JPH08107033A - Work fixing jig and method for polishing work using that jig - Google Patents

Abstract

PURPOSE: To provide a work fixing jig which increases an yield of polishing end faces of a core which will become junction faces and which makes it possible to obtain the end faces which are polished at high accuracy and also provide a method for polishing a work using that jig. CONSTITUTION: A work fixing jig 10 has a base plate 12, on which four screw holes 14 are formed. On the base plate 12, a presser plate 16 is located which has three through holes 18 to pass a ferrite core 1 through. On one side of the presser plate 16, a work fixing screw 20 is placed. The work fixing screw 20 is screwed into a screw hole 22 from the side face of the presser plate 16 and an end of the work fixing screw 20 abuts against one principle face of the ferrite core 1 to secure the ferrite core 1. And, the presser plate 16 is provided with four screw holes 24 to correspond with the screw holes 14. Male screws 26 are placed in the four screw holes 24 and these four male screws 26 are screwed into the screw holes 24 and the screw holes 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work fixing jig and a work polishing method using the same, and in particular, for example,
The present invention relates to a work fixing jig for fixing a work when polishing an end surface that is a joint surface of a core used in a choke coil, a transformer, and the like, and a work polishing method using the same.

[0002]

2. Description of the Related Art FIG. 6 is an illustrative view showing an example of a conventional work polishing method which is the background of the present invention. E shown in FIG.
The mold ferrite core 1 is used in abutment with another ferrite core (not shown). in this case,
If a gap is formed between the one end surface 1a that is the joint surface of the two butted ferrite cores 1, the magnetic resistance increases and the characteristics deteriorate. Therefore, the one end surface 1a of the ferrite core must be polished so that no gap is created. Therefore, conventionally, as shown in FIG.
A method is often used in which the ferrite core 1 is fixed to the plate-shaped jig 2 with the adhesive 3 and then polished. When polishing, for example, lapping, polishing,
And a process such as surface grinding is used. In addition, wax may be used as the adhesive 3.

[0003]

However, in the conventional work polishing method, the ferrite core 1 as a work is used.
Since it is fixed to the jig 2 with the adhesive 3, a heating and cooling step is required, and the productivity is poor. Further, the workability of attaching and detaching the work to and from the jig 2 is poor, and the number of steps increases. Furthermore, an excessive washing process for dropping the adhesive 3 after polishing is necessary. In addition, when fixing with the adhesive 3, the adhesive 3
There is a case that the ferrite core 1 is deformed due to the hardening shrinkage and the flatness of the polished one end face 1a is deteriorated. Further, as shown in FIG. 7, when the other end surface 1b serving as the back surface of the ferrite core 1 has a warp or the like, it is fixed and polished as shown in FIG. The ferrite core 1 warps again into the state shown in FIG. 7. Therefore, the one end surface 1a having the desired flatness cannot be obtained. On the other hand, it is effective to polish the other end surface 1b of the ferrite core 1 in advance and then polish the one end surface 1a, but the fixing with the adhesive 3 has the above-mentioned problem. As described above, when the flatness of the one end surface 1a of the ferrite core 1 is poor, when the two ferrite cores 1 are abutted with each other, a gap is generated between the one end surface 1a serving as the bonding surface, and a desired characteristic is obtained. Can't get

Therefore, the main object of the present invention is to improve the productivity when polishing the end surface to be the joint surface of the core and to obtain a work fixing jig capable of obtaining a highly accurate polished end surface. It is to provide a work polishing method using the same.

[0005]

According to a first aspect of the present invention, there is provided a work fixing jig having a flat plate-shaped base plate on which at least one end face is to be ground and a work fixed on the base plate. It is a work fixing jig including a flat plate-shaped pressing plate having a through hole for inserting one end face thereof, and a fixing means for fixing a work in the through hole.

According to a second aspect of the present invention, there is provided a method for polishing a work using the work fixing jig according to the first aspect, wherein one end surface of the work is inserted into a through hole of the pressing plate to fix the work. A step of fixing to the through hole by a fixing means,
A method for polishing a work, comprising: a step of abutting the other end surface of the work opposite to the one end surface thereof to a main surface of the base plate to fix the pressing plate to the base plate; and a step of polishing the one end surface of the work. .

According to a third aspect of the present invention, there is provided a work polishing method using the work fixing jig according to the first aspect, wherein one end face of the work is inserted into the through hole of the pressing plate to fix the work. A step of fixing to the through hole by a fixing means,
Touch one end surface of the work to one main surface of the base plate,
The step of fixing the pressing plate to the base plate, the step of polishing the other end surface facing the one end surface of the work, the step of removing the pressing plate from the base plate together with the work, and the other polished end surface of the work on one side of the base plate. It is a work polishing method including a step of abutting on a main surface and fixing a pressing plate to a base plate, and a step of polishing one end surface of the work.

[0008]

In the work fixing jig according to the first aspect, the work is supported by the base plate and the pressing plate. By inserting one end surface of the work into the through hole of the pressing plate, the one end surface of the work is projected from one side in the thickness direction of the base plate to the other side. Further, the work is fixed to the through hole of the pressing plate by the fixing means. The pressing plate is fixed to the base plate by bringing the end surface of the work, which is opposite to the end surface to be polished, into contact with the base plate. In this way, the work is fixed to the work fixing jig. When polishing both end faces of the work, the work can be easily re-fixed by removing the pressing plate from the base plate, turning it over, and then fixing it again to the base plate.

In the work polishing method according to the second aspect, one end face to be polished is projected from one side in the thickness direction of the pressing plate to the other side by inserting one end face of the work into the through hole of the pressing plate. To be done. Then, the work is fixed to the through hole of the pressing plate by the fixing means. next,
The other end surface of the work, which is opposite to the one end surface, is brought into contact with the one main surface of the base plate, so that the work is placed on the base plate together with the pressing plate. The work is fixed to the work fixing jig by fixing the pressing plate to the base plate. Then, by polishing the one end surface of the work, it is possible to obtain the highly polished one end surface.

In the work polishing method according to the third aspect of the present invention, the one end surface to be polished is projected from one side in the thickness direction of the pressing plate to the other side by inserting one end surface of the work into the through hole of the pressing plate. To be done. Then, the work is fixed to the through hole of the pressing plate by the fixing means. next,
By bringing one end surface of the work into contact with one main surface of the base plate, the work is placed on the base plate together with the pressing plate with the other end surface facing the one end surface facing the side opposite to the base plate. The work is fixed to the work fixing jig by fixing the pressing plate to the base plate. And
The other end surface of the work can be made flat by polishing the other end surface of the work. Next, the pressing plate can be turned upside down together with the work by removing the pressing plate together with the work from the base plate. Then, the other end surface of the work, which has been polished into a planar shape, is brought into contact with one main surface of the base plate, so that the work is placed on the base plate together with the pressing plate. The work is fixed to the work fixing jig again by fixing the pressing plate to the base plate. Next, by polishing one end surface of the work,
It is possible to obtain the highly polished one end surface.

[0011]

According to the work fixing jig and the work polishing method using the same according to the present invention, the work can be mechanically fixed at the time of work polishing, and an adhesive or wax is used. No need. Therefore, steps such as heating and cooling for fixing the work are not required, and productivity is improved. Further, workability of work attachment / detachment work is improved, and work time can be shortened. Furthermore, a cleaning step for removing the adhesive after polishing is unnecessary. Further, unlike the conventional case, since the work is not deformed due to the curing shrinkage of the adhesive, it is possible to obtain a highly accurately polished end surface. Further, even when the work has a warp or the like, first, the other end surface of the work is polished into a flat surface,
By polishing the one end face facing it, the end face polished with high accuracy can be obtained.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0013]

1 is an exploded perspective view showing an embodiment of the present invention. FIG. 2 is a front view solution diagram of the embodiment shown in FIG. FIG. 3 is a schematic side view of the embodiment shown in FIG. First, the ferrite core 1 as a work applied to this embodiment will be described. In this embodiment, a plurality of E-type ferrite cores 1 are prepared by stacking them in the thickness direction. The plurality of ferrite cores 1 overlapped with each other are integrally fixed to the work fixing jig 10 in order to polish one end surface 1a serving as a joint surface and the other end surface 1b serving as a back surface.
Fixed to. In this specification, the joining surface refers to a surface that joins when the two ferrite cores 1 are butted against each other, and the back surface refers to a surface that faces the joining surface in the thickness direction of the ferrite core 1.

The workpiece fixing jig 10 of this embodiment includes a flat base plate 12. One surface of the base plate 12 has a predetermined flatness for mounting the ferrite core 1 to be polished. Screw holes 14 are formed near the four corners of the base plate 12, respectively. A flat pressing plate 16 is arranged on the base plate 12. The pressing plate 16 has
Three elongated through holes 18 for inserting the ferrite core 1 are formed to penetrate the pressing plate 16 in the thickness direction. Further, the ferrite core 1 is provided on the side of the pressing plate 16.
A fixing screw 20 is arranged as a fixing means for fixing the. The screw hole 22 for screwing the fixing screw 20 is
The pressing plate 16 is formed so as to penetrate from one end side surface in the longitudinal direction to the central through hole 18. When the ferrite core 1 is fixed to the work fixing jig 10 of this embodiment, the fixing screw 20 is screwed into the screw hole 22, and the tip of the fixing screw 20 is brought into contact with one main surface of the ferrite core 1. Then, as shown in FIG. 3, by tightening the fixing screw 20, the ferrite core 1 is sandwiched between the tip of the fixing screw 20 and the through hole 18 and fixed in the through hole 18 of the pressing plate 16. It will be.

Further, screw holes 24 penetrating in the thickness direction are formed in the vicinity of the four corners of the pressing plate 16 in correspondence with the screw holes 14. Male screws 26 are arranged in the four screw holes 24, respectively. As shown in FIGS. 2 to 4,
The pressing plate 16 is positioned and fixed to the base plate 12 by overlapping the base plate 12 and the pressing plate 16 and screwing four male screws 26 into the screw holes 24 and the screw holes 14.

Next, a method of polishing a work using the work fixing jig 10 shown in FIG. 1 will be described with reference to FIGS. FIG. 4 is a front view solution diagram showing a fixing state when polishing the one end surface 1a as the bonding surface of the ferrite core 1. First, as shown in FIGS. 2 and 3, the ferrite core 1 is fixed to the work fixing jig 10 with the other end surface 1b to be polished facing upward. That is, first, the one end surface 1 a of the ferrite core 1 is attached to the pressing plate 16
It is inserted into the through hole 18 of the pressing plate 16 so as to project from one side to the other side in the thickness direction. Next, the fixing screw 2
With 0, the ferrite core 1 is fixed to the through hole 18 of the pressing plate 16. The pressing plate 16 and the ferrite core 1 are connected to each other so that the one end surface 1a of the ferrite core 1 contacts the one main surface of the base plate 12.
2 is placed on. Further, the pressing plate 16 and the base plate 1
The ferrite core 1 is fixed to the workpiece fixing jig 10 by fixing 2 and 2 with the male screw 26.

Next, the other end surface 1b of the ferrite core 1 is flatly polished. After that, the ferrite core 1 is removed from the base plate 12 while being fixed to the pressing plate 16. Then, the pressing plate 16 is turned upside down so that the one end surface 1a of the ferrite core 1 is directed upward. Then, the other end surface 1 of the ferrite core 1 which has been polished into a plane shape
b so that it abuts on the base plate 12,
6 and the ferrite core 1 are placed on the base plate 12. Further, by fixing the pressing plate 16 and the base plate 12 with the male screw 26, the ferrite core 1
Are fixed again to the work fixing jig 10 as shown in FIG. Next, the one end surface 1a of the ferrite core 1 is polished. As the polishing method, various methods such as lapping, polishing, and surface grinding can be used.

According to the workpiece fixing jig 10 of this embodiment, the ferrite core 1 can be mechanically fixed at the time of polishing, and there is no need to use an adhesive or wax as in the conventional case. Therefore, steps such as heating and cooling for fixing the ferrite core 1 are unnecessary, and productivity is improved. Further, workability of work attachment / detachment work is improved, and work time can be shortened. Furthermore, a cleaning step for removing the adhesive after polishing is unnecessary. Further, unlike the conventional case, since the ferrite core 1 is not deformed by the curing shrinkage of the adhesive, it is possible to obtain the one end surface which is highly accurately polished. Further, according to this embodiment, even when the ferrite core 1 has a warp or the like, first, the other end surface of the ferrite core 1 is polished into a flat surface, and then the one end surface is polished, so that high precision is achieved. It is possible to obtain the one end surface which is polished to. By using the one end surface 1a thus polished as the joint surface of the ferrite core 1, a gap is not generated between the joint surfaces and the characteristics are stabilized.

FIG. 5 is an exploded perspective view showing another embodiment of the present invention. Similar to the embodiment shown in FIG. 1, the pressing plate 16 of the work fixing jig 10 of this embodiment has three elongated through holes 18 for inserting the ferrite core 1.
Is formed. Two screw holes 24 are formed near both ends of the through hole 18 in the longitudinal direction. In order to securely fix the ferrite core 1, one screw hole 24 is formed from one end side in the width direction of the pressing plate 16, and the other screw hole 24 is formed from the other end side in the width direction of the pressing plate 16. It Further, two male screws 26 are arranged corresponding to the two screw holes 24, respectively. Further, two screw holes 14 are formed in the base plate 12 of the workpiece fixing jig 10 shown in FIG. 5 so as to correspond to the screw holes 24, respectively. The base plate 12 and the pressing plate 16 are overlapped, and two male screws 2
The pressing plate 16 is positioned and fixed to the base plate 12 by screwing 6 into the screw holes 24 and the screw holes 14. By using the workpiece fixing jig 10 shown in FIG. 5, the ferrite core 1 can be polished as described above, and the same effect can be obtained.

When the other end surface 1b which is the back surface of the ferrite core 1 is polished, the work fixing jig 10 shown in FIG. 1 is used, and then the one end surface 1a which is the bonding surface of the ferrite core 1 is polished. At this time, the workpiece fixing jig 10 shown in FIG. 5 may be used. When the ferrite core 1 has no warp, the one end surface 1a serving as a joint surface is formed.
Only one may be polished. Further, in the above embodiment, E
Although the case of polishing a type ferrite core has been described, the present invention is not limited to this, and may be applied to, for example, a C type ferrite core.

The design of each of the above-described embodiments may be arbitrarily changed without departing from the gist of the present invention. For example, a means for fixing the ferrite core 1 as a work to the through hole 18 is fixed. The tightening of the screw 20 is not limited, and may be appropriately performed by using a spring member or the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a front view solution view of the workpiece fixing jig shown in FIG.

3 is a side view solution diagram of the work fixing jig shown in FIG. 1. FIG.

FIG. 4 is a front view solution diagram showing a fixing state when polishing a bonding surface of a ferrite core.

FIG. 5 is an exploded perspective view showing another embodiment of the present invention.

FIG. 6 is a front view solution view showing an example of a conventional work polishing method which is the background of the present invention.

FIG. 7 is a front view showing a conventional ferrite core as an example of the background of the present invention.

[Explanation of symbols]

 1 Ferrite Core 1a One End Face 1b Other End Face 2 Jig 3 Adhesive 10 Work Fixing Jig 12 Base Plate 14 Screw Hole 16 Holding Plate 18 Through Hole 20 Fixing Screw 22 Screw Hole 24 Screw Hole 26 Male Screw

Claims (3)

[Claims] 1. A flat base plate for mounting a work whose at least one end face is to be polished; a flat base plate fixed on the base plate and having a through hole for inserting one end face of the work. A work fixing jig including a pressing plate and a fixing means for fixing the work in the through hole. 2. A method for polishing a work using the work fixing jig according to claim 1, wherein one end surface of the work is inserted into the through hole of the pressing plate, and the work is fixed by the fixing means. A step of fixing to the through hole, a step of abutting the other end surface of the work opposite to the one end surface thereof to the one main surface of the base plate to fix the pressing plate to the base plate, and polishing the one end surface of the work. A method for polishing a work, including the step of: 3. A work polishing method using the work fixing jig according to claim 1, wherein one end face of the work is inserted into the through hole of the pressing plate, and the work is fixed by the fixing means. Fixing to the through hole, abutting one end surface of the work to one main surface of the base plate to fix the pressing plate to the base plate, and polishing the other end surface of the work opposite to the one end surface A step of removing the pressing plate from the base plate together with the work, abutting the other polished end surface of the work with one main surface of the base plate, and fixing the pressing plate to the base plate; and A work polishing method, comprising the step of polishing one end surface of the work.