JPH1177336A - Manufacturing method of inlay type clad material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inlay-type clad material for a yoke or an armature of a small relay at a low cost, which can obtain predetermined magnetic characteristics even when magnetic materials having different magnetic characteristics are used as a base metal. SOLUTION: A plurality of types of overlay type cladding inlay tapes 5a, 5b or 5c in which predetermined grooves 2 are formed in a base metal 1 made of a magnetic material and the thickness ratio of the magnetic material and the non-magnetic material is changed. Is prepared according to the magnetic characteristics of the base metal 1, fitted into the groove 2 and joined by rolling and pressure bonding to obtain an inlay clad material 7 having predetermined magnetic characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an inlay clad material comprising a magnetic material and a non-magnetic material used for an armature or a yoke for a small relay.

[0002]

2. Description of the Related Art An inlay clad material is formed by forming a groove of a desired depth in a material to be a base metal, preparing an inlay tape suitable for the shape of the groove, fitting the tape into the groove, and cooling the tape. It is manufactured by a method of joining by hot rolling and pressure bonding. In order to accurately form the thickness of the inlay tape bonding portion of the inlay type clad material, a method of forming a groove of a base metal by a plastic working method is more suitable than a cutting method. As a plastic working method, a flat strip of a base metal is arranged on a plate surface of a plate-shaped die having an acute end, and a rolling roll is rolled and pressed in a range corresponding to the plate surface. (See Japanese Patent Publication No. 52-36512). Each time the pressing rolling is completed, the base metal is transported backward from the tip of the flat die to a predetermined length.

[0003]

Conventionally, when an inlay type clad material composed of a magnetic material a and a non-magnetic material b is used for an armature or yoke for a small relay as shown in FIG. Since the thickness of the non-magnetic material b is selected according to the magnetic properties of the magnetic material a in order to adjust the attraction force to a predetermined value, several types of clad materials having different thicknesses of the non-magnetic material b are prepared for one product. Need to
Therefore, it is necessary to prepare several types of flat dies for forming the groove of the magnetic material a, which increases the cost. In reality, for this purpose, a magnetic material a is press-formed as shown in FIG. 6 without using a clad material, and a non-magnetic material b selected according to its magnetic properties is spot-welded by a method such as spot welding. The parts were being manufactured.

[0004] It is an object of the present invention to provide an inlay clad material which can obtain predetermined magnetic characteristics even when magnetic materials having different magnetic characteristics are used as a base metal, at low cost.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a predetermined groove is formed in a base metal made of a magnetic material, and the thickness ratio of the magnetic material and the non-magnetic material is changed. A plurality of types of overlay type clad material inlay tapes were prepared, selected according to the magnetic properties of the base metal, fitted into the grooves and joined by rolling and pressing to obtain predetermined magnetic properties. Features.

According to the above configuration, the inlay-type clad material having stable magnetic properties can be manufactured at a low cost because it is not necessary to prepare a plurality of expensive flat plate dies and only one die is required. .

[0007]

Embodiments of the present invention will be described with reference to the drawings.

The base metal 1 shown in FIG.
A 1.0 mm thick strip made of, for example, pure iron.
For example, a groove 2 having a width of 5.0 mm and a depth of 0.2 mm is formed by the plastic working method or the cutting method as described above.

Further, as shown in FIG. 2, an overlay clad material composed of pure iron 3 and pure copper 4 having a width of 5.0 mm and a thickness of 0.2 mm is used.
Three types of overlay type cladding materials 5a, 5b and 5c for inlays prepared as 1, 2, 1 and 3: 1 are prepared.

Next, the magnetic properties of the base metal 1 are measured, and the base metal 1 is selected from three types of overlay type clad materials 5a, 5b and 5c according to the magnetic properties.

As shown in FIG. 3, a grooved base metal 1 and selected overlay-type cladding materials 5a, 5a,
The inlay clad material 7 is manufactured by superimposing b or 5c and joining them together by rollers 6 and 6 by a cold rolling compression bonding method.

In the method of manufacturing the inlay clad material 7, one groove 2 is formed in the center of the base metal 1, but a plurality of grooves 2 are formed in parallel, and the grooved base metal and a plurality of inlays are formed. The overlay type clad material may be overlapped and joined together as described above, or one may be formed so as to be biased to one side and continue to one side surface,
The grooved base metal and the overlay type clad material for inlay may be overlapped and joined as described above.

FIG. 4 shows a yoke 8 for a small-sized relay manufactured by the manufacturing method according to the present invention. The yoke 8 is formed by punching the inlay clad material 7 shown in FIG. It manufactures by doing. The overlay type clad material (5a, 5b or 5) of the yoke 8 is used.
c) The joint is disposed to face the suction part of the armature. The small relay using the yoke 8 manufactured in this way can always obtain stable magnetic characteristics, that is, magnetic attraction even if the magnetic characteristics of the magnetic material of the base metal 1 are different.

In place of the pure iron 3 and the pure copper 4 in the above embodiment, other known magnetic materials and non-magnetic materials can be used, and three kinds of overlay type clad materials 5a,
Instead of 5b and 5c, more or fewer cladding materials may be provided. Further, the present invention can be applied to an armature or the like instead of the yoke 8. Also in this case, the joint portion of the overlay type clad material (5a, 5b or 5c) of the armature is arranged opposite to the yoke as a suction portion.

[0015]

The present invention has the effect that an inlay clad material made of a magnetic material and a non-magnetic material and having stable magnetic properties can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is a front view of a base metal used in a method for manufacturing an inlay clad material according to the present invention.

2 (A), 2 (B) and 2 (C) are front views of three types of overlay type clad material inlay tapes used in the method for producing an inlay type clad material according to the present invention.

FIG. 3 is a perspective view for explaining a method of manufacturing an inlay clad material according to the present invention.

FIG. 4 is a perspective view of a yoke for a small relay manufactured by the method for manufacturing an inlay clad material of the present invention.

FIG. 5 is a perspective view of a small-sized relay yoke manufactured by a conventional method of manufacturing an inlay clad material.

FIG. 6 is a perspective view of a small-sized relay yoke manufactured by another conventional method for manufacturing an inlay clad material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base metal 2 ... Groove 3 ... Pure iron 4 ... Pure copper 5a, 5b, 5c ... Overlay type clad material inlay tape 6 ... Roller 7 ... Inlay type clad material 8 ... Small relay yoke

Claims (1)

[Claims] An inlay tape of a plurality of types of overlay-type clad materials having predetermined grooves formed in a base metal made of a magnetic material and having different thickness ratios of a magnetic material and a non-magnetic material is prepared. A method for producing an inlay clad material, wherein the clad material is selected according to the magnetic characteristics of the base metal, fitted into the groove, and joined by rolling and pressure bonding to obtain predetermined magnetic characteristics.