CN108161036A - A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force - Google Patents
A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force Download PDFInfo
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- CN108161036A CN108161036A CN201810210395.6A CN201810210395A CN108161036A CN 108161036 A CN108161036 A CN 108161036A CN 201810210395 A CN201810210395 A CN 201810210395A CN 108161036 A CN108161036 A CN 108161036A
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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
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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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
- 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
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
- B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force, rotor loss fever for electro spindle devises double water-cooling structures, the high efficiency and heat radiation of rotor is realized by two layers of cooling jacket inside and outside housing, reduces influence of the fever high temperature of rotor to main shaft and bearing；It generates heat for bearing self friction, bearing outer ring fixing sleeve is designed to cooling water jacket structure, the high efficiency and heat radiation of bearing is realized by the bearing outer ring fixing sleeve with water cooling function, then be aided with high-efficiency lubricating, reduce bearing thermal deformation；Under higher speed conditions, water cooling can decline with lubricant effect, influence of thermal deformation must be offset by applying suitable pretightning force to bearing, bearing temperature is monitored by the temperature sensor of bearing pre-fastening automatic adjusting mechanism in real time first, and by the bearing temperature data feedback monitored to machine tool numerical control system, control signal is exported by machine tool numerical control system again, the elongation of piezoelectric ceramics column is made to change, to generate suitable bearing pre-fastening.
Description
Technical field
The invention belongs to electrical spindle for machine tool technical fields, have adding for self-adjustable bearing pretightning force more particularly to a kind of
Work center ultrasonic wave electro spindle.
Background technology
Recent years, more and more machining centers employed ultrasonic wave electro spindle, and ultrasonic wave electro spindle not only has structure
Compact, light-weight, the advantages that inertia is small, noise is low, response is fast, rotating speed is high and power is big, and can be carried out using ultrasonic wave
Secondary process.Electro spindle is the new technology that machine tool chief axis and spindle drive motor combine together, and this by machine tool chief axis and master
The drive mechanism form of axis motor " being combined into one " effectively makes spindle unit phase from the transmission system and overall structure of lathe
To independent, and machine tool chief axis is then directly driven by built-in motor, so as to which the length of Machine Tool Main Drive chain is shorten to
Zero, it realizes " Zero-drive Chain " of lathe.
Since the machining accuracy of lathe directly determines the Precision Machining quality of part, while the running precision of electro spindle is again
The machining accuracy of lathe is directly affected, therefore, it is desirable to ensure the Precision Machining quality of part, just it has to be ensured that the fortune of electro spindle
Row precision.And the running precision of electro spindle is codetermined by factors, one of them is the pretightning force of bearing, axis
The core component for electro spindle is made, bearing pre-fastening not only decides performance and the service life of bearing, can also influence electro spindle axis
The Oscillation Amplitude at end, with the variation of processing operating mode, the temperature of bearing may be increased quickly, and bearing is caused thermal deformation occur,
And the support accuracy of bearing can also change correspondingly, in order to reduce the amplitude of variation of bearings precision, usual means are exactly to pass through
Spring provides pretightning force, but is exported preload force mode by spring and limited, and it is that can not adjust to lead to the pretightning force that spring exports
Section, since bearing pre-fastening can not be adjusted, the thermal deformation of bearing also can not be just coped with by suitable pretightning force.Therefore,
Apply the machining center ultrasonic wave electro spindle of component as pretightning force using spring at this stage, the generally existing rotating speed the high, processes
The lower situation of precision, this seriously constrains the high speed development of machining center.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of machining center for having self-adjustable bearing pretightning force
Ultrasonic wave electro spindle introduces bearing pre-fastening automatic regulation function, while will pressure for the first time in work in-process heart ultrasonic wave electro spindle
Electroceramics can export according to the temperature adjust automatically pretightning force of bearing as pretightning force output block, bearing has been effectively ensured
Support accuracy, the high speed development for machining center provides powerful guarantee, while for the Wen Sheng for further reducing bearing, goes back
Optimize cooling and the lubrication system of electro spindle.
To achieve these goals, the present invention adopts the following technical scheme that：It is a kind of to have self-adjustable bearing pretightning force
Machining center ultrasonic wave electro spindle, including main shaft, housing, upper end cover, bottom end cover, rotor coil, stator coil；The rotor line
Circle is fixedly set in the middle part of main shaft, and the stator coil is fixedly mounted on shell inner surface, and adds between stator coil and housing
Equipped with the first cooling jacket, the housing outer surface of axial positions adds the second cooling jacket where the first cooling jacket；
The first spiral cooling water channel is provided in first cooling jacket, the first spiral cooling water channel water inlet and the first spiral are cold
But water channel water outlet is arranged on housing；The second spiral cooling water channel, the second spiral shell are provided in second cooling jacket
Rotation cooling water channel water inlet and the second spiral cooling water channel water outlet are set up directly on the second cooling jacket；Described first
Spiral cooling water channel water inlet, the first spiral cooling water channel water outlet, the second spiral cooling water channel water inlet and the second spiral are cold
But it is mounted on cooling water on water channel water outlet and connects mouth；The upper end cover is packed in housing tip nozzle, and the bottom end cover is fixedly mounted with
In housing bottom end nozzle, and switching sleeve is added between bottom end cover and housing, the main shaft sequentially pass through switching sleeve and under
End cap simultaneously extends to hull outside；On main shaft between the bottom end cover and rotor coil, it is set with successively from the bottom to top
One angular contact ball bearing, clutch shaft bearing lubricating sleeve and the second angular contact ball bearing, the first angular contact ball bearing and the second angular contact
The inner ring of ball bearing is connect with main shaft interference, the outer ring of the first angular contact ball bearing and the second angular contact ball bearing by bearing outside
The first fixing sleeve is enclosed to connect with switching sleeve inner surface interference；On the main shaft above the rotor coil, from the bottom to top successively
It is set with rotor clamp nut, third angular contact ball bearing, second bearing lubricating sleeve, fourth angle contact ball bearing, bearing pre-tightened
Power automatic adjusting mechanism and bearing axial limiting nut, the inner ring and master of third angular contact ball bearing and fourth angle contact ball bearing
Axis interference connects, and the outer ring of third angular contact ball bearing and fourth angle contact ball bearing passes through the second fixing sleeve of bearing outer ring and shell
Body interference connection, the second bearing lubricating sleeve and bearing pre-fastening automatic adjusting mechanism and bearing outer ring the second fixing sleeve interference
Connection；The bearing axial limiting nut is threadedly coupled with the second fixing sleeve of bearing outer ring；The main shaft is hollow shaft, in main shaft
Centre bore in be equipped with pull rod, pull rod top extends the upper aperture of main shaft, pull rod axial limiting spiral shell is equipped on pull rod top
Mother is set with disc spring on main shaft top, power transmission casing is provided between pull rod axial direction stop nut and disc spring；In the pull rod just
The upper end cover lower surface of top is equipped with hydraulic cylinder, the piston rod of hydraulic cylinder downward, and the piston rod of hydraulic cylinder and pull rod top
Face is set；It is fixed with supersonic generator, ultrasonic transformer and handle of a knife retaining mechanism, handle of a knife locking machine successively in the pull rod bottom end
Structure is used cooperatively with handle of a knife.
The first oil leab is provided in first fixing sleeve of bearing outer ring, is provided in the switching sleeve
Two oil leabs, the oil outlet end of the first oil leab are communicated with clutch shaft bearing lubricating sleeve, the oil inlet end of the first oil leab and
The oil outlet end of two oil leabs communicates, and being equipped with the first lubricating oil in the oil inlet end of the second oil leab connects mouth.
Electro spindle Wiring port is installed on the upper end cover；Is provided in second fixing sleeve of bearing outer ring
Three oil leabs, the oil outlet end of third oil leab are communicated with second bearing lubricating sleeve, offer the 4th profit on the housing
Grease way, the oil inlet end of third oil leab are communicated with the oil outlet end of the 4th oil leab, the oil inlet end peace of the 4th oil leab
Mouth is connect equipped with the second lubricating oil.
Annular cooling water slot is additionally provided in first fixing sleeve of bearing outer ring, is set respectively on the switching sleeve
Annular cooling water slot inlet channel and annular cooling water slot water outlet water channel are equipped with, and annular cooling water slot inlet channel and annular are cold
But there is 180 ° of angle between sink water outlet water channel.
The bearing pre-fastening automatic adjusting mechanism includes piezoelectric ceramics column, piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk, spring, the second force transmiting disk and temperature sensor；Piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk and the equal interference of the second force transmiting disk are connected on the second fixing sleeve of bearing outer ring；The piezoelectricity pottery
Porcelain knob quantity is several, and several piezoelectric ceramics columns are circumferentially uniformly arranged in piezoelectric ceramics column fixed seat；In the piezoelectric ceramics column
Piezoelectric ceramics column location hole is offered on radial positioning disk, piezoelectric ceramics column passes through piezoelectric ceramics column location hole and the first force transmiting disk
Abut against contact；The spring is connected between the first force transmiting disk and the second force transmiting disk, and the second force transmiting disk abuts against contact in fourth angle
On the outer ring of contact ball bearing；The number of springs is several, and several springs are circumferential between the first force transmiting disk and the second force transmiting disk
It is uniformly arranged；The temperature sensor is mounted on the second force transmiting disk, the temperature that piezoelectric ceramics column passes through temperature sensor feedback
Data point reuse axial elongation carries out the automatic adjustment of bearing pre-fastening by adjusting piezoelectric ceramics column axial elongation.
Beneficial effects of the present invention：
The present invention the machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force, for the first time the work in-process heart surpass
Bearing pre-fastening automatic regulation function is introduced in sound wave electro spindle, while using piezoelectric ceramics as pretightning force output block, it can
It is exported according to the temperature adjust automatically pretightning force of bearing, bearings precision has been effectively ensured, be that the high speed of machining center is sent out
Exhibition provides powerful guarantee, while for the Wen Sheng for further reducing bearing, also optimize cooling and the lubrication system of electro spindle.
Description of the drawings
Fig. 1 is a kind of machining center ultrasonic wave electric main shaft structure signal for having self-adjustable bearing pretightning force of the present invention
Figure；
Fig. 2 is I portions enlarged drawing in Fig. 1；
In figure, 1-main shaft, 2-housing, 3-upper end cover, 4-bottom end cover, 5-rotor coil, 6-stator coil, 7-
First cooling jacket, the 8-the second cooling jacket, the 9-the first spiral cooling water channel, the 10-the first spiral cooling water channel water inlet,
11-the first spiral cooling water channel water outlet, the 12-the second spiral cooling water channel, the 13-the second spiral cooling water channel water inlet,
14-the second spiral cooling water channel water outlet, 15-switching sleeve, the 16-the first angular contact ball bearing, 17-clutch shaft bearing lubrication
Set, the 18-the second angular contact ball bearing, 19-bearing pre-fastening automatic adjusting mechanism, the first fixing sleeve of 20-bearing outer ring,
21-rotor clamp nut, 22-third angular contact ball bearing, 23-second bearing lubricating sleeve, 24-fourth angle contact ball axis
It holds, 25-bearing axial limiting nut, the second fixing sleeve of 26-bearing outer ring, 27-pull rod, 28-pull rod axial direction stop nut,
29-disc spring, 30-power transmission casing, 31-hydraulic cylinder, 32-supersonic generator, 33-ultrasonic transformer, 34-handle of a knife locking machine
Structure, 35-handle of a knife, the 36-the first oil leab, the 37-the second oil leab, the 38-the first lubricating oil connect mouth, and 39-electro spindle connects
Line end mouth, 40-third oil leab, the 41-the four oil leab, the 42-the second lubricating oil connect mouth, 43-annular cooling water slot,
44-annular cooling water slot inlet channel, 45-annular cooling water slot water outlet water channel, 46-piezoelectric ceramics column, 47-piezoelectric ceramics
Column fixed seat, 48-piezoelectric ceramics column radial positioning disk, the 49-the first force transmiting disk, 50-spring, the 51-the second force transmiting disk, 52-
Temperature sensor.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, 2, a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force, including main shaft
1st, housing 2, upper end cover 3, bottom end cover 4, rotor coil 5, stator coil 6；The rotor coil 5 is fixedly set in 1 middle part of main shaft,
The stator coil 6 is fixedly mounted on 2 inner surface of housing, and the first cooling jacket 7 is added between stator coil 6 and housing 2,
The second cooling jacket 8 is added in 2 outer surface of housing of 7 place axial positions of the first cooling jacket；In the described first cooling
The first spiral cooling water channel 9, the first spiral cooling water channel water inlet 10 and the water outlet of the first spiral cooling water channel are provided in water jacket 7
Mouth 11 is arranged on housing 2；The second spiral cooling water channel 12 is provided in second cooling jacket 8, the second spiral is cold
But 13 and second spiral cooling water channel water outlet 14 of water channel water inlet is set up directly on the second cooling jacket 8；Described
One spiral cooling water channel water inlet 10, the first spiral cooling water channel water outlet 11, the second spiral cooling water channel water inlet 13 and
Cooling water, which is mounted on, on two spiral cooling water channel water outlets 14 connects mouth；The upper end cover 3 is packed in 2 top nozzle of housing, institute
State bottom end cover 4 and be packed in 2 bottom end nozzle of housing, and switching sleeve 15 is added between bottom end cover 4 and housing 2, the main shaft 1 according to
It is secondary to pass through switching sleeve 15 and bottom end cover 4 and extend to 2 outside of housing；Main shaft between the bottom end cover 4 and rotor coil 5
On 1, it is set with the first angular contact ball bearing 16,17 and second angular contact ball bearing of clutch shaft bearing lubricating sleeve successively from the bottom to top
18, the inner ring of the first angular contact ball bearing 16 and the second angular contact ball bearing 18 is connect with 1 interference of main shaft, the first angular contact ball axis
Hold 16 and second the outer ring of angular contact ball bearing 18 pass through the first fixing sleeve of bearing outer ring 20 and 15 inner surface interference of switching sleeve
Connection；On the main shaft 1 above the rotor coil 5, it is set with rotor clamp nut 21, third angular contact successively from the bottom to top
Ball bearing 22, second bearing lubricating sleeve 23, fourth angle contact ball bearing 24, bearing pre-fastening automatic adjusting mechanism 19 and bearing axis
To stop nut 25, the inner ring of third angular contact ball bearing 22 and fourth angle contact ball bearing 24 is connect with 1 interference of main shaft, third
The outer ring of angular contact ball bearing 22 and fourth angle contact ball bearing 24 is connected by the second fixing sleeve of bearing outer ring 26 and 2 interference of housing
It connects, the second bearing lubricating sleeve 23 and bearing pre-fastening automatic adjusting mechanism 19 connect with 26 interference of the second fixing sleeve of bearing outer ring
It connects；The bearing axial limiting nut 25 is threadedly coupled with the second fixing sleeve of bearing outer ring 26；The main shaft 1 is hollow shaft,
Pull rod 27 is equipped in the centre bore of main shaft 1,27 top of pull rod extends the upper aperture of main shaft 1, drawing is equipped on 27 top of pull rod
Bar axial limiting nut 28 is set with disc spring 29 on 1 top of main shaft, is provided between pull rod axial direction stop nut 28 and disc spring 29
Power transmission casing 30；3 lower surface of upper end cover right over the pull rod 27 is equipped with hydraulic cylinder 31, the piston rod court of hydraulic cylinder 31
Under, and the piston rod of hydraulic cylinder 31 is set with 27 top face of pull rod；It is fixed with ultrasonic wave hair successively in 27 bottom end of pull rod
Raw device 32, ultrasonic transformer 33 and handle of a knife retaining mechanism 34, handle of a knife retaining mechanism 34 are used cooperatively with handle of a knife 35.
The first oil leab 36 is provided in first fixing sleeve of bearing outer ring 20, is set in the switching sleeve 15
The second oil leab 37 is equipped with, the oil outlet end of the first oil leab 36 is communicated with clutch shaft bearing lubricating sleeve 17, the first oil leab
36 oil inlet end is communicated with the oil outlet end of the second oil leab 37, and the first lubrication is equipped in the oil inlet end of the second oil leab 37
Oil connects mouth 38.
Electro spindle Wiring port 39 is installed on the upper end cover 3；It is set in second fixing sleeve of bearing outer ring 26
Third oil leab 40 is equipped with, the oil outlet end of third oil leab 40 is communicated with second bearing lubricating sleeve 23, on the housing 2
The 4th oil leab 41 is offered, the oil inlet end of third oil leab 40 is communicated with the oil outlet end of the 4th oil leab 41, and the 4th
The oil inlet end of oil leab 41 is equipped with the second lubricating oil and connects mouth 42.
Annular cooling water slot 43 is additionally provided in first fixing sleeve of bearing outer ring 20, on the switching sleeve 15
It is respectively arranged with annular cooling water slot inlet channel 44 and annular cooling water slot water outlet water channel 45, and annular cooling water slot water inlet water
There is 180 ° of angle between road 44 and annular cooling water slot water outlet water channel 45.
The bearing pre-fastening automatic adjusting mechanism 19 includes piezoelectric ceramics column 46, piezoelectric ceramics column fixed seat 47, piezoelectricity
Ceramics pole radial positioning disk 48, the first force transmiting disk 49, spring 50, the second force transmiting disk 51 and temperature sensor 52；Piezoelectric ceramics column
Fixed seat 47, piezoelectric ceramics column radial positioning disk 48, the first force transmiting disk 49 and the 51 equal interference of the second force transmiting disk are connected to outside bearing
It encloses on the second fixing sleeve 26；46 quantity of piezoelectric ceramics column is several, and several piezoelectric ceramics columns 46 are in piezoelectric ceramics column fixed seat
It is circumferentially uniformly arranged on 38；Piezoelectric ceramics column location hole, piezoelectricity pottery are offered on the piezoelectric ceramics column radial positioning disk 39
Porcelain knob 46 is abutted against with the first force transmiting disk 49 across piezoelectric ceramics column location hole and is contacted；The spring 50 is connected to the first force transmiting disk 49
Between the second force transmiting disk 51, the second force transmiting disk 51 abuts against contact on the outer ring of fourth angle contact ball bearing 24；The spring
50 quantity are several, and several springs 50 are circumferentially uniformly arranged between the first force transmiting disk 49 and the second force transmiting disk 51；The temperature passes
Sensor 52 is mounted on the second force transmiting disk 51, and piezoelectric ceramics column 46 is adjusted axial by the temperature data that temperature sensor 52 is fed back
Elongation carries out the automatic adjustment of bearing pre-fastening by adjusting 46 axial elongation of piezoelectric ceramics column.
In work in-process heart operational process, temperature factor is to influence the primary factor of machining accuracy, in order to reduce in processing
The fever behavior of heart ultrasonic wave electro spindle, the present invention have been specifically designed double water-cooling structures for rotor loss fever, have passed through first
7 and second cooling jacket 8 of cooling jacket quickly generates heat with the loss of rotor, the temperature of rotor is effectively reduced, so as to drop
The harmful effect that the fever high temperature of low rotor generates main shaft 1 and bearing.In addition, in addition to this influence of generating heat is lost in rotor
Factor, also the bearing frictional heating of itself, the present invention is for the also individually designed water-cooling structure of bearing friction fever, same to hour hands
Lubrication system is devised to all bearings, is aided with water-cooling while bearing friction degree is reduced, utmostly limits
The frictional heating of bearing.
Above-mentioned means are all quick raised for preventing bearing temperature from occurring, and utmostly alleviate the thermal deformation of bearing,
But continue to improve with rotating speed, the effect for alleviating bearing thermal deformation can be played by way of water-cooling and bearing lubrication
It can continuously decrease, at this time in order to ensure the machine finish under high-speed state, bearing pre-fastening of the invention automatically adjusts
Mechanism 19 will gradually work.With the raising of rotating speed, the cooling rate of water-cooling and bearing lubrication has been unable to catch up with bearing
Heating rate then needs to offset bearing thermal deformation adverse effect by suitable bearing pre-fastening at this time, first
Bearing temperature is monitored, and will real-time monitor by the temperature sensor 52 in bearing pre-fastening automatic adjusting mechanism 19 in real time
Bearing temperature data feedback to machine tool numerical control system, then by machine tool numerical control system export control signal, make piezoelectric ceramics column
46 elongation changes, and to generate suitable bearing pre-fastening, utmostly reduces because bearing thermal deformation is to processing essence
The influence generated is spent, so as to ensure that the basicly stable of bearings precision, the final high speed development for machining center provides
Powerful guarantee.
Scheme in embodiment is not the scope of patent protection to limit the present invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the claims of this case.
Claims (5)
1. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force, it is characterised in that：Including main shaft, shell
Body, upper end cover, bottom end cover, rotor coil, stator coil；The rotor coil is fixedly set in the middle part of main shaft, the stator line
Circle is fixedly mounted on shell inner surface, and the first cooling jacket is added between stator coil and housing, in the first cooling jacket
The housing outer surface of place axial positions adds the second cooling jacket；The first spiral shell is provided in first cooling jacket
Cooling water channel is revolved, the first spiral cooling water channel water inlet and the first spiral cooling water channel water outlet are arranged on housing；Institute
It states and the second spiral cooling water channel is provided in the second cooling jacket, the second spiral cooling water channel water inlet and the second spiral cooling water
Road water outlet is set up directly on the second cooling jacket；It is cooled down in the first spiral cooling water channel water inlet, the first spiral
Cooling water is mounted on water channel water outlet, the second spiral cooling water channel water inlet and the second spiral cooling water channel water outlet to connect
Mouth；The upper end cover is packed in housing tip nozzle, and the bottom end cover is packed in housing bottom end nozzle, and bottom end cover and housing it
Between add switching sleeve, the main shaft sequentially passes through switching sleeve and bottom end cover and extends to hull outside；In the lower end
Cover rotor coil between main shaft on, be set with successively from the bottom to top the first angular contact ball bearing, clutch shaft bearing lubricating sleeve and
The inner ring of second angular contact ball bearing, the first angular contact ball bearing and the second angular contact ball bearing is connect with main shaft interference, and first
The outer ring of angular contact ball bearing and the second angular contact ball bearing passes through the first fixing sleeve of bearing outer ring and switching sleeve inner surface mistake
It is full of connection；On the main shaft above the rotor coil, it is set with rotor clamp nut, third angular contact ball successively from the bottom to top
Bearing, second bearing lubricating sleeve, fourth angle contact ball bearing, bearing pre-fastening automatic adjusting mechanism and bearing axial limiting spiral shell
The inner ring of mother, third angular contact ball bearing and fourth angle contact ball bearing is connect with main shaft interference, third angular contact ball bearing and
The outer ring of fourth angle contact ball bearing is connect by the second fixing sleeve of bearing outer ring with housing interference, the second bearing lubricating sleeve
And bearing pre-fastening automatic adjusting mechanism is connect with bearing outer ring the second fixing sleeve interference；The bearing axial limiting nut and axis
The second fixing sleeve of bearing outer-ring is threadedly coupled；The main shaft is hollow shaft, pull rod is equipped in the centre bore of main shaft, pull rod top is prolonged
The upper aperture of main shaft is stretched out, pull rod axial direction stop nut on pull rod top is installed, disc spring, pull rod shaft are set on main shaft top
Power transmission casing is provided between stop nut and disc spring；Upper end cover lower surface right over the pull rod is equipped with hydraulic pressure
Cylinder, downward, and the piston rod of hydraulic cylinder is set the piston rod of hydraulic cylinder with pull rod top face；It is solid successively in the pull rod bottom end
Supersonic generator, ultrasonic transformer and handle of a knife retaining mechanism are connected with, handle of a knife retaining mechanism is used cooperatively with handle of a knife.
2. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that：The first oil leab is provided in first fixing sleeve of bearing outer ring, is provided in the switching sleeve
Second oil leab, the oil outlet end of the first oil leab are communicated with clutch shaft bearing lubricating sleeve, the oil inlet end of the first oil leab with
The oil outlet end of second oil leab communicates, and being equipped with the first lubricating oil in the oil inlet end of the second oil leab connects mouth.
3. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that：Electro spindle Wiring port is installed on the upper end cover；It is provided in second fixing sleeve of bearing outer ring
Third oil leab, the oil outlet end of third oil leab are communicated with second bearing lubricating sleeve, offer the 4th on the housing
Oil leab, the oil inlet end of third oil leab are communicated with the oil outlet end of the 4th oil leab, the oil inlet end of the 4th oil leab
Second lubricating oil is installed and connects mouth.
4. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that：Annular cooling water slot is additionally provided in first fixing sleeve of bearing outer ring, on the switching sleeve respectively
It is provided with annular cooling water slot inlet channel and annular cooling water slot water outlet water channel, and annular cooling water slot inlet channel and annular
There is 180 ° of angle between bosh water outlet water channel.
5. a kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force according to claim 1,
It is characterized in that：The bearing pre-fastening automatic adjusting mechanism includes piezoelectric ceramics column, piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk, spring, the second force transmiting disk and temperature sensor；Piezoelectric ceramics column fixed seat, piezoelectric ceramics column
Radial positioning disk, the first force transmiting disk and the equal interference of the second force transmiting disk are connected on the second fixing sleeve of bearing outer ring；The piezoelectricity pottery
Porcelain knob quantity is several, and several piezoelectric ceramics columns are circumferentially uniformly arranged in piezoelectric ceramics column fixed seat；In the piezoelectric ceramics column
Piezoelectric ceramics column location hole is offered on radial positioning disk, piezoelectric ceramics column passes through piezoelectric ceramics column location hole and the first force transmiting disk
Abut against contact；The spring is connected between the first force transmiting disk and the second force transmiting disk, and the second force transmiting disk abuts against contact in fourth angle
On the outer ring of contact ball bearing；The number of springs is several, and several springs are circumferential between the first force transmiting disk and the second force transmiting disk
It is uniformly arranged；The temperature sensor is mounted on the second force transmiting disk, the temperature that piezoelectric ceramics column passes through temperature sensor feedback
Data point reuse axial elongation carries out the automatic adjustment of bearing pre-fastening by adjusting piezoelectric ceramics column axial elongation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810210395.6A CN108161036B (en) | 2018-03-14 | 2018-03-14 | Machining center ultrasonic electric spindle with automatic bearing pretightening force adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810210395.6A CN108161036B (en) | 2018-03-14 | 2018-03-14 | Machining center ultrasonic electric spindle with automatic bearing pretightening force adjustment function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161036A true CN108161036A (en) | 2018-06-15 |
| CN108161036B CN108161036B (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810210395.6A Active CN108161036B (en) | 2018-03-14 | 2018-03-14 | Machining center ultrasonic electric spindle with automatic bearing pretightening force adjustment function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848445A (en) * | 2019-04-01 | 2019-06-07 | 湖南广播电视大学 | A kind of lathe main axis device |
| WO2020025828A1 (en) * | 2018-08-03 | 2020-02-06 | Franz Kessler Gmbh | Motor spindle for a machine, particularly for a machine tool, with braced bearing arrangement, and method for mounting a motor spindle of this kind |
| CN113102786A (en) * | 2021-05-06 | 2021-07-13 | 广东工业大学 | Rotary ultrasonic machining main shaft |
| CN113458429A (en) * | 2021-07-19 | 2021-10-01 | 长春工业大学 | Axial bidirectional vibration electric spindle |
| CN113477954A (en) * | 2021-07-07 | 2021-10-08 | 珠海格力电器股份有限公司 | Automatic tool changing motorized spindle and machine tool |
| CN114505508A (en) * | 2022-03-07 | 2022-05-17 | 深圳己道科技有限公司 | Inner-cooling ultrasonic knife handle |
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| CN113102786A (en) * | 2021-05-06 | 2021-07-13 | 广东工业大学 | Rotary ultrasonic machining main shaft |
| CN113477954A (en) * | 2021-07-07 | 2021-10-08 | 珠海格力电器股份有限公司 | Automatic tool changing motorized spindle and machine tool |
| CN113458429A (en) * | 2021-07-19 | 2021-10-01 | 长春工业大学 | Axial bidirectional vibration electric spindle |
| CN113458429B (en) * | 2021-07-19 | 2023-09-08 | 长春工业大学 | Axial bidirectional vibration electric spindle |
| CN114505508A (en) * | 2022-03-07 | 2022-05-17 | 深圳己道科技有限公司 | Inner-cooling ultrasonic knife handle |
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