JP4463338B2 - Method for manufacturing rotor yoke for rotating machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to a manufacturing method of a rotary machine for Rotayo click the salient portion inside or outside is formed in the rotor yoke.
[0002]
[Prior art]
For example, a rotor yoke assembly shown in FIG. 11 is known as a motor with a brake used in a crossing circuit breaker.
That is, the motor yoke 102 and the brake yoke 103 constituting the skeleton of the rotor yoke assembly are caulked to the rotor boss 101 by the thin flat rivet 101A and fixed to the shaft 100 side. Further, the motor yoke 102 and the brake yoke 103 are provided with magnets 102A and convex pole pieces 103A on the inner peripheral surfaces, respectively. Usually, the magnet 102A is an adhesive and the convex pole pieces are spot welded. It is fixed.
[0003]
[Problems to be solved by the invention]
However, such a configuration has the following drawbacks.
(1) Since the convex pole pieces are spot-welded, the manufacturing man-hours are increased.
(2) When the rotor yoke assembly is plated for rust prevention, the plating solution remains in the gap between the spot-welded yoke and the protruding pole piece, which causes corrosion, and then adheres to the gap. That treatment to penetrate the agent is necessary,
(3) Since the rotor boss and the rotor yoke are formed separately and then assembled together, the cost is high.
[0004]
In addition to this type, a type in which the rotor yoke 104 and the rotor boss 105 are caulked with a thin flat rivet 105A has been proposed and developed, for example, as shown in FIG. Has produced. Such a situation is found not only in the rotor yoke assembly applied to the motor with a brake used in the railroad crossing barrier, but also in the rotor yoke assembly used in various other fields.
[0005]
Accordingly, the present invention aims to provide a rotary machine for Rotayo click method of manufacturing it is possible to prevent the occurrence of corrosion with view of the above circumstances, it can be easily manufactured also be provided with a salient portion and the boss It is what.
[0006]
[Means for Solving the Problems]
That is, the invention according to claim 1 is a method of manufacturing a rotor yoke for a rotary machine, wherein a convex pole portion is formed inside the rotor yoke, and the convex pole portion and the boss portion fixed to the shaft are formed integrally with the rotor yoke body. A plate with a hole in the center of the plate is pressed to form bosses and key grooves, and a bowl-shaped workpiece is formed by drawing, and the inner and outer peripheral surfaces of the side wall of the bowl-shaped workpiece are pressed. the uneven portions are alternately formed in thrust out processing by machine, the outer circumferential surface a convex portion of the outer peripheral surface is obtained by forming the salient portion on the inner peripheral surface by cutting so flat.
[0007]
According to a second aspect of the present invention, when the bowl-shaped processed product is formed, a plate material is set in a mold and is pressed by a die and a punch .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a motor with a brake used for a crossing circuit breaker to which a rotor yoke of a non-contact type brake according to the present invention is applied (other than this, for example, a rotor yoke for an SR motor can also be applied). .
[0009]
In this embodiment, as shown in FIG. 2, the convex pole portion 1A is integrally formed on the inner peripheral surface of the brake yoke 1, and the brake yoke 1 and the boss 2 (with the key groove 2A) are integrally formed. ing. In this embodiment, the boss 4 (with a key groove) is also formed integrally with the rotor yoke 3. Reference numeral 5 denotes a magnet fixed to the inner peripheral surface of the rotor yoke 3.
[0010]
Next, a method for manufacturing a rotor yoke for a rotary machine according to the present invention will be described, particularly for the type having a convex pole portion on the inner side according to the brake yoke 1 of the previous embodiment.
[0011]
(I) First, as shown in FIG. 3, a perfect circular plate material (which can be formed as long as a magnetic path is formed is possible. In this embodiment, particularly, an iron plate processed to an appropriate thickness by rolling or the like. 10 is used, and a circular hole 10A is opened at the center by a press or the like (first step).
(II) Next, another pressing machine is prepared, and the boss 2 is formed by pressing the plate material 10 set in a desired die with the pressing machine, and the key groove 2A is formed by performing broaching with the press. (Refer FIG. 4) (2nd process).
[0012]
(III) Further, another press machine is prepared, and the plate material 10 is set in an appropriate die. For example, as shown in FIG. The processed product 11 is formed (see FIG. 6) (third step).
(IV) Further, in the same manner, the secondary drawing is performed to form a stepped bowl-shaped processed product 12 (see FIG. 7) (fourth step).
[0013]
(V) After that, extrusion processing is performed by a press machine to form a processed product 13 having uneven portions formed alternately on the side wall surfaces as shown in FIG. 8 (fifth step).
(VI) Finally, the convex portion 13A on the outer peripheral surface of the processed product 13 is cut to the same level as the concave portion 13B by using a press or a processing tool such as a lathe as appropriate (sixth step).
As a result, the brake yoke 1 in which the convex pole portion 1A is integrally formed on the inner peripheral surface and the boss with the key groove is also integrally formed is completed.
[0014]
Next, another rotor yoke manufacturing method of the present invention will be described.
In this embodiment, as shown in FIG. 9, the rotor yoke 6 in which the convex pole portion 6A and the boss 7 are integrally provided on the outside is manufactured. Basically, the previous manufacturing method and the fourth step (FIG. The same applies to 7).
In the manufacturing method of this embodiment, a convex machine 6A is formed by using a press machine and press-cutting the outer peripheral surface at an appropriate depth at a plurality of locations at desired intervals as shown in FIG. The
[0015]
In the present invention, of course, the present invention is not limited to this level crossing circuit breaker, and can be applied to an outer rotor portion used in, for example, each part related to architecture and automobiles.
[0016]
【The invention's effect】
As described above, according to the present invention, in the method for manufacturing a rotor yoke for a rotary machine, the convex pole portion is formed inside the rotor yoke, and the convex pole portion and the boss portion fixed to the shaft are formed integrally with the rotor yoke body. A plate with a hole in the center of the plate is pressed to form bosses and key grooves, and a bowl-shaped workpiece is formed by drawing, and the inner and outer peripheral surfaces of the side wall of the bowl-shaped workpiece are pressed. the uneven portions are alternately formed in thrust out processing by machine, the inner convex portion of the outer peripheral surface as the outer peripheral surface is flat, or the inner peripheral surface of the convex portion of the inner peripheral surface is cut to be flat Since the convex pole part was formed on the peripheral surface, it was not necessary to form the convex pole piece separately and spot welded to form the convex pole part, not only reducing the manufacturing cost accompanying the reduction in man-hours, There is a gap between the protruding pole piece and the rotor yoke body. There no longer be formed, the adhesion process to the gap is unnecessary, thereby improving the quality.
[0017]
Moreover, according to the present invention, in the case where the boss portion for fixing the rotor yoke to the shaft is formed integrally with the rotor yoke body, it is not necessary to form the rotor boss of the inner diameter portion separately and fasten it with a rivet or the like. Therefore, the work man-hours and manufacturing costs can be further reduced.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing a motor with a brake used in a crossing breaker according to the present invention.
FIG. 2 is a perspective view showing a brake yoke used in the motor.
FIG. 3 is a process diagram showing a method for manufacturing a rotor yoke according to the present invention.
FIG. 4 is a process diagram of the same.
FIG. 5 is a process diagram of the same.
FIG. 6 is a process diagram of the same.
FIG. 7 is a process diagram of the same.
FIG. 8 is a process diagram of the same.
FIG. 9 is a half sectional view showing another motor with a brake according to the present invention.
FIG. 10 is a process diagram showing another manufacturing method.
FIG. 11 is a sectional view showing a conventional motor with a brake.
FIG. 12 is a schematic half sectional view showing another conventional rotor yoke and the like.
[Explanation of symbols]
1 Brake yoke 1A Convex pole part 2 Boss 2A Keyway 3, 6 Rotor yoke 4, 7 Boss 6A Convex pole part

Claims (2)

In the method for manufacturing a rotor yoke for a rotating machine, a convex pole portion is formed inside the rotor yoke, and the boss portion fixed to the convex pole portion and the shaft is formed integrally with the rotor yoke body.
Press the plate with holes in the center of the plate to form bosses and keyways, and form a bowl-shaped processed product by drawing,
The uneven portions are alternately formed at the processing out thrust by the press machine on the inner peripheral surface of the side wall surface of the cup-shaped workpiece,
A method of manufacturing a rotor yoke for a rotary machine, wherein a convex pole portion is formed on an inner peripheral surface by cutting a convex portion on an outer peripheral surface so that the outer peripheral surface becomes flat.   2. The method of manufacturing a rotor yoke for a rotary machine according to claim 1, wherein when forming the bowl-shaped processed product, a plate material is set in a mold and is pressed by a die and a punch.

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