JP2007278955A - Analyzer for rotation vibration signal of rolling bearing, and rolling bearing manufacturing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an analyzer of rotation vibration signals of a rolling bearing, permitting easy obtaining of the shape errors of component parts from a bearing oscillation waveform, without high level knowledge regarding influence due to the shape errors of the component parts acting on oscillation of the rolling bearing, thus giving expectation for improvement in the quality of bearing manufacturing and improvement in the estimated accuracy in the diagnosis of bearing abnormality. <P>SOLUTION: A measured signal input means 4 is provided for inputting a measured signal given, by measuring bearing oscillation due to a rotation swing of the rolling bearing 2. A condition storage means 5 is provided for storing operation conditions, internal specifications and measurement conditions of the rolling bearing 2. An analysis means 7 is provided for computing component part shape errors as one among the values of swelling of an inner ring raceway surface of the rolling bearing 2, swelling of an outer ring raceway surface, swelling of a rolling element, and the magnitude of the mutual of difference in the diameter of the rolling element from the measured signal input in the measured signal input means 4 in accordance with predetermined analysis rules 6, in response to the operating conditions, internal specifications and measurement conditions stored in the condition storage means 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotational runout signal analyzing apparatus for analyzing a rotational runout signal of a rolling bearing to obtain a shape error of a bearing component, and a rolling bearing production system using the same.

Both the frequency and the amplitude ratio of the influence of the components of the rolling bearing on the rotational accuracy of the bearing have been clarified (for example, non-patent literature).
By utilizing the relationship between the above-described bearing vibration and the shape error of a single component under the target operating conditions, a change in the vibration amplitude value of a specific frequency that occurs for each component is observed. Has been proposed (for example, Patent Document 1 “Acoustic Inspection Device for Rolling Bearings”).

Or, in the diagnosis of the life or abnormality of a rolling bearing in a machine with rotation, the bearing vibration frequency component due to the shape error of the components of the rolling bearing described above appears as an amplitude modulation component of the resonance frequency including the measurement sensor. It is proposed to perform a frequency analysis after envelope processing of the measured vibration waveform using the above and determine the bearing replacement time from the magnitude of this amplitude modulation component (for example, Patent Document 2 “Mechanical equipment or Device abnormality diagnosis method and apparatus ")).
JP 2000-171351 A JP 2003-232674 A Tomoya Sakaguchi, Yoshinobu Akamatsu, “Ball Bearing Vibration Simulation”, NTN TECHNICAL JOURNAL, No69, 2001, P69-75)

  In the methods of Patent Documents 1 and 2 above, it is possible to specify which component is the abnormal vibration of the bearing or the component with poor accuracy. However, the accuracy of the component is specified by the above theoretical component. It is necessary to carry out conversion using the relationship between the accuracy of the bearing and the vibration of the bearing, or to disassemble the bearing into components and measure it.

In order to calculate the shape error of the component parts, for example, the amplitude of the waviness of the inner ring raceway surface, the direction of the sensor differs between the axial direction and the radial direction as in Non-Patent Document 1 “Ball bearing vibration simulation”, and Different between inner ring rotation and outer ring rotation. Further, it is necessary to grasp not only the frequency but also the conversion coefficient to the shape error with respect to the vibration amplitude, and convert it into the absolute value of the shape error.
Thus, the conversion from the vibration amplitude to the shape error amplitude needs to grasp all the various factors that affect the rotation accuracy of the rolling bearing. Also, when actually performing the conversion work, determine the frequency in question from the bearing operating conditions and measurement conditions, find the amplitude, and finally convert it to the shape error of the bearing component using the amplitude ratio. The procedure to do is necessary. Therefore, it is a difficult and time-consuming work.

The object of the present invention is to easily obtain the shape error of the component from the bearing vibration waveform without the advanced knowledge about the influence of the shape error of the component on the vibration of the rolling bearing. It is an object of the present invention to provide a rolling bearing runout signal analyzer that can be expected to improve manufacturing quality and to improve bearing accuracy diagnosis estimation accuracy.
Another object of the present invention is to provide a rolling bearing production system capable of improving the bearing manufacturing quality using the rotational shake signal analyzing apparatus.

The rolling bearing rotational vibration signal analyzing apparatus (1) of the present invention includes a measurement signal input means (4) for inputting a bearing vibration measurement signal due to rotational vibration of the rolling bearing (2), and operating conditions of the rolling bearing (2). , Condition storage means (5) for storing the internal specifications and measurement conditions, and the measurement signal input means (in accordance with the operating conditions, internal specifications and measurement conditions stored in the condition storage means (5)) 4) From the measurement signal input to 4), at least one of the swell of the inner ring raceway surface, the swell of the outer ring raceway surface, the swell of the rolling element, and the diameter difference between the rolling elements of the rolling bearing (2). Analyzing means (7) for calculating a component part shape error as a value according to a predetermined analysis rule (6).
According to this configuration, according to the operating conditions, internal specifications and measurement conditions stored in the condition storage means (5), from the measurement signal, the inner ring raceway swell, the outer ring raceway swell, the rolling element swell, Since the analysis means (7) for calculating the diameter difference of the rolling elements in accordance with a predetermined analysis rule is provided, even if the operator has no knowledge about the influence of the shape error of the component parts on the vibration of the rolling bearing, it is constructed from the bearing vibration waveform. The shape error of the part can be easily obtained. Thereby, improvement of bearing manufacturing quality and the estimation accuracy of bearing abnormality diagnosis can be expected.

  The measurement signal only needs to be a signal that can be converted into the displacement of the bearing vibration due to the rotational vibration of the rolling bearing (2), and is not limited to the amplitude signal that directly indicates the displacement but may be an acceleration or speed signal. Further, as the analyzing means (7), means for obtaining the shape error of the component by frequency analysis can be adopted. In this case, the analysis means (7) and the predetermined analysis rule (6) are configured as follows, for example.

  When the measurement signal is an amplitude signal of a waveform obtained by measuring the displacement of the bearing vibration, the predetermined analysis rule (6) of the analysis means is that the bearing vibration corresponding to various operating conditions, internal specifications, and measurement conditions. It is assumed that a vibration analysis table (27) defining a frequency to be analyzed in the frequency component and an amplitude ratio that is a ratio of the vibration amplitude at the analysis target frequency to the component shape error is provided. The analysis means (7) is stored in the Fourier transform means (17) for obtaining the amplitude signal for each frequency component by performing Fourier transform on the measurement signal input to the measurement signal input means, and the condition storage means (5). The operating conditions, internal specifications, and measurement conditions are collated with the vibration analysis table (27) to determine the frequency to be analyzed, and the amplitude signal for each frequency component obtained by the Fourier transform means (17) is determined. A shape error calculating means (19) for selecting the amplitude signal of the component of the frequency to be analyzed and obtaining a component part shape error corresponding to the amplitude of the selected amplitude signal with the vibration analysis table (27); It shall have.

In the rolling bearing (2), for the bearing vibration corresponding to the operating conditions, internal specifications, and measurement conditions, the relationship between the frequency to be analyzed and the amplitude ratio of the vibration amplitude at that frequency to the component shape error is as follows: This is evident in ball bearings.
Therefore, such a relationship is set in the vibration analysis table (27) as a predetermined analysis rule (6), the measurement signal is subjected to Fourier transform, and the analysis target frequency is determined by collation with the vibration analysis table (27). Then, the amplitude of the component of the determined analysis target frequency is obtained from the amplitude signal for each frequency component obtained by the Fourier transform means (17), and this amplitude is collated with the vibration analysis table (27). The component shape error can be obtained.
As described above, the vibration analysis table (27) in which the relationship between the various conditions, the analysis target frequency, and the relationship between the vibration amplitude corresponding to the frequency and the amplitude ratio of the shape error is provided, and the shape error calculating means (19) Since the determination of the frequency to be analyzed and the calculation of the shape error corresponding to the vibration amplitude are performed by collating with the vibration analysis table (27), the operator has the shape error of the component parts affecting the vibration of the rolling bearing (2). Even if there is no knowledge about the influence of the component, the shape error of the component can be obtained.

When the measurement signal is an acceleration or velocity signal, the analysis means (7) has the following configuration, for example. In this case, it is assumed that the vibration analysis table (27) is the same as the predetermined analysis rule (6) of the analysis means (7). The analysis means (7) has a Fourier transform means (17) and a shape error calculation means (19) as described above. In this case, the Fourier transform means (17) performs Fourier transform on the measurement signal input to the measurement signal input means (4) to obtain an acceleration or velocity signal for each frequency component. The shape error calculation means (19) collates the operating conditions, internal specifications and measurement conditions stored in the condition storage means (5) with the vibration analysis table (27) to determine the analysis target frequency, An integration process is performed to divide the signal of the determined frequency component to be analyzed by the frequency to obtain an amplitude signal, and a component part shape error corresponding to the amplitude of the amplitude signal is obtained by collating with the vibration analysis table (27). Shall.
When the measurement signal is an acceleration or velocity signal, the amplitude can be obtained by performing an integration process that divides by the frequency after the frequency analysis. Therefore, by using the same vibration analysis table (27) as described above, the shape of the component is obtained. The magnitude of the error can be calculated.

In the present invention, from the frequency analysis result of the measurement signal input to the measurement signal input means according to the operating conditions, internal specifications, and measurement conditions stored in the condition storage means (5), the inside of the rolling bearing Asynchronous shake calculation means (29) may be provided for calculating the sum of the amplitudes of all frequency components resulting from the shape error as the asynchronous rotational shake of the rolling bearing (2).
Even when measuring the asynchronous rotational runout of a single bearing, the asynchronous rotational runout of the rolling bearing (2) is calculated according to a predetermined calculation rule by frequency analysis according to the stored operating conditions, internal specifications, and measurement conditions. As a result, the asynchronous rotational shake can be calculated without detailed knowledge by the operator.

  The predetermined calculation rule of the asynchronous shake calculating means (29) is that the shake signal waveform is overwritten a plurality of times based on the rotation angle of the rotating wheel, and the maximum value and the minimum value of the overwritten waveform group in each phase are set. It is also possible to obtain all the differences and calculate the value at the phase where the difference is the maximum as the asynchronous rotational shake. When the overwriting method is used, the calculation of the asynchronous rotational shake can be performed by a simple program.

The production system of the present invention is a production system for manufacturing a rolling bearing, and the rolling shake signal analyzing device (1) of the rolling bearing having any one of the configurations of the present invention and the component shape obtained by the device (1) Means (40) for feeding back an error to a machining step in a line (31,...) For producing a component corresponding to the component shape error of the inner ring, outer ring, and rolling element of the rolling bearing (2); It is characterized by providing.
Since the rotational shake signal analyzing apparatus (1) of the present invention can automatically calculate the component shape error value, the calculated component shape error value can be fed back to the machining process. The bearing manufacturing quality can be improved.

The rolling bearing rotational vibration signal analyzing apparatus of the present invention includes a measurement signal input means for inputting a bearing vibration measurement signal due to the rotational vibration of the rolling bearing, and conditions for storing the operating conditions, internal specifications, and measurement conditions of the rolling bearing. From the measurement signal input to the measurement signal input means according to the operating conditions, internal specifications and measurement conditions stored in the storage means, the swell of the inner ring raceway surface of the rolling bearing, the outer ring The rolling bearing comprises: an analyzing means for calculating a component shape error, which is at least one of the swell of the raceway surface, the swell of the rolling element, and the size of the diameter difference between the rolling elements, according to a predetermined analysis rule. Even if there is no knowledge about the effect of the shape error of the component on the vibration of the bearing, the shape error of the component can be easily obtained from the bearing vibration waveform. Thereby, improvement of bearing manufacturing quality and the estimation accuracy of bearing abnormality diagnosis can be expected.
A rolling bearing production system according to the present invention includes a rolling runout signal analyzing device for a rolling bearing according to the present invention and a component shape error obtained by the device, the configuration of the inner ring, outer ring, and rolling element of the rolling bearing. Means for feeding back to a machining process in a line for manufacturing a component corresponding to a part shape error, the rotational shake signal analyzer of the present invention can be used to improve bearing manufacturing quality.

  A first embodiment of the present invention will be described with reference to FIGS. The rolling bearing runout signal analyzing apparatus 1 includes a computer and a numerical processing program executed by the computer, and includes the following units.

  This rotational shake signal analyzing apparatus 1 includes a measurement signal input means 4 for inputting a measurement signal a having a waveform obtained by measuring the displacement of the rotational shake of the rolling bearing 2, and operating conditions, internal specifications, and measurement conditions of the rolling bearing 2. The condition storage means 5 to be stored and the inner ring of the rolling bearing 2 from the measurement signal a input to the measurement signal input means 4 according to the operating conditions, internal specifications and measurement conditions stored in the condition storage means 5 Analyzing means for calculating a component part shape error, which is at least one of the swell of the raceway surface, the swell of the outer ring raceway surface, the swell of the rolling element, and the diameter difference between the rolling elements, according to a predetermined analysis rule 6. 7. In addition, the waviness of a raceway surface means that it is uneven | corrugated to radial direction in each part of the circumferential direction of a raceway surface.

  The rolling bearing 2 is, for example, a ball bearing such as a deep groove ball bearing shown in FIG. The rolling elements 10, a cage 11 that holds the rolling elements 10, and a seal 12 that seals both ends of the bearing space between the inner and outer rings 8 and 9 are configured.

  In FIG. 1, the rotational runout measuring means 3 measures, for example, a displacement of a radial runout of the outer ring by a displacement sensor (not shown) as outer ring fixation and inner ring rotation, and means for fixing the outer ring of the rolling bearing 1, It comprises the means for rotating the inner ring and the displacement sensor facing the peripheral surface of the outer ring. For example, a capacitance type displacement sensor is used as the displacement sensor.

  The analog measurement signal a which is the output of the displacement sensor of the rotational shake measuring means 3 is converted into a digital signal by the AD converting means 13 and then input to the measurement signal input means 4 of the rotational shake signal analyzing apparatus 1. The measurement signal a converted into a digital signal is temporarily stored as a data file in the rotational shake displacement measurement result storage means 13 outside the rotational shake signal analyzer 1 as shown in FIG. 2, and the data file is transferred. Then, it may be read by the measurement signal input means 4. Further, the measurement signal a may be input to the measurement signal input unit 4 as an analog signal, but in this case, the signal input to the measurement signal input unit 4 is digitally input to the rotational shake signal analyzer 1. AD conversion means 14 for converting the signal is provided.

The measurement signal input means 4 is either an input port for a digital signal, an input means for a data file, or an input port for an analog signal, or a plurality of types of these can be selectively used. It is said.
The measurement signal a output from the rotational shake measuring means 3 is not limited to an amplitude signal, but may be a speed or acceleration signal. In this embodiment, the measurement signal a measures the displacement of the rotational shake of the rolling bearing 2. A case where the amplitude signal is the same will be described.

The analysis unit 7 is a unit that calculates a shape error by frequency analysis, and includes a Fourier transform unit 17 and a shape error calculation unit 19. The measurement signal a is discretized and quantized by the AD conversion means 14 and input from the measurement signal input means 4 to the Fourier transform means 17. When the measurement signal a is input as an analog signal to the measurement signal input means 4, it is converted into a digital signal by the AD conversion means 14 inside the rotational shake signal analyzer 1 and input to the Fourier conversion means 17.
The Fourier transform means 17 is a means for converting into an amplitude signal for each frequency component. Here, a pre-processing means 18 for improving the S / N ratio, such as a window function or a band-pass filter, may be provided before the Fourier transform means 17.

  The condition storage means 5 stores the operating conditions, measurement conditions, and bearing specifications of the rolling bearing 2 as described above. The operating conditions are, for example, distinction between inner ring rotation and outer ring rotation, rotation speed, and the like. The bearing specifications are values that can be used to determine the rotation speed and revolution speed of the rolling element, such as the pitch circle diameter, rolling element diameter, and contact angle. The measurement conditions are the direction of the sensor for detecting the bearing vibration of the rotational vibration displacement measuring means 3 (differentiation between the axial direction and the radial direction), the type of the sensor (displacement / speed / acceleration, conversion coefficient of voltage with respect to the physical quantity of the sensor), etc. is there. These conditions are input from the condition input means 16 in advance. The condition input means 16 may be an input means by an operator such as a keyboard, or may be an external data reading means.

  The predetermined analysis rule 19 of the analysis means 7 is defined by a vibration analysis table 27. The vibration analysis table 27 is included in frequency components of bearing vibration corresponding to various operating conditions, internal specifications, and measurement conditions. The frequency to be analyzed and the amplitude ratio that is the ratio of the vibration amplitude at the frequency to be analyzed to the component shape error are defined.

  The shape error calculation means 19 collates the operating conditions, internal specifications, and measurement conditions stored in the condition storage means 5 with the vibration analysis table 27 defined in the predetermined analysis rule 19 to determine the analysis target frequency. The frequency component selection unit 20 for selecting the amplitude signal of the component of the frequency to be analyzed among the amplitude signals for each frequency component obtained by the Fourier transform means 17, and the configuration corresponding to the amplitude of the selected amplitude signal The shape error calculating unit 21 is configured to obtain a component shape error by collating with the vibration analysis table 27.

The vibration analysis table 27 may be any table as long as the result of vibration simulation or the result of vibration measurement is summarized and the component shape error shape corresponding to the amplitude ratio of the specific frequency is indicated according to the various conditions. If a specific example is given, when the rolling bearing 2 is a ball bearing, it will be shown in Table 1.
This Table 1 is a table shown in the above-mentioned Non-Patent Document 1, and for a ball bearing, a vibration simulation calculated by replacing the non-linear contact in the elastic contact portion between the rolling element and the raceway surface with a virtual wire spring. The results are summarized and the relationship between the shape error and vibration of the components in ball bearings with inner ring rotation and outer ring stationary is shown. In the case of outer ring rotation, another table (not shown) is used.

In Table 1, each variable or constant indicates the following.
f _b : Ball rotation frequency, Hz
f _c : rotation frequency of cage, Hz
f _i : Relative rotation frequency of inner ring with respect to cage (f _r −f _c ), Hz
f _r : Inner ring rotation frequency, Hz
n: Arbitrary natural number Z: Number of rolling elements (balls) α: Contact angle

The calculation method using Table 1 will be explained. When the waviness of the inner ring raceway is obtained from the vibration measurement result in the radial direction, the frequency to be analyzed for vibration is nZf _i ± f _r and f _i (relative of the inner ring to the cage). since the rotation frequency) is f _r -f _c, it is the inner ring rotation, which is the conditions used in Table 1, the other direction of the sensor, n, Z, f _c, may know the value of f _r.
Of these, the inner ring rotation is known from the bearing operating conditions, and the sensor direction is known from the measurement conditions. Z (the number of balls) is determined from the bearing specifications, and f _c (rotation frequency of the cage) and f _r (inner ring rotation frequency) are determined from the rotational speed and the bearing specifications under the operating conditions. n is an arbitrary natural number, and which value is set in the frequency component selection unit 20 as appropriate.
Thus, the frequency component selection unit 20 determines the frequency to be analyzed from Table 1 which is the vibration analysis table 27.

  The shape error calculation unit 21 calculates the amplitude value of the vibration of the frequency component determined by the frequency component selection unit 20 as described above from the amplitude signal for each frequency component obtained by the Fourier transform unit 17 as shown in Table 1. Divide by the corresponding amplitude ratio (“1” in the above calculation method example) to determine the waviness of the inner ring track.

  The shape error calculation means 19 uses Table 1 in the same manner as described above to obtain the swell of the outer ring raceway, the ball diameter error, and the swell of the ball in addition to the swell of the inner ring raceway. The shape error calculating means 19 may not necessarily obtain all of these component part shape errors, such as the inner ring raceway swell, outer ring raceway swell, ball diameter error, and ball swell. Anything that seeks one is acceptable.

  Since the vibration frequency may be slightly different from the calculated value depending on the radial internal clearance of the bearing and the load, the frequency component selecting unit 20 of the shape error calculating means 19 has a frequency near the calculated frequency. A spectrum peak detection function may be provided, and the shape error may be calculated by the shape error calculation unit 21 using the amplitude obtained as a representative value.

  The shape error calculation means 19 outputs the error thus obtained to the screen display device 24 such as a liquid crystal display device or a cathode ray tube by the output means 23.

  The determination unit 22 is a unit that compares the calculation result such as the waviness of the inner ring raceway, which is the output of the shape error calculation unit 21 of the shape error calculation unit 19, with a set value to determine whether there is an abnormality. For example, when the swell of the selected inner ring raceway exceeds a threshold value, it is determined that it is abnormal. Alternatively, a plurality of thresholds are set, and a value less than the first threshold is determined as a recommended range, a value exceeding the first threshold, a range requiring attention until the second threshold, and a second threshold abnormality determined as an abnormal range It is also good.

  The calculation result of the shape error by the shape error calculation unit 19 and the determination result of the determination unit 22 are displayed on the display unit 24 by the output unit 23 and stored in the analysis result storage unit 25. Alternatively, it may be transferred to the processing equipment 26 and used as a feedback signal for adjusting each part in the processing equipment 26.

  According to the rotational shake signal analyzing apparatus having this configuration, the inner ring raceway swell, the outer ring raceway surface, and the like from the measurement signal in accordance with the operating conditions, internal specifications, and measurement conditions stored in the condition storage unit 5 as described above. The analysis means 7 for calculating the undulation of the rolling element, the undulation of the rolling element, the difference between the diameters of the rolling elements, etc. according to a predetermined analysis rule is provided. Even without it, the shape error of the component can be easily obtained from the bearing vibration waveform. Further, the shape error of the bearing component can be obtained without performing various conversions and complicated operations such as disassembling and measuring the bearing component. Thereby, improvement of bearing manufacturing quality and the estimation accuracy of bearing abnormality diagnosis can be expected.

  FIG. 3 shows another embodiment of the present invention. Although the first embodiment has been described with respect to the case where the rotational shake measuring means 3 measures the amplitude signal, the rotational shake measuring means 3 outputs a rotational shake acceleration or speed signal of the rolling bearing 2. It may be. In this case, as shown in FIG. 3, the analysis unit 7 is provided with an integration unit 28, and performs an integration process of dividing by frequency after frequency analysis. Thereby, the magnitude of the shape error of each bearing component can be calculated.

In this case, it is assumed that the predetermined analysis rule 6 of the analysis means 7 has the same vibration analysis table 27 as described above, and also has the Fourier transform means 17 and the shape error calculation means 19 as described above. However, in this case, the Fourier transform means 17 performs Fourier transform on the measurement signal input to the measurement signal input means 4 to obtain an acceleration or velocity signal for each frequency component. The shape error calculation means 19 uses the frequency component selection unit 20 to collate the operating conditions, internal specifications, and measurement conditions stored in the condition storage means 5 with the vibration analysis table 27 and determine the analysis target frequency. The integration process for dividing the determined frequency component signal to be analyzed by the frequency is performed by the integration means 28 to obtain an amplitude signal. The shape error calculation 27 obtains the component part shape error corresponding to the amplitude of the amplitude signal by collating with the vibration analysis table 27.
When the measurement signal is an acceleration or velocity signal, the amplitude can be obtained by performing an integration process that divides by the frequency after the frequency analysis. Therefore, by using the same vibration analysis table 27 as described above, the shape error of the component part can be obtained. The size can be calculated.

  FIG. 4 shows still another embodiment of the present invention. In this embodiment, an asynchronous rotational shake calculating means 29 is provided in the first embodiment shown in FIGS. Asynchronous rotational runout (so-called NRRO) is caused by manufacturing errors of various components such as the inner ring raceway swell of the rolling bearing 2 and needs to be managed below an allowable value. Asynchronous rotational shake calculation means 29 is a predetermined calculation rule by frequency analysis from the measurement signal input to measurement signal input means 4 according to the operating conditions, internal specifications, and measurement conditions stored in condition storage means 5. The means for calculating the asynchronous rotational runout of the rolling bearing 2 according to The predetermined calculation rule of the asynchronous shake calculation means 29 is to calculate the sum of the amplitudes of all the frequencies of the rotational shake caused by the shape error of the inner ring, the outer ring and the rolling element.

  In addition to the above-described method of calculating the asynchronous rotational shake of the rolling bearing by frequency analysis, a method of calculating the asynchronous rotational shake by overwriting the rotational shake waveform may be generally used. This is effective not only for determining the shape error inside the bearing but also for estimating the consistency and viscosity of the grease and the amount of dust in the lubricating oil. Since the measurement signals to be used are the same, this overwriting processing method may be provided in the processing apparatus. In the overwriting method, the phase of the rotating wheel is the horizontal axis and the vertical axis is the measurement signal, and when multiple waveforms are overwritten, the difference between the maximum value and minimum value of the overlaid waveform group at each phase. It is only necessary to have a function of calculating all of the above and calculating the value at the phase where the difference is maximum as the asynchronous rotational runout of the rolling bearing.

Next, an example of a rolling bearing production system equipped with the rolling bearing rotational vibration signal analyzer of the present invention will be described.
FIG. 5 is a block diagram showing a rolling bearing production line provided with the rotational shake signal analyzing apparatus 1. This bearing manufacturing line manufactures the rolling bearing 2 described above with reference to FIG.

  In FIG. 5, this bearing production line includes a bearing ring production line section 31, an assembly process section 32, a cleaning process section 33, a first inspection process section 34, a filling process section 35, a second inspection process section 36, and a packaging. It has the part 37 in order, and has the rolling-element preparation part 38 and the holder preparation part 39 in addition to this. The rolling element preparation unit 38 and the cage preparation unit 39 are preparation units for preparing the rolling element 10 and the cage 11 manufactured in other lines, respectively, and the production line for manufacturing the rolling element 10 and the cage 11. May be part. Although only one line portion is illustrated in the bearing ring manufacturing line section 31, two are provided, and the inner ring 8 and the outer ring 9 that are inner and outer bearing rings are manufactured in each of the bearing ring manufacturing line sections 31. The The bearing ring production line section 31 includes a material preparation section 31a for preparing a bearing ring material forged into the approximate shape of the inner ring 8 or the outer ring 9, a turning process section 31b, a heat treatment process section 31c, and a grinding process section 31d. The material of the forged product which has in order and prepared by the material preparation part 31a is turned, heat-treated, and then ground.

  The assembly process unit 12 assembles the inner ring 8 and the outer ring 9 manufactured by the bearing ring manufacturing line unit 31, and the rolling elements 10 and the cage 11 respectively prepared by the rolling element preparation unit 38 and the cage preparation unit 39, respectively. This is an assembly 2A. The assembly 2A is cleaned in the cleaning process section 33, subjected to a predetermined inspection in the first inspection process section 34, filled with grease and attached to the seal 12 in the filling process section 35, and the finished bearing. Then, the second inspection process unit 36 performs a predetermined inspection again, and the packing process unit 37 packs it.

  Each of the inspection process units 34 and 36 includes the rotational shake signal analyzing apparatus 1 of the embodiment shown in FIGS. 1 and 2, and the assembly 2 </ b> A is used as a rolling bearing 2 in a state where no seal is attached and a finished product. Inspect the sound in a wet state. In addition, each inspection process unit 34, 36 discharges the assembly 2A determined to be defective as a result of non-defective product conveyance path as a result of determining whether the rotational shake signal analyzing apparatus 1 or another output is good by another determination means. It has sorting process parts 34a and 36a. The sorting process units 34a and 36a may be provided as a process immediately after the inspection process units 34 and 36, or may be omitted.

The shape error value that is the output of the rotational shake signal analyzer 1 provided in each inspection process section 34, 36 is fed back by the feedback means 40 to the production line of the bearing component having the shape error. For example, the roundness (that is, the waviness of the raceway surface) and the difference in diameter of the inner ring 8 or outer ring 9 obtained by the rotational shake signal analyzer 1 are fed back to the corresponding parts machining process, for example, a grinding process section It is used for controlling the number of times of the dressing device 40 of the grinding machine constituting 31d, maintenance and replacement of the grinding fluid, or maintenance of the grinding machine.
By feeding back the shape error to the machining process in this way, a highly accurate bearing component can be manufactured.

It is a block diagram which shows the conceptual structure of the rotational shake signal analyzer of the rolling bearing which concerns on 1st Embodiment of this invention. It is a block diagram which shows the specific structure of the rotational shake signal analyzer. It is a block diagram which shows the structure of the rotational shake signal analyzer of the rolling bearing which concerns on other embodiment of this invention. It is a block diagram which shows the structure of the rotational shake signal analyzer of the rolling bearing which concerns on further another embodiment of this invention. It is a block diagram of a conceptual structure which shows the production system of a rolling bearing provided with the rotational shake signal analyzer of the rolling bearing which concerns on embodiment of FIG. It is sectional drawing which shows an example of the rolling bearing used as the analysis object of the rotational shake signal analyzer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotary shake signal analyzer 2 ... Rolling bearing 3 ... Rotary shake measuring means 4 ... Measurement signal input means 5 ... Condition storage means 6 ... Predetermined analysis rule 7 ... Analyzing means 13, 14 ... AD converting means 17 ... Fourier transform means 18 ... shape error calculation means 20 ... frequency component selection section 21 ... shape error calculation section 26 ... machining equipment 27 ... vibration analysis table 28 ... integration means 29 ... asynchronous shake calculation means 40 ... feedback means

Claims (6)

  Measurement signal input means for inputting a measurement signal obtained by measuring bearing vibration due to rolling vibration of the rolling bearing, condition storage means for storing the operating conditions, internal specifications, and measurement conditions of the rolling bearing, and stored in the condition storage means From the measurement signal input to the measurement signal input means according to the operating conditions, internal specifications, and measurement conditions, the swell of the inner ring raceway surface, the swell of the outer ring raceway surface, the swell of the rolling element, and An apparatus for analyzing a rotational vibration signal of a rolling bearing, comprising: analysis means for calculating a component shape error, which is at least one value of a difference in diameter of rolling elements, according to a predetermined analysis rule.   2. The bearing according to claim 1, wherein the measurement signal is an amplitude signal having a waveform obtained by measuring a displacement of a bearing vibration, and the predetermined analysis rule of the analysis means corresponds to various operating conditions, internal specifications, and measurement conditions. A vibration analysis table that defines a frequency to be analyzed in a frequency component of vibration and an amplitude ratio that is a ratio of a vibration amplitude at the analysis target frequency to the component shape error; and the analysis means includes the measurement Fourier transform means for obtaining an amplitude signal for each frequency component by performing Fourier transform on the measurement signal input to the signal input means, and the vibration analysis table indicating the operating conditions, internal specifications, and measurement conditions stored in the condition storage means. To determine the analysis target frequency, and select the amplitude signal of the determined analysis target frequency component from the amplitude signal for each frequency component obtained by the Fourier transform means. To a component shape errors corresponding to the amplitude of the selected amplitude signal, rotational deflection signal analyzer of a rolling bearing having a shape error calculating means for determining by matching with the vibration analysis table.   2. The bearing signal according to claim 1, wherein the measurement signal is an acceleration or velocity signal, and the predetermined analysis rule of the analysis means includes various operating conditions, internal specifications, and frequency components of bearing vibration corresponding to the measurement conditions. A vibration analysis table that defines a frequency to be analyzed and an amplitude ratio that is a ratio of the vibration amplitude at the analysis target frequency to the component shape error, and the analysis means is input to the measurement signal input means Fourier transform means for obtaining the acceleration or velocity signal for each frequency component by performing Fourier transform on the measured signal, and comparing the operating conditions, internal specifications and measurement conditions stored in the condition storage means with the vibration analysis table. The frequency to be analyzed is determined and integration processing is performed to divide the signal of the determined frequency component to be analyzed by the frequency to obtain an amplitude signal. Components shape errors corresponding to the width, rotational deflection signal analyzer of a rolling bearing having a shape error calculating means for determining by matching with the vibration analysis table.   The frequency analysis of the measurement signal input to the measurement signal input means according to any one of claims 1 to 3, in accordance with the operating conditions, internal specifications, and measurement conditions stored in the condition storage means. A rolling vibration signal analyzing apparatus for a rolling bearing provided with asynchronous vibration calculating means for calculating the sum of the amplitudes of all frequency components resulting from the shape error inside the rolling bearing as the asynchronous rotational vibration of the rolling bearing.   5. The predetermined calculation rule of the asynchronous shake calculation means according to claim 4, wherein the shake signal waveform is overwritten a plurality of times based on the rotation angle of the rotating wheel, and the maximum value and minimum value of the overwritten waveform group at each phase are overwritten. A rolling runout signal analysis device for a rolling bearing that calculates all the difference in values and calculates a value at a phase where the difference is maximum as an asynchronous runout of rotation. 6. A production system for manufacturing a rolling bearing, wherein the rolling runout signal analyzing apparatus according to any one of claims 1 to 5 and a component part shape error obtained by the apparatus are used as an inner ring of the rolling bearing. A rolling bearing production system comprising: an outer ring; and a means for feeding back to a machining process in a line for producing a component corresponding to the component shape error of the rolling element.

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