CN108909006A - A kind of method of circulate operation high pressure apparatus - Google Patents
A kind of method of circulate operation high pressure apparatus Download PDFInfo
- Publication number
- CN108909006A CN108909006A CN201810765991.0A CN201810765991A CN108909006A CN 108909006 A CN108909006 A CN 108909006A CN 201810765991 A CN201810765991 A CN 201810765991A CN 108909006 A CN108909006 A CN 108909006A
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- Prior art keywords
- accumulator
- pressure
- high pressure
- hydraulic
- chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0052—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for fluid driven presses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a kind of methods of circulate operation high pressure apparatus, its object is to reduce energy consumption and its method in the high pressure apparatus for Forming Workpiece, each circulation has at least one stage, wherein the storage pressure p S in accumulator will be in the chamber of hydraulic fluid indentation hydraulic cylinder, so that pressure head is mobile relative to cylinder, pressure head is connected to cylinder, in at least part of each circulation, accumulator is delivered hydraulic fluid to the volume flow rate that charges by the hydraulic pump that motor drives, by the way that the speed of motor is set as nominal motor speed nN and at least one median nZ, storage pressure p S is adjusted to reference value, wherein 0<nZ<nN.A kind of method of circulate operation high pressure apparatus of the invention, the energy consumption in component shaping method is reduced by hydraulic forming machine and for the high pressure apparatus of Forming Workpiece.
Description
Technical field
The present invention relates to high pressure apparatus applied technical fields, and in particular to a kind of method of circulate operation high pressure apparatus.
Background technique
DE2544794A1, which is described, a kind of to be made of pressure machine frame, fluid pressure drive device, oil pump and two accumulators
High pressure apparatus, hydraulic transmission include working cylinder, and working cylinder is with larger-diameter working piston and with the fortune of small diameter
The movement cylinders of piston, piston are fixedly connected at each interval, and working cylinder is supplied by a direction valve from the first accumulator, are transported
Dynamic cylinder is supplied by the servo valve in a close loop control circuit from the second accumulator.Control loop is by target value generator, tune
Amplifier, servo valve, stroke sensor and measuring amplifier composition are saved, directional valve comes real as the valve with the fixed position of the switch
Existing, hydraulic system bears excessively high pressure in order to prevent, and pressure limit valve, the pressure limit valve are arranged in the pressure piping of pump
Lead to accumulator, oil mass needed for squeezer is conveyed from fuel tank by accumulator by pump, is applied from the compressible medium of gas cylinder
To accumulator.In addition this document describes the job order and operation of the press machine, wherein the uppermost position of hydraulic piston is
Starting point provides a signal to adjusting amplifier by target value generator, this will be watched after system is connected and accumulator is filled
Valve driving is taken to the position of release oil, to supply moving gas cylinder, moving piston with to be fixedly connected with working piston on it downward
Movement, this move downward are sent to stroke sensor, and the output signal of stroke sensor is converted into measuring amplifier
The signal proportional to stroke is compared in adjusting amplifier and target value signal, and the deviation of two signals is put in adjusting
It is handled in big device, and provides correction signal to servo valve.Adjust amplifier, servo valve, movement cylinders, stroke sensor and survey
Amount amplifier close loop control circuit is consequently formed so that moving piston movement with the electric signal from target value generator at than
Example.In this way, working piston is moved to the position accurately established, and until workpiece or on workpiece, is working
In the second part of stroke, by the pressure stroke of switching reversal valve starting, first accumulator is previously filled with pressing stroke meter
The oil mass of amount, is applied on working piston by direction, and the oil of the aluminium valve amount leads to the predetermined continuity of the movement of working piston,
Corresponding to the oil mass measured in the first accumulator, after working piston carries out pressure stroke, switching direction valve, makes moving piston again
Return to the initial position in movement cylinders.In this case, oil present in working cylinder conveys oil return box by directional valve.In work
During pausing, the pressure oil of pump predetermined amount fills the first accumulator, which can pass through the limit on the first accumulator
Bit switch predefines, which switches oil valve in the pressure piping of pump, to lead to the first accumulator.This known
In method and this known press machine, adjusted during work stoppage the first accumulator to predetermined amount pressure oil, wherein leading to
Switching oil valve is crossed to set up and or change charging volume flow, since the compressible medium from gas cylinder is applied to the first accumulation of energy
Device, so the filling adjusts the pressure corresponded in the first accumulator and adjusts to pressure reference variable, the pressure reference variable
Dependent on limit switch and compressible medium, in the case where this known adjusting, zero is set by filled volume stream, because oily
Vavle switching closes the pressure fittings of the first accumulator and pump to closed position in the position.In this case disadvantageously, still
The pressure in pressure piping is so increased by the pump that the motor of static operation drives, until pressure limiting response valve and is connected compression fittings
Onto tank, so that pumping under full speed with idle, this leads to unnecessary high power consumption, in addition, pump must be designed sufficiently large,
So that the pressure oil of predetermined amount can be transported in accumulator during work stoppage.
Technical solution
The invention mainly solves the technical problem of providing a kind of methods of circulate operation high pressure apparatus, including：With at least one
A each circulation of stages operating, wherein hydraulic fluid is pressed by accumulator pressure pS present in accumulator from hydraulic accumulator
In the chamber of the hydraulic cylinder of press machine so as to it is mobile be connected to the cylinder body and can be connected to for make component shaping at
Formed punch of the shape tool relative to the press machine of the cylinder body, wherein at least part of each circulation, by motor driving
Hydraulic pump is delivered hydraulic fluid in accumulator with filling liquid volume flow, and accumulator pressure pS is adjusted to pressure reference change
Amount, wherein the speed of motor is set as the normal speed nN and at least one median nZ of motor.
Further, wherein at least one stage：Pressure reference variable according in the chamber it is prevailing at least
One chamber pressure PK is selected as function.
Further, function=pk+kp, the pressure correction value that wherein kp is 0.
Further, wherein：It is each circulation have close press machine closed stage, for Forming Workpiece working stage,
It is used to open the reset phase of press machine and for removing Forming Workpiece from press machine and for being suitable by this by component shaping
The charging stage of the workpiece of sequence forming, sliding block is moved to the first stroke height, make forming tool contact workpiece to be formed or
Positioned at the position being slightly spaced with workpiece to be formed, in working stage, jumper bar further moves to the second stroke height, from forming
Shape tool presses T, by component shaping, in reseting stage, piston is moved back to the first stroke height and further reaches third punching
Cheng Gaodu, to make forming tool be detached from Forming Workpiece and movement, wherein being maintained at third stroke height in the charging stage.
The beneficial effects of the invention are as follows：
The method of a kind of circulate operation high pressure apparatus of the invention, by hydraulic forming machine and for the high pressure apparatus of Forming Workpiece
To reduce the energy consumption in component shaping method.
Detailed description of the invention
Fig. 1 shows the synoptic chart of the preferred embodiment of high pressure apparatus.
Fig. 2 shows the time graph of the accumulator in the accumulator of the press machine of Fig. 1, press machine slider stroke and
The revolving speed of press machine motor is more than the method for three circulations.
Embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
Fig. 1 schematically shows the preferred embodiment of high pressure apparatus 10, the hydraulic press 10 can with circulate operation, wherein
Each sequentially has close stage, working stage, reseting stage and charging stage according to this.Press machine 10 has hydraulic cylinder
11, jumper bar 12, booster pump or hydraulic pump 13, motor 14, hydraulic accumulator 15, for the preliminary filling container or case 16 of hydraulic fluid,
Control unit 17, three pressure sensors 18.1 to 18.3, three valves 19.1 to 19.3 and frequency converter 20.Cylinder 11 has two
A chamber, i.e. pressure chamber 11.1 and reset chamber 11.2 and piston 11.3, are guided in cylinder 11, and by pressure chamber
11.1 separate from the resetting room 11.2 on the downside of it, and adjacent with its upside, jumper bar 12 is fixed under piston 11.3 with the upper end
Side, and be therefore connected to cylinder 11, and keep forming tool 21 in its lower end, which is connected thereto, at
Shape workpiece.Pump 13 has suction attachment 13.1 and compression fittings 13.2, and motor 14 is connected to pump as driver, and accumulator 15 connects
Pressure chamber 11.1, reset chamber 11.2 and pressure fittings 13.2 are connected to, and are implemented as example with the pressure vessel filled with nitrogen
Hydraulic accumulator.Storage tank 16 is connected to pressure chamber 11.1, reset chamber 11.2 and suction accessory 13.1, and motor 14 is asynchronous electricity
Motivation, 20 one side of frequency converter are connected to motor 14, are on the other hand connected to control unit 17, and control unit 17 is implemented, makes
It can by suitably activating frequency converter 14, continuously or nearly continuously from zero to datum speed neural network, thus
The speed of motor 14 is set to be set as zero, to reach datum speed neural network and at least one median N, wherein 0 < NZ.Control
Unit 17 processed is alternatively attached to pressure sensor 18, and pressure sensor 18 records accumulator 15 using accumulator sensor 18.1
In the presence of accumulator PS, the first chamber pressure force snesor 18.2 is for recording operating pressure PA, in pressure chamber 11.1, second
Chamber pressure sensors 18.3 are for being recorded in reset pressure PR present in reset chamber 11.2.Control unit 17 additionally connects
To valve 19, which is direction valve, wherein the first valve 19.1 between pressure chamber 11.1 and accumulator 15 and pressure chamber 11.1
Between tank 16, the second valve 19.2 is between reset chamber 11.2 and accumulator 15 and reset chamber 11.2 and storage tank 16, third
Valve 19.3 is between compression fittings 13.2 and accumulator 15 and between compression fittings 13.2 and tank 16.First valve 19.1 is one
A 3/3 to valve, i.e., hydraulic fluid conduit accessory and three position of the switch there are three it, and can be alternately by pressure chamber 11.1
It is disconnected from tank 16, and is connected to accumulator 15 or is disconnected from accumulator 15.Tank 16 breaks it from accumulator 15 and tank 16
It opens, the second valve 19.2 is 3/3 to valve, can alternately be disconnected reset chamber 11.2 from tank 16, and be connected to accumulator 15
Or it is disconnected from accumulator 15, and be connected to tank 16 or disconnected from accumulator 15 and tank 16.Third valve 19.3 is one
3/2 to valve, i.e., the connector of hydraulic fluid conduit and two position of the switch is used for there are three it, and can alternately connect pressure
First 13.2 disconnect from tank 16, and are connected to battery 15 or disconnect from battery 15 and be connected to battery 15.
Fig. 2 schematically shows three weeks of a preferred embodiment of the method for the press machine 10 for operation diagram 1
Phase, over time, control unit 17 realizes the circulate operation of press machine 10 to motor 14, and in each circulation, it will
It is coupled to jumper bar 12 thereon in close stage and forming tool 21 is reduced to the first stroke height H1, by it in working stage
Be further decreased to the second stroke height H2 and hold it in there, promoted after reseting stage to the first stroke it
Outside, further reach third stroke height H3, and hold it in the charging stage of third stroke height H3.In fig. 2 it is possible to
Closure phase is identified in the precipitous descending branch of H line, and active section can be connected on the horizontal segment of flat decline, then on it
Identification resets phase on horizontal segment, can be adjacent to identification in flat and then precipitous rising section and reset phase, and charge phase
Position can identify on horizontal segment adjacent thereto.In close stage, the reduction of jumper bar 12 and forming tool 21 is single by control
What member 17 was realized, or by suitably activating the first valve 19.1 and the second valve 19.2, disconnected in every case from accumulator
Chamber 11.1 and reset chamber 11.2 are pressed, and connects them to tank 16.Therefore, piston 11.3 and forming tool 21 consolidating by them
There is weight to stretch downwards, in this case, hydraulic oil is pressed into tank from reset chamber 11.2 from 16 suction pressure room 11.1 of tank
16.In working stage, the reduction of jumper bar 12 and forming tool 21 is realized by control unit 17, or by suitably activating
Pressure chamber 11.1 is disconnected from tank 16, and is connected to accumulator 15 by the first valve 19.1.Accumulator 15 starts in press machine 10
It almost charging afterwards, therefore at the beginning of first circulation, accumulator pressure PS is just below a upper operating pressure PO, it
Corresponding to the maximum pressure that accumulator 15 is able to bear, the time do not damaged or designed.Therefore, piston 11.3,12 and of piston
Forming tool 21 is downwardly against under the accumulator PS in accumulator 15 by hydraulic oil, to resist forming force or forming pressure.
In this case, hydraulic oil is pressed into pressure chamber 11.1 from accumulator 15, and is pressed into tank 16 from reset chamber 11.2.It is protected in working stage
It holds jumper bar 12 and forming tool 21 is realized as control unit 17 or as caused by control unit 17, by suitably activating first
Valve 19.1 disconnects pressure chamber 11.1 from accumulator 15 and tank 16, to close it.Therefore, in the hydraulic oil of ballasting inner sealing
It can neither flow out, hydraulic oil can not be flowed back into pressure chamber 11.1, piston 11.3, jumper bar 12 and forming tool 21 keep quiet
Only.The raising of jumper bar 12 and forming tool 21 in reset phase is realized by control unit 17 or is drawn by control unit 17
It rises, that is, by suitably activating the first valve 19.1, pressure chamber 11.1 and accumulator 15 are disconnected, and be connected to tank 16,
And by second valve 19.2 of activation appropriate, it disconnects reset chamber 11.2 and tank 16, and is connected to accumulator 15.Cause
This, piston 11.3, piston 12 and forming tool 21 are pressed upwards by hydraulic oil, which is located at the accumulator in accumulator 15
Under PS.In this case, hydraulic oil is pressed into reset chamber 11.2 from accumulator 15, and enters storage tank from pressure chamber 11.1
16, the charging of accumulator 15 is to be realized by control unit 17 or caused, that is, by suitably activating frequency converter 20, it is arranged
The speed of motor 14, thus transfer tube 13, and by suitably activating third valve 19, its cut-out pressure connector.13 are pumped by liquid
Pressure oil is extracted out from tank 16, and is pressed into accumulator 15 using charging volume flow, this is determined by the setting of frequency converter 20
The speed of motor 14.In this preferred embodiment, control unit 17 is in addition realized, so that in all stages, it is by pressure accumulation
Device pressure PS is adjusted to pressure reference variable, real according to demand because speed and charging volume flow therefore is correspondingly arranged in it
Existing pressure controlled speed, or caused by control unit 17, that is, by suitably activating frequency converter 20, it is by speed from zero
Continue to datum speed neural network, and be therefore set as zero, reach datum speed neural network and median Nz, wherein 0 <
NZ。
The sequencing of above embodiments is not only for ease of description, represent the advantages or disadvantages of the embodiments.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (4)
1. a kind of method of circulate operation high pressure apparatus, including：With each circulation of at least one stages operating, wherein hydraulic fluid is logical
Accumulator pressure pS present in accumulator is crossed from the chamber of the hydraulic cylinder of hydraulic accumulator indentation press machine so as to mobile connection
It is connected to the cylinder body and rushing for the press machine for making the forming tool of component shaping relative to the cylinder body can be connected to
Head, wherein being conveyed hydraulic fluid with filling liquid volume flow by the hydraulic pump that motor drives at least part of each circulation
Into accumulator, and accumulator pressure pS is adjusted to pressure reference variable, and wherein the speed of motor is set as motor
Normal speed nN and at least one median nZ.
2. a kind of method of circulate operation high pressure apparatus according to claim 1, it is characterised in that：Wherein at least one rank
Duan Zhong：Pressure reference variable is selected as function according to prevailing at least one chamber pressure PK in the chamber.
3. a kind of method of circulate operation high pressure apparatus according to claim 2, it is characterised in that：Function=pk+kp, wherein
The pressure correction value that kp is 0.
4. a kind of method of circulate operation high pressure apparatus according to claim 1, it is characterised in that：Wherein：Each circulation tool
Have the closed stage for closing press machine, for Forming Workpiece working stage, be used to open the reset phase of press machine and be used for
Forming Workpiece and the charging stage for by component shaping being the workpiece shaped in the order are removed from press machine, and sliding block is moved
Move makes forming tool contact workpiece to be formed or positioned at the position being slightly spaced with workpiece to be formed to the first stroke height,
In working stage, jumper bar further moves to the second stroke height, so that forming tool presses T, by component shaping, is resetting rank
Section, moves back to the first stroke height for piston and further reaches third stroke height, so that forming tool be made to be detached from forming work
Part and movement, wherein being maintained at third stroke height in the charging stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765991.0A CN108909006A (en) | 2018-07-12 | 2018-07-12 | A kind of method of circulate operation high pressure apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765991.0A CN108909006A (en) | 2018-07-12 | 2018-07-12 | A kind of method of circulate operation high pressure apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108909006A true CN108909006A (en) | 2018-11-30 |
Family
ID=64411479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810765991.0A Withdrawn CN108909006A (en) | 2018-07-12 | 2018-07-12 | A kind of method of circulate operation high pressure apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108909006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396049A (en) * | 2018-12-06 | 2021-09-14 | 迪芬巴赫机械工程有限公司 | Continuous working press with coarse density distribution regulation |
-
2018
- 2018-07-12 CN CN201810765991.0A patent/CN108909006A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396049A (en) * | 2018-12-06 | 2021-09-14 | 迪芬巴赫机械工程有限公司 | Continuous working press with coarse density distribution regulation |
| CN113396049B (en) * | 2018-12-06 | 2024-05-14 | 迪芬巴赫机械工程有限公司 | Continuous working press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181130 |