JPS6188747A - Preparation of laminated core - Google Patents

Abstract

PURPOSE:To improve working property at the time of welding, by forming spaces every separating unit thickness of laminated silicon steel sheets and by separating the sheets from the spaces after the sheets are continuously welded through the spaces. CONSTITUTION:The specified quantity of silicon steel sheets 4 punched in a specified form as stator core for a motor or the like is laminated, and the laminated core sheets 1a, 1b are formed in separating unit thickness, and salient sections 5 of a specified height are provided the thickness by the thickness for the surface where the silicon steel sheets 4 at the end sections are mutually laminated. Then, spaces 6 are formed between the adjacently laminated core sheets, and in this state, the sheets are continuously welded through the spaces at the angle of 90 deg. to the outer periphery. The continuously welded laminated core is formed with a plurality of the continuously welded sections 2, and the laminated core sheets of unit thickness can be easily separated from said spaces 6. In this manner, labor or the like for inserting spacers for the separation is not needed, and the working property can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated iron core made of thick steel sheets, which is used as an iron core for, for example, an electric motor, a generator, or a transformer. The present invention relates to a method for manufacturing a laminated core in which the laminated core is continuously welded into a solution layer, and the continuously welded laminated core can be easily separated into unit thicknesses.

The conventional manufacturing method for this type of laminated core is shown in Figures 1 and 2.
As shown in the figure, a predetermined number of silicon steel plates are laminated to form a predetermined thickness, that is, a separation unit thickness srLJ, and a spacer (3) with poor weldability is formed for each separation unit thickness [shi]. are inserted, weld them in the longitudinal direction at predetermined positions on the outer periphery, for example, at 90 intervals in the circumferential direction as shown in Fig. Laminated cores (1a) and (1b) were formed.

However, in the conventional laminated core manufacturing method described above, in order to continuously weld a large number of laminated cores, a weldable q spacer (3) must be inserted for each separation unit thickness "L" of the laminated core (υ). Therefore, there is a drawback that manual operations such as inserting and removing the spacer (3) are extremely troublesome.

The present invention has been made with attention to this point, and it is an object of the present invention to provide a method for manufacturing a laminated core that simplifies continuous welding by omitting the above-mentioned spacers inserted for each unit thickness of the laminated core. That is.

That is, FIGS. 6 to 5 each show an embodiment of the present invention. For example, a predetermined number of sheets punched in a predetermined shape C as a stator core of an electric motor or a generator. Laminated cores (1a) (1b) by laminating silicon steel plates (4)
While forming the separation unit thickness "L".

For each separation unit thickness “L”, the silicon steel plate (4
), protrusions (5) of a predetermined height are provided at predetermined intervals on the surface where the silicon steel plates are laminated, that is, the laminated surface, and
As shown in the figure, laminated cores (1a) stacked adjacently
After forming a gap (6) of a predetermined size between and (1b), as shown in FIG. weld,
These multiple continuous welds (2) form a continuously welded laminated core, and since the silicon steel plates are not welded together in the gap (6), the laminated core is continuously welded in this way. In order to separate it into unit thickness "L", it can be easily separated from the gap (6) formed by the above-mentioned starting part (5).

As described above, in order to separate the laminated cores (1a) and (1b) continuously welded by the continuous welding part (2) into units of unit thickness 'L', silicon A gap (6) is formed by a protrusion (5) of a steel plate (4), and like the conventional one mentioned above,
In order to separate the continuously welded laminated iron core into unit thicknesses, there is no need to insert spacers with poor weldability during welding, which not only significantly improves work efficiency, but also reduces costs by eliminating the need for spacers. It also has the effect of contributing to

In addition, in the above-mentioned embodiment, the iron core is as follows.

I have described the case of the stator core of an electric motor or generator, but the same effect can be obtained with a single rotor core. It goes without saying that a rotor core with a "skew" can be manufactured by incorporating the mechanism into a mold. Further, FIGS. 6 to 9 show other embodiments of the present invention, in which fRN cores (1
a) (1bL) In order to form a gap (6) between (1c), as shown in FIG. 6 and FIG. Multiple notches at the position: 1 (to form an l,
In Table 4, the iron core is separated into unit thickness "L" by continuous welding by a plurality of continuous welds (2).
&ζ Therefore, the formed gap (6) cannot be simply separated, which is exactly the same as in the above-mentioned embodiment.

Rough (・shi 1. In both the above-mentioned examples, silicon steel plate (
As a means for forming the protrusion (5) or notch uq in 4), for example, in a progressive die that punches out the protrusion (5) into a predetermined shape, in order to separate it into unit thicknesses, When the number of silicon steel plates reaches a predetermined number by counting the number of times the breath ram descends, a cutter for forming the protrusion (5) is intermittently operated by a cam in a stage before the welding stage in the mold. By operating it, a plurality of protrusions (5) or notches αq are formed on only one silicon steel plate, and the unit thickness is
A gap (6) may be created for every "L" and welding may be performed continuously.

Furthermore, similar effects can be obtained when the present invention is applied to the manufacture of transformer cores.

As described above, according to the present invention, voids are formed for each separation unit thickness of laminated silicon steel plates, and after continuous welding is performed in the longitudinal direction across the voids, the laminated silicon steel plates are separated from the voids. Since the laminated core of unit thickness is obtained, there is no need to insert a spacer with poor weldability during welding in order to separate the continuously welded laminated core into units of thickness, so work efficiency is significantly improved. Furthermore, eliminating the need for spacers also contributes to cost reduction.

[Brief explanation of the drawing]

Figures 1 and 2 show the conventional method of manufacturing a laminated core. Figure 1 is a plan view of a continuously welded laminated core;
The figure is a longitudinal cross-sectional view of a continuously welded laminated core. Figure 6~
FIG. 5 shows an embodiment of the present invention in which the collapse occurs.
The figure is a side view showing one laminated core, FIG. 4 is a plan view, and FIG. 5 is an enlarged sectional view of the main part. Figures 6 to 9 all show other embodiments of the present invention; Figures 6 to 8 are plan views of a silicon steel plate, and Figure 9 is a longitudinal cross-sectional view of a continuously welded laminated core. It is. In the drawings, (1a), (1b), and (1c) are laminated cores, (2) is a continuous weld, (4 is silicon steel plate, and (5 is
) is the protrusion, (6) is the gap, (IQ is the notch, and L) is the thickness of the laminated core. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A gap is formed between the silicon steel plates for each separation unit thickness of the laminated silicon steel plates, and after continuous welding in the longitudinal direction and across the gap, the laminated silicon steel plates are separated from each other and separated into units of thickness. A method for manufacturing a laminated iron core, characterized by obtaining a laminated iron core. (2) A method for manufacturing a laminated core according to claim 1, characterized in that a protrusion is provided on the laminated surface of the silicon steel plates for each separation unit thickness to form a void. (3) A method for manufacturing a laminated core according to claim 1, characterized in that a gap is formed by providing a notch in the periphery of the silicon steel plate for each separation unit thickness. (4) The method for manufacturing a laminated iron core according to claim 1, wherein the laminated silicon steel plates are continuously welded in the longitudinal direction at predetermined intervals in the circumferential direction of the outer periphery of the laminated silicon steel plates.