JPH11153505A - Rotor positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a rotor at a reference position without measuring a rotation angle of the rotor from the reference position to the measured position, by providing a reference position producing means and the like for producing a certain reference position in one rotation of the rotor. SOLUTION: A frequency diving circuit 24 (reference position producing means) produces a reference position signal B indicating a reference position in one rotation of a work (rotor) based on a frequency-divided data produced with pulse signals from a rotation angle sensor. A shift register 25 adjusts the reference position signal B to a measured position (unbalance generating position) based on shift data produced using the difference between the reference position signal B and data of the unbalance position of the work. A measurement control circuit 23 detects the unbalance generation position (unbalance position and measured position) of the work on the basis the reference position signal B. By this, the measured position becomes the reference position and so the measurement of rotation angle of the work from the reference position to the measured position becomes unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body positioning apparatus, and more particularly, to a method for easily positioning a position of a rotating body for removing measured unbalance and a cutting tool such as a drill. The present invention relates to a rotational body imbalance correcting device.

[0002]

2. Description of the Related Art Conventionally, while rotating a rotating body at an arbitrary rotation speed, the amount of whirling of the rotating body at that time and the position where the whirling occurs are detected, and the position where the whirling occurs is detected by a drill or cutter. 2. Description of the Related Art A rotating body unbalance correcting device that corrects dynamic unbalance (hereinafter simply referred to as unbalance) of a rotating body by performing a removing process (for example, a cutting process) by a whirling amount by a cutting tool such as a cutting tool is known. ing.

Here, the positioning of the rotating body for removing the unbalance is performed by using a dog (mark) which is a reference position on the rotating body,
A reference mark is provided, a rotation angle (hereinafter referred to as a rotation angle) from the reference position to a positioning position (removal processing position) is measured, and after detecting the reference position, the reference mark is rotated to the determined rotation angle and stopped. I have to.

[0004]

However, in the conventional method of positioning a rotating body, it is necessary to provide an extra dog on a rotating body manufactured with minimum imbalance. For this reason, in a device for correcting imbalance of a rotating body,
The occurrence of the unbalance of the rotating body due to the provision of the dog causes a problem that the unbalance position and the unbalance amount of the rotating body cannot be measured with high accuracy.

In the case of a fiducial mark whose mass is negligible with respect to the dog and does not affect the measurement of the unbalance position and the unbalance amount of the rotating body, the unbalance measurement for measuring the unbalance of the rotating body. Prior to the process and the imbalance correction process, a mark attaching process for attaching a reference mark to the rotating body is required. Furthermore, when the reference mark is detected by the detector, if the reference mark is dirty, peeled off, or the reference mark is broken, etc., it is impossible to accurately measure the position of the imbalance of the rotating body,
An erroneous operation such as cutting a position different from the actual unbalanced position may occur.

For the purpose of solving the above problem, Japanese Patent Application Laid-Open No. 60-4839 discloses a rotating angle detecting roller which is rotated around the shaft of a rotating body by contacting the rotating body. The rotation of the rotation angle detecting roller is transmitted to a rotary encoder via a belt, and the rotation angle of the rotating body is detected from an output signal of the rotary encoder. However, in this method, since a rotation position detecting device such as a rotary encoder is provided in contact with the rotating body, there is a problem that the rotary encoder has an effect on the measurement of the rotation angle of the rotating body.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotating body positioning device which can position a rotating body at a reference position without measuring the rotation angle of the rotating body from a reference position to a positioning position. is there. It is another object of the present invention to provide a rotating body unbalance correcting device that can accurately correct the amount of unbalance of a rotating body by accurately stopping the rotating body at a correction processing position.

[0008]

According to the first aspect of the present invention, the reference position created by the reference position creation means is shifted to the positioning position detected by the positioning position detection means, so that the rotating body is moved. Is the reference position, and it is not necessary to measure the rotation angle of the rotating body from the reference position to the positioning position as in the conventional method. Therefore, without the need for dogs, fiducial marks, etc.,
The rotating body can be positioned at the reference position without requiring a rotation position detecting device such as a rotary encoder. This makes it possible to accurately measure the positioning position of the rotating body itself, and suppress occurrence of malfunction.

According to the second aspect of the present invention, irregularities formed at equal intervals on the outer periphery of the rotating body at a position away from the rotating body are measured, and a pulse signal is generated based on the measured unevenness of the rotating body. Occurs. Then, one rotation signal of the rotating body is created based on the generated pulse signal, and a reference position during one rotation of the rotating body is created based on the created one rotation signal of the rotating body. Then, by shifting the created reference position to the positioning position detected by the positioning position detecting means, the rotating body can be apparently always positioned at the reference position.

According to the third aspect of the present invention, an unbalanced signal is generated in synchronization with the rotation cycle of the rotating body, and a single rotation signal of the rotating body is created based on the generated unbalanced signal. A reference position of the rotating body is created based on one rotation signal of the rotating body. Then, by shifting the created reference position to the positioning position detected by the positioning position detecting means, the rotating body can be apparently always positioned at the reference position.

According to the fourth aspect of the present invention, an unbalanced signal is generated in synchronization with the rotation period of the rotating body, and the reference position created by the reference position creation means is used as a reference based on the generated unbalanced signal. By detecting the unbalanced position of the rotating body, the unbalance amount of the rotating body can be accurately measured.

According to the fifth aspect of the invention, the reference position created by the reference position creation means is shifted to the unbalanced position detected by the unbalanced position detection means, so that the unbalanced position of the rotating body is obtained. Is the reference position. Then, when the reference position shifted from the unbalanced position matches the corrected processing position, the rotating body driving unit is stopped. Thereby, the rotating body can be rotated at the rotation angle where the unbalanced position and the corrected processing position coincide without the need for the dog, the reference mark, and the like, and without the need for the rotation position detecting device such as a rotary encoder. Since the stop can be accurately performed, the unbalance amount of the rotating body can be accurately corrected.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of Embodiment] FIGS. 1 to 8 show an embodiment of the present invention. FIG. 1 is a diagram showing a work imbalance correcting device, and FIG. 2 is a measurement control device. FIG. 3 is a diagram showing a correction processing step.

The work imbalance correcting device 1 generates vibration and noise during rotation when the work 2 which is a rotating body has a dynamic imbalance (hereinafter referred to as unbalance) exceeding an allowable limit (standard value). Since the efficiency and the life of the rotating electric machine provided with the work 2 are greatly reduced, the unbalance amount (the position and the size of the unbalance) of the work 2 are measured, and the unbalanced portion is corrected. System.

The work 2 is, for example, a rotor of a rotating electric machine such as an armature device of a motor or a field device of a generator, and a rotor core such as a rundle type pole core or a laminated core formed by laminating a plurality of plates made of a magnetic material. (Not shown),
An inspection target is constituted by a shaft 11 provided so as to protrude from both ends of the rotor core in the laminating direction, and a coil (not shown) wound around the rotor core. Irregularities are formed on the outer periphery of the work 2 at regular intervals.

Work imbalance correcting device 1 of the present embodiment
The unbalanced position measuring station 3 for measuring the unbalanced position of the work 2, the unbalanced correction station 4 for correcting and processing the unbalanced portion of the work 2, and the work from the unbalanced position measurement station 3 to the unbalanced correction station 4. And a work transfer mechanism (not shown) for transferring the work 2.

The unbalanced position measuring station 3 includes:
As shown in FIG. 1, a rotary power transmission device 5 for rotationally driving the work 2, a shake amount sensor 6 for generating an unbalance signal (analog signal) corresponding to the unbalance amount of the work 2, and a work 2 A rotation angle sensor 7 that detects the unevenness of the workpiece 2 and generates a pulse signal, and a measurement control device 8 that calculates the unbalance amount of the work 2 are provided.

The rotating power transmission device 5 corresponds to the rotating body driving means of the present invention, and transmits the rotating power of the driving motor 12 to the work 2 via the driving pulleys 13 to 15 and the driving belt 16. I do. The driving motor 12
Means that the work 2 is rotated at a constant rotational speed (for example, 1200 rpm).
m). In addition, the rotary power transmission device 5 causes the drive pulleys 14 and 15 to float the work 2 by an elastic deformation force of an elastic body (not shown) such as a coil spring. That is, when the rotational power is transmitted from the drive motor 12 via the drive belt 16, the work 2 oscillates (oscillates) with an amplitude corresponding to the unbalance amount in synchronization with the rotation cycle of the work 2.

The shake amount sensor 6 corresponds to the unbalanced signal generating means of the present invention.
By measuring the amount of deflection of the contact 17 that contacts the outer periphery of the workpiece 2, the amount of deflection (unbalanced signal) of the work 2 is detected, and the detected unbalanced signal is converted into an analog voltage and output to the measurement control device 8. I do. The unbalanced signal V of the analog voltage input from the shake amount sensor 6 to the measurement control device 8 is, for example, a sensor waveform (sine wave) as shown in FIG.
It is.

The rotation angle sensor 7 corresponds to the non-contact type pulse signal generating means of the present invention, and measures irregularities formed at equal intervals on the outer periphery of the work 2 at a position apart from the work 2. Based on the measured unevenness of the work 2, FIG.
The rotation angle (rotational position) of the work 2 is detected by generating a pulse signal as shown in FIG. As shown in FIG. 5, the rotation angle sensor 7 of the present embodiment outputs 21 pulses per rotation of the work 2.

The measurement control device 8 includes a motor drive circuit 21 for energizing the drive motor 12, a sensor waveform processing circuit 22 for processing a pulse signal input from the rotation angle sensor 7, and installation of an unbalanced position and the rotation angle sensor 7. It is composed of a measurement control circuit 23 for outputting a control signal to the motor drive circuit 21 so that the positions coincide with each other. The motor drive circuit 21 corresponds to the rotating body drive unit of the present invention, and outputs data such as the ON state and the OFF state of the drive motor 12 to the measurement control circuit 23.

The sensor waveform processing circuit 22 includes a frequency dividing circuit 2
4, a digital circuit incorporating a shift register 25 and a waveform switching device 26; The frequency dividing circuit 24 corresponds to a reference position generating means of the present invention, and performs one rotation of the work 2 based on frequency dividing data generated by a pulse signal input from the rotation angle sensor 7 as a pulse signal generating means. A reference position signal (divided waveform output: a divided signal as shown in FIGS. 4 and 5) B representing a certain reference position is created.

The shift register 25 corresponds to the reference position shifting means of the present invention, and is based on shift data created from the difference between the frequency-divided signal B input from the frequency dividing circuit 24 and the unbalanced position of the work 2. Then, the frequency-divided signal B corresponding to the reference position is shifted to the positioning position (unbalance occurrence position) M (shifted by three pulses in this example), and the positioning signal (positioning waveform output: reference position is output) as shown in FIG. Signal) C is created. The waveform switching device 26 is a mode switching unit that switches between an unbalance measurement mode and an unbalance correction mode based on a control signal from the measurement control circuit 23.

The measurement control circuit 23 corresponds to the unbalanced position detecting means of the present invention, and includes a CPU, a ROM, an RA
M, which itself is a microcomputer having a well-known structure, and based on the frequency-divided signal B generated by the frequency-dividing circuit 24, as shown in FIG. The position (unbalanced position, positioning position) M is detected.

More specifically, the measurement control circuit 23 includes the pulse signal A input from the rotation angle sensor 7 and the frequency dividing circuit 2
4, the unbalance amount of the work 2, that is, the unbalance amount of the work 2 is calculated based on the frequency-divided signal B input from 4 and the sine waveform unbalance signal V input from the shake amount sensor 6. The magnitude of the unbalance and the position of the unbalance of the work 2 are measured on the basis of. In this embodiment, as shown in FIGS. 4 and 5, the position where the peak of the unbalanced signal V and the pulse signal A overlap is defined as the unbalanced position of the workpiece 2 (the position where the unbalance occurs), that is, It is measured as a positioning position.

The measurement control circuit 23 corresponds to the rotating body stopping means of the present invention. When the positioning signal (reference position signal) C matches the corrected machining position signal, that is, the measurement signal is converted to the rotation angle. When the sensor 7 detects, a control signal is output to the motor drive circuit 21 so as to stop the drive motor 12.

The imbalance correction station 4 has the configuration shown in FIG.
As shown in (1), a correction drill 9 for removing the unbalanced portion of the work 2 and a correction control device (not shown) for automatically controlling the correction drill 9 are provided. . The correction drill 9 drills a hole 10 having a predetermined depth corresponding to the unbalanced size at the correction processing position of the work 2 (corresponding to the positioning signal C described above).
Note that the rotation angle sensor 7 is located at a position above the work 2 in the radial direction at the unbalanced position measuring station 3, that is, a position orthogonal to the horizontal direction so as to be at the same position as the correction processing position of the work 2. It is installed in.

The correction control device includes a CPU, a ROM, and a RAM.
Which is a microcomputer having a well-known structure and may be integrated with the measurement control circuit 23 of the measurement control device 8. This correction control device reads the unbalance amount (the size of the unbalance and the position of the unbalance) of the work 2 input from the measurement control circuit 23, creates a correction amount from the size of the unbalance, and creates the created correction. The correction drill 9 is controlled so that the hole 10 has a depth corresponding to the amount.

[Operation of Embodiment] Next, the operation of the work imbalance correcting apparatus 1 of the present embodiment will be briefly described with reference to FIGS. Here, FIG. 6 is a flowchart showing the control processing of the measurement control device and the correction control device.

When a start switch (not shown) is turned on after the work 2 for measuring the unbalance amount is set on the driving belt 16 of the unbalance position measuring station 3, first, input data and storage data are initialized. Is performed (step S1). Specifically, the count number is reset to 0 (count = 0), the rotation angle sensor 7 is set to output 21 pulses per rotation of the work 2 (N = 21), and the work 2 is rotated at a constant rotation speed. (Eg 1
Drive motor 12 so as to rotate at 200 rpm).
Set the output of In addition, a control signal is output to the motor drive circuit 21 so that the drive motor 12 operates, and the waveform switching device 26 is switched to the unbalanced measurement mode.

Next, it is determined whether or not the waveform switching device 26 has been switched to the unbalance measurement mode (step S2). If the result of this determination is YES, the subroutine of FIG. 7 is activated to control the output of the divided waveform (step S3). Next, it is determined whether or not the control processing of the divided waveform output has been completed (step S4). If the result of this determination is NO, the operation proceeds to the control processing of step S2.

If the decision result in the step S4 is YES, the waveform switching device 26 is switched to the imbalance correction mode (step S5). After that, step S2
To the control process of.

4 and FIG. 5 when the determination result of step S2 is NO, that is, when the waveform switching device 26 is switched to the unbalance correction mode.
As shown in (1), an unbalanced position (imbalance occurrence position) M of the work 2 is calculated from the position where the peak of the unbalanced signal V and the pulse signal A overlap (step S).
6).

Next, the frequency-divided signal B created in step S3
The shift data is created from the difference between the data and the unbalance occurrence position M of the work 2 (step S7). Specifically, shift data (shift amount for three pulses) is calculated from the difference between the frequency-divided signal B (pulse 0) as the reference position and the pulse 3 corresponding to the unbalance occurrence position M.

Next, the subroutine shown in FIG. 8 is started, and the control processing of the positioning waveform output is performed (step S8). Next, it is determined whether or not the control processing of the positioning waveform output has been completed (step S9). If the result of this determination is NO, the operation proceeds to the control processing of step S2.

If the decision result in the step S9 is YES, it is determined whether or not the positioning signal (reference position signal) C created in the step S8 and the corrected machining position signal match. That is, it is determined whether or not the rotation angle sensor 7 detects the rotation position of the work 2 corresponding to the positioning signal C (step S10). If the result of this determination is NO, the control process of step S10 is repeated.

If the result of the determination in step S10 is YES
In the case of (1), a control signal is output to the motor drive circuit 21 so as to stop the drive motor 12 (step S1).
1). Next, the work transfer mechanism is operated to transfer the work 2 from the unbalance position measuring station 3 to the unbalance correction station 4 (step S12).

Next, the amount of unbalance (the size of the unbalance and the position of the unbalance) of the work 2 is input, and a correction amount is created from the size of the unbalance (step S1).
3). Next, the correction drill 9 is controlled so that the hole 10 has a depth corresponding to the correction amount created in step S13, and a removal process for removing an unbalanced portion of the work 2 is performed (step S14). . Thereafter, all the controls are ended (END).

Next, a description will be given of a process of controlling a divided waveform output based on the subroutine of FIG. First, it is determined whether the rising of the rotation angle sensor 7 is detected. That is, it is determined whether a pulse signal has been input from the rotation angle sensor 7 (step S21). This determination result is N
In the case of O, the process exits the subroutine of FIG.

If the result of the determination in step S21 is YES
In the case of (1), the number of times of inputting the pulse signal input from the rotation angle sensor 7 is counted as shown in the following equation (Step S22).

## EQU1 ## count = count + 1

Next, it is determined whether or not the number of times of pulse signal input (the number of counts) exceeds N (the number of 21 pulses) (step S23). If the result of this determination is NO, the operation proceeds to the control processing of step S26.

If the result of the determination in step S23 is YES
In the case of, the input number (count number) of the pulse signal is set to 0.
(Step S24). Next, the frequency dividing circuit 2
4 outputs “1” to the output port B to the shift register 25 and the measurement control circuit 23 (step S25).
Next, it is determined whether or not the number of times the pulse signal has been input (the number of counts) is 1 (step S26). If this determination is NO, the process exits the subroutine of FIG.

If the result of the determination in step S26 is YES
In this case, "0" is output from the frequency dividing circuit 24 to the output port B to the shift register 25 and the measurement control circuit 23 (step S27). Thereafter, the process exits the subroutine of FIG. By the above control processing, the frequency-divided waveforms (output waveforms of the frequency-divided signal B output from the output port B of the frequency divider 24) shown in FIGS. 4 and 5 are obtained.

Next, the control processing of the positioning waveform output will be described based on the subroutine of FIG. First, it is determined whether the rising of the rotation angle sensor 7 is detected. That is, it is determined whether a pulse signal has been input from the rotation angle sensor 7 (step S31). If the result of this determination is NO, the subroutine of FIG. 8 is exited.

In addition, the decision result in the step S31 is YES.
In the case of (2), the number of times of input of the pulse signal input from the rotation angle sensor 7 is counted as shown in the following equation (step S32).

## EQU2 ## count = count + 1

Next, it is determined whether or not the number of pulse signal inputs (the number of counts) has exceeded N (the number of 21 pulses) (step S33). If this determination is NO, the flow proceeds to the control processing of step S35.

If the result of the determination in step S33 is YES
In the case of, the input number (count number) of the pulse signal is set to 0.
(Step S34). Next, it is determined whether or not the number of times of pulse signal input (count) is (M-1) (step S35). If this determination is NO, the flow proceeds to the control processing in step S37.

If the result of the determination in step S35 is YES
In the case of, the measurement control circuit 23
"1" is output to the output port C (step S3).
6). Next, if the number of times of pulse signal input (count) is M
It is determined whether the current position is an imbalance occurrence position, an unbalanced position, or a positioning position (step S37). If the result of this determination is NO, the subroutine of FIG. 8 is exited.

If the decision result in the step S37 is YES
In the case of, the measurement control circuit 23
Is output to the output port C (step S3).
8). Thereafter, the process exits the subroutine of FIG. By the above control processing, the positioning waveform (output waveform of positioning signal C output from output port C of shift register 25) shown in FIG. 5 is obtained.

[Effects of the Embodiment] As described above, the work imbalance correcting apparatus 1 of the present embodiment detects the unevenness of the outer periphery of the work 2 at equal intervals when correcting the imbalance of the work 2, and generates 21 pulses. By generating a one-rotation signal from a pulse signal and generating a frequency-divided signal as a reference position signal based on the signal, the unbalance amount of the work 2 can be measured without requiring a dog, a reference mark, or the like. Thereby, the position and the magnitude of the unbalance of the work 2 itself can be accurately measured.

Further, when correcting the measured imbalance, the reference position (divided output waveform) is electrically shifted to the positioning position (unbalance occurrence position), thereby apparently positioning at the reference position. (Stop work 2). Thereby, it is not necessary to measure the rotation angle of the work from the reference position to the positioning position unlike the conventional method. Therefore, the workpiece 2 can be positioned at the unbalance occurrence position without requiring a dog, a reference mark, and the like, and without requiring a rotation position detecting device such as a rotary encoder. Thereby, the measurement of the positioning position of the work 2 itself can be performed with high accuracy.

Further, in the present embodiment, prior to the unbalance measuring step and the unbalance correcting step for measuring the unbalance of the work 2, the mark attaching step of attaching the reference mark to the outer peripheral surface of the work 2 is not required. Work time can be reduced. Further, since the unbalance amount can be measured without detecting the reference mark, the unbalance position of the work 2 can be accurately measured, and a malfunction such as cutting a position different from the actual unbalance position may occur. There is no sex.

Further, without requiring a dog, a reference mark or the like, and without requiring a rotation position detecting device such as a rotary encoder or the like, the work 2 is rotated at an unbalanced position and a corrected processing position. Can be stopped exactly at the corner. Thus, the work 2 can be accurately corrected by the correction amount corresponding to the unbalance amount (the size and the position of the unbalance) of the work 2.

[Other Embodiments] In the present embodiment, only the measurement control circuit 23 of the measurement control device 8 is constituted by a microcomputer, but both the sensor waveform processing circuit 22 and the measurement control circuit 23 of the measurement control device 8 are used. Each may be constituted by a microcomputer. Further, the sensor waveform processing circuit 22 and the measurement control circuit 23 may be constituted by one microcomputer.

In the present embodiment, the work 2 having the unevenness formed at equal intervals on the outer circumference is used as the rotating body, but a work having a flat outer circumferential surface (circular outer circumferential shape) is used as the rotating body. Is also good. In this case, the reference position creating means is provided with an unbalanced signal generating means such as a shake amount sensor 6 for generating an unbalanced signal synchronized with the rotation cycle of the work. One rotation signal of the work may be created based on the touching amount (unbalance signal), and a reference position (divided signal) of the work may be created based on the created one rotation signal of the work.

In the present embodiment, the non-contact type rotation angle sensor 7 is used as the pulse signal generating means, but a contact type rotation angle sensor may be used as the pulse signal generating means. In the present embodiment, the work 2 is positioned at the unbalance position measuring station 3, but the work 2 may be positioned at the unbalance correction station 4. In the present embodiment, the present invention is applied to the work imbalance correcting device 1, but the present invention may be applied to a rotating body positioning device that determines a certain positioning position during one rotation of the rotating body.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a work imbalance correcting device (Embodiment).

FIG. 2 is a circuit diagram showing a measurement control device (Embodiment).

FIG. 3 is a perspective view showing a modification processing step (embodiment).

FIGS. 4A, 4B, and 4V are explanatory diagrams showing signal waveforms used in a sensor waveform processing circuit and a control circuit (embodiment).

FIGS. 5A, 5B, and 5C are explanatory diagrams showing signal waveforms used in a sensor waveform processing circuit and a control circuit (embodiment);

FIG. 6 is a flowchart illustrating a control process of the measurement control device and the correction control device (the embodiment).

FIG. 7 is a subroutine showing a process of controlling a divided waveform output by a divider circuit (embodiment);

FIG. 8 is a subroutine showing control processing of positioning waveform output by a shift register (embodiment).

[Explanation of symbols]

1 Work imbalance correction device (rotary body positioning device,
Rotating body unbalance correcting device) 2 Workpiece (rotating body) 3 Unbalance position measuring station 4 Unbalance correcting station 5 Rotary power transmission device (rotating body driving means) 6 Shake amount sensor (unbalance signal generating means, positioning position detecting means) 7) Rotation angle sensor (non-contact type pulse signal generating means) 9 Correcting drill 22 Sensor waveform processing circuit 23 Measurement control circuit (Rotating body stopping means, unbalanced position detecting means, positioning position detecting means) 24 Dividing circuit (reference) Position creating means) 25 shift register (reference position shifting means)

Claims (5)

[Claims] (A) rotating body driving means for rotating a rotating body at a constant rotation speed; and (b) generating a reference position during one rotation of the rotating body based on the rotation of the rotating body. Reference position creating means; (c) a positioning position detecting means for detecting a positioning position of the rotating body; and (d) the reference position created by the reference position creating means is detected by the positioning position detecting means. A rotating body positioning device comprising: a reference position shifting means for shifting to the positioning position. 2. The rotating body positioning apparatus according to claim 1, wherein the rotating body has an uneven shape with an outer peripheral surface at an equal interval, and the reference position creating means rotates the rotating body at a position apart from the rotating body. It has a non-contact type pulse signal generating means for measuring the unevenness of the body and generating a pulse signal based on the measured unevenness of the rotating body, and based on the pulse signal generated by the pulse signal generating means. A rotating body positioning device, wherein one rotating signal of the rotating body is created, and a reference position of the rotating body is created based on the created one rotating signal of the rotating body. 3. The rotating body positioning device according to claim 1, wherein the rotating body has a circular outer peripheral surface, and the reference position creating means is synchronized with a rotation cycle of the rotating body. An unbalanced signal generating means for generating an unbalanced signal; generating one rotation signal of the rotating body based on the unbalanced signal generated by the unbalanced signal generating means; A rotating body positioning device, wherein a reference position of the rotating body is created based on a rotation signal. 4. The rotating body positioning device according to claim 1, wherein said positioning position detecting means has an unbalanced signal generating means for generating an unbalanced signal synchronized with a rotation cycle of said rotating body. Detecting an unbalanced position of the rotating body as the positioning position based on the reference position created by the reference position creation unit, based on the unbalance signal generated by the unbalance signal generation unit. A rotating body positioning device. 5. A rotating body driving means for rotating the rotating body at a constant rotation speed, and b. Creating a reference position during one rotation of the rotating body based on the rotation of the rotating body. Reference position creating means; (c) an unbalanced position detecting means for detecting an unbalanced position of the rotating body; and (d) the reference position created by the reference position creating means is provided to the unbalanced position detecting means. (E) a rotation for stopping the rotation driving means when the reference position shifted by the reference position shifting means coincides with the corrected machining position. A rotating body imbalance correcting device comprising a body stopping means.