CN102168695A - Hydraulic system principle of blanking buffering device of hydraulic press - Google Patents

Hydraulic system principle of blanking buffering device of hydraulic press Download PDF

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Publication number
CN102168695A
CN102168695A CN2011101048697A CN201110104869A CN102168695A CN 102168695 A CN102168695 A CN 102168695A CN 2011101048697 A CN2011101048697 A CN 2011101048697A CN 201110104869 A CN201110104869 A CN 201110104869A CN 102168695 A CN102168695 A CN 102168695A
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CN
China
Prior art keywords
oil
pressure
hydraulic
cushion dashpot
hydraulic press
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Application number
CN2011101048697A
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Chinese (zh)
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CN102168695B (en
Inventor
李金良
侯忠亚
魏新杰
余圣荣
寻宝明
黄锋
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XUZHOU KAIYUAN CENTURY HEAVY FORGING CO Ltd
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XUZHOU KAIYUAN CENTURY HEAVY FORGING CO Ltd
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Priority to CN 201110104869 priority Critical patent/CN102168695B/en
Publication of CN102168695A publication Critical patent/CN102168695A/en
Application granted granted Critical
Publication of CN102168695B publication Critical patent/CN102168695B/en
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Abstract

The invention discloses a hydraulic system principle of a blanking buffering device of a hydraulic press, relating to a hydraulic machine. The hydraulic system consists of common hydraulic elements, at the moment that a steel plate is cut and fractured, and kinetic energy generated by the hydraulic press is absorbed by reaction force generated by a hydraulic buffering system, so that small noise and no shake on the hydraulic press are achieved, and instant smooth transition of steel plate cutting process termination is realized. High-pressure oil output by an oil pump is output in two paths, wherein the path of one path which is a non-work return oil path is that: the high-pressure oil output by the oil pump returns to an oil tank by opening a one-way valve I so as to fulfill the pressure required by plunger lifting of a cushion cylinder; and the path of the other path which is a working oil path is that: the high-pressure oil output by the oil pump enters the cushion cylinder through a one-way valve II and a one-way valve III so as to fulfill the working pressure of the cushion cylinder. According to the working conditions of the hydraulic press and the thickness of the cut steel plate, the two paths of pressure are adjusted by the overflow valve, and indicated by a pressure gauge.

Description

The hydraulic system principle of hydraulic press blanking damping device
Technical field
The present invention relates to a kind of hydraulic machinery, the hydraulic system principle of hydraulic damping device when being specifically related to the hydraulic press blanking.
Background technique
A lot of sheet metal parts need be processed on hydraulic press, utilize blanking die to shear blanking.The powerful shearing force of blanking moment generation causes the hydraulic press fuselage to produce violent rocking, and the vibration of machine tool hydraulic pipe-line system is broken, and seal failure causes leakage.The buffering of using when how to solve blanking has been carried out several different methods in the forging industry.Than blanking buffering technology in period morning, adopt polyurethane or spring as damping, buffering, this method has certain effect, and shortcoming is to use the life-span low, and Applicable scope is little, does not satisfy different-thickness sheet material blanking.Occurred some hydraulic damping devices in recent years, shortcoming is that hydraulic element are many, the Installation and Debugging difficulty, and reliability is bad.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of hydraulic system principle of hydraulic press blanking damping device, adopt hydraulic element commonly used to form, the moment of steel plate shearing fracture, the kinetic energy that hydraulic press produced is absorbed by the reaction force that hydraulic buffer system produces, it is little to reach noise, and hydraulic press does not shake, and realizes shearing the moment smooth transition that the steel plate process stops.
The present invention is achieved through the following technical solutions: a kind of hydraulic system principle of hydraulic press blanking damping device, and electric motor driven oil pump is extracted hydraulic oil out from fuel tank, oil pump output high pressure oil; It is characterized in that: the high pressure oil of described oil pump output has two-way output, and wherein one the tunnel is the no worker oil circuit that refluxes, and high pressure oil is directly got back to fuel tank; Another road is a working oil path, and high pressure oil enters cushion dashpot.
The reflux path of oil circuit of described no worker is: oil pump output high pressure oil is got back to fuel tank through backing down one-way valve I; The reflux hydraulic principle of oil circuit of no worker is: when slider of hydraulic press is in the backhaul top dead center, and solenoid directional control valve I no electric circuit, fluid is in lower pressure, backs down one-way valve I, is back to fuel tank.
The path of described working oil path is: oil pump 3 output high pressure oils are through entering cushion dashpot by one-way valve II and one-way valve III; The hydraulic principle of working oil path is: when solenoid directional control valve I, solenoid directional control valve II switched on, the spool in the shuttle valve was shifted onto the right by left side oil liquid pressure, and the path and the return tube on shuttle valve the right are connected, and fluid flow back into fuel tank; Passage inner fluid pressure enters cushion dashpot by one-way valve II and one-way valve III after setting through relief valve I, and the plunger jack-up of cushion dashpot is arrived top dead center, and this moment, upper limit sensor sender stopped to eject; Fluid pressure is closed between connecting pipeline and the various valve, and the fluid pressure of this moment shows numerical value by pressure gauge.
When slider of hydraulic press drive mould moves downward, be placed with steel plate between the upper and lower mould, when mould touches steel plate, begin to shear blanking; When steel plate thickness was sheared 2/3, the slider of hydraulic press lower plane contacted with the plunger upper-end surface of cushion dashpot, and this moment, the cushion dashpot plunger was in unsteady downstream state; When the cushion dashpot plunger moved downward, the hydraulic oil in the cushion dashpot was extruded, and pressed oil pressure to raise in the cylinder; When the oil pressure in the cushion dashpot was provided with pressure value above relief valve III, the hydraulic oil in the cushion dashpot was back to fuel tank by relief valve III, to avoid detonation.
Another oil circuit that is connected with cushion dashpot connects throttle valve and relief valve II; The size of throttle valve valve core opening depends on the size of load; When steel plate thickness all is sheared the moment of breaking, slider of hydraulic press drives mould and continues fast down motion, and the plunger of compressing cushion dashpot moves downward; Because the hydraulic oil in the cushion dashpot is oppressed, produces an opposition, it is descending that opposition stops slider of hydraulic press to continue, and realizes the slider of hydraulic press smooth transition, reduces noise, reduces the hydraulic press vibrations.
The front end of described one-way valve III has pressure gauge, the plunger of the described pressure gauge display buffer cylinder needed pressure that rises; This pressure is set by relief valve.
There is pressure gauge with electric contact the rear end of described one-way valve III, the working pressure of described pressure gauge with electric contact display buffer cylinder.
Good effect of the present invention is:
1, in the moment of steel plate shearing fracture, the kinetic energy that the reaction force that hydraulic buffer system produces comes the absorption liquid press to be produced is realized shearing the moment smooth transition that the steel plate process stops, and noise is little, and the hydraulic press vibrations are little.
2, adopt hydraulic element composition mode commonly used to realize buffering, reasonable in design, installation, maintenance is convenient, has the practical application promotional value.
3, the reaction force numerical value of buffer system is adjustable, is applicable to the sheet material blanking of different-thickness.
Description of drawings
Below in conjunction with the drawings and specific embodiments mode the present invention is described in further detail
Accompanying drawing is a hydraulic schematic diagram of the present invention.
Among the figure: 1, fuel tank, 2, motor, 3, oil pump, 4, one-way valve I, 5, relief valve I, 6, solenoid directional control valve I, 7, one-way valve II, 8, shuttle valve, 9, solenoid directional control valve II, 10, relief valve II, 11, throttle valve, 12, relief valve I II, 13, the upper limit sensor, 14, cushion dashpot, 15, lower limit sensor, 16, pressure gauge with electric contact, 17, one-way valve III, 18, pressure gauge, 19, press ram, 20, press bench.
The specific embodiment mode
As shown in drawings: a kind of hydraulic system principle of hydraulic press blanking damping device, motor 2 drives oil pump 3 and extracts hydraulic oil out from fuel tank 1, oil pump 3 output high pressure oils; It is characterized in that: the high pressure oil of described oil pump 3 outputs has two-way output, and wherein one the tunnel is the no worker oil circuit that refluxes, and high pressure oil is directly got back to fuel tank 1; Another road is a working oil path, and high pressure oil enters cushion dashpot 14.
The reflux path of oil circuit of described no worker is: oil pump 3 output high pressure oils are got back to fuel tank 1 through backing down one-way valve I 4.
The reflux hydraulic principle of oil circuit of no worker is: when slider of hydraulic press 19 is in the backhaul top dead center, and solenoid directional control valve I 6 no electric circuits, fluid is in lower pressure, backs down one-way valve I 4, is back to fuel tank 1.
The path of described working oil path is: oil pump 3 output high pressure oils are through entering cushion dashpot 14 by one-way valve II 7 and one-way valve III17.
The hydraulic principle of working oil path is: when solenoid directional control valve I 6, solenoid directional control valve II 9 energisings, the spool in the shuttle valve 8 is shifted onto the right by left side oil liquid pressure, and the path on shuttle valve 8 the right and return tube are connected, and fluid flow back into fuel tank; Passage inner fluid pressure enters cushion dashpot 14 by one-way valve II 7 and one-way valve III17 after setting through relief valve I 5, and the plunger jack-up of cushion dashpot 14 is arrived top dead center, and this moment, upper limit sensor 13 senders stopped to eject; Fluid pressure is closed between connecting pipeline and the various valve, and the fluid pressure of this moment shows numerical value by pressure gauge 18.
When slider of hydraulic press 19 drive moulds move downward, be placed with steel plate between the upper and lower mould, when mould touches steel plate, begin to shear blanking; When steel plate thickness was sheared 2/3, slider of hydraulic press 9 lower planes contacted with the plunger upper-end surface of cushion dashpot 14, and this moment, cushion dashpot 14 plungers were in unsteady downstream state; When cushion dashpot 14 plungers moved downward, the hydraulic oil in the cushion dashpot 14 was extruded, and pressed oil pressure to raise in the cylinder; When the oil pressure in the cushion dashpot 14 was provided with pressure value above relief valve III12, the hydraulic oil in the cushion dashpot 14 were back to fuel tank 1 by relief valve III12, to avoid detonation.
Another oil circuit that is connected with cushion dashpot 14 connects throttle valve 11 and relief valve II10; The size of throttle valve 11 valve core openings depends on the size of load; When steel plate thickness all is sheared the moment of breaking, slider of hydraulic press 19 drives moulds and continues fast down motion, and the plunger of compressing cushion dashpot 14 moves downward.Because the hydraulic oil in the cushion dashpot 14 is oppressed, produces an opposition, it is descending that opposition stops slider of hydraulic press 19 to continue, and realizes slider of hydraulic press 19 smooth transitions, reduces noise, reduces the hydraulic press vibrations.
The front end of described one-way valve III 17 has pressure gauge 18, the plunger of the described pressure gauge 18 display buffer cylinders 14 needed pressure that rises; This pressure is set by relief valve 5.
There is pressure gauge with electric contact 16 rear end of described one-way valve III17, the working pressure of described pressure gauge with electric contact 16 display buffer cylinders 14.Cushion dashpot 14 maximum service pressures are set by relief valve III 12 by hydraulic oil, its objective is and avoid detonation.

Claims (3)

1. the hydraulic system principle of a hydraulic press blanking damping device, motor (2) drives oil pump (3) and extracts hydraulic oil out from fuel tank (1), oil pump (3) output high pressure oil; It is characterized in that: the high pressure oil of described oil pump (3) output has two-way output, and wherein one the tunnel is the no worker oil circuit that refluxes, and high pressure oil is directly got back to fuel tank (1); Another road is a working oil path, and high pressure oil enters cushion dashpot (14);
The reflux path of oil circuit of described no worker is: oil pump (3) output high pressure oil is got back to fuel tank (1) through backing down one-way valve I (4); The reflux hydraulic principle of oil circuit of no worker is: when slider of hydraulic press (19) is in the backhaul top dead center, and solenoid directional control valve I (6) no electric circuit, fluid is in lower pressure, backs down one-way valve I (4), is back to fuel tank (1);
The path of described working oil path is: oil pump (3) output high pressure oil is through entering cushion dashpot (14) by one-way valve II (7) and one-way valve III (17); The hydraulic principle of working oil path is: when solenoid directional control valve I (6), solenoid directional control valve II (9) switched on, the spool in the shuttle valve (8) was shifted onto the right by left side oil liquid pressure, and the path and the return tube on shuttle valve (8) the right are connected, and fluid flow back into fuel tank; Passage inner fluid pressure enters cushion dashpot (14) by one-way valve II (7) and one-way valve III (17) after setting through relief valve I (5), and the plunger jack-up of cushion dashpot (14) is arrived top dead center, and this moment, upper limit sensor (13) sender stopped to eject; Fluid pressure is closed between connecting pipeline and the various valve, and the fluid pressure of this moment shows numerical value by pressure gauge (18);
When slider of hydraulic press (19) drive mould moves downward, be placed with steel plate between the upper and lower mould, when mould touches steel plate, begin to shear blanking; When steel plate thickness was sheared 2/3, slider of hydraulic press (19) lower plane contacted with the plunger upper-end surface of cushion dashpot (14), and this moment, cushion dashpot (14) plunger was in unsteady downstream state; Cushion dashpot (14) is when plunger moves downward, and the hydraulic oil in the cushion dashpot (14) is extruded, and presses oil pressure to raise in the cylinder; Oil pressure in cushion dashpot (14) surpasses relief valve III (12) when pressure value is set, and the hydraulic oil in the cushion dashpot (14) is back to fuel tank (1) by relief valve III (12);
Another oil circuit that is connected with cushion dashpot (14) connects throttle valve (11) and relief valve II (10); The size of throttle valve (11) valve core opening depends on the size of load; When steel plate thickness all is sheared the moment of breaking, slider of hydraulic press (19) drives mould and continues fast down motion, and the plunger of compressing cushion dashpot (14) moves downward; Because the hydraulic oil in the cushion dashpot (14) is oppressed, produces an opposition, it is descending that opposition stops slider of hydraulic press (19) to continue, and realizes slider of hydraulic press (19) smooth transition, reduces noise, reduces the hydraulic press vibrations.
2. the hydraulic system principle of hydraulic press blanking damping device according to claim 1, it is characterized in that: the front end of described one-way valve III (17) has pressure gauge (18), the plunger of described pressure gauge (18) display buffer cylinder (14) the needed pressure that rises; This pressure is set by relief valve I (5).
3. the hydraulic system principle of hydraulic press blanking damping device according to claim 1, it is characterized in that: there is pressure gauge with electric contact (16) rear end of described one-way valve III (17), the working pressure of described pressure gauge with electric contact (16) display buffer cylinder (14); Cushion dashpot (14) maximum service pressure is set by relief valve III (12) by hydraulic oil, avoids detonation.
CN 201110104869 2011-04-18 2011-04-18 Hydraulic system principle of blanking buffering device of hydraulic press Expired - Fee Related CN102168695B (en)

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Application Number Priority Date Filing Date Title
CN 201110104869 CN102168695B (en) 2011-04-18 2011-04-18 Hydraulic system principle of blanking buffering device of hydraulic press

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104259292A (en) * 2014-08-01 2015-01-07 浙江大学 Quick return type blanking buffer device and hydropress for blanking
CN105134682A (en) * 2015-10-14 2015-12-09 大隆机器有限公司 Return cushioning mechanism of sole pressing machine
CN106334745A (en) * 2015-07-06 2017-01-18 法因图尔国际控股股份公司 Method and device for reduction of cutting impact in a precision blanking press
CN109304381A (en) * 2018-11-21 2019-02-05 中国重型机械研究院股份公司 A kind of metal hydrostatic extruder extruded product buffer unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003429A (en) * 1995-07-06 1999-12-21 Komatsu Ltd. High speed and high-load cylinder device and method for controlling the same
CN1628071A (en) * 2002-02-11 2005-06-15 塞泰克股份公司 Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle
CN101922162A (en) * 2009-06-16 2010-12-22 沃尔沃建造设备控股(瑞典)有限公司 Hydraulic system for construction equipment having float function
CN202007801U (en) * 2011-04-18 2011-10-12 徐州开元世纪重型锻压有限公司 Hydraulic system principle of blanking buffer device of hydraulic machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003429A (en) * 1995-07-06 1999-12-21 Komatsu Ltd. High speed and high-load cylinder device and method for controlling the same
CN1628071A (en) * 2002-02-11 2005-06-15 塞泰克股份公司 Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle
CN100410163C (en) * 2002-02-11 2008-08-13 承载技术专利贸易公司 Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle
CN101922162A (en) * 2009-06-16 2010-12-22 沃尔沃建造设备控股(瑞典)有限公司 Hydraulic system for construction equipment having float function
CN202007801U (en) * 2011-04-18 2011-10-12 徐州开元世纪重型锻压有限公司 Hydraulic system principle of blanking buffer device of hydraulic machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104259292A (en) * 2014-08-01 2015-01-07 浙江大学 Quick return type blanking buffer device and hydropress for blanking
CN106334745A (en) * 2015-07-06 2017-01-18 法因图尔国际控股股份公司 Method and device for reduction of cutting impact in a precision blanking press
CN106334745B (en) * 2015-07-06 2019-06-21 法因图尔国际控股股份公司 Method and apparatus for reducing punching impact in fine blanking press
US10500628B2 (en) 2015-07-06 2019-12-10 Feintool International Holding Ag Method and apparatus for reducing cutting impact in a precision blanking press
CN105134682A (en) * 2015-10-14 2015-12-09 大隆机器有限公司 Return cushioning mechanism of sole pressing machine
CN109304381A (en) * 2018-11-21 2019-02-05 中国重型机械研究院股份公司 A kind of metal hydrostatic extruder extruded product buffer unit

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