JPS58195449A - Stator for motor or generator and manufacture thereof - Google Patents

Abstract

PURPOSE:To simplify manufacture a stator by punching a steel strip in the prescribed shape, spirally twisting the strip by continuous cold rolling and then pressing the strip. CONSTITUTION:Grooved notches 3a are formed at one side and heat radiating fin projections 4a are formed at the other side of a steel strip 2 at an equal interval, the strip is spirally twisted by continuous cold rolling and cut in the prescribed length. Then, the cut spiral strip 5 is axially pressed and welded at the outer periphery in the state spirally twisted intimately in contact. Thus, after pressing, the strip does not require secondary machining, and the manufacture can be accordingly simplified, and the sectional shape of the strip is spirally superposed. In this manner, the magnetic characteristics similar to the stator of axially superposed and punched type from the strip can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator for electric motors and generators, and a method for manufacturing the stator.

Conventionally, stators used in electric motors and generators have been either cast as shown in Figure 1 or stacked with donut-shaped iron plates punched out as shown in Figure 2. Product A has a magnetic groove with a wide inner side, which is difficult to mold using a mold, and has the disadvantage that when it is used as a core for an electric motor, magnetostriction is large and electric energy is largely dissipated.

In addition, although the magnetostriction in the core is reduced in the stator C in which the annular iron plates d are stacked, since it is constructed by punching out a large number of annular bodies from iron plates, the amount of steel plate material used increases, which goes against resource conservation. It was something to do.

In view of the above problems, the present invention proposes a method for manufacturing a stator for motors and generators that is simple to manufacture, has good electrical efficiency, and uses less steel plate, and provides the stator. The purpose is to

That is, the stator of the electric motor and generator of the present invention is produced by punching a steel plate of an appropriate thickness into a strip shape, and then rolling the strip steel plate into a tight spiral shape by continuous cold rolling. It is made by cutting a steel plate to an appropriate length and press-bonding it in the winding direction, and does not require secondary processing after pressure-bonding and fixing.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
Figures 5 through 5 show the manufacturing process of the present invention.

1. In FIG. 3, 2 is a strip-shaped steel plate punched from a steel plate of an appropriate thickness, and m pieces A of the strip-shaped body have edges slightly smaller than the cross-sectional shape of the magnetic grooves 6 formed on the inner periphery of the stator 1. Magnetic groove notches 3a with enlarged portions are uniformly arranged, and radiation fin protrusions 4a having the cross-sectional shape of the radiation fins 4 are equally arranged on the other side B.

The magnetic groove notches 6a and the radiation fin protrusions 4a are arranged in an integer number per length corresponding to one spiral turn in the next step.

■1 Next, Fig. 4 shows that the steel plate 2iIA side is turned inside using a spiral manufacturing technique that involves continuous cold rolling of a strip material known in the art (for example, see Japanese Patent Publication No. 54-2189). The end face of the spiral steel plate 5 forms a concentric circle with the width of the strip steel plate 2 as an inner diameter D1 and an outer diameter D2, and each magnetic groove notch 3a and radiation fin protrusion 4a are arranged at the pitch of the spiral steel plate 5. laps match, etc. 1
・Disposed at the same angular position, (1) Next, after cutting the spiral steel plate 5 to a desired length, the spiral was pressurized from both ends as shown in Fig. 5 to close the spiral in the axial direction. In this state, each heat dissipation fin protrusion 4a is fixed 6 by welding or adhesive, etc. to form a cylindrical body, and constitutes the stator 1. Each magnetic groove cutout groove a is a continuous magnetic groove groove in the axial direction, and each The heat dissipation fin protrusion 4a forms a heat dissipation fin/4 continuous in the axial direction.

The stator 1 for an electric motor, generator, etc. of the present invention is constructed in the manner described above, and since its cross-sectional shape is in a rolled-up shape, it is a stamped stacked stator made by stacking steel plates in the axial direction. It comes to have magnetic properties similar to that of
l Also, according to the present invention, when punching the strip steel plate 2, as shown in FIG. 6, the magnetic groove notches 3a and the heat dissipation/in projections 4a are configured to correspond 1:1 or an integral multiple. As a result, each radiation fin 4a can be punched out from the cutout portion of the magnetic groove notch 3a, and the steel plate can be used extremely efficiently.

Furthermore, according to the present invention, since the stator is configured in a winding and overlapping manner, it not only has features such as high finishing accuracy of the inner diameter D1 and no need for finishing processing, but also has features such as the fact that the stator extends in the axial direction. Even if the cross-sectional shape of the magnetic groove or heat dissipation fin is complicated, such a structure can be easily constructed by punching a strip steel plate, and the practical effects after implementation of the present invention are extremely large. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view showing a conventional cast-type stator, FIG. 2 is a partially exploded perspective view of the same punched-type stator, and FIG. 6 is a perspective view showing an example of the present invention. Figure 4 is a front view and b side view of the spiral steel plate showing manufacturing process 1 of the stator, Figure 5 is a front cross section of the stator showing manufacturing process 2. Figure and b side view,
FIG. 6 is a front view showing an example of a state in which a strip steel plate is cut. 1 - Stator 2 - Steel strip 6 - Magnetic groove 3a - Magnetic groove notch 4 - Radiation fin 4a - Radiation fin protrusion 5 - Spiral shaped steel plate 6 - Fixed part May 10, 1980 Patent applicant Hokkai Spring Co., Ltd. 13111 ．． 2 2yoshi61η 22 1.1 J5# dυ αV

Claims (1)

[Claims] The spiral steel plate is formed by rolling it into a spiral shape by continuous cold rolling, and after cutting the spiral steel plate to a desired length, it is pressed in the axial direction to form a spiral. 1. A method of manufacturing a stator for a motor or generator, characterized in that the stator is constructed by fixing the outer peripheral part or a part thereof by welding or adhesion in a tightly attached state. (2) A stator for an electric motor or generator, characterized in that a cylindrical body is formed by winding strip steel plates in a planar direction and overlapping them in an axial direction.