CN103028954B - A kind of floating hydrostatic slideway of constant current constant voltage compound and control method thereof - Google Patents
A kind of floating hydrostatic slideway of constant current constant voltage compound and control method thereof Download PDFInfo
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- CN103028954B CN103028954B CN201210509407.8A CN201210509407A CN103028954B CN 103028954 B CN103028954 B CN 103028954B CN 201210509407 A CN201210509407 A CN 201210509407A CN 103028954 B CN103028954 B CN 103028954B
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Abstract
A kind of floating hydrostatic slideway of constant current constant voltage compound, comprise main guide rail (1), oppositely preload guide rail (2), base (3) and work top (4), described main guide rail (1) and the closed hydrostatic slideway that oppositely preloading guide rail (2) is formed support, main guide rail (1) is constant-current static-pressure guide rail, be made up of dynamic guide rail and quiet guide rail, the main guide rail (1) on work top 4 is the main guide rail (1) on dynamic guide rail, base (3) is quiet guide rail.Oppositely preload the floating hydrostatic slideway that guide rail (2) is constant current constant voltage compound.The floating hydrostatic slideway of constant current constant voltage compound of the present invention can meet the high low speed calibration function of turntable, assembly technology and control method simple and reliable.
Description
Technical field
The present invention is applied to the axially mounting system of large heavy type numerical control rotating table, belongs to advanced and manufactures and technical field of automation.Be specifically related to a kind of floating hydrostatic slideway and control method thereof of constant current constant voltage compound.
Background technology
" gear turning gear hobbing composite processing machine tool " and " large-scale, high-precision numerical control forming gear grinding machines " is classified as research contents by 2013 years " high-grade, digitally controlled machine tools and basic manufacturing equipment " scientific and technological key special subjects, and therefore high low speed NC rotary table also becomes a kind of important calibration functional part.The turning of top circle, endoporus and end face, grinding need turntable revolution at a high speed, rotating speed 10 ~ 50r/min; The generate gear hobbing of gear and plunge grinding need turntable to carry out low speed continuous precise calibration, rotating speed 0 ~ 5rpm.The NC rotary table axially mounting of small dimension adopts mechanical rolling bearing usually, during high low speed load-bearing rigidity and gyrodaming proper.For large heavy turntable, in low-speed highly precise indexing process, need higher sound state supporting rigidity, general employing slip unloaded slideway or hydrostatic slideway, floating amount of static guide track 0.02 ~ 0.04mm; Oil film resistance in high speed turning course is comparatively large, and floating amount of static guide track 0.05 ~ 0.10mm, when rotation of rotary table reaches certain rotating speed, dynamic pressure effect can ensure the axially mounting rigidity of turntable.At present, equip for large heavy type numerical control, common guide rail support mode cannot meet the high low speed calibration function of turntable simultaneously.The floating hydrostatic slideway of constant current constant voltage compound of the present invention and control method thereof are for solving the problem and proposing.
Summary of the invention
The present invention turns round and low-speed highly precise calibration function mainly for the high speed of large heavy type numerical control rotating table, proposes a kind of floating hydrostatic slideway and control method thereof of constant current constant voltage compound, belongs to subjects of mechanical engineering, advanced manufacture and automatic field.
The floating hydrostatic slideway of a kind of constant current constant voltage compound of the present invention and control method thereof, be intended to the high low speed movement needs of satisfied large heavy type numerical control rotating table.Car rolls combined machine, the combined machine of gear and angle head cylindrical grinding requires that NC rotary table can possess low-speed highly precise calibration and high speed revolute function.
The floating hydrostatic slideway of constant current constant voltage compound of the present invention and control method thereof, be intended to set forth the large heavy type numerical control panoramic table axially mounting mode possessing high low speed calibration function, belongs to domestic initiation.Outstanding advantages is: structure of the present invention is simple, control method is reliable, composite bearing is carried out by constant current constant voltage guide rail, achieve the function and service of supporting form in high low speed indexing process, both improve support stiffness during turntable low-speed highly precise calibration, when can ensure that again turntable turns round at a high speed, possess suitable damping; Thus meet the technological requirement of the combined machine such as " gear turning gear hobbing composite processing machine tool " and " large-scale, high-precision numerical control forming gear grinding machines ".
Technical scheme of the present invention is as follows
A kind of floating hydrostatic slideway of constant current constant voltage compound, comprise main guide rail 1, oppositely preload guide rail 2, base 3 and work top 4, described main guide rail 1 and the closed hydrostatic slideway that oppositely preloading guide rail 2 is formed support, main guide rail 1 is constant-current static-pressure guide rail, be made up of dynamic guide rail and quiet guide rail, the main guide rail 1 on work top 4 is the main guide rail 1 on dynamic guide rail, base 3 is quiet guide rail.Oppositely preload the floating hydrostatic slideway that guide rail 2 is constant current constant voltage compound.
Constant voltage static-pressure system 25 controls oppositely to preload size, and constant-current system controls the oil film thickness in the constant voltage chamber 12 oppositely preloaded.
Described main guide rail 1 comprises the dark oil pocket 6 of main guide rail and the shallow oil pocket 7 of main guide rail, the shallow oil pocket 7 of main guide rail is distributed in the both sides of the dark oil pocket 6 of main guide rail, the oil pocket degree of depth of the shallow oil pocket 7 of main guide rail takes 1/2 of the dark oil pocket 6 of rail as the leading factor, and the shallow oil pocket 7 of main guide rail and the dark oil pocket 6 of main guide rail are distributed in main guide rail 1 motion circumferentially.
Be provided with the fuel feed hole 5 of main guide rail in the dark oil pocket 6 of described main guide rail, the side of the shallow oil pocket 7 of main guide rail is provided with the sealing oil edge 8 of main guide rail.
The described guide rail 2 that oppositely preloads is made up of the oil-feed block 13 oppositely preloading the pressing plate 9 of guide rail, the constant-voltage system oil-in 10 oppositely preloaded and constant-current system; Oppositely preloading guide rail 2 is floating structure, and there is no Metal Contact between guarantee guideway, the pressing plate 9 oppositely preloading guide rail is fixed with base 3, rocker piece 11 is matched in clearance with the reverse pressing plate 9 preloading guide rail, end face and the circumference of rocker piece 11 are sealed by the end-face seal ring 17 of rocker piece and the circumferential seal circle 18 of rocker piece respectively, end clearance about 0.20mm, circular gap about 0.10mm; Described rocker piece 11 is furnished with two symmetrical constant current chambeies 15 oppositely preloaded, rocker piece 11 is fixed with oil-feed block 13, and sealed by the sealing ring 16 of the oil-feed block of oil-feed block 13, ensure that the oil-in 14 of oil-feed block of oil-feed block 13 is connected with oil-in 19 No leakage of rocker piece.
Uniform 6 oil pockets on described main guide rail 1, oppositely preload uniform 4 the constant current constant voltage combined recess of guide rail 2,6 oil pockets of main guide rail 1 are by large discharge multi-head pump 20 and small-flow multi-head pump 21 mixing feed, large discharge multi-head pump 20 and small-flow multi-head pump 21 share the front to pump 24 of a multi-head pump, drive the alternating-current variable frequency motor 22 of the driving large discharge multi-head pump of large discharge multi-head pump 20 to be controlled by frequency converter 23.
A control method for the floating hydrostatic slideway of the constant current constant voltage compound as described in claim 1 to 5, comprises the following steps:
As turntable low speed calibration (the n < n0) that supported by the floating hydrostatic slideway of constant current constant voltage compound, main guide rail 1 by small-flow multi-head pump 21 fuel feeding, floatation volume 0.02 ~ 0.04mm;
Oppositely preload guide rail 2 and carry out constant-current constant-voltage system mixing feed by small-flow multi-head pump 21, constant voltage static-pressure system 25, the oil clearance 0.02 ~ 0.04mm between rocker piece 11 and work top 4;
As turntable high speed indexing (n >=n0) that supported by the floating hydrostatic slideway of constant current constant voltage compound, main guide rail 1 and oppositely preload guide rail 2 by small-flow multi-head pump 21 and large discharge multi-head pump 20 mixing feed, floatation volume 0.05 ~ 0.10mm.
When in the turntable height low speed indexing process supported by the floating hydrostatic slideway of constant current constant voltage compound, for different turntable loads, using dark oil pocket 6 pressure of main guide rail 1 as feedback signal, regulate the flow of large discharge multi-head pump 20 by frequency converter 23, to meet the requirement of main guide rail 1 floatation volume.
The floating hydrostatic slideway of constant current constant voltage compound of the present invention and control method thereof, for the axially mounting mode of high low speed rotary table, set forth oil recess structure and control method thereof; Floating static-pressure guide rail structure of the present invention is simple, and control method is convenient, meets the high low speed calibration requirement of turntable.
The hydrostatic slideway that main guide rail 1 forms for deep and shallow oil pocket, oppositely preloading guide rail 2 are floating type static pressure guide rail, and by constant-current constant-voltage system compound fuel feeding, constant voltage oil pocket controls the size oppositely preloaded, and provides floating space, separate with constant flow static pressure system.Rocker piece 11 axial float, meets the requirement of high low speed revolution to support rails; 2 constant flow static pressure oil pockets on rocker piece 11 can ensure that rocker piece 11 floats evenly with the guide rail that oppositely preloads on work top 4, avoid Metal Contact.
The floating hydrostatic slideway of constant current constant voltage compound and a control method thereof, the axially mounting mode mainly for large heavy type numerical control rotating table controls.Turntable shaft of the present invention is made up of to support rails 3 large parts: the main guide rail of constant flow static pressure fuel feeding, the floating guide rail oppositely preloading oil pocket, constant current fuel feeding of constant pressure oil supply.
The handoff algorithms of main guide rail fuel system when the further technical scheme of floating hydrostatic slideway of constant current constant voltage compound of the present invention is described turntable height low speed calibration.During turntable low speed calibration, main guide rail is the constant-current static-pressure guide rail of small-flow multi-head oil pump feed, floatation volume 0.02 ~ 0.04mm; During turntable high speed indexing, main guide rail is the constant-current static-pressure guide rail of small-flow multi-head pump and large discharge multi-head pump mixing feed, floatation volume 0.05 ~ 0.10mm.Main guide rail is the oil pocket of depth structure, meets dynamic and static pressure requirement; Using main guide rail oil pocket pressure as feedback signal, frequency converter regulates the flow of large discharge multi-head pump, meets the floatation volume of main guide rail in turntable different bearer situation.
The handoff algorithms of mode is oppositely preloaded when the further technical scheme of floating hydrostatic slideway of constant current constant voltage compound of the present invention is described turntable height low speed calibration.Oppositely preload the floating hydrostatic slideway that guide rail is constant current constant voltage compound fuel feeding; During turntable low speed calibration, constant-voltage system normal fuel injection, constant current oil pocket by small-flow multi-head oil pump feed, the oil clearance 0.02 ~ 0.04mm between rocker piece and work top; During turntable high speed indexing, constant-voltage system is fuel feeding not, constant current oil pocket by small-flow multi-head pump and large discharge multi-head pump mixing feed, the oil clearance 0.05 ~ 0.10mm between rocker piece and turntable table top; The preloading size oppositely preloading guide rail is determined by the pressure of constant-voltage system, and separate between constant flow static pressure system.
The invention has the beneficial effects as follows
Hydrostatic slideway of the present invention, on the basis ensureing the normal floatation volume of guide rail, work top adds and oppositely preloads, improve the carrying rigidity of guide rail.Main support rails is constant-current type guide rail, and oil pocket adopts depth cavity configuration, and by large discharge multi-head pump and small-flow multi-head pump mixing feed, wherein the alternating-current variable frequency motor of large discharge multi-head pump is by Frequency Converter Control; Oppositely preload the floating hydrostatic slideway that guide rail is constant current constant voltage compound fuel feeding, wherein, constant current oil pocket carries out mixing feed by the multi-head pump of large discharge multi-head pump and low discharge, controls the oil clearance between guide pass; Constant voltage chamber controls oppositely to preload size.Constant current constant voltage oil supply system is separate, ensure that guide rail floatation volume and oppositely guide rail not interference between preloading.During turntable low-speed highly precise calibration, oppositely preload the floatation volume 0.02 ~ 0.04mm of guide rail, when turntable turns round at a high speed, oppositely preload the floatation volume 0.05 ~ 0.10mm of guide rail.
The floating hydrostatic slideway of constant current constant voltage compound of the present invention can meet the high low speed calibration function of turntable, assembly technology and control method simple and reliable.
Compared with prior art, floating hydrostatic slideway of the present invention and control method thereof can meet turntable low-speed highly precise calibration and the pivotal support needs of high speed.High rigidity when the method for constant current constant voltage compound fuel feeding can ensure turntable low-speed highly precise calibration, the pivotal speed of high speed can reach 10 ~ 50 r/min, for " gear turning gear hobbing composite processing machine tool " and " large-scale, high-precision numerical control forming gear grinding machines " provide qualified functional part.Control method of the present invention is simple and reliable, and separated by oil film completely between hydrostatic slideway pair, precision stability is high.
Accompanying drawing explanation
Fig. 1 is axially mounting guide rail structure schematic diagram of the present invention,
Fig. 2 is main guide rail deep and shallow oil recess structure schematic diagram of the present invention,
Fig. 2 A is along A-A direction sectional view in Fig. 2.
Fig. 2 B is along B-B direction sectional view in Fig. 2.
Fig. 3 is oppositely preloading guide rail structure schematic diagram of the present invention,
Fig. 4 is the hydraulic schematic diagram of constant current constant voltage compound fuel feeding of the present invention,
Fig. 5 is the control method of floating hydrostatic slideway of the present invention;
Part description in figure: 1-main guide rail, 2-oppositely preloads guide rail, 3-base, 4-work top, the fuel feed hole of 5-main guide rail, the dark oil pocket of 6-main guide rail, the shallow oil pocket of 7-main guide rail, the sealing oil edge of 8-main guide rail, 9-oppositely preloads the pressing plate of guide rail, the constant-voltage system oil-in that 10-oppositely preloads, 11-rocker piece, the constant voltage chamber that 12-oppositely preloads, the oil-feed block of 13-constant-current system, the oil-in of 14-oil-feed block, the constant current chamber that 15-oppositely preloads, the sealing ring of 16-oil-feed block, the end-face seal ring of 17-rocker piece, the circumferential seal circle of 18-rocker piece, the oil-in of 19-rocker piece, 20-large discharge multi-head pump, 21-small-flow multi-head pump, 22-drives the alternating-current variable frequency motor of large discharge multi-head pump, 23-frequency converter, the front of 24-multi-head pump gives pump, 25-constant voltage static-pressure system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technology of the present invention content is explained:
As Fig. 1, turntable shaft supports to relying on main guide rail 1, the oppositely closed hydrostatic slideway of preloading guide rail 2 formation.Main guide rail 1 is constant-current static-pressure guide rail, is made up of dynamic guide rail and quiet guide rail, and the main guide rail on work top 4 is that main guide rail on guide rail, base 3 is quiet guide rail.Oppositely preload the floating hydrostatic slideway that guide rail 2 is constant current constant voltage compound, constant-voltage system controls oppositely to preload size, and constant-current system controls oil film thickness.
As Fig. 2, Fig. 2 A, Fig. 2 B, the quiet guide rail of main guide rail is depth oil recess structure, shallow oil pocket 7 is distributed in the both sides of dark oil pocket 6, the oil pocket degree of depth of shallow oil pocket 7 is 1/2 of dark oil pocket 6, and shallow oil pocket 7 and dark oil pocket 6 are distributed in main guide rail motion circumferentially, oil pocket oil-in 5, oil pocket sealing oil edge 8, meets the dynamic and static pressure requirement of main guide rail in turntable height low speed running.
As Fig. 3, oppositely preload guide rail 2 and be made up of the oil-feed block 13 of pressing plate 9, rocker piece 11 and constant-current system; Oppositely preloading guide rail 2 is floating structure, oppositely preloads and can improve axial carrying rigidity in turntable low-speed highly precise indexing process, and ensures do not have Metal Contact between guideway.Pressing plate 9 is fixed with base 3, and rocker piece 11 and pressing plate 9 are matched in clearance, and the end face of rocker piece 11 and circumference are sealed by sealing ring 17 and sealing ring 18 respectively, end clearance about 0.20mm, circular gap about 0.10mm, to meet the float function of rocker piece.The implication that rocker piece 11 floats has 2 points: the first, and the change of main guide rail 1 floatation volume that turntable carrying and high low cruise cause can not affect the oil film thickness oppositely preloading guide rail 2; The second, rocker piece 11 is furnished with two symmetrical constant current oil pockets 15, when oppositely preloading guide rail and there is parallelism error with main guide rail, ensures oppositely to preload the floatation volume of guide rail 2 evenly, and avoid the Metal Contact of guide rail.Rocker piece 11 is fixed with oil-feed block 13, and is sealed by the sealing ring 16 of oil-feed block, ensures that the oil-in 14 of oil-feed block is connected with oil-in 19 No leakage of rocker piece.
Fig. 4 is the hydraulic schematic diagram of constant current constant voltage compound fuel feeding of the present invention: uniform 6 oil pockets on main guide rail, oppositely preloads uniform 4 the constant current constant voltage combined recess of guide rail.6 oil pockets of main guide rail 1, by large discharge multi-head pump 20 and small-flow multi-head pump 21 mixing feed, oppositely preload 4 combined recess of guide rail 2 by large discharge multi-head pump 20, small-flow multi-head pump 21 and constant voltage static-pressure system 25 mixing feed.Wherein, to pump 24 before large discharge multi-head pump 20 and small-flow multi-head pump 21 share one, the alternating-current variable frequency motor 22 of large discharge multi-head pump 20 is driven to be controlled by frequency converter 23, when turntable carrying change, fed back by the pressure of dark oil pocket 6, control the floatation volume of main guide rail 1.
Fig. 5 is the control method of floating hydrostatic slideway of the present invention: time turntable low speed calibration (n < n0), main guide rail 1 by small-flow multi-head pump 21 fuel feeding, floatation volume 0.02 ~ 0.04mm; Oppositely preload guide rail 2 and carry out constant-current constant-voltage system mixing feed by small-flow multi-head pump 21, constant voltage static-pressure system 25, the oil clearance 0.02 ~ 0.04mm between rocker piece 11 and work top 4.Time turntable high speed indexing (n >=n0), main guide rail 1 and oppositely preload guide rail 2 by small-flow multi-head pump 21 and large discharge multi-head pump 20 mixing feed, floatation volume 0.05 ~ 0.10mm.
Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; the various modification that in this area, common engineers and technicians make technical scheme of the present invention and improvement; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention is all recorded in detail in the claims.
Claims (4)
1. the floating hydrostatic slideway of a constant current constant voltage compound, it is characterized in that comprising main guide rail (1), oppositely preloading guide rail (2), base (3) and work top (4), described main guide rail (1) and the closed hydrostatic slideway that oppositely preloading guide rail (2) is formed support, main guide rail (1) is constant-current static-pressure guide rail, be made up of dynamic guide rail and quiet guide rail, main guide rail (1) on work top (4) is the main guide rail (1) on dynamic guide rail, base (3) is quiet guide rail, oppositely preloads the floating hydrostatic slideway that guide rail (2) is constant current constant voltage compound; Described main guide rail (1) comprises the dark oil pocket (6) of main guide rail and the shallow oil pocket (7) of main guide rail, the shallow oil pocket (7) of main guide rail is distributed in the both sides of the dark oil pocket (6) of main guide rail, the oil pocket degree of depth of the shallow oil pocket (7) of main guide rail takes 1/2 of the dark oil pocket (6) of rail as the leading factor, and the shallow oil pocket (7) of main guide rail and the dark oil pocket (6) of main guide rail are distributed in main guide rail (1) moves circumferentially; Be provided with the fuel feed hole (5) of main guide rail in the dark oil pocket (6) of described main guide rail, the side of the shallow oil pocket (7) of main guide rail is provided with the sealing oil edge (8) of main guide rail; The described guide rail (2) that oppositely preloads is made up of the oil-feed block (13) oppositely preloading the pressing plate (9) of guide rail, the constant-voltage system oil-in (10) oppositely preloaded and constant-current system; Oppositely preloading guide rail (2) is floating structure, and there is no Metal Contact between guarantee guideway, the pressing plate (9) oppositely preloading guide rail is fixed with base (3), rocker piece (11) is matched in clearance with the reverse pressing plate (9) preloading guide rail, end face and the circumference of rocker piece (11) are sealed by the end-face seal ring (17) of rocker piece and the circumferential seal circle (18) of rocker piece respectively, end clearance 0.20mm, circular gap 0.10mm; Described rocker piece (11) is furnished with two symmetrical constant current chambeies (15) oppositely preloaded, rocker piece (11) is fixed with oil-feed block (13), and sealed by the sealing ring (16) of the oil-feed block of oil-feed block (13), ensure that the oil-in (14) of oil-feed block of oil-feed block (13) is connected with oil-in (19) No leakage of rocker piece.
2. the floating hydrostatic slideway of constant current constant voltage compound according to claim 1, it is characterized in that upper uniform 6 oil pockets of described main guide rail (1), oppositely preload uniform 4 the constant current constant voltage combined recess of guide rail (2), 6 oil pockets of main guide rail (1) are by large discharge multi-head pump (20) and small-flow multi-head pump (21) mixing feed, large discharge multi-head pump (20) and small-flow multi-head pump (21) share the front to pump (24) of a multi-head pump, drive the alternating-current variable frequency motor (22) of large discharge multi-head pump (20) to be controlled by frequency converter (23).
3. a control method for the floating hydrostatic slideway of constant current constant voltage compound as claimed in claim 1 or 2, is characterized in that comprising the following steps:
When the turntable low speed calibration supported by the floating hydrostatic slideway of constant current constant voltage compound, main guide rail (1) by small-flow multi-head pump (21) fuel feeding, floatation volume 0.02 ~ 0.04mm; Oppositely preload guide rail (2) and carry out constant-current constant-voltage system mixing feed by small-flow multi-head pump (21), constant voltage static-pressure system (25), the oil clearance 0.02 ~ 0.04mm between rocker piece (11) and work top (4); When the turntable high speed indexing supported by the floating hydrostatic slideway of constant current constant voltage compound, main guide rail (1) and oppositely preloading guide rail (2) by small-flow multi-head pump (21) and large discharge multi-head pump (20) mixing feed, floatation volume 0.05 ~ 0.10mm.
4. method according to claim 3, it is characterized in that in the described turntable height low speed indexing process when being supported by the floating hydrostatic slideway of constant current constant voltage compound, for different turntable loads, using dark oil pocket (6) pressure of main guide rail (1) as feedback signal, the flow of large discharge multi-head pump (20) is regulated, to meet main guide rail (1) floatation volume requirement by frequency converter (23).
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| CN201210509407.8A CN103028954B (en) | 2012-12-04 | 2012-12-04 | A kind of floating hydrostatic slideway of constant current constant voltage compound and control method thereof |
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| CN201210509407.8A CN103028954B (en) | 2012-12-04 | 2012-12-04 | A kind of floating hydrostatic slideway of constant current constant voltage compound and control method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458744A (en) * | 2015-12-13 | 2016-04-06 | 北京工业大学 | Quantitative and constant-pressure type hydrostatic pressure rotary table experimental device |
| CN108274252A (en) * | 2018-04-16 | 2018-07-13 | 安徽普瑟斯智能科技股份有限公司 | A kind of static pressure floating rotary table of heavy machine tool |
| CN112077616B (en) * | 2020-09-10 | 2021-08-10 | 中国工程物理研究院机械制造工艺研究所 | Hydrostatic pressure guide rail system with actively controllable oil film thickness |
| CN114523416B (en) * | 2022-03-14 | 2023-05-09 | 浙江杰克智能装备有限公司 | Dynamic pressure main shaft assembly |
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| US3384425A (en) * | 1964-12-07 | 1968-05-21 | Churchill Charles Ltd | Hydrostatic bearing |
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| CN102189410A (en) * | 2011-03-23 | 2011-09-21 | 西安交通大学 | T-shaped hydrostatic guide rail for precision finishing machine tool |
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| JP3288401B2 (en) * | 1991-07-17 | 2002-06-04 | 東芝機械株式会社 | Static pressure table device |
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| US3384425A (en) * | 1964-12-07 | 1968-05-21 | Churchill Charles Ltd | Hydrostatic bearing |
| CN200939560Y (en) * | 2006-08-28 | 2007-08-29 | 上海机床厂有限公司 | Closed static pressure guideway structure |
| CN200991824Y (en) * | 2006-12-18 | 2007-12-19 | 天水星火机床有限责任公司 | Eclosed liquid static-pressure guide-rail |
| CN101829904A (en) * | 2010-01-26 | 2010-09-15 | 西安交通大学 | Closed hydrostatic slideway |
| CN102059558A (en) * | 2010-11-24 | 2011-05-18 | 南京工大数控科技有限公司 | Large and heavy numerical control static-pressure revolving platform |
| CN102189410A (en) * | 2011-03-23 | 2011-09-21 | 西安交通大学 | T-shaped hydrostatic guide rail for precision finishing machine tool |
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