JP2002315277A - Method of manufacturing, and device for manufacturing rotor for rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the yield of rotors for a rotating electric machine by enabling the formation of a yoke into roughly a cup shape. SOLUTION: In a method of manufacturing rotors 10 for a rotating electric machine in which a yoke of roughly a cup shape that has one or more cooling holes in its bottom part and surrounding part is formed of a metal disc 16 having the cooling holes, a clamper 48 which has a flat surface part provided with a protrusion for pressing the outside circumference part of the bottom part of the yoke, and a forming die 46 which has protruding parts corresponding to the shape of the cooling holes for embedding the cooling holes 102, are used. The metal disc 16 is gripped with the clamper 48 and the forming die 46. Then, the metal disc 16 is subjected to spinning work and the surrounding part 14b of the yoke 14 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a rotor for a rotating electric machine used for an outer rotor type generator, a motor and the like.

[0002]

2. Description of the Related Art Conventionally, a method of manufacturing a yoke by spinning has been disclosed in Japanese Patent Application Laid-Open No. Hei 10-23709. This prior art has a bottom portion having an opening formed to support a starting output shaft of a planetary reduction starter incorporating a planetary gear reduction device, and an inner peripheral gear portion formed near the bottom portion. A method of manufacturing a cylindrical yoke functioning as a magnetic field of a motor in a planetary reduction starter, wherein the yoke is formed by cold spinning a disk made of a metal material, The peripheral wall portion, which is a thin portion, can be easily formed.

[0003]

By the way, a small and high-power outer rotor type generator or motor generates a lot of heat, and a cooling hole is provided at the bottom of the yoke of the rotor to cool it. ing.

However, using the above-mentioned conventional technology,
When spinning a metal disk having a cooling hole formed therein, the metal disk is pulled by a roller, so that the cooling hole may be deformed. The dimensional accuracy of the roundness and the coaxiality (concentricity) may be reduced.

In a generator or a motor, when the roundness of the yoke is not ensured, a predetermined torque cannot be output because the gap between the magnet provided in the yoke and the stator is not a predetermined size. Occurs. Also,
If the coaxiality (concentricity) of the yoke is not secured,
Since the air gap differs depending on the phase in the rotation direction, there is a problem that torque fluctuation increases.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem. In an outer rotor type generator or motor having a cooling hole in a yoke, the yoke is substantially deformed without deforming the cooling hole. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus of a rotating electrical machine rotor that can be formed into a cup shape and that can improve the yield of the rotating electrical machine rotor.

[0007]

A method of manufacturing a rotor for a rotating electrical machine according to the present invention includes the step of forming a substantially cup-shaped yoke having a bottom portion and a peripheral portion by forming a metal disk. In the method for manufacturing a rotor, the yoke has one or more cooling holes at a bottom portion, and the metal disk has one or more holes that later become one or more cooling holes in the yoke. Wherein the step is a clamping step of clamping the metal disc with a clamper and a molding die,
A spinning step of forming a peripheral portion of the yoke by performing a spinning process on the metal disk, and having a shape corresponding to a shape of a hole of the metal disk as the molding die;
And, in the clamping step, using a molding die having a projection inserted into the hole of the metal disk, as the clamper, the outer peripheral side of a portion of the metal disk, which will be the bottom of the yoke later. It is characterized in that a clamper having a pressing portion constituted by at least one turn of a ring-shaped protrusion for pressing is used.

[0008] When a yoke is formed by spinning a metal disk having a hole to be a cooling hole later, a pressing portion provided on a clamper is used to form the metal disk. Of these, since the outer peripheral side of the portion that will be the bottom of the yoke later is fixed, the cooling hole is not deformed by the subsequent spinning. Here, the outer peripheral side is inside the peripheral edge of the portion that will later become the bottom of the yoke of the metal disk, and outside the outermost position of the hole that later becomes the cooling hole. Means

[0009] The pressing portion may be a ring-shaped projection. Although a single-turn protrusion may be used, it is preferable to use a plurality of turns of the protrusion. This makes it possible to firmly fix the outer peripheral side of the portion that will later become the bottom of the yoke of the metal disk, and that the hole portion that will later become the cooling hole portion will be deformed even by the subsequent spinning process. There is no.

Further, when the metal disk is sandwiched between the clamper and the mold, a projection is inserted into the cooling hole of the metal disk. As a result, deformation of the inner peripheral edge of the hole of the metal disk during spinning is stopped by the protrusion of the molding die, and deformation of the cooling hole can be prevented.

In the manufacturing method, the yoke has a boss fixed to a rotating shaft of a motor fixed to a bottom thereof, and the yoke has one or more cooling holes. As the molding die, a molding die having a concave portion into which the boss is inserted is used, and in the step, the axis of the metal disk and the axis of the boss are aligned, and the metal disk and the A boss portion fixing step of fixing the boss portion to the boss portion using a stopper may be included.

In this case, since the boss is attached to the metal disk before the spinning, a post-process for attaching the boss after the spinning is not only unnecessary.
It is possible to prevent a decrease in dimensional accuracy due to a post-process.
Further, by using a mold having a concave portion into which the boss is inserted, the mold can be joined to the metal disk having the boss from the side of the boss, and the rotor is separated from the boss and the yoke. In the case of manufacturing, it is possible to easily manufacture a rotor for a rotating electrical machine having roundness and coaxiality with secured dimensional accuracy without performing a cutting process to secure dimensional accuracy in a later process. Become. Further, by fixing the metal disk and the boss using a stopper, the boss can be easily fixed to the metal disk, which leads to simplification of the process.

[0013] In the manufacturing method, the molding die may include a molding portion for forming a magnet attachment portion on an inner peripheral portion of the yoke, and the molding portion faces the metal disk. A step formed in a peripheral direction of a peripheral portion of the portion, and a groove formed in an outer peripheral surface of the forming die in parallel with an axial direction, and in the spinning step using the forming die, In addition to forming the peripheral portion, a magnet attachment portion may be formed on the inner peripheral portion of the yoke.

This makes it possible to cause a step in the molded yoke and to dispose a magnet at the step. Furthermore, by the groove formed parallel to the axial direction,
Since the magnet mounting portion for fixing the magnet is formed, a step of positioning the magnet in a subsequent step is not required.

Next, an apparatus for manufacturing a rotor for a rotating electrical machine according to the present invention includes the step of forming a substantially cup-shaped yoke having a bottom and a peripheral portion by molding a metal disk. In the apparatus, the yoke has one or more cooling holes in a bottom portion, and the metal disk has one or more holes that will later become one or more cooling holes in the yoke. A clamping means for clamping the metal disk with a clamper and a forming die; and a spinning means for performing a spinning process on the metal disk to form a peripheral portion of the yoke. At least one for pressing the outer peripheral side of the bottom portion
It has a pressing part composed of a ring-shaped projection of the turn,
The molding die has a shape corresponding to the shape of the hole of the metal disk, and has a projection inserted into the hole of the metal disk in a clamping operation by the clamping means. I do.

According to the above configuration, when the metal disk having the cooling hole is formed by spinning, the pressing portion provided on the clamper later becomes the bottom of the yoke in the metal disk. Since the outer peripheral side of the portion is fixed, the cooling hole is not deformed even by the subsequent spinning.

In the above manufacturing apparatus, the yoke has a boss fixed to a rotating shaft of a motor fixed to a bottom portion thereof, and the yoke has one or more cooling holes. The mold may have a concave portion into which the boss is inserted.

[0018] The molding die has a molding portion for forming a magnet attachment portion on an inner peripheral portion of the yoke.
The molding portion has a step formed in a peripheral direction at a peripheral portion of a portion opposed to the metal disk, and a groove formed on an outer peripheral surface of the molding die and parallel to an axial direction of the molding die. May be provided.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method and an apparatus for manufacturing a rotor for a rotating electrical machine according to the present invention (hereinafter, referred to as an embodiment).
The manufacturing method and the manufacturing apparatus according to the embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view of a rotor 10 manufactured by the manufacturing method according to the present embodiment. This rotor 1
Numeral 0 includes a boss 12 fixed to a rotating shaft (not shown) of the motor and a yoke 14 having a substantially cup shape. The yoke 14 is, as described later, a metal disk 16
(See FIG. 3).

The boss 12 is fixed to the center of the bottom 14a of the yoke 14. More specifically, the axis of the boss 12 is aligned with the axis of the yoke 14, and the boss 12 is fixed to the bottom 14a of the yoke 14. The boss 12 is fixed.

A plurality (four in the illustrated example) of cooling holes 102 are provided around the bottom 14a of the yoke 14, and a plurality of cooling holes 102 are provided on the inner wall of the peripheral portion 14b of the yoke 14. A magnet mounting part 103 is provided.

Each magnet mounting portion 103 has one concave portion 104 sandwiched between two adjacent belt-shaped protrusions 105,
The recess 104 is provided at an end in the depth direction and has a pedestal 106 for determining the insertion length of the magnet. The pedestal 106 is connected to the bottom portion 14 a of the yoke 14 and the peripheral portion 14.
It is formed by a step 118 formed at the boundary with b.

On the other hand, the boss portion 12 is a member for fixing the yoke 14 to the rotation drive shaft of the motor. As shown in FIG. 4, the disk portion 22 is connected to one end of the cylindrical portion 20. The cylindrical portion 20 is formed with a hole 24 for inserting a rotary drive shaft in the axial direction.

The disk portion 22 has a projection 28 for insertion into a center hole 26 (see FIG. 3) at the center of the metal disk 16.
And a hole 32 corresponding to the hole 30 for the stopper of the metal disk 16 (see FIG. 3). The hole 32 is provided for fixing the boss 12 to the metal disk 16 with a stopper 34.

The rotor 10 is basically constructed as described above. Here, a method of manufacturing the rotor 10 will be described. First, as shown in FIG. A metal disk 16 having a plurality of holes 122 serving as 102 is used. Then, as shown in FIG. 4, the boss portion 12 is fixed to the central portion of the bottom of the metal disk 16.

Next, as shown in FIG. 5, for a combined body (hereinafter, referred to as a work 18) in which the metal disk 16 and the boss portion 12 are fixed, a spinning apparatus as a manufacturing apparatus according to the present embodiment is used. By performing the spinning process using the processing device 40, the rotor 10 as shown in FIG. 1 is manufactured.

The spinning apparatus 40 includes a spindle 42 for rotating the workpiece 18 to be machined, a lathe 44 as a headstock, a forming die 46 for molding the workpiece 18 into a predetermined shape, and a spindle 46. A clamper 48 coaxially rotating with the main shaft 42 and a workpiece 18
6 is provided with a roller 49 for pressing.

Then, the work 18 is clamped between the clamper 48 of the spinning device 40 and the molding die 46 (clamping process), and then the roller 49 is moved in the direction of the molding die 46 to perform the spinning process (the spinning process). ), The rotor 10 is manufactured.

In this case, as the clamper 48, FIG.
As shown in FIG. 8B, a clamper 48 provided with a pressing portion 107 for pressing the outer peripheral side of a portion to be the bottom 14a of the yoke 14 later in the metal disk 16 is used. As shown in FIG.
A molding die 46 having a shape corresponding to the shape of the hole 122 of No. 6 and having the projection 110 inserted into the hole 122 of the metal disk 16 in the clamping step is used.

More specifically, the molding die 46 is provided as shown in FIG.
As shown in FIG. 5, a concave portion 50 into which the boss portion 12 is inserted is provided at a central portion of a surface 46a facing the metal disk 16 in the mold member of the workpiece 18, and a peripheral portion of the surface 46a is provided. A projection 110 is provided which has a shape corresponding to the hole 122 of the metal disk 16 and is inserted into the hole 122 of the metal disk 16 in the clamping step.

Further, as shown in, for example, FIG. 6 or FIG. 7, the molding die 46 is used to form the molding portion 11 for forming the magnet mounting portion 103 on the inner wall of the peripheral portion 14b of the yoke 14.
6. The molding portion 116 includes a step 114 formed in a circumferential direction on a peripheral portion 134 of a portion facing the metal disk 16 and a groove 113 formed in the outer peripheral surface of the molding die 46 in parallel with the axial direction. Have.

In other words, the molding die 46 has a shape in which the two cylindrical members 130 and 132 having different outer diameters are aligned with each other so that the axes thereof are coincident with each other, and of the two cylindrical members 130 and 132, The large-diameter cylindrical portion (first cylindrical portion 130) has a band-shaped projection 112 parallel to the axial direction on the outer periphery thereof, and the end surface 46a of the small-diameter cylindrical portion (second cylindrical portion 132). Is provided with a recess 50 into which the boss 12 is inserted.

On the other hand, the clamper 48 is shown in FIGS.
As shown in FIG. 2B, a concave portion 120 for holding the pressing portion 107, the stopper 34, and the clamper 48 in contact with the metal disk 16 is provided on a surface of the member for holding the work 18 together with the molding die 46. Have been.

Here, the outer peripheral side is, as shown in FIG.
Of the metal disk 16, it is located inside the peripheral edge 134 of the portion that will later become the bottom 14 a of the yoke 14, and outside the outermost position of the hole 122 that will later become the cooling hole 102. Means position.

That is, when the clamper 48 clamps the metal disk 16 together with the molding die 46, the pressing portion 107 is located at the bottom 14 a of the yoke 14 behind the metal disk 16.
Hole 122 to be the cooling hole 102
It is provided at a position where the outer part is sandwiched.

As the pressing portion 107, for example, FIG.
As shown in FIG. 8B and FIG.
08a and 108b. One turn protrusion 10
8a or 108b, but preferably a plurality of (two in the example of FIGS. 8A and 8B) turn projections 10.
It is desirable to be composed of 8a and 108b. As a result, the bottom portion 14a of the yoke 14
Can be firmly fixed on the outer peripheral side of the part to be cooled, and the cooling hole 102
Is not deformed.

Next, an outline of a method of processing the work 18 using the spinning processing apparatus 40 will be described. First, FIG.
After setting the mold 46 on the main shaft 42 as shown in FIG.
For example, the work 18 is attached to the end surface 46a of the mold 46. At this time, the boss 12 is inserted into the concave portion 50 provided at the center of the end surface 46a of the molding die 46, and further, the protrusion 110 provided at the peripheral portion of the end surface 46a of the molding die 46 is provided.
Is inserted into the hole 122 of the metal disk 16 of the work 18 to attach the work 18 to the forming die 46.

Thereafter, the end face of the clamper 48 is
By pressing the metal disk 16 of No. 8 from the opposite side of the forming die 46, the metal disk 16 of the work 18 is sandwiched between the forming die 46 and the clamper 48. At this time, the pressing portion 107 provided on the end face of the clamper 48 presses a portion of the metal disk 16 which is to be the bottom 14a of the yoke 14 later than the hole 122 which is to be the cooling hole 102. Will be done.

When the main shaft 42 is rotated at this stage, the work 18 directly connected to the forming die 46 is rotated, and in this state, the roller 49 presses the metal disk 16 of the work 18 in the direction of the forming die 46. The metal disk 16 is processed into the shape of the yoke 14 by fitting the metal disk 16 into the molding die 46.

Hereinafter, a method of manufacturing the rotor 10 will be specifically described. First, as shown in FIG.
A hole 122 serving as the cooling hole 102 and a center hole 26 serving as a hole for inserting the projection 28 (see FIG. 4) of the boss 12 are formed in the metal disk 16 and the boss 12. Part 1
A plurality of stopper holes 30 for fixing 2 are formed concentrically. Thereafter, the convex portion 28 of the boss portion 12 is inserted into the center hole portion 26 of the metal disk 16, and the boss portion 12 and the metal disk 16 are fixed to each other with the stopper 34 as shown in FIG. 4 or FIG. .

At this stage, the axis of the boss 12 is aligned with the axis of the metal disk 16, the metal disk 16 and the boss 12 are fixed, and the work 18 is manufactured.

Thereafter, the spindle 4 of the spinning device 40
The mold 18 is set on the mold 2, and the work 18 is attached to the mold 46 while inserting the boss 12 of the work 18 into the recess 50 of the mold 46 as shown in FIG. 6. Work 18
When the spinning process, the mold 46 and the clamper 4
And 8. Workpiece 18 with clamper 48
A resilient member 60 for pressing to the side may be provided in the hollow portion 62 of the mold 46.

Next, as shown in FIG. 9, the main shaft 42 of the spinning apparatus 40 is driven to rotate, the work 18 is rotated, and the roller 49 presses the metal disk 16 in the direction of the forming die 46. Preliminary bending is performed by moving in the direction of the main shaft 42. The roller 49 rotates with the rotation of the work 18.

Next, as shown in FIG.
, And the metal disk 16 is adapted to the second cylindrical portion 132. This is because the roller 49 is moved in parallel with the axial direction of the main shaft 42 of the spinning device 40 so that the metal disc 1
6 is moved in the direction of the main shaft 42 while pressing in the direction of the second cylindrical portion 132, and the roller 49 is hit against the end of the first cylindrical portion 130. By this abutting molding, the boundary portion between the bottom portion 14a and the peripheral portion 14b of the yoke 14 by the metal disk 16 is recessed along the step 118, and the pedestal 106 in the magnet mounting portion 103 is formed.

Next, as shown in FIG.
The ironing process is performed, and the metal disk 16 is adapted to the first cylindrical portion 130. This means that the roller 49 is moved in parallel with the axial direction of the main shaft 42 of the spinning device 40 so that the metal disk 16
While pressing the main shaft 4 in the direction of the first cylindrical portion 130.
This is performed by moving in the direction of 2. By this ironing, the peripheral portion 1 of the yoke 14 by the metal disc 16
4b, a portion corresponding to the groove 113 of the mold 46 is recessed along the groove 113, and a plurality of protrusions 105 are formed on the inner wall side of the peripheral portion 14b. That is, the magnet mounting portion 1 is attached to the inner wall of the peripheral portion 14b of the yoke 14 formed of the metal disk 16.
A recess 104 at 03 will be formed.

As a result of the spinning by the rollers 49, the metal disk 16 of the work 18 is brought into close contact with the peripheral surface 46b of the forming die 46 to form the yoke 14, as shown in FIG. Then, clamper 48
Is separated from the yoke 14, and the yoke 14 is separated from the mold 46, whereby the rotor 10 shown in FIG. 1 is completed.

As described above, in the manufacturing method according to the present embodiment, when the yoke 14 is formed by spinning the metal disk 16 having the hole 122 to be the cooling hole 102 later. Since the pressing portion 107 provided on the clamper 48 fixes the outer peripheral side of the portion of the metal disk 16 that will later become the bottom portion 14a of the yoke 14, the cooling hole portion 102 can be formed even by the subsequent spinning process. No deformation.

In this case, since the pressing portion 107 is constituted by two ring-shaped projections 108a and 108b, the portion of the metal disk 16 which will later become the bottom 14a of the yoke 14 is formed. The outer peripheral side can be firmly fixed, and the subsequent spinning does not deform the hole 122 that will later become the cooling hole 102.

Since the boss 12 is attached to the metal disk 16 before the spinning, the boss 12 is fixed after the spinning.
Not only is a post-process not necessary for attaching the hologram, but also a decrease in dimensional accuracy due to the post-process can be prevented.

Since the molding die 46 having the concave portion 50 into which the boss 12 is inserted is used as the molding die 46, the metal disk 16 having the boss 12 is formed from the side of the boss 12. The mold 46 can be joined, and when manufacturing the rotor 10 having the boss portion 12 and the yoke 14, a true dimension having a secured dimensional accuracy can be obtained without performing a cutting process for securing the dimensional accuracy in a later process. The rotor 10 having a circularity and a coaxiality can be easily manufactured.

In the step of fixing the boss 12, the axis of the metal disk 16 is made to coincide with the axis of the boss 12, and the metal disk 16 and the boss 12 are fixed using the stopper 34. As a result, the boss portion 12 can be easily fixed to the metal disk 16 and the process can be simplified.

As the forming die 46, the metal disk 1
Since the molding die 46 having a shape corresponding to the shape of the hole 122 of the metal disk 6 and having the projection 110 inserted into the hole 122 of the metal disk 16 in the clamping step is used, Is clamped between the clamper 48 and the molding die 46, the protrusion 110 is inserted into the hole 122 of the metal disk 16. As a result, deformation of the inner peripheral edge of the hole 122 of the metal disk 16 during spinning is blocked by the protrusion 110 of the molding die 46, and deformation of the hole 122 that will later become the cooling hole 102 is prevented. Can be.

Further, as the molding die 46, the yoke 1
Since the molding die 46 having the molding portion 116 for forming the magnet attachment portion 103 on the peripheral portion 14b of the magnet 4 is used, the magnet attachment portion 1 is used in spinning.
As a result, the post-process for providing the magnet mounting portion 103 after the spinning is not only unnecessary, but also it is possible to prevent a decrease in dimensional accuracy due to the post-process.

In this case, the molding portion 1 of the molding die 46
16 has a step 114 formed in a circumferential direction on a peripheral portion 134 of a portion facing the metal disk 16, and a groove 113 formed in the outer peripheral surface of the forming die 46 in parallel with the axial direction. Then, in the spinning step using the molding die 46, the peripheral portion 14b of the yoke 14 is formed, and the magnet attachment portion 103 is formed on the inner wall of the peripheral portion 14b of the yoke 14. A step 118 is generated in the step 14, and a magnet can be disposed on the step 118. Further, since the projections 105 and the recesses 104 for fixing the magnets are formed by the grooves 113 formed in parallel with the axial direction, a post-process such as positioning the magnets is not required.

It should be noted that the method and apparatus for manufacturing a rotary electric machine rotor according to the present invention are not limited to the above-described embodiment, and may adopt various configurations without departing from the gist of the present invention. is there.

[0057]

As described above, according to the method and apparatus for manufacturing a rotor for a rotating electric machine according to the present invention, in the outer rotor type generator or motor having a cooling hole in a yoke, the cooling hole is used. The yoke can be formed into a substantially cup shape without deforming the rotor, and the yield of the rotating electric machine rotor can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotor manufactured by a manufacturing method according to an embodiment.

FIG. 2 is a side sectional view of a rotor.

FIG. 3 is a front view of a metal disk having a hole and a cooling hole around the center and the center, respectively.

FIG. 4 is a perspective view of a boss.

FIG. 5 is a side view of the spinning apparatus.

FIG. 6 is a side sectional view showing a state in which a boss and a metal disk are sandwiched between a mold and a clamper.

FIG. 7 is a perspective view of a molding die.

FIG. 8A is a perspective view of a clamper, and FIG. 8B
3 is a sectional view of a clamper.

FIG. 9 is a side view showing a state in which preliminary bending is being performed on the metal disk.

FIG. 10 is a side view showing a state in which butting is performed on a metal disk.

FIG. 11 is a side view showing a state in which ironing is performed on a metal disk.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Rotor 12 ... Boss part 14 ... Yoke 14a ... Bottom part 14b ... Peripheral part 16 ... Metal disk 18 ... Work 34 ... Stopper 40 ... Spinning apparatus 46 ... Molding die 48 ... Clamper 49 ... Roller 102 ... Cooling hole 103: Magnet mounting portion 104: Recess 105: Protrusion 106: Pedestal 107: Pressing portion 108a, 108b: Protrusion 110: Protrusion 113: Groove 114: Step 116: Forming part 118: Step 120: Recess 122: Hole 130: first cylindrical portion 132: second cylindrical portion 134: peripheral portion

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichi Okada 1-10-1 Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. F-term (reference) 5H002 AA07 AA08 AE08 5H615 AA01 BB01 BB02 BB07 PP02 PP07 SS03 SS04 SS10 SS13 5H622 AA02 CA02 CA07 CA10 CB01 PP10

Claims (6)

[Claims] 1. A method for manufacturing a rotor for a rotating electrical machine, comprising a step of forming a substantially cup-shaped yoke having a bottom and a peripheral portion by molding a metal disk, wherein the yoke has one or more cooling members at the bottom. The metal disk has one or more holes that will later become one or more cooling holes in the yoke, and the step includes forming the metal disk with a clamper. A clamping step of clamping with a mold, and a spinning step of performing a spinning process on the metal disc to form a peripheral portion of the yoke, wherein the forming die corresponds to a shape of a hole of the metal disc. A mold having a shape and having a projection inserted into a hole of the metal disk in the clamping step is used, and as the clamper, the metal disk later becomes the bottom of the yoke. Press the outer peripheral side of the part Method of manufacturing a rotary electric machine rotor, characterized by using a clamper having a pressing portion configured in at least one turn of the ring-shaped protrusion of the order. 2. A method for manufacturing a rotor for a rotating electrical machine according to claim 1, wherein said yoke has a boss portion fixed to a rotating shaft of a motor fixed to a bottom portion thereof, and said one or more cooling portions. A hole having a hole, and a mold having a concave portion into which the boss is inserted is used as the mold, and in the step, the axis of the metal disk and the axis of the boss are aligned. A method of manufacturing a rotor for a rotating electrical machine, comprising a boss fixing step of fixing the metal disk and the boss using a fastener. 3. The method for manufacturing a rotor for a rotating electrical machine according to claim 1, wherein the forming die includes a forming portion for forming a magnet mounting portion on an inner peripheral portion of the yoke. The molding portion includes a step formed in a circumferential direction on a peripheral portion of a portion facing the metal disk, and a groove formed in an outer peripheral surface of the mold in parallel with an axial direction. In the spinning step using a mold, a method for manufacturing a rotor for a rotating electric machine, wherein a peripheral portion of the yoke is formed and a magnet mounting portion is formed on an inner peripheral portion of the yoke. 4. An apparatus for manufacturing a rotor for a rotating electrical machine, wherein a substantially cup-shaped yoke having a bottom portion and a peripheral portion is formed by molding a metal disk, wherein the yoke has one or more cooling holes at a bottom portion. The metal disk has one or more holes that will later become one or more cooling holes in the yoke, and clamping means for clamping the metal disk with a clamper and a mold. A spinning means for forming a peripheral portion of the yoke by performing spinning on the metal disk, wherein the clamper has at least one turn for pressing an outer peripheral side of a portion to be a bottom portion of the yoke later. A pressing portion formed of a ring-shaped protrusion; the molding die has a shape corresponding to a shape of a hole of the metal disk; and the metal circle is formed by a holding operation by the holding means. In the hole of the board Apparatus for manufacturing a rotary electric machine rotor characterized by having a projection to be input. 5. The apparatus for manufacturing a rotor for a rotating electrical machine according to claim 4, wherein said yoke has a boss portion fixed to a rotating shaft of a motor fixed to a bottom portion thereof, and said one or more cooling members. An apparatus for manufacturing a rotor for a rotating electrical machine, comprising: a hole, wherein the mold has a recess into which the boss is inserted. 6. The apparatus for manufacturing a rotor for a rotating electrical machine according to claim 4, wherein the forming die has a forming portion for forming a magnet mounting portion on an inner peripheral portion of the yoke. The molding portion is a step formed in the peripheral direction at a peripheral portion of a portion facing the metal disk, a groove formed on the outer peripheral surface of the molding die, and parallel to the axial direction of the molding die. An apparatus for manufacturing a rotor for a rotating electrical machine, comprising: