JP2023151790A - Method for manufacturing rotor - Google Patents

Abstract

To provide a method capable of determining a correct rotation direction of a rotor core more easily than before in manufacturing a rotor of a rotary electric machine.SOLUTION: A method for manufacturing a rotor according to an embodiment inserts a shaft in a predetermined direction into a rotor core in which at least one pattern in which a temporal fluctuation pattern of the height of an outer peripheral surface changes is formed on the outer peripheral surface in the case of determining a first direction to be rotated in use and in the case of rotating in a second direction being an opposite direction from the first direction, fixes the shaft with respect to the rotor core to assemble the rotor, supports the rotor by a support stand in a freely rotatable manner, detects a temporal change in the height of the outer peripheral surface of the rotor core by using a laser displacement gauge while rotating the rotor core in a prescribed direction by the support stand, and determines whether the prescribed direction is the first direction or the second direction by using an information processing device on the basis of the detected temporal change and temporal change to be reference.SELECTED DRAWING: Figure 8

Description

Embodiments of the present invention relate to a method of manufacturing a rotor for a rotating electric machine.

Some rotor cores of rotors of rotating electric machines have grooves formed on their outer circumferential surfaces for noiseless and magnetic design, and whose cross sections in the rotation axis direction are asymmetrical with respect to the central axis of the cross sections. In such a rotor core, the direction of rotation when used is determined in advance. Moreover, a groove for connecting to a load is formed in the shaft assembled to the rotor core. For this reason, it is necessary to assemble the shaft in the correct orientation relative to the rotor core in both the upper and lower directions of the rotation axis.

However, it is difficult to determine the correct rotational direction of the rotor core just by checking the external appearance with the naked eye.

The problem to be solved by the present invention is to provide a method that can more easily determine the correct rotational direction of a rotor core in manufacturing a rotor for a rotating electric machine than in the past.

A method for manufacturing a rotor according to an embodiment includes a case in which a first direction in which the rotor should be rotated is determined in use and the rotor is rotated in the first direction, and a case in which the rotor is rotated in a second direction opposite to the first direction. A shaft is inserted in a predetermined direction into a rotor core having at least one pattern formed on the outer circumferential surface in which the temporal variation pattern of the height of the outer circumferential surface changes depending on when the shaft is inserted into the rotor core. The rotor is assembled by fixing the shaft, the rotor is rotatably supported by a support base, and while the rotor core is rotated in a predetermined direction by the support base, the rotation is measured using a laser displacement meter. A temporal change in the height of the outer circumferential surface of the child core is detected, and an information processing device is used to determine whether the predetermined direction is the first direction based on the detected temporal change and a reference temporal change. or the second direction.

FIG. 1 is an external view of a rotor of a rotating electric machine according to an embodiment. FIG. 2 is a diagram showing an example of the outer peripheral surface of the rotor core of the rotor according to the embodiment. FIG. 3 is a flowchart showing the flow of the rotor manufacturing method according to the embodiment. FIG. 4 is a diagram for explaining a pre-assembly inspection of the rotor according to the embodiment. FIG. 5 is a diagram for explaining a pre-assembly inspection of the rotor according to the embodiment. FIG. 6 is a diagram for explaining the configuration of an inspection system for post-assembly inspection of a rotor according to an embodiment. FIG. 7 is a flowchart showing the flow of post-assembly inspection of the rotor according to the embodiment. FIG. 8 is a diagram for explaining the operation of measuring the height of the outer circumferential surface of the rotor using a laser displacement meter. FIG. 9 is a diagram showing an example of a temporal change in the height of the outer circumferential surface acquired by the laser displacement meter. Figure 10. 10 is an enlarged view of region R of the measurement data (temporal change in outer circumferential surface height) shown in FIG. 9. FIG. FIG. 11 is a diagram showing an example of binarized measurement data. FIG. 12 is a diagram for explaining an algorithm of determination processing executed by the information processing device. FIG. 13 is a diagram for explaining the test data extraction process in step S362 in FIG. 12. FIG. 14 is a diagram for explaining the test data extraction process in step S362 in FIG. 12. FIG. 15 is a diagram for explaining the test data extraction process in step S362 in FIG. 12. FIG. 16 is a diagram for explaining the test data extraction process in step S362 of FIG. 12. FIG. 17 is a diagram for explaining the determination process in step S365 of FIG. 12. FIG. 18 is a diagram showing an example of a pattern formed on the outer peripheral surface of a rotor core of a rotor according to a modification. FIG. 19 is a diagram showing another pattern example formed on the outer peripheral surface of the rotor core 12 of the rotor 1 according to the modification. FIG. 20 is a diagram for explaining the acquisition range of measurement data when a plurality of patterns are formed on the outer peripheral surface of the rotor core 12. FIG. 21 is a diagram for explaining the acquisition range of measurement data when one pattern is formed on the outer peripheral surface of the rotor core 12.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the rotor of the rotating electrical machine and its manufacturing method concerning embodiment are demonstrated. In the following embodiments, parts with the same reference numerals perform similar operations, and redundant explanations will be omitted as appropriate. The following embodiments are not intended to limit the disclosed technology. Each of the embodiments can be combined as appropriate within a range that does not conflict with the processing contents.

FIG. 1 is an external view of a rotor 1 of a rotating electric machine according to an embodiment. As shown in FIG. 1, the rotor 1 includes a shaft 10, a rotor core 12, a first end plate 16A, a second end plate 16B, and a nut 18.

The shaft 10 supports the rotor core 12 and has a cylindrical shape that is rotatable around the central axis D. The shaft 10 is attached coaxially to a rotor core 12 having a cylindrical shape about a central axis. A groove is formed in one end of the shaft 10 for connection with a load. In the following description, the extending direction of the central axis D will be referred to as the axial direction, the direction of rotation around the central axis D will be referred to as the circumferential direction, and the direction orthogonal to the axial direction and the circumferential direction will be referred to as the radial direction.

The rotor core 12 is formed into a cylindrical shape by concentrically laminating a plurality of magnetic plates, for example, annular electromagnetic steel plates such as silicon steel. At least one groove is formed on the outer peripheral surface of the rotor core 12 in order to exhibit predetermined rotational characteristics (vibration characteristics, efficiency, torque, etc.), or magnets are arranged asymmetrically with respect to the d-axis. Due to this at least one groove, the cross section of the rotor core 12 in the rotational axis direction is asymmetrical with respect to the central axis of the cross section. Furthermore, in order to exhibit the above-mentioned rotational characteristics, the direction in which the rotor core 12 should rotate during use (first direction) is determined in advance. Therefore, in order to rotate the rotor core 12 in the first direction, the shaft 10 needs to be assembled in the correct orientation with respect to the rotor core 12 with respect to the upper and lower directions of the rotation axis.

The outer circumferential surface of the rotor core 12 has a pattern for determining the direction in which the rotor 1 should rotate when it is used, in other words, a pattern for determining whether the shaft 10 is up or down in the axial direction with respect to the rotor core 12. At least one is formed. This pattern differs when the rotor 1 is rotated in the direction in which it should be rotated in use (first direction) and when it is rotated in a direction opposite to the first direction (second direction). , is formed so that the temporal variation pattern of the height of the outer circumferential surface changes. In addition, in this embodiment, the case where several patterns are formed in the outer peripheral surface of the rotor core 12 is taken as an example. Further, in FIG. 1, patterns A, B, and C of the outer peripheral surface of the rotor core 12 are illustrated. A specific example of the pattern will be explained in detail later.

The first end plate 16A and the second end plate 16B are arranged at both axial ends of the rotor core 12 attached to the shaft 10, and hold the rotor core 12 at a predetermined position in the axial direction of the shaft 10. The nuts 18 are arranged at both ends of the first end plate 16A in the axial direction, and hold the first end plate 16A at a predetermined position in the axial direction of the shaft 10.

FIG. 2 is a diagram showing an example of the outer peripheral surface of the rotor core 12 of the rotor 1 according to the embodiment. As shown in FIG. 2, a groove pattern including a plurality of grooves 14B1, grooves 14B2, and grooves 14B3 is formed on the outer peripheral surface of the rotor core 12 as a pattern B for determining the rotation direction. Note that in FIG. 2, only grooves 14B1, 14B2, and 14B3 as pattern B are illustrated. Further, it is assumed that the correct rotational direction of the rotor core 12 is, for example, the direction indicated by the arrow AR in FIG.

The groove 14B1, the groove 14B2, and the groove 14B3 are formed so that the length W2 of the outer circumference between the groove 14B1 and the groove 14B2 is different from the length W1 of the outer circumference between the groove 14B2 and the groove 14B3 (W1 <W2). Therefore, when observing one point (predetermined position) on the outer circumference of the rotating rotor core 12, the time interval (period) at which grooves appear is different from that when the rotor core 12 rotates in the first radial direction. It differs depending on the rotation in the second direction.

Regarding the patterns A, B, and C of the outer circumferential surface of the rotor core 12, the height of the outer circumferential surface is different when the rotor 1 is rotated in the first direction and when it is rotated in the second direction. Any pattern may be used as long as it is formed so that the temporal variation pattern of is changed. For example, patterns A, B, and C may be different groove patterns, or at least two of patterns A, B, and C may be the same groove pattern.

FIG. 3 is a flowchart showing the flow of the method for manufacturing the rotor 1 according to the embodiment. As shown in FIG. 3, the method for manufacturing the rotor 1 includes a visual inspection before rotor assembly (step S1), a rotor assembly (step S2), and a visual inspection after rotor assembly (step S3).

In the visual inspection before rotor assembly in step S1, when assembling the shaft 10 to the rotor core 12, the correct rotational direction of the rotor core 12 is determined by the visual inspection. In the rotor assembly of step S2, the shaft 10 is assembled to the rotor core 12 in a predetermined direction based on the rotational direction of the rotor core 12 determined by the visual inspection before rotor assembly. In the visual inspection after rotor assembly in step S3, the rotor 1 is actually rotated, and it is determined whether the shaft 10 is assembled in the correct direction with respect to the rotor core 12. The processing in each step will be explained below.

[Appearance inspection before rotor assembly: Step S1]
4 and 5 are diagrams for explaining a pre-assembly inspection of the rotor 1 according to the embodiment. FIG. 4 shows the rotor core 12 of the rotor 1 and a pattern B gauge 30 used for pre-assembly inspection. FIG. 5 shows the rotor core 12 installed in a predetermined orientation on the first support stand 20 based on a pre-assembly inspection. The pattern B gauge 30 has a groove pattern 301, a groove pattern 302, and a groove pattern 303 corresponding to the grooves 14B1, 14B2, and 14B3 of the rotor core 12. Further, an arrow 304 of the pattern B gauge 30 indicates the correct rotation direction of the rotor core 12.

In the pre-assembly inspection of the rotor 1, by making the groove pattern of the pattern B gauge 30 correspond to the pattern B on the outer peripheral surface of the rotor core 12, the rotation is determined by the arrow 304 shown on the pattern B gauge 30. The correct rotation direction of the child core 12 can be determined. The rotor core 12 is installed on the first support stand 20 in a predetermined orientation as shown in FIG. 5 based on the determination result of the pattern B gauge 30.

[Rotor assembly: Step S2]
The shaft 10 to which the second end plate 16B is fixed is inserted from one end in the axial direction of the rotor core 12 installed on the first support stand 20 in a predetermined direction, with the shaft 10 oriented vertically in the axial direction. A first end plate 16A is fixed to the shaft 10 inserted into the rotor core 12 from the other end of the rotor core 12 in the axial direction. The rotor 1 is assembled by tightening the first end plate 16A with the nut 18.

[Appearance inspection after rotor assembly: Step S3]
FIG. 6 is a diagram for explaining the configuration of an inspection system S for post-assembly inspection of a rotor according to an embodiment.

As shown in FIG. 6, the inspection system S includes a rotor 1, a second support 40, a laser displacement meter 42, and an information processing device 44. The second support stand 40 supports the rotor 1 and rotates the rotor 1 in a predetermined direction. The laser displacement meter 42 is installed, for example, between the second support base 40 and the outer peripheral surface of the rotor core 12. The laser displacement meter 42 measures temporal changes in the height L of the outer circumferential surface of the rotor 1 (for example, temporal changes in the distance from the outer circumferential surface of the rotor 1) using laser light. The information processing device 44 is, for example, a computer. The information processing device 44 determines whether the orientation of the shaft 10 with respect to the rotor core 12 is appropriate based on the output from the laser displacement meter 42.

FIG. 7 is a flowchart showing the flow of post-assembly inspection of the rotor 1 according to the embodiment. As shown in FIG. 7, first, the second support base 40 rotates the rotor 1 in a predetermined direction at, for example, N [rpm] (step S31).

Next, the laser displacement meter 42 starts measuring the height L of the outer peripheral surface of the rotor core 12 of the rotor 1 (step S32).

FIG. 8 is a diagram for explaining the operation of measuring the outer circumferential surface height L of the rotor 1 by the laser displacement meter 42, and is a simplified diagram of the inspection system S viewed from the axial direction. As shown in FIG. 8, a laser beam LA1 is irradiated from the laser displacement meter 42 to the outer circumferential surface of the rotor 1 rotating at N [rpm], and the outer circumferential surface of the rotor 1 is The laser beam LA2 reflected at is received.

Returning to FIG. 7, the laser displacement meter 42 collects information on the outer circumferential surface height (temporal change in the outer circumferential surface height L) of the rotor 1 for N seconds (one rotation) or more based on the received laser beam LA2. Measure (step S33).

The second support stand 40 stops the rotation of the rotor 1 (step S34).

The information processing device 44 binarizes the temporal change in the outer circumferential surface height L obtained by the measurement using the determination value Lth (threshold Lth) (step S34).

FIG. 9 is a diagram showing an example of a temporal change in the outer circumferential surface height L acquired by the laser displacement meter 42. As shown in FIG. 9, the laser displacement meter 42 acquires a temporal change in the distance between the rotor 1 and the outer circumferential surface as a temporal change in the outer circumferential surface height L of the rotor 1. 44.

FIG. 10 is an enlarged view of the range T of the measurement data (temporal change in outer circumferential surface height L) shown in FIG. FIG. 11 is a diagram showing an example of binarized measurement data. The information processing device 44 binarizes as "0" when the outer circumferential surface height L<judgment value Lth at each time, and as "1" when the outer circumferential surface height L≧judgment value Lth at each time. . As a result, the temporal change in the outer circumferential surface height L shown in FIG. 9 generates, for example, N-bit binarized measurement data (binarized data) shown in FIG. 11.

The information processing device 44 determines whether predetermined reference data exists in the binarized data (step S36). Note that the determination process in this step will be explained in detail later.

If the information processing device 44 determines that the reference data exists in the binarized data (Yes in step S36), it outputs a message that the shaft 10 is properly assembled to the rotor core 12 (step S37). ).

If the information processing device 44 does not determine that the reference data exists in the binarized data (No in step S36), it outputs a message that the shaft 10 is inappropriately assembled to the rotor core 12 (step S36). S38).

[Judgment processing algorithm]
FIG. 12 is a diagram for explaining the algorithm of the determination process executed by the information processing device 44. As shown in FIG. 12, the information processing device 44 first obtains measurement data (N-bit array) from the laser displacement meter 42 (step S360).

The information processing device 44 sets K=0 for the parameter K for extracting inspection data from the acquired measurement data (N-bit array) (step S361). Note that the parameter K indicates the start data position for extracting inspection data from the measurement data (N-bit array).

The information processing device 44 generates a data array from the Kth (in this case, K=0th) to the M+Kth (in this case, the Mth because K=0) out of the acquired measurement data (N bit array). , and extracted as inspection data (step S362). Note that M is a parameter representing the length of test data, and M and K are natural numbers satisfying N>M and N>K.

FIG. 13 is a diagram for explaining the test data extraction process in step S362 in FIG. 12. As shown in FIG. 13, the information processing device 44 selects the measured data (N-bit array) from the Kth (K=4th in the example of FIG. 13) to the M+Kth (M=24 in the example of FIG. 13). The data array up to (M+K=27th) is extracted as test data.

The information processing device 44 performs an XOR (exclusive OR) on the reference data and the test data to calculate result data (step SS363). Here, the reference data is a pattern B that is prepared in advance and appears when the time change in the height L of the outer peripheral surface of the rotor core 12 is measured when the rotor core 12 is rotated in the correct rotation direction. This shows the binarized data of .

14, FIG. 15, and FIG. 16 are diagrams for explaining the test data extraction process in step S362 of FIG. 12. FIG. 14 shows an arithmetic circuit 50 included in the information processing device 44. FIG. 15 is a table showing the arithmetic logic (XOR) executed by the arithmetic circuit 50. FIG. 16 is a diagram showing an example of arithmetic processing executed by the arithmetic circuit 50 and result data.

As shown in FIG. 14, the arithmetic circuit 50 receives reference data in an M-bit array and test data in an M-bit array, and outputs result data in an M-bit array. That is, the arithmetic circuit 50 takes, for example, the reference data of the M-bit array as an input value A, and the test data of the M-bit array as an input value B, executes the computation according to the table shown in FIG. 15, and outputs the result data of the M-bit array. do.

For example, in FIG. 16, the 0th bit test data is "0" and the determination data is "0", so the result data is "0" according to the table shown in FIG. 15. Furthermore, since the 1st bit of test data is "0" and the judgment data is "1", the result data becomes "1" according to the table shown in FIG. 15. The arithmetic circuit 50 of the information processing device 44 executes such arithmetic operations up to the M-th bit, and outputs result data in an M-bit array.

The information processing device 44 calculates the sum (S=Σ ^m _i=0 result data (i)) of all bit values of the result data (M-bit array) (step S364).

The information processing device 44 calculates the sum S of all bit values of the result data, and determines whether the obtained sum S is 0 or not (step S365).

FIG. 17 is a diagram for explaining the determination process in step S365 of FIG. 12. As shown in FIG. 17, the information processing device 44 calculates S=0+1+1+1+1+0+0+0+1+0+0+1+0+0+0+0+1+1+0+0+1+1+1+0=11 as the sum S of all bit values of the result data. In the example of FIG. 17, the information processing device 44 determines that the obtained sum S is not zero.

If the reference data of the M-bit array and the test data of the M-bit array completely match, then according to the arithmetic logic shown in FIG. 15, all values of the output result data of the M-bit array will be " 0". Therefore, when the information processing device 44 determines that the sum S of all bit values of the result data is 0 (Yes in step S365), the information processing device 44 determines that the shaft 10 is relative to the rotor core 12 as a determination result. and outputs a determination result indicating that it is assembled in the correct direction (step S37).

If the information processing device 44 determines that the sum S of all bit values of the result data is not 0 (No in step S365), the information processing device 44 determines whether M+K exceeds N (step S368). ). When the information processing device 44 determines that M+K does not exceed N (Yes in step S368), it increments K to K+1 (step S367) and repeatedly executes the processes from step S362 to step S365. On the other hand, if the information processing device 44 determines that M+K exceeds N (No in step S368), the information processing device 44 determines that the shaft 10 is not assembled in the correct direction with respect to the rotor core 12 as a determination result. Output (step S38).

As described above, the rotor 1 according to the embodiment has a first direction in which it should be rotated during use, and a case in which it is rotated in the first direction and a second direction which is the opposite direction to the first direction. The rotor core 12 includes a rotor core 12 in which at least one pattern is formed on the outer circumferential surface so that the temporal variation pattern of the height of the outer circumferential surface changes depending on when the rotor core 12 is rotated in the direction. In the method for manufacturing the rotor 1 according to the embodiment, the shaft 10 is inserted into the rotor core 12 in a predetermined direction, the shaft 10 is fixed to the rotor core 12, and the rotor 1 is assembled. The rotor 1 is rotatably supported by a second support 40, and while the rotor core 14 is rotated in a predetermined direction by the second support 40, the outer circumference of the rotor core 12 is measured using a laser displacement meter 42. Detect temporal changes in surface height. Based on the detected temporal change and the reference temporal change, the information processing device 44 is used to determine whether the predetermined direction is the first direction or the second direction.

Therefore, using the pattern formed on the outer circumferential surface of the rotor core 12 of the rotor 1, the shaft 10 can be rotated in the correct direction by visual inspection for the rotor core 12, which direction is determined in use. It can be determined whether or not it has been assembled. As a result, shipping and installation of the rotor 1 in which the shaft 10 is incorrectly assembled to the rotor core 12 can be suppressed.

As described above, in the method for manufacturing the rotor 1 according to the embodiment, the rotor core 12 is supported by the first support 20, and the first support 20 supports at least one pattern of the rotor core 12 and a reference pattern. The first direction of the rotor core 12 supported by the first support stand 20 is determined by comparing the two directions. The shaft 10 is inserted into the rotor core 12 in a predetermined direction based on the determined first direction, and the shaft 10 is fixed to the rotor core 12 to assemble the rotor 1.

Therefore, by using the pattern formed on the outer circumferential surface of the rotor core 12 of the rotor 1 and performing an appearance inspection before assembling the shaft 10 to the rotor core 12, it is possible to determine whether the rotor core 12 is used before the shaft 10 is assembled. The direction in which to rotate can be determined. As a result, incorrect assembly of the shaft 10 to the rotor core 12 can be suppressed.

(Modification 1)
In the above embodiment, the grooves 301, 302, and 303 are illustrated as examples of the patterns A, B, and C formed on the outer peripheral surface of the rotor core 12, but these are merely examples, and patterns of other aspects may be used. It is also possible to adopt

FIG. 18 is a diagram showing an example of a pattern formed on the outer peripheral surface of the rotor core 12 of the rotor 1 according to a modification. As pattern B, grooves 14B4, 14B5, and 14B6 having different widths W3, W4, and W5 in the circumferential direction can also be formed. In addition, in the example of FIG. 18, the case where W3>W4>W5 was illustrated.

FIG. 19 is a diagram showing another pattern example formed on the outer peripheral surface of the rotor core 12 of the rotor 1 according to the modification. As pattern B, a plurality of convex portions having different arc lengths are formed. In addition, in FIG. 19, three convex parts 14B7, 14B8, and 14B9 are illustrated.

Regardless of the configuration, the outer circumferential surface of the rotor core 12 has a pattern in which the height of the outer circumferential surface changes over time depending on when the rotor 1 rotates in one circumferential direction and when the rotor 1 rotates in the other direction. can be formed.

(Modification 2)
In the embodiment described above, in the inspection after rotor assembly, the temporal change in the height L of the outer circumferential surface of the rotor core 12 was measured for a period of one or more revolutions of the rotor core 12. However, the period for measuring the temporal change in the height L of the outer circumferential surface of the rotor core 12 can be further shortened.

FIG. 20 is a diagram for explaining the acquisition range of measurement data when a plurality of patterns are formed on the outer peripheral surface of the rotor core 12, and is a simplified diagram of the rotor core 12 viewed from the axial direction. be. As shown in FIG. 20, the circumferential length of each of the plurality of patterns provided on the outer periphery of the rotor core 12 is R1, and the longest circumferential length among the pattern intervals RD1, RD2, and RD3 is RD3. In this case, the range RDT for acquiring measurement data may be any range that satisfies RDT≧(2R1+RD3).

FIG. 21 is a diagram for explaining the acquisition range of measurement data when one pattern is formed on the outer peripheral surface of the rotor core 12, and is a simplified diagram of the rotor core 12 viewed from the axial direction. be. As shown in FIG. 21, when one pattern is formed on the outer peripheral surface of the rotor core 12, the pattern interval is RD4. Note that when one pattern is formed on the outer circumferential surface of the rotor core 12, the temporal change in the height L of the outer circumferential surface of the rotor core 12 requires at least one rotation.

By setting the range RDT for acquiring measurement data to the above range, it is possible to reliably include one or more continuous patterns within the measurement data.

(Modification 3)
In the embodiment described above, at least one groove is formed on the outer circumferential surface of the rotor core 12 in order to exhibit predetermined rotational characteristics, and a pattern is used to determine the direction in which the rotor 1 should rotate when used. Explained separately. On the other hand, it is also possible to form a pattern for determining the direction in which the rotor 1 should rotate when it is used, using grooves for exhibiting predetermined rotational characteristics.

Although several embodiments (and modifications) of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, changes, and combinations can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

1 Rotor 10 Shaft 12 Rotor core 14B1, 14B2, 14B3, 14B4, 14B5, 14B6 Groove 14B7, 14B8, 14B9 Convex portion 16A First end plate 16B Second end plate 18 Nut 20 First support stand 40 Second support stand 42 Laser displacement meter 44 Information processing device 301, 302, 303 Groove pattern 30 Gauge for pattern B

Claims (2)

In use, a first direction to be rotated is determined, and the height of the outer circumferential surface is determined depending on whether it is rotated in the first direction or in a second direction that is opposite to the first direction. Inserting the shaft in a predetermined direction into a rotor core in which at least one pattern in which the temporal variation pattern changes is formed on the outer peripheral surface,
assembling a rotor by fixing the shaft to the rotor core;
The rotor is rotatably supported by a support base,
While rotating the rotor core in a predetermined direction by the support base, detecting a temporal change in the height of the outer peripheral surface of the rotor core using a laser displacement meter,
determining whether the predetermined direction is the first direction or the second direction using an information processing device based on the detected temporal change and a reference temporal change;
A method for manufacturing a rotor with. A first direction to be rotated in use is determined, and the height of the outer peripheral surface when rotated in the first direction and when rotated in a second direction opposite to the first direction. A rotor core having at least one pattern in which the temporal variation pattern of changes is formed on the outer peripheral surface is supported by a support base,
The support table compares the at least one pattern of the rotor core with the reference pattern using a gauge on which a reference pattern is displayed, and the first pattern of the rotor core supported on the support table is compared with the reference pattern. determine the direction of
Inserting a shaft into the rotor core in a predetermined direction based on the determined first direction,
assembling a rotor by fixing the shaft to the rotor core;
A method for manufacturing a rotor with.

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