CN201264102Y - Air-float main spindle capable of independently measuring applied force of main spindle - Google Patents
Air-float main spindle capable of independently measuring applied force of main spindle Download PDFInfo
- Publication number
- CN201264102Y CN201264102Y CNU2008200328054U CN200820032805U CN201264102Y CN 201264102 Y CN201264102 Y CN 201264102Y CN U2008200328054 U CNU2008200328054 U CN U2008200328054U CN 200820032805 U CN200820032805 U CN 200820032805U CN 201264102 Y CN201264102 Y CN 201264102Y
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- China
- Prior art keywords
- main shaft
- air
- gas
- main spindle
- restricting element
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- Expired - Fee Related
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Abstract
The utility model relates to a gas spindle which can measure the stress of a main spindle and uses the main spindle as a floating body and air current output by a main spindle floating system through a restricting element as a main spindle full floating supporting body, and a bearing cavity is formed between an outlet of the restricting element and a supporting surface of the main spindle. The gas spindle is characterized by being provided with a gas pressure or gas flow measuring mechanism, the gas pressure measurement uses the gas pressure of the bearing cavity or the backing pressure of the restricting element as detecting signals, and the gas flow measurement uses the flowing speed or the flow of the air current in the bearing cavity or the restricting element as detecting signals. The utility model can be used for monitoring the operating condition of a gas bearing in real-time and immediately finding the failure and the hidden trouble, can measure the change of the cutting force in real time during the precision cutting processing, monitors the working condition of a cutter, and improves the processing precision.
Description
Technical field
The utility model relates to main axle structure, a kind of stressed air-floating main shaft of main shaft that can be used for independently measuring 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.
The utility model content
The utility model 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 utility model technical solution problem adopts following technical scheme:
The utility model can independently be measured 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 the utility model air-floating main shaft 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.
It is gas pressure or each flow parameter of gas flow of measuring in the main shaft air-flotation system that the utility model is independently measured the stressed method of air-floating main shaft, 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, the beneficial effects of the utility model are embodied in:
The utility model air-floating main shaft 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 the utility model measuring principle schematic diagram.
Fig. 2 is the utility model air-floating main shaft measuring principle schematic diagram.
Fig. 3 is applied in structural representation in the lathe for the utility model air-floating main shaft.
Fig. 4 the utility model force analysis schematic diagram.
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 utility model is described in further detail 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 (1)
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); End at described main shaft (6) is provided with the main shaft axle collar (14), and 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200328054U CN201264102Y (en) | 2008-03-07 | 2008-03-07 | Air-float main spindle capable of independently measuring applied force of main spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200328054U CN201264102Y (en) | 2008-03-07 | 2008-03-07 | Air-float main spindle capable of independently measuring applied force of main spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201264102Y true CN201264102Y (en) | 2009-07-01 |
Family
ID=40830449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200328054U Expired - Fee Related CN201264102Y (en) | 2008-03-07 | 2008-03-07 | Air-float main spindle capable of independently measuring applied force of main spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201264102Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249569B (en) * | 2008-03-07 | 2011-03-16 | 合肥工业大学 | Air-float chief axis capable of independently measuring chief axis applied force and measurement method thereof |
| CN111673644A (en) * | 2020-06-24 | 2020-09-18 | 华海清科股份有限公司 | Device and method for testing rigidity of grinding spindle |
-
2008
- 2008-03-07 CN CNU2008200328054U patent/CN201264102Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249569B (en) * | 2008-03-07 | 2011-03-16 | 合肥工业大学 | Air-float chief axis capable of independently measuring chief axis applied force and measurement method thereof |
| CN111673644A (en) * | 2020-06-24 | 2020-09-18 | 华海清科股份有限公司 | Device and method for testing rigidity of grinding spindle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20100307 |