CN101249569A - Air-float chief axis capable of self-determination measuring chief axis applied force and measurement method thereof - Google Patents
Air-float chief axis capable of self-determination measuring chief axis applied force and measurement method thereof Download PDFInfo
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- CN101249569A CN101249569A CNA2008100204696A CN200810020469A CN101249569A CN 101249569 A CN101249569 A CN 101249569A CN A2008100204696 A CNA2008100204696 A CN A2008100204696A CN 200810020469 A CN200810020469 A CN 200810020469A CN 101249569 A CN101249569 A CN 101249569A
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- main shaft
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- floating
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Abstract
The invention relates to an air-floating spindle capable of automatically measuring action force on the spindle and a measurement method. The spindle is used as a floating body, the air outputted from a spindle air-floating system through a throttle element as the spindle full-floating support body, and a pressure bearing cavity is formed between the outlet of the throttle element and the spindle bearing surface. The air-floating spindle is characterized in that an air pressure or air flow rate measuring mechanism is arranged; the air pressure measurement is achieved by using the air pressure of the pressure bearing cavity or the back pressure of the throttle element as the detection signal; and the air flow rate measurement is achieved by using the air flow speed or the flow rate of the pressure bearing cavity or the throttle element as the detection signal. The air-floating spindle can realtimely measure the change of cutting force in the precise cutting process, thus monitoring the operation condition of cutting tools and improving the processing accuracy.
Description
Technical field
The present invention relates to the stressed measuring method of main axle structure and main shaft, the stressed measuring method of a kind of air-floating main shaft and air-floating main shaft of more specifically saying so.
Background technology
The axis system of doing supporting with gas bearing is called air-floating main shaft, is widely used in fields such as accurate manufacturing.In precision cutting processing, often need the wearing and tearing and the damaged situation of cutter are monitored, the method that is adopted is to judge the wearing and tearing and the breakage of cutter by the situation of change of measuring cutting force mostly.But existing air-floating main shaft can only be used for bearing load, and can not independently measure the size of suffered load on the main shaft or the displacement of main shaft, therefore, present mode is that a cover measurement mechanism is set in addition, be used for the variation of cutting force is monitored, this mode has obviously increased the complexity of system.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, provide a kind of and can independently measure the stressed air-floating main shaft of main shaft, increasing the autonomous measurement function of air-floating main shaft.
The present invention provides a kind of simple and effective autonomous measurement air-floating main shaft stressed method simultaneously.
Technical solution problem of the present invention adopts following technical scheme:
The present invention can independently measure the stressed air-floating main shaft of main shaft, be to be buoyancy body with the main shaft, with the air-flow by restricting element output in the main shaft air-flotation system is the full over draft support body of main shaft, between the outlet of restricting element and main shaft supporting face, form pressure pocket, design feature is that gas pressure or gas flow measurement mechanism are set, and described gas pressure measurement mechanism is to be detection signal with the gas pressure of pressure pocket or the back pressure of restricting element; Gas flow measurement mechanism is to be detection signal with air current flow speed or flow in pressure pocket or the restricting element.
The design feature of air-floating main shaft of the present invention also is at an end of main shaft the main shaft axle collar to be set, and the main shaft air-flotation system is included on the periphery of main shaft radially air supporting load bearing unit is set, and axial air supporting load bearing unit is set in the both sides of the main shaft axle collar.
The characteristics that the present invention independently measures the stressed method of air-floating main shaft are gas pressure or each flow parameters of gas flow of measuring in the main shaft air-flotation system, each flow parameter of gas pressure or gas flow is corresponding one by one with the tested external force and the displacement of the main shaft under described external force effect on acting on main shaft, and the method that its corresponding relation is demarcated is by experiment determined.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Air-floating main shaft of the present invention has very application prospects to the autonomous measurement of load.Comprise: can monitor in real time the working order of gas bearing self, in time find fault and hidden danger; At the precision cutting manufacture field, measure the variation of cutting force in real time, the cutter operating mode is monitored, provide safeguard for improving machining accuracy.
Description of drawings
Fig. 1 is a measuring principle schematic diagram of the present invention.
Fig. 2 is an air-floating main shaft measuring principle schematic diagram of the present invention.
Fig. 3 is applied in structural representation in the lathe for air-floating main shaft of the present invention.
Fig. 4 force analysis schematic diagram of the present invention.
Number in the figure: 1 pressure pocket, 2 buoyancy body, 3 restricting elements, 4 back pressure cavity, 5 gas channels, 6 main shafts, 7 are air supporting load bearing unit, 8 axial air supporting load bearing units, 9 belt pulleys, 10 main spindle boxes, 11 anchor clamps, 12 workpiece, 13 lathe tools, the 14 main shaft axle collars radially.
Below by the specific embodiment, the invention will be further described in conjunction with the accompanying drawings.
The specific embodiment
Referring to Fig. 1, with the main shaft is buoyancy body 2, with the air-flow by restricting element 3 outputs in the main shaft air-flotation system is the full over draft support body of main shaft, between the bearing-surface of the outlet of restricting element 3 and main shaft 2, form pressure pocket 1, gas pressure or gas flow measurement mechanism are set, detect the gas pressure of pressure pocket 1 or detect the pressure of the back pressure cavity 4 of restricting element 3 with gas pressure measurement mechanism; Gas flow measurement mechanism is used for detecting the flowing velocity or the flow of pressure pocket 1 or restricting element 3 air-flows.
When the external force on acting on buoyancy body 2 changes, can cause the variation of stream pressure, flow and flow velocity in the gas channel 5.Therefore, by measuring gas pressure, flow or the flow velocity of privileged site in the gas circuit, act on the external force size on the buoyancy body 2 as can be known.In concrete the enforcement, the suffered external force on the buoyancy body 2 is definite with the method that the relation between tested each air-flow parameter can be demarcated by experiment.
Referring to Fig. 2, in concrete the enforcement, main shaft 6 has radially air supporting load bearing unit 7 and axially air supporting load bearing unit 8 respectively, and each air supporting load bearing unit is the state that floats fully with main shaft 6 supportings.
Referring to Fig. 3, the air-floating main shaft 6 that is applied in the lathe is arranged in the main spindle box 10, the end that main shaft stretches out main spindle box is equipped with belt pulley 9, other end sectional fixture 11, as gas suspension mechanism, at the bearing-surface of air-floating main shaft 6 radially air supporting load bearing unit 7 and axially air supporting load bearing unit 8 are set respectively, workpiece 12 is installed in the anchor clamps 11, forms cutting to workpiece 12 by lathe tool 13.
Among Fig. 3, one group radially air supporting load bearing unit 7 be arranged in I cross section and II cross section, two groups of axial air supporting load bearing units 8 are arranged symmetrically in the both sides of the main shaft axle collar 14.Force calculation method is as follows:
Fig. 4 is the stressed sketch of main shaft, intersection point with I cross section and main-shaft axis is that initial point is set up space coordinates, radial load on I cross section and the II cross section can be measured by the radially air supporting load bearing unit on the cross section separately, establishes its component on XOZ plane and YOZ plane and is respectively F
1X, F
1Y, F
2X, F
2Y, the unknown component of radial load on XOZ plane and YOZ plane that lathe tool acts on the workpiece is respectively F
3X, F
3Y, the distance L between I cross section and the II cross section
1Determined by bearing arrangement, be known quantity, establishing lathe tool radial load and main-shaft axis intersection point is L to the distance in II cross section
2, L
2Be unknown quantity, then available following formula calculating lathe tool acts on the radial load F on the workpiece
3X, F
3YPosition L with active force
2
F
3X＝F
2X-F
1X
F
3Y＝F
2Y-F
1Y
L
2(F
2X-F
1X)＝L
1F
1X
The axial force that make a concerted effort and the lathe tool of the buoyancy that each axial air supporting load bearing unit 8 produces produce is a pair of equilibrant force, so the opposite sign but equal magnitude of making a concerted effort of the buoyancy that the axial force that lathe tool produces and each axial air supporting load bearing unit 8 produce.
According to the size and the situation of change of power, can monitor in real time the working order of gas bearing self, in time find fault and hidden danger, the cutter operating mode is monitored.For example, the power of measuring on the bearing during dry run is excessive or fluctuation is bigger, may be that bearing is out of order; Add insisting on of measuring on the bearing in man-hour continuous excessive may be tool wear, the power of measuring on bearing fluctuation suddenly is bigger, may be tool failure.After monitoring problem, should handle immediately.
Claims (3)
1, a kind ofly can independently measure the stressed air-floating main shaft of main shaft, with main shaft (6) is buoyancy body (2), with the air-flow by restricting element (3) output in the main shaft air-flotation system is the full over draft support body of main shaft, between the outlet of restricting element (3) and main shaft supporting face, form pressure pocket (1), it is characterized in that being provided with gas pressure or gas flow measurement mechanism, described gas pressure measurement mechanism is to be detection signal with the gas pressure of pressure pocket (1) or the back pressure of restricting element (3); Described gas flow measurement mechanism is to be detection signal with air current flow speed or flow in pressure pocket (1) or the restricting element (3).
2, according to claim 1ly can independently measure the stressed air-floating main shaft of main shaft, it is characterized in that the main shaft axle collar (14) being set at an end of described main shaft (6), described main shaft air-flotation system is included on the periphery of main shaft (6) radially air supporting load bearing unit (7) is set, and in the both sides of the main shaft axle collar (14) axial air supporting load bearing unit (8) is set.
3, independently measure the stressed method of air-floating main shaft, it is characterized in that measuring gas pressure or each flow parameter of gas flow in the main shaft air-flotation system, each flow parameter of described gas pressure or gas flow is corresponding one by one with the tested external force and the displacement of the main shaft under described external force effect on acting on main shaft, and the method that its corresponding relation is demarcated is by experiment determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100204696A CN101249569B (en) | 2008-03-07 | 2008-03-07 | Air-float chief axis capable of independently measuring chief axis applied force and measurement method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100204696A CN101249569B (en) | 2008-03-07 | 2008-03-07 | Air-float chief axis capable of independently measuring chief axis applied force and measurement method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101249569A true CN101249569A (en) | 2008-08-27 |
| CN101249569B CN101249569B (en) | 2011-03-16 |
Family
ID=39953261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100204696A Expired - Fee Related CN101249569B (en) | 2008-03-07 | 2008-03-07 | Air-float chief axis capable of independently measuring chief axis applied force and measurement method thereof |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636295A (en) * | 2012-04-25 | 2012-08-15 | 合肥工业大学 | Anti-coupling air-flotation force measuring unit |
| CN103398813A (en) * | 2013-07-25 | 2013-11-20 | 合肥工业大学 | Porous nozzle floating plate mechanism used for measuring force |
| CN106644182A (en) * | 2016-11-11 | 2017-05-10 | 合肥工业大学 | Float dynamometric device provided with negative pressure groove |
| CN111941146A (en) * | 2019-05-15 | 2020-11-17 | 点八有限责任公司 | Method for driving a virtual sensor, virtual sensor and machine tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5661245A (en) * | 1995-07-14 | 1997-08-26 | Sensym, Incorporated | Force sensor assembly with integrated rigid, movable interface for transferring force to a responsive medium |
| CN2403001Y (en) * | 1999-11-09 | 2000-10-25 | 西安市斯坦微电子研究所 | Float pressure flowmeter |
| CN201264102Y (en) * | 2008-03-07 | 2009-07-01 | 合肥工业大学 | Air-float main spindle capable of independently measuring applied force of main spindle |
-
2008
- 2008-03-07 CN CN2008100204696A patent/CN101249569B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636295A (en) * | 2012-04-25 | 2012-08-15 | 合肥工业大学 | Anti-coupling air-flotation force measuring unit |
| CN102636295B (en) * | 2012-04-25 | 2013-12-04 | 合肥工业大学 | Anti-coupling air-flotation force measuring unit |
| CN103398813A (en) * | 2013-07-25 | 2013-11-20 | 合肥工业大学 | Porous nozzle floating plate mechanism used for measuring force |
| CN103398813B (en) * | 2013-07-25 | 2015-03-11 | 合肥工业大学 | Porous nozzle floating plate mechanism used for measuring force |
| CN106644182A (en) * | 2016-11-11 | 2017-05-10 | 合肥工业大学 | Float dynamometric device provided with negative pressure groove |
| CN106644182B (en) * | 2016-11-11 | 2018-11-23 | 合肥工业大学 | Air flotation force measuring device with negative pressure trough |
| CN111941146A (en) * | 2019-05-15 | 2020-11-17 | 点八有限责任公司 | Method for driving a virtual sensor, virtual sensor and machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101249569B (en) | 2011-03-16 |
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