CN102189412A - Active control closed-type hydrostatic guide rail - Google Patents
Active control closed-type hydrostatic guide rail Download PDFInfo
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- CN102189412A CN102189412A CN2011101245214A CN201110124521A CN102189412A CN 102189412 A CN102189412 A CN 102189412A CN 2011101245214 A CN2011101245214 A CN 2011101245214A CN 201110124521 A CN201110124521 A CN 201110124521A CN 102189412 A CN102189412 A CN 102189412A
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- guide rail
- proportional flow
- flow control
- proportional
- control valve
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Abstract
The invention discloses an active control closed-type hydrostatic guide rail belonging to the technical field of fluid transmission and control. Through the invention, the thickness of an oil film can be freely adjusted within a certain range and kept unchanged before and after encountering a loading force. The active control closed-type hydrostatic guide rail comprises a guide rail base which is provided with a guide rail movable component at the upper part, wherein a main hydrostatic cavity and an auxiliary hydrostatic cavity are arranged on the guide rail movable component. The active control closed-type hydrostatic guide rail is characterized in that the output end of a hydraulic pump is connected with the input ends of a first proportional flow valve and a second proportional flow valve respectively; the input end of an overflow valve is connected with the output end of the hydraulic pump; the input end of the hydraulic pump and the output end of the overflow valve are connected with an oil tank respectively; the output end of the first proportional flow valve is connected with the auxiliary hydrostatic cavity, and the output end of the second proportional flow valve is connected with the main hydrostatic valve; the control ends of the proportional flow valves are connected with a computer through a proportional amplifier respectively; and the output end of an electric vortex displacement sensor arranged on the guide rail movable component is connected with the computer through a data acquisition card.
Description
Technical field
The invention belongs to the Fluid Transmission and Control technical field, particularly relate to a kind of ACTIVE CONTROL closed hydrostatic slideway.
Background technology
In order to guarantee the service behaviour of machine tool guideway, not only require guide rail can realize that correct relative motion, kinematic accuracy are stable, also require it to have precision stability good, can bear the characteristic of bigger varying load.Particularly high-accuracy lathe, high to requirement on machining accuracy, this moment the creeping of common rail plate, float, the vibration resistance difference and the materials processing of shortcoming such as serious wear and kinematic accuracy instability and rolling guide requires high shortcoming can not satisfy the needs of high-accuracy machine tool guideway.Frictional resistance is minimum, the retentivity of kinematic accuracy is good, resistance to shock is good, bearing capacity is big and guide material is required advantages such as low and hydrostatic slideway has, and it is used widely in high-accuracy lathe.
Hydrostatic slideway is to feed pressure oil between the guide rail of two relative motions, under the effect of pressure, with moving component jack-up, is commonly referred to and floats.In the course of work, moving-member under motion or inactive state all the time and be the neat liquid Frotteurism between guide rail, thereby the frictional force when having reduced two guide pass relative motions greatly.
For the constant pressure type hydrostatic slideway, the foundation of oil pocket pressure and adjustment are to regulate according to the openings of sizes of the variation adjusting flow controller of load.Generally hydrostatic slideway is divided into open type static pressure guide rail and closed hydrostatic slideway two big classes.Open type static pressure guide rail can only bear unidirectional load, bears the ability of unbalance loading and tilting moment, and range of application is less; Closed hydrostatic slideway has opposed oil pocket, can bear the load of different directions and bear very big tilting moment, uses wider at high-accuracy and heavy machine tool.
Existing closed hydrostatic slideway is mainly selected the film throttling device for use or is turned round plate feedback flow controller and form a cover internal feedback control system.But it exists capillary and defective, especially film throttling devices such as the machining accuracy height of turning round plate, diaphragm use fatiguability destruction is to choose according to the result who calculates with turning round plate feedback flow controller.When practical application,, be difficult to guarantee the rigidity and the precision of hydrostatic slideway, thereby influence machining accuracy if primary condition changes.
Summary of the invention
At existing closed hydrostatic slideway above shortcomings, the invention provides and a kind ofly can regulate oil film thickness within the specific limits arbitrarily, and at the ACTIVE CONTROL closed hydrostatic slideway that is being subjected to before and after the load force oil film thickness being remained unchanged.
To achieve these goals, the present invention adopts following technical scheme, and a kind of ACTIVE CONTROL closed hydrostatic slideway comprises that top has the guiderail base of guide rail movable member, and described guide rail movable member is provided with main static pressure chamber and auxilliary static pressure chamber; Be characterized in, the hydraulic pressure delivery side of pump is connected with the input of first proportional flow control valve, second proportional flow control valve respectively, the input of overflow valve is connected with described hydraulic pressure delivery side of pump, and the input of described hydraulic pump, the output of overflow valve are connected with fuel tank respectively; The output of described first proportional flow control valve is connected with auxilliary static pressure chamber, and the output of described second proportional flow control valve is connected with main static pressure chamber; The control end of described first proportional flow control valve, second proportional flow control valve is connected with computer through first proportional amplifier, second proportional amplifier respectively; The output that is arranged on the eddy current displacement sensor on the described guide rail movable member is connected with computer through data collecting card.
Beneficial effect of the present invention:
1, the present invention adopts closed loop ACTIVE CONTROL method, and the The real time measure oil film thickness changes, and realizes changing damping and guarantees the constant of oil film thickness, thereby make the rigidity convergence infinity of machine tool guideway, has guaranteed the machining accuracy of lathe;
2, the present invention adopts Computer Control Technology, installation, debugging, easy to maintenance;
3, the present invention has avoided adopting the higher flow controller of processing request, has guaranteed the extensive adaptability of system.
Description of drawings
Fig. 1 is the structural representation of closed hydrostatic slideway of the present invention;
Wherein, 1-eddy current displacement sensor, 2-guiderail base, 3-guide rail movable member, 4-first proportional flow control valve, 5-second proportional flow control valve, the 6-overflow valve, the 7-hydraulic pump, 8-computer, 9-first proportional amplifier, 10-second proportional amplifier, the 11-data collecting card, 12-assists static pressure chamber, 13-master's static pressure chamber.
The specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, a kind of ACTIVE CONTROL closed hydrostatic slideway comprises that top has the guiderail base 2 of guide rail movable member 3, and described guide rail movable member 3 is provided with main static pressure chamber 13 and auxilliary static pressure chamber 12; The output of hydraulic pump 7 is connected with the input of first proportional flow control valve 4, second proportional flow control valve 5 respectively, the input of overflow valve 6 is connected with the output of described hydraulic pump 7, and the output of the input of described hydraulic pump 7, overflow valve 6 is connected with fuel tank respectively; The output of described first proportional flow control valve 4 is connected with auxilliary static pressure chamber 12, and the output of described second proportional flow control valve 5 is connected with main static pressure chamber 13; The control end of described first proportional flow control valve 4, second proportional flow control valve 5 is connected with computer 8 through first proportional amplifier 9, second proportional amplifier 10 respectively; The output that is arranged on the eddy current displacement sensor 1 on the described guide rail movable member 3 is connected with computer 8 through data collecting card 11.
Hydraulic pump 7 is by the hydraulic oil of overflow valve 6 control output certain flow and pressure, and hydraulic oil enters the opposed oil pocket of closed hydrostatic slideway, that is: auxilliary static pressure chamber 12 and main static pressure chamber 13 after through first proportional flow control valve 4, second proportional flow control valve 5 respectively.Eddy current displacement sensor 1 sends the physical location of detected guide rail movable member 3 to computer 8 by data collecting card 11, and the data of data collecting card 11 are recorded in the computer 8; Computer 8 compares the ideal value of this value and predefined oil film thickness, export two control signals then, size by first proportional amplifier 9 and second proportional amplifier, 10 control first proportional flow control valves 4 and second proportional flow control valve, 5 opening amounts, thereby change the damping of first proportional flow control valve 4, second proportional flow control valve 5, control the flow and the pressure of the liquid in flow through auxilliary static pressure chamber 12 and main static pressure chamber 13; Make the displacement of guide rail movable member 3 reach designated value, make guide rail after the effect that is subjected to load, can return to initial position, thereby realized the ACTIVE CONTROL of hydrostatic slideway oil film thickness.Described eddy current displacement sensor 1 is used to measure the distance between guide rail movable member 3 and the guiderail base 2, the i.e. thickness of oil film between guide rail.
The model that described eddy current displacement sensor 1 adopts is KD-2306-1SM, the model that described first proportional flow control valve 4 and second proportional flow control valve 5 adopt is 2FRE6A-2X/1LK4M, the model that described overflow valve 6 adopts is DBDH6P1X/50, the model that described first proportional amplifier 9 and second proportional amplifier 10 adopt is VT5010, and the model that described data collecting card 11 adopts is PCI-1710.
Claims (1)
1. an ACTIVE CONTROL closed hydrostatic slideway comprises that top has the guiderail base of guide rail movable member, and described guide rail movable member is provided with main static pressure chamber and auxilliary static pressure chamber; It is characterized in that, the hydraulic pressure delivery side of pump is connected with the input of first proportional flow control valve, second proportional flow control valve respectively, the input of overflow valve is connected with described hydraulic pressure delivery side of pump, and the input of described hydraulic pump, the output of overflow valve are connected with fuel tank respectively; The output of described first proportional flow control valve is connected with auxilliary static pressure chamber, and the output of described second proportional flow control valve is connected with main static pressure chamber; The control end of described first proportional flow control valve, second proportional flow control valve is connected with computer through first proportional amplifier, second proportional amplifier respectively; The output that is arranged on the eddy current displacement sensor on the described guide rail movable member is connected with computer through data collecting card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101245214A CN102189412A (en) | 2011-05-13 | 2011-05-13 | Active control closed-type hydrostatic guide rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101245214A CN102189412A (en) | 2011-05-13 | 2011-05-13 | Active control closed-type hydrostatic guide rail |
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| Publication Number | Publication Date |
|---|---|
| CN102189412A true CN102189412A (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101245214A Pending CN102189412A (en) | 2011-05-13 | 2011-05-13 | Active control closed-type hydrostatic guide rail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490077A (en) * | 2011-12-06 | 2012-06-13 | 厦门大学 | Vertical closed hydrostatic guideway perpendicularity error adjustment device |
| TWI458586B (en) * | 2012-08-21 | 2014-11-01 | Ind Tech Res Inst | Composite variable flow resistance hydrostatic plate bearing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630942A (en) * | 1984-01-20 | 1986-12-23 | Hitachi, Ltd. | Guiding apparatus |
| JPH0295529A (en) * | 1988-09-30 | 1990-04-06 | Okuma Mach Works Ltd | Static pressure guide method for movement body |
| CN1884861A (en) * | 2006-07-10 | 2006-12-27 | 潘旭华 | Static pressure guide rail employing multi-head constant displacement pump |
| CN201309077Y (en) * | 2008-12-11 | 2009-09-16 | 天水星火机床有限责任公司 | Protection device for vertical lathe worktable |
| CN201524911U (en) * | 2009-10-23 | 2010-07-14 | 山东鲁重数控机床股份有限公司 | Oil supply unit for static-pressure oil chamber of numerical control machine |
| CN201534283U (en) * | 2009-11-24 | 2010-07-28 | 天津市精诚机床制造有限公司 | Hydrostatic rail hydraulic system for revolving workbench of heavy numerical control cylindrical gear milling machine |
-
2011
- 2011-05-13 CN CN2011101245214A patent/CN102189412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630942A (en) * | 1984-01-20 | 1986-12-23 | Hitachi, Ltd. | Guiding apparatus |
| JPH0295529A (en) * | 1988-09-30 | 1990-04-06 | Okuma Mach Works Ltd | Static pressure guide method for movement body |
| CN1884861A (en) * | 2006-07-10 | 2006-12-27 | 潘旭华 | Static pressure guide rail employing multi-head constant displacement pump |
| CN201309077Y (en) * | 2008-12-11 | 2009-09-16 | 天水星火机床有限责任公司 | Protection device for vertical lathe worktable |
| CN201524911U (en) * | 2009-10-23 | 2010-07-14 | 山东鲁重数控机床股份有限公司 | Oil supply unit for static-pressure oil chamber of numerical control machine |
| CN201534283U (en) * | 2009-11-24 | 2010-07-28 | 天津市精诚机床制造有限公司 | Hydrostatic rail hydraulic system for revolving workbench of heavy numerical control cylindrical gear milling machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490077A (en) * | 2011-12-06 | 2012-06-13 | 厦门大学 | Vertical closed hydrostatic guideway perpendicularity error adjustment device |
| TWI458586B (en) * | 2012-08-21 | 2014-11-01 | Ind Tech Res Inst | Composite variable flow resistance hydrostatic plate bearing |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110921 |