CN203409360U - Band saw blade vibration active inhibition device based on main vibration mode prediction - Google Patents
Band saw blade vibration active inhibition device based on main vibration mode prediction Download PDFInfo
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- CN203409360U CN203409360U CN201320447302.4U CN201320447302U CN203409360U CN 203409360 U CN203409360 U CN 203409360U CN 201320447302 U CN201320447302 U CN 201320447302U CN 203409360 U CN203409360 U CN 203409360U
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- band saw
- band
- current vortex
- vibration
- saw blade
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Abstract
The utility model discloses a band saw blade vibration active inhibition device based on main vibration mode prediction and a method. The band saw blade vibration active inhibition device is capable of sampling and analyzing multi-dimensional vibration in real time and extracting characteristic values of a band saw blade in horizontal direction, longitudinal direction and reversing direction. The band saw blade vibration active inhibition device is based on real-time band saw blade vibration characteristics to carry out main vibration mode prediction. The band saw blade vibration active inhibition device is based on band saw blade main vibration mode identification and prediction feedback to respond to a specially designed electro-hydraulic damping shock absorber at a high speed. The band saw blade vibration active inhibition device can be used for displaying the vibration amplitude of the band saw blade in real time, is suitable for band sawing machines with oil sources and has an obvious band saw vibration inhibition effect.
Description
Technical field
The utility model relates to a kind of bands for band equipment for inhibiting of vibration, particularly a kind of bands for band vibration active suppression device based on the main mode prediction of shaking.
Background technology
Band saw machine is the renewal product that replaces old-fashioned hacksawing machine, high with its sawing precision, saw kerf is little, has the features such as energy-efficient, is widely used in the occasions such as the various metal materials of sawing and nonmetallic materials.Band saw for metal is the core component of band sawing machine, and closed metal saw blade that sharp teeth tough and tensile by is stretched on driving wheel and forms, for cutting metal.In actual sawing processing, during band saw running, because a variety of causes causes forced vibration, bands for band vibration can cause material unaccounted-for (MUF), reduces blade life, sawn timber dimensional accuracy and machined surface are of poor quality, and can have larger impact to the production efficiency of band saw machine.Visible, but to shaking of band saw for metal, be very important, therefore, development band saw machine band saw vibration-repressing device has very important meaning to high precision int, the high efficiency of research band saw machine.
At present, aspect the vibration suppression of band steel, if the patent No. is the device that CN200320109335.4 discloses a kind of inhibiting band steel vibration on (Granted publication CN2649201, October 20 2004 Granted publication day), it comprises coil, a displacement transducer; This displacement transducer successively circuit connects a conditioner, a commutation controller; And the circuit of output terminal of this commutation controller connects this coil; This coil, this displacement transducer are placed in and approach near band steel and keep noncontact.It carrys out inhibiting band steel vibration by producing electromagnetic force, but has avoided the damage that adopts the direct way of contact to shake to belt steel surface, but whole to press down vibration body system too complicated, must increase the coupling automatic control system of power source special and solenoid.In addition this device to sensor require highly, and its life-span is not high, under the fickle condition of belt steel thickness, inhibition of vibration is not good., and be not suitable for the requirement of band saw machine band saw vibration-repressing device therefore.If the patent No. is CN 200610026073.3 (Granted publication CN101062510, October 31 2007 Granted publication day) a kind of non-contact band-steel vibration-repressing device is disclosed, this vibration-repressing device enters permanent magnet air casing is built-in on the one hand, utilize permanent magnet to produce magnetic field, band steel is produced to attraction, do not need to consume additional electrical energy, do not need special-purpose power-supply device and complicated robot control system(RCS) yet, on the other hand, the leading flank of watertight aircase offers jet round, the gas uniform that jet round is discharged, utilize the compressed-air actuated acting in conjunction in the controlled tension force with steel and air casing, make to be damping vibration attenuation motion with the vibration of steel.If the patent No. is CN201010287871.8 (Granted publication CN102029546A, at on 04 27th, 2011 Granted publication day) a kind of equipment for inhibiting of vibration is disclosed, it can be reliably and promptly suppresses " flutter ", and can realize the high efficiency of the raising of machined surface precision, the long lifetime of instrument and processing.In arithmetic unit, according to the vibration acceleration being detected by vibrating sensor, resolve and carry out computing according to this analysis result at any time, and analysis result and operation result are shown in to display unit in real time.Therefore, when suppressing " flutter ", operator can be on one side operates and makes rotary speed change on one side with reference to the demonstration of display unit to operating means, the situation in the past of rotary speed change is compared with rule of thumb waiting, can be more accurately and promptly suppress " flutter ".But above three devices can effectively carry out shaking to band steel.But its structure is also comparatively complicated, and high to device precision requirement, but device that must be so not loaded down with trivial details in the process of shaking for band saw.But being therefore not suitable for band saw machine band saw shakes.The utility model, for the deficiency of above technology, provides a kind of band saw machine band saw vibration-repressing device.
Summary of the invention
The utility model is not enough for prior art, and a kind of bands for band vibration active suppression device based on the main mode prediction of shaking is provided.
The technical scheme that the utility model technical solution problem adopts is:
A kind of bands for band vibration active suppression device based on the main mode prediction of shaking, comprise the first current vortex sensor, the second current vortex sensor, the 3rd current vortex sensor, the 4th current vortex sensor, first sensor support, the second mounting bracket, the 3rd mounting bracket, a thin-walled hydraulic cylinder, a piston rod earrings, a roller and a hydraulic cylinder installing rack.
The first described current vortex sensor and the second current vortex sensor are arranged on the first guide pillar of band saw machine by first sensor support, and the first current vortex sensor and the second current vortex sensor are in same perpendicular and over against bands for band side, the 3rd current vortex sensor and the 4th current vortex sensor are respectively by the second mounting bracket, the 3rd mounting bracket is arranged on the second guide pillar, wherein the 3rd current vortex sensor is arranged on the side of bands for band, the 4th current vortex sensor be arranged on bands for band directly over, thin-walled hydraulic cylinder is fixed on hydraulic cylinder installing rack by flange, the take-off lever top of described thin-walled hydraulic cylinder is fixedly installed piston rod earrings, in piston rod earrings, being provided with can free rolling roller, the axis direction of roller is vertical with the direction of motion of bands for band.
Beneficial effect:
1. the control accuracy of pair bands for band vibration is high, can show in real time the Oscillation Amplitude of bands for band.
2. applied widely, be applicable to all band sawing machines with oil sources.
3. adopt this kind of vibration control mode, obvious to the inhibition of vibration of band saw.
Accompanying drawing explanation
Fig. 1 is sensor and thin-walled hydraulic cylinder scheme of installation;
Fig. 2 is about the partial enlarged drawing of thin-walled hydraulic cylinder in Fig. 1;
Fig. 3 is signal acquisition module and controller module schematic diagram;
Fig. 4 is principles of signal processing block diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is carried out to detailed description.
As shown in Figure 1 and Figure 2, bands for band vibration active suppression device based on the main mode prediction of shaking, comprise the first current vortex sensor 2, the second current vortex sensor 3, the 3rd current vortex sensor 9, the 4th current vortex sensor 13, first sensor support 1, the second mounting bracket 10, the 3rd mounting bracket 11, a thin-walled hydraulic cylinder 8,15, one rollers 14 of a piston rod earrings and a hydraulic cylinder installing rack 7.
The first described current vortex sensor 2 and the second current vortex sensor 3 are arranged on the first guide pillar 4 of band saw machine by first sensor support 1, and the first current vortex sensor 2 and the second current vortex sensor 3 are in same perpendicular and over against bands for band 5 sides, the 3rd current vortex sensor 9 and the 4th current vortex sensor 13 are respectively by the second mounting bracket 10, the 3rd mounting bracket 11 is arranged on the second guide pillar 12, wherein the 3rd current vortex sensor 9 is arranged on the side of bands for band 5, the 4th current vortex sensor 13 be arranged on bands for band 5 directly over, thin-walled hydraulic cylinder 8 is fixed on hydraulic cylinder installing rack 7 by flange, the take-off lever top of described thin-walled hydraulic cylinder 8 is fixedly installed piston rod earrings 15, in piston rod earrings 15, being provided with can free rolling roller 14, the axis direction of roller 14 is vertical with the direction of motion of bands for band,
As shown in Figure 3, signal acquisition module adopts and grinds magnificent PLC-1716 data collecting card, and its main circuit will comprise analog input module, A/D modular converter, high-speed counter module and fifo module.Bands for band flutter simulation (electric current) signal gathering through described current vortex sensor 2,3,9,13 inputs to the analog input port of change-over panel module, the mode changeover signal that concrete connected mode is single-ended connection.
Capture card, by external cable, receives the analog signal of input change-over panel module, and carries out the high-speed a/d conversion of analog signal.Before conversion starts, capture card also will carry out passage scanner uni gain calculation process.Finally the data signal after the preliminary conversion of capture card and computing is transferred to controller module by binding post.
Controller module circuit comprises ARM chip, binding post, analog signal interface module and Asynchronous Serial Interface module.Data signal from signal acquisition module enters after ARM7 by binding post, through the principal mode mode recognizer based on EMD method for sieving, the control parameter but output is shaken, again according to the last time control result of being kept in by controller, the control parameter but rolling optimization shakes, by the digital data transmission of output to analog signal interface module, after the conversion of built-in D/A modular converter, by analog signal output S0 by analog signal transmission to executor module.
Described Asynchronous Serial Interface module adopts RS232 to be connected with ARM chip, for the interface communication of controller module and monitoring host computer.Controller module uploads to monitoring host computer by bands for band Vibration Condition by RS232 serial communication, and user can set from setting parameter by monitoring host computer.
Be illustrated in figure 4 principles of signal processing block diagram, can be roughly divided into the following steps:
The collection of step 1, data, amplification and A/D conversion
In band sawing machine running, described the first current vortex sensor 2, the second current vortex sensor 3, the 3rd current vortex sensor 9, the 4th current vortex sensor 13 detect the dither offset amount of bands for band laterally, longitudinally and in torque direction, export respectively analog signals value
p 1 (
t),
q 1 (
t),
x 1 (
t),
y 1 (
t).Capture card, by external cable, receives the analog signal of change-over panel, and carries out the high-speed a/d conversion of analog signal, and the data signal of output is
p 2 (
t),
q 2 (
t),
x 2 (
t),
y 2 (
t).
Step 2, extraction principal mode modal parameter
This step is mainly divided into that window function blocks, EMD screening, FFT conversion.With
x 2 (
t) be example:
To
x 2 (
t) carry out EMD screening after blocking with window function.
(1)
In formula,
u 1 (
t) be to connect with cubic spline curve
x 2 (
t) all maximum points form coenvelope lines,
d 1 (
t) be to construct lower envelope line with minimum point
If h
1meet two conditions, the so h of IMF
1be exactly
x 2 (
t) first component.
Two conditions are respectively:
1) what the waveform of IMF must sufficient Local Symmetric, the coenvelope line consisting of maximum point of IMF signal and the lower envelope line that consists of minimum site average is at any time all zero.
2) require in whole IMF signal, the number of zero crossing equates with limit number or differs at most one.
(2) if h
1do not meet the condition of IMF, h
1be considered as initial data, repeating step (1), obtains the mean value m of upper and lower envelope
11, ask h
11
See h
11whether meet the condition of IMF, if do not met, repeating step (2) is k time, until obtain substantially meet the condition of IMF time, obtain c
1=h
1kfor
x 2 (
t) an IMF component.
(3) by r
1as the initial data in step 1, judge r
1whether can also continue to decompose, if can not, Shai Fen Jie Bouquet; If can continue to decompose, r
1as initial data repeating step (1), (2), obtain
x 2 (
t) the 2nd IMF component C
2, so repeat n time, obtain n component that meets IMF condition.
Work as r
nthe Mean curve of envelope up and down while being a monotonic function, can not therefrom extract again the component that meets IMF condition, screening circulation finishes, and can obtain
So EMD screening finishes, from c
1to c
none group of function c of selection cycle maximum in minute
jas principal mode, to c
jbe FFT and convert to obtain c
j (f), from its amplitude versus frequency characte, select maximum amplitude, and be designated as s
3.Gained s
3be
x 2 (
t) corresponding principal mode modal parameter.
Can try to achieve respectively by that analogy
p 2 (
t),
q 2 (
t),
x 2 (
t),
y 2 (
t) principal mode modal parameter s
1, s
2, s
3, s
4.
The control parameter but step 3, calculating are shaken
Principal mode modal parameter based on above-mentioned, adopts pid control algorithm, calculates to control and suppresses parameter.
The k time sampling, its computing formula is
In formula,
k 1 ,
k 3 ,
k 4 be from setting parameter, represent respectively bands for band torque direction, laterally and the control ratio parameter of extensional vibration.
Δs
p
(k)=k
p
*[e(k)-e(k-1)]
Δs
i
(k)=k
i
*e(k)
Δs
d
(k)=k
d
*[e(k)-2*e(k-1)+e(k-2)]
Δs(k)=Δs
p
(k)+Δs
i
(k)+Δs
d
(k)
s(k)=s(k-1)+Δs(k)
In formula
s(
k) be but that shaking of the k time sampling controlled output;
e(
k-1) be that income value is calculated in the k-1 time sampling, work as k-1<1,
e(
k-1)=0;
k p , k i , k d for from setting parameter, need user to adjust voluntarily according to band sawing machine ruuning situation.
The control but step 4 is shaken
But will shake control parameter and be input to quick responsive valves by analog signal interface module, by quick responsive valves, control the amount of feeding of hydraulic cylinder piston, thereby but reach the object of shaking.
Claims (1)
1. based on the main bands for band that shakes mode prediction, vibrate active suppression device, comprise the first current vortex sensor, the second current vortex sensor, the 3rd current vortex sensor, the 4th current vortex sensor, first sensor support, the second mounting bracket, the 3rd mounting bracket, a thin-walled hydraulic cylinder, a piston rod earrings, a roller and a hydraulic cylinder installing rack;
It is characterized in that: the first described current vortex sensor and the second current vortex sensor are arranged on the first guide pillar of band saw machine by first sensor support, and the first current vortex sensor and the second current vortex sensor are in same perpendicular and over against bands for band side, the 3rd current vortex sensor and the 4th current vortex sensor are respectively by the second mounting bracket, the 3rd mounting bracket is arranged on the second guide pillar, wherein the 3rd current vortex sensor is arranged on the side of bands for band, the 4th current vortex sensor be arranged on bands for band directly over, thin-walled hydraulic cylinder is fixed on hydraulic cylinder installing rack by flange, the take-off lever top of described thin-walled hydraulic cylinder is fixedly installed piston rod earrings, in piston rod earrings, being provided with can free rolling roller, the axis direction of roller is vertical with the direction of motion of bands for band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320447302.4U CN203409360U (en) | 2013-07-23 | 2013-07-23 | Band saw blade vibration active inhibition device based on main vibration mode prediction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320447302.4U CN203409360U (en) | 2013-07-23 | 2013-07-23 | Band saw blade vibration active inhibition device based on main vibration mode prediction |
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| Publication Number | Publication Date |
|---|---|
| CN203409360U true CN203409360U (en) | 2014-01-29 |
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|---|---|---|---|
| CN201320447302.4U Withdrawn - After Issue CN203409360U (en) | 2013-07-23 | 2013-07-23 | Band saw blade vibration active inhibition device based on main vibration mode prediction |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447617A (en) * | 2013-07-23 | 2013-12-18 | 杭州电子科技大学 | Active inhibition device and method for band-saw blade vibration on the basis of master vibration modal prediction |
| CN105665822A (en) * | 2016-02-25 | 2016-06-15 | 杭州电子科技大学 | Numerical control band sawing machine with vibration attenuation and deviation rectification control device |
-
2013
- 2013-07-23 CN CN201320447302.4U patent/CN203409360U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447617A (en) * | 2013-07-23 | 2013-12-18 | 杭州电子科技大学 | Active inhibition device and method for band-saw blade vibration on the basis of master vibration modal prediction |
| CN103447617B (en) * | 2013-07-23 | 2016-04-06 | 杭州电子科技大学 | A kind of bands for band vibration active suppression device based on main mode prediction of shaking and method |
| CN105665822A (en) * | 2016-02-25 | 2016-06-15 | 杭州电子科技大学 | Numerical control band sawing machine with vibration attenuation and deviation rectification control device |
| CN105665822B (en) * | 2016-02-25 | 2017-10-03 | 杭州电子科技大学 | Numerical control band sawing machine with weakening and correcting controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20160406 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |