JPS5987808A - Manufacture of electromagnetic core - Google Patents

Abstract

PURPOSE:To obtain an easy manufacturing method of a core by which the completely coupled projection and recession can be punched out by one punching and the manufacture of a die is easy by a method wherein a plurality of core pieces to which the projection and recession are provided at the symmetrical position are laminated to form a core block and two same shape core blocks are coupled together. CONSTITUTION:A core piece 11, which has two grooves 8 into which windings are inserted positioned symmetrically against the center line y-y', which is perpendicular to the butting surface 7 of the core, and also has a projection 9 to one side of the center line and a recession 10, with which the projection 9 is mated, to another side, is punched out from a steel plate base material 6. The required number of punched core pieces 11 are laminated to form two core blocks 13 and 14 of the same shape and after windings are inserted into one of the blocks left and right of another block is reversed and the projection 9 of one block is mated with the recession 10 of another and a stabilizer is completed.

Description

[Detailed description of the invention] Mizumoto RL11 has unevenness on the abutting surfaces of two iron cores.

In a method of manufacturing an electromagnetic core in which two cores are fixed by fitting a convex part provided on one core into a concave part of the other core,
It can be used to manufacture ballasts for discharge lamps and small transformers.

In discharge, lamp ballasts, and small transformers, the cores are fixed together to prevent them from collapsing or misaligning.

In order to ensure the electrical characteristics of the ballast and transformer that had been completed, as shown in Fig. A convex part (4) and a concave part (5) are provided on the abutting surface with the iron core (3), and an electromagnetic core in which these convex parts and four parts are fitted is used. Conventionally, in order to make an electromagnetic core, the method shown in Fig. 2 (a>
As shown in the figure, the iron core (21) having the convex part (41) and the iron core (3) having the concave part (r5; Another method is to punch out the iron cores (21 and (3) separately using different molds and then shrink them together.The former method is the first method.

It seems to be easy because the punching process is done only 6 times, but in reality, the punched part of the convex part follows the mold of the concave part σ1, and the punched part of the concave part follows the mold of the convex part. In order to fit the shape, even if one die is used for punching, there is clearance between the punch and die of the first die. However, it is not possible to fit the concave and convex portions back together. If you forcefully fit them together, the protrusions and recesses will deform and the fit will occur [7] Electrically, iron loss will increase. Therefore, it becomes necessary to punch out the convex portions and the σ concave portions again. Furthermore, in order to punch out the iron core having four parts and the iron core having a convex part using separate dies as in the latter case, two cutting dies are required.

Moreover, in order to fit the two concave and convex parts on the left and right sides, dimensional accuracy was required for the two molds, and the molds were manufactured.

and iron core σ) There is a problem in that the cost of punching is high.

Water money r! 11 solves these problems 11. Using one punching die, the four parts and the convex part fit perfectly in one punching process - and the die is easy to manufacture, reducing production costs. The purpose of this invention is to provide a method for manufacturing a magnetic core that can be manufactured using the following methods.

In the present invention, core pieces of the same shape are provided with a convex portion on one side of the VC and a concave portion on the other side at symmetrical positions on both left and right sides at L5 with respect to a line perpendicular to the abutment surface of the core as the cable trunk. Naru/i@
Punch out the core pieces from the roots and double-lay the punched core pieces to create two sets of core blocks with the same shape. Collision 1. 1. Fit the protrusions and four parts of one block to the four parts and protrusions of the other block. So, the two iron core blocks were arranged in the same direction.

Referring now to the drawings (-, the present invention will be described in detail.

Figures 1 to 6 show an example of manufacturing a discharge lamp ballast by the method of Mizumoto 81J. M perpendicular to the abutment surface (7) of the iron core from the steel plate (6) as shown in Figure 3.
A groove (8) into which the winding is inserted at a symmetrical position centering on (! -Y'), a convex part (91) on one side, and this convex part (917, □"-61" on the other side), Punch out the core piece by 5., 7°, and 11).The punched iron core piece is shown in Figure 4.

However, at this time, a wedge-shaped tongue piece 02+ is provided at the end of the abutment surface (7) and the opposite side (1+1) is provided, and Kosai 1 is bent. Iron core piece (11
By hooking σ1 onto this tongue piece Q2+ and stacking them, it is possible to stack many σ1 core pieces in an orderly manner.

Next, the required number of core pieces (111) punched out in this way are stacked to create two core blocks 03 and (141) of the same shape, and after inserting the winding (1) into one block, ′
i1, reverse the left and right sides of the other block and abut them, and as shown in FIGS. 5 and 6, both blocks have protrusions +91
f Recessed part of block (+d ItC@join to complete 's' ballast.

In this way, by using one punching die, it is possible to make an electric or magnetic core in which the convex portion and the four portions are completely fitted together by tying together the core pieces having the same shape. The shapes of the first convex portion (91) and the concave portion 00 are designed to be freely shaped so that they can fit together easily.

In addition, in ballasts, it is common to provide a gap 0θ in the central leg of the iron core, but the convex part 19+ and the concave part (+(j
by fully mating.

Even in mass production, it is possible to make the interval of the gap α9 uniform throughout, and to maintain the ballast's characteristic characteristics with uniform temperature and temperature.
? It can be made into something.

Note that the convex part (91) and the concave part (1 (mark 1' 7) provided on the iron core
As shown in the figure, the inside of the groove (8) into which the winding is inserted (Ill
K may be provided (or also inside and outside the groove (8) [111
It may be provided in both.

FIG. 8 is an embodiment of the present invention in which Mizumoto IJI is used to manufacture the core of a transformer. The figure (a) shows L-shaped core 0.
(This is an example in which a convex part (171 and a concave part θ8) are provided on the abutting surface of 11 is punched out, and this is the same as the above-mentioned embodiment and the PI rod, but one side is turned upside down and abutted against the other iron core. Also, the same figure (b) shows the U-shaped core Q!I K convex part (a) and concave part 12
This is an example of combining iron cores of the same shape provided with 1).

As described above, it is possible to create an electromagnetic core in which the convex portion and the concave portion are completely fitted at the abutting portion by stacking the same-shaped core pieces made with one water source and one punching die. Therefore, only one punching die is required. Precision is not required for manufacturing the moon shape, and the core piece to be punched is also one rod type, so it is suitable for various areas, is inexpensive, and has uniform electrical characteristics. It is possible to make a ballast or a small transformer.

Fig. 1 is a cross-sectional view of an example of a conventional ballast for a discharge lamp, and Fig. 2 (a) and (b) show a conventional iron core manufacturing method.
Jl-4-ru diagram, Figures 5 and 6 are
Figure 3 is a plan view showing the process, and Figure 4 is a diagram illustrating the manufacturing method of core pieces from the cable trunk.
Figure 5 is a perspective view of the assembled core pieces; Figure 6 is a perspective view of the completed ballast;
FIG. 7 is a plan view of another embodiment of the iron core piece according to the present invention;
Figures (a) and (+) are plan views of the transformer core made by Mizumoto 811, respectively.

(1)... Winding wire, 16)... Steel plate, (7)...
・Abutment surface.

(8' ・= N?, +9', (171, (J to - convex part, OrJ, 08. (zIJ - HFflI, (
11)...Iron core piece, 02I...tongue piece, 04)
・−・Iron core block, θ9・−・Gap.

Name of agent: Patent attorney Etsuji Yoshizaki Deception 1 diagram (G”) (b) = 372 Third mouth 1y・ x4 diagram 2 ! Figure 5 10 Atsushi 6 diagram Figure 117 8th cause

Claims (1)

[Claims] In the manufacture of N magnetic cores, which consist of two silk cores abutted against each other to form a closed magnetic circuit, convexities are formed on one abutment surface at symmetrical positions on both sides of the steel plate, centering on a line perpendicular to the abutment surface. forming part 1
．． Four parts are formed on the other abutting surface, and the core piece is punched out. Several screws fF7 layer 1, 1 Make the first and second 2 silk core blocks hx L, and scrape the convex and concave portions of the second core block into the concave and convex portions of the first core block. tq 17+; 1-1 1g electromagnetic core manufacturing method, characterized in that: E2, the second core block is butted against the first core block; [7] the magnetic core is created;