CN202770590U - Dynamic balancing tool holder of machining device, and dynamic balance control system of machining device - Google Patents

Abstract

The utility model provides a dynamic balancing tool holder of a machining device, and a dynamic balance control system of the machining device. The dynamic balance control system is mainly characterized in that a dynamic balancing tool holder is arranged on the main shaft of a machining device for fixing a machining tool, and the dynamic balancing tool holder is provided with more than one balance adjusting ring and more than one magnetic element. When the main shaft of the machining device is operated, the vibration quantity of the main shaft and the relative position of the dynamic balancing tool holder can be acquired by a dynamic balance control system, and operation is performed on the vibration quantity and the relative position by the dynamic balance control system to generate an adjusting angle value for adjusting the angle of the balance adjusting ring on the dynamic balancing tool holder so as to correct the amount of unbalance of the main shaft, so that the main shaft is prevented from being damaged, and the reliability of products is improved.

Description

The transient equilibrium hilt of processing machine and transient equilibrium control system thereof

Technical field

The utility model relates to a kind of transient equilibrium hilt and transient equilibrium control system thereof of processing machine, espespecially a kind of relative position that utilizes the Magnetic Induction Sense of Technology to answer set transient equilibrium hilt on the computing main shaft, and cooperation obtains the spindle vibration amount and adjusts angle value to calculate one, for the angle of adjusting this transient equilibrium hilt to make it reach the correlation technique of balance.

Background technology

Because various processing machine has at a high speed, high-precision process requirements, processing machine meets with the vibration problem that mass unbalance causes behind the main shaft high speed.

Above-mentioned unbalanced criterion, according to the made ISO1940 that stipulates of International Standards Organization, vibratory output when the condition that rotor uses according to rotor and running and being distinguished, it is divided into 11 etc. with balance quality grade, increase progressively step by step as increment take 2.5 times, by the G0.4 of the best to the poorest G4000, wherein the dynamic balance grade of processing machine main shaft and cutter is G6.3, it represents unbalanced quality and is positioned on the rotor radius with respect to the value of rotor general assembly (TW), also represents uneven eccentric distance for rotor axis.

And cause on the processing machine the unbalanced factor of main shaft a lot, for example the size of process tool often causes the difference of spindle dynamic balance too large, and then affects main shaft life-span and processing quality.

Be to solve the main shaft imbalance problem of processing machine, known correction technique comprise following several:

1. weight elimination method: be to utilize boring, milling mode to reduce the weight on remaining uneven limit on the main shaft.

2. added weight method: be the screw of pre-drilled constant depth on knife bar, after measurement obtains the transient equilibrium residual value, use the screw of known weight to be added in the pre-drilled screw, to revise the transient equilibrium value.

3. balancing loop is adjusted method: be the balancing loop of establishing two off-centre and known offset at knife bar, by changing its angle to adjust the amount of unbalance of knife bar.

Adjusting method with known transient equilibrium, is the balancing loop angle of adjusting two known offsets on the knife bar, adjusts the amount of unbalance of knife bar.Therefore how to determine to adjust the size of angle, namely directly affect the adjustment effect of amount of unbalance.

Summary of the invention

The utility model fundamental purpose is to provide a kind of transient equilibrium control system of processing machine, mainly be that transient equilibrium hilt at the processing machine main shaft sets up two balanced adjustment rings and a magnetic element separately, utilize magnetic induction way to obtain the relative position of transient equilibrium hilt, and the vibration values when detecting spindle operation simultaneously, the angle that should adjust to converse two balanced adjustment rings is used the amount of unbalance of quick correction main shaft.

To make the transient equilibrium control system of aforementioned processing machine comprise for reaching the technical way that aforementioned purpose takes:

One transient equilibrium hilt is installed on the main shaft of a processing machine, and for fixed cutting tool, this transient equilibrium hilt has a hilt body, is arranged with two balanced adjustment rings and a magnetic element on the hilt body;

One magnetic induction measurement device is with respect to the magnetic element on the aforementioned transient equilibrium hilt;

One Vibration Sensor is located on the main shaft of processing machine, the vibration values when measuring spindle operation;

One signal processing circuit is connected with aforementioned magnetic induction measurement device, Vibration Sensor respectively, is received from the sensing signal of magnetic induction measurement device, Vibration Sensor in order to conversion process;

One adjusts the angle computing module, is connected with aforementioned signal processing circuit, calculates one in order to the output signal according to signal processing circuit and adjusts angle value, for the angle of adjusting two balanced adjustment rings on the transient equilibrium hilt;

Above-described transient equilibrium control system mainly is when the processing machine spindle operation, utilize Vibration Sensor to measure the vibration values of main shaft, obtained simultaneously the relative position of transient equilibrium hilt by the magnetic induction measurement device, use and converse an adjustment angle value, and according to the balanced adjustment ring on this adjustment angle value adjustment transient equilibrium hilt, use the amount of unbalance of revising main shaft.Utilizing said system is to measure first processing machine main shaft correction amount of unbalance vibration values in the past, cooperate obtaining and the computing of correlation coefficient process of transient equilibrium hilt relative position, calculated the angle that set balanced adjustment ring should be adjusted on the transient equilibrium hilt, can fast and accurately be finished by this correction of main shaft amount of unbalance.

The utility model also provides a kind of transient equilibrium hilt of processing machine, has a hilt body, be arranged with two balanced adjustment rings and a magnetic element on the described hilt body, described hilt body is cylindric, be formed with two on its diametric plane towards the recessed annular groove of axis direction, to divide for a balanced adjustment ring being set, the groove height of described annular groove and thickness, the inner edge outline of flute profile and balanced adjustment ring; Each balanced adjustment ring is comprised of two semicircular half ring plates respectively, the two halves ring plate has respectively surface and a bottom surface, wherein the two ends, bottom surface of half ring plate are formed with respectively a recess, two recesses make the less thick at half ring plate two ends, a protuberance is extended towards circumferencial direction respectively in the both ends of second half ring plate, described protuberance bottom surface flushes with the bottom surface of half ring plate, and the thickness of protuberance is fitted and is the degree of depth of second half ring plate two ends recess; Wherein half ring plate of each balanced adjustment ring is provided with a balancing weight.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the processing machine schematic diagram that the utility model is used;

Fig. 2 is the exploded view of the utility model set transient equilibrium hilt on the processing machine main shaft;

Fig. 3 is the floor map of the utility model set transient equilibrium hilt on the processing machine main shaft;

Fig. 4 is circuit block diagram of the present utility model.

Embodiment

Below cooperate preferred embodiment graphic and of the present utility model, further setting forth the utility model is to reach the technological means that predetermined utility model purpose is taked.

Relating to a preferred embodiment of the present utility model, please refer to shown in Figure 1ly, mainly is that the main shaft 11 at a processing machine 10 is provided with a transient equilibrium hilt 20, and this transient equilibrium hilt 20 is in order to fixed cutting tool; Main shaft 11 is provided with a Vibration Sensor 12 again, and in the present embodiment, this Vibration Sensor 12 is to accelerate rule by one to consist of.

Please cooperate with reference to shown in Figure 2, this transient equilibrium hilt 20 has a hilt body 200, is arranged with two balanced adjustment rings 30,30 ' and a magnetic element 21 on the hilt body 200; The mounting means that relates to balanced adjustment ring 30,30 ', in detail as described below:

The hilt body 200 of this transient equilibrium hilt 20 is cylindric, be formed with two on these hilt body 200 diametric planes towards the recessed annular groove 201 of axis direction, 202, to divide for a balanced adjustment ring 30 is set, 30 ', the groove height of this annular groove 201,202 and thickness, the inner edge outline of flute profile and balanced adjustment ring 30,30 '.

This balanced adjustment ring 30,30 ' respectively by two semicircular half ring plates 31,32 form (because two balanced adjustment rings 30,30 ' structure is identical, below only with its structures of a balanced adjustment ring 30 explanation wherein), two halves ring plate 31,32 have respectively surface and a bottom surface, wherein the two ends, bottom surface of half ring plate 31 are formed with respectively a recess 310, two recesses 310 make the less thick (for example becoming half) at half ring plate, 31 two ends, a protuberance 320 is extended towards circumferencial direction respectively in the both ends of second half ring plate 32, these protuberance 320 bottom surfaces flush with the bottom surface of half ring plate 32, the thickness of protuberance 320 is suitable be the degree of depth of second half ring plate 31 two ends recesses 320, and the girth of protuberance 320 is fitted and is the girth of recess 310; When half ring plate 32 fully is superimposed on its protuberance 320 on the recess 310 of second half ring plate 31, fit to form an orbicular balanced adjustment ring 30.Wherein half ring plate 31 of balanced adjustment ring 30 is provided with a balancing weight 33 again, mainly is to be formed with a mounting hole 311 in this half ring plate 31, is embedded therebetween for balancing weight 33, in the present embodiment, two balanced adjustment rings 30,30 ' arrange balancing weight 33 respectively on half ring plate 31,32 of relative position.

Aforementioned two balanced adjustment rings 30 are installed, in the time of 30 ', be that its two halves ring plate was opened in 31,32 minutes, embed respectively again annular groove 201, in 202, make the recess 310 of two halves ring plate 31,32, protuberance 320 is able to superimposed matchingly, utilize tolerance and friction force that balanced adjustment ring 30,30 ' positively is fixed on the hilt body 200 of transient equilibrium hilt 20.

In the present embodiment, be to be arranged with a nut 22 in hilt body 200 lower ends again, be formed with a perforate 220 on the footpath wall of nut 22, for being embedded this magnetic element 21, in the present embodiment, this magnetic element 21 is made of nd-fe-b magnet.

Moreover, the utility model is that the relative position at aforementioned transient equilibrium hilt 20 is provided with a magnetic induction measurement device 40 (as shown in Figure 3), this magnetic induction measurement device 40 is with small distance (about 3 ~ 4mm) magnetic elements 21 with respect to hilt body 200 lower ends, when main shaft 11 rotation, detected the relative angle (position) of transient equilibrium hilt 20 by magnetic induction measurement device 40.In the present embodiment, magnetic induction measurement device 40 is made of a giant magnetoresistance effect (GMR) sensor.

Please refer to shown in Figure 4, the utility model further includes a signal processing circuit 50 and and adjusts angle computing module 60, this signal processing circuit 50 is connected with aforementioned magnetic induction measurement device 40, Vibration Sensor 12 respectively, is received from the sensing signal of magnetic induction measurement device 40, Vibration Sensor 12 in order to conversion process; This adjustment angle computing module 60 is the angles that produce 30,30 ' the palpus adjustment of two balanced adjustment rings according to the signal operation of aforementioned signal processing circuit 50 outputs, to revise the amount of unbalance of main shaft 11.

This signal processing circuit 50 mainly is comprised of a giant magnetoresistance effect control circuit 51, a waveform changing circuit 52 and a digital filter circuit 53, this giant magnetoresistance effect control circuit 51 is connected with magnetic induction measurement device 40, to receive and to process the detection signal that magnetic induction measurement device 40 transmits, 52 string ripple signals that giant magnetoresistance effect control circuit 51 is sent of this waveform changing circuit change square wave into; This digital filter circuit 53 is connected with Vibration Sensor 12, so that the signal that Vibration Sensor 12 is sent into carries out the filtering processing.

In the present embodiment, signal processing circuit 50 further is connected with a phase place arithmetical unit 54 and a data acquisition device 55, this phase place arithmetical unit 54 is connected with waveform changing circuit 52, so that its phase place of calculated signals according to 40 outputs of magnetic induction measurement device, deliver to by data acquisition device 55 again and adjust angle computing module 60, also deliver to by data acquisition device 55 after signal process digital filter circuit 53 filtering of Vibration Sensor 12 outputs again and adjust angle computing module 60, the angle that should adjust to calculate two balanced adjustment rings 30,30 '.In the present embodiment, this phase place arithmetical unit 54 is made of a complex programmable logic device (CPLD), and 55 of data acquisition devices are made of a data acquisition (Data Acquisition is called for short DAQ) card.This adjustment angle computing module 60 can be a computer, in the present embodiment, the method that angle is adjusted in these adjustment angle computing module 60 computings is correlation coefficient process, correlation coefficient process was one of method of estimation rotor unbalance value originally, correlation matrix is a transfer function (such as following formula 1-1), and vibratory output is the power that produces of amount of unbalance through the output of this transfer function:

$\left\{\stackrel{\‾}{V_0}\right\}=\left[\stackrel{\‾}{H}\right]\left\{M_0{\stackrel{\‾}{R}}_0\right\}---(1-1)$

Correlation matrix;

Main shaft original unbalance cause is with respect to the vibration signal phase place and size of reference point;

The main shaft original unbalance is with respect to the phase place and size (the unknown) of reference point.

In the present embodiment, aforementioned two balanced adjustment rings 30, amount of unbalance phase phasic difference 180 degree on 30 ', strength be input as the out-of-balance force that main shaft 11 amount of unbalances produce, and the moments of vibration of output is the vibration signals vector that Vibration Sensor (accelerating rule) 12 measures.The vibration signal amplitude size and the phase place that are obtaining the main shaft original unbalance and cause After remake test mass (trail weight), and with two balanced adjustment rings 30, the vector of 30 ' amount of unbalance is used as the amount of unbalance of test mass, again via the main shaft amount of unbalance, the two balanced adjustment rings 30 that measure behind the test mass, vibration signal amplitude size and the phase place of 30 ' amount of unbalance, three vector sums obtain following formula by this:

$\left\{\stackrel{\‾}{V_1}\right\}=\left[\stackrel{\‾}{H}\right]\{M_0{\stackrel{\‾}{R}}_0+M_1{\stackrel{\‾}{R}}_1\}---(1-2)$

Behind the test mass, vibration signal phase place and size that the amount of unbalance of two balanced adjustment rings and main shaft original unbalance vector sum cause with respect to reference point;

Behind the test mass, the known amount of unbalance vector sum of two balanced adjustment rings is with respect to phase place (the unknown) and the size of reference point.

Aforementioned formula (1-1), formula (1-2) two formulas are subtracted each other, obtain correlation matrix as follows:

$\left\{\stackrel{\‾}{V_0}\right\}-\left\{\stackrel{\‾}{V_1}\right\}=\left[\stackrel{\‾}{H}\right]\{M_0{\stackrel{\‾}{R}}_0+M_1{\stackrel{\‾}{R}}_1\}-\left[\stackrel{\‾}{H}\right]\left\{M_0{\stackrel{\‾}{R}}_0\right\}=\left[\stackrel{\‾}{H}\right]\left\{M_1{\stackrel{\‾}{R}}_1\right\}$

$\left[\stackrel{\‾}{H}\right]=\frac{\left\{\stackrel{\‾}{V_0}\right\}-\left\{\stackrel{\‾}{V_1}\right\}}{M_1{\stackrel{\‾}{R}}_1}---(1-3)$

To obtain after formula (1-3) the substitution formula (1-1):

$\left\{\stackrel{\‾}{V_0}\right\}=\left[\frac{\stackrel{\‾}{V_0}-{\stackrel{\‾}{V}}_1}{M_1{\stackrel{\‾}{R}}_1}\right]\left\{M_0{\stackrel{\‾}{R}}_0\right\}$

$M_0{\stackrel{\‾}{R}}_0=\frac{\stackrel{\‾}{V_0}}{\stackrel{\‾}{V_1}-{\stackrel{\‾}{V}}_0}{M}_1{\stackrel{\‾}{R}}_1---(1-4)$

(1-4) can draw by formula,

For through behind test mass, the size of the main shaft original unbalance that estimates and the phase place of relative reference point, therefore as long as the size of adjusting two balanced adjustment ring vector sums with

Equate, and phase place with

Differ 180 degree, can revise the amount of unbalance on the main shaft 11.

According to as can be known above-mentioned, the mode of in fact adjusting two balanced adjustment rings 30,30 ' on the transient equilibrium hilt 20 is as described below:

1. measurement obtains the magnitude of vibrations of main shaft 11;

2. change the angle of two balanced adjustment rings 30,30 ' on the transient equilibrium hilt 20;

3. measurement obtains the magnitude of vibrations of main shaft 11 again;

4. calculate the optimization angle;

5. two balanced adjustment rings 30,30 ' are adjusted to optimization angle (the present embodiment is for manually adjusting);

6. again measure the magnitude of vibrations of main shaft 11, whether obtain effective correction with the amount of unbalance of confirming main shaft 11.

From the above, the utility model is to measure first processing machine main shaft correction amount of unbalance vibration values in the past, cooperate obtaining and the computing of correlation coefficient process of transient equilibrium hilt relative position, calculated the angle that set balanced adjustment ring should be adjusted on the transient equilibrium hilt, can fast and accurately be finished by this correction of main shaft amount of unbalance.

The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet be not to limit the utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims (9)

1. the transient equilibrium control system of a processing machine is characterized in that, the transient equilibrium control system of described processing machine comprises:

One transient equilibrium hilt is installed on the main shaft of a processing machine, and for fixed cutting tool, described transient equilibrium hilt has a hilt body, is arranged with two balanced adjustment rings and a magnetic element on the hilt body;

One magnetic induction measurement device is with respect to the magnetic element on the described transient equilibrium hilt;

One Vibration Sensor is located on the main shaft of processing machine, the vibration values when measuring spindle operation;

One signal processing circuit is connected with described magnetic induction measurement device, Vibration Sensor respectively, is received from the sensing signal of magnetic induction measurement device, Vibration Sensor in order to conversion process;

One adjusts the angle computing module, is connected with described signal processing circuit, and calculates an adjustment angle value according to the output signal of signal processing circuit, for the angle of adjusting two balanced adjustment rings on the transient equilibrium hilt.

2. the transient equilibrium control system of described processing machine according to claim 1 is characterized in that, described magnetic induction measurement device is a giant magnetoresistance effect sensor;

Described signal processing circuit comprises a giant magnetoresistance effect control circuit, a waveform changing circuit and a digital filter circuit, described giant magnetoresistance effect control circuit is connected with the magnetic induction measurement device, to receive and to process the detection signal that the magnetic induction measurement device transmits, the string ripple signal that described waveform changing circuit is sent the giant magnetoresistance effect control circuit changes square wave into; Described digital filter circuit is connected with Vibration Sensor.

3. the transient equilibrium control system of described processing machine according to claim 2, it is characterized in that, further be provided with a phase place arithmetical unit, a data acquisition device between described waveform changing circuit and adjustment angle computing module, so that according to its phase place of calculated signals of magnetic induction measurement device output, deliver to by the data acquisition device again and adjust the angle computing module;

Described digital filter circuit output terminal also is connected with adjustment angle computing module by the data acquisition device.

4. the transient equilibrium control system of described processing machine according to claim 3 is characterized in that, described phase place arithmetical unit is a complex programmable logic device;

Described data acquisition device is a data acquisition DAQ card.

5. the transient equilibrium control system of described processing machine according to claim 4 is characterized in that, described Vibration Sensor is one to accelerate rule.

6. the transient equilibrium hilt of a processing machine has a hilt body, is arranged with two balanced adjustment rings and a magnetic element on the described hilt body, it is characterized in that:

Described hilt body is cylindric, is formed with two on its diametric plane towards the recessed annular groove of axis direction, to divide for a balanced adjustment ring being set, the groove height of described annular groove and thickness, the inner edge outline of flute profile and balanced adjustment ring;

Each balanced adjustment ring is comprised of two semicircular half ring plates respectively, the two halves ring plate has respectively surface and a bottom surface, wherein the two ends, bottom surface of half ring plate are formed with respectively a recess, two recesses make the less thick at half ring plate two ends, a protuberance is extended towards circumferencial direction respectively in the both ends of second half ring plate, described protuberance bottom surface flushes with the bottom surface of half ring plate, and the thickness of protuberance is fitted and is the degree of depth of second half ring plate two ends recess;

Wherein half ring plate of each balanced adjustment ring is provided with a balancing weight.

7. the transient equilibrium hilt of described processing machine according to claim 6 is characterized in that, is formed with a mounting hole on half ring plate of described balanced adjustment ring, is embedded therebetween for balancing weight.

8. the transient equilibrium hilt of described processing machine according to claim 7 is characterized in that, described two balanced adjustment rings arrange balancing weight in half ring plate of relative position respectively.

9. the transient equilibrium hilt of each described processing machine in 8 according to claim 6 is characterized in that, the sheathed nut in described hilt body lower end is formed with a perforate on the footpath wall of nut, for being embedded described magnetic element.

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