JPH04193426A - Cutting off method for ferrite plate - Google Patents

Abstract

PURPOSE:To cut a block with excellent accuracy by cutting the block so as not to reach a fixed table and to leave a little non-cut part, and then grinding the non-cut part after removing the block from the fixed table. CONSTITUTION:In a cutting off work of ferrite plates to cut off plate members of appropriate thickness from a block 2 of ferrite, cutting with a peripheral cutting edge such as that of a side milling cutter is performed not so deeply so as not to reach a fixed table 1 and to leave a little non-cut part A, and the non-cut part A is cut out by grinding. Hereby, respective separated ferrite plates 20... are obtained. Consequently, roughness of cutting such as burr is not generated, and cutting with excellent accuracy can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ferrite plate cutting method for cutting a plate material of an appropriate thickness from a ferrite block.

(Prior art) In the cutting process of a ferrite plate, in which a plate material of an appropriate thickness is cut out from a ferrite block, as shown in FIG.
A method is used in which the plate is cut to an appropriate thickness using a peripheral cutter such as a side milling cutter. At this time, the block 2 is attached to the fixing base 1 through an adhesive called wax.
It is placed on top and fixed with an adhesive force that allows it to be removed after cutting, and the cutting with the peripheral blade cuts deeply to the point where it reaches the fixed base 1. Further, each of the cut ferrite plates 20... is finished to a predetermined external dimension by grinding.

(Problem to be Solved by the Invention) However, in such a cutting process, the cut ferrite plate 20 naturally has a small adhesive surface with the fixing base 1 and the adhesive force is weak, so at the last moment when it is separated from the block 2. It may come off from the fixed base 1, and because it flies off from the cutting edge, there is an inconvenience that it causes roughness in the cutting, such as so-called burrs, at the last cutting site.

In addition, since the cut grooves remain on the fixed base 1, it cannot be used repeatedly.In other words, if the fixed base 1 is used repeatedly, the mounting block 2 may become loose due to the large number of grooves remaining. Therefore, the fixing base 1 has to be replaced frequently, which causes an undeniable increase in cost.

This invention was made in view of the above background, and its purpose is to provide an economical method for cutting a ferrite plate that allows cutting to be performed with good accuracy, free from cutting roughness such as cracks, and is excellent in terms of economy. do.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for cutting a ferrite plate by placing a ferrite block on a fixed stand and cutting the block into an appropriate thickness. The feature is that the block is cut to a depth that leaves only a slight uncut portion without cutting deep enough to reach the table, and then, after removing the block from the fixed table, the uncut portion is removed by grinding. (Function) According to the method described above, during the cutting process, the cut ferrite plate is not completely separated from the block, but is connected at the uncut part, and the block is placed on the fixed table. It remains fixed on the surface it is placed on. Further, since an uncut portion is left on the block, no cutting groove is naturally formed on the fixing table.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the application of a preferred embodiment of the present invention. Note that this figure is a perspective view similar to that of FIG. 2 showing the prior art, and the same parts are given the same reference numerals.

In this invention, basically, in the cutting process of a ferrite plate in which a plate material of an appropriate thickness is cut out from a ferrite block 2, cutting is performed deeply with a peripheral blade such as a side milling cutter until it reaches the fixed base 1. The cutting is performed at a depth such that a slight uncut portion A remains without cutting, and this uncut portion A is removed by grinding, thereby obtaining separate ferrite plates 20 . . . .

Of course, the block 2 is placed on the fixing base 1 via an adhesive called wax, and is fixed with an adhesive force that allows it to be removed after cutting, as in the past, and the uncut portion A can be ground flat. By grinding or rotary grinding. Further, the separated ferrite plates 20 are formed into desired external dimensions by final grinding as in the conventional method.

According to such a method, during the cutting process, the cut ferrite plate 20 is not completely separated from the block 2 and is connected at the uncut part A, and the block 2 is placed on the fixed base 1. It remains fixed on the surface.

That is, although cutting is performed to cut out the ferrite plate 20 from the block 2, the uncut portion A is left without being separated, so the adhering state remains unchanged, and the adhesion force is weakened. It doesn't fly off. Therefore, cutting can be performed with good accuracy without causing roughness in cutting such as so-called paris.

In addition, since the uncut portion A is left on the block 2, there is naturally no cutting groove on the fixed base 1, and therefore even if the fixed base 1 is used repeatedly, the block 2 on which it is placed will not wobble and be accurate. It can be fixed and cut with good precision. In this case, since the fixed base 1 can be used repeatedly, there is no need for the trouble of replacing it as in the conventional case, which is advantageous from an economic point of view.

In addition, block 2 is an uncut part A to be removed by grinding.
In other words, conventional finishing grinding allowances have roughness of cutting such as burrs, so a slightly larger amount was set in anticipation of this, but with the present invention, the roughness of cutting can be reduced. Since this does not occur, the finishing grinding allowance can be set appropriately and there is no waste.

(Effects of the Invention) As described above in detail in the embodiments, according to the ferrite plate cutting method according to the present invention, the cut ferrite plate is not completely separated from the block during the cutting process. The uncut portions are connected, so they do not come apart, and therefore do not have rough edges such as cracks, and can be cut with good precision.

Furthermore, since an uncut portion is left on the block, no cut grooves are formed on the fixing table, and the fixing table can be used repeatedly, which does not impede machining accuracy and is economical.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an application of an embodiment of the present invention, and FIG. 2 is a perspective view illustrating a conventional technique.

Claims (1)

[Claims] When cutting a ferrite plate by placing a ferrite block on a fixed table and cutting the block to an appropriate thickness, the depth of cut is such that only a slight uncut portion remains without cutting deep enough to reach the fixed table. 1. A method for cutting a ferrite plate, which comprises cutting the block with a grinder, then removing the block from the fixing table, and removing the uncut portion by grinding.