CN117484261A - Intelligent pre-balancing system for turntable of high-speed milling and turning composite machining center - Google Patents
Intelligent pre-balancing system for turntable of high-speed milling and turning composite machining center Download PDFInfo
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- CN117484261A CN117484261A CN202311842954.2A CN202311842954A CN117484261A CN 117484261 A CN117484261 A CN 117484261A CN 202311842954 A CN202311842954 A CN 202311842954A CN 117484261 A CN117484261 A CN 117484261A
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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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
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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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
- B23Q11/0035—Arrangements for preventing or isolating vibrations in parts of the machine by adding or adjusting a mass, e.g. counterweights
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Abstract
The invention discloses an intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, which comprises a turntable table top, a mandrel, a bearing and a torque motor, wherein the mandrel is arranged at the center position of the turntable table top, the bearing is arranged at the bottom of the turntable table top around the mandrel, the torque motor can drive the turntable table top, the mandrel and the bearing to rotate, a vibration sensor is arranged at the position, close to the turntable table top, of the lower part of the turntable table top and in the outer ring of the bearing, the bottom of the mandrel is also provided with a speed sensor and a counting zero point, and the vibration sensor and the speed sensor are electrically connected with a control system. The milling and turning combined machining center solves the problem that the existing milling and turning combined machining center cannot achieve both precision and efficiency.
Description
Technical Field
The invention relates to the field of machining, in particular to an intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center.
Background
At present, a workpiece is arranged on a turntable with high-speed high-precision performance in a conventional milling and turning composite machining center; during processing, the parts are generally clamped symmetrically according to the rotation center, so that the mass distribution of the parts is more uniform, and the influence on dynamic balance is less when the parts rotate along with the turntable at high speed in the processing process. However, practice shows that under the condition of high-speed rotation of the turntable, no matter symmetrical parts or special-shaped parts (the shapes of the parts are asymmetric), the problem of large vibration caused by uneven mass distribution of the parts exists, and the precision of milling and turning combined machining and the service life of a cutter and a machine tool are seriously influenced. In order to ensure the machining precision, the rotation speed of the turntable is often required to be reduced, and the machining efficiency is sacrificed.
In summary, the prior art cannot meet the requirements of both precision and efficiency of the high-speed high-precision milling and turning composite machining center, and needs to be solved.
Disclosure of Invention
The invention aims to provide an intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, which solves the problem that the existing milling and turning composite machining center cannot simultaneously consider both precision and efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
the intelligent pre-balancing system comprises a turntable table top, a mandrel, a bearing and a torque motor, wherein the mandrel is arranged at the center position of the turntable table top, the bearing surrounds the mandrel and is arranged at the bottom of the turntable table top, the torque motor can drive the turntable table top, the mandrel and the bearing to rotate, a vibration sensor is arranged at the position, close to the turntable table top, of the lower part of the turntable table top and positioned at the high precision and in an outer ring of the bearing, the bottom of the mandrel is also provided with a speed sensor and a counting zero point, and the vibration sensor and the speed sensor are electrically connected with a control system;
the method for pre-balancing the turntable of the high-speed milling and turning composite machining center by using the intelligent pre-balancing system of the turntable of the high-speed milling and turning composite machining center comprises the following steps:
a. setting the rotating speed of the table top of the turntable, starting the table top of the turntable, and measuring the maximum value and the position of vibration of the table top of the turntable under the rotating frequency at the initial time through a vibration sensor when the rotating speed is stable;
b. stopping the operation of the table top of the turntable, and adding test weight on the table top of the turntable;
c. b, starting a turntable table surface, and measuring the maximum value and the position of vibration of the turntable table surface after test weight is added by a vibration sensor under the same rotating speed in the step a;
d. the control system operation module calculates the unbalance amount and the phase of the table top of the turntable through the position signal of the speed sensor;
e. and adding a counterweight with the most proper mass at the corresponding position of the table top of the turntable for balance compensation.
When the rotating speed of the turntable with the table top size of phi 1000mm is 80-500 r/min, unbalanced monitoring of the turntable can be continuously carried out, in the pre-balance mode, the balancing device vibrates the pre-balance turntable at high speed and high precision, vibration signals reflecting dynamic characteristics of the balancing device reflect in the operation process of the pre-balance turntable, the vibration sensor and the speed sensor are arranged at two sides of the outer ring position of the bearing which is positioned and rotated at high precision as close to the turntable as possible, the included angle of the mounting positions is 180 degrees, the torque motor drives the workbench, the bearing and the mandrel to rotate, and the counting zero point is arranged on the rotating mandrel; when the pre-balancing system works, the vibration sensor can detect vibration signals caused by unbalanced mass generated after the turntable is assembled with a workpiece in real time, data are quickly collected by the vibration sensor and the speed sensor and transmitted to the data collection card, analog signals are converted into digital signals, the collected vibration signals are subjected to filtering, noise removing and other treatments through the computer signal module, the vibration amplitude and the phase of the vibration signals are extracted, meanwhile, the magnitude and the phase of the unbalance of the turntable are quickly calculated by an operation program of a single-sided balance influence coefficient method designed by a computer, and the balance influence coefficient method comprises the following steps ofRepresenting influence coefficients, < >>Representing the original vibration signal of the turntable, < > and >>Representation additionVibration signal of turntable after weight test, < >>Indicating the weight of the test weight,Representing unbalanced mass of the turntable, and then performing balance compensation by adding weights with the most suitable mass at the corresponding positions of the table top of the turntable; the milling and turning composite turntable with the balancing device is particularly suitable for machining asymmetric parts, can reduce vibration, improve the precision and surface quality of the parts during high-speed and high-precision cutting of a milling and turning composite machining center, can improve efficiency, prolong the service life of a turntable, a cutter and the like, reduce the downtime of a machine tool, and better protect the machine tool.
As a further preferred aspect of the invention, the control system can be programmed, used and displayed based on a Windows PC, and the signals collected by the vibration sensor and the speed sensor are exchanged with the control system via Profibus or I/O interface.
As a further preferred mode of the invention, when pre-balancing is carried out, sampling of signals is carried out in whole period, namely, the rotation frequency signals of the table top of the turntable are amplified in whole period, and then the period of one table top of the turntable is uniformly divided into whole portions, and then the signals after frequency multiplication are used as trigger source signals for sampling by a data acquisition card, so that the sampling frequency is the whole multiple of the rotation frequency of the table top of the turntable, and the whole period of the table top of the turntable can be sampled.
As a further preferred aspect of the present invention, the processing of the signal at the time of the whole period sampling includes processing of a reference signal and processing of a vibration signal.
As a further preferred aspect of the present invention, the processing of the reference signal includes the steps of: calculating the rotating speed r of the rotating table according to the number N of pulses in the data acquisition card, the time t and the rotating number N of the rotating table; when the table top of the turntable is installed, a speed sensor reflector is stuck on the surface of the outer ring of the bearing, when light emitted by the speed sensor is reflected back, the sensor outputs a high level, when no light is reflected back, the sensor outputs a low level, signals output by the speed sensor are isolated through an optical coupler, and the signals output by the optical coupler are subjected to voltage regulation according to the voltage range of the recoverable signals of the data acquisition module to serve as reference signals; carrying out phase-locked loop processing on the signal after voltage regulation; and performing frequency multiplication on the signal processed by the phase-locked loop.
After the frequency multiplication amplification of the revolving stage rotation speed signal, the revolving stage rotation speed signal can be used as a trigger source signal for sampling by a data acquisition card, the clock pulse can be used as a turntable vibration signal for filtering; therefore, the real-time rotating speed of the turntable needs to be calculated, the rotating frequency signal of the turntable is multiplied to be used as the sampling frequency of the sensor, the rotating frequency signal of the turntable is multiplied by 360 times, when the turntable rotates for one period, 360 signal data can be acquired, the circumference of the turntable is 360 degrees, and each vibration signal is separated by 1 degree in the theoretical sampling. The signal after frequency multiplication phase locking is used as the sampling signal of the sensor, and the sampling frequency of the sensor can be automatically adjusted no matter how much the turntable is arranged, so that the sensor can complete uniform sampling of the whole period.
As a further preferred aspect of the present invention, the processing of the vibration signal includes the steps of: filtering the vibration signal measured by the vibration sensor; performing voltage regulation amplification on the filtered signal; the amplitude and phase of the vibration signal are obtained.
As a further preferred aspect of the present invention, the cut-off frequency in the filtering process is determined by the frequency of the external clock pulse, and the reference signal is subjected to frequency multiplication processing as a filtered clock.
As a further preferred aspect of the present invention, the calculation of the unbalance amount and the phase of the turntable surface includes the steps of: taking the rising edge of the reference signal as an initial 0 DEG point, taking the forward peak value of the vibration signal as a vibration starting point, performing time difference between the two reference points, wherein the time difference value is T, calculating the period T of the signal when the rotating speed is measured in the step 1, and multiplying the ratio of the time difference value T to the period T of the signal by 360 DEG to obtain the phase of the unbalance; and measuring for a plurality of periods, and summing the amplitude values of all vibration signals to obtain an average value which is the size of the unbalance.
After the processing, the reference signal and the vibration signal of the turntable are the same frequency signal, so that the phase difference between the vibration signal and the reference signal can be calculated as the phase of the unbalance amount.
Compared with the prior art, the invention can at least achieve one of the following beneficial effects:
1. compared with the traditional structure, the high-speed high-precision vibration pre-balancing turntable of the turning and milling composite machining center is additionally provided with a turntable pre-balancing system, and the core principle is that a precise vibration sensor is arranged at the outer ring part of a bearing of a rotary part, so that the running vibration of the bearing of the rotary part can be detected in real time, when abnormal vibration data occur, the vibration sensor can pick up vibration signals in real time, meanwhile, a machining center control system precisely determines the phase of unbalanced vibration according to the position signals of the speed sensor, and the balance of a workpiece system can be performed under the corresponding phase according to precise unbalanced data feedback and the phase, so that the machining cutting precision quality is improved; the high-speed high-precision turntable vibration pre-balancing technology of the horizontal machining center realizes the brand-new intelligent judging and identifying of the vibration of the workpiece rotating system with the intelligent judging and identifying function, and on the basis of structurally ensuring the original precision and performance of the turntable, the original vibration state of the turntable is measured in the machining application process of the high-speed high-precision turntable, the workpiece and the turntable clamping system are pre-balanced, the intelligent real-time judgment can be performed, and the state of the turntable can be effectively identified and optimized through the intelligent control system of the horizontal machining center. And the intelligent judging and identifying system can intelligently predict faults of the turntable through the vibration state.
2. After the frequency multiplication amplification of the revolving stage rotation speed signal, the revolving stage rotation speed signal can be used as a trigger source signal for sampling by a data acquisition card, the clock pulse can be used as a turntable vibration signal for filtering; therefore, the real-time rotating speed of the turntable needs to be calculated, the rotating frequency signal of the turntable is multiplied to be used as the sampling frequency of the sensor, the rotating frequency signal of the turntable is multiplied by 360 times, when the turntable rotates for one period, 360 signal data can be acquired, the circumference of the turntable is 360 degrees, and each vibration signal is separated by 1 degree in the theoretical sampling. The signal after frequency multiplication phase locking is used as the sampling signal of the sensor, and the sampling frequency of the sensor can be automatically adjusted no matter how much the turntable is arranged, so that the sensor can complete uniform sampling of the whole period.
3. After the processing, the reference signal and the vibration signal of the turntable are the same frequency signal, so that the phase difference between the vibration signal and the reference signal can be calculated as the phase of the unbalance amount.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of the analysis processing structure of the system of the present invention.
FIG. 3 is a flow chart of measurement calculation according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Specific example 1:
fig. 1, fig. 2 and fig. 3 show an intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, which comprises a turntable table top 1, a mandrel 2, a bearing 3 and a torque motor 4, wherein the mandrel 2 is arranged at the central position of the turntable table top 1, the bearing 3 is arranged at the bottom of the turntable table top 1 around the mandrel 2, the torque motor 4 can drive the turntable table top 1, the mandrel 2 and the bearing 3 to rotate, a vibration sensor 5 is arranged at the position, close to the high-precision positioning of the turntable table top 1, of the lower part of the turntable table top 1 and in the outer ring of the bearing 3, a speed sensor 6 and a counting zero point 7 are further arranged at the bottom of the mandrel 2, and the vibration sensor 5 and the speed sensor 6 are both connected with a control system through electric signals;
the method for pre-balancing the turntable of the high-speed milling and turning composite machining center by using the intelligent pre-balancing system of the turntable of the high-speed milling and turning composite machining center comprises the following steps:
a. setting the rotating speed of the turntable table top 1, starting the turntable table top 1, and measuring the maximum value and the position of vibration of the turntable table top 1 under the rotating frequency at the initial time through the vibration sensor 5 when the rotating speed is stable;
b. stopping the operation of the turntable table top 1, and adding test weight on the turntable table top 1;
c. b, starting a turntable table board, and measuring the maximum value and the position of vibration of the turntable table board 1 after test weight is added by using a vibration sensor 5 at the same rotating speed in the step a;
d. the control system operation module calculates the unbalance amount and the phase of the turntable table top 1 through the position signal of the speed sensor 6;
e. and adding a counterweight with the most proper mass at the corresponding position of the table top 1 of the turntable for balance compensation.
When the rotating speed of the turntable with the table top size of phi 1000mm is 80-500 r/min, unbalanced monitoring of the turntable can be continuously carried out, in the pre-balance mode, the balancing device vibrates the pre-balance turntable at high speed and high precision, vibration signals reflecting dynamic characteristics of the balancing device reflect in the operation process of the pre-balance turntable, the vibration sensor and the speed sensor are arranged at two sides of the outer ring position of the bearing which is positioned and rotated at high precision as close to the turntable as possible, the included angle of the mounting positions is 180 degrees, the torque motor drives the workbench, the bearing and the mandrel to rotate, and the counting zero point is arranged on the rotating mandrel; when the pre-balancing system works, the vibration sensor can detect vibration signals caused by unbalanced mass generated after the turntable is assembled with a workpiece in real time, data are quickly collected by the vibration sensor and the speed sensor and are transmitted to the data collection card to convert analog signals into digital signals, the collected vibration signals are subjected to filtering, noise removing and other treatments through the computer signal module, the vibration amplitude and the phase of the vibration signals are extracted, meanwhile, the magnitude and the phase of the unbalance of the turntable are quickly calculated through an operation program of a single-sided balance influence coefficient method designed by a computer, and then balance compensation is carried out by adding weights with the most suitable mass at corresponding positions of the turntable surface; the milling and turning composite turntable with the balancing device is particularly suitable for machining asymmetric parts, can reduce vibration, improve the precision and surface quality of the parts during high-speed and high-precision cutting of a milling and turning composite machining center, can improve efficiency, prolong the service life of a turntable, a cutter and the like, reduce the downtime of a machine tool, and better protect the machine tool.
Specific example 2:
the embodiment further describes a control system based on embodiment 1, the control system can be programmed, used and displayed based on a PC of Windows, and signals collected by the vibration sensor 5 and the speed sensor 6 are exchanged with the control system through a Profibus or an I/O interface.
Specific example 3:
the embodiment further illustrates pre-balancing based on the specific embodiment 1, and samples signals when pre-balancing, and adopts full-period sampling, namely, the rotation frequency signals of the turntable table top 1 are amplified by integer multiples, and then the period of one turntable table top 1 is uniformly divided into integer parts, and then the multiplied signals are used as trigger source signals for sampling by a data acquisition card, so that the sampling frequency is integer multiples of the rotation frequency of the turntable table top 1, and the sampling of the whole period of the turntable table top 1 can be realized.
Specific example 4:
this embodiment is further described on the basis of embodiment 3, in which the processing of the signal at the time of the full-period sampling includes the processing of the reference signal and the processing of the vibration signal.
Specific example 5:
this embodiment further describes processing of a reference signal based on embodiment 4, where the processing of the reference signal includes the following steps: calculating the rotating speed r of the rotating table according to the number N of pulses in the data acquisition card, the time t and the rotating number N of the rotating table; when the turntable table top 1 is installed, a speed sensor 6 reflector is stuck on the surface of the outer ring of the bearing 3, when light emitted by the speed sensor 6 is reflected, the sensor outputs a high level, when no light is reflected, the sensor outputs a low level, then signals output by the speed sensor 6 are isolated through an optical coupler, and the signals output by the optical coupler are subjected to voltage regulation according to the voltage range of the acquirable signals of the data acquisition module and are used as reference signals; carrying out phase-locked loop processing on the signal after voltage regulation; and performing frequency multiplication on the signal processed by the phase-locked loop.
After the frequency multiplication amplification of the revolving stage rotation speed signal, the revolving stage rotation speed signal can be used as a trigger source signal for sampling by a data acquisition card, the clock pulse can be used as a turntable vibration signal for filtering; therefore, the real-time rotating speed of the turntable needs to be calculated, the rotating frequency signal of the turntable is multiplied to be used as the sampling frequency of the sensor, the rotating frequency signal of the turntable is multiplied by 360 times, when the turntable rotates for one period, 360 signal data can be acquired, the circumference of the turntable is 360 degrees, and each vibration signal is separated by 1 degree in the theoretical sampling. The signal after frequency multiplication phase locking is used as the sampling signal of the sensor, and the sampling frequency of the sensor can be automatically adjusted no matter how much the turntable is arranged, so that the sensor can complete uniform sampling of the whole period.
Specific example 6:
this embodiment further describes processing of vibration signals based on embodiment 4, the processing of vibration signals including the steps of: filtering the vibration signal measured by the vibration sensor 5; performing voltage regulation amplification on the filtered signal; the amplitude and phase of the vibration signal are obtained.
Specific example 7:
in this embodiment, the filtering process is further described based on embodiment 6, and the cut-off frequency in the filtering process is determined by the frequency of the external clock pulse, so that the reference signal needs to be subjected to the frequency multiplication process as the filtered clock.
Specific example 8:
in this embodiment, the turntable top 1 is further described on the basis of the specific embodiment 1, and the calculation of the magnitude and the phase of the unbalance amount of the turntable top 1 includes the following steps: taking the rising edge of the reference signal as an initial 0 DEG point, taking the forward peak value of the vibration signal as a vibration starting point, performing time difference between the two reference points, wherein the time difference value is T, calculating the period T of the signal when the rotating speed is measured in the step 1, and multiplying the ratio of the time difference value T to the period T of the signal by 360 DEG to obtain the phase of the unbalance; and measuring for a plurality of periods, and summing the amplitude values of all vibration signals to obtain an average value which is the size of the unbalance.
After the processing, the reference signal and the vibration signal of the turntable are the same frequency signal, so that the phase difference between the vibration signal and the reference signal can be calculated as the phase of the unbalance amount.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. The utility model provides an intelligence pre-balance system for high-speed compound machining center revolving stage that mills, includes revolving stage mesa (1), dabber (2), bearing (3) and torque motor (4), dabber (2) set up the central point of revolving stage mesa (1), bearing (3) encircle dabber (2) and set up the bottom at revolving stage mesa (1), torque motor (4) can drive revolving stage mesa (1), dabber (2) and bearing (3) gyration, its characterized in that: a vibration sensor (5) is arranged at the position, close to the inner position of the outer ring of the turntable table top (1), of the turntable table top (1) and the bearing (3), a speed sensor (6) and a counting zero point (7) are also arranged at the bottom of the mandrel (2), and the vibration sensor (5) and the speed sensor (6) are both connected with a control system through electric signals;
the method for pre-balancing the turntable of the high-speed milling and turning composite machining center by using the intelligent pre-balancing system of the turntable of the high-speed milling and turning composite machining center comprises the following steps:
a. setting the rotating speed of the turntable table top (1), starting the turntable table top (1), and measuring the maximum value and the position of vibration of the turntable table top (1) under the rotating frequency at the initial time through a vibration sensor (5) when the rotating speed is stable;
b. stopping the operation of the turntable table top (1), and adding test weight on the turntable table top (1);
c. b, starting a turntable table board, and measuring the maximum value and the position of vibration of the turntable table board (1) after test weight is added by a vibration sensor (5) at the same rotating speed in the step a;
d. the control system operation module calculates the unbalance amount and the phase of the turntable table top (1) through the position signal of the speed sensor (6);
e. and adding a counterweight with the most proper mass at the corresponding position of the table top (1) of the turntable for balance compensation.
2. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 1, characterized in that: the control system can be programmed, used and displayed based on a PC of Windows, and signals collected by the vibration sensor (5) and the speed sensor (6) are exchanged with the control system through Profibus or an I/O interface.
3. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 1, characterized in that: when pre-balancing is carried out, sampling is carried out on signals in the whole period, namely, the rotation frequency signals of the turntable table boards (1) are amplified in the whole period, and then the period of one turntable table board (1) is uniformly divided into integer parts, and then, the signals after frequency multiplication are used as trigger source signals for sampling by a data acquisition card, so that the sampling frequency is the integer times of the rotation frequency of the turntable table boards (1), and the whole period of the turntable table boards (1) can be sampled.
4. An intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 3, characterized in that: the processing of the signal at the time of the whole period sampling includes processing of a reference signal and processing of a vibration signal.
5. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 4, wherein: the processing of the reference signal comprises the following steps: calculating the rotating speed r of the rotating table according to the number N of pulses in the data acquisition card, the time t and the rotating number N of the rotating table; when the turntable table top (1) is installed, a speed sensor (6) reflector is stuck on the surface of an outer ring of the bearing (3), when light emitted by the speed sensor (6) is reflected, the sensor outputs a high level, when no light is reflected, the sensor outputs a low level, then signals output by the speed sensor (6) are isolated through an optical coupler, and according to the voltage range of a signal which can be acquired by a data acquisition module, the signals output by the optical coupler are subjected to voltage regulation and serve as reference signals; carrying out phase-locked loop processing on the signal after voltage regulation; and performing frequency multiplication on the signal processed by the phase-locked loop.
6. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 4, wherein: the processing of the vibration signal comprises the following steps: filtering the vibration signal measured by the vibration sensor (5); performing voltage regulation amplification on the filtered signal; the amplitude and phase of the vibration signal are obtained.
7. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 6, wherein: the cut-off frequency in the filtering process is determined by the frequency of the external clock pulse, and the reference signal is required to be subjected to frequency multiplication processing as a filtered clock.
8. The intelligent pre-balancing system for a turntable of a high-speed milling and turning composite machining center, according to claim 1, characterized in that: the calculating of the unbalance amount and the phase of the turntable table top (1) comprises the following steps: taking the rising edge of the reference signal as an initial 0 DEG point, taking the forward peak value of the vibration signal as a vibration starting point, performing time difference between the two reference points, wherein the time difference value is T, calculating the period T of the signal when the rotating speed is measured in the step 1, and multiplying the ratio of the time difference value T to the period T of the signal by 360 DEG to obtain the phase of the unbalance; and measuring for a plurality of periods, and summing the amplitude values of all vibration signals to obtain an average value which is the size of the unbalance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311842954.2A CN117484261B (en) | 2023-12-29 | 2023-12-29 | Intelligent pre-balancing system for turntable of high-speed milling and turning composite machining center |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010008086A1 (en) * | 1996-01-31 | 2001-07-19 | Colarelli Nicholas J. | Wheel balancer with control circuit and rim runout measurement |
| CN101038228A (en) * | 2007-02-07 | 2007-09-19 | 北京航空航天大学 | High accuracy number online dynamic balance detecting device based on FPGA |
| JP2007315924A (en) * | 2006-05-26 | 2007-12-06 | Japan Aerospace Exploration Agency | Non contact measurement of impact and impulse using magnetic force supported balance device |
| CN101158614A (en) * | 2007-11-15 | 2008-04-09 | 中北大学 | High speed chief axis on-line dynamic poise device |
| CN101192806A (en) * | 2006-11-23 | 2008-06-04 | 全汉企业股份有限公司 | A control method of transformer excitation cycle and its control circuit |
| CN101556200A (en) * | 2008-06-24 | 2009-10-14 | 郑州大学 | Vector spectrum based dynamic balance method for flexible rotor |
| CN101915639A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Tri-axial self-adaptive dynamic balance execution method for centrifugal machine |
| TWM449055U (en) * | 2012-10-12 | 2013-03-21 | Goodway Machine Corp | Dynamic balance computing device for spindle of machine tool |
| CN103105266A (en) * | 2013-01-16 | 2013-05-15 | 东南大学 | Dynamic balance method of bending moment of rotating mechanical rotor biplane |
| CN103487253A (en) * | 2012-06-13 | 2014-01-01 | 波音公司 | Engine vibration and engine trim balance test system, apparatus and method |
| US20190178765A1 (en) * | 2017-12-12 | 2019-06-13 | Imam Abdulrahman Bin Faisal University | Combined ultrasonic pulse velocity and schmidt hammer rebound test for non-destructive evaluation |
| CN111113130A (en) * | 2018-10-30 | 2020-05-08 | 四川省兴文县经久精密制造有限责任公司 | Active balance control system for high-speed electric spindle |
| CN115673874A (en) * | 2022-12-30 | 2023-02-03 | 北京精雕科技集团有限公司 | Method and device for detecting maneuvering balance of numerical control machine turntable |
| CN115683554A (en) * | 2021-07-29 | 2023-02-03 | 横河电机株式会社 | Optical fiber characteristic measuring system |
| CN116175208A (en) * | 2023-03-16 | 2023-05-30 | 大连三垒科技有限公司 | Automatic rotary table rotary dynamic balance adjusting device |
-
2023
- 2023-12-29 CN CN202311842954.2A patent/CN117484261B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010008086A1 (en) * | 1996-01-31 | 2001-07-19 | Colarelli Nicholas J. | Wheel balancer with control circuit and rim runout measurement |
| JP2007315924A (en) * | 2006-05-26 | 2007-12-06 | Japan Aerospace Exploration Agency | Non contact measurement of impact and impulse using magnetic force supported balance device |
| CN101192806A (en) * | 2006-11-23 | 2008-06-04 | 全汉企业股份有限公司 | A control method of transformer excitation cycle and its control circuit |
| CN101038228A (en) * | 2007-02-07 | 2007-09-19 | 北京航空航天大学 | High accuracy number online dynamic balance detecting device based on FPGA |
| CN101158614A (en) * | 2007-11-15 | 2008-04-09 | 中北大学 | High speed chief axis on-line dynamic poise device |
| CN101556200A (en) * | 2008-06-24 | 2009-10-14 | 郑州大学 | Vector spectrum based dynamic balance method for flexible rotor |
| CN101915639A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Tri-axial self-adaptive dynamic balance execution method for centrifugal machine |
| CN103487253A (en) * | 2012-06-13 | 2014-01-01 | 波音公司 | Engine vibration and engine trim balance test system, apparatus and method |
| TWM449055U (en) * | 2012-10-12 | 2013-03-21 | Goodway Machine Corp | Dynamic balance computing device for spindle of machine tool |
| CN103105266A (en) * | 2013-01-16 | 2013-05-15 | 东南大学 | Dynamic balance method of bending moment of rotating mechanical rotor biplane |
| US20190178765A1 (en) * | 2017-12-12 | 2019-06-13 | Imam Abdulrahman Bin Faisal University | Combined ultrasonic pulse velocity and schmidt hammer rebound test for non-destructive evaluation |
| CN111113130A (en) * | 2018-10-30 | 2020-05-08 | 四川省兴文县经久精密制造有限责任公司 | Active balance control system for high-speed electric spindle |
| CN115683554A (en) * | 2021-07-29 | 2023-02-03 | 横河电机株式会社 | Optical fiber characteristic measuring system |
| CN115673874A (en) * | 2022-12-30 | 2023-02-03 | 北京精雕科技集团有限公司 | Method and device for detecting maneuvering balance of numerical control machine turntable |
| CN116175208A (en) * | 2023-03-16 | 2023-05-30 | 大连三垒科技有限公司 | Automatic rotary table rotary dynamic balance adjusting device |
Non-Patent Citations (3)
| Title |
|---|
| 张晓东;张江锋;李济顺;: "轴承沟道磨床的砂轮自动平衡方法及***的实现", 组合机床与自动化加工技术, no. 04, 25 April 2006 (2006-04-25), pages 21 - 24 * |
| 薛晓宁: "碟式分离机双测点整机全速动平衡研究", 试验技术与试验机, vol. 38, no. 1, 31 December 1998 (1998-12-31), pages 22 - 25 * |
| 黄强，邓萌，钟开英: "精密卧式加工中心空间误差的建模、测量与补偿技术", 机床与液压, vol. 49, no. 15, 31 August 2021 (2021-08-31), pages 87 - 92 * |
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