CN103949894A - Device and system for controlling oil film thickness of lathe open hydrostatic guideway - Google Patents
Device and system for controlling oil film thickness of lathe open hydrostatic guideway Download PDFInfo
- Publication number
- CN103949894A CN103949894A CN201410196676.2A CN201410196676A CN103949894A CN 103949894 A CN103949894 A CN 103949894A CN 201410196676 A CN201410196676 A CN 201410196676A CN 103949894 A CN103949894 A CN 103949894A
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- China
- Prior art keywords
- film thickness
- oil film
- converter
- guide rail
- oil
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
- B23Q1/017—Arrangements of ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a device and a system for controlling the oil film thickness of a lathe open hydrostatic guideway. In a closed-loop control device for the oil film thickness of the lathe hydrostatic guideway, the control quantity is an ideal oil film thickness, the controlled quantity is an actual oil film thickness, the input ideal oil film thickness is compared with the actual oil film thickness detected by a position sensor, a differential signal is calculated by a control algorithm, an analog signal is then obtained through signal conversion and power amplification, a frequency converter is controlled by the signal, and a motor of a variable pump is controlled by the frequency converter, so that oil flow output by the variable pump varies with the variation of the oil film thickness, and the pressure of fluid between the movable and support guideways is changed so as to stabilize the oil film thickness of the guideway.
Description
Technical field
The present invention relates to a kind of lathe open hydrostatic sliding way field, particularly a kind of control method of the lathe open hydrostatic sliding way based on converter technique modified oil film thickness controlling system.
Background technology
Hydrostatic slideway has that coefficient of friction is little, mechanical efficiency is high, oil film between guide pass is very thin, have good lubricity and absorbing, guide rail use without wearing and tearing for a long time, working motion is steady, the life-span is high, the variation of movement velocity is on advantages such as the impact of oil film thickness and rigidity are little, therefore hydrostatic slideway can meet the requirement of high accuracy, heavy load and various velocity interval lathes, in various lathes (especially Digit Control Machine Tool and ultra-precision machine tool), is widely used.Oil film rigidity and bearing capacity are two topmost performance indications of hydrostatic slideway, main relevant with the oil film thickness of guide rail.In constant flow rate oil supply system, in the time that the load of hydrostatic slideway changes, the oil film thickness of guide rail also will change thereupon, make the oil film thickness can not be all the time in optimum state; This will reduce the performance of the aspects such as hydrostatic slideway oil film rigidity and bearing capacity.Therefore, adopt rational control mode to make hydrostatic slideway there is the ability that regulates oil film thickness, and make oil film thickness keep optimal value will greatly promote the service behaviour of hydrostatic slideway.Oil film thickness of hydrostatic guide way control mainly changes by adjusting the rotating speed of motor that oil pump feed amount realizes.At present, electric machine speed regulation mainly adopts DC speed regulation technology; Although this control system based on DC speed regulation technology can reach the requirement of speed governing, the shortcomings such as also exist that energy consumption is large, governing system is difficult in maintenance and equipment is huge.Along with the fast development of electronic technology, variable-frequency control technique is grown up gradually, the particularly maturation of vector converter control technology, not only aspect speed governing, can compare favourably with DC speed regulation, be more suitable for the incomparable occasion of Direct Current Governor System, as high speed and jumbo rotating machinery, also solve the problem of Direct Current Governor System energy waste, occupation area of equipment is dwindled, easy to maintenance, if combine and also can make control more flexible with control algolithm.
Summary of the invention
Main purpose of the present invention be to provide a kind of can the Real-Time Monitoring lathe course of work in the lathe open hydrostatic sliding way oil film thickness Apparatus and system of the actual oil film thickness size of hydrostatic slideway.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of lathe open hydrostatic sliding way oil film thickness device, comprise frequency converter, variable pump, first throttle valve, oil-in, moving guide rail, fuel tank, filter, the second choke valve, overflow valve and computer, described computer one end connects converter, this converter connects frequency converter, variable pump, the second choke valve and oil-in successively, oil-in is arranged on moving guide rail, described variable pump connects respectively overflow valve and filter, described filter below arranges fuel tank, between fuel tank and moving guide rail, first throttle valve is set.
A kind of control system of lathe open hydrostatic sliding way oil film thickness device, the control system of closed-loop control device is made up of controller link and each function link, described controller link is made up of subtracter, calculator, A/D converter and D/A converter, described A/D converter connects displacement transducer and the subtracter of closed-loop control system, and described D/A converter connects calculator and the frequency converter of closed-loop control system; Described each function link comprises the frequency converter, asynchronous motor, variable pump, the guide rail that connect successively, after asynchronous motor, be provided with speed feedback ring, be connected with velocity sensor, converter and subtracter in turn, guide rail is provided with pressure sensor, be connected to calculator, after guide rail, be provided with oil film thickness feedback loop, be connected with displacement transducer, A/D converter and subtracter in turn.
As preferably, described closed-loop control system has merged the feature of quantitative oil feeding type hydrostatic slideway and level pressure oil feeding type hydrostatic slideway, has realized the compensation of pressure and flow.
Beneficial effect:
The present invention compared with prior art, it has following beneficial effect: the closed-loop control device of machine tool fluid pressure controlling thickness of guide rail oil membrane of the present invention can the Real-Time Monitoring lathe course of work in the size of the actual oil film thickness of hydrostatic slideway, and adjust fast, thereby make oil film thickness constant within the scope of optimal value, ensured machining accuracy and the range of work of lathe.
Brief description of the drawings
For ease of explanation, the present invention is described in detail by following specific embodiment and accompanying drawing.
Fig. 1 is patent machine tool static-pressure controlling thickness of guide rail oil membrane control system schematic diagram of the present invention;
Fig. 2 is patent machine tool static-pressure controlling thickness of guide rail oil membrane control system control block diagram of the present invention;
In Fig. 1,1-frequency converter, 2-variable pump, 3-choke valve, 4-oil-in, 5-moves guide rail,
6-fuel tank, 7-filter, 8-choke valve, 9-overflow valve.
Detailed description of the invention
Refer to shown in Fig. 1 and Fig. 2, a kind of lathe open hydrostatic sliding way oil film thickness device, comprise frequency converter 1, variable pump 2, first throttle valve 3, oil-in 4, moving guide rail 5, fuel tank 6, filter 7, the second choke valve 8, overflow valve 9 and computer, described computer one end connects converter, this converter connects frequency converter 1 successively, variable pump 2, the second choke valve 8 and oil-in 4, oil-in 4 is arranged on moving guide rail 5, described variable pump 2 connects respectively overflow valve 9 and filter 7, described filter 7 belows arrange fuel tank 6, between fuel tank 6 and moving guide rail 5, first throttle valve 3 is set.
A kind of control system of lathe open hydrostatic sliding way oil film thickness device, the control system of closed-loop control device is made up of controller link and each function link, described controller link is made up of subtracter, calculator, A/D converter and D/A converter, described A/D converter connects displacement transducer and the subtracter of closed-loop control system, and described D/A converter connects calculator and the frequency converter of closed-loop control system; Described each function link comprises the frequency converter, asynchronous motor, variable pump, the guide rail that connect successively, after asynchronous motor, be provided with speed feedback ring, be connected with velocity sensor, converter and subtracter in turn, guide rail is provided with pressure sensor, be connected to calculator, after guide rail, be provided with oil film thickness feedback loop, be connected with displacement transducer, A/D converter and subtracter in turn.
The closed-loop control device course of work of machine tool fluid pressure controlling thickness of guide rail oil membrane of the present invention is as follows: first use displacement transducer to record work middle guide oil film thickness, and obtain actual oil film thickness signal h through A/D converter
cl, then with desirable oil film thickness signal h
optafter subtracter calculates, obtain difference signal Δ h, Δ h, as the input signal of closed-loop control system, then calculates the output signal Δ of corresponding controller link through calculator
isT, the feedback signal i of this control signal and velocity sensor
sTcarry out difference calculating through subtracter, produce the control signal i of frequency converter
sT, then process frequency converter generates the control signal T of asynchronous motor
e, asynchronous motor carries out corresponding rotational speed regulation, and generation rotating speed is n
p, variable pump carries out Flow-rate adjustment, generates flow Q
p.
The rotation speed n of asynchronous motor simultaneously
pnegotiation speed sensor and corresponding computing module are by i
sTfeed back to the input of frequency converter, with the control signal Δ of controller link generation
isTcarry out difference computing, generate new inverter control signal i
sT', so as to carrying out the closed-loop control of rotating speed.
Variable pump is with flow Q
pfor guide rail fuel feeding, load W generates oil pocket pressure P, when flow is Q
p, when oil pocket pressure is P, the corresponding oil film thickness of guide rail is h
cl, this value feeds back to the input of controller link by displacement transducer, so as to realizing closed-loop control.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (3)
1. a lathe open hydrostatic sliding way oil film thickness device, comprise frequency converter, variable pump, first throttle valve, oil-in, moving guide rail, fuel tank, filter, the second choke valve, overflow valve and computer, it is characterized in that: described computer one end connects converter, this converter connects frequency converter, variable pump, the second choke valve and oil-in successively, oil-in is arranged on moving guide rail, described variable pump connects respectively overflow valve and filter, described filter below arranges fuel tank, between fuel tank and moving guide rail, first throttle valve is set.
2. the control system of a lathe open hydrostatic sliding way oil film thickness device, the control system of closed-loop control device is made up of controller link and each function link, it is characterized in that: described controller link is made up of subtracter, calculator, A/D converter and D/A converter, described A/D converter connects displacement transducer and the subtracter of closed-loop control system, and described D/A converter connects calculator and the frequency converter of closed-loop control system; Described each function link comprises the frequency converter, asynchronous motor, variable pump, the guide rail that connect successively, after asynchronous motor, be provided with speed feedback ring, be connected with velocity sensor, converter and subtracter in turn, guide rail is provided with pressure sensor, be connected to calculator, after guide rail, be provided with oil film thickness feedback loop, be connected with displacement transducer, A/D converter and subtracter in turn.
3. the control system of lathe open hydrostatic sliding way oil film thickness device according to claim 2, it is characterized in that: described closed-loop control system has merged the feature of quantitative oil feeding type hydrostatic slideway and level pressure oil feeding type hydrostatic slideway, has realized the compensation of pressure and flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196676.2A CN103949894A (en) | 2014-05-12 | 2014-05-12 | Device and system for controlling oil film thickness of lathe open hydrostatic guideway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196676.2A CN103949894A (en) | 2014-05-12 | 2014-05-12 | Device and system for controlling oil film thickness of lathe open hydrostatic guideway |
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| Publication Number | Publication Date |
|---|---|
| CN103949894A true CN103949894A (en) | 2014-07-30 |
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|---|---|---|---|
| CN201410196676.2A Pending CN103949894A (en) | 2014-05-12 | 2014-05-12 | Device and system for controlling oil film thickness of lathe open hydrostatic guideway |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551861A (en) * | 2014-12-25 | 2015-04-29 | 重庆机床(集团)有限责任公司 | Working condition monitoring device of hydrostatic guideway |
| CN104772653A (en) * | 2015-04-28 | 2015-07-15 | 安徽工程大学 | Liquid static pressure guide rail oil film thickness control system and method based on oil temperature compensation |
| CN105091826A (en) * | 2015-09-14 | 2015-11-25 | 安徽工程大学 | Machine tool hydrostatic pressure guide rail oil film thickness detection test stand |
| CN105117598A (en) * | 2015-08-24 | 2015-12-02 | 中南大学 | Forecast control method, device and system of precise liquid hydrostatic guideway |
| CN105710661A (en) * | 2016-04-22 | 2016-06-29 | 湖北工业大学 | Oil film thickness adjusting device and method for static pressure workbench |
| CN105864612A (en) * | 2016-06-24 | 2016-08-17 | 滁州欧博特电子制造有限公司 | Production equipment guide rail with lubricant injecting hole |
| TWI635925B (en) * | 2017-11-16 | 2018-09-21 | 國立勤益科技大學 | Oil film detecting device of processing machine feed system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240652A (en) * | 1999-02-23 | 2000-09-05 | Nagase Integrex Co Ltd | Hydrostatic bearing structure |
| JP2006046589A (en) * | 2004-08-06 | 2006-02-16 | Mitaka Koki Co Ltd | Slide table device |
| CN201455668U (en) * | 2009-07-08 | 2010-05-12 | 路文忠 | Liquid discontinuous flowing precise circular turntable static pressure guide rail by using sealing piece |
| CN202240457U (en) * | 2011-07-13 | 2012-05-30 | 福建成功机床有限公司 | Guide rail with novel unloading device |
| CN203343805U (en) * | 2013-07-04 | 2013-12-18 | 哈尔滨理工大学 | Hydrostatic bearing oil film thickness control system |
-
2014
- 2014-05-12 CN CN201410196676.2A patent/CN103949894A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240652A (en) * | 1999-02-23 | 2000-09-05 | Nagase Integrex Co Ltd | Hydrostatic bearing structure |
| JP2006046589A (en) * | 2004-08-06 | 2006-02-16 | Mitaka Koki Co Ltd | Slide table device |
| CN201455668U (en) * | 2009-07-08 | 2010-05-12 | 路文忠 | Liquid discontinuous flowing precise circular turntable static pressure guide rail by using sealing piece |
| CN202240457U (en) * | 2011-07-13 | 2012-05-30 | 福建成功机床有限公司 | Guide rail with novel unloading device |
| CN203343805U (en) * | 2013-07-04 | 2013-12-18 | 哈尔滨理工大学 | Hydrostatic bearing oil film thickness control system |
Non-Patent Citations (1)
| Title |
|---|
| 何涛 等: "重型立车工作台导轨油膜厚度控制方案研究", 《制造技术与机床》, no. 12, 31 December 2013 (2013-12-31) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551861A (en) * | 2014-12-25 | 2015-04-29 | 重庆机床(集团)有限责任公司 | Working condition monitoring device of hydrostatic guideway |
| CN104772653A (en) * | 2015-04-28 | 2015-07-15 | 安徽工程大学 | Liquid static pressure guide rail oil film thickness control system and method based on oil temperature compensation |
| CN105117598A (en) * | 2015-08-24 | 2015-12-02 | 中南大学 | Forecast control method, device and system of precise liquid hydrostatic guideway |
| CN105117598B (en) * | 2015-08-24 | 2018-02-09 | 中南大学 | Forecast control method, the apparatus and system of liquid precision hydrostatic slideway |
| CN105091826A (en) * | 2015-09-14 | 2015-11-25 | 安徽工程大学 | Machine tool hydrostatic pressure guide rail oil film thickness detection test stand |
| CN105091826B (en) * | 2015-09-14 | 2017-08-25 | 安徽工程大学 | A kind of machine tool fluid pressure controlling thickness of guide rail oil membrane Detecting data |
| CN105710661A (en) * | 2016-04-22 | 2016-06-29 | 湖北工业大学 | Oil film thickness adjusting device and method for static pressure workbench |
| CN105710661B (en) * | 2016-04-22 | 2018-06-29 | 湖北工业大学 | A kind of static pressure workbench oil film thickness adjusting method |
| CN105864612A (en) * | 2016-06-24 | 2016-08-17 | 滁州欧博特电子制造有限公司 | Production equipment guide rail with lubricant injecting hole |
| CN105864612B (en) * | 2016-06-24 | 2018-11-16 | 滁州欧博特电子制造有限公司 | A kind of production equipment guide rail with lubricating oil injection orifice |
| TWI635925B (en) * | 2017-11-16 | 2018-09-21 | 國立勤益科技大學 | Oil film detecting device of processing machine feed system |
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Application publication date: 20140730 |