of bender with buffer protection function |
| CN108424336A (en) * | 2017-12-13 | 2018-08-21 | 北京航空航天大学 | A kind of automatic three-stage constant pressure spiral shell pressing molding device for unloading medicine |
| CN108638568A (en) * | 2018-04-25 | 2018-10-12 | 天津市天锻压力机有限公司 | A kind of energy-conserving hydraulic for hydraulic press pads control system |
| CN111623055A (en) * | 2020-06-24 | 2020-09-04 | 北京争先甲电力科技开发有限公司 | Tensioner brake caliper type brake device |
| WO2022134108A1 (en) * | 2020-12-25 | 2022-06-30 | 佛山市康思达液压机械有限公司 | Hydraulic oil path system and hydraulic machine |
| CN115807793A (en) * | 2023-02-09 | 2023-03-17 | 泰州海陵液压机械股份有限公司 | Hydraulic mechanism capable of adjusting constant pressure and working method |
-
2010
- 2010-04-09 CN CN2010201540324U patent/CN201665025U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319789A (en) * | 2011-10-14 | 2012-01-18 | 天津市天锻压力机有限公司 | Multi-hydraulic cushion control system for longitudinal beam hydraulic press |
| CN102672057A (en) * | 2012-06-04 | 2012-09-19 | 昆山市三众模具制造有限公司 | Pressure system of hydraulic mould |
| CN102672057B (en) * | 2012-06-04 | 2015-03-25 | 昆山三众汽车部件制造有限公司 | Pressure system of hydraulic mould |
| CN102962972A (en) * | 2012-11-16 | 2013-03-13 | 宁波华美达机械制造有限公司 | Hydraulic system of injection molding machine with servo pump |
| CN102962972B (en) * | 2012-11-16 | 2015-06-17 | 宁波华美达机械制造有限公司 | Hydraulic system of injection molding machine with servo pump |
| CN106903920A (en) * | 2017-04-07 | 2017-06-30 | 江苏中海重型机床有限公司 | A kind of bender with buffer protection function |
| CN108424336A (en) * | 2017-12-13 | 2018-08-21 | 北京航空航天大学 | A kind of automatic three-stage constant pressure spiral shell pressing molding device for unloading medicine |
| CN108424336B (en) * | 2017-12-13 | 2020-07-14 | 北京航空航天大学 | Automatic unload syllogic constant pressure screw pressure forming device of medicine |
| CN108638568A (en) * | 2018-04-25 | 2018-10-12 | 天津市天锻压力机有限公司 | A kind of energy-conserving hydraulic for hydraulic press pads control system |
| CN108638568B (en) * | 2018-04-25 | 2021-06-08 | 天津市天锻压力机有限公司 | Energy-saving hydraulic cushion control system for hydraulic machine |
| CN111623055A (en) * | 2020-06-24 | 2020-09-04 | 北京争先甲电力科技开发有限公司 | Tensioner brake caliper type brake device |
| WO2022134108A1 (en) * | 2020-12-25 | 2022-06-30 | 佛山市康思达液压机械有限公司 | Hydraulic oil path system and hydraulic machine |
| CN115807793A (en) * | 2023-02-09 | 2023-03-17 | 泰州海陵液压机械股份有限公司 | Hydraulic mechanism capable of adjusting constant pressure and working method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20170409 |