CN102755858B - The electrically driven (operated) diamond press of a kind of band - Google Patents
The electrically driven (operated) diamond press of a kind of band Download PDFInfo
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- CN102755858B CN102755858B CN201110113475.8A CN201110113475A CN102755858B CN 102755858 B CN102755858 B CN 102755858B CN 201110113475 A CN201110113475 A CN 201110113475A CN 102755858 B CN102755858 B CN 102755858B
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Abstract
The invention discloses the electrically driven (operated) diamond press of a kind of band, its electric device (11) promotes the plunger (30) of accurate kinetic piston cylinder (14) to do stretching motion by mechanical connecting device (12), extrude the fluid media (medium) in its cylinder body and enter the power cavity (25) of press master cylinder (23), exert a force to load object (20).Controller (31) generates the control signal of driver (32) according to external demand signal, the signal of sensor-based system (13,19,24,29) and built-in control algolithm, driver (32) provides corresponding curtage to drive electric device (11) accordingly, the UNICOM of switching device (27) switching hydraulic power unit (16) and accurate kinetic piston cylinder (14) and press master cylinder (23).Coarse positioning is responsible for by conventional hydraulic power set, and electric drive performs pressure and accurately controls, it is achieved the tracking of pressure curve and stable pressurize, it is provided that accurate high pressure or supertension.
Description
Technical field
No matter it is in high temperature insostatic pressing (HIP), isostatic cool pressing material manufacture equipment, and static pressure method prepares the synthesis of the superhard materials such as diamond and all be unable to do without press, no matter it is two top diamond press, or hexahedron synthetic diamond press, its pressure controling precision determines the performance of press.The present invention proposes a kind of high accuracy press, particularly a kind of diamond press with motorized motions for material preparation just.
Background technology
Since December in 1963 China's first diamond of synthesis on the 6th, current domestic production producer has more than hundreds of family, and 2010 annual capacities reach more than 50 hundred million carats, and diamond total output and export volume have occupied the first in the world.
The volume of production of world's diamond and consumption are often average annual with the speed increment higher than 10%, and particularly top grade, high-quality, high intensity, coarse grained diamond demand increase faster.But according to customs statistics, China still has the high quality synthetic diamond dependence on import of several hundred million carats every year, is primarily due to domestic diamond synthesizing process and equipment is relatively low, the diamond of production mostly is low grade diamond.Over several years, the cubic hinge press of unique distinct Chinese characteristics and synthesis technique achieve and develop on a large scale very much, but the overall technology level of China's Synthetic Diamond Industry and Foreign Advanced Lerel have bigger gap and have the trend progressively widened.
External DeBeers company (Britain), GE company (U.S.), the Winter company of Germany, Dongming company of Japan and Sumitomo company, Korea S the offshore company such as ILJIN and SANMEI company still in occupation of leading position.What the diamond synthesis press of external main flow adopted is single potential source three pillar type belt type press of the U.S., mostly have employed the computer automatic control system of advanced person, achieve stability and the repeatability of press supertension and superhigh temperature preferably, it is ensured that the technological parameter multistage continually varying such as pressure, temperature automatically controls.Except except the greater advantage in Tool and Die Technology, synthesis technique level etc., diamond press and control technique functions decisive role.GE company and DeBeers have monopolized the market of world's top grade diamond substantially.
It is identical that typical cubic apparatus, two sides push up the ultimate principle of man-made diamond pressing machine, all it is made up of host computer system, electric-control system, hydraulic system, aid system, power is provided by hydraulic system, fluid pressure is by hydraulic system to supercharger, master cylinder, after being delivered to top hammer by master cylinder again, remake the pressure condition of the diamond synthesizing forming synthesis intracavity on the Synthetic block using synthesis chamber.
When satisfied temperature, the height of the pressure precision of the supertension in synthetic cavity and steadily determine for a long time the yield of high quality diamond.
The hydraulic system of typical cubic diamond press is made up of axial plunger pump, supercharger, two seven logical valve, six master cylinders etc., realize pressurize, ftercompction, feeding control accuracy (list of references: [1] Fang Xiaohu. China's superhard material new technique and development. Hefei: publishing house of Chinese University of Science and Technology, 2004；[2] Qin Yu, institute makes the country prosperous. the import and export situation of China's superhard material and goods thereof. and diamond and grinding materials and grinding tool engineering .2003, (6): 70-74).
Home and abroad specially and and research mostly done a lot of explorations around many aspects such as relevant electric control system, Automatic Control Strategy, hydraulic component and hydraulic systems.Particularly in man-made diamond pressing machine most important pressure stability link pressurize link, take various measure and method.Such as: improve and seal structure and material minimizing leakage rate and increase the reliability sealed；Adopt large and small pump to configure, reduce pressure oscillation amplitude with little pump repairing；Direct super-pressure pump replaces pressurized cylinder to reduce leakage link；Employing advanced control system and Advanced Control Strategies control the measures such as the degree of accuracy of pressure so that the pressure precision of current man-made diamond pressing machine turbocharger inlet end reaches 0.1MPa.
But, what diamond press used is all conventional hydraulic system, be based on sealings, throttling control, positive displacement pump hydraulic transmission principle set up.The pressure output of the hydraulic pump of positive displacement has pressure fluctuation, is sealed with leakage and lost efficacy, and throttling has heating and noise.After excess pressure is amplified, the pressure oscillation in synthetic cavity can be bigger.If the power of diamond press is entirely derived from conventional hydraulic system, cannot thoroughly solve principle that pressurize is unreliable, ftercompction fluctuation, pressure drift, accurately control the series of problems such as difficulty, energy consumption is big, noise is big, heating is many.
The present invention is just for the hydraulic system Problems existing of conventional PCD press, a kind of novel electrically driven (operated) high-precision pressure generating mode is proposed, when coarse positioning, big stroke fully with the power of existing hydraulic system, and use electric drive in high-precision packing stage, pressure tracking stage, and by the piston displacement of machinery drive accurate kinetic piston cylinder, squeeze out the high-pressure fluid piston pressurization to press master cylinder.Thus quick consequent pressure change, maintain in pressure cavity stable, keep high-precision ultra high pressure condition, overall improve hydraulic system efficiency, reduce energy consumption.
The present invention is expected to make the pressure condition required by current man-made diamond pressing machine be greatly improved, it is achieved more accurate hyperpressure controls, and provides new process conditions for artificial diamond synthesizing.There is provided possible technological reserve for the transformation of the current existing diamond press of China, upgrading, have broad application prospects.
Summary of the invention
Hydraulic system Problems existing for conventional PCD press, the present invention proposes a kind of electrically driven (operated) diamond press of novel band, by whole modes being hydraulically operated of prior art, the coarse positioning stage changing big stroke into is driven by conventional hydraulic power set, and the accurate pressure control stage that pressurize and pressure curve are followed the tracks of is performed by electric drive, so that the Stress control of press master cylinder is more fine, the pressure curve of technological requirement can be quickly responded and follow the tracks of simultaneously.
The electrically driven (operated) diamond press of one band of the present invention, including main frame, press master cylinder, accurate kinetic piston cylinder, switching device, electric device, mechanical connecting device, driver, sensor-based system, controller, hydraulic power unit, press master cylinder is arranged in main frame, and be connected with accurate kinetic piston cylinder and hydraulic power unit by switching device and oil circuit, electric device is connected with the plunger of accurate kinetic piston cylinder by mechanical connecting device, controller is according to the signal of external control instruction and sensor-based system, and built-in control algolithm generates controlled quentity controlled variable, driver receives controlled quentity controlled variable and provides corresponding curtage to drive electric device, switching device is switched on and off the UNICOM of press master cylinder and hydraulic power unit and accurate kinetic piston cylinder.
The electrically driven (operated) diamond press of one band of the present invention, its electric device by mechanical connecting device promote accurate kinetic piston cylinder plunger do stretch, motion of contracting.
The electrically driven (operated) diamond press of one band of the present invention, has at least a press master cylinder, and the fluid dynamic that hydraulic power unit provides completes the coarse positioning of press master cylinder.
A kind of accurate kinetic piston cylinder with electrically driven (operated) diamond press of the present invention, its cylinder body is provided with one or more plunger, movable sealing is had between plunger and cylinder body, the end, one end of all plungers is connected with mechanical connecting device, the cavity volume of its cylinder interior oil-out on cylinder body and oil pipe by switching device and press master cylinder UNICOM.
The electrically driven (operated) diamond press of one band of the present invention, the feedback signal that the pressure signal of the power cavity of press master cylinder controls as system constitutes pressure closed-loop control system.
Conventional diamond press, except the body of basic mechanical main frame, generally constitute and be all made up of press master cylinder, oil piping system, pumping plant, sensor-based system, control system, also to have supercharger to produce supertension, or generate supertension with supertension slippage pump.
The electrically driven (operated) diamond press of one band of the present invention, except main frame, including press master cylinder, accurate kinetic piston cylinder, electric device, mechanical connecting device, driver, sensor-based system, controller, switching device, hydraulic power unit, and other auxiliary device such as pipeline.The main frame of diamond press is mainly constituted by including body, pedestal, hinge beam etc., pedestal is installed with body, body is provided with hinge beam, and each press master cylinder is arranged in hinge beam, and strength is passed to body by pin by the ear of hinge beam.The electrically driven (operated) diamond press of one band of the present invention, has at least a press master cylinder.
Press master cylinder is the main effect oil cylinder of diamond press, and it is responsible for realizing the pressure output of pressure system, and the piston of press master cylinder drives load object.In load object motion before and after, the piston of press master cylinder is usually with load object and to separate a segment distance, it is simple to the installation and removal of load object.The piston of this press master cylinder start from load object motion before stop position move to and the contact position of load object, and return to original starting position from the contact position of load object again, the piston stroke of this section is for the idle stroke that press master cylinder is low-power output, and also referred to as coarse positioning, it is directly to be driven by the hydraulic power unit of press system.
The head of press master cylinder is pressed with the top hammer of hard alloy typically via pressure ring, acts on Synthetic block again through top hammer.
Load object refers to the object that the power of the press master cylinder output of press system acts on, the Synthetic block assembly of such as diamond press, and load refers to the resistance overcome in the link of all power consumption works done of system, common are inertia load, friction load, elastic load, sticky load etc..
Hydraulic power unit includes the auxiliary device such as the pump of hydraulic system of routine, valve, motor, fuel tank, oil filter, pipeline, valve block.Hydraulic power unit in the present invention has only to the power during idle stroke providing press master cylinder, and now the location of the piston of press master cylinder is coarse positioning.Now coarse positioning action: the piston crown of press master cylinder from original position move to position with load object very close to, or just contact, or the position substantially contacted, the other action of coarse positioning be the piston crown of press master cylinder from the action returning to original position with load object contact position, the coarse positioning of press main oil cylinder piston has two processes having a try.
Coarse positioning action is big stroke, it does not have the requirement of higher positioning precision.The power of the hydraulic power unit completing coarse positioning can be designed to less, and structure is also simple a lot, it is not necessary to complete pressurize, pressure curve follows the tracks of the precise movement under such high pressure.
Hydraulic power unit is connected with press master cylinder by oil pipe and switching device, and switching device is responsible for cutting off the oil circuit UNICOM of hydraulic power unit and press master cylinder after coarse positioning completes, and is also turned on the oil circuit UNICOM of accurate kinetic piston cylinder and press master cylinder.Hydraulic power unit is connected by pipeline with the hydraulic medium of the fluid media (medium) in accurate kinetic piston cylinder with press master cylinder, and is selected the switching of oil circuit between path by switching device.The action of switching device is specified by the controller of press system.
Hydraulic power unit is directly connected to by oil pipe and switching device and press master cylinder, switching device is responsible for cutting off the oil circuit UNICOM of hydraulic power unit and press master cylinder after idle stroke completes, and is also turned on the oil circuit UNICOM of accurate kinetic piston cylinder and press master cylinder.Fluid media (medium) in hydraulic power unit and accurate kinetic piston cylinder separately passes through pipeline UNICOM with the hydraulic medium of press master cylinder, and is selected the switching of oil circuit between path by switching device.The action of switching device is specified by the controller of press system.
Can mutually moving and have movable sealing between cylinder body and the plunger of accurate kinetic piston cylinder, its plunger can stretch out in cylinder body, indentation.The cylinder interior of accurate kinetic piston cylinder is cavity volume, its cylinder body there is oil-out by cavity volume by oil pipe and switching device and press master cylinder UNICOM, its cylinder body has the plunger of one or more accurate kinetic piston cylinder, the end, one end of all plungers is connected with one end of mechanical connecting device, and the other end of mechanical connecting device connects electric device.The expanding-contracting action of all plungers of accurate kinetic piston cylinder is all driven by mechanical connecting device by electric device, mechanical connecting device transmission electric device output power or moment, and produce thrust promote accurate kinetic piston cylinder plunger do stretch, motion of contracting.
Accurate kinetic piston cylinder is structurally and functionally being different from the hydraulic intensifier of routine, it it not the amplifying device of the fluid-operated hydraulic coupling of conventional hydraulic intensifier, as long as its internal hydraulic pressure cavity volume can have the stretching motion of the plunger of enough space accurate kinetic piston cylinders, the cavity volume of accurate kinetic piston cylinder and the shape of external structure are not limit, but have oil-out in the outside of its cylinder body.
In switching device by after accurate kinetic piston cylinder and press master cylinder UNICOM, the plunger of accurate kinetic piston cylinder do in accurate kinetic piston cylinder stretch, motion of contracting, its plunger volume shared by the cylinder body cavity volume of the fixed volume of accurate kinetic piston cylinder changes therewith.When plunger stretches out accurate kinetic piston cylinder, plunger volume shared by the cylinder body of accurate kinetic piston cylinder reduces, the pressure oil being extruded in the cylinder body of accurate kinetic piston cylinder is just corresponding to be reduced, the fluid media (medium) being input in the power cavity in press master cylinder also reduces accordingly, and the pressure in press master cylinder power cavity also declines therewith；During the cylinder body of plunger retraction accurate kinetic piston cylinder, plunger volume shared by the cylinder body of accurate kinetic piston cylinder increases, the amount that pressure oil in the cylinder body of accurate kinetic piston cylinder is extruded is just corresponding to be increased, the fluid media (medium) being input in press master cylinder power cavity also increases accordingly, and the pressure in press master cylinder power cavity also increases.
Press master cylinder power cavity promotes, after referring to that pressure oil enters, the oil cylinder cavity that the piston of press master cylinder moves to load object orientation, and the fluid media (medium) in this cavity promotes piston advances forward to apply power to load object.
Pressure in this press master cylinder power cavity is with the stretching, contract and change of plunger of accurate kinetic piston cylinder, namely the displacement stretched, contract of the plunger accurately controlling accurate kinetic piston cylinder is accurately controlled the pressure in press master cylinder power cavity, here it is the ultimate principle that the pressure of the present invention accurately controls.
The plunger of accurate kinetic piston cylinder do in accurate kinetic piston cylinder stretch, motion of contracting, constant in load or change less time, the speed of motion determines the speed of the change of system pressure output, the size of the displacement of motion can change the amplitude of pressure change, and the control accuracy of the displacement of motion determines the control accuracy of system pressure output.
The diameter of plunger of accurate kinetic piston cylinder and stroke can according to the requirements of the length of system dwell time, control accuracy, and the size comprehensive Design of system power.Pressurize refers to that the pressure in press master cylinder is maintained at a certain steady state value.
The number of accurate kinetic piston cylinder is according to the topology layout of system, watt level, and the requirement comprehensive Design that system is to control accuracy and frequency response, simultaneously it is contemplated that the demand of maximum stream flow when system accurate pressure adjusts.
The piston of accurate kinetic piston cylinder is promoted by mechanical connecting device by electric device, the feedback signal of controller foundation external demand signal and sensor-based system and control algolithm generate the control signal of driver, and driver provides corresponding curtage to drive electric device according to control signal.
Sensor-based system includes the pressure transducer in accurate kinetic piston cylinder plunger and the displacement transducer of press main oil cylinder piston, accurate kinetic piston cylinder and press master cylinder power cavity, and corresponding signal processing and signal transmission system.Meanwhile, the acquisition process of other signals such as the temperature of system, vibration, noise is also included.
Particularly, the feedback signal that the pressure signal of the power cavity of the press master cylinder of press system controls as system, constitute pressure closed-loop control system.The composition of this closed-loop control system: input is external control instruction, output is the pressure of the pressure chamber of press master cylinder, actuator is ' electric device+accurate kinetic piston cylinder+press master cylinder ', also has the built-in controller of control algolithm, and the driver of driving electric device, feedback signal is the pressure signal of the power cavity of press master cylinder.
Controller is the control part of pressure closed-loop control system, has the interface connecting sensor-based system and external control instruction, has transmission controlled quentity controlled variable to the interface of driver simultaneously.The feedback signal of controller foundation external demand signal and sensor-based system and control algolithm generate the control signal of driver, and driver provides corresponding curtage to drive electric device according to control signal.
External control instruction is the determined pressure curve of the technological requirement according to diamond press system and the pressure controlled desired value that generates, and other action command of diamond press its exterior.The built-in control algolithm of controller can complete after receiving external control instruction: compares the size of feedback signal and external control instruction, generates the controlled quentity controlled variable of corresponding driver, it is intended that the switching action of switching device and other action of press system.
Pressure curve is required by the processing technique of diamond press equipment, the pressure of the press master cylinder power cavity in the diamond press whole working cycle and the function relation curve of time.
The size of the controlled quentity controlled variable that driver gives according to controller, it is provided that to the electric energy that electric device corresponding power output is required, the change that this electric energy is by curtage embodies, and the waveform of change curtage can change the size driving power.Driver to meet the power demand of the electric device various motions in rated power, and controls motion mode and the kinematic parameter of electric device.The startup of electric device, acceleration, deceleration, at the uniform velocity, the motion mode such as stopping, and the realization of corresponding kinematic parameter (acceleration, speed, power, moment, moment of torsion etc.) is all that driver is given and control.
Electric device, it is able to convert electrical energy into the device of mechanical energy.Electric device in the present invention can be the power-jdriven gear of the forms such as electric rotating machine, linear electric motors, electromagnetic actuator device, its outfan is connected with mechanical connecting device, and imparted power to the plunger of accurate kinetic piston cylinder by mechanical connecting device, drive the plunger of accurate kinetic piston cylinder do in cylinder body stretch accordingly, motion of contracting.
The electrically driven (operated) diamond press of band of the present invention, drive with hydraulic power unit when system coarse positioning, accurately control stage electricity consumption type of drive at pressure and drive, it is possible to the quickly change of responsive load, keep pressure steady, here it is the work characteristics of the press of the present invention.
Owing to the present invention proposes the high-precision pressure generating mode of a kind of novel electrically driven (operated) diamond press, revolutionize the single hydraulic transmission mode of tradition diamond press, achieve very fast responding system pressure, the change of the information such as displacement, thus the overall efficiency improving diamond press, reduce energy consumption, and reach to maintain the high-precision pressure condition of diamond press, it is expected to make the pressure condition required by current diamond press be greatly improved, realize more accurate Stress control, transformation for diamond press, upgrading provides possible technological reserve, have broad application prospects.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation with electrically driven (operated) diamond press system.
Accompanying drawing 2 is the pressue-graph of the working cycle of a kind of diamond press.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments is described.
Electric device 11 in accompanying drawing 1 is the device converting electrical energy into mechanical energy, optional choosing dress electric rotating machine, linear electric motors, electromagnet driving device etc., if electric device 11 is electric rotating machine, it can be the device of rectilinear motion by convert rotational motion that corresponding mechanical connecting device 12 may be selected by ball-screw etc., if electric device 11 is linear electric motors or other straight-line electric Magnet driving device, mechanical connecting device 12 may be designed to be mechanically connected reliably.The energy that changes mechanical energy is rectilinear motion that electric device 11 is passed over by mechanical connecting device 12.One end of mechanical connecting device 12 is connected with electric device 11, and the other end is connected with the head of the plunger 30 of accurate kinetic piston cylinder 14.
Ball-screw to adjust gapless or gap is only small, and mechanical connecting device 12 is connected with the head of the plunger 30 of accurate kinetic piston cylinder 14 and the connection of electric device 11 will be reliable.By Machine Design and processing, it is reliably connected and can easily realize.
There is a cavity volume inside of the cylinder body of accurate kinetic piston cylinder 14, the pressure oil outlet of the side of the cylinder body of this cavity volume and accurate kinetic piston cylinder 14, it is connected with switching device 27 by oil circuit 28, switching device 27 is connected with hydraulic power unit 16 also by oil circuit 15, and switching device 27 is connected with the ante-chamber 22 separated by the piston 21 of press master cylinder 23, back cavity 25 respectively also by oil circuit 17,18.Back cavity 25 is the power cavity of press master cylinder 23, and thus the fluid media (medium) in chamber promotes the piston advances forward of press master cylinder, and applies power F to load object 20.The power cavity 25 of press master cylinder 23 is connected with switching device 27 by oil pipe 26.
When press system carries out coarse positioning, when the piston 21 of press master cylinder 23 to travel forward, oil circuit between the back cavity 25 of switching device 27 UNICOM hydraulic power unit 16 and press master cylinder 23, cut off the oil circuit between the back cavity 25 of press master cylinder 23 and accurate kinetic piston cylinder 14 simultaneously, allow the oil return of ante-chamber 22 of press master cylinder 23 can be returned in hydraulic power unit 16 by oil circuit 18 simultaneously.The hydraulic power that now hydraulic power unit 16 provides promotes the piston 21 of press master cylinder 23 to travel forward, and near load object 20, until contacting or very close to load object 20, completes the coarse positioning action forward of press master cylinder 23.
During press system unloading, press system need to complete the coarse positioning action backward of the piston 21 of press master cylinder 23.Now, oil circuit between the ante-chamber 22 of switching device 27 UNICOM hydraulic power unit 16 and press master cylinder 23, hydraulic power unit 16 is allowed to provide fluid dynamic the anti-piston 21 pushing owner's oil cylinder 23, the simultaneously oil pipe 26 between the back cavity 25 of switching device 27 UNICOM press master cylinder 23 and accurate kinetic piston cylinder 14, the plunger 30 allowing accurate kinetic piston cylinder 14 stretches out playback backward, switching device 27 also wants back cavity 25 and the hydraulic power unit 16 of UNICOM's press master cylinder 23 so that the hydraulic oil oil sump tank of part excess traffic.At this moment, hydraulic power unit 16 provide fluid dynamic promote under, press master cylinder 23 piston 21 be returned to starting position, for next time load prepare, whole press system completes the overall process of coarse positioning forward, backward.
When press system carries out after coarse positioning forward completes, when press system needs pressurization, pressurize or tracking pressure curve to carry out accurate pressure control according to technological requirement, switching device 27 cuts off the oil circuit between the back cavity 25 of hydraulic power unit 16 and press master cylinder 23, the simultaneously oil circuit 26 between the back cavity 25 of UNICOM's press master cylinder 23 and accurate kinetic piston cylinder 14, while continuing to the oil return of ante-chamber 22 of press master cylinder 23 can be returned in hydraulic power unit 16 by oil circuit 18.
When accurate pressure controls, controller 31 receives the signal of the pressure transducer 24 of the back cavity 25 including the signal of displacement transducer 13 of plunger 30 of accurate kinetic piston cylinder 14, the signal of displacement transducer 19 of piston 21 of press master cylinder 23, the signal of pressure transducer 29 of accurate kinetic piston cylinder 14, press master cylinder 23 and other sensor signal of press system.Meanwhile, also receive external control instruction, and according to built-in control algolithm, provide controlled quentity controlled variable and be transferred to driver 32.Driver 32 provides correspondingly sized curtage to drive electric device 11 according to the size of controlled quentity controlled variable, electric device 11 drives the plunger 30 of accurate kinetic piston cylinder 14 to carry out stretching, contracting motion by mechanical connecting device 12, thus the fluid media (medium) of the corresponding discharge squeezed out in the cavity of accurate kinetic piston cylinder 14, and the back cavity 25 of press master cylinder 23 is entered by oil pipe 28 and switching device 27, and then the piston 21 of promotion press master cylinder 23, and apply power F to load object 20.
The power that load object bears is corresponding with the pressure signal of the back cavity 25 of the press master cylinder 23 that pressure transducer 24 transmits, and the pressure signal that pressure transducer 24 transmits is as the pressure controlled feedback signal of whole system.
The signal of all sensor-based systems that the word " signal of all the sensors " in accompanying drawing 1 receives for controller 31, including the signal of displacement transducer 13 of plunger 30 of accurate kinetic piston cylinder 14, the signal of displacement transducer 19 of piston 21 of press master cylinder 23, the signal of pressure transducer 29 of accurate kinetic piston cylinder 14, press master cylinder 23 the signal of pressure transducer 24 of back cavity 25, and other sensor signal such as the temperature of press system, noise, vibration (optional main signal, in figure not mark).
The feedback signal that the pressure transducer 24 received is transmitted by controller 31 compares with external command, and generates the foundation of next controlled quentity controlled variable as control algolithm.So constantly receiving feedback signal and compare with external command, regeneration controlled quentity controlled variable, the pressure of the back cavity 25 of press master cylinder 23 regulates again, is repeatedly performed down, it is possible to follow the tracks of the pressure curve of technological requirement continuously, it is achieved the closed loop control of pressure.The accuracy of feedback signal and the quality of control algolithm, and the power of external disturbance determines the rapidity of tracking accuracy and tracking.
Word " external control instruction " in accompanying drawing 1 refers to: the pressure controlled desired value generated according to the determined pressure curve of the technological requirement of press system, and other action command outside press system.And other action command of this outside includes other action as the switching action or press system specifying switching device 27, as: the corresponding actions such as press preheating, intensification, jerk, warning.
Accompanying drawing 2 gives the pressure curve of a kind of diamond press.Abscissa is time coordinate, represents with T, unit can be millisecond, the second, minute or hour；Vertical coordinate is the fluid pressure of press master cylinder back cavity, represents with P, and unit is atmospheric pressure (kg/cm2), kPa (KPa), MPa (MPa).
0～t in accompanying drawing 20Period, the pressure in diamond press master cylinder is less p0, it is now the coarse positioning stage, the piston 21 of press master cylinder 23 moves to close to load object orientation under the power that hydraulic power unit 16 provides, and load is less.t0～t1Section, the pressure in press master cylinder 23 is continuously increased, until reaching setting pressure p1Value, pressure now changes and is controlled by electric device 11.t1～t2Section, the pressure in press master cylinder 23 maintains steady state value p1, this section is press packing stage, it is desirable to be accurately controlled near steady state value, and pressure now is controlled by electric device 11.t2～t3Section, the pressure in press master cylinder constantly reduces, until being p0, system is in unloaded state.t3～t4Section, the pressure in press master cylinder is p0, load is less, and the piston 21 of press master cylinder 23 moves to close to load object opposite direction under the power that hydraulic power unit 16 provides, and moves to initial position, is now another positioning stage of coarse positioning.
Moment 0 in accompanying drawing 2 is to moment t4The whole period, the pressure controlled desired value of system be according to the initial pressure of technique initialization, dwell pressure, unloading pressure curve setting, the curve of pressure be exactly desired value set foundation.Diamond press system to follow the tracks of the realization of this pressure curve guarantee technique, and the precision of tracking is high, it is meant that the pressure in diamond press master cylinder power cavity is unanimously to change according to the requirement of pressure curve.
Claims (4)
- null1. it is with electrically driven (operated) diamond press for one kind，Including main frame、Press master cylinder、Accurate kinetic piston cylinder、Switching device、Electric device、Mechanical connecting device、Driver、Sensor-based system、Controller、Hydraulic power unit，Press master cylinder is arranged in main frame，And be connected with accurate kinetic piston cylinder and hydraulic power unit by switching device and oil circuit，Electric device is connected with the plunger of accurate kinetic piston cylinder by mechanical connecting device，The output signal of sensor each in system is transferred to controller by sensor-based system，It is characterized in that: controller is according to the pressure signal of external control instruction and the power cavity of the press master cylinder of sensor-based system feedback，And built-in control algolithm generates controlled quentity controlled variable，Driver receives controlled quentity controlled variable and provides corresponding curtage to drive electric device，Electric device is done by the plunger of mechanical connecting device promotion accurate kinetic piston cylinder to be stretched、Contracting motion，Controller also specifies switching device to be switched on and off the UNICOM of press master cylinder and hydraulic power unit and accurate kinetic piston cylinder.
- 2. the electrically driven (operated) diamond press of a kind of band as claimed in claim 1, it is characterised in that: have at least a press master cylinder.
- 3. the electrically driven (operated) diamond press of a kind of band as claimed in claim 1, it is characterised in that: the fluid dynamic that hydraulic power unit provides completes the coarse positioning of press master cylinder.
- 4. the electrically driven (operated) diamond press of a kind of band as claimed in claim 1, it is characterized in that: accurate kinetic piston cylinder body is provided with one or more plunger, movable sealing is had between plunger and cylinder body, the end, one end of all plungers is connected with mechanical connecting device, the cavity volume of its cylinder interior oil-out on cylinder body and oil pipe by switching device and press master cylinder UNICOM.
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| CN201110113475.8A CN102755858B (en) | 2011-04-25 | 2011-04-25 | The electrically driven (operated) diamond press of a kind of band |
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| CN201110113475.8A CN102755858B (en) | 2011-04-25 | 2011-04-25 | The electrically driven (operated) diamond press of a kind of band |
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| CN101007253A (en) * | 2006-12-27 | 2007-08-01 | 许宏 | Terminal pressure accurate control device of diamond pressure machine and controlling method |
| CN201043539Y (en) * | 2007-05-22 | 2008-04-02 | 河南中南工业有限责任公司 | Hexahedral pressing machine hydraulic control apparatus for differential oil supply in heating and pressure maintaining direction |
| CN201275477Y (en) * | 2008-10-07 | 2009-07-22 | 河南黄河实业集团股份有限公司 | Hydraulic system pressure control loop of hexahedron top press |
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| JPS59165112A (en) * | 1983-03-09 | 1984-09-18 | Sumitomo Electric Ind Ltd | Temperature control method of extra-high pressure generator |
| JPH105572A (en) * | 1996-06-27 | 1998-01-13 | Sumitomo Electric Ind Ltd | Method and device for synthesizing diamond crystal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007253A (en) * | 2006-12-27 | 2007-08-01 | 许宏 | Terminal pressure accurate control device of diamond pressure machine and controlling method |
| CN201043539Y (en) * | 2007-05-22 | 2008-04-02 | 河南中南工业有限责任公司 | Hexahedral pressing machine hydraulic control apparatus for differential oil supply in heating and pressure maintaining direction |
| CN201275477Y (en) * | 2008-10-07 | 2009-07-22 | 河南黄河实业集团股份有限公司 | Hydraulic system pressure control loop of hexahedron top press |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821478A (en) * | 2019-01-16 | 2019-05-31 | 焦作天宝桓祥机械科技有限公司 | A kind of efficient two face high pressure apparatus |
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| CN102755858A (en) | 2012-10-31 |
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