JP2000331822A - Manufacture of magnetic block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join a pair of bilateral magnetic members together firmly and strongly to form a magnetic block and to improve the magnetic block in yield. SOLUTION: This manufacturing method is carried out through a manner where a pair of bilateral magnetic members 1 are arranged at a certain interval. Molten non-magnetic material 9 is poured into a gap 8 demarcated with the opposed surfaces 1b of the magnetic members 1 using the magnetic members 1 as a part of a casting mold. After the non-magnetic material 9 is hardened, through-holes 10 are bored in the magnetic members 1 penetrating their outer surfaces through the intermediary of the non-magnetic material 9. A non- magnetic metal bar 11 is inserted into each of the through-holes 10. The ends of the metal bar 11 are caulked to join the bilateral magnetic members 1 together through the intermediary of the non-magnetic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnetic block, and more particularly to a method for manufacturing a magnetic block suitable for a magnet base by incorporating a casting method in some steps. It is about.

[0002]

2. Description of the Related Art Conventionally, as a manufacturing method of this type, for example, a hole is formed in a pair of left and right magnetic pole members facing each other, and this magnetic pole member is used as a part of a mold, and a nonmagnetic member is formed between the facing surfaces. There is a method for manufacturing a magnetic pole body in which a magnetic pole member is connected by pouring and sandwiching a non-magnetic member.
-29206).

[0003]

In this type of manufacturing method, the magnetic block to be manufactured is usually used as a component of a magnet base. It is desirable that the magnetic pole members can be connected firmly and firmly.

However, in the conventional method, a hole is formed in the opposite surface of the magnetic pole member, a nonmagnetic member is cut into the hole, and a pair of left and right magnetic pole members are connected to manufacture a magnetic block. In the case of the magnetic block manufactured in the above, it was inevitable that the connection strength was weakened.

[0005] Further, since the non-magnetic member is usually made of brittle aluminum or resin material, according to the conventional method, the non-magnetic member is easily broken from the portion of the non-magnetic member cut into the above-mentioned hole, and as a result, the production yield is reduced. There was a problem that it became worse.

The present invention has been proposed in view of such conventional problems. Therefore, a technical problem of the present invention is to provide a method of manufacturing a magnetic block in which a pair of left and right magnetic members (magnetic pole members) can be firmly and firmly connected to each other to improve the yield.

[0007]

The present invention employs the following technical means in order to solve the above-mentioned problems.

That is, in the manufacturing method of the present invention, as shown in FIGS. 1 and 2, a pair of left and right magnetic members 1 are arranged at a fixed interval, and this magnetic member 1 is used as a part of a mold. A molten non-magnetic material 9 is poured into a gap 8 formed by the facing surface 1b of the magnetic member 1, and after the non-magnetic material 9 is hardened,
A through hole 10 is opened from the outer surface of one magnetic member 1 to the outer surface of the other magnetic member 1 via the non-magnetic material 9, and a metal rod 11 made of a non-magnetic material is inserted into the through hole 10. The invention is characterized in that both ends of a metal rod 11 are swaged and a pair of left and right magnetic members 1 are connected via a non-magnetic material 9 (claim 1).

Here, the term “part of the mold”
This means that the pair of left and right magnetic members 1 constitute a part of a mold for injecting the nonmagnetic material 9. The magnetic member 1 means a member that is magnetized when placed in a magnetic field,
The magnetic member 1 is preferably made of a ferromagnetic material such as iron, nickel, and ferrite.

The non-magnetic material 9 includes a metal material such as aluminum and a synthetic resin material. When the molten non-magnetic material 9 is poured into the gap 8, it is preferable to apply pressure.

In this case, the present invention provides a pair of left and right magnetic members 1.
Are engaged with the peripheral surfaces of the columnar magnets 4 (see FIG. 5) on their opposing surfaces, and form a groove 1a for forming a cylindrical space S for rotatably storing the columnar magnets 4 in the front-rear direction. Preferably, the gap 8 is formed in the vertical direction through the circular cavity S in the front-rear direction of the magnetic member 1 (claim 2).

In this case, the magnetic block 2 for the magnet base 3 (see FIG. 6 and the like) in which the pair of left and right magnetic members 1 are firmly and firmly connected can be manufactured with high yield.

According to the present invention, when the magnetic block 2 for the magnet base 3 is manufactured, as shown in FIGS. 7 and 8, a non-magnetic material 9 for closing one open surface S1 of the circular cavity S is used. One end face of the pair of left and right magnetic members 1 is wrapped around from the gap 8, and together with the gap 8, one opening face S 1 of the circular cavity S is formed.
Is preferably formed in a magnetically insulating state (claim 3).

In this case, since the gap 8 and one opening surface S1 of the circular cavity S can be magnetically insulated at once with the non-magnetic material 9,
The magnetic block 2 can be efficiently manufactured in a short time as compared with the case where the magnetic blocks 2 are individually formed.

In the present invention, it is preferable that the non-magnetic material 9 to be poured into the gap 8 is different from the non-magnetic material of the metal rod 11 (claim 4).

In this case, it is possible to provide the magnetic block 2 having optimum specifications according to various conditions such as cost and use. The difference between the non-magnetic material 9 and the non-magnetic material of the metal rod 11 is as follows.
Specifically, for example, the non-magnetic material 9 is formed of a resin material, and the metal rod 11 is formed of a non-magnetic metal material such as aluminum. It is achieved by forming.

Further, in the present invention, it is preferable to enlarge the diameter of both ends 10a of the through hole 10 and to caulk both ends of the metal rod 11 into the both ends 10a (claim 5).

In this case, since both ends of the metal bar 11 can be prevented from being exposed to the outer surface of the magnetic member 1, not only the appearance is improved, but also the step at the swaged portion can be eliminated, and the magnet base 3 can be manufactured. In this case, the magnetic block 2 whose outer surface can be easily processed can be manufactured.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

According to the method of the present invention, as shown in FIGS. 1 and 2, first, a pair of left and right magnetic members 1 made of, for example, iron are arranged at regular intervals. In the case of this embodiment, the magnetic block 2 to be manufactured is used by being incorporated into a magnet base 3 (see FIGS. 4 to 6).

The magnet base 3 includes a magnetic block 2 manufactured by the method of the present invention, a cylindrical magnet 4 rotatably housed in a cylindrical space S (see FIG. 1 and the like), and a magnet 4 for rotating the magnet 4. A handle 5 and a plate 6 for holding the handle 5 rotatably.
The lower surface of the magnetic block 2 is formed so as to be switched to an excited state or a demagnetized state by the rotation operation of. As shown in FIG. 6, the magnet base 3 has a column 7 for holding a measuring instrument and the like standing upright, and is used by being attracted to a magnetic surface around a metal working machine or the like.

The magnetic block 2 manufactured by the method of the present invention comprises:
Since the magnetic member 1 is used for the magnet base 3 as described above, the pair of left and right magnetic members 1 are engaged with the peripheral surface of the cylindrical magnet 4 on their opposing surfaces as shown in FIG. 4 is provided with a groove 1a for forming a circular cavity S for rotatably accommodating the groove 4 at a symmetrical position in the front-rear direction. Therefore, in the case of this embodiment, the above-mentioned fixed interval means a distance at which the circular space S can be formed on the mutually facing surfaces of the magnetic members 1.

Next, in the present invention, the magnetic member 1 is used as a part of a mold, and a molten non-magnetic material 9 is poured into a gap 8 formed by the opposing surface 1b of the magnetic member 1. Specifically, a core functioning as a part of a mold is cut into a cavity S formed by a pair of right and left magnetic members 1 to cut off a communication state between the cavity S and the gap 8 and to enter a space around the gap 8. Is filled with a mold material, and a molten metal as the non-magnetic material 9, for example, an aluminum alloy is poured. In the case of the present embodiment, the gap 8 is
Are formed over the magnetic member 1 in the front-rear direction at the upper and lower positions.

Next, according to the present invention, after the non-magnetic material 9 is cured, a through hole 10 is formed from the outer surface of the one magnetic member 1 to the outer surface of the other magnetic member 1 via the non-magnetic material 9, for example, a drilling machine. Open with etc. Next, in this embodiment, both ends 10a of the through-hole 10 are lowered, and the diameter of both ends 10a is enlarged.

Then, a metal bar 11 made of a nonmagnetic material made of, for example, an aluminum alloy is inserted into the through hole 10,
The two ends of the metal bar 11 are swaged to form a pair of left and right magnetic members 1.
Are connected via a non-magnetic material 9. In the case of this embodiment, since the diameter of both ends 10a of the through hole 10 is enlarged, both ends of the metal rod 11 are crimped into the both ends 10a. In this embodiment, the metal rod 11 and the non-magnetic material 9 are formed with different component ratios.

As described above, the magnetic block 2 manufactured by the method of the present invention has a cavity S for accommodating the columnar magnet 4 and is used as a member for forming the magnet base 3. It is. However, the method of the present invention is not limited to the case where the magnetic block 2 for this kind of application is manufactured.

[0027]

As described above, the present invention uses a pair of left and right magnetic members as a part of a mold to perform magnetic insulation by casting, and after the non-magnetic material is hardened, the outer surface of one of the magnetic members is used. A non-magnetic material is used to open a through-hole in the outer surface of the other magnetic member, a metal rod made of a non-magnetic material is inserted into the through-hole, and both ends of the metal rod are swaged, and a pair of right and left magnetic members The connection is made via a non-magnetic material.

Therefore, according to the present invention, a pair of left and right magnetic members are used as a part of a mold and magnetically insulated by a casting method, so that the magnetic insulating operation can be simplified and speeded up.

In the method of the present invention, as described above, a metal bar is passed through a pair of left and right magnetic members, and both ends thereof are caulked and connected. Therefore, according to this, compared to the conventional method of connecting only with a non-magnetic material, there is an excellent effect that the pair of left and right magnetic members can be connected firmly and firmly, and the yield of the magnetic block can be improved in manufacturing.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic block manufactured according to the present invention.

FIG. 2 is a flowchart showing the steps of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view of a magnet base in which a magnetic block is incorporated.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a front view of a main part of a magnet base.

FIG. 7 is a rear view of the magnetic block whose back surface is covered with a non-magnetic material.

8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 A pair of right and left magnetic members 1b Opposed surface 8 Gap 9 Non-magnetic material 10 Through hole 11 Metal rod

Claims (5)

[Claims] 1. A pair of left and right magnetic members are arranged at regular intervals, and this magnetic member is used as a part of a mold, and a molten non-magnetic material is poured into a gap formed by opposing surfaces of the magnetic member. After the non-magnetic material is cured, a through hole is opened from the outer surface of one magnetic member to the outer surface of the other magnetic member via the non-magnetic material, and a metal rod made of a non-magnetic material is inserted into the through hole. A method of manufacturing a magnetic block, comprising crimping both ends of a metal bar and connecting a pair of left and right magnetic members via a non-magnetic material. 2. The method of manufacturing a magnetic block according to claim 1, wherein a pair of left and right magnetic members engage with the peripheral surface of the cylindrical magnet on opposing surfaces of each other, and rotatably house the cylindrical magnet. A groove for forming a circular cavity for forming the magnetic block, the gap being formed in the vertical direction through the circular cavity in the longitudinal direction of the magnetic member. Manufacturing method. 3. The method of manufacturing a magnetic block according to claim 2, wherein a non-magnetic material is wrapped around the gap into one end face of the pair of left and right magnetic members to close one opening surface of the circular cavity. A method of manufacturing a magnetic block, characterized in that one opening surface of a circular cavity is formed in a magnetic insulating shape together with the above. 4. The method for manufacturing a magnetic block according to claim 1, wherein a non-magnetic material poured into the gap and a non-magnetic material of a metal rod are different. Manufacturing method. 5. The method for manufacturing a magnetic block according to claim 1, wherein the diameter of both ends of the through hole is enlarged, and both ends of the metal bar are caulked at the both ends. A method for manufacturing a magnetic block, comprising: