JP5660295B2 - Unbalance correction method for rotating body - Google Patents

Description

  The present invention relates to an unbalance correction processing method for a rotating body that removes the removal portion of the rotating body a plurality of times to remove unbalance of the rotating body.

  The rotating body is provided in a rotating machine and rotates about its axis. A rotating machine that is an object of the present invention is a fluid machine in which rotating blades that exert force on a fluid are provided on a rotating body. This rotating machine includes a prime mover and a driven machine. The prime mover converts the energy of the fluid into rotational kinetic energy by rotationally driving the rotating body by the pressure that the fluid acts on the rotor blades. As a prime mover, for example, there is a gas turbine (axial turbine, radial turbine). The driven machine applies rotational kinetic energy to the fluid by rotating the rotor blades that are rotationally driven to apply pressure to the fluid. Examples of the driven machine include a compressor (an axial flow compressor, a mixed flow compressor, a cross flow compressor, and a pump provided in a centrifugal compressor, an aircraft engine, or the like). Moreover, the rotary machine which is the object of the present invention includes a supercharger having both functions of a prime mover and a driven machine.

  For example, Patent Document 1 is already known as a method for measuring the unbalance of a rotating body and processing the removal unit in correcting the balance of the rotating body of the rotating machine.

Patent Document 1 uses the removal target portion to fix the rotating body to the rotating shaft, and even when the amount of unbalance correction and the correction direction are calculated assuming that the removal target portion is circular, The correct amount of correction can be processed without being affected, and the unbalance direction does not change due to the correction, thereby eliminating the need for re-correction and re-measurement and greatly improving the workability and yield of the correction process. An object of the present invention is to provide an apparatus and method for correcting the rotational balance of a rotating body.
For this purpose, the vertex position of the removal target portion is detected by the vertex detector, and the correction amount and the correction direction of the unbalance obtained in advance assuming that the removal target portion is circular by the correction control device are corrected with the axis. The correction correction amount and the correction correction direction are corrected in accordance with the relative angle between the azimuth angle connecting the apexes of the removal target portion closest to the direction and the correction direction, respectively.

JP 2009-19948 A

Here, an unbalance amount (here, M) obtained by measurement in the removal target part 31 attached to the rotating body 32 as shown in FIG. When machining is performed along the balance direction D1, the amount that can be machined at one place is the maximum amount (here, M _max) capable of machining the removal portion 34a with a cutting tool such as an end mill as shown in FIG. And so on).
In this case, in order to process the amount of unbalance more than M _max, by performing processing at a plurality of points, it is performed balance correction for unbalance amount M of greater than M _max.

In the case of FIG. 1C, two portions at the intersections of the half lines D2 and D3 with the unbalance orientation D1 tilted by 0 degrees or more and less than 90 degrees on both sides and the outer periphery of the removal target part 31 are respectively removed by the removal part 34b, 34c is processed.
In this case, when the inclinations of the half lines D2 and D3 with respect to the half line D1 are 30 degrees and the removal units 34b and 34c are set so as to overlap the apexes of the adjacent removal target parts 31, the unbalance amount that can be processed Is √3M _max from the following formula and takes the maximum value.
It should be noted that vector components to the unbalance direction D1 in the unbalance amount that can be processed by the removal unit 34b and the removal unit 34c are M _max1 and M _max2 , respectively.

M _max1 = M _max cos 30 °

M _max2 = M _max cos 30 °

M = M _max cos 30 ° + M _max cos 30 ° = √3 M _max

In the case of FIG. 1 (D), three locations at the intersections of the unbalance azimuth D1 and the half straight lines D4 and D5 with the unbalance azimuth D1 tilted by 0 degrees or more and less than 90 degrees on both sides and the outer periphery of the removal target portion 31 are shown. The removal parts 34d, 34e, and 34f are respectively processed.
In this case, when the inclinations of the half lines D4 and D5 with respect to the half line D1 are 60 degrees and the removal units 34d, 34e, and 34f are set so as to overlap with the vertices in the adjacent removal target unit 31, the machining can be performed. The balance amount is 2M _max from the following formula and takes the maximum value.
The vector components to the unbalance direction D1 in the unbalance amount that can be processed by the removal unit 34d, the removal unit 34e, and the removal unit 34f are M _max4 , M _max5 , and M _max6 , respectively.

M _max4 = M _max

M _max5 = M _max cos 60 °

M _max6 = M _max cos 60 °

M = M _max + M _max cos 60 ° + M _max cos 60 ° = 2M _max

However, even in the case of FIG. 3 (D), if the unbalance amount exceeds 2M _max , it is impossible to process to eliminate the unbalance, so that it is conventionally discarded as a defective product. There was a problem that it had to be.

  Therefore, an object of the present invention is to make it possible to eliminate unbalance even when the unbalance amount exceeds twice the maximum amount that can be processed at one place.

According to the present invention, the removal target part mounted on the rotary body, a unbalance correction processing method of the rotating body to remove unbalance by removing processing two or more times by the processing unit,
(A) At the time of the first machining, a virtual half line extending from the rotation axis of the rotating body toward the unbalance measurement direction is defined as a first half line, and the first half line is set to 0 degrees or more and less than 90 degrees on both sides When the inclined half line is the second half line and the third half line, respectively, the processing is performed at one of the two intersections where the second half line and the third half line intersect the outer periphery of the removal target portion. perform removal processing by parts, from there to the other intersections, it has rows removal processing in an arc while maintaining the distance between the rotary shaft and the center of the processing unit to be constant,
(B) If there is a residual unbalance even by the removal processing, measure the measurement direction of the residual unbalance,
(C) During the second and subsequent machining,
(C1) An intersection point where the first half line and the outer periphery of the removal target portion intersect when the remaining unbalance orientation is within a range surrounded by the first half line and the second half line And, at the intersection point where the second half line and the outer periphery of the removal target portion intersect,
(C2) The intersection point where the first half line intersects the outer periphery of the removal target portion when the remaining unbalance orientation is within the range surrounded by the first half line and the third half line And, at the intersection where the third half line and the outer periphery of the removal target portion intersect, removal processing is performed,
( C3) When the remaining unbalance azimuth is the same as the azimuth of the first half-line, removal processing is performed at an intersection where the first half-line and the outer periphery of the removal target portion intersect. An unbalance correction method for a rotating body is provided.

  According to the present invention, even when a rotating body having an unbalance that cannot be removed even by three-point machining is generated in the first machining, the balance can be corrected.

It is a top view after the 1st process by a prior art. It is a block diagram of the apparatus for enforcing the unbalance correction processing method of the rotary body in this invention. It is a top view at the time of the 1st process in this invention. It is a top view at the time of the 2nd time and subsequent processing in the present invention. (A) shows a first data table used by the arithmetic unit of FIG. 2, and (B) shows a p (= β) th data table. A two-dimensional plane in which the horizontal axis is the weight moment M and the vertical axis is the orientation φ. It is another two-dimensional plane in which the horizontal axis is the weight moment M and the vertical axis is the orientation φ.

  A preferred embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 2 is a configuration diagram of an apparatus for carrying out the unbalance correction processing method for a rotating body in the present invention.
2A is a configuration diagram of the apparatus, and FIG. 2B is a configuration diagram when the rotating body is viewed from the direction of the rotation axis.
In this figure, 1 is an object to be removed, 2 is a rotating body, 3 is a rotating shaft, 4 is a processing device, 4a is a processing unit, 4b is a drive mechanism, 4c is a position control unit, 10 is a supercharger, and 11 is rotating. An apparatus, 12 is an arithmetic unit, 13 is a mount, 13a is an overhang portion, 14 is an angle sensor, and 15 is an acceleration sensor.

  The removal target portion 1 is a range in which the rotating body 2 may be processed by the processing device 4.

The processing device 4 performs removal processing of the removal target portion 1 at one end portion of the rotating body 2 according to an actual processing depth A, an actual processing direction θ, and a radial position R, which will be described later, output from the arithmetic device 12 of the present invention. In the present embodiment, the processing device 4 has a processing part 4a (a cutting tool such as an end mill) for removing (cutting) the removal target part 1 of the rotating body 2 and the processing part 4a in three dimensions (for example, FIG. 2). Drive mechanism 4b that moves in the X axis direction, the Y axis direction, and the Z axis direction orthogonal to each other, and a position control unit 4c that controls the position of the processing unit 4a by controlling the operation of the drive mechanism 4b. . The position control unit 4c is configured so that the processing unit 4a (for example, the end mill 4a that is rotationally driven) is positioned at the actual processing direction θ and the radial position R, and the actual processing depth A from the reference axial direction position. The drive mechanism 4b is controlled so as to move only in the axial direction (a direction parallel to the rotation axis 3 of the rotator 2; the same applies hereinafter). The reference axial direction position is a position at which the processed portion 4a contacts the axial end surface of the removal target portion 1 in the axial direction when the removal target portion 1 has not been removed once. For example, when the first azimuth is removed, the position control unit 4c is set to the actual machining depth A from the reference axial direction position in a state where the machining unit 4a is positioned at the first azimuth and the radial position R. The drive mechanism 4b is controlled to move in the axial direction. In this case, when this removal processing is the second or subsequent removal processing in the first orientation, the processing unit 4a substantially removes the removal target portion 1 until the first processing depth is reached. Since the machining is not performed, the depth of the substantial removal machining is a depth obtained by subtracting the first machining depth from the actual machining depth A.
Further, the machining device 4 operates the machining unit 4a with the drive mechanism 4b to remove a part, and then keeps the distance between the rotary shaft 3 and the machining unit 4a constant and keeps the rotary shaft 3 at the center. It is also possible to remove while drawing an arc.
In the removal target portion 1, the distance from the rotation center to the radially outer end differs depending on the direction. In FIG. 3, the removal target portion 1 is a hexagon nut whose shape viewed from the direction of the rotation shaft 3 is a hexagon (preferably a regular hexagon).

  In this example, a rotation mechanism (not shown) may be provided. The rotating mechanism (not shown) grips the other end of the rotating body 2 and rotates the rotating body 2, thereby adjusting the rotational direction position of the rotating body 2. The rotation mechanism 14 includes, for example, a gripping mechanism (for example, a collet chuck) that grips the other end of the rotating body 2, a rotation driving mechanism that rotates the gripping mechanism around the rotation shaft 3 of the rotating body 2, and a rotation driving mechanism. And a controller that adjusts the position of the rotating body 2 in the rotational direction.

The supercharger 10 is supported by a mount 13, and a turbine blade (not shown) that is rotationally driven by the exhaust gas of the engine, and a compressor blade that supplies compressed air to the engine by rotating integrally with the turbine blade ( A turbine housing (not shown), a rotating body 2 having a turbine blade coupled to one end and a compressor blade coupled to the other end, and a flow path (scroll) for flowing a fluid for rotationally driving the turbine blade. (Not shown) and a compressor housing (not shown) for accommodating the compressor blades therein.
In addition, when the supercharger 10 in this example is removed by the processing device 4, it is performed in a state in which a turbine housing (not shown) and a compressor housing (not shown) are not attached.

The rotating device 11 is built in the mount 13, grips one end of the rotating body 2, rotates the rotating body 2, and thereby adjusts the rotational direction position of the rotating body 2.
The rotating device 11 includes, for example, a gripping mechanism (not shown) such as a collet chuck that grips one end of the rotating body 2, a rotation driving mechanism that rotates the gripping mechanism around the rotation shaft 3 of the rotating body 2, and a rotation driving mechanism. And a control unit for adjusting the rotational direction position of the rotating body 2 by controlling the rotation.

  For example, the arithmetic device 12 generates vibration data representing the relationship between the acceleration detected by the acceleration sensor 15 and the rotation angle detected by the angle sensor 14, gives an instruction to the position control unit 4c, and operates the processing unit 4a. To process.

  The mount 13 supports the rotating body 2 by a bearing (not shown), and enables vibration measurement by the acceleration sensor 15.

  The mount 13 is a metal having a predetermined shape, and is preferably a material whose material properties (Young's modulus, specific gravity, etc.) are known in advance. Further, in this example, the mount 13 has a quadrangular prism shape whose cross section is a positive direction or a rectangle. However, according to the present invention, the mount 13 may have another prism shape or a column shape including a cylindrical shape. Other suitable shapes may be used.

The angle sensor 14 detects the rotation angle of the rotating body 2 and outputs the detected rotation angle to the arithmetic device 12. The rotation angle changes from zero degrees to 360 degrees when the rotating body 2 rotates once. That is, the rotation angle indicates an angle at which the rotator 2 is rotated from the rotation phase (start point rotation angle) of the rotator 2 as a predetermined start point.
The angle sensor 14 is, for example, a magnetic sensor or an image sensor, and may function in combination.

The acceleration sensor 15 detects the acceleration (that is, vibration) of the rotating body 2 while the rotating body 2 is rotating, and outputs the detected acceleration to the arithmetic device 12. The acceleration sensor 15 may be a magnetic sensor, for example.
The acceleration sensor 15 is preferably attached to the overhanging portion 13a, and more preferably is located at the same height as the rotating body 2.

In FIG. 3A, when a virtual half line extending in the unbalance direction from the rotation axis 3 of the rotating body 2 is Dc, and a half line inclined Dc by 60 degrees on both sides is Da and Db, Da And the intersection of Db and the outer periphery of the rotary body 2 is defined as point A and point B, respectively.
Further, the azimuth of the half line extending from the rotation axis 3 toward Da is defined as the first azimuth, and the azimuth of the half line extending from the rotation axis 3 toward Db is defined as the second azimuth.

FIG. 3B is a diagram of the removal target unit 1 and the rotating body 2 in a state where the processing is started by the processing unit 4a.
The processing unit 4a is assumed to be an end mill in this example, but may be laser processing using a laser.

FIG. 3C is a diagram of the removal target portion 1 and the rotating body 2 in a state where the removal target portion 1 is being processed by the processing portion 4a.
FIG. 3D is a diagram of the removal target unit 1 and the rotating body 2 in a state where the processing of the removal target unit 1 is completed by the processing unit 4a.
In this example, the processing unit 4a performs processing while moving 120 degrees clockwise around the rotating shaft 3 while maintaining a constant distance from the center of the processing range of the processing unit 4a to the rotating shaft 3 of the rotating body 2. Do.
With this configuration, even when the unbalance amount exceeds twice the maximum amount that can be processed in one direction by the processing unit 4, the balance can be corrected, thereby reducing the occurrence of defective products. it can.

  In this example, the processing is performed at 120 degrees, but the above processing can be performed regardless of the angle as long as the angle is 180 degrees or less.

FIG. 4 is a top view in the second and subsequent processing according to the present invention.
In this figure, 5a-5c are removal parts.
4A is a top view before the second and subsequent processing, FIG. 4B is a top view at the second and subsequent processing, and FIG. 4C is a top view after the second and subsequent processing is completed. .

In FIG. 4A, a virtual half line extending from the rotating shaft 3 of the rotating body 2 toward the unbalance direction remaining after the first machining is defined as Dd, and an intersection of Dc and the outer periphery of the rotating body 2 is defined as a point C. .
When Dd is present in the region surrounded by Da and Dc, as shown in FIG. 4C, the points A and C are processed for the unbalance amount for the remaining unbalance orientation.

  In addition, when Dd is present in the region surrounded by Dc and Db, the unbalance amount for the remaining unbalance orientation is processed at points C and B, and the remaining unbalance orientation is determined as Dc complete. Can be eliminated by further processing at point C.

Here, the unbalance orientation and the unbalance amount that need to be processed can be obtained by the following method.
When removal processing is performed a plurality of times, for each removal processing performed so far, data including the unbalance amount removed by the removal processing and the direction of the unbalance amount is defined as already removed unbalance data, Data obtained by synthesizing the already removed unbalanced data of each removal processing performed so far is referred to as synthesized already removed unbalanced data.
Further, data including the measured value of the unbalance amount remaining in the rotating body 2 after the removal processing so far and the measurement orientation in which the unbalance amount exists is used as measurement residual unbalance data.
The computing device 12 calculates the actual machining depths in the first direction and the second direction for eliminating the unbalance indicated by the measured residual unbalance data, based on the combined already removed unbalance data. Note that the arithmetic unit 12 may also calculate the actual machining direction (actual cutting direction) and the actual machining depth when the removal target portion 1 is removed for the first time.
The arithmetic unit 12 stores a program for performing “calculation of the first actual machining direction and actual machining depth” and “calculation of the second and subsequent actual machining directions and actual machining depth” in the procedure described later. ing. Further, the arithmetic device 12 has a function of executing the program.

  In the present application, the azimuth means a position around the rotation center, and the radial position means a position in the radial direction with respect to the rotation center. Preferably, the radial position at which the processing portion 4a removes the removal target portion 1 is constant regardless of the orientation. Further, when viewed from the direction of the rotation axis 3 of the rotating body 2, the processing unit 4 a rotates with the processing unit 4 a positioned in a radial direction in which only a part of the processing unit 4 a overlaps the outer peripheral portion of the removal target unit 1. However, the present invention is particularly advantageous when the removal processing is performed by moving into the removal target portion 1 in the direction of the rotation axis 3.

  The storage unit 21 stores reference data. The reference data is removed when the removal target portion 1 is temporarily removed according to the temporary machining direction (temporary cutting direction), the temporary machining depth (temporary cutting depth), and the temporary machining direction and the temporary machining depth. One set of the unbalanced amount and the temporary removal unbalanced data composed of the azimuth of the unbalanced amount is associated with each other, and a plurality of sets of temporary machining orientations, temporary machining depths, and temporary removal unbalanced data are included.

  The data specifying unit 23 generates a data difference between the above-described combined already removed unbalanced data and the following combined temporary removed unbalanced data as corrected removed unbalanced data. The combined temporary removal imbalance data is a combination of one temporary removal unbalance data including the temporary machining orientation closest to the first orientation and one temporary removal unbalance data including the temporary machining orientation closest to the second orientation. It is. The data specifying unit 23 is further in the vicinity of the combined temporary removal unbalanced data whose post-correction removal unbalanced data is closest to the measured residual unbalanced data and the combined temporary removed unbalanced data (that is, the combined temporary removed data). Identify one or more combined temporary removal unbalanced data (close to unbalanced data).

  The machining data calculation unit 25 calculates the actual machining depths in the first direction and the second direction using the plurality of identified combined temporary removal imbalance data and reference data.

Preferably, the following calculation is performed. The processed data calculation unit 25 converts a plurality of corrected removal unbalance data generated from the plurality of identified combined temporary removal imbalance data into a plurality of pairs of temporary removal unbalance data respectively constituting the plurality of combined temporary removal unbalance data. A mapping function to be converted into removal unbalance data is generated, and the measurement residual unbalance data is applied to the mapping function, thereby calculating a pair of reference removal unbalance data.
For each calculated reference removal imbalance data, the data specifying unit 23 is in the vicinity of the temporary removal unbalance data closest to the reference removal unbalance data and the temporary removal unbalance data (that is, the temporary removal unbalance data). One or more temporary removal imbalance data (close to the balance data) is extracted from the reference data.
The machining data calculation unit 25, for one reference removal unbalance data corresponding to the first orientation, based on a plurality of temporary machining depths corresponding to the plurality of temporary removal unbalance data extracted, An actual machining depth is calculated, and the second reference removal unbalance data corresponding to the second orientation is determined based on the plurality of temporary machining depths corresponding to the extracted plurality of temporary removal unbalance data. The actual machining depth is calculated.

More preferably, the following calculation is performed. The machining data calculation unit 25 converts a plurality of temporary removal unbalance data extracted with respect to one reference removal unbalance data into a plurality of temporary machining orientations and provisional machining depths corresponding to the temporary removal unbalance data. A temporary machining depth obtained by generating a mapping function and applying one reference removal unbalanced data to the mapping function is set as an actual machining depth in the first direction.
Further, the machining data calculation unit 25 converts the extracted plurality of temporary removal imbalance data into the plurality of temporary machining orientations and temporary machining depths corresponding to the temporary removal unbalance data for the other reference removal unbalance data. A mapping function to be converted is generated, and the provisional machining depth obtained by applying the other reference removal imbalance data to the mapping function is set as the actual machining depth in the second direction.

  Hereinafter, first, the case where the first actual machining direction and the actual machining depth are calculated by the above-described arithmetic device 12 will be described, and then the second and subsequent actual machining directions and the actual machining depth are calculated. Will be described in more detail.

[Calculation of first actual machining direction and actual machining depth]
(About measurement imbalance data)
The measurement imbalance data V _UB is expressed as a complex number by the following equation (1).

V _UB = M _UB (cos φ _UB + isin φ _UB ) (1)

Here, i is an imaginary unit, M _UB is a measurement unbalance amount present in the rotating body 13 at present, and φ _UB is an orientation of the measurement unbalance amount (that is, an orientation in which an unbalance exists). And the orientation of the center of gravity of the unbalanced mass). This azimuth is an angle of 0 to 360 degrees indicating a position around the rotation center.
The dimension of the measurement unbalance amount M _UB is obtained by multiplying the unbalanced mass in the rotating body 13 by the distance between the center of gravity of the mass and the rotation center.

(About reference data)
FIG. 5A is a data table (that is, reference data) representing the processing data and temporary removal imbalance data stored in the storage unit 21. The data table in FIG. 5A is composed of n rows of data. The machining data (temporary machining direction, temporary machining depth, and radial position R) and temporary removal imbalance data are associated with each other as described above. In FIG. 5A, the same data number m is used. The values in the rows are associated with each other.

  In the following description, m means a subscript attached to the temporary machining orientation θ, radial position R, temporary removal unbalance data V, temporary removal unbalance amount M, and temporary removal unbalance amount azimuth φ. The subscript m indicates the data number in FIG. 5A and is an integer between 1 and n (that is, m = 1, 2,..., Α-1, α, α + 1,...). n).

The temporary machining direction θ _m is an angle (a value of 0 to 360 degrees) around the rotation center in the removal target portion 1. The radial position R is a position in the radial direction with respect to the center of rotation in the removal target portion 1, and is constant regardless of the value of the data number m. In FIG. 5A, the provisional machining direction θ ₁ is 0 degree or an angle near 0 degrees, the value of θ _m increases as the value of the data number m increases, and θ _n is 360 degrees or 360 degrees. The angle is close to degrees. Preferably, the value of m is incremented by 1, the value of theta _m increases in size between 0.1 ° and 1 °.

Temporary working depth A ₁ corresponds to the mass to be removed by removing machining the removal target part 1. In FIG. 2, the temporary machining depth A ₁ is removed from the reference axial direction position while rotating while the machining portion 4 a (end mill) is positioned at the radial position R and the temporary machining direction. This is the distance to move in the axial direction (left side in FIG. 2) until the end. In this case, the temporary removal imbalance data V _m (that is, the temporary removal unbalance amount M _m and the direction φ _m thereof) is the temporary machining depth in the same row as the temporary removal unbalance data V _m in FIG. Based on the _height A ₁ , the provisional processing direction θ _m and the radial position R, the size and shape data (for example, CAD data) of the removal target portion 1, the density of the removal target portion 1, and the size and shape of the processing portion 4a. Is calculated in advance. In FIG. 5 (A), the temporary processing depth A ₁ is a constant value irrespective of the data number m.

The temporary removal imbalance data V _m includes a temporary removal imbalance amount (temporary removal weight moment) M _m and a direction φ _{m of the} temporary removal imbalance amount M _m . The temporary removal imbalance amount _Mm is the size of the unbalance amount that is removed when the removal target portion 1 is applied in accordance with the processing data corresponding thereto in FIG. Dimensions of the temporary removal unbalance amount M _m is the mass of the imbalance to be removed in the rotary member 2 is obtained by multiplying the distance between the rotation center and the mass center of gravity. The direction φ _m is the direction of the center of gravity of the unbalanced mass that is removed when the removal target portion 1 is made according to the machining data corresponding to this in FIG. Further, the azimuth φ _m is an angle around the rotation center in the removal target portion 1 (a value of 0 to 360 degrees).

A data table (reference data) similar to that shown in FIG. 5A is provided for each temporary machining depth. A data table similar to that shown in FIG. 5A is stored in the storage unit 21 for each k temporary machining depths. These k temporary machining depths are respectively A ₁ (that is, the temporary machining depth in FIG. 5A), A ₂ , A ₃ ,..., A _k . In the following, p is a subscript of the temporary machining depth A, and the temporary machining depth A is distinguished by p. Each temporary machining depth A _p: data table _(p integer from 1 to k) is the constant provisional processing depth A _p, similarly to FIG. 5 (A), n rows associated with each other The temporary processing depth A _p , the temporary processing direction θ, the radial position R, the temporary removal unbalance amount M, and the direction φ are included. Further, among these k data tables, the provisional machining direction θ _m and the radial position R are the same at the same data number m. In each of these k data tables, the temporary removal imbalance data V _m (that is, the temporary removal imbalance amount M _m and the direction φ _m ) is determined in advance by the same method as described above, and the radial position R is the data number m. Regardless of whether it is constant. Note that the value of k is determined to be sufficiently large so that V _UB can be surrounded by four temporary removal imbalance data, as described later, within the range that measurement unbalance data V _UB can take.

  Hereinafter, in each symbol, the data number in each data table is indicated by the above-mentioned suffix m, and the data table (that is, the temporary machining depth A) is indicated by the above-mentioned suffix p. FIG. 5B shows the p (= β) -th data table among the k data tables. That is, p is a table number, and p = 1, 2,..., Β-1, β, β + 1,.

(About data extraction)
The temporary removal imbalance data V _{m, p} is represented by a complex number by the following equation (2).

V _{m, p} = M _{m, p} (cos φ _{m, p} + isin φ _{m, p} ) (2)

Here, i is an imaginary unit.
Data specifying unit 23 next _{| V} m, p _{-V UB |} smallest _{V m is, p} and, said _{V m,} one Surrounding _p or more _{V m,} and a _p storage unit 21 is extracted from the reference data in 21. V _UB is measurement unbalance data of the above equation (1).

| V _{m, p} -V _UB |

= | M _{m, p} (cos φ _{m, p} + isin φ _{m, p} )
-M _UB (cosφ _UB + isinφ _UB ) |

= | M _{m, p} cosφ _{m, p} −M _UB cosφ _UB
+ I (M _{m, p} sinφ _{m, p} −M _UB sinφ _UB ) |

= {(M _{m, p} cos φ _{m, p} −M _UB cos φ _UB ) ²
+ (M _{m, p} sinφ _{m, p} −M _UB sinφ _UB ) ² } ^1/2

In this example, the data specifying unit 23 _obtains V _{m, p} closest to V _UB and three V _{m, p} around the V _{m, p} from the data in the storage unit 21 by a two-stage process. Identify and extract. Preferably, in the two-dimensional plane of FIG. _6, Kakomeru the position of the _{V UB,} extracted identify _{V UB} as close as possible to the four _{V m,} the _p from data in the storage unit 21.

First Step Processing First, the data specifying unit 23 specifies the data number m and the table number p in which | V _{m, p} −V _UB | is the smallest among the k data tables. Here, assuming that m = α and p = β, and | V _{m, p} −V _UB | is the smallest, the data specifying unit 23 sets the temporary removal imbalance data V of the data number α in the β-th data table. _{α and β} are extracted as being closest to V _UB .
Next, the data specifying unit 23 fixes β and extracts data adjacent to V _{α, β} with respect to _α . That is, the data specifying unit 23 selects, from the β-th data table, the temporary removal unbalance data V _{α−1, β} with the data number α−1 and the temporary removal unbalance data V _{α + 1, β} with the data number α + 1. To extract.
Similarly, the data specifying unit 23 fixes _α and extracts data adjacent to V _{α, β} with respect to β. That is, the data specifying unit 23 extracts the data V _{α, β-1} of the data number α in the _β− 1th data table and the data V _{α, β + 1} of the data number α in the β + 1th data table.
As described above, the data specifying unit 23 extracts the five temporary removal imbalance data V _{α, β} , V _{α-1, β} , V _{α + 1, β} , V _{α, β-1} , V _{α, β + 1} .

Second-stage processing Consider a two-dimensional plane in which the horizontal axis is the unbalance amount M and the vertical axis is the azimuth φ. This two-dimensional plane is shown in FIG. In FIG. 6, the positions of the five quantities V _{α, β} , V _{α-1, β} , V _{α + 1, β} , V _{α, β-1} , V _{α, β + 1,} and V _UB extracted by the first stage processing are shown. Show. In the two-dimensional plane of FIG. 6, four V _{m, p} surrounding V _UB are specified as follows.
First, as shown in FIG. 6, from the position of V _{α, β} extracted as being closest to V _UB by the first-stage process, the other four V _{α-1,-extracted} by the first-stage process _. Four vectors extending to the positions of _β , V _{α, β + 1} , V _{α + 1, β} , V _{α, β-1} are defined as divided vectors D (D ₁ , D ₂ , D ₃ , D ₄ ). Thereafter, four half lines HL (HL ₁ , HL ₂ , HL ₃ , HL ₄ ) that extend with the positions of V _{α and β} as one end and respectively include four divided vectors D are considered. The data specifying unit 23 specifies two adjacent half lines HL sandwiching the region including the position of V _UB from these four half lines HL. In the example of FIG. 6, a region sandwiched between two identified adjacent half lines HL ₃ and HL ₄ is indicated by hatching. When the data specifying unit 23 specifies two adjacent half lines, the data specifying unit 23 is in a region sandwiched between these two half lines, and V _{α, β} and α are different by one and β is one. A new V _{m, p} that is different from the k data tables is extracted. In the example of FIG. 6, this new V _{m, p} is V _{α + 1, β-1} .
Next, the data specifying unit 23 sets V _{α, β} , V _{α, β−1} , V _{α + 1, β} , V _{α + 1, β−} as four V _{m, p} surrounding V _UB on the two-dimensional plane of FIG. ₁ is specified. That is, V _{α, β} and two data V _{m, p} indicated by the divided vectors D included in the two adjacent half lines specified as described above (in the example of FIG. 6, V _{α, β-1} V _{alpha + 1,} and _beta), a new _{V m} extracted as described _above, in the example of _p (Fig. _{6, V α + 1, β} -1) and _{a, V m} showing four positions surrounding the position indicated by _{V UB , P.} The four V _{m, p} surrounding these V _UBs are extracted by the data specifying unit 23 as V _{m, p} closest to V _UB and three V _{m, p} around V _{m, p.} A plurality of temporary removal imbalance data.

(About mapping functions)
Processing data calculating unit 25, the closest _{V m} to _{V UB} data identifying unit 23 has _{extracted, p,} and the _{V m,} one Surrounding _p or more _{V m, p} (the example of FIG. 6 Then, a mapping function for converting V _{α, β} , V _{α, β-1} , V _{α + 1, β} , V _{α + 1, β-1} ) into corresponding processing data is calculated. In this example, the mapping function is the point (M _{m, p} , φ _{m, p} ) on the two-dimensional plane in FIG. 6, the horizontal axis is the temporary machining depth _Ap , and the vertical axis is the temporary machining direction θ _m . It is a linear mapping transferred to a point (A _p , θ _m ) on a certain two-dimensional plane (however, according to the present invention, the mapping function is not limited to a linear mapping and may be other than a linear mapping) . This linear mapping is expressed by the following equations (3) and (4).

A _p = a ₁₁ M _{m, p} + a ₁₂ φ _{m, p} + b ₁ (3)

θ _m = a ₂₁ M _{m, p} + a ₂₂ φ _{m, p} + b ₂ (4)

_{Here, a 11, a 12, a} 21, a 22, b 1, b 2 are constants. Further, in the equations (3) and (4), M _{m, p} , φ _{m, p} are provisional removal imbalance data V _{m, p} closest to V _UB extracted by the data specifying unit 23 as described above, or , One or more temporary removal imbalance data V _{m, p} around the temporary removal imbalance data V _{m, p} , and A _p , θ _m are the plurality of temporary removal imbalance data. It is the temporary processing depth and the temporary processing direction in the associated reference data.
The machining data calculation unit 25 calculates the constants a ₁₁ , a ₁₂ , a ₂₁ , a ₂₂ , b ₁ , b ₂ of the above formulas (3) and (4) as follows. In the example of FIG. 6, when V _{α, β} = (M _{α, β} , φ _{α, β} ) is applied to the above equations (3) and (4), it is converted into (A _β , θ _α ), and V _{α, When β−1} = (M _{α, β−1} , φ _{α, β−1} ) is applied to the above equations (3) and (4), it is converted into (A _β−1 , θ _α ), and V _{α + 1, β} = (M _{α + 1, β} , φ _{α + 1, β} ) is applied to the above equations (3) and (4), it is converted to (A _β , θ _{α + 1} ), and V _{α + 1, β−1} = (M _{α + 1, β− 1} , φ _{α + 1, β-1} ) applied to the above equations (3), (4), a ₁₁ , a ₁₂ , a ₂₁ , a ₂₂ , b ₁ converted to (A _β-1 , θ _{α + 1} ) , B _{2 is obtained} by the least square method. Specifically, a ₁₁ , a ₁₂ , a ₂₁ , a ₂₂ , b ₁ , and b ₂ that minimize the next value S are calculated.

S = {A _β − (a ₁₁ M _{α, β} + a ₁₂ φ _{α, β} + b ₁ )} ²
+ {Θ _α − (a ₂₁ M _{α, β} + a ₂₂ φ _{α, β} + b ₂ )} ²
+ {A _β-1 − (a ₁₁ M _{α, β-1} + a ₁₂ φα _{, β-1} + b ₁ )} ²
+ {Θ _α − (a ₂₁ M _{α, β-1} + a ₂₂ φα _{, β-1} + b ₂ )} ²
+ {A _β − (a ₁₁ M _{α + 1, β} + a ₁₂ φ _{α + 1, β} + b ₁ )} ²
+ {Θ _{α + 1} − (a ₂₁ M _{α + 1, β} + a ₂₂ φα _{+ 1, β} + b ₂ )} ²
+ {A _β-1 − (a ₁₁ M _{α + 1, β-1} + a ₁₂ φα _{+ 1, β-1} + b ₁ )} ²
+ {Θ _{α + 1} − (a ₂₁ M _{α + 1, β−1} + a ₂₂ φα _{+ 1, β−1} + b ₂ )} ²

The machining data calculation unit 25 calculates the actual machining depth A and the actual machining direction θ by applying M _UB and φ _UB to the mapping function thus calculated. Specifically, the actual machining depth A and the machining direction θ are calculated by the following equations (5) and (6).

A = a ₁₁ M _UB + a ₁₂ φ _UB + b ₁ (5)

θ = a ₂₁ M _UB + a ₂₂ φ _UB + b ₂ (6)

[Calculation of actual machining orientation and actual machining depth for the second and subsequent times]
(About each data)
The post-correction removal unbalance data, the combined temporary removal unbalance data, the measurement residual unbalance data, and the combined already removed unbalance data are expressed as follows.

Corrected unbalance _{data: V m, p + V m} ', p' -V R
Synthetic temporary removal imbalance data: V _{m, p} + V _{m ′, p ′}
Measurement residual unbalance data: ν _UB
Synthesis already removed unbalance data: V _R

Each symbol described above is expressed by the following equations (7) to (10).

ν _UB = M _UB (cos φ _UB + isin φ _UB ) (7)

V _{m, p} = M _{m, p} (cos φ _{m, p} + isin φ _{m, p} ) (8)

V _{m ′, p ′} = M _{m ′, p ′} (cos φ _{m ′, p ′} + isin φ _{m ′, p ′} ) (9)

V _R = Σm _j (cos φ _j + isin φ _j ) (10)

ν _UB is composed of the unbalance amount M _UB (measured value) remaining in the rotating body 2 at this time and the direction φ _UB of the unbalance amount M _UB , where φ _{m, p} is closest to the first direction (Closest) is the temporary machining direction, and φ _{m ′, p ′} is the closest (closest) temporary machining direction to the second direction. φ _{m ', p'} are _{= φ m, p + φ c} , by phi _c (e.g. 60 _{degrees), φ m, p <φ} UB <φ m ', p' becomes. That is, the orientation of ν _UB is sandwiched between the orientations of V _{m, p} , V _{m ′, p ′} . The first azimuth and the second azimuth are predetermined azimuths. Note that the difference φ _c between the temporary machining direction φ _{m, p} and the temporary machining direction φ _{m ′, p ′} does not change every time the actual machining direction and the actual machining depth are calculated, and is constant (for example, 60 degrees). The reference data may be created and an algorithm may be assembled, or each time the difference φ _c between the temporary machining direction φ _{m, p} and the temporary machining direction φ _{m ′, p ′} calculates the actual machining direction and the actual machining depth, Reference data may be created and an algorithm may be assembled so that it can change.
For example, the data number m of φ _{m, p is} the data number m of the temporary machining direction θ _m in the reference data closest to the actual machining direction θ that has been subjected to the first removal machining. Here, it is assumed that m = α and m ′ = α ′. Hereinafter, description will be made assuming that m = α and m ′ = α ′.
The subscripts _{m and p of} V _{m, p} , V _{m ′, p ′} are as described above, but “′” added to _{m, p} is V _{m, p} and V _{m ′, p ′} . Is merely for identification.
In formula V _R, sigma is the sum of j. j indicates the number of removal processes. For example, when the removal target portion 1 has been removed only once, V _R = m ₁ (cos φ ₁ + isin φ ₁ ), and the removal target portion 1 has been removed only twice. V _R = m ₁ (cosφ ₁ + isinφ ₁ ) + m ₂ (cosφ ₂ + isinφ ₂ ). Thus, in the formula V _R, j is used for identifying the respective removal processing was made so far from each other, sigma manner, by combining the previously removed imbalance data for each removal process has been made so far, the combined data is V _R.

Synthesis already removed unbalance data V _R may be calculated from past processed data. For example, in the case where the removal target portion 1 has only been removed once, the actual machining depth A and the actual machining direction for the first time are the actual machining depth A calculated by the above formulas (5) and (6). In the case of the actual machining direction θ (assumed to be the first direction), two temporary machining depths A _p and A _{p + 1} (near the actual machining depth A) with the actual machining depth A interposed therebetween. in this example, _{a p} is increased by increasing by p. in other _{words, a p ≦ a ≦ a p} + 1) and two temporary removal unbalance data V _alpha each having the same table _{number, p,} V _α, a _{p + 1} The two temporary removal imbalance data V _{α, p} , V _{α, p + 1} whose data number m = α is closest to the first orientation is extracted from the reference data. V _{α, p} , V _{α, p + 1} are expressed by the following equations (11) and (12).

V _{α, p} = M _{α, p} (cos φ _{α, p} + isin φ _{α, p} ) (11)

V _{α, p + 1} = M _{α, p + 1} (cos φ _{α, p + 1} + isin φ _{α, p + 1} ) (12)

In this case, the _{V R} expressed by the following equation (13), linear interpolation equation as follows (14) is calculated by (15).

V _R = m ₁ (cos φ ₁ + isin φ ₁ ) (13)

m ₁ = (M _{α, p + 1} −M _{α, p} ) × (A−A _{α, p} ) ÷ (A _{α, p + 1} −A _{α, p} ) + M _{α, p}
(14)

φ ₁ = (φ _{α, p + 1} −φ _{α, p} ) × (A−A _{α, p} ) ÷ (A _{α, p + 1} −A _{α, p} ) + φ _{α, p}
... (15)

Even if you have already removed processed more than once, _{m 2,} phi _{2, m 3} constituting the _{V R,} phi ₃ also above equation (14), is calculated in the same linear interpolation equation (15) Good. However, the substantially removed depth is applied to the linear interpolation formula as the actual machining depth of the second or subsequent round. That is, when the removal process of the second or subsequent round is a removal process of the actual machining direction that has already been removed, the depth already removed at the time of the removal is determined by A value obtained by subtracting the actual machining depth from the reference axial direction position is applied to the linear interpolation formula.

(About data extraction)
Data specifying unit 23 Corrected unbalance data _{V α, p + V α '} , p' -V R residual unbalance data [nu _UB comes closest pair of temporary removal unbalance data V in _{alpha measurement,} p, V _{α ′, p ′} and one pair or two or more pairs of temporary removal unbalance data V _{α, P} that are data around the pair of temporary removal imbalance data V _{α, p} , V _{α ′, p ′ . p} , V _{α ′, and p ′} are extracted from the reference data.
That is, the data specifying unit 23 extracts a plurality of pairs of temporary removal imbalance data V _{α, p} , V _{α ′, p ′} that minimize W in the following equation (16) from the reference data.

W = | ν _UB − (V _{α, p} + V _{α ′,} p′−V _R ) | (16)

Here, with respect to the above equation (16), V _{α, p} + V _{α ′,} p′−V _R = ν _{(p, p ′)} .
Minimizing W in the above equation (16) is the same as the post-correction removal unbalance data ν _{(p, p ′)} being closest to ν _UB .
In this example, the data specifying unit 23 has ν _{(p, p ′)} closest to the position indicated by ν _UB on the two-dimensional plane of FIG. 7 and one or more around ν _{(p, p ′)} or two or more ν _{(p, p ')} as, [nu _UB can the Kakomeru, and [nu four [nu _{(p, p} as close as possible to the _UB') in order to identify these four [nu _{(p, p} P and p ′ specifying _“)” are extracted from the reference data. For example, the data specifying unit 23 sets ν _{(t, u)} , ν _{(t + 1, u)} , ν _{(t, u + 1)} , ν _{(t + 1, u + 1 )} as these four ν _{(p, p ′)} surrounding ν _{UB. )} Is specified and extracted. Note that ν _{(t, u)} is data generated by a combination that is closest to ν _UB among all combinations of p and p ′ that can be extracted from the reference data.
Note that FIG. 7 shows a two-dimensional plane in which the unit of the horizontal axis coordinate is weight moment (mass × radius) and the unit of the vertical axis coordinate is the direction φ.

(About actual machining direction and actual machining depth)
Each of four ν _{(p, p ′)} is a pair of temporary removal unbalance data V _{α, p} , V _{α ′, p ′} (that is, temporary removal unbalance moments M _{α, p} , M _{α ′ )} in the reference data. _{, P ′} and the azimuth φ _{α, p} , φ _{α ′, p ′} ) of the temporary removal imbalance moment are generated as in the following equations (17) to (20).

M _{α, p} = a ₁₁ ν _x + a ₁₂ ν _y + b ₁ (17)

φ _{α, p} = a ₂₁ ν _x + a ₂₂ ν _y + b ₂ (18)

M _{α ′, p ′} = a ₃₁ ν _x + a ₃₂ ν _y + b ₃ (19)

φ _{α ′, p ′} = a ₄₁ ν _x + a ₄₂ ν _y + b ₄ (20)

Here, ν _x and ν _y are the horizontal coordinate and the vertical coordinate of each of the four ν _{(p, p ′)} identified and extracted by the data identifying unit 23.
The constants a ₁₁ , a ₂₁ , a ₃₁ , a ₄₁ , a ₁₂ , a ₂₂ , a ₃₂ , a ₄₂ , b ₁ , b ₂ , b ₃ , b ₄ in the above formulas (17) to (20) are as follows: To calculate. In the example of FIG. 7, when ν _{t, u} is applied to the above equations (17) to (20), it is converted into a pair of temporary removal imbalance data V _{α, t} , V _{α ′, u} , and ν _{t + 1, u} Is applied to the above equations (17) to (20), it is converted into a pair of temporary removal imbalance data V _{α, t + 1} , V _{α ′, u} , and ν _{t, u + 1} is converted to the above equations (17) to (20). Is applied to a pair of temporary removal unbalance data V _{α, t} , V _{α ′, u + 1} , and ν _{t + 1, u + 1} is applied to the above equations (17) to (20), a pair of temporary removal unbalance data A ₁₁ , a ₂₁ , a ₃₁ , a ₄₁ , a ₁₂ , a ₂₂ , a ₃₂ , a ₄₂ , b ₁ , b ₂ , b ₃ , b converted to balance data V _{α, t + 1} , V _{α ′, u + 1 4 is obtained} by the method of least squares in the same manner as in the above formulas (3) and (4).

The processed data calculation unit 25 applies ν _UB = M _UB (cos φ _UB + isin φ _UB ) to the mapping function calculated in this way, so that a pair of reference removal imbalance data (that is, a pair of unbalance amounts M). , M ′ and its orientations φ, φ ′). Specifically, a pair of unbalance amounts M and M ′ and their orientations φ and φ ′ are calculated by the following equations (21) to (24).

M = a ₁₁ M _UB + a ₁₂ φ _UB + b ₁ (21)

φ = a ₂₁ M _UB + a ₂₂ φ _UB + b ₂ (22)

M ′ = a ₃₁ M _UB + a ₃₂ φ _UB + b ₃ (23)

φ ′ = a ₄₁ M _UB + a ₄₂ φ _UB + b ₄ (24)

Here, M _UB and φ _UB are the horizontal and vertical axis coordinates of ν _UB in FIG.

M and φ and M ′ and φ ′ are two-direction machining data to be removed next time as follows.
The data specifying unit _assumes that M calculated by the above formula (21) is M _UB of the above formula (1), and φ calculated by the above formula (22) is φ _UB of the above formula (1). 23 produces a measured unbalance data _V UB ₌ M UB of the above equation _{(1) (cosφ UB + isinφ} UB). Next, the arithmetic unit 12 _assumes that the V _UB generated in this way is the measurement unbalance data of the above equation (1), and uses the same method as [Calculation of actual machining direction and actual machining depth for the first time] extracting nearest temporary removal unbalance data V _m in _{UB, p,} and the temporary removal unbalance data V _m, one surrounding _p or more temporary removal unbalance data V _m, the _p from reference data Then, similarly to the above formulas (3) and (4), a mapping function for converting the plurality of temporary removal unbalanced data into the corresponding processed data is calculated, and V _UB = M _UB ( cosφ _UB + isinφ _UB ) to calculate the actual machining depth A and the actual machining direction θ. Here, only the actual machining depth A out of the actual machining depth A and the actual machining orientation θ is used. That is, the actual machining depth A is set as the actual machining depth in the first orientation.
Similarly, M ′ calculated by the above equation (23) is M _UB of the above equation (1), and φ ′ calculated by the above equation (24) is φ _UB of the above equation (1). as a data specifying unit 23 generates a measured unbalance data _V UB ₌ M UB of the above equation _{(1) (cosφ UB + isinφ} UB). Next, the arithmetic unit 12 _assumes that the V _UB generated in this way is the measurement unbalance data of the above equation (1), and uses the same method as [Calculation of actual machining direction and actual machining depth for the first time] extracting nearest temporary removal unbalance data V _m in _{UB, p,} and the temporary removal unbalance data V _m, one surrounding _p or more temporary removal unbalance data V _m, the _p from reference data Then, similarly to the above formulas (3) and (4), a mapping function for converting the plurality of temporary removal unbalanced data into the corresponding processed data is calculated, and V _UB = M _UB ( cosφ _UB + isinφ _UB ) to calculate the actual machining depth A and the actual machining direction θ. Here, only the actual machining depth A out of the actual machining depth A and the actual machining orientation θ is used. That is, the actual machining depth A is set as the actual machining depth in the second orientation.

(Effect of this embodiment)
In the balance correction processing data calculation device 12 according to the above-described embodiment of the present invention, in the second and subsequent removal processing, the first unbalance measurement direction remaining in the rotating body 2 after the previous removal processing is sandwiched in between. The direction and second direction are the next machining direction, and the data obtained by combining the previously removed unbalanced data of each removal process that has been performed so far is the synthesized already removed unbalanced data, and measured based on the combined already removed unbalanced data. The actual machining depths of the first direction and the second direction for eliminating the unbalance indicated by the remaining unbalance data are calculated. In this way, by using the composite already removed unbalanced data reflecting each removal processing performed so far, even in the second and subsequent removal processing, the actual processing depth to be removed next can be highly accurate. It can be calculated.

Composite data of one temporary removal unbalance data including the temporary machining direction closest to the first direction and one temporary removal unbalance data including the temporary processing direction closest to the second direction is defined as the combined temporary removal unbalance data. The data specifying unit 23 generates the data difference between the combined temporary removal unbalanced data and the combined already removed unbalanced data as the corrected removed unbalanced data. This is data obtained by removing the influence of the already removed unbalanced data of the removal processing from the reference data with high accuracy. In a preferred example, [nu position of _UB can quote, and the [nu _UB into four as close as possible Corrected unbalance data ν _{(p, p ')} corresponding to the these ν _{(p, p')} provisionally Based on the removal unbalance data, a local approximate expression in the vicinity of ν _UB (for example, the above equations (17) to (20)) is used, so that the reference removal unbalance between the first direction and the second direction is obtained. The data is acquired, and further, temporary removal unbalance data V _{m, p} closest to each reference removal unbalance data, and one or more temporary removals around the temporary removal unbalance data V _{m, p} By extracting the unbalance data V _{m, p} and using a local approximate expression (for example, the above expressions (3) and (4)) in the vicinity of each reference removal unbalance data V _UB , Of actual machining depth in the second direction Calculation accuracy can be improved.

  The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Removal object part, 2 Rotating body, 3 Rotating shaft, 4 Processing apparatus, 4a Processing part
4b drive mechanism, 4c position control unit, 5a to 5c removal unit, 10 supercharger,
11 rotating device, 12 computing device, 13 mount, 13a overhang part,
14 angle sensors, 15 acceleration sensors, 21 storage units,
23 data specifying part, 25 processing data calculating part, 31 removal object part,
32 rotating body, 33 rotating shaft, 34a-34f removal part

Claims (1)

For removal target portion attached to the rotating body, a unbalance correction processing method of the rotating body to remove unbalance by removing processing two or more times by the processing unit,
(A) At the time of the first machining, a virtual half line extending from the rotation axis of the rotating body toward the unbalance measurement direction is defined as a first half line, and the first half line is set to 0 degrees or more and less than 90 degrees on both sides. When the inclined half line is the second half line and the third half line, respectively, the processing is performed at one of the two intersections where the second half line and the third half line intersect the outer periphery of the removal target portion. perform removal processing by parts, from there to the other intersections, it has rows removal processing in an arc while maintaining the distance between the rotary shaft and the center of the processing unit to be constant,
(B) If there is a residual unbalance even by the removal processing, measure the measurement direction of the residual unbalance,
(C) During the second and subsequent machining,
(C1) An intersection point where the first half line and the outer periphery of the removal target portion intersect when the remaining unbalance orientation is within a range surrounded by the first half line and the second half line And, at the intersection point where the second half line and the outer periphery of the removal target portion intersect,
(C2) The intersection point where the first half line intersects the outer periphery of the removal target portion when the remaining unbalance orientation is within the range surrounded by the first half line and the third half line And, at the intersection where the third half line and the outer periphery of the removal target portion intersect, removal processing is performed,
( C3) When the remaining unbalance azimuth is the same as the azimuth of the first half-line, removal processing is performed at an intersection where the first half-line and the outer periphery of the removal target portion intersect. unbalance correction processing method of the rotating body.