CN101618510B - Numerical control servo feedback type small-flow multi-head pump - Google Patents
Numerical control servo feedback type small-flow multi-head pump Download PDFInfo
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- CN101618510B CN101618510B CN 200910115726 CN200910115726A CN101618510B CN 101618510 B CN101618510 B CN 101618510B CN 200910115726 CN200910115726 CN 200910115726 CN 200910115726 A CN200910115726 A CN 200910115726A CN 101618510 B CN101618510 B CN 101618510B
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Abstract
The invention relates to a numerical control servo feedback type small-flow multi-head pump which is characterized in that the small-flow multi-head pump is connected with a servo motor by a coupling; the shutter scale is respectively connected with a measurement and feedback module unit and a machine tool workbench; the servo motor is connected with a speed loop module unit and a speed control unit; and the speed control unit is connected with the speed loop module unit and a position control module unit which is connected with the measurement and feedback module unit. The invention has the advantages that the numerical control servo feedback type small flow multi-head pump can ensure consistent oil supply amount through the control of an oil regulator according to different resistances of oil supply lines and lubricating points and feed back by adopting position error signals to regulate the servo motor.
Description
Technical field
The present invention relates to a kind of small-flow multi-head pump, relate in particular to a kind of numerical control servo feedback type small-flow multi-head pump.
Background technology
In current hydrostatic slideway technology, the multi-head pump system that extensively adopts common electric machine to drag comes to hydrostatic slideway bar oil pocket fuel feeding, thereby forms the rigidity oil film between the upper/lower guide.But small change can occur with the difference of workpiece deadweight and the variation of oil temperature in the rigidity of oil film and thickness.This type of small change will affect the positioning accuracy (Z axis) of heavy machine tool, thereby reduce the machining accuracy grade of heavy machine tool.
Summary of the invention
The object of the present invention is to provide a kind of numerical control servo feedback type small-flow multi-head pump, this multi-head pump uses the position measurement detecting unit of grating scale, install the workbench of heavy machine tool additional behind the processing work physical location sized data and transfer to position control module in the system, setting value in addition with original design, comparing calculation goes out correction, again with the speed control unit integrated treatment, thereby the instruction that the output perfect number quantizes, the control servomotor drags small-flow multi-head pump running with required precise rotation, output must and satisfy the flow of the correct floatation volume of hydrostatic slideway.
The present invention is achieved like this, it comprises small-flow multi-head pump, grating scale, measure and the feedback module unit, servomotor, the speed ring modular unit, speed control unit, the position control module unit, it is characterized in that small-flow multi-head pump connects servomotor by shaft coupling, grating scale connects respectively to be measured and feedback module unit and platen, servomotor connection speed ring modular unit and speed control unit, speed control unit link position control module unit, the position control module unit connects measures and the feedback module unit speed control unit connection speed ring modular unit.Numerical control servo feedback type small-flow multi-head pump can enter digital control system by the Position Control feedback loop by measurement and the feedback of grating scale, compares error amount with setting the primitive request value, converts digital command input position control module to; Simultaneously, speed ring is also with speed (rotating speed) feedback digital amount input position control module, after processing, comprehensive two groups of data issue instructions to speed (rotating speed) control module of digital control system, rotating speed in order to control and correction servomotor, thereby realize closed loop feedback control requirement, finally revised rotating speed and revised the minor variations of small-flow multi-head pump discharge, so that the floatation volume of heavy machine tool workbench reaches the dimension precision requirement of setting, improve the machining accuracy grade of heavy machine tool.
Small-flow multi-head pump of the present invention, it comprises the front pump housing, the rear pump housing, the sealing copper packing, the macro-axis core, connecting plate, oil-distributing plate, copper sheathing, little axle core, pinion, gear wheel, oil sealing, feed cover, connecting screw rod, plug, jump ring, the gear key, little plug, it is characterized in that the front pump housing connects the rear pump housing and forms cavity, be connected with the macro-axis core in the cavity, the macro-axis core connects gear wheel by the gear key, the gear wheel sidewall is connected with jump ring, gear wheel meshes some pinions, the little axle core of the coaxial connection of pinion, pinion connects oil-distributing plate, be connected with connecting plate between the oil-distributing plate, little axle core bottom is connected with little plug, macro-axis core front end and tail end correspondence are connected with oil sealing and plug, the plug top is connected with feed cover, be connected with connecting screw rod in the feed cover, the outer cylinder surface of macro-axis core and little axle core is connected with respectively copper sheathing, and the surface of the front pump housing and the rear pump housing is connected with respectively some sealing copper packings.Technique effect of the present invention is: the different resistances by its fuel feeding circuit and oil site, by the control of oil regulator, can guarantee consistent fuel delivery, and adopt the position error signal feedback, regulate servomotor.
Description of drawings
Fig. 1 is the general assembly drawing of band servomotor of the present invention.
Fig. 2 is the structural representation of small-flow multi-head pump of the present invention.
Fig. 3 is the structural representation of small-flow multi-head pump case of the present invention.
In the drawings, 1, the front pump housing 2, the rear pump housing 3, sealing copper packing 4, macro-axis core 5, connecting plate 6, oil-distributing plate 7, copper sheathing 8, little axle core 9, pinion 10, gear wheel 11, oil sealing 12, feed cover 13, connecting screw rod 14, plug 15, jump ring 16, gear key 17, little plug 18, small-flow multi-head pump 19, grating scale 20, measurement and feedback module unit 21, servomotor 22, speed ring modular unit 23, speed control unit 24, position control module unit
The specific embodiment
As shown in Figure 1, the present invention is achieved like this, it comprises small-flow multi-head pump 18, grating scale 19, measure and feedback module unit 20, servomotor 21, speed ring modular unit 22, speed control unit 23, position control module unit 24, it is characterized in that small-flow multi-head pump 18 connects servomotor 21 by shaft coupling, grating scale 19 connects respectively to be measured and feedback module unit 20 and platen, servomotor 21 connection speed ring modular unit 22 and speed control units 23, speed control unit 23 link position control module unit 24, position control module unit 24 connects measures and feedback module unit 20 speed control unit 23 connection speed ring modular units 22.
Such as Fig. 2, shown in Figure 3, the present invention is achieved like this, it comprises the front pump housing 1, the rear pump housing 2, sealing copper packing 3, macro-axis core 4, connecting plate 5, oil-distributing plate 6, copper sheathing 7, little axle core 8, pinion 9, gear wheel 10, oil sealing 11, feed cover 12, connecting screw rod 13, plug 14, jump ring 15, gear key 16, little plug 17, it is characterized in that the front pump housing 1 connects the rear pump housing 2 and forms cavitys, be connected with macro-axis core 4 in the cavity, macro-axis core 4 connects gear wheel 10 by gear key 16, gear wheel 10 sidewalls are connected with jump ring 15, the some pinions 9 of gear wheel 10 engagements, the little axle core 8 of pinion 9 coaxial connections, pinion 9 connects oil-distributing plate 6, be connected with connecting plate 5 between the oil-distributing plate 6, little axle core 8 bottoms are connected with little plug 17, and macro-axis core 4 tail ends are connected with plug 14, and plug 14 tops are connected with feed cover 12, be connected with connecting screw rod 13 in the feed cover 12, macro-axis core 4 front ends are connected with oil sealing 11, and the outer cylinder surface of macro-axis core 4 and little axle core 8 is connected with respectively copper sheathing 7, and the surface of the front pump housing 1 and the rear pump housing 2 is connected with respectively some sealing copper packings 3.
The present invention adopts independent numerical control module, with servo-drive and optical grating ruler measurement feedback position system, can connect with the digital control system of NC heavy lathe, forms a cover dynamic servo feedback control system, also can come separately, is used for the oil film thickness of hydrostatic slideway.Both but feedback compensation changed because of the oil film thickness of hydrostatic guide way that the different workpieces weight change causes, but also feedback compensation changes the oil film thickness variate that causes because of the hydrostatic slideway oil temperature.
The certainty of measurement of grating scale is μ m level, and the work top of heavy digital control machine tool weighs greatly, and its linearity reaches the machining accuracy grade that improves heavy machine tool all in 10 μ m levels so can effectively revise oil film thickness.And the installation of the installation of grating scale displacement transducer and vertical chi all has direct relation with certainty of measurement:
Generally will stand on the workbench (slide plate) that grating scale is installed in lathe, and move with the lathe feed, read head is fixed on the lathe bed, makes as far as possible read head be installed on the below of vertical chi.The selection of its mounting means must be noted that the direction of splashing down of smear metal, cutting fluid and fluid.According to the requirement of hardware circuit and digital control system function, we have designed software program owing to adopted temperature error and site error patch routine, can so that the as a result accuracy class that detects greatly improve.And these software systems have adopted Modular Structure Design, such as " position control module ", " speed control unit module ", " measurement feedback module " etc.Especially " measurement feedback module " directly affects the certainty of measurement of grating scale.Grating scale (sensor) is the photoelectricity electromechanical integrated structure, and surgery is the type aluminum.When variation of ambient temperature, must cause that the physical dimension change causes firm grid pitch to change, and brings the detection error.It is the examination criteria value when set environment temperature is 20 ℃, the displacement error that brings when comparing variations in temperature with standard value, immediately measure displacement error---temperature characteristics, go out error by characteristic curve fitting---the temperature equation, basis as the correction of software temperature error, used thereby work out out effective software, thereby reached effective correction effect.This is the core content that numerical control servo feedback type small-flow multi-head pump is implemented correction-compensation.Equally, after obtaining accurate measurement error value, position feedback control software program by establishment, the digital modeling of deployed position equation, the CNC Model relation that " position control module " and " speed control unit module " foundation is associated, thereby compare corresponding error amount, form closed loop feedback control with " measuring and feedback module ", efficient CPU calculation processing unit, so that whole round-off error becomes the dynamic feedback system of a high speed, thereby reach accurately the state of round-off error, make the oil film thickness of hydrostatic slideway be in dynamic exact value.And this type of dynamically and accurate oil film thickness value realizes controlling the small-flow multi-head pump flow-control by digital control system control servomotor rotating speed exactly.
Claims (1)
1. numerical control servo feedback type small-flow multi-head pump, it comprises small-flow multi-head pump, grating scale, measure and the feedback module unit, servomotor, the speed ring modular unit, speed control unit, the position control module unit, it is characterized in that small-flow multi-head pump connects servomotor by shaft coupling, grating scale connects respectively to be measured and feedback module unit and platen, servomotor connection speed ring modular unit and speed control unit, speed control unit link position control module unit, the position control module unit connects measures and the feedback module unit speed control unit connection speed ring modular unit;
Described small-flow multi-head pump comprises the front pump housing, the rear pump housing, the sealing copper packing, the macro-axis core, connecting plate, oil-distributing plate, copper sheathing, little axle core, pinion, gear wheel, oil sealing, feed cover, connecting screw rod, plug, jump ring, the gear key, little plug, the pump housing formed cavity after the front pump housing connected, be connected with the macro-axis core in the cavity, the macro-axis core connects gear wheel by the gear key, the gear wheel sidewall is connected with jump ring, gear wheel meshes some pinions, the little axle core of the coaxial connection of pinion, pinion connects oil-distributing plate, be connected with connecting plate between the oil-distributing plate, little axle core bottom is connected with little plug, macro-axis core front end and tail end correspondence are connected with oil sealing and plug, and the plug top is connected with feed cover, is connected with connecting screw rod in the feed cover, the outer cylinder surface of macro-axis core and little axle core is connected with respectively copper sheathing, and the surface of the front pump housing and the rear pump housing is connected with respectively some sealing copper packings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910115726 CN101618510B (en) | 2009-07-21 | 2009-07-21 | Numerical control servo feedback type small-flow multi-head pump |
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| CN 200910115726 CN101618510B (en) | 2009-07-21 | 2009-07-21 | Numerical control servo feedback type small-flow multi-head pump |
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| CN101618510A CN101618510A (en) | 2010-01-06 |
| CN101618510B true CN101618510B (en) | 2013-02-27 |
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| CN104308561A (en) * | 2014-09-19 | 2015-01-28 | 井冈山大学 | Static pressure guide rail oil film thickness feedback compensation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201427240Y (en) * | 2009-07-21 | 2010-03-24 | 安福唯冠油压机械有限公司 | Digital control servo feedback type mini-flow multi-head pump |
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| JP2001147719A (en) * | 1999-11-24 | 2001-05-29 | Yokogawa Electric Corp | Positioning device and stopping method therefor |
| CN2429295Y (en) * | 2000-01-08 | 2001-05-09 | 顾成 | Numerial controlled three-dimensional laser scanner and profiling and shaping machining-centers for curved rails |
| JP4323087B2 (en) * | 2000-12-22 | 2009-09-02 | 住友重機械工業株式会社 | XY stage device |
| CN2693408Y (en) * | 2003-10-22 | 2005-04-20 | 上海重型机床厂 | Fixed delivery pump frequency changing type hydraulic speed regulating arrangement |
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| CN201427240Y (en) * | 2009-07-21 | 2010-03-24 | 安福唯冠油压机械有限公司 | Digital control servo feedback type mini-flow multi-head pump |
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