JPS608068A - Method of piling up laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a1 Technical Field of the Invention The present invention relates to a method for manufacturing a laminated cylindrical body such as a rotor of a motor, and in particular, it is possible to obtain a laminated body with good adhesion without displacement of the laminated plates. Concerning the method of stacking laminates.

佽）Technological background In recent years, with the advancement of office automation, various printers have been developed and put into practical use as business machines such as computer terminals and word processors. However, these printers use small motors for driving. ing. The rotor of a small motor is manufactured by stacking and caulking laminated sheets of steel plates having a predetermined shape while press-fitting them into a shirt l-.

It is necessary that the press-fitting into the shaft does not cause any displacement of the laminated plate.

telPrior art and problems Below, the conventional method is shown in Figures 1 and 2 (al and (b).
). FIG. 1 is a perspective view illustrating a rotor of a small motor to which the present invention is applied, and FIG. 2 (al and other) is an explanatory diagram of a conventional method.

As shown in FIG. 1, a rotor 1 has laminated plates 2 made of magnetic plate members formed into a predetermined shape by a press or the like, which are piled up, and a shaft 5 is press-fitted into a shaft hole 4 at the center.

In the conventional method of processing and assembling, as shown in FIG. 2 (al), a shaft hole 4 is bored in the WINI2O3 core. Also, slot holes 1-3 are formed radially.

As shown in FIG. 2(b), the stacked mold 6 is provided with a guide 7. The guide 7 guides the slot 3 in order to prevent the phase shift of the laminated plate 2. The laminated plates 2 are assembled by having the slots 3 guided by the guides 7 and being press-fitted into the shaft 5 one by one.

In this case, a press-fitting allowance is provided between the diameter of the shaft hole 4 of the laminated plate 2 and the diameter of the shaft 5.

However, according to this method, the guide 6 has the slot 3.
There is a disadvantage that when the laminate 2 is guided, the laminate 2 may be deformed and misaligned.

If misalignment occurs, the effective cross-sectional area of the slot 3 will decrease, and the occupation rate will decrease when a coil (not shown) is wound.

In a normal case with no misalignment, the occupancy rate when winding a coil in slot 3 is, for example, about 30%, but if misalignment occurs, the coil may protrude from slot 3, and while guiding the outer periphery of the laminate. Since the coil is being wound, winding cannot continue any longer. If the slot 3 is filled with coils even if they do not protrude, there is an additional work to push the coils into the slot 3 in the post-winding process, which is time consuming and requires many man-hours.

Furthermore, after winding the coil, when polishing the outer periphery to achieve rotational balance, if there is a misalignment in the laminated plate 2, the polishing will not be done uniformly, making it difficult to balance within the outer diameter tolerance, and there will be parts that are not polished. If so, the disadvantage is that the magnetic properties deteriorate.

(d) Object of the Invention The object of the present invention is to solve the above-mentioned drawbacks, and to provide a method for stacking laminates that can prevent the stacking of laminates from shifting.

(81) Structure of the Invention The present invention is a laminate stacking method characterized by forming a plurality of notches along the outer periphery of the laminate, thereby achieving the object.

(f) Embodiment of the Invention An embodiment of the invention will be described below with reference to FIGS. 3 and 4. FIG. 3 is a plan view showing an embodiment according to the present invention, and FIG. 4 is a partially enlarged view of FIG. 3. The same reference numerals indicate the same objects throughout the figures.

As shown in FIGS. 3 and 4, the peripheral area of the laminate 12,
That is, an arcuate notch 13 having a predetermined radius R is formed at each tip of the radial molded portion.

The same number of convex portions through which the cutout portions 13 are guided are provided on the inner surface of the laminated mold (not shown) on which the laminated plates 12 are stacked.

With such a configuration, when stacking the laminate plates 12 one after another into a laminate mold, the notch 13 on the periphery is guided by the convex part of the laminate mold, and the stacking is performed without any misalignment. .

In this way, the phase shift of the laminated plate 12 is prevented, and the winding space is freed, making the coil winding work easier, making it easier to balance the rotation in the polishing process, and creating a rotor with high precision that makes it easy to maintain magnetic properties. 1 can be obtained.

Needless to say, the above-mentioned notch portion 13 is formed at a position and size that does not affect rotational unevenness and magnetic properties of the rotor 1.

(As explained in detail in the previous invention, according to the present invention, a plurality of notches are formed on the outer periphery of the laminate and the layers are stacked using these as guides, so it is possible to prevent the phase shift of the laminate. This has the effect that a highly accurate laminate can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a rotor of a small motor to which the present invention is applied, FIG. 2 (al and mountains) is an explanatory diagram showing a conventional method, and FIG. 3 is a plan view showing an embodiment according to the present invention. Fourth
The figure is a partially enlarged view of FIG. 3. In the figure, 1 is a rotor, 2 and 12 are laminated plates, 3 is a slot, 4 is a shaft hole, 5 is a shaft, and 13 is a notch. Figures 1 and 2 (a) (f)). □□ 7 1.1 Wl (' Ko 3 Figure 4

Claims (1)

[Claims] A method for manufacturing a laminate formed by stacking laminates, the method comprising forming a plurality of notches along the outer periphery of the laminate.