JPS5950082B2 - Manufacturing method of laminated core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing laminated cores used in transformers, motors, etc., and is intended to facilitate quantitative control of laminated cores.

Normally, transformers and motors often use an iron core formed by laminating a predetermined number of silicon steel plates punched into a predetermined shape.

When using such laminated cores, it is extremely important to keep the number of them constant in order to keep the characteristics of the transformer and motor constant.

Regarding conventional laminated cores, E used in transformers
This will be explained using an I-type iron core as an example.

First, when constructing a Japanese-shaped magnetic circuit 3 with an E-shaped core 1 and an I-shaped core 2 as shown in FIG. Punching the punched E-type core 1 and 1-type core 2 using a press machine.
They are arranged and taken out as shown in Figures 2 and 3, and a certain amount of lamination or a certain weight required for the transformer is measured and taken out from each aligned core group, and this is assembled into a coil. .

In this case, it is extremely inefficient to measure the lamination and weight of the cores when assembling a single transformer, and workers usually rely on visual control. This had the disadvantage that variations occurred and the characteristics of the transformer varied.

The present invention eliminates the drawbacks of the prior art as described above.

Embodiments of the present invention will be described below with reference to the accompanying drawings 4 to 18.

First, one embodiment of the present invention will be described.

As shown in FIGS. 4A and 4B, when E-shaped core 1 and I-shaped core 2 are punched out of a band-shaped silicon steel plate, the side faces of the cores 1 and 2 are the number required to construct one transformer. A mark 4 such as a notch is formed at the same location of the transformer, and the number of cores in one transformer can be controlled by the mark 4. That is, at the stage when the punching of the cores 1 and 2 for one transformer is completed, the mark 4 is formed at a different position from the previous time, in order to simplify the management of the predetermined number of cores. The cores 1 and 2 press-formed from silicon steel plates in this way are aligned and sent out from the chute of the press device as shown in FIGS. If you take it out, it will be the number of cores 1 and 2 of one transformer.

In addition, as a method of forming the marks 4, there is also a method of forming the marks 4 alternately on both sides as shown in FIGS. 5 and 6, and
As shown in FIG. 8, there is also a method in which they are provided at different heights on the same side. Next, other embodiments of the present invention will be described.

As shown in Figures 9A and 9B, when punching EI type cores 1 and 2 from a band-shaped silicon steel plate, one transformer is made; 4, and do not form mark 4 on cores 1 and 2 of the next one transformer.
Furthermore, the process of forming marks 4 on the next core 1 and 2 is repeated. EI type iron core 1 punched in this way,
2 are arranged and sent out from the chute of the press unit as shown in Figs.
This means that the number of iron cores for each individual piece can be grasped.
5 Still other embodiments will be described with reference to FIGS. 12 to 16.

In this embodiment, a mark 4 such as a protrusion or cut-out piece is formed on the front surface of the first core of the first and second groups of E and I type cores, the number required for one transformer, to control a predetermined number of cores. This is what we are trying to measure.

According to this configuration, when the iron cores 1 and 2 for each transformer are fed out in alignment from the chute of the press device, the iron cores 1 and 2 for each transformer are marked by the marks 4 made of protrusions or cut-out pieces as shown in FIGS. 14 to 16. A gap 5 is formed, making it extremely advantageous to take out one core 1, 2.

Furthermore, as other embodiments, those shown in FIGS. 17 and 18 are also conceivable.

In other words, when E and I type cores 1 and 2 are continuously punched out of a silicon steel plate, marks 4 such as notches are formed on the sides, leaving only the first or last core for one transformer. , an attempt is made to manage a predetermined number of cores using a single core without the mark 4. EI type iron core 1 in the various embodiments described above
, 2 is formed by providing a pin that can freely move in and out of a punch or die that is a press mold for punching a band-shaped silicon steel plate into an E shape or an I shape, and controlling the movement in and out of this pin. It becomes possible to form marks 4 such as notches, protrusions, and raised pieces.

Furthermore, in recent press equipment, E-shaped or I-shaped cores are not punched out using one set of punches and dies, but instead are punched out using several punches and dies, that is, several stages. From the band-shaped silicon steel plate by passing through,
The E-type and I-type cores 1 and 2 are punched without any loss or so-called scrap.

It is also possible that one stage of such a manufacturing process is the stage of forming the above-mentioned mark 4. In each of the above embodiments, the EI type core used in the transformer was described, but it may also be a UU type core or an EE type core, and in the case of a motor, it may be of a shape suitable for the motor. It can be punched out and provided with the above markings.

As described above, according to the method for manufacturing laminated cores of the present invention, the number of cores required for transformers, motors, etc. is controlled and sent out by forming marks during punching, so the number of cores is managed. This becomes extremely reliable and easy, and the characteristics of products made of this iron core are also extremely stable, which is significantly advantageous compared to visual control by workers.

Furthermore, by providing an iron core with such a configuration, it becomes possible to mechanize the quantitative extraction of the iron core, and the reliability can be greatly improved, which is of great industrial value.

[Brief explanation of the drawing]

Figure 1 is a front view showing a conventional laminated core, Figures 2 and 3
The figure is a perspective view of a core group obtained by a conventional laminated core manufacturing method, and FIGS. 4A and 4B are front views of an iron core obtained by an embodiment of the laminated core manufacturing method of the present invention. Figures 5 to 8 are perspective views of core groups obtained by the same method, Figures 9A and B are front views of cores obtained by other manufacturing methods, and Figures 10 and 11.
Figure 12 is a perspective view of a core group obtained by the same method, Figure 12 is a perspective view of a core obtained by another manufacturing method, Figure 13 is a side view of a part of the same core, and Figures 14 to 16. The figures are a perspective view and a top view of the core group obtained by the same method, Figure 17, Figure 1.
FIG. 8 is a perspective view of a core group obtained by yet another manufacturing method.゛1, 2... iron core, 4... mark.

Claims (1)

[Scope of Claims] 1. In a method of manufacturing a laminated core in which a laminated core of a predetermined shape is punched out from a band-shaped silicon steel plate using a press, aligned and sent out, a mark indicating a predetermined number of sheets to be incorporated into a product as one block is formed during pressing. A manufacturing method for laminated iron cores characterized by: 2. A method for manufacturing a laminated core according to claim 1, characterized in that marks are formed at different positions for each block of a predetermined number of sheets. 3. The method of manufacturing a laminated iron core according to claim 1, wherein a mark is provided on one block of a predetermined number of sheets, and no mark is formed on the next block. 4. A method for manufacturing a laminated core according to claim 1, wherein the mark is formed only on cores located at one end of one block of a predetermined number of cores. 5. The method for manufacturing a laminated core as claimed in claim 1, wherein the mark is formed except for cores located at one end of one block of a predetermined number of cores.