CN110153781A - Thin-wall part processing equipment for inhibiting of vibration and method based on flexure type actuator - Google Patents
Thin-wall part processing equipment for inhibiting of vibration and method based on flexure type actuator Download PDFInfo
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- CN110153781A CN110153781A CN201910436936.1A CN201910436936A CN110153781A CN 110153781 A CN110153781 A CN 110153781A CN 201910436936 A CN201910436936 A CN 201910436936A CN 110153781 A CN110153781 A CN 110153781A
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- thin
- vibration
- control
- type actuator
- flexure type
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
-
- 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
- B23Q11/0039—Arrangements for preventing or isolating vibrations in parts of the machine by changing the natural frequency of the system or by continuously changing the frequency of the force which causes the vibration
-
- 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)
- Auxiliary Devices For Machine Tools (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
It include vibration detecting unit, signal acquisition unit, power amplification unit, control computer, programmable signal generator, flexure type actuator the invention discloses a kind of thin-wall part milling parameter active control device；The flexure type actuator is used to apply reversed vibration suppression power to thin-wall workpiece, carries out active control to the Regenerative Chatter of milling process；The invention also discloses the Method of Active Vibration Control for being directed to the vibration-repressing device.The present invention can realize the real-time detection and feedback control of the vibration in thin-wall part milling process with higher precision, fast response time, High power output and accurate, it is also equipped with small in size, small power consumption, the advantages that unit volume strain energy is big, adapts to the complexity and time variation of the narrow processing space of complicated shape thin-wall part and complicated shape thin-wall part process tool-workpiece system dynamic characteristic.
Description
Technical field
The invention belongs to machine field, and in particular to a kind of thin-wall part processing vibration suppression based on flexure type actuator
Device and method.
Background technique
Thin-walled parts have many advantages, such as that light weight, specific strength are high, are widely used to aerospace, automobile, the energy at present
Etc. numerous fields.Especially in aerospace field, energy consumption will be reduced and promotes aircraft overall performance by mitigating architecture quality.
Therefore it designs and manufactures and meet the high quality thin-wall part of performance requirement and have very important significance.Typical aviation thin-walled zero
Part mainly has integral blade disk, assembling leaf dish, casing, rib, flap-track, crossbeam, siding etc..
Thin-walled parts belong to weak rigid element, and processing difficulties essentially consist in easily to be vibrated under cutting force effect, special
It is not that oscillation phenomenon becomes apparent, flutter even occurs under big cutting parameter.The presence of oscillation phenomenon not only compromises lathe
With cutter life, limit processing efficiency, also reduce workpiece surface processing quality, this will seriously reduce production efficiency, reduce
The precision of finished product improves production cost.Therefore, active control is carried out to the vibration in thin-wall part process by certain method
It has a very important significance.
There are two types of main methods to solve the problems, such as that thin-wall part processes vibration control so far, i.e., passive and active control side
Method.Passive material is mounted in structure to change the parts dynamic characteristic such as rigidity and damped coefficient by passive control, but it increases
Add the complexity of structure, and damping property is poor, flexibility ratio is low, is unable to satisfy processing request complicated and changeable.In recent years
With the rapid development of intellectual material, ER fluid, piezoelectric ceramics, electromagnetic actuators etc. are applied to active vibration control and work as
In, achieve preferable effect.For example, Li little Hu et al. is (referring to patent " based on prediction-self adaptive control milling electro spindle
Vibration Suppression System and method -201810092078.9 ") use electromagnetic actuators to vibrate progress active control to milling spindle,
This method output action power and displacement are big, but it is not high to control precision, it is difficult to adapt to aircraft parts high-precision requirement；Pan.G
Et al. by magnetic deformation actuator be applied to the vibration control of turning extension rod (referring to " Modeling and intellligent
chatter control strategies for a lathe machine.Control Engineering Practice,
1996,4 (12): 1647~1658 "), this Active Control Method fast response time, displacement, power are larger, and fragile material is easy to break
It is disconnected, it is only capable of single load bearing.
Chen Puwei et al. carries out active control (referring to " Research to Thin-walled Workpiece milling parameter using voice coil motor
on Active Vibration Control of Thin-walled Workpiece in Milling Based on
Voice Coil Motor "), this control method fast response time, precision is high, and it is highly reliable, but actuator volume is big, spirit
Poor activity, it is difficult to adapt to the narrow processing space of complicated core aviation thin-walled parts (such as turbine blisk, impeller), be difficult to answer
In actual production.Therefore, seek that a kind of fast response time, precision height, good reliability, to adapt to complicated core aviation thin
The Method of Active Vibration Control of the narrow processing space of wall part needs.
Active control responds according to system and control algolithm appropriate is combined to inhibit processing vibration, and main process is that basis exists
Line measures Relative Vibration or cutting force size between cutter and workpiece, and compensation is generated using intelligent actuators or offsets vibration
Power.Sensor and intelligent actuators form a closed loop and facilitate controller design, by rationally changing system dynamic characteristic, actively
The stability of thin-wall part Milling Process system can be improved in control method, to improve processing efficiency.
Summary of the invention
Technical problems to be solved:
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of thin-wall part processing based on flexure type actuator
Equipment for inhibiting of vibration and method, by changing actuator both end voltage, apply workpiece anti-using flexure type actuator as actuator
To active force, thin-wall workpiece flutter is inhibited with this.The present apparatus has many advantages, such as that fast response time, power output are accurate, small in size, energy
Enough adapt to the narrow processing characteristic of typical airline thin-wall part (integral blade disk, impeller) processing space.
The technical scheme is that a kind of thin-wall part based on flexure type actuator processes equipment for inhibiting of vibration, it is special
Sign is: occurring including vibration detecting unit, signal acquisition unit, power amplification unit, control computer, programmable signal
Device, flexure type actuator and fixture；
The vibration detecting unit is connect with thin-wall workpiece, the vibration generated in Milling Processes for monitoring workpiece
Signal, and obtain corresponding monitoring voltage signal；It will test voltage signal and the control be transferred to by the signal acquisition unit
Computer processed；The programmable signal generator is used for by the driving signal of the control computer control output real-time change
The flexure type actuator is driven, changes the bending degree of flexure type actuator by changing driving voltage, further to thin-walled
Workpiece applies corresponding vibration suppression power；The power amplifier is connect with programmable signal generator, described curved for amplifying driving
The voltage of curved actuator；
The fixture is used for the location and installation of thin-wall workpiece and the flexure type actuator, by the fixture by flexure type
The non-processing side surface of thin-wall workpiece is fixed in actuator attaching, guarantees that the active force of flexure type actuator free end is applied to thin-walled
At Workpiece vibration amplitude maximum.
A further technical solution of the present invention is: the flexure type actuator is piezoelectric bimorph, by described
Piezoelectric bimorph applies voltage, and free end can be bent generation displacement.
A further technical solution of the present invention is: the fixture includes U-shaped pedestal, fixture block and positioning bolt；The fixture block
It is set between the both ends side wall of the U-shaped pedestal, one end side wall that the positioning bolt passes through the U-shaped pedestal connects with fixture block
Touching, by tighten the positioning bolt by thin-wall workpiece and the flexure type actuator be fixed on the U-shaped pedestal and fixture block it
Between.
A further technical solution of the present invention is: the vibrating sensor of the vibration detecting unit is attached at thin-wall workpiece table
Face.
A kind of thin-wall part milling vibration is provided for the thin-wall part processing equipment for inhibiting of vibration based on flexure type actuator
Dynamic Active Control Method, it is characterised in that steps are as follows:
Step 1: before processing, the vibration shape of thin-wall workpiece is determined by finite element analysis or mode experiment；By described
Fixture clamping thin-wall workpiece and the bend actuator make bend actuator attaching be fixed on the non-processing side surface of thin-wall workpiece,
Guarantee that the free end active force of the bend actuator is applied to thin-wall workpiece vibration amplitude and reaches at extreme value；By vibration detection list
The vibrating sensor of member is attached at thin-wall workpiece surface for acquiring vibration signal；
Step 2: after machining starts, the vibrating sensor is acquired by the digital signal acquiring device and is obtained
Voltage signal, and be transmitted to the control computer；Application control algorithm calculates the driving voltage of output；
Step 3: the programmable signal generator output drive signal is controlled by the control computer, then by institute
State power amplifier by drive letter be enlarged into driving voltage, drive the bend actuator bending deformation, flexure actuator oneself
Reversed vibration suppression power is imposed to thin-wall workpiece by holding, to realize the vibration control of thin-wall workpiece milling.
A further technical solution of the present invention is: the control algolithm is the PID proportional-integral-differential in vibration control
Control, the control of PPF positive position feedback, LQG Linear quadratic Gaussian control control algolithm.
Beneficial effect
The beneficial effects of the present invention are:
1, the actuator using flexure type actuator as vibration-repressing device is easy to accurately control, fast response time, power output
Accurately.
2, flexure type actuator is small in size, and unit volume strain energy is big, and especially adaptation complicated shape thin-wall part is narrow adds
Work space.
3, the use small power consumption of flexure type actuator, and it is cheap, the additional production cost of bring is small.
4, flexure type actuator is easy for installation, is adapted to actual processing, will not bring additional clamping difficulty and fixture at
This.
5, the method according to the invention uses the device of the invention, can be realized the real-time detection and feedback control of vibration,
Precision height is controlled, the complexity and time-varying of complicated shape thin-wall part process tool-workpiece system dynamic characteristic are especially adapted to
Property.
6, the method according to the invention uses the device of the invention, can be realized the effective of thin-wall workpiece milling process flutter
Control to improve the precision and surface quality of product, while reducing cutter and lathe abrasion, reduces cost.
Detailed description of the invention
Fig. 1 is that the present invention is based on the operation schematic diagrams of the thin-wall part of bend actuator processing equipment for inhibiting of vibration；
Fig. 2 is the use step schematic diagram based on thin-wall part processing equipment for inhibiting of vibration；
Fig. 3 is the real-time closed-loop feedback structure schematic diagram；
Description of symbols: 1- fixture；2- power amplifier；3- programmable signal generator；4- controls computer；5- number
Word signal picker；6- vibration detecting unit；7- machine tool chief axis；8- milling cutter；9- thin-wall workpiece；10- bend actuator；A- thin-walled
Part processes side surface；The non-processing side surface of b- thin-walled parts.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to be used to explain the present invention, and cannot understand
For limitation of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
The present invention is curved with piezoelectric ceramics using Five-axis numerical control milling machine as process equipment by taking 3mm thickness Thin-wall Aluminum Parts as an example
Bent actuator is actuator, using acceleration transducer as vibration detecting unit, is added to illustrate that this is based on bend actuator thin-wall part
The step of work equipment for inhibiting of vibration and application method.
Step 1: Thin-wall Aluminum Parts to be processed are completed processing on numerically controlled machine by 1 clamping of fixture
Preceding calibration, to work such as knives；
Step 2: for the first time by the dynamic characteristic for determining thin-walled parts by finite element simulation or mode experiment.
Then by 1 clamping piezoelectric ceramic bending actuator 10 of fixture, bend actuator 10 is made to be attached at thin-wall workpiece non-
Side surface is processed, guarantees that actuator free end active force is applied to Workpiece vibration amplitude and reaches at extreme value.By vibration detecting unit 6
It is mounted on the corresponding position of the non-processing side b in thin-wall workpiece surface, the vibration generated in Milling Processes for monitoring workpiece
Dynamic signal, and obtain corresponding monitoring voltage signal；Vibration detecting unit 6 is calculated by digital signal acquiring unit 5 and control
Machine 4 connects；Programmable signal generator 3 is connect with control computer 4, and is connected by power amplifier 2 and bend actuator 10
It connects, for amplifying the voltage for driving the flexure type actuator；
It finally carries out the calibration of detection unit: before processing does not start, vibrating sensor being adjusted, guarantee is shaken at this time
Dynamic sensor initial detecting value is zero.Flexure type actuator 10 is demarcated, the determination between its power output and voltage is obtained
Relationship.
Step 3: starting to carry out machining, real-time monitoring is carried out to the flutter in milling process by vibrating sensor,
Voltage signal detected is transmitted to control computer through signal picker acquisition, and control programmable signal generator generates corresponding
Driving signal.
Step 4: the driving signal that programmable signal generator generates is enlarged into driving voltage through power amplifier, drive
Voltage, which acts on flexure type actuator, makes it generate bending deformation, applies reversed vibration suppression power to workpiece in actuator distal end, to thin
The flutter that wall pieces process generates carries out active control.
Test result shows that the thin-wall part processing equipment for inhibiting of vibration based on bend actuator can effectively inhibit thin-walled
The flutter that part process generates, the surface quality of the part finally processed are significantly improved.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (6)
1. a kind of thin-wall part based on flexure type actuator processes equipment for inhibiting of vibration, it is characterised in that: including vibration detection list
Member, signal acquisition unit, power amplification unit, control computer, programmable signal generator, flexure type actuator and fixture；
The vibration detecting unit is connect with thin-wall workpiece, the vibration letter generated in Milling Processes for monitoring workpiece
Number, and obtain corresponding monitoring voltage signal；It will test voltage signal and the control be transferred to by the signal acquisition unit
Computer；The programmable signal generator is exported the driving signal of real-time change by the control computer control, for driving
The flexure type actuator is moved, changes the bending degree of flexure type actuator by changing driving voltage, further to thin-walled work
Part applies corresponding vibration suppression power；The power amplifier is connect with programmable signal generator, drives the bending for amplifying
The voltage of type actuator；
The fixture is used for the location and installation of thin-wall workpiece and the flexure type actuator, is activated flexure type by the fixture
The non-processing side surface of thin-wall workpiece is fixed in device attaching, guarantees that the active force of flexure type actuator free end is applied to thin-wall workpiece
Vibration amplitude maximum.
2. the thin-wall part based on flexure type actuator processes equipment for inhibiting of vibration according to claim 1, it is characterised in that: institute
Stating flexure type actuator is piezoelectric bimorph, and by applying voltage to the piezoelectric bimorph, free end can
Bending generates displacement.
3. the thin-wall part based on flexure type actuator processes equipment for inhibiting of vibration according to claim 1, it is characterised in that: institute
Stating fixture includes U-shaped pedestal, fixture block and positioning bolt；The fixture block is set between the both ends side wall of the U-shaped pedestal, described
Positioning bolt pass through the U-shaped pedestal one end side wall contacted with fixture block, by tighten the positioning bolt by thin-wall workpiece with
The flexure type actuator is fixed between the U-shaped pedestal and fixture block.
4. the thin-wall part based on flexure type actuator processes equipment for inhibiting of vibration according to claim 1, it is characterised in that: institute
The vibrating sensor for stating vibration detecting unit is attached at thin-wall workpiece surface.
5. the control method of the thin-wall part processing equipment for inhibiting of vibration described in claim 1 based on flexure type actuator, feature
It is that steps are as follows:
Step 1: before processing, the vibration shape of thin-wall workpiece is determined by finite element analysis or mode experiment；Pass through the fixture
Clamping thin-wall workpiece and the bend actuator make bend actuator attaching be fixed on the non-processing side surface of thin-wall workpiece, guarantee
The free end active force of the bend actuator is applied to thin-wall workpiece vibration amplitude and reaches at extreme value；By vibration detecting unit
Vibrating sensor is attached at thin-wall workpiece surface for acquiring vibration signal；
Step 2: after machining starts, the vibrating sensor electricity obtained is acquired by the digital signal acquiring device
Signal is pressed, and is transmitted to the control computer；Application control algorithm calculates the driving voltage of output；
Step 3: the programmable signal generator output drive signal is controlled by the control computer, then by the function
Rate amplifier will drive letter to be enlarged into driving voltage, the bend actuator bending deformation be driven, in flexure actuator free end
Reversed vibration suppression power is imposed to thin-wall workpiece, to realize the vibration control of thin-wall workpiece milling.
6. control method according to claim 5, it is characterised in that: the control algolithm is the PID ratio-in vibration control
Integrated Derivative control, the control of PPF positive position feedback, LQG Linear quadratic Gaussian control control algolithm.
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| CN201910436936.1A CN110153781B (en) | 2019-05-24 | 2019-05-24 | Thin-wall part machining vibration suppression device and method based on bending actuator |
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| CN201910436936.1A CN110153781B (en) | 2019-05-24 | 2019-05-24 | Thin-wall part machining vibration suppression device and method based on bending actuator |
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| CN110153781B CN110153781B (en) | 2020-11-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614538A (en) * | 2019-09-17 | 2019-12-27 | 西北工业大学 | Thin-wall part machining acceleration field construction method based on single-point acceleration monitoring |
| CN111203751A (en) * | 2020-02-12 | 2020-05-29 | 宜宾职业技术学院 | Vibration identification detection machining platform and machining process for numerical control machining thin-walled workpiece |
| CN111360303A (en) * | 2020-03-24 | 2020-07-03 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Curved surface thin-wall part milling monitoring device and application system thereof |
| CN112872851A (en) * | 2021-01-06 | 2021-06-01 | 西北工业大学 | Auxiliary supporting vibration suppression device for milling of thin-wall curved surface part |
| CN112935865A (en) * | 2021-01-29 | 2021-06-11 | 华中科技大学 | Method for improving thin-wall part processing stability and supporting device |
| CN113156885A (en) * | 2021-02-26 | 2021-07-23 | 西安交通大学 | Electric spindle milling flutter regulation and control method and device based on self-adaptive fuzzy reasoning |
| CN117075535A (en) * | 2023-10-16 | 2023-11-17 | 上海诺倬力机电科技有限公司 | Vibration suppressing method, vibration suppressing device, electronic apparatus, and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110614538A (en) * | 2019-09-17 | 2019-12-27 | 西北工业大学 | Thin-wall part machining acceleration field construction method based on single-point acceleration monitoring |
| CN110614538B (en) * | 2019-09-17 | 2021-04-20 | 西北工业大学 | Thin-wall part machining acceleration field construction method based on single-point acceleration monitoring |
| CN111203751A (en) * | 2020-02-12 | 2020-05-29 | 宜宾职业技术学院 | Vibration identification detection machining platform and machining process for numerical control machining thin-walled workpiece |
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| CN111360303A (en) * | 2020-03-24 | 2020-07-03 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Curved surface thin-wall part milling monitoring device and application system thereof |
| CN112872851A (en) * | 2021-01-06 | 2021-06-01 | 西北工业大学 | Auxiliary supporting vibration suppression device for milling of thin-wall curved surface part |
| CN112935865A (en) * | 2021-01-29 | 2021-06-11 | 华中科技大学 | Method for improving thin-wall part processing stability and supporting device |
| CN113156885A (en) * | 2021-02-26 | 2021-07-23 | 西安交通大学 | Electric spindle milling flutter regulation and control method and device based on self-adaptive fuzzy reasoning |
| CN113156885B (en) * | 2021-02-26 | 2023-04-14 | 西安交通大学 | Electric spindle milling flutter regulation and control method and device based on self-adaptive fuzzy reasoning |
| CN117075535A (en) * | 2023-10-16 | 2023-11-17 | 上海诺倬力机电科技有限公司 | Vibration suppressing method, vibration suppressing device, electronic apparatus, and readable storage medium |
| CN117075535B (en) * | 2023-10-16 | 2024-01-02 | 上海诺倬力机电科技有限公司 | Vibration suppressing method, vibration suppressing device, electronic apparatus, and readable storage medium |
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