CN105109079B - A kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof - Google Patents

A kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof Download PDF

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CN105109079B
CN105109079B CN201510516547.1A CN201510516547A CN105109079B CN 105109079 B CN105109079 B CN 105109079B CN 201510516547 A CN201510516547 A CN 201510516547A CN 105109079 B CN105109079 B CN 105109079B
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valve
hydraulic
control switching
switching valve
hydraulic control
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CN105109079A (en
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丁凡
蔡勇
刘硕
宋伟
方辉
沈莹杰
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Zhoushan Ocean Research Center of ZJU
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Zhoushan Ocean Research Center of ZJU
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Abstract

The invention discloses a kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof.Existing Presser Dashing voltage-frequency rate is typically below 500 beats/min, and stamping press is low, punching machine stroke is little.The present invention includes main fuel tank, filter, hydraulic pump, overflow valve I, accumulator I, pressure-reducing valve, check valve, accumulator the II, first bi-bit bi-pass high speed hydraulic control switching valve, two-position five-way hydraulic control switching valve, the second two-position two-way hydraulic control switching valve, overflow valve II, high speed great tonnage hydraulic cylinder, hydraulic pilot distributing valve, electromechanical transducer.50mm is adjustable for switching frequency of the present invention 1000 beats/min, hydraulic shock power 125T, stroke 5, its performance is more superior than mechanical punch, conventional hydraulic punch press, meet the needs of the production and processings such as thick blanks, deep drawn and rolling, have that noise is low, an advantage such as low, energy-conservation of generating heat, improve production efficiency.

Description

A kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof
Technical field
The invention belongs to dynamoelectric equipment field, be specifically related to a kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof.
Background technology
One of punch press Major Machine Tool being by punch process, mechanical punch and fluid pressure type punch press can be divided into according to the type of main transmission, it is widely used in the production divisions such as auto industry, agricultural machinery, household electrical appliance, electronic instrument, national defense industry and commodity, in recent years, the performance indications of the equipment such as punch press are had higher requirement by production industry, as equipment should have higher production efficiency and reliability.
The hydraulic system of fluid pressure type punch press is its core.The domestic independent product that hydraulic press is mostly simple in construction, automaticity is the highest produced, fairly perfect high velocity ram machine is started late at home, punching press frequency is typically below 500 beats/min, the biggest gap is there is compared with Foreign Advanced Lerel, and hydraulic system used relies on external import, cost is the highest, is not suitable for the current Economic Development Status of China.Simultaneously, the products characteristics of the most famous external hydraulic press production firm is that punching press frequency is higher, but stamping press is low, punching machine stroke is little, and the applicable surface of punch press is the narrowest, it is only used for the punching press of thin slice, it is impossible to meet the needs of the production and processings such as thick blanks, deep drawn and rolling.If stroke to be improved, expanding the scope of application of stamping parts, punching press frequency just declines to a great extent.
Summary of the invention
It is an object of the invention to design the hydraulic system of a kind of ultrahigh speed big stroke great tonnage hydraulic punch press, make that punch press has punching press frequency 1000 beats/min, stroke 5-50mm is adjustable, stamping press reaches the performances such as 125T, solve the problem that existing punching press frequency, stamping press and punching machine stroke can not be the highest, meet the needs of the production and processings such as thick blanks, deep drawn and rolling.
The present invention solves technical problem and the technical scheme is that
The hydraulic system of described ultrahigh speed big stroke great tonnage hydraulic punch press mainly includes main fuel tank, filter, hydraulic pump, overflow valve I, accumulator I, pressure-reducing valve, check valve, accumulator the II, first bi-bit bi-pass high speed hydraulic control switching valve, two-position five-way hydraulic control switching valve, the second two-position two-way hydraulic control switching valve, overflow valve II, high speed great tonnage hydraulic cylinder, hydraulic pilot distributing valve, electromechanical converter.
nullDescribed main fuel tank is connected with the oil-in of filter,The oil-out of filter is connected with the oil-in of hydraulic pump,The oil-out of hydraulic pump respectively with the oil-in of overflow valve I、The oil-in of accumulator I、The oil-in of pressure-reducing valve、The A mouth of two-position five-way hydraulic control switching valve、The A mouth of the second two-position two-way hydraulic control switching valve connects,The oil-out of pressure-reducing valve is connected with the oil-in of check valve,The oil-out of check valve respectively with accumulator II、The A mouth of the first bi-bit bi-pass high speed hydraulic control switching valve connects,The B mouth of the first two-position two-way hydraulic control switching valve at a high speed is connected with the B mouth of high speed great tonnage hydraulic cylinder epicoele,The B mouth of the second two-position two-way hydraulic control switching valve is connected with the C mouth of high speed great tonnage hydraulic cylinder epicoele,The D mouth of two-position five-way hydraulic control switching valve is connected with the A mouth of high speed great tonnage hydraulic cylinder epicoele,The E mouth of two-position five-way hydraulic control switching valve is connected with high speed great tonnage hydraulic cylinder cavity of resorption,The C mouth of two-position five-way hydraulic control switching valve is connected with the oil-in of overflow valve II,The oil-out of overflow valve I、The B mouth of the oil-out of overflow valve II and two-position five-way hydraulic control switching valve is connected with main fuel tank.
Described hydraulic pump can discharge pressure oil, for system provide hydraulic energy.Described overflow valve I is used for the maximum pressure of the system that limits.Described accumulator I is used for reducing system vibration.Hydraulic oil decompression is low pressure oil by described pressure-reducing valve, enters check valve.Described check valve is used for guaranteeing that low pressure fluid can only flow to the first bi-bit bi-pass switching valve at a high speed from pressure-reducing valve outlet, and can not reverse flow.Described electromechanical converter uses helix tube type, wet type high pressure resistant armature drive mechanism, and the signal of telecommunication that can accurately be sent by numerical control device instruction is transformed into mechanical signal.Hydraulic pilot distributing valve uses sliding valve structure, mechanical signal can accurately be transformed into pressure signal, in order to control the first bi-bit bi-pass high speed hydraulic control switching valve, two-position five-way hydraulic control switching valve, the work of the second two-position two-way hydraulic control switching valve.First, second described bi-bit bi-pass high speed hydraulic control switching valve uses structure inserted valve and guiding valve combined, and i.e. utilizes inserted valve conveyance capacity big, the advantage that guiding valve power consumption is little.Described high speed great tonnage hydraulic cylinder uses the wear ring of polytetrafluoroethylene (PTFE), avoid the metal between piston and cylinder body and piston rod and end cap and metal friction, and use composite seal ring such as Glan circle, this contour sealing ring forcing down friction of special envelope, guarantee low friction, hydraulic cylinder turnover oil is fast, turnover fluid resistance is little, and frequency response is high, No leakage.
Above-mentioned hydraulic work system process is: numerical control device sends command signal (signal of telecommunication) and drives electromechanical converter work, command signal is transformed into mechanical signal by electromechanical converter, and drive hydraulic pilot distributing valve to work, hydraulic pilot distributing valve sequentially exports 3 road fuel injection pressure signals, i.e. fuel injection pressure signal I, fuel injection pressure signal II, fuel injection pressure signal III, fuel injection pressure signal I controls the work of two-position five-way hydraulic control switching valve, fuel injection pressure signal II controls the work of the first bi-bit bi-pass high speed hydraulic control switching valve, and fuel injection pressure signal III controls the work of the second two-position two-way hydraulic control switching valve.During the downward F.F. of high speed great tonnage hydraulic cylinder, now the first bi-bit bi-pass high speed hydraulic control switching valve is opened, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, pressure-reducing valve (decompression is 1MPa), check valve, first bi-bit bi-pass high speed hydraulic control switching valve, enter the epicoele of high speed great tonnage hydraulic cylinder, treat that high speed great tonnage hydraulic cylinder drops to and rushed workpiece, second two-position two-way hydraulic control switching valve is opened, first bi-bit bi-pass high speed hydraulic control switching valve cuts out simultaneously, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, second two-position two-way hydraulic control switching valve, enter high speed great tonnage hydraulic cylinder epicoele, start stamped workpieces.Punching press complete after high speed great tonnage hydraulic cylinder upwards rewind, now two-position five-way hydraulic control switching valve, first bi-bit bi-pass high speed hydraulic control switching valve is opened, second two-position two-way hydraulic control switching valve cuts out simultaneously, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, two-position five-way hydraulic control switching valve, enter the cavity of resorption of high speed great tonnage hydraulic cylinder, a hydraulic oil part in high speed great tonnage hydraulic cylinder epicoele switches valve by two-position five-way hydraulic control, overflow valve II, enter main fuel tank, another part is by the first bi-bit bi-pass high speed hydraulic control switching valve, enter accumulator II.After rewind completes, complete a punching press, then hydraulic pilot distributing valve the most sequentially output oil pressure signal, by controlling the first bi-bit bi-pass high speed hydraulic control switching valve, two-position five-way hydraulic control switching valve, the second two-position two-way hydraulic control switching valve, make high speed great tonnage hydraulic cylinder action again, complete press work.
Performance and advantage that the present invention has be:
1, the hydraulic system switching frequency of ultrahigh speed big stroke great tonnage hydraulic punch press 1000 beats/min, hydraulic shock power 125T, stroke 5-50mm is adjustable, its performance is more superior than mechanical punch, conventional hydraulic punch press, meet the needs of the production and processings such as thick blanks, deep drawn and rolling, have that noise is low, the advantage such as low, energy-conservation of generating heat, improve production efficiency.
2, the switching of the bi-bit bi-pass high speed hydraulic control in ultrahigh speed big stroke great tonnage hydraulic punch press hydraulic system valve, use the method design that inserted valve and guiding valve combine, power consumption < 1kw, flow > 10000 liters/min, switching frequency >=1000 beat/min, it is ensured that the performance requirement of a whole set of hydraulic system.
3, the electromechanical tool converter in ultrahigh speed big stroke great tonnage hydraulic punch press hydraulic system and hydraulic pilot distributing valve steady state controling precision are high, dynamic response performance is high, antijamming capability is strong, it is ensured that punch process completes in 60ms every time.
Accompanying drawing explanation
Fig. 1 is the hydraulic scheme of ultrahigh speed big stroke great tonnage hydraulic punch press;
In figure: 1-main fuel tank, 2-filter, 3-hydraulic pump, 4-overflow valve I, 5-accumulator I, 6-pressure-reducing valve, 7-check valve, 8-accumulator II, 9-bi-bit bi-pass high speed hydraulic control switching valve, 10-electromechanical converter, 11-hydraulic pilot distributing valve, 12-two-position five-way hydraulic control switching valve, 13-overflow valve II, 14-high speed great tonnage hydraulic cylinder, 14-1-high speed great tonnage hydraulic cylinder epicoele, 14-2-high speed great tonnage hydraulic cylinder cavity of resorption, 15-two-position two-way hydraulic control switching valve.
Detailed description of the invention
As it is shown in figure 1, the hydraulic system of the present embodiment ultrahigh speed big stroke great tonnage hydraulic punch press is made up of main fuel tank 1, filter 2, hydraulic pump 3, overflow valve I4, accumulator I5, pressure-reducing valve 6, check valve 7, accumulator II 8, bi-bit bi-pass high speed hydraulic control switching valve 9, two-position five-way hydraulic control switching valve 12, two-position two-way hydraulic control switching valve 15, overflow valve II 13, high speed great tonnage hydraulic cylinder 14, hydraulic pilot distributing valve 11, electromechanical converter 10 etc..
nullIn Fig. 1,Main fuel tank 1 is connected with the oil-in of filter 2,The oil-out of filter 2 is connected with the oil-in of hydraulic pump 3,The oil-out of hydraulic pump 3 respectively with the oil-in of overflow valve I4、The oil-in of accumulator I5、The oil-in of pressure-reducing valve 6、The A mouth of two-position five-way hydraulic control switching valve 12、The A mouth of two-position two-way hydraulic control switching valve 15 connects,The oil-out of pressure-reducing valve 6 is connected with the oil-in of check valve 7,The oil-out of check valve 7 respectively with accumulator II 8、The A mouth of bi-bit bi-pass high speed hydraulic control switching valve 9 connects,The B mouth of two-position two-way hydraulic control switching valve 9 at a high speed is connected with the B mouth of high speed great tonnage hydraulic cylinder epicoele 14-1,The B mouth of two-position two-way hydraulic control switching valve 15 is connected with the C mouth of high speed great tonnage hydraulic cylinder epicoele 14-1,The D mouth of two-position five-way hydraulic control switching valve 12 is connected with the A mouth of high speed great tonnage hydraulic cylinder epicoele 14-1,The E mouth of two-position five-way hydraulic control switching valve 12 is connected with high speed great tonnage hydraulic cylinder cavity of resorption 14-2,The C mouth of two-position five-way hydraulic control switching valve 12 is connected with the oil-in of overflow valve II 13,The oil-out of overflow valve I4、The B mouth of the oil-out of overflow valve II 13 and two-position five-way hydraulic control switching valve 12 is connected with main fuel tank 1.
The course of work of the present embodiment hydraulic system is:
Numerical control device sends command signal (signal of telecommunication) and drives electromechanical converter 10 to work, command signal is transformed into mechanical signal by electromechanical converter 10, and drive hydraulic pilot distributing valve 11 to work, hydraulic pilot distributing valve 11 sequentially exports 3 road fuel injection pressure signals, i.e. fuel injection pressure signal I, fuel injection pressure signal II, fuel injection pressure signal III, fuel injection pressure signal I controls the work of two-position five-way hydraulic control switching valve 12, fuel injection pressure signal II controls the work of bi-bit bi-pass high speed hydraulic control switching valve 9, and fuel injection pressure signal III controls the work of two-position two-way hydraulic control switching valve 15.During the 14 downward F.F. of high speed great tonnage hydraulic cylinder, now bi-bit bi-pass high speed hydraulic control switching valve 9 is opened, the hydraulic oil of 21MPa is from main fuel tank 1, pass sequentially through filter 2, hydraulic pump 3, pressure-reducing valve 6(decompression is 1MPa), check valve 7, bi-bit bi-pass high speed hydraulic control switching valve 9, enter high speed great tonnage hydraulic cylinder epicoele 14-1, treat that high speed great tonnage hydraulic cylinder 14 drops to and rushed workpiece, two-position two-way hydraulic control switching valve 15 is opened, the switching valve 9 of bi-bit bi-pass high speed hydraulic control simultaneously cuts out, the hydraulic oil of 21MPa is from main fuel tank 1, pass sequentially through filter 2, hydraulic pump 3, two-position two-way hydraulic control switching valve 15, enter high speed great tonnage hydraulic cylinder epicoele 14-1, start stamped workpieces.Punching press complete after high speed great tonnage hydraulic cylinder 14 upwards rewind, now two-position five-way hydraulic control switching valve 12, bi-bit bi-pass high speed hydraulic control switching valve 9 is opened, the valve 15 of two-position two-way hydraulic control switching simultaneously cuts out, the hydraulic oil of 21MPa is from main fuel tank 1, pass sequentially through filter 2, hydraulic pump 3, two-position five-way hydraulic control switching valve 12, enter high speed great tonnage hydraulic cylinder cavity of resorption 14-2, a hydraulic oil part in high speed great tonnage hydraulic cylinder epicoele 14-1 switches valve 12 by two-position five-way hydraulic control, overflow valve II 13, enter main fuel tank 1, another part switches valve 9 by bi-bit bi-pass high speed hydraulic control, enter accumulator II 8.After rewind completes, complete a punching press, then hydraulic pilot distributing valve 11 the most sequentially output oil pressure signal, by controlling bi-bit bi-pass high speed hydraulic control switching valve 9, two-position five-way hydraulic control switching valve 12, two-position two-way hydraulic control switching valve 15, make high speed great tonnage hydraulic cylinder 14 action again, complete press work.

Claims (7)

1. a ultrahigh speed big stroke large-tonnage punch press hydraulic system, including main fuel tank, filter, hydraulic pump, overflow valve I, accumulator I, pressure-reducing valve, check valve, accumulator the II, first two-position two-way hydraulic control switching valve, two-position five-way hydraulic control switching valve, the second two-position two-way hydraulic control switching valve, overflow valve II, high speed great tonnage hydraulic cylinder, hydraulic pilot distributing valve, electromechanical converter, it is characterised in that:
nullDescribed main fuel tank is connected with the oil-in of filter,The oil-out of filter is connected with the oil-in of hydraulic pump,The oil-out of hydraulic pump respectively with the oil-in of overflow valve I、The oil-in of accumulator I、The oil-in of pressure-reducing valve、The A mouth of two-position five-way hydraulic control switching valve、The A mouth of the second two-position two-way hydraulic control switching valve connects,The oil-out of pressure-reducing valve is connected with the oil-in of check valve,The oil-out of check valve respectively with accumulator II、The A mouth of the first two-position two-way hydraulic control switching valve connects,The B mouth of the first two-position two-way hydraulic control switching valve is connected with the B mouth of high speed great tonnage hydraulic cylinder epicoele,The B mouth of the second two-position two-way hydraulic control switching valve is connected with the C mouth of high speed great tonnage hydraulic cylinder epicoele,The D mouth of two-position five-way hydraulic control switching valve is connected with the A mouth of high speed great tonnage hydraulic cylinder epicoele,The E mouth of two-position five-way hydraulic control switching valve is connected with high speed great tonnage hydraulic cylinder cavity of resorption,The C mouth of two-position five-way hydraulic control switching valve is connected with the oil-in of overflow valve II,The oil-out of overflow valve I、The B mouth of the oil-out of overflow valve II and two-position five-way hydraulic control switching valve is connected with main fuel tank;
Described electromechanical converter receives the signal of telecommunication instruction sent from numerical control device, it is converted into mechanical signal, mechanical signal is transformed into pressure signal by the distribution of described hydraulic pilot, in order to control the first two-position two-way hydraulic control switching valve, two-position five-way hydraulic control switching valve, the work of the second two-position two-way hydraulic control switching valve.
Ultrahigh speed the most according to claim 1 big stroke large-tonnage punch press hydraulic system, it is characterised in that: described hydraulic pump can discharge pressure oil, for system provide hydraulic energy;Described overflow valve I is used for the maximum pressure of the system that limits;Described accumulator I is used for reducing system vibration;Hydraulic oil decompression is low pressure oil by described pressure-reducing valve, enters check valve;Described check valve is used for guaranteeing that low pressure fluid can only flow to the first two-position two-way hydraulic control switching valve from pressure-reducing valve outlet, and can not reverse flow.
Ultrahigh speed the most according to claim 1 big stroke large-tonnage punch press hydraulic system, it is characterised in that: described electromechanical converter uses helix tube type, wet type high pressure resistant armature drive mechanism, and hydraulic pilot distributing valve uses sliding valve structure.
Ultrahigh speed the most according to claim 1 big stroke large-tonnage punch press hydraulic system, it is characterized in that: the structure that the first described two-position two-way hydraulic control switching valve and the second two-position two-way hydraulic control switching valve all use inserted valve and guiding valve to combine, i.e. utilize inserted valve conveyance capacity big, the advantage that guiding valve power consumption is little.
Ultrahigh speed the most according to claim 1 big stroke large-tonnage punch press hydraulic system, it is characterized in that: described high speed great tonnage hydraulic cylinder uses the wear ring of polytetrafluoroethylene (PTFE), avoid the metal between piston and cylinder body and piston rod and end cap and metal friction, and use composite seal ring.
Ultrahigh speed the most according to claim 5 big stroke large-tonnage punch press hydraulic system, it is characterised in that: described composite seal ring uses Glan circle or this special envelope.
7. ultrahigh speed big stroke large-tonnage punch press hydraulic work system method, uses hydraulic system as claimed in claim 1, it is characterised in that:
Numerical control device sends command signal and drives electromechanical converter work, command signal is transformed into mechanical signal by electromechanical converter, and drive hydraulic pilot distributing valve to work, hydraulic pilot distributing valve sequentially exports 3 road fuel injection pressure signals, i.e. fuel injection pressure signal I, fuel injection pressure signal II, fuel injection pressure signal III, fuel injection pressure signal I controls the work of two-position five-way hydraulic control switching valve, fuel injection pressure signal II controls the work of the first two-position two-way hydraulic control switching valve, and fuel injection pressure signal III controls the work of the second two-position two-way hydraulic control switching valve;During the downward F.F. of high speed great tonnage hydraulic cylinder, now the first two-position two-way hydraulic control switching valve is opened, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, pressure-reducing valve, check valve, first two-position two-way hydraulic control switching valve, enter the epicoele of high speed great tonnage hydraulic cylinder, treat that high speed great tonnage hydraulic cylinder drops to and rushed workpiece, second two-position two-way hydraulic control switching valve is opened, first two-position two-way hydraulic control switching valve cuts out simultaneously, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, second two-position two-way hydraulic control switching valve, enter high speed great tonnage hydraulic cylinder epicoele, start stamped workpieces;Punching press complete after high speed great tonnage hydraulic cylinder upwards rewind, now two-position five-way hydraulic control switching valve, the first two-position two-way hydraulic control switching valve are opened, second two-position two-way hydraulic control switching valve cuts out simultaneously, the hydraulic oil of 21MPa is from main fuel tank, pass sequentially through filter, hydraulic pump, two-position five-way hydraulic control switching valve, enter the cavity of resorption of high speed great tonnage hydraulic cylinder, a hydraulic oil part in high speed great tonnage hydraulic cylinder epicoele switches valve, overflow valve II by two-position five-way hydraulic control, enter main fuel tank, another part, by the first two-position two-way hydraulic control switching valve, enters accumulator II;After rewind completes, complete a punching press, then hydraulic pilot distributing valve the most sequentially output oil pressure signal, by controlling the first two-position two-way hydraulic control switching valve, two-position five-way hydraulic control switching valve, the second two-position two-way hydraulic control switching valve, make high speed great tonnage hydraulic cylinder action again, complete press work.
CN201510516547.1A 2015-08-21 2015-08-21 A kind of ultrahigh speed big stroke large-tonnage punch press hydraulic system and method for work thereof Active CN105109079B (en)

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TW297800B (en) * 1995-07-06 1997-02-11 Komatsu Mfg Co Ltd
CN101225844B (en) * 2006-12-04 2010-12-22 丹科斯公司 System and valve devcie for quickly and exigently closing hydraulic actuated valve
CN100469480C (en) * 2007-01-05 2009-03-18 广东工业大学 High speed punch cutting device and its control method
CN101265686A (en) * 2007-03-13 2008-09-17 徐州工程机械科技股份有限公司 Vibrated roller hydraulic electric appliance control system
CN102950805A (en) * 2012-11-19 2013-03-06 无锡市京锡冶金液压机电有限公司 High-speed punch hydraulic system connection method capable of realizing fast direction change
CN204936252U (en) * 2015-08-21 2016-01-06 浙江大学舟山海洋研究中心 A kind of ultrahigh speed Long Distances large-tonnage punch press hydraulic system

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