CN110405231A - Precise hydraulic lathe spindle - Google Patents
Precise hydraulic lathe spindle Download PDFInfo
- Publication number
- CN110405231A CN110405231A CN201910730168.0A CN201910730168A CN110405231A CN 110405231 A CN110405231 A CN 110405231A CN 201910730168 A CN201910730168 A CN 201910730168A CN 110405231 A CN110405231 A CN 110405231A
- Authority
- CN
- China
- Prior art keywords
- oil
- hole
- live spindle
- copper sheathing
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a kind of precise hydraulic lathe spindles, including live spindle and the main shaft housing being sleeved in live spindle, live spindle one end is set with driving pulley, the copper sheathing being sleeved on there are two being arranged between the main shaft housing and live spindle in live spindle, multiple second oil pockets are machined on the inner hole wall of copper sheathing, copper sheathing is machined with the first oil pocket on one side end face, the oil path distributor for connecting and be used to be passed through high pressure oil with main shaft housing one end is set in live spindle, and the dustproof cover connecting with the main shaft housing other end is further sleeved in live spindle, end face bearing is provided between the inner hole wall and live spindle of the oil path distributor.For the present invention by the way that the first oil pocket and the second oil pocket are arranged on copper sheathing, inject high oil pressure makes live spindle suspension support in copper sheathing later, forms a kind of stable support of high rotating accuracy.
Description
Technical field
The present invention relates to machine tooling technical fields, and in particular to a kind of precise hydraulic lathe spindle.
Background technique
Currently, most of lathe spindle realizes rotary motion, rotating accuracy master using ball angle bearing and roller bearing
To depend on the processing circularity of bearing and main shaft.The range of high rotating accuracy is generally required in 0.001-0.003mm, for general
The difficulty of processing of bearing is too big, even if some bearings can reach the required precision, rigidity can all decrease or even the service life
It is short with the precision retention time, it is prone to wear, therefore, this high-precision bearing is selected not to be suitable for the biography of most of light cost runnings
Unite processing enterprise.
It is most of to use static pressure oil film bearings in the prior art in order to improve the rotating accuracy of bearing, make bearing and main shaft
Contact surface formed one layer of oil film, to keep higher rotating accuracy.Although can improved by this static pressure oil film bearing
The certain rotating accuracy of main shaft, but since main shaft side is in the excessive situation that is pressurized, can make main shaft that certain deviation occur, from
And by squeeze film and oil leak situation is caused, replacement in time or maintenance are needed using long, and oil film can only be to the axis of main shaft
To centainly being supported, this be supported in the excessive situation of external force also will appear unstable situation, so having much room for improvement.
Application No. is 201120334269.5 Chinese utility model patents to disclose a kind of main axle structure improvement, it passes through
Machining center oil circuit and radial oil circuit on main shaft process corresponding axially and radially oil pocket on casing, inject high pressure oil with shape
It is supported at comprehensive oil film, to make casing and the contactless friction of main shaft, substantially increases the rotating accuracy of main shaft, but should
Scheme causes the oil film pressure of side to become larger in the case where main shaft side is pressurized overweight, it may appear that the case where of short duration reflux, from
And there is the inadequate situation of oil film supportive, finally the rotating accuracy in the pressurized process reduces.
Summary of the invention
The purpose of the present invention is to provide a kind of precise hydraulic lathe spindle, the lathe spindle on copper sheathing by being arranged
One oil pocket and the second oil pocket, inject high oil pressure makes live spindle suspension support in copper sheathing later, forms a kind of high rotating accuracy
Stablize support, while controlling by aperture fuel-flow controller the injection rate of high pressure oil, avoid squeezing because main shaft unilateral side is pressurized
The phenomenon that pressure oil film causes of short duration reflux causes oil film support unbalance serious, the rotating accuracy of main shaft is influenced in the short time.
The purpose of the present invention is what is be achieved through the following technical solutions: precise hydraulic lathe spindle, including live spindle with
And it is sleeved on the main shaft housing in live spindle, live spindle one end is set with driving pulley, the main shaft housing and rotation
It is provided at least two copper sheathings being sleeved in live spindle between main shaft, multiple second oil are machined on the inner hole wall of copper sheathing
Chamber is machined with the first oil pocket on one side end face of copper sheathing, the oil circuit connecting with main shaft housing one end is set in the live spindle
Distributor, and the dustproof cover connecting with the main shaft housing other end is further sleeved in live spindle, the inner hole of the oil path distributor
It is provided with end face bearing between wall and live spindle, one group of radial hole is machined on oil path distributor, one group of radial hole includes extremely
A few fuel feed hole, at least one oil return hole and multiple oil-control holes, fuel feed hole and multiple oil-control holes are interconnected, the oil-control
Aperture fuel-flow controller is installed in hole, multiple oil holes being connected to oil-control hole, part oil are machined in the main shaft housing
Road hole is communicated with the first oilhole between the second oil pocket of copper sheathing respectively, is connected between remaining oil hole and the first oil pocket of copper sheathing
There is the second oilhole, is provided with oil back chamber in the middle part of the main shaft housing inner cavity, is arranged between the oil back chamber and oil return hole of main shaft housing
There is back oil road.
Further, there are four the second oil pockets, four the second oil pockets to be evenly distributed on for processing on the inner hole wall of the copper sheathing
On the inner hole wall of copper sheathing, first oil pocket is the annular groove concentric with copper sheathing end face center, and one group of radial hole includes one
A fuel feed hole, two oil return holes and ten oil-control holes, wherein four oil-control holes by oil hole and the first oilhole respectively with its
In a copper sheathing the connection of four the second oil pockets, wherein four oil-control holes by oil hole and the first oilhole respectively with another copper
Four the second oil pockets connection of set, remaining two oil-control holes are oily with the first of two copper sheathings respectively by oil hole and the second oilhole
Chamber connection.
Further, be machined with oil-recovery tank between adjacent second oil pocket on the copper sleeve inner hole wall, the oil back chamber with
Oil-recovery tank connection on copper sleeve inner hole wall.
Further, ring shaped oil passage, ring shaped oil passage and fuel feed hole and control are machined on one side end face of oil path distributor
Oil-through-hole is communicated between oilhole, the aperture fuel-flow controller is and the matched column of oil-control hole shape, aperture oil mass control
Device bottom processed is provided with into oilhole, is provided on the side wall of aperture fuel-flow controller and the aperture that enters oilhole and be connected to, the aperture and oil
Road Kong Liantong.
Further, the range of aperture size of the aperture is 0.2~1mm.
Live spindle in the present invention is supported using hydraulic pressure suspension, can be with by first and second comprehensive suspension support
Accomplish " never wornout ", so as to greatly improve the rev limit of main shaft；Structure difficulty of processing of the invention simultaneously is not high, essence
Degree is easily grasped, and has very high rotating accuracy and high rigidity, and it is traditional rolling that rotating accuracy, which can achieve 0.1 μm or so,
The several times of pearl bearing can be ground in turning with vehicle generation completely；In addition, passing through setting oil path distributor and aperture fuel-flow controller energy
Enough rates of control high pressure oil injection, after live spindle unilateral side is pressurized, the oil film for squeezing serious side will not be quick because occurring
The phenomenon that reflux and keep the support of whole oil film unbalance, cause in live spindle pressurized process transient deflections excessive and influence processing essence
Degree has more reliable supportive.
Detailed description of the invention
Fig. 1 is the main sectional view at a visual angle of the invention；
Fig. 2 is the main sectional view at another visual angle of the present invention；
Fig. 3 is the main sectional view at another visual angle of the present invention；
Fig. 4 is structural schematic diagram of the invention；
Fig. 5 is the structural schematic diagram of oil path distributor in the present invention；
Fig. 6 is the structural schematic diagram at another visual angle of oil path distributor in the present invention；
Fig. 7 is the structural schematic diagram of copper sheathing in the present invention.
Marked in the figure: 1- live spindle；2- main shaft housing；3- driving pulley；4- dustproof cover；The end face 5- bearing；6- copper
Set；7- oil path distributor；8- aperture fuel-flow controller；The short oil hole of 9-；10- plug screw；The first oilhole of 11-；The second oil of 12-
Chamber；13- long oil hole；The second oilhole of 14-；The first oil pocket of 15-；16- oil back chamber；17- back oil road；18- fuel feed hole；19- oil return
Hole；20- oil-control hole；21- threaded hole；22- oil-through-hole；23- ring shaped oil passage；24- oil-recovery tank.
Specific embodiment
As shown in FIG. 1 to FIG. 7, precise hydraulic lathe spindle provided in this embodiment includes live spindle 1 and is sleeved on
Main shaft housing 2 in live spindle 1,1 one end of live spindle are set with driving pulley 3, in the present embodiment, main shaft housing 2
It is symmetrical arranged between inner cavity and live spindle 1 there are two copper sheathing 6 in live spindle 1 is sleeved on, is processed on the inner hole wall of copper sheathing 6
There are four the second oil pocket 12 (radial oil pocket), four the second oil pockets 12 are evenly distributed on the inner hole wall of copper sheathing 6, the copper sheathing 6
Oil-recovery tank 24 is machined between adjacent second oil pocket 12 on inner hole wall, the groove width of oil-recovery tank 24 is 3mm or so.Two copper sheathings 6
The first oil pocket 15 (axial oil pocket) is machined on the side end face being located remotely from each other, the first oil pocket 15 is same with 6 end face center of copper sheathing
The annular groove of the heart, is provided with the oil back chamber 16 of annular in the middle part of 2 inner cavity of main shaft housing, on oil back chamber 16 and 6 inner hole wall of copper sheathing
Oil-recovery tank 24 be connected to.
One end in the live spindle 1 close to driving pulley 3 is set with the oil connecting with 2 one side end face of main shaft housing
Distributor 7, the other end is further sleeved with the dustproof cover 4 connecting with another side end face of main shaft housing 2, the oil in live spindle 1
Distributor 7 is in the Flange-shaped Parts with inner hole, and cooperation is provided between the inner hole wall and live spindle 1 of oil path distributor 7 and is being revolved
Turn the end face bearing 5 of main shaft 1.In order to inject high pressure oil, and high pressure oil injection speed in the first oil pocket 15 and in the second oil pocket 12
Rate is controllable, is machined with one group of radial hole on the oil path distributor 7, and in the present embodiment, one group of radial hole includes a fuel feed hole
18, two oil return holes 19 and ten oil-control holes 20 are machined with ring shaped oil passage 23, ring in 7 end face outside of oil path distributor
It is communicated with oil-through-hole 22 between shape oil duct 23 and fuel feed hole 18 and oil-control hole 20, is connected to fuel feed hole 18 with all oil-control holes 20,
Seal oil ring (not shown) is provided at ring shaped oil passage 23.Aperture fuel-flow controller 8, aperture oil are combined in the oil-control hole 20
Amount controller 8 be with the matched column of 20 shape of oil-control hole, 8 bottom of aperture fuel-flow controller is provided with into oilhole, aperture oil mass
The aperture for being provided on the side wall of controller and entering oilhole and being connected to, the range of aperture size of aperture are 0.2~1mm, preferably
0.5mm reaches preferable high pressure oil flow control effect.Multiple threaded holes are processed in the end face outside of the oil path distributor 7
21, by being connected with screw hole corresponding on 2 end face of main shaft housing using stifled oil draining bolt.
Ten oil holes being connected to oil-control hole 20 are machined in the main shaft housing 2, the aperture is connected to oil hole
Keep oil inlet smooth, described ten oil holes are divided into five short oil hole 9 and five long oil hole 13, wherein four short oil roads
The first oilhole 11, remaining one short oil hole 9 are communicated between second oil pocket 12 of the copper sheathing 6 of hole 9 and close oil path distributor 7
Close to oil path distributor 7 copper sheathing 6 the first oil pocket 15 between be communicated with the second oilhole 14, wherein four long oil hole 13 with
Be communicated with the first oilhole 11 between second oil pocket 12 of the copper sheathing 6 far from oil path distributor 7, remaining one long oil hole 13 with it is remote
Be communicated with the second oilhole 14 between first oil pocket 15 of the copper sheathing 6 from oil path distributor 7, oil-control hole 20 by short oil hole 9 or
Long oil hole 13 and the first oilhole 11 be connected tos with the holding of the second oil pocket 12 of two copper sheathings 6, oil-control hole 20 pass through short oil hole 9 or
Long oil hole 13 and the second oilhole 14 are connected to the holding of the first oil pocket 15 of two copper sheathings 6, when fuel feed hole 18 injects high pressure oil,
High pressure oil, subsequently into corresponding aperture fuel-flow controller 8, is entered to corresponding short full of ring shaped oil passage 23 by aperture
In oil hole 9 or long oil hole 13, finally it is injected into the first oil pocket 15 and the second oil pocket 12 of copper sheathing 6, makes copper sheathing 6 by oil film
Suspension support is got up, and is provided with back oil road 17 between the oil back chamber 16 and oil return hole 19 of the main shaft housing 2, when high pressure oil is
When being filled in one oil pocket 15 and the second oil pocket 12, understand from minimum between 5 side wall of copper sheathing 6 and 1 side wall of live spindle or end face bearing
Gap (within 0.1mm) enter to and overflow in oil-recovery tank 24 and enter in oil back chamber 16, guarantee that high pressure oil charge velocity begins
It is much larger than the rate of oil return eventually, forms a kind of oil film of high pressure support, the high pressure oil of spilling is most afterwards through back oil road 17 from oil return hole
19 are recycled in hydraulic station by pipeline.
The working principle of the invention is: high pressure oil fills the first oil pocket 15 and the second oil pocket 12 and by 6 suspension support of copper sheathing
Get up, make contactless rotation between live spindle 1 and copper sheathing 6, substantially increase rotating accuracy, when live spindle 1 or transmission
3 side of belt pulley be pressurized than it is more serious when, live spindle 1 can seriously be deviated toward side in principle, to squeeze the first oil pocket 15
Or the interior oil film formed of the second oil pocket 12 causes unit empty so that the enclosure space of 1 opposite sides of live spindle be made to change
Interior pressure value variation, causes to lose pressure balance, to backflow phenomenon occur after so that unilateral high pressure oil is pressurized, due to aperture
Aperture is smaller, and the high pressure oil of reflux can not generate apparent backflow phenomenon by aperture in time, therefore work as 1 side of live spindle
When compression, the oil film flow velocity for being extruded side is almost unchanged, to form a kind of stable support, guarantees live spindle 1 short
More serious offset will not occur for the time, finally guarantee that the rotating accuracy variable quantity of live spindle 1 is little.In view of this hair
The axial hole and radial hole processed in bright structure are relatively more, the first oilhole 11 in order to reduce difficulty of processing, in main shaft housing 2
The form of through-hole is all made of with the second oilhole 14, in this way be convenient for drilling processing, then by the other end drilling by plug screw 10 into
Row seals, and greatly reduces the difficulty of processing of the first oilhole 11 and the second oilhole 14 in this way.
The above is only the preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, any
The transformation and replacement carried out based on technical solution provided by the present invention and inventive concept should all be covered in protection model of the invention
In enclosing.
Claims (5)
1. precise hydraulic lathe spindle, including live spindle and the main shaft housing being sleeved in live spindle, live spindle one
End cap is equipped with driving pulley, it is characterised in that: is provided at least two between the main shaft housing and live spindle and is sleeved on
Copper sheathing in live spindle is machined with multiple second oil pockets on the inner hole wall of copper sheathing, and the first oil is machined on one side end face of copper sheathing
Chamber is set with the oil path distributor connecting with main shaft housing one end in the live spindle, and be further sleeved in live spindle with
The dustproof cover of main shaft housing other end connection, is provided with end face axis between the inner hole wall and live spindle of the oil path distributor
Hold, be machined with one group of radial hole on oil path distributor, one group of radial hole include at least one fuel feed hole, at least one oil return hole with
And multiple oil-control holes, fuel feed hole and multiple oil-control holes are interconnected, and aperture fuel-flow controller is equipped in the oil-control hole, it is described
Multiple oil holes being connected to oil-control hole are machined in main shaft housing, part oil hole connects between the second oil pocket of copper sheathing respectively
It is connected with the first oilhole, is communicated with the second oilhole between remaining oil hole and the first oil pocket of copper sheathing, in the main shaft housing inner cavity
Portion is provided with oil back chamber, is provided with back oil road between the oil back chamber and oil return hole of main shaft housing.
2. precise hydraulic lathe spindle according to claim 1, it is characterised in that: be machined on the inner hole wall of the copper sheathing
Four the second oil pockets, four the second oil pockets are evenly distributed on the inner hole wall of copper sheathing, first oil pocket be in copper sheathing end face
The concentric annular groove of the heart, one group of radial hole includes a fuel feed hole, two oil return holes and ten oil-control holes, wherein four
Oil-control hole is connected to four the second oil pockets of one of copper sheathing respectively by oil hole and the first oilhole, wherein four oil-control holes
It is connected to respectively with four the second oil pockets of another copper sheathing by oil hole and the first oilhole, remaining two oil-control holes pass through oil duct
Hole and the second oilhole are connected to the first oil pocket of two copper sheathings respectively.
3. precise hydraulic lathe spindle according to claim 2, it is characterised in that: adjacent on the copper sleeve inner hole wall
Oil-recovery tank is machined between two oil pockets, the oil back chamber is connected to the oil-recovery tank on copper sleeve inner hole wall.
4. precise hydraulic lathe spindle according to claim 1 or 2, it is characterised in that: one side of oil path distributor
It is machined on face between ring shaped oil passage, ring shaped oil passage and fuel feed hole and oil-control hole and is communicated with oil-through-hole, the aperture fuel-flow control
Device be with the matched column of oil-control hole shape, aperture fuel-flow controller bottom is provided with into oilhole, the side of aperture fuel-flow controller
The aperture for being provided on wall and entering oilhole and being connected to, the aperture are connected to oil hole.
5. precise hydraulic lathe spindle according to claim 4, it is characterised in that: the range of aperture size of the aperture is
0.2~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730168.0A CN110405231A (en) | 2019-08-08 | 2019-08-08 | Precise hydraulic lathe spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730168.0A CN110405231A (en) | 2019-08-08 | 2019-08-08 | Precise hydraulic lathe spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110405231A true CN110405231A (en) | 2019-11-05 |
Family
ID=68366625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910730168.0A Pending CN110405231A (en) | 2019-08-08 | 2019-08-08 | Precise hydraulic lathe spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110405231A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113131A (en) * | 2019-12-30 | 2020-05-08 | 湖南中大创远数控装备有限公司 | Main shaft damping mechanism |
| CN111336395A (en) * | 2020-04-13 | 2020-06-26 | 威海柳韩机械有限公司 | Oil supply and recovery device for rotating shaft |
| CN115106555A (en) * | 2022-07-05 | 2022-09-27 | 益阳益北精密机械有限公司 | Static pressure servo spindle system for processing machine tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002004828A1 (en) * | 2000-07-10 | 2002-01-17 | Bently Nevada Corporation | A hydrostatic bearing |
| CN101653834A (en) * | 2009-07-31 | 2010-02-24 | 芜湖洪金机床有限公司 | Hydraulically automatic indexing chuck |
| CN105673689A (en) * | 2016-03-22 | 2016-06-15 | 宁波圣圭精工科技有限公司 | Hybrid bearing and main shaft provided with hybrid bearing |
| CN106826547A (en) * | 2017-03-01 | 2017-06-13 | 新昌县华科机电设备有限公司 | A kind of cantilevered is combined hydrostatic pressure main shaft high |
| CN206883437U (en) * | 2017-03-01 | 2018-01-16 | 新昌县华科机电设备有限公司 | A kind of main shaft supporting structure for high hydrostatic pressure main shaft |
-
2019
- 2019-08-08 CN CN201910730168.0A patent/CN110405231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002004828A1 (en) * | 2000-07-10 | 2002-01-17 | Bently Nevada Corporation | A hydrostatic bearing |
| CN101653834A (en) * | 2009-07-31 | 2010-02-24 | 芜湖洪金机床有限公司 | Hydraulically automatic indexing chuck |
| CN105673689A (en) * | 2016-03-22 | 2016-06-15 | 宁波圣圭精工科技有限公司 | Hybrid bearing and main shaft provided with hybrid bearing |
| CN106826547A (en) * | 2017-03-01 | 2017-06-13 | 新昌县华科机电设备有限公司 | A kind of cantilevered is combined hydrostatic pressure main shaft high |
| CN206883437U (en) * | 2017-03-01 | 2018-01-16 | 新昌县华科机电设备有限公司 | A kind of main shaft supporting structure for high hydrostatic pressure main shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111113131A (en) * | 2019-12-30 | 2020-05-08 | 湖南中大创远数控装备有限公司 | Main shaft damping mechanism |
| CN111336395A (en) * | 2020-04-13 | 2020-06-26 | 威海柳韩机械有限公司 | Oil supply and recovery device for rotating shaft |
| CN115106555A (en) * | 2022-07-05 | 2022-09-27 | 益阳益北精密机械有限公司 | Static pressure servo spindle system for processing machine tool |
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Application publication date: 20191105 |
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