CN105020208A - Hydraulic system operation control method and system device for isostatic pressing powder forming - Google Patents
Hydraulic system operation control method and system device for isostatic pressing powder forming Download PDFInfo
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- CN105020208A CN105020208A CN201510485143.0A CN201510485143A CN105020208A CN 105020208 A CN105020208 A CN 105020208A CN 201510485143 A CN201510485143 A CN 201510485143A CN 105020208 A CN105020208 A CN 105020208A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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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
- B30B15/16—Control arrangements for fluid-driven presses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a hydraulic system operation control method and a system device for isostatic pressing powder forming. Powder to be formed is poured in a powder cavity of an isostatic pressing machine. Isostatic pressing forming is carried out on powder in the powder cavity through an isostatic pressing forming device in the isostatic pressing machine. An isostatic pressing forming hydraulic operation system in the isostatic pressing machine is controlled in a servo control manner. The rotating speed and torsion of a motor are adjusted in a servo manner to accurately control the position and the pressing speed of a pressing head, the pressure of emulsified liquid in the powder cavity isostatic pressing forming device and time of boosting, pressurizing and pressure releasing. The position and the speed of the pressing head, the pressure of emulsified liquid in the powder cavity and time of boosting, pressurizing and pressure releasing are accurately controlled by adjusting the rotating speed and the torsion of the motor in the servo manner. A control system optimizes operation energy efficiency during operation to the maximum degree according to the operation requirements of various stages, and the method and the system device have the beneficial effects that overflow losses and standby no-load losses are avoided, the hydraulic temperature is low, water cooling is not needed, noise is low, and maintaining cost is low.
Description
Technical field
The present invention relates to a kind of forming equipment component system and operational method thereof, refer in particular to isostatic pressed hydraulic system and the operational method of a kind of spark plug ceramics insulator isostatic compaction and other powder compacting; This kind of isostatic pressed hydraulic system and operational method precisely can control ram position, the size of pressing speed and powder cave emulsified liquid pressure and boost pressurize and venting duration.Mainly should in the isostatic press of powder compacting.
background technique:
Isostatic compaction to treat that pressure sample is placed in high-pressure bottle, the character of the incompressible character of liquid medium and even transmission of pressure is utilized to carry out uniform pressurization from all directions to sample, when liquid medium is by pressure pump injection pressure container, according to fluid mechanics principle, its pressure size is constant and be delivered evenly to all directions.The pressure that powder now in high-pressure bottle is subject in all directions is uniform and of the same size.The method of the shaping dense green of lean property powder is made to be called isostatic pressing method by said method.Isostatic pressing process goods have uniform texture, density is high, sintering shrinkage is little, die cost is low, and manufacturing efficiency is high, plastic complex-shaped, elongated article and the outstanding advantages such as large scale goods and precise measure goods, it is a kind of more advanced moulding process at present, start alternative traditional forming method with the advantage of its uniqueness, as the product such as spark plug, porcelain ball, plunger, vacuum envelope of Production of Ceramics, demonstrate more and more wide application prospect.
In the production of the ceramics insulator of spark plug, just mostly all adopt isostatic compaction equipment making shaping at present, but the ceramics insulator isostatic compaction equipment of current spark plug is a kind of aluminium oxide formula powder that adopts to add in rubber mold cover, the outside special device applying high pressure fluid pressure and make powder shaping.This type of Hydraulic Equipment adopts AC induction motor band vane pump, with relief valve pressure regulating and solenoid valve commutation, to the shaping each link of powder base as standby, presses down, pressurization, pressurize, pressure release, to return etc. to carry out operation.But there is efficiency low (no-load standby loss and overflow loss high) in the hydraulic system of the ceramics insulator isostatic compaction equipment of existing spark plug, need Forced water cooling, noise is large, rate of fault is high, operational pressure instability (mechanical pressure regulation, unstable with oil temperature change), hydraulic oil and hydraulic parts short for working life, safeguard and user cost high, pressure head the problems such as cannot accurately to locate unloading base position, is necessaryly improved this.
Do not find that there is the patent literature constructed with the present invention by patent retrieval, to have the patent of certain relation to mainly contain following with the present invention:
1, the patent No. is CN201410421184, name is called the patent of invention of " the ceramic spark plug sintering process of a kind of automobile ", which disclose the ceramic spark plug sintering process of a kind of automobile, comprise isostatic compaction, grinding, biscuiting, glazing and high temperature sintering five steps.The slurry note hot press forming technology of the present invention by utilizing dry-pressing formed replacement traditional, isostatic pressed press is adopted to carry out cold moudling to dry powder, and in manufacturing process by continuing to optimize parameters such as the dry powder amount of feed, acid extraction, glazed thickness, shaping spark plug product density is high, sintering shrinkage is little, thermal characteristics is stable, manufacturing efficiency is high, and applicability is strong.
2, the patent No. is CN201110428676, name is called the patent of invention of " a kind of antiwear alumina ceramic ball isostatic pressing process and special device thereof ", which disclose a kind of antiwear alumina ceramic ball isostatic pressing process, comprise: the slurry transportation through preliminary treatment is carried out mist projection granulating process in spray drying tower, obtains the blank for the manufacture of alumina ball; By described blank by four-column hydraulic press pre-molding, obtain base substrate; The described base substrate through pre-molding is carried out in wet bag method isostatic press isostatic pressed compressing; The described base substrate compressing through isostatic pressed is entered in kiln and burns till at 1200 ~ 1800 DEG C of temperature, obtain antiwear alumina ceramic ball.The invention also discloses a kind of special device of antiwear alumina ceramic ball isostatic pressing process, comprise four-column hydraulic press.
3, the patent No. is CN201020142118, name is called the utility model patent of " isostatic-pressing molding device of ceramic ball ", which disclose a kind of isostatic-pressing molding device of ceramic ball, the hydrostatic cylinder such as to comprise, inner chamber of cylinder block such as is at the hydrostatic room, elastic ball mould such as to be arranged at the hydrostatic room, waits the cylinder body lower end of hydrostatic cylinder to connect the plunger of band base; Elastic ball mould opening upwards is articulated in cylinder body upper end bead and is fixed by pressing plate, a sectional shape is had to be the circular port of V-shaped in the middle of pressing plate, this circular port is corresponding with elastic ball mould aperture position, ball die cap assembly is shelved in the circular port in the middle of pressing plate, and forms closed cooperation with circular port and elastic ball mould opening.
Although these patents above-mentioned all relate to isostatic compaction device, what wherein also have has related to the improvement of isostatic compaction device, but the hydraulic system efficiency all not solving isostatic compaction equipment low (no-load standby loss and overflow loss high), need Forced water cooling, noise is large, rate of fault is high, (the mechanical pressure regulation of operational pressure instability, unstable with oil temperature change), hydraulic oil and hydraulic parts short for working life, safeguard and user cost high, pressure head the problems such as cannot accurately to locate unloading base position, therefore still needs to be improved further.
Summary of the invention
The object of the invention is to there is hydraulic system efficiency low (no-load standby loss and overflow loss high) for the isostatic press hydraulic system of existing powder compacting and operational method, need Forced water cooling, noise is large, rate of fault is high, (the mechanical pressure regulation of operational pressure instability, unstable with oil temperature change), hydraulic oil and hydraulic parts short for working life, safeguard and user cost high, pressure head many deficiencies such as cannot accurately to locate unloading base position, a kind of isostatic press hydraulic system and operational method of new powder compacting are proposed, the isostatic press hydraulic system of this powder compacting and operational method effectively can solve current isostatic press hydraulic system and operational method and there is hydraulic system efficiency low (no-load standby loss and overflow loss high), need Forced water cooling, noise is large, rate of fault is high, (the mechanical pressure regulation of operational pressure instability, unstable with oil temperature change), hydraulic oil and hydraulic parts short for working life, safeguard and user cost high, the problem that pressure head cannot unload base position and accurately locates.
In order to reach this purpose, the invention provides a kind of hydraulic system isostatic pressed job control method for isostatic pressed powder compacting, powder to be formed to be poured in isostatic press in chamber, powder cave, by the isostatic compaction device in isostatic press, isostatic compaction is carried out to powder in chamber, powder cave, it is characterized in that, the isostatic compaction hydraulic work system of isostatic press takes servo control mode to control, motor speed and torsion is regulated precisely to control ram position by servo mode, pressing speed, the size of emulsified liquid pressure and boosting in the isostatic compaction device of powder cave, pressurize and venting duration.
Further, the isostatic compaction hydraulic work system of described isostatic press is that what to take servo control mode to control is be pressed between frock at isostatic pressed oil cylinder and product to be provided with displacement of pressing head sensor, and sends isostatic pressed oil cylinder displacement data to control system and servo drive controller by displacement of pressing head sensor; Be pressed into frock at product and have pressurized cylinder, product is pressed between frock and pressurized cylinder and is provided with hydrostatic pressure sensor, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor send control system and servo drive controller to; On the HYDRAULIC CONTROL SYSTEM valve of isostatic press, be provided with the pressure transducer measuring hydraulic system pressure simultaneously, pressure transducer also sends the pressure data of hydraulic system to control system and servo drive controller, by control system and servo drive controller according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder, servocontrol is carried out to the actuating motor of hydraulic system.
Further, described control system and servo drive controller adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor and duplex gear pump and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, the PLC control system exported with AD and DA comes precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer, and boosting, pressurize and venting duration.
Further, the control program of described servo control mode is as follows:
1) add powder: by powder adding device be on isostatic press chamber, powder cave perfusion powder;
2) shaping preparation: the last startup servopump of chamber, powder cave perfusion powder, servopump drives duplex gear pump to begin through the ram cylinder feed flow that hydraulic control valve is isostatic press, ram cylinder is down moved, until touch isostatic compaction device;
3) shaping: down to move at ram cylinder, after touching isostatic compaction device, ram cylinder continues down to move, now duplex gear pump starts to turn to high pressure for liquid status, ram cylinder drives the ratio pressurized cylinder motion be arranged on below isostatic pressed powder forming unit, and provide hydraulic coupling by the supercharging of ratio pressurized cylinder to the isostatic tooling in isostatic pressed powder forming unit, make the shaping dense green of powder in chamber, powder cave;
4) pressurize: oil cylinder pressure head presses down to be stablized after isostatic compaction device makes powder cave hydraulic pressure reach process set value and to keep certain hour.
5) release: powder cave hydraulic pressure value unloads from process set value the process being pressed onto zero in the certain hour of setting.
6) standby: hydraulic system not operation, only maintain an oil cylinder and do not slip the hydraulic system underflow of cylinder and the running state of base pressure.
7) unload location, base position: after isostatic compaction, oil cylinder pressure head drive core bar and powder base upwards precision positioning rise to and unload base position.
A kind of hydraulic system realizing the isostatic pressed powder compacting of above-mentioned hydraulic system isostatic pressed job control method, comprise isostatic compaction device and isostatic compaction hydraulic system, isostatic compaction device is linked together by oil hydraulic circuit and isostatic compaction hydraulic system, and provide operation hydraulic pressure by isostatic compaction hydraulic system, it is characterized in that, isostatic compaction hydraulic system adopts servo mode to control, the main shaft of the hydraulic-pressure pump of isostatic press connects actuating motor, hydraulic-pressure pump is dragged by actuating motor, by hydraulic control valve, hydraulic oil is supplied to the action oil cylinder of isostatic press by hydraulic-pressure pump again, and regulate motor speed and torsion precisely to control the ram position of isostatic press by servo mode, pressing speed, and the size of powder cave hydrostatic pressure and boosting pressurize and venting duration.
Further, the hydraulic-pressure pump of described isostatic press is duplex gear pump, duplex gear pump is connected in parallel on same duplex gear pump main shaft, and duplex gear pump main shaft and servomotor spindle link together, and drives duplex gear pump main shaft rotary work by servomotor spindle.
Further, described duplex gear pump is a high-capacity pump, a low-capacity pump, and large pump and little pump are simultaneously coaxial drives work by actuating motor, when needing the hydraulic oil of large discharge low-pressure, supplies pressure oil by large pump and little pump to hydraulic system simultaneously; When needs high pressure small flow hydraulic oil, then large pump exports pressure release Bypass Control, only independently supplies high-pressure low-flow hydraulic oil by little pump.
Further, described isostatic pressed oil cylinder and product are pressed between frock and are provided with displacement of pressing head sensor, and send isostatic pressed oil cylinder displacement data to control system and servo drive controller by displacement of pressing head sensor; Be pressed into frock at product and have pressurized cylinder, product is pressed between frock and pressurized cylinder and is provided with hydrostatic pressure sensor, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor send control system and servo drive controller to; On the HYDRAULIC CONTROL SYSTEM valve of isostatic press, be provided with the pressure transducer measuring hydraulic system pressure simultaneously, pressure transducer also sends the pressure data of hydraulic system to control system and servo drive controller, by control system and servo drive controller according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder, servocontrol is carried out to the actuating motor of hydraulic system.
Further, described hydrostatic pressure sensor is powder cave emulsification hydraulic force snesor, the isostatic pressed chamber that powder cave emulsification hydraulic force snesor is pressed into product in frock respectively by a threeway is communicated with isostatic pressed emulsified liquid entrance, obtained the emulsified liquid pressure of isostatic pressed chamber and isostatic pressed emulsified liquid entrance by powder cave emulsification hydraulic force snesor, and send control system and servo drive controller to.
Further, described control system and servo drive controller adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor and duplex gear pump and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, and the PLC control system that band AD and DA exports comes precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer.
Further, cooling system is provided with between described hydraulic control valve and hydraulic reservoir, cooling system is arranged on hydraulic control valve oil return and exports among the oil return pipeline of hydraulic reservoir, cooling system hydraulic return system fuel tank again after cooling the hydraulic oil of discharging from operation oil cylinder.
Further, described cooling system is air cooling system, again hydraulic reservoir is flowed into by a shape coil pipe of wandering to the hydraulic oil of discharging from operation oil cylinder, is provided with cooling fan wandering outside shape coil pipe, by cooling fan, the reflux liquid force feed flowing through shape coil pipe of wandering is cooled.
The invention has the advantages that:
The present invention regulates motor speed and torsion precisely to control ram position by servo mode, the size of speed and powder cave emulsified liquid pressure and boost pressurize and venting duration, duplex gear pump is dragged with actuating motor, distribution magnetic hydraulicdirectional control valve, hydraulic fluid pressure and powder cave emulsification hydraulic force snesor, displacement of pressing head sensor, control system can according to each discontinuous running demand, distribution magnetic hydraulicdirectional control valve, hydraulic fluid pressure and powder cave emulsification hydraulic force snesor, displacement of pressing head sensor, control system can according to each discontinuous running demand, largest optimization operation efficiency in operation, without overflow loss and standby open circuit loss, hydraulic temperature is low without the need to water-cooled, noise is little, hydraulic system element is few, fault is few, long life and low maintenance cost, the present invention has the overall merit (powder pressure adopts servo feedback precisely to control, saving power, and without cooling water, use simple and reliable, maintenance cost is low, and the life-span is long, without overflow noise) of each side, has good Social and economic benef@, is worth promoting.
Accompanying drawing explanation
Fig. 1 is a kind of Hydraulic System Principle schematic diagram of the present invention.
Embodiment
The present invention is set forth further below in conjunction with the drawings and specific embodiments.
Embodiment one
Can be found out by accompanying drawing, the present invention relates to a kind of hydraulic system for isostatic pressed powder compacting, comprise isostatic compaction device 1, isostatic compaction hydraulic system 2 and control system and servo drive controller 3, isostatic compaction device 1 is linked together by oil hydraulic circuit and isostatic compaction hydraulic system 2, and provide operation hydraulic pressure by isostatic compaction hydraulic system 2, isostatic compaction hydraulic system 2 and isostatic compaction device 1 are controlled by control system and servo drive controller 3, it is characterized in that, isostatic compaction hydraulic system 2 adopts servo mode to control, the main shaft of the hydraulic-pressure pump 4 of isostatic press connects actuating motor 5, hydraulic-pressure pump 4 is dragged by actuating motor 5, HYDRAULIC CONTROL SYSTEM valve 14 and oil circuit 15 is passed through again by hydraulic-pressure pump 4, the isostatic pressed oil cylinder 6 of 16 pairs of isostatic presss is for hydraulic oil, and regulate actuating motor 5 rotating speed and torsion precisely to control pressure head 9 position of isostatic press by servo mode, pressing speed, and the size of powder cave hydrostatic pressure and boosting pressurize and venting duration.
Further, the hydraulic-pressure pump 4 of described isostatic press is duplex gear pump, duplex gear pump is connected in parallel on same duplex gear pump main shaft, and duplex gear pump main shaft and actuating motor 5 main shaft link together, and drives duplex gear pump main shaft rotary work by actuating motor 5 main shaft.
Further, described duplex gear pump 4 is a high-capacity pump 7, a low-capacity pump 8, high-capacity pump 7 and low-capacity pump 8 are simultaneously coaxial drives work by actuating motor 4, when needing the hydraulic oil of large discharge low-pressure, supply pressure oil to hydraulic system by high-capacity pump 7 and low-capacity pump 8 simultaneously; When needs high pressure small flow hydraulic oil, then high-capacity pump 7 exports pressure release Bypass Control, only independent of high-pressure low-flow hydraulic oil by low-capacity pump 8.
Further, the isostatic pressed oil cylinder 6 of described isostatic compaction device 1 and product are pressed between frock 10 and are provided with displacement of pressing head sensor 11, and send isostatic pressed oil cylinder 6 displacement data to control system and servo drive controller 3 by displacement data line 22 by displacement of pressing head sensor 11; Be pressed into frock 10 at product and have pressurized cylinder 12, product to be pressed between frock 10 and pressurized cylinder 10 and to be provided with hydrostatic pressure sensor 13, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor 13 send control system and servo drive controller 3 to by briquetting pressure datawire 23; On the HYDRAULIC CONTROL SYSTEM valve 14 of isostatic press, be provided with the pressure transducer 17 measuring hydraulic system pressure simultaneously, pressure transducer 17 also sends the pressure data of hydraulic system to control system and servo drive controller 3 by hydraulic system pressure datawire 24, by control system and servo drive controller 3 according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder 18, control signal is carried out servocontrol by the actuating motor 4 of control signal datawire 25,26 pairs of hydraulic systems.
Further, described hydrostatic pressure sensor 13 is powder cave emulsification hydraulic force snesor, the isostatic pressed chamber 19 that hydrostatic pressure sensor 13 is pressed into product in frock 10 respectively by a threeway is communicated with isostatic pressed emulsified liquid entrance 21, obtained the emulsified liquid pressure of isostatic pressed chamber 10 and isostatic pressed emulsified liquid entrance 21 by hydrostatic pressure sensor 13, and send control system and servo drive controller 3 to.
Further, described control system and servo drive controller 3 adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor 4 and duplex gear pump 5 and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, and the PLC control system that band AD and DA exports comes precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer.
Further, cooling system is provided with between described hydraulic control valve 14 and hydraulic reservoir 20, cooling system is arranged on hydraulic control valve oil return and exports among the oil return pipeline of hydraulic reservoir, cooling system hydraulic return system fuel tank again after cooling the hydraulic oil of discharging from operation oil cylinder.
Further, described cooling system is air cooling system, again hydraulic reservoir is flowed into by a shape coil pipe of wandering to the hydraulic oil of discharging from operation oil cylinder, is provided with cooling fan wandering outside shape coil pipe, by cooling fan, the reflux liquid force feed flowing through shape coil pipe of wandering is cooled.
Obviously, the embodiment cited by the application is just in order to be described further cited example to principle of the present invention and structure, and any some improvement done according to principle design of the present invention all should belong to the scope that the present invention protects.
Can be found out by above-described embodiment, the invention still further relates to a kind of isostatic pressed job control method utilizing the above-mentioned hydraulic system for isostatic pressed powder compacting, powder to be formed to be poured in isostatic press in chamber, powder cave, by the isostatic compaction device in isostatic press, isostatic compaction is carried out to powder in chamber, powder cave, it is characterized in that, the isostatic compaction hydraulic work system of isostatic press takes servo control mode to control, motor speed and torsion is regulated precisely to control ram position by servo mode, pressing speed, the size of emulsified liquid pressure and boosting in the isostatic compaction device of powder cave, pressurize and venting duration.
Further, the isostatic compaction hydraulic work system of described isostatic press is that what to take servo control mode to control is be pressed between frock at isostatic pressed oil cylinder and product to be provided with displacement of pressing head sensor, and sends isostatic pressed oil cylinder displacement data to control system and servo drive controller by displacement of pressing head sensor; Be pressed into frock at product and have pressurized cylinder, product is pressed between frock and pressurized cylinder and is provided with hydrostatic pressure sensor, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor send control system and servo drive controller to; On the HYDRAULIC CONTROL SYSTEM valve of isostatic press, be provided with the pressure transducer measuring hydraulic system pressure simultaneously, pressure transducer also sends the pressure data of hydraulic system to control system and servo drive controller, by control system and servo drive controller according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder, servocontrol is carried out to the actuating motor of hydraulic system.
Further, described control system and servo drive controller adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor and duplex gear pump and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, the PLC control system exported with AD and DA comes precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer, and boosting, pressurize and venting duration.
Further, the control program of described servo control mode is as follows:
1) add powder: by powder adding device be on isostatic press chamber, powder cave perfusion powder;
2) shaping preparation: the last startup servopump of chamber, powder cave perfusion powder, servopump drives duplex gear pump to begin through the ram cylinder feed flow that hydraulic control valve is isostatic press, ram cylinder is down moved, until touch isostatic compaction device;
3) shaping: down to move at ram cylinder, after touching isostatic compaction device, ram cylinder continues down to move, now duplex gear pump starts to turn to high pressure for liquid status, ram cylinder drives the ratio pressurized cylinder motion be arranged on below isostatic pressed powder forming unit, and provide hydraulic coupling by the supercharging of ratio pressurized cylinder to the isostatic tooling in isostatic pressed powder forming unit, make the shaping dense green of powder in chamber, powder cave.
4) pressurize: oil cylinder pressure head presses down to be stablized after isostatic compaction device makes powder cave hydraulic pressure reach process set value and to keep certain hour.
5) release: powder cave hydraulic pressure value unloads from process set value the process being pressed onto zero in the certain hour of setting.
6) standby: hydraulic system not operation, only maintain an oil cylinder and do not slip the hydraulic system underflow of cylinder and the running state of base pressure.
7) unload location, base position: after isostatic compaction, oil cylinder pressure head drive core bar and powder base upwards precision positioning rise to and unload base position.
The invention has the advantages that:
The present invention regulates motor speed and torsion precisely to control ram position by servo mode, the size of speed and powder cave emulsified liquid pressure and boost pressurize and venting duration, duplex gear pump is dragged with actuating motor, distribution magnetic hydraulicdirectional control valve, hydraulic fluid pressure and powder cave emulsification hydraulic force snesor, displacement of pressing head sensor; Control system can according to each discontinuous running demand, by controlling electromagnetic hydraulic pressure selector valve, hydraulic fluid pressure and powder cave emulsification hydraulic force snesor, displacement of pressing head sensor meets each discontinuous running demand, largest optimization operation efficiency in operation, without overflow loss and standby open circuit loss, hydraulic temperature is low without the need to water-cooled, and noise is little, and hydraulic system element is few, fault is few, long life and low maintenance cost; The present invention has the overall merit (powder pressure adopts servo feedback precisely to control, saving power, and without cooling water, use simple and reliable, maintenance cost is low, and the life-span is long, without overflow noise) of each side, has good Social and economic benef@, is worth promoting.
Claims (10)
1. the hydraulic system isostatic pressed job control method for isostatic pressed powder compacting, powder to be formed to be poured in isostatic press in chamber, powder cave, by the isostatic compaction device in isostatic press, isostatic compaction is carried out to powder in chamber, powder cave, it is characterized in that, the isostatic compaction hydraulic work system of isostatic press takes servo control mode to control, and regulates motor speed and torsion precisely to control size and boosting, pressurize and the venting duration of emulsified liquid pressure in ram position, pressing speed, powder cave isostatic compaction device by servo mode.
2. as claimed in claim 1 for the hydraulic system isostatic pressed job control method of isostatic pressed powder compacting, it is characterized in that, the isostatic compaction hydraulic work system of described isostatic press is that what to take servo control mode to control is be pressed between frock at isostatic pressed oil cylinder and product to be provided with displacement of pressing head sensor, and sends isostatic pressed oil cylinder displacement data to control system and servo drive controller by displacement of pressing head sensor; Be pressed into frock at product and have pressurized cylinder, product is pressed between frock and pressurized cylinder and is provided with hydrostatic pressure sensor, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor send control system and servo drive controller to; On the HYDRAULIC CONTROL SYSTEM valve of isostatic press, be provided with the pressure transducer measuring hydraulic system pressure simultaneously, pressure transducer also sends the pressure data of hydraulic system to control system and servo drive controller, by control system and servo drive controller according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder, servocontrol is carried out to the actuating motor of hydraulic system.
3. as claimed in claim 2 for the hydraulic system isostatic pressed job control method of isostatic pressed powder compacting, it is characterized in that, described control system and servo drive controller adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor and duplex gear pump and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, PLC control system with AD and DA output is by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer come precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size, and boosting, pressurize and venting duration.
4., as claimed in claim 1 for the hydraulic system isostatic pressed job control method of isostatic pressed powder compacting, it is characterized in that, the control program of described servo control mode is as follows:
1) add powder: by powder adding device be on isostatic press chamber, powder cave perfusion powder;
2) shaping preparation: the last startup servopump of chamber, powder cave perfusion powder, servopump drives duplex gear pump to begin through the ram cylinder feed flow that hydraulic control valve is isostatic press, ram cylinder is down moved, until touch isostatic compaction device;
3) shaping: down to move at ram cylinder, after touching isostatic compaction device, ram cylinder continues down to move, now duplex gear pump starts to turn to high pressure for liquid status, ram cylinder drives the ratio pressurized cylinder motion be arranged on below isostatic pressed powder forming unit, and provide hydraulic coupling by the supercharging of ratio pressurized cylinder to the isostatic tooling in isostatic pressed powder forming unit, make the shaping dense green of powder in chamber, powder cave;
4) pressurize: oil cylinder pressure head presses down to be stablized after isostatic compaction device makes powder cave hydraulic pressure reach process set value and to keep certain hour;
5) release: powder cave hydraulic pressure value unloads from process set value the process being pressed onto zero in the certain hour of setting;
6) standby: hydraulic system not operation, only maintain an oil cylinder and do not slip the hydraulic system underflow of cylinder and the running state of base pressure;
7) unload location, base position: after isostatic compaction, oil cylinder pressure head drive core bar and powder base upwards precision positioning rise to and unload base position.
5. one kind realizes the isostatic pressed powder compacting hydraulic system of hydraulic system isostatic pressed job control method described in claim 1, comprise isostatic compaction device and isostatic compaction hydraulic system, isostatic compaction device is linked together by oil hydraulic circuit and isostatic compaction hydraulic system, and provide operation hydraulic pressure by isostatic compaction hydraulic system, it is characterized in that, isostatic compaction hydraulic system adopts servo mode to control, the main shaft of the hydraulic-pressure pump of isostatic press connects actuating motor, hydraulic-pressure pump is dragged by actuating motor, by hydraulic control valve, hydraulic oil is supplied to the action oil cylinder of isostatic press by hydraulic-pressure pump again, and regulate motor speed and torsion precisely to control the ram position of isostatic press by servo mode, pressing speed, and the size of powder cave hydrostatic pressure and boosting pressurize and venting duration.
6. isostatic pressed powder compacting hydraulic system as claimed in claim 5, it is characterized in that, the hydraulic-pressure pump of described isostatic press is duplex gear pump, duplex gear pump is connected in parallel on same duplex gear pump main shaft, duplex gear pump main shaft and servomotor spindle link together, and drive duplex gear pump main shaft rotary work by servomotor spindle.
7. isostatic pressed powder compacting hydraulic system as claimed in claim 5, it is characterized in that, described isostatic pressed oil cylinder and product are pressed between frock and are provided with displacement of pressing head sensor, and send isostatic pressed oil cylinder displacement data to control system and servo drive controller by displacement of pressing head sensor; Be pressed into frock at product and have pressurized cylinder, product is pressed between frock and pressurized cylinder and is provided with hydrostatic pressure sensor, and the isostatic pressed operational pressure data that product is pressed in frock by hydrostatic pressure sensor send control system and servo drive controller to; On the HYDRAULIC CONTROL SYSTEM valve of isostatic press, be provided with the pressure transducer measuring hydraulic system pressure simultaneously, pressure transducer also sends the pressure data of hydraulic system to control system and servo drive controller, by control system and servo drive controller according to displacement of pressing head sensing data, hydrostatic pressure sensor and pressure sensor data, according to set control program, by encoder, servocontrol is carried out to the actuating motor of hydraulic system.
8. isostatic pressed powder compacting hydraulic system as claimed in claim 7, it is characterized in that, described hydrostatic pressure sensor is powder cave emulsification hydraulic force snesor, the isostatic pressed chamber that powder cave emulsification hydraulic force snesor is pressed into product in frock respectively by a threeway is communicated with isostatic pressed emulsified liquid entrance, obtained the emulsified liquid pressure of isostatic pressed chamber and isostatic pressed emulsified liquid entrance by powder cave emulsification hydraulic force snesor, and send control system and servo drive controller to.
9. isostatic pressed powder compacting hydraulic system as claimed in claim 7, it is characterized in that, described control system and servo drive controller adopt PLC control system to control, PLC control system exports with AD and DA, servopump hydraulic system does the main driving of power by actuating motor and duplex gear pump and hydrovalve control loop, oil hydraulic cylinder is worked and is performed output, and the PLC control system that band AD and DA exports comes precise hard_drawn tuhes displacement of pressing head and hydraulic pressure size by displacement of pressing head sensing data, hydrostatic pressure sensor and pressure transducer.
10. isostatic pressed powder compacting hydraulic system as claimed in claim 5, it is characterized in that, cooling system is provided with between described hydraulic control valve and hydraulic reservoir, cooling system is arranged on hydraulic control valve oil return and exports among the oil return pipeline of hydraulic reservoir, cooling system hydraulic return system fuel tank again after cooling the hydraulic oil of discharging from operation oil cylinder.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224332A (en) * | 2016-08-31 | 2016-12-14 | 南京大地水刀股份有限公司 | A kind of electricity servo extra high voltage system and operating principle thereof |
| CN106402064A (en) * | 2016-05-06 | 2017-02-15 | 江苏金泽重型机械有限公司 | Hydraulic system of tear bomb powder hydraulic machine |
| CN107359130A (en) * | 2017-07-07 | 2017-11-17 | 天津大学 | A kind of power model full-automatic heat pressing molding device |
| CN111356845A (en) * | 2017-07-14 | 2020-06-30 | 液压开采***公司 | Hydraulic actuator cylinder and device using at least one such cylinder |
| WO2021055800A1 (en) * | 2019-09-19 | 2021-03-25 | Flow International Corporation | Systems and methods of interim and end of process treatment of manufactured articles using high pressure and waterjets |
| CN112648245A (en) * | 2020-12-22 | 2021-04-13 | 苏州铁马自动化科技有限公司 | Electro-hydraulic servo equipment for tablet press |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951042A (en) * | 1974-03-29 | 1976-04-20 | Weiss Adolf F | Apparatus for stroke control in high pressure machinery |
| JPH10314999A (en) * | 1997-05-13 | 1998-12-02 | Toyooki Kogyo Co Ltd | Hydraulic pressurized machining device |
| CN2488682Y (en) * | 2001-06-13 | 2002-05-01 | 王先良 | Equal static pressure machine with cavity in oiling type |
| CN201196176Y (en) * | 2008-04-18 | 2009-02-18 | 山东理工大学 | Liquid filling device of hydraulic cylinder controlled by reversal valve |
| CN202062695U (en) * | 2010-12-30 | 2011-12-07 | 南通国谊锻压机床有限公司 | Hydraulic-machine servo-pump control system |
| DE102013212155A1 (en) * | 2013-04-05 | 2014-10-09 | Robert Bosch Gmbh | Vibration damping of a operated by a variable speed hydraulic pump hydraulic actuator |
-
2015
- 2015-08-10 CN CN201510485143.0A patent/CN105020208B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951042A (en) * | 1974-03-29 | 1976-04-20 | Weiss Adolf F | Apparatus for stroke control in high pressure machinery |
| JPH10314999A (en) * | 1997-05-13 | 1998-12-02 | Toyooki Kogyo Co Ltd | Hydraulic pressurized machining device |
| CN2488682Y (en) * | 2001-06-13 | 2002-05-01 | 王先良 | Equal static pressure machine with cavity in oiling type |
| CN201196176Y (en) * | 2008-04-18 | 2009-02-18 | 山东理工大学 | Liquid filling device of hydraulic cylinder controlled by reversal valve |
| CN202062695U (en) * | 2010-12-30 | 2011-12-07 | 南通国谊锻压机床有限公司 | Hydraulic-machine servo-pump control system |
| DE102013212155A1 (en) * | 2013-04-05 | 2014-10-09 | Robert Bosch Gmbh | Vibration damping of a operated by a variable speed hydraulic pump hydraulic actuator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402064A (en) * | 2016-05-06 | 2017-02-15 | 江苏金泽重型机械有限公司 | Hydraulic system of tear bomb powder hydraulic machine |
| CN106224332A (en) * | 2016-08-31 | 2016-12-14 | 南京大地水刀股份有限公司 | A kind of electricity servo extra high voltage system and operating principle thereof |
| CN107359130A (en) * | 2017-07-07 | 2017-11-17 | 天津大学 | A kind of power model full-automatic heat pressing molding device |
| CN107359130B (en) * | 2017-07-07 | 2023-06-27 | 天津大学 | Full-automatic hot briquetting device of power module |
| CN111356845A (en) * | 2017-07-14 | 2020-06-30 | 液压开采***公司 | Hydraulic actuator cylinder and device using at least one such cylinder |
| WO2021055800A1 (en) * | 2019-09-19 | 2021-03-25 | Flow International Corporation | Systems and methods of interim and end of process treatment of manufactured articles using high pressure and waterjets |
| CN112648245A (en) * | 2020-12-22 | 2021-04-13 | 苏州铁马自动化科技有限公司 | Electro-hydraulic servo equipment for tablet press |
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Address after: 412001 No. 68 Hongqi Road North, Hunan, Zhuzhou Patentee after: Weichai torch Technology Co.,Ltd. Address before: 412001 No. 68 Hongqi Road North, Hunan, Zhuzhou Patentee before: ZHUZHOU TORCH SPARKPLUG Co.,Ltd. |