CN105108583A - Dynamic milling force measuring device based on vibration isolation type eddy current sensor and measuring method - Google Patents

Dynamic milling force measuring device based on vibration isolation type eddy current sensor and measuring method Download PDF

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Publication number
CN105108583A
CN105108583A CN201510287482.8A CN201510287482A CN105108583A CN 105108583 A CN105108583 A CN 105108583A CN 201510287482 A CN201510287482 A CN 201510287482A CN 105108583 A CN105108583 A CN 105108583A
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milling
sliding bar
vibration
vortex sensor
dynamic
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CN105108583B (en
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吴石
边立键
刘献礼
王洋洋
朱美文
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09Arrangements 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
    • B23Q17/0952Arrangements 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
    • B23Q17/0966Arrangements 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The invention relates to a dynamic milling force measuring device based on a vibration isolation type eddy current sensor and a measuring method. In the prior art, a sensor capable of measuring a dynamic milling force is generally mounted between a main shaft and a cutter, the sensor bears overlarge axial force and bending moment when used, at the same time, rotational dynamometers are complex in structure, an added mass is applied on a main shaft system, the rigidity of the main shaft system is reduced. The dynamic milling force measuring device comprises a milling device (16), the milling device comprises a main shaft (5), a side face of the main shaft has a plane, the plane is connected with the dynamic milling force measuring device (6) through magnetic force, the other end of the dynamic milling force measuring device is provided with an eddy current sensor (8), the front end face clings to the outer surface of a knife bar (4), and the rear end of the eddy current sensor is electrically connected with a computer (7). The invention is applied to the dynamic milling force measuring device based on the vibration isolation type eddy current sensor.

Description

Based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method
technical field:
the present invention relates to a kind of based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method.
background technology:
the sensor of current measurement dynamic milling force is generally arranged between main shaft and cutter, bears excessive axial force, moment of flexure during use, and these rotate dynamometer complex structure simultaneously, have larger additional mass, reduce the rigidity of axis system to axis system.
vehicle exterior cladding element mould is larger with common diel phase specific volume, complex-shaped, its manufacture difficulty is large, crudy and required precision very high, punch and matrix part-structure is complicated, and free form face exists again the profile that a large amount of such as groove, corner, projection, depression etc. comprise curvature.In complex-curved region, due to the complexity of milling characteristic, dynamic milling force has a strong impact on the crudy of workpiece and its processing cost is increased, and as can be seen here, is of great significance for the measurement tool of dynamic milling force in large mold process.
dynamic milling force for vehicle exterior cladding element mould is measured, be limited to the contact area between dynamometer and mould, dynamometer can only measure the dynamic cutting force of less mould, dynamometer also exists overload sensitive, needs special servicing unit etc. simultaneously, its dynamic characteristic can change etc. along with the change of die quality, and these reasons all restrict and the dynamic milling force measuring large mold.At present, the torsional forces sensor used generally is arranged between main shaft and cutter, need during use to avoid bearing excessive axial force, moment of flexure, in order to avoid affect the use of torque sensor, these rotate dynamometer complex structure, larger additional mass is had to axis system, and be cantilever type structure, reduce further the rigidity of axis system, therefore, need one simple, low cost, moved by the radial vibration displacement of rotary milling tools knife bar during measurement Milling Process, carry out the method for indirect inspection dynamic milling force.
in the process of machining, along with the state of high-speed rotating machine and reciprocating machinery, in vibration research, analysis to measure, for non-contacting high accuracy vibration, displacement signal, we need the many kinds of parameters that can collect cutter and machine vibration state continuously exactly, and the state of the direct non-cpntact measurement rotating shaft of current vortex sensor energy, crucial vibration information can be provided.And generally current vortex sensor is connected to main shaft side by a certain jockey and carries out non-contact detecting by usually, but produce the work that serious vibration affects current vortex sensor when main shaft runs up, so, in order to solve spindle vibration to the impact of measuring, effectively be integrated on main shaft by current vortex sensor, we just need a current vortex sensor vibration isolation type supporting arrangement.
for the limitation of existing dynamic milling force measuring method in processing work size, quality, Measurement bandwidth and mounting means etc., this product proposes a kind of measuring system utilizing current vortex sensor vibration isolation type supporting arrangement, the radial vibration displacement of rotary milling tools knife bar during measurement Milling Process, according to the relation between milling cutter vibration displacement and Milling Force, indirectly determined the method for dynamic milling force by vibration displacement.And problem of dtmf distortion DTMF is measured to the Milling Force under milling cutter high-speed milling speed, carry out dynamic compensation, improve the bandwidth of measuring system, realize the accurate measurement of dynamic milling force.
summary of the invention:
the object of this invention is to provide a kind of based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method.
above-mentioned object is realized by following technical scheme:
a kind of based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, its composition comprises: milling device, described milling device comprises main shaft, described main shaft side has plane, described plane is connected with dynamic milling force measuring device by magnetic force, the other end of described dynamic milling force measuring device is provided with current vortex sensor, and described current vortex sensor front end face and the outer surface of knife bar are fitted, and described current vortex sensor rear end is electrically connected with computer.
described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described dynamic milling force measuring device comprises vibration damping sliding bar, magnet base, described vibration damping sliding bar front plan is provided with locking slide mechanism A, described locking slide mechanism A side is installed with screw rod knob A and passes described vibration damping sliding bar simultaneously, in described vibration damping sliding bar, there is hole, in described hole, damping block is installed, between described hole and described damping block, damping fluid is housed, described damping block end face is provided with packing ring, in described locking slide mechanism A, described current vortex sensor is installed.
described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described vibration damping sliding bar is through clamp ring, described clamp ring is fixed with locking slide mechanism B, in described locking slide mechanism B, screw rod knob B, sliding bar are housed respectively, described sliding bar outer cover has locking slide mechanism C, is installed with screw rod knob C and passes connection bracket simultaneously in described locking slide mechanism C.
described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described magnet base inside has conical socket, described conical socket is built with taper clamp system, described taper clamping is in-house is equipped with taper compact heap, described taper clamp system bottom surface and two sides are separately installed with dividing plate heelpiece, bulkhead sides pad, be connected with overhead gage by bolt above described magnet base, dividing plate pad is installed between described magnet base and described overhead gage, described overhead gage middle part is connected with described connection bracket by screw thread, between described connection bracket and described overhead gage, small washer is housed, described magnet base side is provided with adjustment button.
described based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, be connected with described knife bar by the conical surface below described main shaft, described knife bar has milling cutter sword, and described milling cutter sword and workpiece are fitted, and described workpiece lower plane and workbench are fixed.
a kind of based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method, the method comprises the steps: it is first by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, taper clamp system, sliding bar connection bracket, taper compact heap, is put into inside magnetic stand successively, and by deep gouge screw in compression overhead gage and magnet base, sliding bar is arranged in sliding bar connection bracket by locking slide mechanism;
put into damping block, packing ring by inside vibration damping sliding bar, and lock.Again be arranged on sliding bar by locking slide mechanism, by coordinating of sliding bar and vibration damping sliding bar and retaining mechanism, make it can the elongation of implementation space six degree of freedom and rotation, then on vibration damping sliding bar, current vortex sensor is put, and whole vibrating isolation system is fixed on machine tool chief axis by magnet base, adjustment sliding bar and vibration damping sliding bar enable the vibration displacement of current vortex sensor Measurement accuracy knife bar;
during measurement, first pass through current vortex sensor, measure the vibration displacement of cutter bar of milling cutter during Milling Process, afterwards according to the static calibration result of measuring system, carry out the transitive relation between identification vibration displacement and Milling Force based on neutral net, thus, corresponding Milling Force is determined by the vibration displacement of cutter bar of milling cutter, problem of dtmf distortion DTMF is measured for Milling Force during high-speed milling, by compensation tache, dynamic compensation is carried out to measuring system, finally experimental verification is carried out to the measurement of dynamic milling force.
beneficial effect:
1. the present invention is the device utilizing vibration isolation type current vortex sensor to test dynamic milling force, mainly solve because vehicle exterior cladding element mould is too large, the problem that dynamometer is not installed, the dynamic milling force indirect measurement systems of this product can replace dynamometer completely, this installation cost is low, simple and practical, and the precision of the dynamic milling force of measurement is higher, compare with the dynamic milling force that dynamometer records, error only has 7%.
the measurement of dynamic milling force when the present invention is complex-curved to processing outer covering piece mould, and dynamic milling force and the prediction etc. of milling process stability during five-axle linkage processing integral wheel, by measuring and processing stability real-time estimate dynamic milling force, machined parameters can be revised, optimize tool feeding direction, also cutter, workpiece deformation can be controlled, for Tool Design, 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, the vibration displacement of cutter bar of milling cutter is made to measure accurately, the device inside of test is provided with vibration isolator, vibration isolation heelpiece, vibration isolation side pad, can play good vibration isolation effect in the process used.
vibration damping sliding bar inside of the present invention is provided with damper mechanism, by with the coordinating of vibration isolator, vibration isolating effect is fairly obvious, and this device is provided with sliding bar, locking slide mechanism, can according to actual conditions adjusting position very easily.
present system has multifunctionality, flutter can be predicted according to actual conditions, namely flutter is predicted according to the actual conditions of vibration cutting, along with cutting-in constantly increases in milling process, can flutter be there is in cutter, can chaos phenomenon be there is in the milling vibration signal at this moment obtained, so-called chaos refers to that the one occurred in deterministic system is seemingly random, similar random phenomenon, the methods such as Lyaunov exponential sum approximate entropy can be adopted to monitor the nonlinear characteristic change of vibration displacement signal in milling process, flutter is predicted with this, the vibration displacement signal data of cutter bar of milling cutter is obtained by current vortex sensor, if the sample frequency of vibration signal is 5000Hz, every 1024 points (0.2048 second time interval), maximum Lyapunov exponent and approximate entropy calculating are carried out for signal, result of calculation corresponds to milling vibration signal.
the present invention is when milling is bred, and when the dimension 2 that maximum Lyapunov exponent embeds, maximum Lyapunov exponent changes greatly, and is greater than 0.5 and has sudden change; Maximum Lyapunov exponent when maximum Lyapunov exponent that stage and flutter produce the stage is greater than steady milling is bred in flutter, and threshold value is greatly between 0.5-0.65.When steadily cutting, the approximate entropy numerical value of milling vibration signal is about 0.1, once flutter is bred, flutter generation approximate entropy numerical value will be brought up between 0.4 ~ 0.6.
the present invention is to the maximum Lyapunov exponent of vibration signal and Analysis of Approximate Entropy, the experimental study that too much group is similar is carried out under identical working condition, the repeatability of test is fine, repetitive rate reaches more than 94%, if set corresponding threshold value, can determine whether system of processing there occurs flutter, and therefore this product has multi-functional purposes exactly.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is the enlarged drawings of A in accompanying drawing 1.
accompanying drawing 3 is the dynamic milling force measuring device structural representations in accompanying drawing 1.
accompanying drawing 4 is A-A sectional views of accompanying drawing 3.
accompanying drawing 5 is B-B sectional views of accompanying drawing 3.
accompanying drawing 6 is exploded views of accompanying drawing 3.
detailed description of the invention:
embodiment 1:
a kind of based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, milling device 16, described milling device comprises main shaft 5, described main shaft side has plane, described plane is connected with dynamic milling force measuring device 6 by magnetic force, the other end of described dynamic milling force measuring device is provided with current vortex sensor 8, and described current vortex sensor front end face and the outer surface of knife bar 4 are fitted, 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 comprises vibration damping sliding bar 12, magnet base 9, described vibration damping sliding bar front plan is provided with locking slide mechanism A13, described locking slide mechanism A side is installed with screw rod knob A27 and passes described vibration damping sliding bar simultaneously, in described vibration damping sliding bar, there is hole, damping block 18 is installed in described hole, damping fluid 15 is housed between described hole and described damping block, described damping block end face is provided with packing ring 17, in described locking slide mechanism A, described current vortex sensor is installed.
embodiment 3:
according to embodiment 2 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described vibration damping sliding bar is through clamp ring 11, described clamp ring is fixed with locking slide mechanism B28, in described locking slide mechanism B, screw rod knob B14, sliding bar 10 are housed respectively, described sliding bar outer cover has locking slide mechanism C29, is installed with screw rod knob C30 and passes connection bracket 24 simultaneously in described locking slide mechanism C.
embodiment 4:
according to embodiment 3 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, described magnet base inside has conical socket, described conical socket is built with taper clamp system 25, described taper clamping is in-house is equipped with taper compact heap 23, described taper clamp system bottom surface and two sides are separately installed with dividing plate heelpiece 22, bulkhead sides pad 21, be connected with overhead gage 19 by bolt above described magnet base, dividing plate pad 20 is installed between described magnet base and described overhead gage, described overhead gage middle part is connected with described connection bracket by screw thread, small washer 26 is housed between described connection bracket and 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, be connected with described knife bar by the conical surface below described main shaft, described knife bar has milling cutter sword 3, and described milling cutter sword and workpiece 2 are fitted, and described workpiece lower plane and workbench 1 are fixed.
embodiment 6:
a kind of utilize described in embodiment 1-5 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method, this method is: be first by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, taper clamp system, sliding bar connection bracket, taper compact heap, be put into inside magnetic stand successively, and by deep gouge screw in compression overhead gage and magnet base, sliding bar is arranged in sliding bar connection bracket by locking slide mechanism;
damping block, packing ring is put into by inside vibration damping sliding bar, and lock, again be arranged on sliding bar by locking slide mechanism, by coordinating of sliding bar and vibration damping sliding bar and retaining mechanism, make it can the elongation of implementation space six degree of freedom and rotation, then on vibration damping sliding bar, put current vortex sensor, and be fixed on machine tool chief axis by whole vibrating isolation system by magnet base, adjustment sliding bar and vibration damping sliding bar enable the vibration displacement of current vortex sensor Measurement accuracy knife bar;
during measurement, first pass through current vortex sensor, measure the vibration displacement of cutter bar of milling cutter during Milling Process, afterwards according to the static calibration result of measuring system, carry out the transitive relation between identification vibration displacement and Milling Force based on neutral net, thus, corresponding Milling Force is determined by the vibration displacement of cutter bar of milling cutter, problem of dtmf distortion DTMF is measured for Milling Force during high-speed milling, by compensation tache, dynamic compensation is carried out to measuring system, finally experimental verification is carried out to the measurement of dynamic milling force.
embodiment 7:
according to embodiment 1-6 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, first dynamic milling force indirect measurement systems passes through current vortex sensor, measure the vibration displacement of cutter bar of milling cutter during Milling Process, namely in the process of Milling Process workpiece, current vortex sensor is adsorbed on main shaft side by vibration isolation type supporting arrangement, non-contact measurement is carried out to the vibration displacement of cutter bar of milling cutter, by determining the transfer function of measuring system, and by the static calibration of measuring system and dynamic compensation etc., obtain dynamic milling force in mold pressing process.As shown in Figure 1.
identification can be carried out by neutral net for the transitive relation between vibration displacement and Milling Force to obtain, be of value to the non-linear relation setting up dynamic milling force p and vibration displacement a like this, thus realize the measurement of dynamic milling force.The neutral net that measuring system of the present invention is selected is three layers of BP network, and theoretically, as long as training sample is enough, three layers of BP network can approach any one real system with arbitrary accuracy.Input vector a is the vibration displacement signal in X, Y, Z tri-directions under a certain rotating speed of milling cutter, a certain cutting-in, output vector p is the dynamic milling force signal in X, Y, Z tri-directions under this rotating speed, cutting-in, hidden layer has k neuron, [w], [v] are weight matrix, and b, c are threshold vector.Hidden layer selects tanh S type function, and output layer selects linear function.
the input/output relation of network is
in formula.
under same process parameter with the vibration displacement value in X, Y, Z tri-directions be input, with the dynamic milling force value of shaking in X, Y, Z tri-directions for exporting, training BP neutral net.But under different technical parameters, this period sampling number is different, the neuron number of therefore network input, output layer 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, and determines by real.The frequency of training of neutral net is 1000 times.After network training, the test sample not being used as training is reconstructed.
(1) static calibration
when machine spindle speed is lower than 1000 rev/min, there is linear relationship between the Milling Force surveyed and the vibration displacement surveyed, that is, this Static stiffness can by calculating.The milling cutter overhang during static state is seen as a cantilever beam, wherein cantilevered length is known.The shaft portion overhang is a cylinder beam, and cross sectional moment of inertia is known; Cutter tooth part is helical groove structure, is equivalent to a cylinder beam by waiting mass method method.
static calibration experiment is carried out to measuring system, in experiment, uses the vibration displacement of electric vortex sensor measuring knife bar.Under lower milling cutter rotating speed, carry out Milling Process, change cutting parameter.Record the vibration displacement of measurement point on Milling Force under several groups of different Milling Parameters and cutter bar of milling cutter, least square method is adopted to carry out linear fit to measurement data, determine the experiment Static stiffness of milling cutter, it is close with calculating gained Static stiffness that the Static stiffness finally drawn is tested in static calibration.
(2) dynamic compensation
when milling cutter rotating speed is higher, measuring system working band cannot cover all spectrum components of Milling Force and cause the dynamic milling force distortion of actual measurement, by compensation tache, dynamic compensation is carried out to measuring system, the discrete transfer function of compensation tache by experiment identification draws, the measurement distortion near intrinsic frequency that tooling system dynamic characteristic can be made to cause is compensated.
(3) experimental verification
in order to verify validity and the accuracy of Milling Force measuring system and dynamic compensation method herein, the dynamic milling force having carried out actual Milling Process is measured and confirmatory experiment.Experiment lathe is VDL-1000E type three shaft vertical machining center, cutter is four sword carbide alloy bulb milling cutters of Sandvik whole hard alloy ball end mill (R216.64-08030-AO09G1610) diameter 8mm, helical angle 30 °, and workpiece material is the hardened steel of different hardness.In order to the accuracy of confirmatory measurement result, during experiment, use Kistler9527B type three-dimensional force sensor measures the dynamic milling force in Milling Process in real time, and it can be used as with reference to Milling Force.The Time Domain Amplitude of Milling Force is substantially identical with reference to Milling Force, and phase place is delayed to some extent, is about 7% in driving frequency place amplitude and with reference to error between Milling Force.
based on mould Milling Force measuring method and the sensor isolation mounting of knife bar vibration displacement, this isolation mounting mainly comprises: magnet base, vibration isolation heelpiece, vibration isolation side pad, vibration isolator, overhead gage, packing ring, taper clamp system, connection bracket, taper compact heap, sliding bar, vibration damping sliding bar (damping block, packing ring), knob, locking slide mechanism composition, as shown in Fig. 2,3,4,5,6.
magnet base: magnet base is fixed on machine tool chief axis by magnet, is connected to each insulator simultaneously.
vibration isolation heelpiece: as the spindle turns, can play vibration isolation effect, material selection Elastic Steel to the extensional vibration existed.
vibration isolation side pad: vibration isolation side pad is placed between taper clamp system and magnetic stand, as the spindle turns, can play the effect of vibration isolation, material selection Elastic Steel to longitudinal, the oscillation crosswise that exist.
vibration isolator: vibration isolator is placed between overhead gage and magnet base, plays vibration isolation effect to extensional vibration further, material selection 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 play the effect of clamping, can play regulating action when vibrative time in time installing.
sliding bar connection bracket: connect sliding bar and isolation mounting by locking slide mechanism.
taper compact heap: the mass being vibration isolation, also plays pressuring action.
locking slide mechanism: the locus that both can adjust charge displacement sensor, also can lock sliding bar.
clamp ring: clamp ring and swivel bolt lock sliding bar.
sliding bar: slip positioning action, can 360 degree of rotations.
vibration damping sliding bar: the built-in damping block of vibration damping sliding bar and packing ring, damping block surrounding has damping oil, can play certain damping effect, also can 360 degree of rotations.
screw rod knob: any locus that both can adjust sliding bar, also can play locking effect.

Claims (6)

1. one kind based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, its composition comprises: milling device, it is characterized in that: described milling device comprises main shaft, described main shaft side has plane, described plane is connected with dynamic milling force measuring device by magnetic force, the other end of described dynamic milling force measuring device is provided with current vortex sensor, described current vortex sensor front end face and the outer surface of knife bar are fitted, and described current vortex sensor rear end is electrically connected with computer.
2. according to claim 1 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, it is characterized in that: described dynamic milling force measuring device comprises vibration damping sliding bar, magnet base, described vibration damping sliding bar front plan is provided with locking slide mechanism A, described locking slide mechanism A side is installed with screw rod knob A and passes described vibration damping sliding bar simultaneously, in described vibration damping sliding bar, there is hole, in described hole, damping block is installed, between described hole and described damping block, damping fluid is housed, described damping block end face is provided with packing ring, in described locking slide mechanism A, described current vortex sensor is installed.
3. according to claim 2 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, it is characterized in that: described vibration damping sliding bar is through clamp ring, described clamp ring is fixed with locking slide mechanism B, in described locking slide mechanism B, screw rod knob B, sliding bar are housed respectively, described sliding bar outer cover has locking slide mechanism C, is installed with screw rod knob C and passes connection bracket simultaneously in described locking slide mechanism C.
4. according to claim 2 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, it is characterized in that: described magnet base inside has conical socket, described conical socket is built with taper clamp system, described taper clamping is in-house is equipped with taper compact heap, described taper clamp system bottom surface and two sides are separately installed with dividing plate heelpiece, bulkhead sides pad, be connected with overhead gage by bolt above described magnet base, dividing plate pad is installed between described magnet base and described overhead gage, described overhead gage middle part is connected with described connection bracket by screw thread, between described connection bracket and described overhead gage, small washer is housed, described magnet base side is provided with adjustment button.
5. according to claim 1 based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus, it is characterized in that: be connected with described knife bar by the conical surface below described main shaft, described knife bar has milling cutter sword, described milling cutter sword and workpiece are fitted, and described workpiece lower plane and workbench are fixed.
6. one kind utilizes the measuring method utilizing vibration isolation type electric vortex sensor measuring dynamic milling power apparatus described in claim 1-5, it is characterized in that: the method comprises the steps: it is first by vibration isolation heelpiece, vibration isolation side pad, vibration isolator, packing ring, taper clamp system, sliding bar connection bracket, taper compact heap, is put into inside magnetic stand successively, and by deep gouge screw in compression overhead gage and magnet base, sliding bar is arranged in sliding bar connection bracket by locking slide mechanism;
Damping block, packing ring is put into by inside vibration damping sliding bar, and lock, again be arranged on sliding bar by locking slide mechanism, by coordinating of sliding bar and vibration damping sliding bar and retaining mechanism, make it can the elongation of implementation space six degree of freedom and rotation, then on vibration damping sliding bar, put current vortex sensor, and be fixed on machine tool chief axis by whole vibrating isolation system by magnet base, adjustment sliding bar and vibration damping sliding bar enable the vibration displacement of current vortex sensor Measurement accuracy knife bar;
During measurement, first pass through current vortex sensor, measure the vibration displacement of cutter bar of milling cutter during Milling Process, afterwards according to the static calibration result of measuring system, carry out the transitive relation between identification vibration displacement and Milling Force based on neutral net, thus, corresponding Milling Force is determined by the vibration displacement of cutter bar of milling cutter, problem of dtmf distortion DTMF is measured for Milling Force during high-speed milling, by compensation tache, dynamic compensation is carried out to measuring system, finally experimental verification is carried out to the measurement of dynamic milling force.
CN201510287482.8A 2015-05-29 2015-05-29 Based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method Expired - Fee Related CN105108583B (en)

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