JP5882099B2 - Rolling bearing device manufacturing apparatus and rolling bearing device manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a rolling bearing device.

  Conventionally, a manufacturing method for manufacturing a rolling bearing device used in a magnetic recording device (HDD) or the like is known (see, for example, Patent Document 1 and Patent Document 2). In the manufacturing method of a rolling bearing device described in Patent Document 1, an anaerobic adhesive is applied between an inner ring and a shaft (rotating shaft), the shaft is fitted to the inner ring, and a constant load is applied to the inner ring by a weight. The inner ring and the shaft are joined by holding the adhesive while it is cured while it is added.

  In addition, the manufacturing method of the rolling bearing device described in Patent Document 2 pushes the inner ring into the shaft while measuring the resonance frequency with respect to the rolling bearing device in which the inner ring and the shaft (shaft) are fixed by press-fitting, and the resonance frequency is constant. Preload is applied to become.

JP 2000-346085 A Japanese Patent Laid-Open No. 2003-239956

  However, the method of manufacturing a rolling bearing device described in Patent Document 1 has a disadvantage that it takes time to wait until the adhesive is cured, resulting in poor mass productivity. Moreover, in the manufacturing method of the rolling bearing device described in Patent Document 2, distortion occurs in the manufacturing device that fixes the inner ring by pushing the inner ring in the press-fitted state, and the inner ring is pushed excessively due to the influence of the distortion. There is a problem that excessive preload is applied to the rolling bearing. Furthermore, there is a problem in that torque variation occurs due to individual differences in the radial play of the rolling bearing and the curvature of the raceway.

  The present invention has been made in view of the above-described circumstances, and is a manufacturing apparatus capable of manufacturing a rolling bearing device that is appropriately preloaded by reducing torque variation in a short time, and a rolling bearing device. An object is to provide a manufacturing method.

In order to achieve the above object, the present invention provides the following manufacturing method and a manufacturing apparatus for realizing the manufacturing method.
In the present invention, the inner ring is rotated about the axis with respect to the outer ring of the rolling bearing assembly in which the shaft member is fitted in the inner ring of the two rolling bearings arranged coaxially with an interval in the axial direction. A rotation step for applying a command signal to the actuator so as to release the pressure after pressing the inner ring in the axial direction, and the rotation of the actuator causes the outer ring to rotate about the axis by the rotation step. A pushing process of pushing the inner rings in a direction in which the inner rings are close to each other in the axial direction, and when the inner ring is rotated by the pushing process while rotating with respect to the outer ring, A torque measurement step for measuring the torque transmitted to the motor, and a determination step for determining whether or not a difference between the torque measurement value measured by the torque measurement step and the target value is equal to or less than a predetermined threshold value. When the determination step determines that the difference is equal to or less than the predetermined threshold, the rotation of the inner ring by the rotation step and the pushing of the inner ring by the pushing step are terminated, and the difference is Provided is a method of manufacturing a rolling bearing device that, when determined to be larger than the predetermined threshold value, increases the maximum value of the command signal based on the measured torque value and the target value, and returns to the pushing step. .

  According to the present invention, the inner rings and the outer ring are brought into contact with the rolling elements without any gaps by bringing the inner rings close to each other in the axial direction by the pushing process, and preload is applied to the two rolling bearings. Further, when the determination step determines that the difference between the measured torque value transmitted from the rotating inner ring to the outer ring and the target value is equal to or less than a predetermined threshold value, the rotation step and the pushing step are terminated. The inner ring is positioned in a state where a preload is applied to the two rolling bearings, and the inner ring and the shaft member are press-fitted and fixed. On the other hand, when it is determined that the difference is larger than the predetermined threshold value, the maximum value of the command signal is increased and returned to the pushing process, so that the displacement amount of the actuator is increased by the increment of the command signal by the pushing process. Is increased, the inner ring is pushed further, and the position of the inner ring is readjusted so that a desired torque is obtained. Therefore, there is no need for a waiting time until the adhesive is cured as in the case where the inner ring and the shaft member are fixed by an adhesive, and there is no influence of individual differences in radial play or raceway curvature.

  In this case, by displacing the actuator so as to release the pressure after pressing the inner ring, it is possible to prevent the strain from accumulating in the manufacturing apparatus that fixes the inner ring by pushing the inner ring into the shaft member in the press-fitted state. As a result, it is possible to prevent the inner ring from being excessively pushed due to the influence of the distortion of the manufacturing apparatus and to apply excessive preload to the rolling bearing, and it is possible to manufacture a rolling bearing apparatus with little torque variation in a short time.

In the above invention, the command signal may be calculated by the following expressions (1) and (2).
ΔV = A × (TG−TA) (1)
V _n = V _n-1 + ΔV (2)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.

With this configuration, when the target value and the torque measurement value are far from each other, the increase in the displacement of the actuator is increased to increase the inner ring pushing amount, while the target value and the torque measurement value are close to each other. The amount of increase in the displacement of the actuator can be reduced to reduce the pushing amount of the inner ring. Thereby, a rolling bearing device with little variation in average torque can be manufactured in a short time. Incidentally, for fitting the inner ring and the shaft member in a pressed-in condition, increase in preload it is irreversible, [Delta] V does not change the preload amount by lowering the V _n when negative.

In the above invention, the command signal may be calculated by the following equations (3) and (4).
ΔV = A × ((TG−TA) / TG) ^m (3)
V _n = V _n-1 + ΔV (4)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.

  With this configuration, when the target value and the torque measurement value are separated from each other, the increase in displacement of the actuator is increased to increase the inner ring pushing amount, while the target value and the torque measurement value are close to each other. Then, the increase in displacement of the actuator can be made smaller to reduce the amount of pushing of the inner ring, and a rolling bearing device with less variation in average torque can be manufactured in a shorter time.

Moreover, in the said invention, it is good also as changing the waveform of the said command signal into a rectangular wave shape.
With this configuration, the displacement amount of the actuator can be efficiently transmitted to the inner ring, and the inner ring can be pushed in with high efficiency. In addition, the inner ring can be pushed in with a large amount of energy.

Moreover, in the said invention, it is good also as changing so that it may return to an initial value at a stretch after raising the waveform of the said command signal with progress of time.
By configuring in this way, compared with the case where the waveform of the command signal is changed to a rectangular wave shape, the impact between the raceway of the inner ring and the outer ring and the rolling elements is reduced, and spike-like torque fluctuations are generated. Can be prevented. As a result, it is possible to manufacture a rolling bearing device with few read / write errors when mounted on a hard disk.

In the above invention, the waveform of the command signal may be changed to a sine wave shape.
By configuring in this way, compared with the case where the waveform of the command signal is changed to a rectangular wave shape, the impact between the raceway of the inner ring and the outer ring and the rolling elements is reduced, and spike-like torque fluctuations are generated. Can be prevented. As a result, it is possible to manufacture a rolling bearing device with few read / write errors when mounted on a hard disk.

Moreover, in the said invention, it is good also as changing the said command signal with the waveform shape | molded by the following Formula (5), (6).
ΔP = (V _n −P _n−1 ) × A (5)
P _n = P _n-1 + ΔP (6)
Here, ΔP is the increment of the command signal value, and P _n is the command signal value.

  By configuring in this way, the displacement of the actuator can be compared with the case where the waveform of the command signal is increased with the passage of time and then changed to a waveform that returns to the initial value at once, or is changed to a sine waveform. The inner ring can be pushed in with a displacement close to the maximum value. Further, the impact of the raceway of the inner ring and the outer ring and the rolling elements can be mitigated, and the occurrence of spike-like torque fluctuations can be prevented. Therefore, it is possible to manufacture a rolling bearing device with few read / write errors when mounted on a hard disk.

In the present invention, the inner ring is rotated about the axis with respect to the outer ring of the rolling bearing assembly in which the shaft member is fitted in the inner ring of the two rolling bearings arranged coaxially with an interval in the axial direction. And a first command signal that causes the first actuator to be displaced so as to release the pressure after pressing the inner ring in the axial direction, and the displacement of the first actuator causes the rotation to be performed on the outer ring by the rotation step. A first pushing step of pushing the inner ring rotated around the axis in a direction in which the inner rings are close to each other in the axial direction, and pushing the first actuator in the axial direction with respect to the second actuator A second command signal is applied to cause the inner ring to be displaced, and the second actuator pushes the inner ring in the axial direction together with the first actuator simultaneously with the first pushing step by the displacement of the second actuator. And write process, when the inner ring by the first pushing means and the second pushing means is rotated relative to the outer ring while pushed, the torque transmitted from the inner race to the outer race, as measured by the load cell, the torque A torque measuring means for calculating a measured value, and a determining step for determining whether or not a difference between the torque measured value calculated by the torque measuring step and the target value is equal to or less than a predetermined threshold value. When the difference is determined to be equal to or less than the predetermined threshold value, the rotation of the inner ring by the rotation step and the pushing of the inner ring by the first pushing means and the second pushing means are finished, and the difference is the prescribed value. If it is determined to be greater than the threshold value, producing a rolling bearing device back to the second pushing step increases the second command signal based on the target value and the torque measurement value It is the law.

  According to the present invention, the inner ring and the outer ring are brought into contact with the rolling elements without any gap by the first pushing process and the second pushing process, and the two rolling bearings are preloaded. When it is determined in the determination step that the difference between the measured value of the torque transmitted from the inner ring to the outer ring and the target value is equal to or less than the threshold value, the inner ring is positioned in a state in which preload is applied to the two rolling bearings. The inner ring and the shaft member are press-fitted and fixed. On the other hand, when it is determined that the difference is larger than the threshold value, the process is returned to the pushing process, the displacement amount of the second actuator is increased by the amount of the increase in the second command signal, the inner ring is pushed further, and the desired torque is obtained. The position of the inner ring is readjusted to obtain. Therefore, there is no need for a waiting time until the adhesive is cured as in the case where the inner ring and the shaft member are fixed by an adhesive, and there is no influence of individual differences in radial play or raceway curvature.

  In this case, when the first actuator and the inner ring are pushed in the axial direction by the displacement of the second actuator, the first actuator is displaced so as to release the pressure after pressing the inner ring, so that the inner ring is pressed into the shaft member in the press-fitted state. By pushing in, it is possible to prevent distortion from being accumulated in the manufacturing apparatus for fixing the inner ring, and it is possible to prevent the inner ring from being pushed in excessively due to the influence of the distortion and applying excessive preload to the rolling bearing.

  Further, while changing the first command signal with a constant waveform for the first actuator, the second command signal applied to the second actuator is increased by the additional pushing amount, and the inner ring is moved in the axial direction. The maximum displacement amount to be pushed in can be controlled. Therefore, the waveform of the command signal for driving the first actuator and the second actuator can be calculated easily and in a short time. As a result, it is possible to manufacture a rolling bearing device in which the time required for the indentation process is shortened, torque variation is reduced, and preload is appropriately applied.

In the above invention, the waveform of the first command signal may be changed to a rectangular wave shape, a sine wave shape, or a wave shape that rises with time and returns to the initial value all at once.
By configuring in this way, compared with the case where a command signal that changes in a rectangular wave shape is applied to the first actuator, the impact between the raceway of the inner ring and the outer ring and the rolling elements is reduced, and the spike-like shape is reduced. Torque fluctuations can be prevented from occurring.

In the above invention, the second command signal is calculated from the command signal calculated by the following equations (7), (8) or the following equations (8), (9): It may be a value obtained by subtracting a value corresponding to the difference from the maximum value.
ΔV = A × (TG−TA) (7)
V _n = V _n-1 + ΔV (8)
ΔV = A × ((TG−TA) / TG) ^m (9)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.

  With this configuration, when the target value and the torque measurement value are separated from each other, the amount of increase in the displacement of the second actuator is increased to increase the inner ring pushing amount, while the target value and the torque measurement value are When the distance becomes close, the amount of increase in displacement of the second actuator can be made smaller to reduce the pushing amount of the inner ring, and a rolling bearing device with less variation in average torque can be manufactured in a short time.

Moreover, in the said invention, it is good also as including the adhesive agent application process of apply | coating an adhesive agent between the said inner ring | wheel and the said shaft member before the said rotation process.
With this configuration, the inner ring and the shaft member are bonded to each other when the adhesive is cured in a state where the inner ring is fixed to the shaft member by press-fitting at the position where the inner ring is pushed. Therefore, it is possible to more firmly fix the inner ring and the shaft member with the adhesive while maintaining the preloaded state in a short time.

The invention further includes a welding step of laser welding the inner ring and the shaft member pushed in the axial direction after the inner ring is rotated by the rotation step and the inner ring is pushed by the pushing step. It is good.
By comprising in this way, an inner ring | wheel and a shaft member are joined by laser welding in the state fixed to the shaft member by press-fitting in the position where the inner ring was pushed. Therefore, it is possible to more firmly fix the inner ring and the shaft member by laser welding while maintaining the preloaded state in a short time.

  By the way, in the above, the inner ring is rotated around the axis, and the inner ring rotated with respect to the outer ring is pushed in the direction in which the inner rings are close to each other in the axial direction, while the inner ring is pushed. A torque measurement step was taken to measure the torque transmitted from the inner ring to the outer ring when rotating with respect to the outer ring, but conversely, the outer ring was rotated so that the outer rings were axially aligned with each other. A method of measuring the torque transmitted from the outer ring to the inner ring when the outer ring rotates with respect to the inner ring while pushing the outer ring in a direction close to each other is also effective.

  According to the present invention, it is possible to produce a rolling bearing device in which torque variation is reduced and preload is appropriately applied in a short time.

It is a longitudinal cross-sectional view of the rolling bearing apparatus manufactured by the manufacturing method of the rolling bearing apparatus which concerns on 1st Embodiment of this invention. It is a flowchart explaining the manufacturing method of the rolling bearing apparatus which concerns on 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the manufacturing apparatus used for the manufacturing method of FIG. It is a block diagram of the control apparatus of FIG. It is a figure which shows the relationship between a torque measurement value and a command signal. It is a figure which shows the waveform of the command signal applied to an actuator with the manufacturing method which concerns on the 2nd modification of 1st Embodiment of this invention. It is a figure which shows the waveform of the command signal applied to an actuator with the manufacturing method which concerns on the 3rd modification of 1st Embodiment of this invention. It is a figure which shows the waveform of the command signal applied to an actuator with the manufacturing method which concerns on the 4th modification of 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the rolling bearing apparatus manufactured by the manufacturing method which concerns on the 5th modification of 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the rolling bearing apparatus manufactured by the manufacturing method which concerns on the 6th modification of 1st Embodiment of this invention. It is a flowchart explaining the manufacturing method of the rolling bearing apparatus which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the manufacturing apparatus used for the manufacturing method of FIG. It is a block diagram of the control apparatus of FIG. It is a figure which shows the relationship between a torque measured value, the command signal applied to a 1st actuator, and the command signal applied to a 2nd actuator.

[First Embodiment]
Hereinafter, the manufacturing method of the rolling bearing device concerning a 1st embodiment of the present invention is explained with reference to drawings.
The method for manufacturing a rolling bearing device according to the present embodiment can manufacture a rolling bearing device 1 as shown in FIG. 1 used in, for example, a hard disk drive device.

  As shown in FIG. 1, the rolling bearing device 1 is fitted to a first rolling bearing 10 and a second rolling bearing 20 that are coaxially arranged at intervals in the axial direction, and these rolling bearings 10 and 20. A shaft (shaft member) 31 and an annular spacer member 33 sandwiched between the rolling bearings 10 and 20 in the axial direction are provided. Reference numeral 31a indicates a flange-like flange portion protruding outward in the radial direction.

  The two rolling bearings 10 and 20 are incorporated in an annular space between the annular inner rings 11 and 21 and the outer rings 13 and 23 that are arranged coaxially so as to be able to roll at intervals in the circumferential direction. A plurality of rolling elements 15 and 25 are provided, and the inner rings 11 and 21 are fitted into the outer peripheral surface of the shaft 31 in a press-fitted state, whereby the inner rings 11 and 21 and the shaft 31 are respectively press-fitted and fixed. Yes. Further, the spacer member 33 is sandwiched between the outer rings 13 and 23 in the axial direction, whereby a gap corresponding to the axial length of the spacer member 33 is formed between the inner rings 11 and 21.

  In the rolling bearing device 1 configured as described above, when the shaft 31 is rotated about its axis, the rolling elements 15 and 25 roll between the inner rings 11 and 21 and the outer rings 13 and 23, thereby causing the shaft 31 to move. The fixed inner rings 11 and 21 are rotated about the axis with respect to the outer rings 13 and 23 together with the shaft 31.

  Further, by fixing the inner rings 11 and 21 to the shaft 31 in a state where the inner rings 11 and 21 are pressed toward each other, the inner rings 11 and 21 and the outer rings 13 and 23 and the rolling elements 15 and 25 are brought into contact with each other without any gap, thereby rolling. A state in which a preload is applied to the bearings 10 and 20 can be maintained. Hereinafter, the state before the preload is applied to the rolling bearings 10 and 20, that is, the state of the temporary assembly assembled until the distance between the inner rings 11 and 21 and the distance between the outer rings 13 and 23 becomes substantially the same, It is called solid 1A.

  As shown in the flowchart of FIG. 2, the manufacturing method of the rolling bearing device according to the present embodiment rotates the inner rings 11 and 21 about the axis with respect to the outer rings 13 and 23 of the rolling bearing device assembly 1A. (Step SA1), a pushing process (Step SA2) for pushing the inner ring 21 rotated with respect to the outer ring 23 in the rotating process in a direction in which the inner rings 11, 21 are close to each other in the axial direction, and a pushing process Torque measuring step (step SA3) for measuring the torque transmitted from the inner rings 11, 21 to the outer rings 13, 23 when the inner rings 11, 21 rotate with respect to the outer rings 13, 23 while being pushed by And a determination step (step SA4) for determining whether or not the difference between the measured torque value and the target value is equal to or less than a predetermined threshold value.

  The pushing process (step SA2) is performed after the inner ring 21 is pressed in the axial direction against the actuator that pushes the inner ring 21 of the second rolling bearing 20 in the direction close to the inner ring 11 of the first rolling bearing 10 in the axial direction. A command signal for displacing so as to release pressure is applied. Then, by driving the actuator, the inner ring 21 rotated about the axis with respect to the outer ring 23 is pressed by the rotation process (step SA1), and then the pressure is removed, so that the inner rings 11 and 21 are close to each other in the axial direction. Push in the direction.

The command signal applied to the actuator is calculated by the following equations (1) and (2), for example.
ΔV = A × (TG−TA) (1)
V _n = V _n-1 + ΔV (2)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.

The waveform of the command signal applied to the actuator is changed to a rectangular wave shape, for example. By doing so, the displacement amount of the actuator can be efficiently transmitted to the inner ring 21, and the inner ring 21 can be pushed in with high efficiency. Further, the inner ring 21 can be pushed in with a large amount of energy. When the maximum value of the command signal is V _n , the minimum value of the command signal is preferably 0 to V _n × 0.9, for example.

  Further, in the method of manufacturing the rolling bearing device according to the present embodiment, when the determination step (step SA4) determines that the difference between the torque measurement value and the target value is equal to or less than the threshold value, the rotation step (step SA1). The rotation of the inner rings 11 and 21 by the above and the pushing of the inner ring 21 by the pushing step (step SA2) are completed. Thereby, the inner rings 11 and 21 are positioned in a state where the two rolling bearings 10 and 20 are preloaded, and the inner rings 11 and 21 and the shaft 31 are fixed by press-fitting.

  On the other hand, when the determination process determines that the difference between the torque measurement value and the target value is greater than the threshold value, the maximum value of the command signal applied to the actuator is calculated based on the torque measurement value and the target value. (Step SA7). Based on the calculated maximum value of the command signal, the waveform of the command signal applied to the actuator is shaped (step SA8), and the process returns to the pushing step (step SA2). Thereby, in the pushing step (step SA2), the displacement amount of the actuator is increased by the amount corresponding to the increase of the maximum value of the command signal, and the inner ring 21 is pushed further, and the position of the inner ring 21 is adjusted so as to obtain a desired torque. It will be reworked.

In the present embodiment, for example, a manufacturing apparatus 100 as shown in FIG. 3 is used.
As shown in the figure, the manufacturing apparatus 100 includes a shaft receiver 41 that fixes the shaft 31 of the rolling bearing device assembly 1A, and a motor (rotating means) 43 that rotates the shaft 31 fixed to the shaft receiver 41 about its axis. An inner ring pusher 45 that can push the inner ring 21 of the rolling bearing device assembly 1A in the axial direction, an actuator 47 such as a piezoelectric element that can be displaced so as to move the inner ring pusher 45 back and forth in the axial direction, and the outer rings 13 and 23. In contrast, the load cell 49 for measuring the torque transmitted from the inner rings 11 and 21 to the outer rings 13 and 23 when the inner rings 11 and 21 rotate, and the motor 43, the actuator 47 and the load cell (torque measuring device ) 49 are controlled. And a control device 50. The inward pusher 45 and the actuator 47 constitute pushing means. Reference numeral 42 denotes a support portion that supports the shaft receiver 41 so as to be rotatable around the axis, and reference numeral 46 denotes a support portion that supports the inner ring pusher 45 so as to be rotatable around the axis.

The shaft receiver 41 is rotated around the axis by a motor 43.
The actuator 47 can move the inner ring pusher 45 in the axial direction to press the inner ring 21 of the second rolling bearing 20 and to push the inner ring 21 in a direction to approach the inner ring 11 of the first rolling bearing 10. ing.

  The load cell 49, for example, presses a contact portion 49a made of a high friction coefficient material such as a resin having a high friction coefficient against the outer ring 13 of the first rolling bearing 10 from the outside in the radial direction to act on the outer rings 13 and 23. , That is, torque transmitted from the inner rings 11, 21 to the outer rings 13, 23 when the inner rings 11, 21 rotate with respect to the outer rings 13, 23 can be measured. When the torque is measured by the load cell 49, the output voltage is sent to the control device 50.

  As shown in FIG. 4, the control device 50 performs arithmetic processing and determination processing to calculate a torque measurement value or sends a command signal to the actuator 47 and the motor 43, and performs arithmetic processing and determination processing to perform the actuator 47 and the motor 43. CPU (Central Processing Unit) 51 serving as a determination means for sending a command signal to the A / D converter, AD converters 52 and 54 for converting the command signal from the CPU 51 into a drive voltage, and amplifying the drive voltage converted by the AD converter 52 An amplifier 53 to be applied to the actuator 47, a driver (voltage amplifier) 55 to amplify the drive voltage converted by the AD converter 54 and apply it to the motor 43, an amplifier 56 to amplify the output voltage from the load cell 49, The output voltage amplified by the amplifier 56 is digitized and a signal is sent to the CPU 51. An AD converter 58 for sending, and a memory 59 for storing the measured torque value, the target value, the threshold value, and the like input to the CPU 51 are provided.

Next, the operation of the method of manufacturing the rolling bearing device according to this embodiment configured as described above will be described.
In order to manufacture the rolling bearing device 1 by the manufacturing method according to the present embodiment, first, the shaft 31 of the rolling bearing device assembly 1 </ b> A is fixed to the shaft receiver 41. The inner ring pusher 45 is brought into contact with the axial end surface of the inner ring 21 of the second rolling bearing 20, and the contact portion 49 a of the load cell 49 is brought into contact with the outer circumferential surface of the outer ring 13 of the first rolling bearing 10.

  Next, a command signal is output from the CPU 51 to drive the motor 43 via the AD converter 54 and the driver 55, and the shaft 31 together with the shaft receiver 41 is rotated about the axis (step SA1). When the shaft 31 rotates about the axis, the inner rings 11 and 21 into which the shaft 31 is press-fitted rotate about the axis with respect to the outer rings 13 and 23, and torque is transmitted from the inner rings 11 and 21 to the outer rings 13 and 23.

  Subsequently, a command signal is output from the CPU 51 to drive the actuator 47 via the AD converter 52 and the amplifier 53, and the inner ring pusher 45 presses the inner ring 21 of the rotating second rolling bearing 20 in the axial direction. The pressure is released later. As a result, the inner ring 21 is pushed in a direction approaching the inner ring 11 of the first rolling bearing 10 (step SA2).

  Here, the inner ring 11 of the first rolling bearing 10 is abutted against the flange portion 31 a of the shaft 31. Therefore, by simply pushing the inner ring 21 in the axial direction, the inner rings 11 and 21 are brought close to each other in the axial direction, and a preload is applied to the first rolling bearing 10 and the second rolling bearing 20. When preload is applied to the rolling bearings 10 and 20, the torque transmitted from the inner rings 11 and 21 to the outer rings 13 and 23 increases.

  Subsequently, when the inner rings 11 and 21 rotate about the axis with respect to the outer rings 13 and 23, the torque transmitted from the inner rings 11 and 21 to the outer rings 13 and 23 is measured by the load cell 49 (step SA3). ). The output voltage from the load cell 49 is amplified by the amplifier 56 and digitized by the AD converter 58, and the output signal is input to the CPU 51.

  Next, the CPU 51 calculates a torque measurement value based on the input output signal. The torque measurement value calculated by the CPU 51 is stored in the memory 59. Then, the CPU 51 determines whether or not the calculated torque measurement value and the target value stored in the memory 59 substantially match each other, that is, whether or not the difference between the torque measurement value and the target value is equal to or less than a predetermined threshold value. Is determined (step SA4).

  When the CPU 51 determines that the difference is equal to or smaller than the threshold value, a drive stop command signal is input to the actuator 47 via the AD converter 52 and the amplifier 53, and also via the AD converter 54 and the driver 55. A drive stop command signal is input to the motor 43. Then, the pushing of the inner ring 21 by the inner ring pusher 45 is finished (step SA5), and the rotation of the inner rings 11, 21 with respect to the outer rings 13, 23 together with the shaft 31 is stopped (step SA6).

  Thus, the rolling bearing device 1 is completed in which the inner ring 21 is press-fitted and fixed with respect to the shaft 31 in a state where the first rolling bearing 10 and the second rolling bearing 20 are preloaded.

  On the other hand, when the CPU 51 determines that the difference is larger than the threshold value, the command signal applied to the actuator 47 is calculated by the above formulas (1) and (2) based on the torque measurement value and the target value. (Step SA7).

  When the target value and the torque measurement value are separated from each other by the equations (1) and (2), the maximum value of the command signal is greatly increased to increase the displacement increase of the actuator 47, and the pushing amount of the inner ring 21 is increased. Can be increased. On the other hand, when the target value and the torque measurement value are close to each other, the maximum value of the command signal is slightly increased to decrease the displacement increase of the actuator 47, and the pushing amount of the inner ring 21 can be reduced. Since the inner rings 11 and 21 and the shaft 31 are fitted in a press-fitted state, the preload amount is irreversible, and the preload amount does not change even if Vn is decreased when ΔV is negative.

  Next, the CPU 51 shapes the waveform of the drive voltage applied to the actuator 47 based on the calculated maximum value of the command signal (step SA8), and returns to the pushing step (step SA2). Then, the maximum value of the command signal is increased and applied to the actuator 47 as shown in FIG. In FIG. 5, the vertical axis represents torque, and the horizontal axis represents time.

  As a result, the actuator 47 is greatly expanded and contracted by an amount corresponding to the increase in the maximum value of the command signal, and the inner ring 21 is further pushed in the axial direction. Then, Step SA2 to Step SA4 are performed. In this way, Step SA2 to Step SA4, Step SA7, and Step SA8 are repeated until the difference between the torque measurement value and the target value is equal to or less than the predetermined threshold value.

  As described above, according to the manufacturing method of the rolling bearing device according to the present embodiment, the inner rings 11 and 21 and the shaft 31 are fixed with the adhesive by fixing the inner rings 11 and 21 and the shaft 31 by press-fitting. The waiting time until the adhesive is cured can be omitted. In addition, by making the torque transmitted from the inner ring 11 to the outer ring 13 substantially coincide with the target value, there is no need to be influenced by individual differences in the curvature of the radial play or raceway.

  Then, the actuator 47 is displaced so as to release the pressure after pressing the inner ring 21, so that strain is accumulated in the shaft receiver 41 of the manufacturing apparatus 100 that fixes the inner ring 21 by pressing the inner ring 21 into the shaft 31 in a press-fitted state. Can be prevented. And it can prevent that the inner ring | wheel 21 is pushed in excessively by the influence of the distortion of the manufacturing apparatus 100, and a preload is excessively applied to the rolling bearings 10 and 20. FIG. Thereby, the rolling bearing device 1 with little variation in torque can be manufactured in a short time.

This embodiment can be modified as follows.
In the present embodiment, the command signal to be applied to the actuator 47 is calculated by the above formulas (1) and (2). As a first modification, for example, the command signal is expressed by the following formulas (3) and (3) It is good also as calculating by 4).
ΔV = A × (TG−TA / TG) ^m (3)
V _n = V _n-1 + ΔV (4)

  In this way, when the target value and the torque measurement value are separated from each other, the increase in the displacement of the actuator 47 is increased. On the other hand, when the target value and the torque measurement value are close to each other, the increase in the displacement of the actuator 47 is increased. The torque can be set accurately with a smaller torque. The rolling bearing device 1 having an average torque with less torque variation can be manufactured in a shorter time.

In the present embodiment, the waveform of the command signal applied to the actuator 47 is changed to a rectangular waveform. However, as a second modification, for example, as shown in FIG. It is good also as changing the waveform of this to the waveform which returns to an initial value at a stretch after raising with time progress, ie, a sawtooth wave shape. Again, when the maximum value of the command signal and V _n, the minimum value of the command signal is preferably a 0 to V _n × 0.9.

  By doing in this way, compared with the case where the waveform of the command signal is changed to a rectangular wave shape, the impact between the raceways of the inner races 11 and 21 and the outer races 13 and 23 and the rolling elements 15 and 25 is mitigated, and a spike shape is obtained. Can be prevented from occurring. Thereby, the rolling bearing device 1 with few read / write errors when mounted on a hard disk can be manufactured.

As a third modification, for example, as shown in FIG. 7, the waveform of the command signal applied to the actuator 47 is changed into a sine wave shape such that the center position of the amplitude is at the center position between the minimum value and the maximum value. It is also possible to make it. Again, when the maximum value of the command signal and V _n, the minimum value of the command signal is preferably a 0 to V _n × 0.9.

  Also in this case, compared with the case where the waveform of the command signal is changed to a rectangular wave shape, the impact between the raceways of the inner rings 11 and 21 and the outer rings 13 and 23 and the rolling elements 15 and 25 is alleviated and spiked. The rolling bearing device 1 can be manufactured by preventing occurrence of torque fluctuations and reducing read / write errors when mounted on a hard disk.

As a fourth modification, for example, as shown in FIG. 8, the command signal applied to the actuator 47 may be changed in a waveform formed by the following equations (5) and (6).
ΔP = (V _n −P _n−1 ) × A (5)
P _n = P _n-1 + ΔP (6)
Here, ΔP is the increment of the command signal value, and P _n is the command signal value.
When ΔP increases and V _n −P _n−1 becomes negative, the waveform is as shown in FIG.

  By doing so, the command signal is changed to a wave shape that is returned to the initial value at once after being raised with the passage of time as in the second modified example, or the command signal is changed in a sine wave shape as in the third modified example. The inner ring 21 can be pushed in with a displacement amount close to the maximum amplitude of the displacement amount of the actuator 47 as compared with the case of making it. Also in this case, similarly, the impact between the raceway of the inner races 11 and 21 and the outer races 13 and 23 and the rolling elements 15 and 25 is alleviated to prevent the occurrence of spike-like torque fluctuations and is mounted on the hard disk. In this case, the rolling bearing device 1 with few read / write errors can be manufactured.

  In the present embodiment, the inner rings 11 and 21 and the shaft 31 are fixed by press-fitting. As a fifth modification, for example, the inner rings 11 and 21 and the shaft 31 are arranged before the rotation step (step SA1). It is good also as including the adhesive agent application process of apply | coating an adhesive agent between.

  In this case, as shown in FIG. 9, when assembling the rolling bearing device assembly 1 </ b> A, the adhesive is applied in advance to the gap between the inner peripheral surface of the inner rings 11 and 21 and the outer peripheral surface of the shaft 31 by an adhesive application process. 37 may be applied in advance. And before the adhesive 37 hardens | cures, what is necessary is just to perform the process after a rotation process (step SA1).

  By doing in this way, the inner ring | wheels 11 and 21 and the shaft 31 adhere | attach when the adhesive agent 37 hardens | cures in the state fixed to the shaft 31 by press injection in the position where the inner ring | wheel 21 was pushed. Therefore, the inner rings 11 and 21 and the shaft 30 can be more firmly fixed by the adhesive 37 while maintaining the preloaded state in a short time.

  Further, as a sixth modified example, for example, after the rotation of the inner rings 11 and 21 by the rotation process (step SA1) and the pushing of the inner ring 21 by the pushing process (step SA2), the pushing process (step SA3) is performed in the axial direction. It is good also as including the welding process of laser-welding the inner ring 21 and the shaft 31 which were pushed in.

  In this case, for example, as shown in FIG. 10, the vicinity of the boundary between the peripheral edge of one end face of the inner ring 21 pushed in by the pushing step SA2 and the outer circumferential face of the shaft 31 may be laser-welded. In FIG. 10, reference numeral 39 indicates a laser welding mark. By doing so, the inner ring 21 and the shaft 31 are joined by laser welding in a state where the inner ring 21 is fixed to the shaft 31 by press-fitting at the position where the inner ring 21 is pushed. Therefore, it is possible to more firmly fix the inner rings 11 and 21 and the shaft 30 by laser welding while maintaining the pre-loaded state in a short time.

[Second Embodiment]
Next, a method for manufacturing a rolling bearing device according to the second embodiment of the present invention will be described.
In the method of manufacturing the rolling bearing device according to the present embodiment, as shown in the flowchart of FIG. 11, the pushing process (step SB2) rotates about the axis with respect to the outer ring 23 by the rotating process (step SA1). A first pushing process of pushing the inner ring 21 in a direction in which the inner rings 11 and 21 are axially close to each other by displacement of the first actuator, and a first pushing process of the inner ring 21 together with the first actuator by displacement of the second actuator At the same time, the second embodiment is different from the first embodiment in that it includes a second pushing process of pushing in the axial direction.
Hereinafter, the same reference numerals are given to the portions having the same configuration as the manufacturing method of the rolling bearing device according to the first embodiment, and the description thereof is omitted.

  Further, in the method of manufacturing the rolling bearing device according to the present embodiment, when the determination step (step SA4) determines that the difference between the torque measurement value and the threshold value is greater than the predetermined threshold value, the torque measurement value and the target value are determined. Based on the value, an increase amount of the second command signal for further pushing the inner ring 21 by the second actuator is calculated, and the process returns to the pushing step (step SA2). As a result, in the pushing step, the displacement amount of the second actuator is increased by the amount of the increase in the second command signal, the inner ring 21 is pushed further, and the position of the inner ring 21 is readjusted so as to obtain a desired torque. .

A command signal having a value obtained by subtracting a value corresponding to the difference between the minimum value and the maximum value of the displacement of the first actuator from the command signal calculated by the following equations (7) and (8) is applied to the second actuator. It has become.
ΔV = A × (TG−TA) (7)
V _n = V _n-1 + ΔV (8)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.

  In this embodiment, as shown in FIG. 12, a first actuator 147A that supports an inner ring pusher 45 and is displaceable so as to release pressure after pressing the inner ring 21 together with the inner ring pusher 45 in the axial direction, and a first actuator 147A. The manufacturing apparatus 200 including the second actuator 147B capable of pushing the inner ring 21 in the axial direction together with the first actuator 147A and the inner ring pusher 45 is used by displacing the first actuator 147A in the axial direction. ing.

  As shown in FIG. 13, the control device 50 amplifies the AD converters 52A and 52B that convert the command signal from the CPU 51 into a drive voltage, and the drive voltage converted by the AD converter 52A to the first actuator 147A. An amplifier 53A to be applied and an amplifier 53B to amplify the drive voltage converted by the AD converter 52B and apply it to the second actuator 147B are provided.

  The CPU 51 applies a first command signal to the first actuator 147A for displacement so as to release the pressure after pressing the inner ring 21 via the AD converter 52A and the amplifier 53A. The waveform of the first command signal is changed to a rectangular wave shape, for example.

  Further, the CPU 51 applies a second command signal for displacing the first actuator 147A to the second actuator 147B via the AD converter 52B and the amplifier 53B. The difference between the minimum value and the maximum value of the displacement of the first actuator 147A is desirably larger than 10% of the maximum displacement amount of the second actuator 147B.

The operation of the method of manufacturing the rolling bearing device according to this embodiment configured as described above will be described.
In order to manufacture the rolling bearing device 1 by the manufacturing method according to the present embodiment, first, the inner rings 11 and 21 are rotated around the shaft together with the shaft 31 of the rolling bearing device assembly 1A (step SA1).

  Subsequently, a command signal is output from the CPU 51, and a first command signal is applied to the first actuator 147A via the AD converter 52A and the amplifier 53A to displace the inner ring 21 so that it is depressurized after being pressed in the axial direction. Then, a second command signal for displacing the first actuator 147A in the axial direction is applied to the second actuator 147B via the AD converter 52B and the amplifier 53B.

  Then, the first actuator 147A is driven and the inner ring pusher 45 presses the inner ring 21 in the axial direction, and then the second actuator 147B is driven and the first actuator 147A is pushed in the axial direction while releasing the pressure. As a result, the inner ring 21 is pushed together with the first actuator 147A in a direction close to the inner ring 11 of the first rolling bearing 10 in the axial direction (step SB2).

  When the torque transmitted from the inner rings 11 and 21 rotating around the axis to the outer rings 13 and 23 is measured by the load cell 49 (step SA3), the output voltage is sent to the CPU 51 via the amplifier 56 and the AD converter 58. Is input. Then, the CPU 51 calculates a torque measurement value based on the output signal, and determines whether or not the difference from the target value stored in the memory 59 is equal to or less than a predetermined threshold value (step SA4).

  When it is determined that the difference is equal to or less than the threshold value, the CPU 51 inputs a drive stop command signal to the actuator 47 and the inner ring pusher 45 finishes pushing the inner ring 21 (step SA5), and the motor 43 stops driving. Is input to stop the rotation of the inner rings 11, 21 with respect to the outer rings 13, 23 (step SA6). Thus, the rolling bearing device 1 is completed in which the inner ring 21 is press-fitted and fixed with respect to the shaft 31 in a state where the first rolling bearing 10 and the second rolling bearing 20 are preloaded.

  On the other hand, if it is determined that the difference is larger than the threshold, the CPU 51 generates a second command signal for further pushing the inner ring 21 by the second actuator 147B based on the torque measurement value and the target value. , (8) (step SB7).

  According to the above formulas (7) and (8), when the target value and the torque measurement value are separated from each other, the maximum value of the second command signal is greatly increased to increase the displacement increase of the second actuator 147B. The pushing amount of the inner ring 21 can be increased. On the other hand, when the target value and the torque measurement value are close to each other, the maximum value of the second command signal can be slightly increased to further reduce the increase in displacement of the pushing amount of the inner ring 21 by the second actuator 147B. Thereby, torque can be set more accurately.

  When the increase amount of the second command signal is calculated by the CPU 51, the process returns to the pushing step (step SB2), and the second command signal applied to the second actuator 147B increases as shown in FIG. In FIG. 13, the vertical axis represents torque and the horizontal axis represents time.

  As a result, the second actuator 147B expands and contracts by the increase amount of the second command signal, and the inner ring 21 is further pushed in the axial direction. Then, Step SA4 to Step SA4 are performed. In this way, Step SB2 to Step SA4 and Step SB7 are repeated until the difference between the measured torque value and the target value is equal to or less than the predetermined threshold value.

  As described above, according to the manufacturing method of the rolling bearing device according to the present embodiment, the inner ring 21 is pivoted by the first actuator 147A and the second actuator 147B in the first pushing step and the second pushing step of the pushing step SB2. When pushing in the direction, the first actuator 147A is displaced so as to release the pressure after pushing the inner ring 21 in the axial direction, so that the inner rings 11 and 21 are fixed by pushing the inner ring 21 into the shaft member in the press-fitted state. It is possible to prevent the strain from accumulating in the manufacturing apparatus 200 and to prevent the inner ring 21 from being excessively pushed by the influence of the strain and applying excessive preload to the rolling bearings 10 and 20.

  Further, while changing the first command signal with a constant waveform for the first actuator 147A, the second command signal applied to the second actuator 147B only increases the maximum value by the additional pushing amount. The maximum amount of displacement that pushes the inner ring 21 in the axial direction can be controlled. Therefore, the waveform of the command signal for driving the first actuator 147A and the second actuator 147B can be calculated easily and in a short time. Accordingly, it is possible to manufacture the rolling bearing device 1 in which the time required for the indentation process is shortened, the variation in torque is reduced, and the preload is appropriately applied.

  In the present embodiment, the first command signal applied to the first actuator 147A is changed to a rectangular wave shape. Instead, for example, the first command signal may be changed to a sine wave shape, or time elapses. It is good also as making it vibrate to the waveform which returns to an initial value at a stretch after making it raise together.

In the present embodiment, the second command signal applied to the second actuator 147B is calculated by the above formulas (7) and (8). As a seventh modified example, for example, the following formula (8) ), (9), the second command signal may be calculated by subtracting a value corresponding to the difference between the minimum and maximum displacements of the first actuator 147A from the second command signal calculated in (9).
V _n = V _n-1 + ΔV (8)
ΔV = A × ((TG−TA) / TG) ^m (9)

  By doing so, when the target value and the torque measurement value are separated from each other, the maximum value of the second command signal is greatly increased to increase the displacement increase of the second actuator 147B, and the inner ring 21 is pushed. The amount can be increased. On the other hand, when the target value and the torque measurement value are close to each other, the maximum value of the second command signal is slightly increased to reduce the displacement increase of the second actuator 147B, and the rolling bearing device 1 with less variation in average torque. Can be manufactured in a short time.

  As mentioned above, although each embodiment of this invention and its modification were explained in full detail with reference to drawings, the concrete structure is not restricted to these embodiment, The design of the range which does not deviate from the summary of this invention Changes are also included. For example, the present invention is not limited to those applied to the above-described embodiments and modifications, but may be applied to embodiments in which these embodiments and modifications are appropriately combined, and is not particularly limited. Absent. For example, in the second embodiment, an adhesive application process may be included, or a laser welding process may be included.

  Also, for example, rotate the outer ring, push the outer ring in the direction in which the outer rings are close to each other in the axial direction, and measure the torque transmitted from the outer ring to the inner ring when rotating with respect to the inner ring while the outer ring is pushed. You may take the method to do. In addition, an example in which two rolling bearings are configured by two inner rings and two outer rings that are arranged coaxially with an interval in the axial direction has been shown. However, two inner rings or two outer rings and a spacer member are integrated. The structure, that is, the structure in which either the inner ring or the outer ring is formed of a single member and has two race rings also corresponds to the “two rolling bearings arranged coaxially” of the present invention.

DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus 1A Rolling bearing apparatus assembly 10 1st rolling bearing (rolling bearing)
11, 21 Inner ring 13, 23 Outer ring 15, 25 Rolling element 20 Second rolling bearing (rolling bearing)
31 Shaft (shaft member)
37 Adhesive 47 Actuator SA1 Rotation process (Step SA1)
SA2 indentation process (step SA2)
SA3 Torque measurement process (step SA3)
SA4 determination step (step SA4)
SB2 pushing process (step SB2)

Claims (18)

A rotating step of rotating the inner ring around an axis with respect to an outer ring of a rolling bearing assembly in which a shaft member is fitted in an inner ring of two rolling bearings arranged coaxially with an interval in the axial direction; ,
A command signal for displacing the inner ring after pressing the inner ring in the axial direction is applied to the actuator, and the inner ring is rotated about the axis with respect to the outer ring by the rotation process due to the displacement of the actuator. A pushing step of pushing the inner rings in a direction close to each other in the axial direction;
A torque measuring step for measuring torque transmitted from the inner ring to the outer ring when the inner ring is rotated with respect to the outer ring while being pushed by the pushing step;
A determination step of determining whether or not a difference between the torque measurement value measured by the torque measurement step and the target value is a predetermined threshold value or less,
When the determination step determines that the difference is equal to or less than the predetermined threshold value, the rotation of the inner ring by the rotation step and the pressing of the inner ring by the pressing step are terminated, and the difference is the predetermined threshold value. The rolling bearing device is manufactured by increasing the maximum value of the command signal based on the measured torque value and the target value and returning to the pushing step when it is determined that the value is larger than the measured value. A rotating step of rotating the outer ring around an axis with respect to an inner ring of a rolling bearing assembly in which a shaft member is fitted in an outer ring of two rolling bearings arranged coaxially with an interval in the axial direction; ,
A command signal for displacing the outer ring after pressing the outer ring in the axial direction is applied to the actuator, and the outer ring is rotated about the axis with respect to the inner ring by the rotation process due to the displacement of the actuator. and pushing pushing step in a direction to what the outer ring close to each other in the axial direction,
When the by pressing lump step outer ring is rotated relative to the inner ring while pushed, a torque measuring step of measuring the torque from the outer race is transmitted to the inner ring,
A determination step of determining whether or not a difference between the torque measurement value measured by the torque measurement step and the target value is a predetermined threshold value or less,
When it is determined by the determination step that the difference is equal to or less than the predetermined threshold, the rotation of the outer ring by the rotation step and the pushing of the outer ring by the pressing step are finished, and the difference is the predetermined threshold. The rolling bearing device is manufactured by increasing the maximum value of the command signal based on the measured torque value and the target value and returning to the pushing step when it is determined that the value is larger than the measured value. The method for manufacturing a rolling bearing device according to claim 1, wherein the command signal is calculated by the following expressions (1) and (2).
ΔV = A × (TG−TA) (1)
V _n = V _n-1 + ΔV (2)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value. The method for manufacturing a rolling bearing device according to claim 1, wherein the command signal is calculated by the following expressions (3) and (4).
ΔV = A × ((TG−TA) / TG) ^m (3)
V _n = V _n-1 + ΔV (4)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.   The method for manufacturing a rolling bearing device according to any one of claims 1 to 4, wherein the waveform of the command signal is changed to a rectangular wave shape.   The method of manufacturing a rolling bearing device according to any one of claims 1 to 4, wherein the waveform of the command signal is changed so as to return to the initial value at once after being raised with the passage of time.   The method for manufacturing a rolling bearing device according to any one of claims 1 to 4, wherein the waveform of the command signal is changed to a sine wave shape. The method for manufacturing a rolling bearing device according to any one of claims 1 to 4, wherein the command signal is changed in a waveform formed by the following expressions (5) and (6).
ΔP = (V _n −P _n−1 ) × A (5)
P _n = P _n-1 + ΔP (6)
Here, ΔP is the increment of the command signal value, and P _n is the command signal value. A rotating step of rotating the inner ring around an axis with respect to an outer ring of a rolling bearing assembly in which a shaft member is fitted in an inner ring of two rolling bearings arranged coaxially with an interval in the axial direction; ,
A first command signal is applied to the first actuator to displace the inner ring so that the inner ring is depressurized after being axially pressed. A first pushing step of pushing the rotated inner ring in a direction in which the inner rings are close to each other in the axial direction;
A second command signal for displacing the first actuator in the axial direction is applied to the second actuator, and the inner ring is moved together with the first actuator simultaneously with the first pushing step by the displacement of the second actuator. A second pushing process of pushing in the axial direction;
When the inner ring by first pushing step and the second pushing step is rotated relative to the outer ring while pushed, the torque transmitted from the inner race to the outer race, as measured by a load cell, calculates the torque measurements Torque measurement process to perform,
A determination step of determining whether or not a difference between the torque measurement value calculated by the torque measurement step and the target value is equal to or less than a predetermined threshold value,
When the determination step determines that the difference is equal to or less than the predetermined threshold, the rotation of the inner ring by the rotation step and the pushing of the inner ring by the pressing step are terminated, and the difference is less than the predetermined threshold. A method of manufacturing a rolling bearing device that returns to the pushing step of pushing in by increasing the second command signal based on the measured torque value and the target value when it is determined to be large. A rotating step of rotating the outer ring around an axis with respect to an inner ring of a rolling bearing assembly in which a shaft member is fitted in an outer ring of two rolling bearings arranged coaxially with an interval in the axial direction; ,
A first command signal is applied to the first actuator to displace the outer ring so that the outer ring is depressurized in the axial direction, and the first actuator is displaced around the axis with respect to the inner ring by the rotation process. A first pushing step of pushing the outer ring being rotated in a direction in which the outer rings are close to each other in the axial direction;
A second command signal for displacing the first actuator in the axial direction is applied to the second actuator. Due to the displacement of the second actuator, the outer ring is moved together with the first actuator simultaneously with the first pushing step. A second pushing process of pushing in the axial direction;
When the first pushing step and the outer ring by second pushing step is rotated relative to the inner ring while pushed, the torque transmitted from the outer race to the inner race, as measured by a load cell, calculates the torque measurements Torque measurement process to perform,
The difference between the torque measurement value calculated by the torque measurement step and the target value is not more than a predetermined threshold value.

A determination step of determining whether or not there is,
When the determination step determines that the difference is equal to or less than the predetermined threshold, the rotation of the outer ring by the rotation step and the pushing of the outer ring by the pushing step are terminated, and the difference is less than the predetermined threshold. A method of manufacturing a rolling bearing device that returns to the pushing step of pushing in by increasing the second command signal based on the measured torque value and the target value when it is determined to be large.   The method of manufacturing a rolling bearing device according to claim 9 or 10, wherein the waveform of the first command signal is changed to a rectangular wave shape, a sine wave shape, or a wave shape that rises with time and returns to the initial value all at once. . The second command signal is a difference between the minimum value and the maximum value of the displacement of the first actuator from the command signal value calculated by the following equations (7), (8) or the following equations (8), (9). The method for manufacturing a rolling bearing device according to any one of claims 9 to 11, which is a value obtained by subtracting a corresponding value.
ΔV = A × (TG−TA) (7)
V _n = V _n-1 + ΔV (8)
ΔV = A × ((TG−TA) / TG) ^m (9)
Here, ΔV is an increase in the command signal value, A is a predetermined coefficient, TG is a target value, TA is a torque measurement value, and V _n is a command signal value.   The method for manufacturing a rolling bearing device according to any one of claims 1 to 12, further comprising an adhesive application step of applying an adhesive between the inner ring and the shaft member before the rotation step.   13. The method according to claim 1, further comprising a welding step of laser welding the inner ring pushed in the axial direction and the shaft member after completion of rotation of the inner ring by the rotation step and pushing of the inner ring by the pushing step. The manufacturing method of the rolling bearing apparatus in any one. Rotating means for rotating the inner ring around an axis with respect to an outer ring of a rolling bearing assembly in which a shaft member is press-fitted into an inner ring of two rolling bearings arranged coaxially with an interval in the axial direction. ,
A command signal for displacing the inner ring after pressing the inner ring in the axial direction is applied to the actuator, and the inner ring is rotated about the axis relative to the outer ring by the rotating means due to the displacement of the actuator. Pushing means for pushing the inner rings in a direction close to each other in the axial direction;
Torque measuring means for measuring torque transmitted from the inner ring to the outer ring when rotating with respect to the outer ring while the inner ring is pushed by the pushing means;
Determining means for determining whether or not the difference between the torque measurement value measured by the torque measurement means and the target value is equal to or less than a predetermined threshold;
When the determination unit determines that the difference is equal to or less than the predetermined threshold, the rotation of the inner ring by the rotating unit and the pressing of the inner ring by the pressing unit are terminated, and the difference is the predetermined threshold. The rolling bearing device manufacturing apparatus in which the maximum value of the command signal is increased based on the measured torque value and the target value, and the pushing means pushes the inner ring when it is determined that the inner ring is larger. Rotating means for rotating the outer ring around its axis with respect to the inner ring of the rolling bearing assembly in which a shaft member is fitted in an outer ring of two rolling bearings arranged coaxially with an interval in the axial direction. ,
A command signal for displacing the outer ring after pressing the outer ring in the axial direction is applied to the actuator, and the outer ring is rotated about the axis with respect to the inner ring by the rotating means due to the displacement of the actuator. and pushing the pushing means in a direction to what the outer ring close to each other in the axial direction,
When the by pressing inclusive means outer ring is rotated relative to the inner ring while pushed, and torque measuring means for measuring the torque from the outer race is transmitted to the inner ring,
Determining means for determining whether or not the difference between the torque measurement value measured by the torque measurement means and the target value is equal to or less than a predetermined threshold;
When the determination unit determines that the difference is equal to or less than the predetermined threshold, the rotation of the outer ring by the rotating unit and the pressing of the outer ring by the pressing unit are terminated, and the difference is the predetermined threshold. The rolling bearing device manufacturing apparatus in which the maximum value of the command signal is increased based on the measured torque value and the target value and the pushing means pushes the outer ring when it is determined that the outer ring is larger. Rotating means for rotating the inner ring around an axis with respect to an outer ring of a rolling bearing assembly in which a shaft member is press-fitted into an inner ring of two rolling bearings arranged coaxially with an interval in the axial direction. ,
A first command signal for displacing the inner ring after pressing the inner ring in the axial direction is applied to the first actuator, and by the displacement of the first actuator, the rotating means rotates about the axis with respect to the outer ring. First pushing means for pushing the inner ring being rotated in a direction in which the inner rings are close to each other in the axial direction;
A second command signal for displacing the first actuator in the axial direction is applied to the second actuator, and the inner ring is moved together with the first actuator simultaneously with the first pushing means by the displacement of the second actuator. A second pushing means for pushing in the axial direction;
When the inner ring by the first pushing means and the second pushing means is rotated relative to the outer ring while pushed, the torque transmitted from the inner race to the outer race, as measured by a load cell, calculates the torque measurements Torque measuring means for
Determining means for determining whether or not the difference between the torque measurement value calculated by the torque measurement means and the target value is equal to or less than a predetermined threshold;
When the determination means determines that the difference is equal to or less than the predetermined threshold, the rotation of the inner ring by the rotation means and the pushing of the inner ring by the first pushing means and the second pushing means are terminated, If the difference is determined to be greater than said predetermined threshold, increasing said second command signal based on the target value and the torque measurement value, the second pushing means pushing the rolling bearing of the inner ring Equipment manufacturing equipment. Rotating means for rotating the outer ring around its axis with respect to the inner ring of the rolling bearing assembly in which a shaft member is fitted in an outer ring of two rolling bearings arranged coaxially with an interval in the axial direction. ,
A first command signal is applied to the first actuator so that the outer ring is displaced so as to be depressurized after being pressed in the axial direction, and the rotation of the first actuator causes the rotating means to rotate around the axis with respect to the inner ring. First pushing means for pushing the outer ring being rotated in a direction in which the outer rings are close to each other in the axial direction;
A second command signal for displacing the first actuator in the axial direction is applied to the second actuator. Due to the displacement of the second actuator, the outer ring is moved together with the first actuator simultaneously with the first pushing means. A second pushing means for pushing in the axial direction;
When the outer ring by the first pushing means and the second pushing means is rotated relative to the inner ring while pushed, the torque transmitted from the outer race to the inner race, as measured by a load cell, calculates the torque measurements Torque measuring means for
Determining means for determining whether or not the difference between the torque measurement value calculated by the torque measurement means and the target value is equal to or less than a predetermined threshold;
When the determination unit determines that the difference is equal to or less than the predetermined threshold, the rotation of the outer ring by the rotation unit and the pressing of the outer ring by the first pressing unit and the second pressing unit are terminated, If the difference is determined to be greater than said predetermined threshold, increasing said second command signal based on the target value and the torque measurement value, the second pushing means pushing the rolling bearing of the outer ring Equipment manufacturing equipment.

Images