CN106475581B - The device and method that a kind of hydraulic radial loading of main shaft bearing outer ring inhibits vibration - Google Patents
The device and method that a kind of hydraulic radial loading of main shaft bearing outer ring inhibits vibration Download PDFInfo
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- CN106475581B CN106475581B CN201610859326.9A CN201610859326A CN106475581B CN 106475581 B CN106475581 B CN 106475581B CN 201610859326 A CN201610859326 A CN 201610859326A CN 106475581 B CN106475581 B CN 106475581B
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- main shaft
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- spindle
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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
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
-
- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/12—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring vibration
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The device and method that a kind of main shaft bearing outer ring of the invention hydraulic radial loading inhibits vibration apply front-end of spindle bearing outer ring uniformly distributed active force, improve rigidity and the damping of main shaft, and then reduce the vibration of front-end of spindle.Described device includes spindle vibration monitoring device, controller and hydraulic regulating device；Spindle vibration monitoring device is used to measure and handle the vibration signal of main shaft；The output terminal of the input terminal connection spindle vibration monitoring device of controller, for exporting control voltage signal to hydraulic regulating device according to the vibration signal received；Hydraulic regulating device includes the bearing block with annular groove mounted on front-end of spindle bearing periphery；The main shaft housing of the annular hydraulic oil pocket of closing is formed mounted on bearing block periphery and with the annular groove on bearing block；It is connected to the power amplifier and electrohydraulic servo valve of controller output end in turn；Electrohydraulic servo valve is connected with annular hydraulic fluid intracavitary portion.
Description
Technical field
The invention belongs to lathe intelligence main shaft fields, are related to vibration monitoring and the inhibition of process, specially a kind of master
The device and method that the hydraulic radial loading of axle bearing outer ring inhibits vibration.
Background technology
In numerically-controlled machine tool process, the requirement of suface processing quality and processing efficiency for workpiece is higher and higher.
In process, due to interacting between main shaft manufacture and the amount of unbalance of assembling process generation or cutter and workpiece
The influence of the factors such as the flutter of initiation so that there may be larger vibrations in process for machine tool chief axis.Front-end of spindle mistake
On the one hand big vibration can influence the suface processing quality and processing efficiency of workpiece, on the other hand can also accelerate the abrasion of cutter,
Influence the service life of machine tool component, it is therefore necessary to the Vibration Condition of machine tool chief axis is monitored, and adopts in real time online
Certain control method is taken to reduce its vibration, ensures processing quality.
Mainly have currently for the vibration suppressing method of machine tool chief axis：Flutter region is avoided by changing Machine-settings
Inhibit vibration, such as change rotating speed, cutting depth or the feed rate of main shaft；Change damping of axis system etc. to change master
Axis performance so as to fulfill the inhibition to vibration, is uniformly distributed including piezoelectric actuator or magnetostriction materials and is supported on master
The inhibition of vibration is realized in axis front end by controlling the size being used as power.
In above-mentioned inhibition method for oscillating, former is pressed down mainly for the chatter phenomenon generated in cutting process
System, it is impossible to eliminate the vibration of other forms.Latter has preferable general using the method that start material carries out vibration suppression
Property, but the Vibration Suppression System form and method being currently known be again there are the shortcomings of complicated, difficult to install, poor reliability,
Therefore this patent inhibits the vibration of front-end of spindle using hydraulic pressure, and main axle structure is simple, and reliability is high.
Invention content
For problems of the prior art, the present invention provides a kind of loading of main shaft bearing outer ring hydraulic radial and inhibits to shake
Dynamic device and method apply front-end of spindle bearing outer ring uniformly distributed active force, improve rigidity and the damping of main shaft, and then reduce
The vibration of front-end of spindle.
The present invention is to be achieved through the following technical solutions：
A kind of hydraulic radial loading of main shaft bearing outer ring inhibits the device of vibration, including spindle vibration monitoring device, control
Device and hydraulic regulating device；
The spindle vibration monitoring device is used to measure and handle the vibration signal of main shaft；
The output terminal of the input terminal connection spindle vibration monitoring device of the controller, for according to the vibration letter received
Number output control voltage signal is to hydraulic regulating device；
The hydraulic regulating device includes the bearing block with annular groove mounted on front-end of spindle bearing periphery；Installation
Bearing block periphery and on bearing block annular groove formed closing annular hydraulic oil pocket main shaft housing；It is connected to control in turn
The power amplifier and electrohydraulic servo valve of device output terminal processed；Electrohydraulic servo valve is connected with annular hydraulic fluid intracavitary portion.
Preferably, spindle vibration monitoring device includes for measuring the piezoelectricity of spindle vibration amplitude adding mounted on front-end of spindle
Velocity sensor and the data collecting system for handling the vibration signal of piezoelectric acceleration sensor acquisition；Data collecting system
Input terminal connection piezoelectric acceleration sensor, output terminal connect controller input terminal.
Preferably, the annular hydraulic oil pocket is radially evenly distributed.
Preferably, the oil inlet passage penetrated through with annular hydraulic oil pocket is offered in the main shaft housing, is set on oil inlet passage
There is oil inlet.
Preferably, the input terminal connection oil supply system of electrohydraulic servo valve.
Preferably, piezoelectric acceleration sensor is mounted in main shaft housing close to one end of front-end of spindle bearing.
The method that a kind of hydraulic radial loading of main shaft bearing outer ring inhibits vibration inhibits what is vibrated by of the present invention
Device loads main shaft bearing outer ring, includes the following steps,
(1) in process, the spindle vibration analog signal that the piezoelectric acceleration sensor of front-end of spindle will measure；
(2) vibration simulation signal obtains vibration signal through data collecting system, then be input in controller handle it is defeated
Go out the step of controlling voltage；The vibration signal exported in controller through data collecting system obtains the standard deviation ratio of vibration signal
SR, when standard deviation is than being more than the threshold value of vibration signal in the case of current processing, controller passes through PID (proportional-integral-differential)
Adjust output control voltage；
(3) output control spool of the voltage by power amplifier control electrohydraulic servo valve, and then control annular hydraulic fluid
In chamber the step of the pressure of hydraulic oil；
(4) main shaft is transferred the pressure to by bearing block, improves main axis stiffness and damping so as to reduce front-end of spindle vibration
The step of.
Preferably, the standard deviation of vibration signal is used for reflecting that than SR the instantaneous amplitude of vibration signal vibrates width relative to ideal
The growth pattern of value；The standard deviation of vibration signal is obtained than SR by following formula,
Wherein, σ is the instantaneous standard deviation that current vibration signal sampling small sample calculates；
σiThe standard deviation sampled for ith under preferable vibrational state；
N is the sampling number under preferable vibrational state.
Compared with prior art, the present invention has technique effect beneficial below：
The device and method that a kind of main shaft bearing outer ring of the invention hydraulic radial loading inhibits vibration, in process,
Well-distributed pressure is applied to main shaft bearing outer ring by hydraulic system, the property of main shaft can be preferably improved according to different demands
Can, realize the purpose for reducing spindle vibration；The principle and method of hydraulic regulating system are more mature, regulate and control in the vibration of main shaft
It is simpler and stable in journey；It does not need to carry out axis system larger change in structure and assembling is simple.
Description of the drawings
Fig. 1 is the principle schematic diagram of device of the present invention.
Fig. 2 is the flow chart of the method for the invention.
In figure：1 is main shaft, and 2 be front-end of spindle bearing, and 3 be main shaft housing, and 4 be hydraulic fluid chamber, and 5 be oil inlet, and 6 be axis
Bearing, 7 be piezoelectric acceleration sensor, and 8 be data collecting system, and 9 devices in order to control, 10 be power amplifier, and 11 watch to be electro-hydraulic
Valve is taken, 12 be oil supply system.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of main shaft bearing outer ring of the invention hydraulic radial loading inhibits the device of vibration, monitors and fills including spindle vibration
It puts, controller and hydraulic regulating device；The spindle vibration monitoring device is used to measure spindle vibration amplitude；The controller
For the spindle vibration signal got according to the monitoring portion, output control letter voltage number；The hydraulic regulating device is used for
Receive the control voltage signal of controller output, and pass through the spool of power amplifier control electrohydraulic servo valve, so control into
Pressure at hydraulic fluid chamber applies well-distributed pressure to front-end of spindle bearing outer ring eventually by the bearing block with annular groove and improves
Main axis stiffness and damping simultaneously reduce spindle vibration.
Specifically, as shown in Figure 1, a kind of main shaft bearing outer ring of the invention hydraulic radial loading inhibits the device of vibration to include
Spindle vibration monitoring device, controller 9 and hydraulic regulating device；
Spindle vibration monitoring device include piezoelectric acceleration sensor 7, for handle piezoelectric acceleration sensor acquisition
The data collecting system 8 of vibration signal, wherein, main shaft of the piezoelectric acceleration sensor 7 near end bearing 2 before main shaft 1
On housing 3, for acquiring the real-time vibration amplitude of main shaft 1；Data collecting system 8 can be to 1 vibration amplitude signal of main shaft simultaneously
Processing in real time, and be input in controller 9.
Controller 9 is used for 1 vibration signal of main shaft obtained according to data collecting system 8, output control voltage signal to liquid
Press regulation device；
Hydraulic regulating device includes the bearing block 6 with annular groove mounted on 2 periphery of end bearing before main shaft 1；It is mounted on
6 periphery of bearing block and the main shaft housing 3 that the hydraulic fluid chamber 4 closed is formed with the annular groove on bearing block 6；Bearing block 6 and bearing 2
Outer ring small―gap suture cooperation assembling；The power amplifier 10 being connect with 9 output terminal of controller；It is connect with power amplifier 10 electro-hydraulic
It is communicated inside servo valve 11, the electrohydraulic servo valve 11 and the hydraulic fluid chamber 4.
Vibration suppressing method of the present invention, as shown in Fig. 2, in process, the piezoelectric acceleration of 1 front end of main shaft
The 1 vibration simulation signal of main shaft measured through data collecting system 8, is input in controller 9 and is handled, obtained by sensor 7
The standard deviation of vibration signal, for different processing situations, sets the threshold value of vibration signal in the case of different processing, works as mark than SR
For quasi- difference than being more than threshold value, then controller adjusts output control voltage by PID, and electro-hydraulic watch is controlled finally by power amplifier 10
The spool of valve 11 is taken, and then is controlled into the pressure at hydraulic fluid chamber 4, since the oil inlet 5 is communicated with hydraulic fluid chamber 4, is pressed
Power oil can be acted on bearing block 6, and the vibration of main shaft 1 is inhibited by bearing block 6.In addition, electrohydraulic servo valve 11, hydraulic oil
Chamber 4 is connected with oil supply system 12, forming circuit.
Wherein, the standard deviation of vibration signal is used for reflecting the instantaneous amplitude of vibration signal relative to preferable vibration amplitude than SR
Growth pattern；The standard deviation of vibration signal is obtained than SR by following formula,
Wherein, σ is the instantaneous standard deviation that current vibration signal sampling small sample calculates；
σiThe standard deviation sampled for ith under preferable vibrational state；
N is the sampling number under preferable vibrational state.
Claims (5)
1. the method that a kind of hydraulic radial loading in main shaft bearing outer ring inhibits vibration, which is characterized in that pass through main shaft bearing outer ring
Hydraulic radial loading inhibits the device of vibration, and main shaft bearing outer ring is radially loaded；
The loading of main shaft bearing outer ring hydraulic radial inhibit the device of vibration include spindle vibration monitoring device, controller and
Hydraulic regulating device；
The spindle vibration monitoring device is used to measure and handle the vibration signal of main shaft；Spindle vibration monitoring device includes peace
It is used to measure the piezoelectric acceleration sensor (7) of main shaft (1) vibration amplitude mounted in main shaft (1) front end and accelerates for handling piezoelectricity
Spend the data collecting system (8) of the vibration signal of sensor acquisition；The input terminal connection piezoelectric acceleration of data collecting system (8)
Sensor (7), the input terminal of output terminal connection controller (9)；
The controller (9) is for according to the vibration signal output control voltage signal received to hydraulic regulating device；
The hydraulic regulating device includes the bearing block (6) with annular groove mounted on front-end of spindle bearing (2) periphery；Peace
The main shaft housing of the annular hydraulic oil pocket (4) of closing is formed mounted in bearing block (6) periphery and with the annular groove on bearing block (6)
(3)；It is connected to the power amplifier (10) of controller (9) output terminal and electrohydraulic servo valve (11) in turn；Electrohydraulic servo valve (11)
With being connected inside annular hydraulic oil pocket (4)；
It is described inhibit vibration method include the following steps,
(1) in process, the piezoelectric acceleration sensor (7) of main shaft (1) front end believes the main shaft measured (1) vibration simulation
Number；
(2) vibration simulation signal obtains vibration signal through data collecting system (8), then is input in controller (9) and is handled
Output control voltage；The vibration signal exported in controller (9) through data collecting system (8) obtains the standard deviation ratio of vibration signal
SR, when standard deviation is than being more than the threshold value of vibration signal in the case of current processing, controller (9) passes through proportional-integral-differential tune
Section output control voltage；
(3) output control voltage controls the spool of electrohydraulic servo valve (11) by power amplifier (10), and then controls annular liquid
The pressure of hydraulic oil in pumping cavity (4)；
(4) main shaft (1) is transferred the pressure to by bearing block (6), improves main shaft (1) rigidity and damping so as to reduce main shaft (1)
Front-end vibration；
Wherein, the standard deviation of vibration signal is used for reflecting the instantaneous amplitude of vibration signal relative to the increasing of preferable vibration amplitude than SR
Long situation；The standard deviation of vibration signal is obtained than SR by following formula,
Wherein, σ is the instantaneous standard deviation that current vibration signal sampling small sample calculates；
σiThe standard deviation sampled for ith under preferable vibrational state；
N is the sampling number under preferable vibrational state.
2. the method that hydraulic radial loading in a kind of main shaft bearing outer ring according to claim 1 inhibits vibration, feature exist
In the annular hydraulic oil pocket (4) is radially evenly distributed.
3. the method that hydraulic radial loading in a kind of main shaft bearing outer ring according to claim 1 inhibits vibration, feature exist
In offering the oil inlet passage penetrated through with annular hydraulic oil pocket (4) on the main shaft housing (3), oil inlet passage is equipped with oil inlet
Mouth (5).
4. the method that hydraulic radial loading in a kind of main shaft bearing outer ring according to claim 1 inhibits vibration, feature exist
In the input terminal connection oil supply system (12) of electrohydraulic servo valve (11).
5. the method that hydraulic radial loading in a kind of main shaft bearing outer ring according to claim 1 inhibits vibration, feature exist
In piezoelectric acceleration sensor (7) is in main shaft housing (3) close to one end of front-end of spindle bearing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859326.9A CN106475581B (en) | 2016-09-28 | 2016-09-28 | The device and method that a kind of hydraulic radial loading of main shaft bearing outer ring inhibits vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859326.9A CN106475581B (en) | 2016-09-28 | 2016-09-28 | The device and method that a kind of hydraulic radial loading of main shaft bearing outer ring inhibits vibration |
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| Publication Number | Publication Date |
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| CN106475581A CN106475581A (en) | 2017-03-08 |
| CN106475581B true CN106475581B (en) | 2018-06-26 |
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| CN108581623A (en) * | 2018-07-28 | 2018-09-28 | 重庆宏钢数控机床有限公司 | Convex block detachable outer protective cover lathe |
| CN114326373B (en) * | 2021-11-29 | 2024-08-02 | 青岛海德马克智能装备有限公司 | Compensation control method, system and equipment |
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| CN2858136Y (en) * | 2006-02-10 | 2007-01-17 | 东南大学 | Pre-fastening force controllable flutter-without electric principal axis |
| CN101920470A (en) * | 2010-08-02 | 2010-12-22 | 西安交通大学 | Integrated monitoring ring device of machine tool spindle |
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| CN103267637A (en) * | 2013-05-10 | 2013-08-28 | 西安交通大学 | Self-balancing motorized spindle comprehensive performance test platform |
| CN104985201A (en) * | 2015-07-22 | 2015-10-21 | 西安交通大学 | Programmable intelligent electric spindle |
| CN105750570A (en) * | 2016-04-13 | 2016-07-13 | 西安交通大学 | Active control method and system for milling chattering time delay of motorized spindle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63123602A (en) * | 1986-11-14 | 1988-05-27 | Mitsubishi Heavy Ind Ltd | Device for preventing vibration of main spindle |
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2016
- 2016-09-28 CN CN201610859326.9A patent/CN106475581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2858136Y (en) * | 2006-02-10 | 2007-01-17 | 东南大学 | Pre-fastening force controllable flutter-without electric principal axis |
| CN101920470A (en) * | 2010-08-02 | 2010-12-22 | 西安交通大学 | Integrated monitoring ring device of machine tool spindle |
| CN102310203A (en) * | 2011-06-20 | 2012-01-11 | 西安交通大学 | High-speed main shaft with controllable non-uniformly distributed pre-tightening force and control method thereof based on regulation and control of hydraulic system |
| CN103267637A (en) * | 2013-05-10 | 2013-08-28 | 西安交通大学 | Self-balancing motorized spindle comprehensive performance test platform |
| CN104985201A (en) * | 2015-07-22 | 2015-10-21 | 西安交通大学 | Programmable intelligent electric spindle |
| CN105750570A (en) * | 2016-04-13 | 2016-07-13 | 西安交通大学 | Active control method and system for milling chattering time delay of motorized spindle |
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