JPH0447504A - Laminate type magnetic head core - Google Patents

Abstract

PURPOSE:To easily laminate and unify two or more kinds of core pieces with different plate thickness, shape, or quality by fixing a substrate with the same coupling means as a coupling projection to fix the core pieces at both sides of the core pieces. CONSTITUTION:A laminate core 1 consists of, for example, a sheet of substrate A of upper layer, five sheets of core pieces B of intermediate layer, and a sheet of substrate C of lower layer, and for example, the substrates A, C are comprised of a nonmagnetic body made of stainless steel, and the core piece B of a ferromagnetic material made of 'Permalloy(R)', and the substrate C is blanked in a die first, and a through hole H is formed at the coupling part of them. The coupling projection K facing downward is formed on the part in either the core piece B or the substrate A, and is indented with the projection K of the substrate C blanked first or the core piece B, and is calking-coupled. Thereby, it is possible to fix integrally the two or more kinds of core pieces B with different plate thickness, shape, and quality on the substrate A in the same metallic mold by using the same coupling means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention particularly relates to a laminated magnetic head core of a type in which a substrate is combined with core pieces made of different plate thicknesses, irregular shapes, and different materials.

[Prior Art] Conventionally, a laminated core for a magnetic head or the like is constructed by fixing a substrate made of a non-magnetic insulating material to both sides of a laminated core piece made of a magnetic material with high magnetic permeability. be. In addition, in this case, when manufacturing a laminated core that combines two or more types of core pieces with different plate thicknesses, shapes, or materials, the core pieces manufactured using separate press molds are stacked and integrated by adhesive. However, the assembly is mainly done manually.

[Problems to be Solved by the Invention] In such a product structure, as described above, it is necessary to integrate the core pieces and the substrate by bonding or welding, or
After only the core piece is fixed by the coupling protrusion, assembly such as gluing or welding the substrate to both sides of the core piece requires manpower, and the cost is also high.

In addition, if only part of the board or core piece has the same shape,
For example, JP-A-64-52206, JP-A-64-55711
As disclosed in the above publication, there is a method of integrating a large number of thin plate core pieces using a coupling protrusion. however,
As mentioned above, there is no known device in which core pieces having different plate thicknesses, shapes, or materials are laminated and fixed by a connecting protrusion.

An object of the present invention is to provide a laminated magnetic rad core in which two or more types of core pieces having different plate thicknesses, shapes, or materials can be easily laminated and integrated.

[Means for Solving the Problem] In order to achieve the above-mentioned object, in the laminated magnetic helad core according to the present invention, a predetermined number of core pieces made of a high magnetic permeability material are laminated and fixed via coupling protrusions, and , characterized in that a substrate made of a non-magnetic material having a different plate thickness or shape from the core piece is fixed to both sides of the core piece by a coupling means similar to the coupling protrusion that fixes the core pieces to each other. It is.

[Function] The laminated magnetic helad core having the above-mentioned configuration includes two or more types of substrates with different plate thicknesses, shapes, or materials, and a plurality of hoop materials for punching core pieces, each of which is timed by the feed pitch. The substrates and core pieces are intermittently fed and punched into their respective shapes in a punching die, and the punched substrates and core pieces are sequentially mixed and laminated in the gou part, fixed by a coupling means, and taken out.

[Example] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows an example of a laminated core 1 for a magnetic head according to the present invention. For example, the substrates A and C are made of a non-magnetic material made of stainless steel, and the core piece B is made of a ferromagnetic material made of permalloy. The board thicknesses of these boards A, C, and core piece B are, for example, 0.
15mm, core piece B is 0.2mm, board C is 0625m
m. Figure 2 fal fbl (c
) show a plan view, a front view, and a bottom view of the laminated core 1, respectively.

Further, FIG. 3 shows a laminated core 1° that is a pair with the laminated core 1 shown in FIG. 1, and its configuration is symmetrical with that of FIG. 1. FIGS. 4(a), 4(b), and 4(c) respectively show a plan view, a front view, and a bottom view of the laminated core l°.

The laminated core 1 as shown in FIGS. 1 to 4 is fixed together by a coupling protrusion that is a caulking protrusion, and the state of this integration will be explained with reference to FIG. 5. This laminated core 1
The substrate C is located at the bottom, and this substrate C is pulled out into the die first, and a through hole H is formed in the joint portion thereof.

On top of that, a plurality of core pieces B are stacked, each of which has a connecting protrusion K facing downward, and is pushed into the protrusion K of the board C or core piece B that was pulled out first. It is caulked and connected. Further, a protrusion K similar to that of the core piece B is formed on the substrate A as well, and is integrally caulked to the core piece B. In this way, the product is manufactured, and the laminated core 1.
At 1°, they form a pair, so if one mold is used to manufacture the other, the through hole H1 will be formed on the substrate A side, and the protrusion K will be formed on the substrate C side.

To explain the manufacturing method of the laminated core 1 shown in FIG. 1, FIG. 6 shows an example of the layout of the processing method using the upper and lower punching dies illustrated in FIG. 7. In Figure 6,
Long hoop materials A, B' and C' for making substrates A, C and core piece B shown in Fig. 1 are arranged in parallel and fed in the direction of arrow X. A.

B'C' is intermittently fed by a predetermined amount with a tensile force applied from the tip side.

The manufacturing process in this case is (1) side cut, (
2) Pilot punching, (3) Notch punching, (4) Notch punching, (5) Through hole punching, (6) Connection protrusion formation, (7)
It consists of 7 steps including punching out the outer shape and lamination by caulking.

In the side cutting process of fil, each hoop material A' B
'C' is individually fed in synchronization with the vertical movement of the press ram, and the side portions are intermittently cut by the side cut portion 11 by the feed amount. A stopper section is provided on the lower die side, and each hoop material A'B'C' is fed by the amount punched in this step and stopped at the stopper section.

(2) In the pilot punching process, each hoop material A'
A pilot hole 12 is punched at a predetermined position of B'C' for positioning in subsequent steps.

In the notch punching steps I and (3) of (3) and (4), notches 13 and 14 of the respective external shapes are punched out for each hoop material A'B'C'.

In the through-hole punching step (5), hoop material A is used.

Small-diameter through-holes H are formed by punching at three predetermined positions on the first thin plate constituting the substrate A%C made of Co.

In the bonding protrusion forming step (6), the second and subsequent substrates A,
C, connecting protrusion K at the same position as the first through hole H of core piece B
form.

(7) In the outline punching and caulking lamination process, the substrates A, C
, the entire outer shape of the core piece B is removed, and the core pieces that overlap each other in the die of the lower mold are caulked and laminated by the joining projections K.

As shown in FIG. 7, the mold consists of an upper mold 21 and a lower mold 22.
The substrates A, C, and core piece B are punched out by the outline punch 23 provided separately for each of the substrates A, C, and core piece B.
Four dies D1 of the lower die 21 formed on one rotary die device. It is configured to be drawn into D2, D3, and D4 in sequence. This rotary die device is rotated by 90 degrees by a drive device 24 such as a step motor, and by controlling this rotation, the punched substrate A,
C, the core piece B is removed after being assembled in each die DI-D4. Therefore, when one predetermined cycle is completed,
Four sets of laminated cores 1 will be assembled.

In Fig. 7, numeral 25 is a tensile force applying device for applying a tensile force in the feed direction to each hoop material A, B' and C'. hoop material A'B'C'
I am trying to move forward. A progressive punching die is used for this die, and PL, P2, P3,...
, P6 indicates the punch used in each process.

FIG. 8 illustrates the relationship between the punching timing and the feeding timing of the hoop materials A'B'C' in the outline punching and caulking lamination process (7) using the mold shown in FIG. 7. The operation will be explained below using this time chart.

The rotary die device rotates in synchronization with the vertical movement of the press ram, so each time the upper die 21 moves up and down once and performs punching,
Rotate clockwise by 0 degrees as shown in FIG. This is hoop material A.

To explain the relationship with the feeding of B' and C', first, only the hoop material A' is fed and punched four times. Therefore, the four dies Di, D2, D3, D of the rotary gouging device
Next, the hoop material B° is stroked 4X5=20 times so that five core pieces B are pulled out into each die DI-04 and stacked. However, the punching of this core piece B may be started from the time of punching the second board A in synchronization with the timing of punching the board A. Then, at the same time as punching out the 188th core piece B, punching of the substrate C is started, and one cycle ends when four substrates C are punched out. The substrates A-C punched out in this manner are stacked in each die Di-D4 while being crimped while being pushed into the coupling protrusion, and when a predetermined number of substrates are stacked and integrated, the die Di-04
It falls from the mold and is carried out of the mold. Then, in the next cycle, punching of the substrate A is started again from the time when three substrates C have been punched out.

[Effects of the Invention] As explained above, the laminated magnetic helad core according to the present invention allows the core pieces and the substrate, which are different in plate thickness, shape, or material, to be integrated in the same mold using the same coupling means. Since it is fixed, it can be assembled at low cost and without any human effort. In addition, since two or more types of core pieces with different plate thicknesses, shapes, or materials are punched out in a predetermined order in the die part and laminated and integrated, they are taken out from the gouge part (11 Conventionally, each core piece is Instead of the pieces being made in separate molds and then assembled into one piece, the core pieces are punched out and integrated into the same goo, making mass production possible and greatly improving productivity.

(2) Conventionally, it was necessary to manage parts for each core piece, but since it can be manufactured within the Gui department, product management is significantly easier. (3) After assembly as a product, after annealing, etc. Since it can be treated, it has the advantage of not deteriorating the feel of the entire laminated core.

[Brief explanation of drawings]

The drawings show an embodiment of the laminated magnetic helad core according to the present invention, FIG. 1 is a perspective view of the laminated core, FIG. 2 (at is a plan view of the laminated core, (b) is a front view, and (c) is a The bottom view, Figure 3 is a perspective view of the laminated core that is paired with the laminated core in Figure 1, and Figure 4 is a bottom view.
Figure (a) is a plan view of the laminated core, (b3 is a front view, (c)
5 is a bottom view, FIG. 5 is an explanatory diagram of a laminated state, FIG. 6 is a layout diagram of a manufacturing method, FIG. 7 is a front view with a part of the mold device cut away, and FIG. 8 is a time chart diagram. 1 is a laminated core, 21 is an upper mold, 22 is a lower mold, 23 is an outline punch, 24 is a drive device, 25 is a tensile force applying device, A and C are substrates, B is a core piece, K is a coupling protrusion, H is a through hole, D is a rotary gouging device, and Dl to D4 are gougs.

Claims (1)

[Scope of Claims] 1. A predetermined number of core pieces made of a high magnetic permeability material are laminated and fixed via coupling protrusions, and a substrate made of a non-magnetic material having a different plate thickness or shape from the core pieces is attached to the core piece. A laminated magnetic head core characterized in that the core piece is fixed to both sides of the core piece by means of coupling means similar to coupling protrusions for fixing the core pieces. 2. One of the substrates is provided with a through hole into which the coupling protrusion of the core piece fits, and the fixing coupling means of the other substrate is formed with a coupling protrusion similar to the core piece. 1. The laminated magnetic head core according to 1.