CN105108583B - Based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method - Google Patents
Based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method Download PDFInfo
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- CN105108583B CN105108583B CN201510287482.8A CN201510287482A CN105108583B CN 105108583 B CN105108583 B CN 105108583B CN 201510287482 A CN201510287482 A CN 201510287482A CN 105108583 B CN105108583 B CN 105108583B
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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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0966—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring a force on parts of the machine other than a motor
Abstract
Vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method are based on the present invention relates to one kind.The sensor of measurement dynamic milling force is typically mounted between main shaft and cutter at present, and excessive axial force, moment of flexure are born when using, while these rotation dynamometers are complicated, had larger additional mass to axis system, is reduced the rigidity of axis system.Present invention composition includes：Milling device（16）, described milling device includes main shaft（5）, described main shaft side face has passes through magnetic force and dynamic milling force measuring device in plane, described plane（6）Connection, the other end of described dynamic milling force measuring device is provided with current vortex sensor（8）, described current vortex sensor front end face and knife bar（4）Outer surface laminating, described current vortex sensor rear end and computer（7）Electrical connection.The present invention is used to be based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus.
Description
Technical field：
Vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method are based on the present invention relates to one kind.
Background technology：
The sensor of measurement dynamic milling force is typically mounted between main shaft and cutter at present, and excessive axle is born when using
Xiang Li, moment of flexure, while these rotation dynamometers are complicated, have larger additional mass to axis system, reduce main shaft system
The rigidity of system.
Vehicle exterior cladding element mould volume compared with common diel is larger, complex-shaped, and its manufacture difficulty is big, processing
Quality and required precision are very high, and punch and matrix part-structure is complicated, exist again on free form face substantial amounts of such as groove, corner,
Raised, depression etc. includes the type face of curvature.In complex-curved region, due to the complexity of milling characteristic, the serious shadow of dynamic milling force
Ring the crudy of workpiece and make the increase of its processing cost, it can be seen that, for dynamic milling force in large mold process
Measurement tool be of great significance.
For the dynamic milling force measurement of vehicle exterior cladding element mould, the contact area between dynamometer and mould is limited to,
Dynamometer can only measure the dynamic cutting force of smaller mould, while dynamometer also exists to overload sensitive, needs special auxiliary to fill
Put, its dynamic characteristic can change with the change of die quality, these reasons all restrict dynamic with measurement large mold
State Milling Force.At present, the moment of torsion force snesor used is typically mounted between main shaft and cutter, needs to avoid bearing when using
Big axial force, moment of flexure, in order to avoid the use of influence torque sensor, these rotation dynamometers are complicated, have to axis system
Larger additional mass, and for cantilever type structure, reduce further the rigidity of axis system, accordingly, it would be desirable to one it is simple,
Radial vibration displacement inexpensive, by measuring rotary milling tools knife bar during Milling Process is moved, and measures dynamic milling force indirectly
Method.
During machining, along with the state of high-speed rotating machine and reciprocating machinery, ground in vibration
Study carefully, in analysis measurement, for non-contacting high accuracy vibration, displacement signal, it would be desirable to can continuously collect knife exactly
Tool and many kinds of parameters of machine vibration state, and the state of current vortex sensor energy directly non-cpntact measurement rotating shaft, it is possible to provide close
The vibration information of key.And generally current vortex sensor is generally connected to beside main shaft by we by a certain attachment means
Non-contact detecting is carried out, but main shaft produces the work that serious vibration affects current vortex sensor when running at high speed, so, it is
Influence of the spindle vibration to measurement is solved, effectively current vortex sensor is integrated on main shaft, we are accomplished by an electricity
Eddy current sensor vibration isolation type supporting arrangement.
For existing dynamic milling force measuring method in processing workpiece size, quality, Measurement bandwidth and mounting means
In terms of limitation, this product proposes a kind of measuring system of utilization current vortex sensor vibration isolation type supporting arrangement, measures milling
The radial vibration displacement of rotary milling tools knife bar when cutting processing, according to the relation between milling cutter vibration displacement and Milling Force, by shaking
The method that dynamic displacement determines dynamic milling force indirectly.And problem of dtmf distortion DTMF is measured to the Milling Force under milling cutter high-speed milling speed, enter
Mobile state is compensated, and is improved the bandwidth of measuring system, is realized the accurate measurement of dynamic milling force.
The content of the invention：
Vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measurement are based on it is an object of the invention to provide one kind
Method.
Above-mentioned purpose is realized by following technical scheme：
One kind is based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, and its composition includes：Milling device, it is described
Milling device include main shaft, described main shaft side face has in plane, described plane to be surveyed by magnetic force and dynamic milling force
Device connection is measured, the other end of described dynamic milling force measuring device is provided with current vortex sensor, and described current vortex is passed
Sensor front end face is fitted with the outer surface of knife bar, and described current vortex sensor rear end is with calculating mechatronics.
It is described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described dynamic milling force measurement dress
Put including vibration damping sliding bar, magnet base, locking sliding equipment A is installed on described vibration damping sliding bar front plan, it is described
Locking sliding equipment A sides are installed with screw rod knob A and also cross described vibration damping sliding bar, and described vibration damping sliding bar is interior to be had
Have and damping block is installed in hole, described hole, damping fluid, described damping block are housed between described hole and described damping block
End face, which is provided with, is provided with described current vortex sensor in packing ring, described locking sliding equipment A.
It is described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described vibration damping sliding bar is through lock
Collar, described clamp ring is fixed with locking sliding equipment B, be respectively provided with described locking sliding equipment B screw rod knob B,
It is cased with being installed with screw rod knob C simultaneously in locking sliding equipment C, described locking sliding equipment C outside sliding bar, described sliding bar
Also cross connecting bracket.
It is described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, there is cone inside described magnet base
Connected in star, described conical socket is built with taper clamp system, and described taper clamping is in-house to be equipped with taper compact heap,
Described taper clamp system bottom surface is separately installed with above dividing plate heelpiece, bulkhead sides pad, described magnet base with two sides
It is connected by bolt with overhead gage, dividing plate pad, described overhead gage is installed between described magnet base and described overhead gage
Middle part is connected by screw thread with described connecting bracket, and pulvinulus is housed between described connecting bracket and described overhead gage
Circle, described magnet base side is provided with adjustment button.
It is described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, pass through the conical surface below described main shaft
It is connected with described knife bar, described knife bar has milling cutter sword, described milling cutter sword is fitted with workpiece, described workpiece lower plane
Fixed with workbench.
One kind is based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method, and this method includes as follows
Step：It is by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, taper clamp system, sliding bar connecting bracket, taper pressure first
Tight block, it is put into successively inside magnetic stand, and by deep gouge screw in compression overhead gage and magnet base, sliding bar is passed through to lock and slided
Motivation structure is arranged in sliding bar connecting bracket；
Damping block, packing ring will be put into inside vibration damping sliding bar, and locked.It is arranged on and slides again by locking sliding equipment
On bar, by the cooperation of sliding bar and vibration damping sliding bar and retaining mechanism, allow its realize the elongation of space six degree of freedom with
Rotation, then puts current vortex sensor, and whole vibrating isolation system is fixed on into lathe by magnet base on vibration damping sliding bar
On main shaft, the vibration displacement that sliding bar and vibration damping sliding bar enable current vortex sensor accurately to measure knife bar is adjusted；
During measurement, current vortex sensor is first passed through, the vibration displacement of cutter bar of milling cutter during measurement Milling Process, afterwards according to survey
The static calibration result of amount system, the transitive relation between vibration displacement and Milling Force is recognized based on neutral net, thus, is led to
The vibration displacement for crossing cutter bar of milling cutter determines corresponding Milling Force, Milling Force measurement problem of dtmf distortion DTMF during for high-speed milling, passes through
Compensation tache enters Mobile state compensation to measuring system, and the finally measurement to dynamic milling force carries out experimental verification.
Beneficial effect：
1. the present invention is the device tested using vibration isolation type current vortex sensor dynamic milling force, mainly solve
Because vehicle exterior cladding element mould is too big, the problem of dynamometer is not installed, the dynamic milling force indirect measurement systems of this product
Dynamometer can be replaced completely, and the installation cost is low, and simple and practical, the precision of the dynamic milling force of measurement is higher, and dynamometer
The dynamic milling force measured is compared, and error only has 7%.
The measurement of dynamic milling force when the present invention is complex-curved to processing outer covering piece mould, and five-axle linkage processing
Prediction of dynamic milling force and milling process stability etc. during integral wheel, by dynamic milling force measurement and processing stability
Real-time estimate, can correct machined parameters, optimization tool feeding direction, can also control cutter, workpiece deformation, be that cutter is set
Meter, cutting tool wear and damage monitoring provide important reference value.
Current vortex sensor vibration isolation type supporting arrangement effectiveness in vibration suppression in present system is obvious so that cutter bar of milling cutter shakes
Dynamic displacement measurement is accurate, and vibration isolator, vibration isolation heelpiece, vibration isolation side pad are provided with inside the device of test, can be with during use
Play good vibration isolation effect.
Damper mechanism is provided with inside the vibration damping sliding bar of the present invention, by the cooperation with vibration isolator, vibration isolating effect ten is clearly demarcated
Aobvious, the device, can be according to actual conditions very easily adjusting position provided with sliding bar, locking sliding equipment.
Present system has multifunctionality, flutter can be predicted according to actual conditions, i.e., according to the reality of vibration cutting
Border situation predicts that flutter can occur for cutter as cutting-in constantly increases in flutter, milling process, the milling vibration at this moment obtained
Chaos phenomenon can occur for signal, and it is a kind of seemingly random that so-called chaos refers to occur in deterministic system, similar random
Phenomenon, can monitor the non-linear spy of vibration displacement signal in milling process using methods such as Lyaunov indexes and approximate entropies
Change is levied, flutter is predicted with this, the vibration displacement signal data of cutter bar of milling cutter is obtained by current vortex sensor, if vibration
The sample frequency of signal is 5000Hz, for signal every 1024 points（Time interval 0.2048 second）Maximum Lyapunov is carried out to refer to
Number and approximate entropy are calculated, and result of calculation corresponds to milling vibration signal.
The present invention is when milling is bred, when the dimension 2 that maximum Lyapunov exponent is embedded in, maximum Lyapunov exponent
Change greatly, more than 0.5 and have a mutation；The stage is bred in flutter and flutter produces the maximum Lyapunov exponent in stage and is more than steadily
Maximum Lyapunov exponent during milling, threshold value is about between 0.5-0.65.When steady cutting, milling vibration signal it is near
Like entropy numerical value 0.1 or so, once flutter is bred, flutter occurs approximate entropy numerical value and will increase between 0.4~0.6.
The present invention is carried out to the maximum Lyapunov exponent and Analysis of Approximate Entropy of vibration signal under identical working condition
Cross multigroup similar experimental study, very well, repetitive rate is up to more than 94%, if setting corresponding threshold value for the repeatability of experiment, can be with
Accurately determine whether system of processing there occurs flutter, therefore this product has multi-functional purposes.
Brief description of the drawings：
Accompanying drawing 1 is the structural representation of the present invention.
Accompanying drawing 2 is the enlarged drawing of A in accompanying drawing 1.
Accompanying drawing 3 is the dynamic milling force measuring device structural representation in accompanying drawing 1.
Accompanying drawing 4 is the A-A sectional views of accompanying drawing 3.
Accompanying drawing 5 is the B-B sectional views of accompanying drawing 3.
Accompanying drawing 6 is the exploded view of accompanying drawing 3.
Embodiment：
Embodiment 1：
One kind is based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, and milling device 16, described milling is set
Standby to include main shaft 5, described main shaft side face has passes through magnetic force and dynamic milling force measuring device 6 in plane, described plane
Connection, the other end of described dynamic milling force measuring device is provided with before current vortex sensor 8, described current vortex sensor
End face is fitted with the outer surface of knife bar 4, and described current vortex sensor rear end is electrically connected with computer 7.
Embodiment 2：
According to embodiment 1 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described dynamic
Milling force measuring device includes being provided with locking cunning on vibration damping sliding bar 12, magnet base 9, described vibration damping sliding bar front plan
Motivation structure A13, described locking sliding equipment A sides are installed with screw rod knob A27 and also cross described vibration damping sliding bar, institute
Have in the vibration damping sliding bar stated and damping block 18 is installed in hole, described hole, filled between described hole and described damping block
There is damping fluid 15, described damping block end face, which is provided with, is provided with described electric whirlpool in packing ring 17, described locking sliding equipment A
Flow sensor.
Embodiment 3：
According to embodiment 2 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described vibration damping
Sliding bar passes through clamp ring 11, and described clamp ring is fixed with locking sliding equipment B28, divided in described locking sliding equipment B
Not Zhuan You screw rod knob B14, sliding bar 10, locking sliding equipment C29 is cased with outside described sliding bar, described locking is slided
Screw rod knob C30 is installed with mechanism C and also cross connecting bracket 24.
Embodiment 4：
According to embodiment 3 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described magnetic force
Seat is internal to have conical socket, and described conical socket is built with taper clamp system 25, and described taper clamps in-house
Equipped with taper compact heap 23, described taper clamp system bottom surface is separately installed with dividing plate heelpiece 22, bulkhead sides with two sides
It is connected above pad 21, described magnet base by bolt with overhead gage 19, peace between described magnet base and described overhead gage
Equipped with dividing plate pad 20, described overhead gage middle part is connected by screw thread with described connecting bracket, described connecting bracket
Small washer 26 is housed between described overhead gage, described magnet base side is provided with adjustment button.
Embodiment 5：
According to embodiment 2 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described main shaft
Lower section is connected by the conical surface with described knife bar, and described knife bar has milling cutter sword 3, and described milling cutter sword is fitted with workpiece 2, institute
The workpiece lower plane stated is fixed with workbench 1.
Embodiment 6：
Described in a kind of utilization embodiment 1-5 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measurement
Method, this method is：It is by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, taper clamp system, sliding bar connection branch first
Frame, taper compact heap, it is put into successively inside magnetic stand, and by deep gouge screw in compression overhead gage and magnet base, by sliding bar
By locking sliding equipment in sliding bar connecting bracket；
Damping block, packing ring will be put into inside vibration damping sliding bar, and locked, be arranged on and slide again by locking sliding equipment
On bar, by the cooperation of sliding bar and vibration damping sliding bar and retaining mechanism, allow its realize the elongation of space six degree of freedom with
Rotation, then puts current vortex sensor, and whole vibrating isolation system is fixed on into lathe by magnet base on vibration damping sliding bar
On main shaft, the vibration displacement that sliding bar and vibration damping sliding bar enable current vortex sensor accurately to measure knife bar is adjusted；
During measurement, current vortex sensor is first passed through, the vibration displacement of cutter bar of milling cutter during measurement Milling Process, afterwards according to survey
The static calibration result of amount system, the transitive relation between vibration displacement and Milling Force is recognized based on neutral net, thus, is led to
The vibration displacement for crossing cutter bar of milling cutter determines corresponding Milling Force, Milling Force measurement problem of dtmf distortion DTMF during for high-speed milling, passes through
Compensation tache enters Mobile state compensation to measuring system, and the finally measurement to dynamic milling force carries out experimental verification.
Embodiment 7：
According to embodiment 1-6 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, dynamic milling
Power indirect measurement systems are first by current vortex sensor, the vibration displacement of cutter bar of milling cutter during measurement Milling Process, i.e., in milling
During processing workpiece, current vortex sensor is adsorbed beside main shaft by vibration isolation type supporting arrangement, and cutter bar of milling cutter is shaken
Dynamic displacement carries out non-contact measurement, by determining the transmission function of measuring system, and static calibration by measuring system and
Dynamic compensation etc., obtains dynamic milling force in mold pressing process.As shown in Figure 1.
It can be obtained, be so beneficial to recognize with neutral net for the transitive relation between vibration displacement and Milling Force
Dynamic milling force p and vibration displacement a non-linear relation are set up, so as to realize the measurement of dynamic milling force.The survey of the present invention
The neutral net that amount system is selected is three layers of BP networks, theoretically, as long as training sample is enough, and three layers of BP networks can be with
Arbitrary accuracy approaches any one real system.Input vector a is tri- sides of X, Y, Z under a certain rotating speed of milling cutter, a certain cutting-in
To vibration displacement signal, output vector p be the rotating speed, cutting-in under tri- directions of X, Y, Z dynamic milling force signal, imply
Layer has k neuron, and [w], [v] are weight matrix, and b, c are threshold vector.Hidden layer selects tanh S type letters
Number, output layer selects linear function.
The input/output relation of network is
In formula.
Using the vibration displacement value in tri- directions of X, Y, Z as input, shaking with tri- directions of X, Y, Z under same process parameter
Dynamic milling force value for output, train BP neutral nets.But under different technical parameters, the period sampling number is different, because
This network inputs, output layer neuron number also can be different.Therefore need to set up a neutral net for each technological parameter.
The input of this neutral net, the neuron number of output layer are 3.The determination of hidden layer neuron number does not have rule to follow, by reality
Calculate and determine.The frequency of training of neutral net is 1 000 times.After network training, the test sample for being not used as training is carried out
Reconstruct.
（1）Static calibration
When machine spindle speed is less than 1000 rev/min, deposited between the Milling Force surveyed and the vibration displacement surveyed
In linear relationship, i.e. the Static stiffness can be by calculating.The milling cutter overhang during by static state sees a cantilever beam as,
Wherein known to cantilevered length.The shaft portion of overhanging is cylinder beam, known to cross sectional moment of inertia；Cutter tooth part is helicla flute knot
Structure, can be by waiting mass method method to be equivalent to a cylinder beam.
Static calibration experiment is carried out to measuring system, the vibration displacement of electric vortex sensor measuring knife bar is used in experiment.
Milling Process is carried out under relatively low milling cutter rotating speed, changes cutting parameter.Measure the Milling Force under several groups of different Milling Parameters and milling
The vibration displacement of measurement point on knife knife bar, carries out linear fit to measurement data using least square method, determines the experiment of milling cutter
Static stiffness, the Static stiffness that static calibration experiment is finally drawn is approached with calculating gained Static stiffness.
（2）Dynamic compensation
When milling cutter rotating speed is higher, measuring system working band will be unable to covering all spectrum components of Milling Force and cause reality
The dynamic milling force distortion of survey, enters Mobile state to measuring system by compensation tache and compensates, the discrete transfer function of compensation tache
Drawn by Experimental Identification, can be mended the measurement distortion caused by tooling system dynamic characteristic near intrinsic frequency
Repay.
（3）Experimental verification
In order to verify the validity and accuracy of this paper millings force measuring system and dynamic compensation method, reality has been carried out
The dynamic milling force measurement of Milling Process and confirmatory experiment.Experiment lathe is the shaft vertical machining center of VDL-1000E types three, cutter
For Sandvik whole hard alloy ball end mill（R216.64-08030-AO09G 1610）Diameter 8mm, 30 ° of helical angle
Four sword hard alloy bulb milling cutters, workpiece material is the hardened steel of different hardness.For the accuracy of confirmatory measurement result, experiment
When measure dynamic milling force in Milling Process in real time using Kistler 9527B types three-dimensional force sensors, and as
With reference to Milling Force.The Time Domain Amplitude of Milling Force is substantially identical with reference to Milling Force, and phase is delayed, the width at driving frequency
Error is 7% or so between value and reference Milling Force.
Mould milling force measuring method and sensor isolation mounting based on knife bar vibration displacement, the isolation mounting are mainly wrapped
Include：Magnet base, vibration isolation heelpiece, vibration isolation side pad, vibration isolator, overhead gage, packing ring, taper clamp system, connecting bracket, taper are compressed
Block, sliding bar, vibration damping sliding bar（Damping block, packing ring）, knob, locking sliding equipment composition, as shown in Fig. 2,3,4,5,6.
Magnet base：Magnet base is fixed on machine tool chief axis by magnet, while being connected to each insulator.
Vibration isolation heelpiece：As the spindle turns, the extensional vibration to presence can play vibration isolation effect, material selection elasticity
Steel.
Vibration isolation side pad：Vibration isolation side pad is placed between taper clamp system and magnetic stand, as the spindle turns, to presence
Longitudinally, laterally vibration can play a part of vibration isolation, material selection Elastic Steel.
Vibration isolator：Vibration isolator is placed between overhead gage and magnet base, and vibration isolation effect, material are further played to extensional vibration
From Elastic Steel.
Overhead gage：Compress vibration isolator and play vibration isolation effect, material selection Elastic Steel.
Taper clamp system：Vibration isolation clamp system is placed between vibration isolation side pad and built-in block, can be risen when installing
To the effect of clamping, adjustment effect can be played when vibration is produced.
Sliding bar connecting bracket：Sliding bar and isolation mounting are connected by locking sliding equipment.
Taper compact heap：It is both the mass of vibration isolation, also functions to pressuring action.
Lock sliding equipment：Both the locus of charge displacement sensor can be adjusted, sliding bar can also be locked.
Clamp ring：Clamp ring locks sliding bar with swivel bolt.
Sliding bar：Positioning action is slided, can be with 360 degree of rotations.
Vibration damping sliding bar：Damping block and packing ring built in vibration damping sliding bar, damping block surrounding have damping oil, can play certain
Damping effect, can also 360 degree rotation.
Screw rod knob：Both any locus of sliding bar can have been adjusted, locking effect can also be played.
Claims (2)
1. one kind is based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, its composition includes：Milling device, its feature
It is：Described milling device includes main shaft, and described main shaft side face has in plane, described plane by magnetic force and dynamic milling
Force measuring device connection is cut, the other end of described dynamic milling force measuring device is provided with current vortex sensor, described electricity
Eddy current sensor front end face is fitted with the outer surface of knife bar, and described current vortex sensor rear end is with calculating mechatronics；
Described dynamic milling force measuring device is included on vibration damping sliding bar, magnet base, described vibration damping sliding bar front plan
Locking sliding equipment A is installed, described locking sliding equipment A sides are installed with screw rod knob A and also cross described vibration damping
Have in sliding bar, described vibration damping sliding bar and damping block is installed in hole, described hole, described hole and described damping block
Between be equipped with damping fluid, described damping block end face be provided be provided with packing ring, described locking sliding equipment A described in
Current vortex sensor；
Described vibration damping sliding bar passes through clamp ring, and described clamp ring is fixed with locking sliding equipment B, and described locking is slided
It is respectively provided with motivation structure B outside screw rod knob B, sliding bar, described sliding bar and is cased with locking sliding equipment C, it is described
Locking sliding equipment C in be installed with screw rod knob C and also cross connecting bracket；
There is conical socket, described conical socket is built with taper clamp system, described taper inside described magnet base
Taper compact heap is housed, described taper clamp system bottom surface is separately installed with dividing plate bottom with two sides inside clamp system
Be connected above pad, bulkhead sides pad, described magnet base by bolt with overhead gage, described magnet base and described overhead gage it
Between dividing plate pad is installed, described overhead gage middle part is connected by screw thread with described connecting bracket, described connection branch
Small washer is housed, described magnet base side is provided with adjustment button between frame and described overhead gage；
It is connected below described main shaft by the conical surface with described knife bar, described knife bar has milling cutter sword, described milling cutter sword
Fitted with workpiece, described workpiece lower plane is fixed with workbench.
2. the measurement based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus described in a kind of utilization claim 1
Method, it is characterized in that：This method comprises the following steps：It is by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, tapered clamp first
Tight mechanism, sliding bar connecting bracket, taper compact heap, it is put into successively inside magnet base, and passes through deep gouge screw in compression overhead gage
With magnet base, sliding bar is arranged in sliding bar connecting bracket by locking sliding equipment；
Damping block, packing ring will be put into inside vibration damping sliding bar, and locked, sliding bar is arranged on again by locking sliding equipment
On, by the cooperation of sliding bar and vibration damping sliding bar and retaining mechanism, it is realized the elongation and rotation of space six degree of freedom
Turn, current vortex sensor is then put on vibration damping sliding bar, and whole vibrating isolation system is fixed on lathe master by magnet base
On axle, the vibration displacement that sliding bar and vibration damping sliding bar enable current vortex sensor accurately to measure knife bar is adjusted；
During measurement, current vortex sensor is first passed through, the vibration displacement of cutter bar of milling cutter during measurement Milling Process is afterwards according to measurement
The static calibration result of system, the transitive relation between vibration displacement and Milling Force is recognized based on neutral net, thus, passes through milling
The vibration displacement of knife knife bar determines corresponding Milling Force, Milling Force measurement problem of dtmf distortion DTMF during for high-speed milling, passes through compensation
Link enters Mobile state compensation to measuring system, and the finally measurement to dynamic milling force carries out experimental verification.
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| CN111618657B (en) * | 2020-05-21 | 2021-04-27 | 西安交通大学 | Universal on-machine non-contact calibration method for eccentric parameters of milling cutter |
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