JP2019119020A - Cutting blade - Google Patents

Abstract

To provide a cutting blade having no directivity with respect to removal effect of cutting chips.SOLUTION: A cutting blade comprises: a circular plate-shaped or annular plate-shaped blade body 2; and a cutting edge portion 3 fixed with abrasive grains at least on an outer peripheral part. The blade body has multiple through-holes formed in the vicinity of the outer peripheral edge thereof. The multiple through-holes are constituted of first slots 4a and second slots 4b extending, with the respective slots oppositely inclined at the same angle with respect to a radial direction. The first slots and the second slots are alternately arranged in units of one or more of the respective slots.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutting blade used for cutting and separating an electronic component.

In the production of electronic parts, for example, when cutting a laminate of a green body obtained by laminating a plurality of green sheets of a ceramic material and a conductor pattern, a cutting blade such as a disk-shaped or ring-shaped diamond blade A step of cutting into chips by a rotation method is performed using
In the cutting process using such a cutting blade, there is an adverse effect on the chip due to the swarf not being properly discharged. For example, there is a problem that chips may cause defects after firing called chipping, or may develop into functional defects that impede the conduction with the internal electrodes.

In addition, when cutting chips remain in the form of a band on the surface of the adhesive sheet, they are peeled off together when peeling off the chips, become powdery and mix with the chips, and it is necessary to separate them before firing. is there.
Furthermore, cutting debris adheres to the cutting blade, and there is a problem that a scratch 110a is generated on the side surface of the cut chip 110 as shown in FIG.
In addition, swarf shortens the life of the cutting blade, and defects such as chipping and tip wear occur in the cutting blade due to long-term use, which may damage the chip or cut the cross section of the chip The shape may be deformed, and a deformed tip may be generated.

  DESCRIPTION OF RELATED ART In order to discharge | emit cutting waste conventionally, the cutting device of the plate-like to-be-processed object using the rotary blade (blade for a cutting | disconnection) which formed multiple through holes in patent document 1 is proposed. In the rotary blade of this cutting device, since the plurality of elongated hole-shaped through holes are formed at equal intervals in the circumferential direction by being inclined in a constant direction with respect to the radial direction, cutting wastes are held in the through holes. While being rotated while being conveyed to the outside of the workpiece, it is possible to remove cutting waste from the through hole to the outside without adversely affecting the workpiece by the external pressure such as water or air. .

Unexamined-Japanese-Patent No. 2004-202658

The following problems remain in the above-mentioned prior art.
In the cutting blade described in the conventional patent document 1, as shown in (a) and (b) of FIG. 4, a plurality of elongated through holes 103 are formed to be inclined in a fixed direction with respect to the radial direction. Therefore, there is a problem that directivity occurs in the traveling direction when the rotary cutting is performed. That is, as shown in (a) and (b) of FIG. 4, assuming that the traveling direction (the direction of the arrow D) with respect to the workpiece 100 is reverse without changing the rotation direction of the rotary blade 101. In the case of a), the upper cutting is performed, and in the case of (b) of FIG. 4, the down cutting is performed. When the amounts of chips in the two cutting methods are compared by weight, a difference will occur as shown in the graph shown in FIG. In this graph, when the initial weight of the workpiece 100 is 100%, the weight after cutting is calculated to decrease by 30% and the experiment is performed (white circles in the graph are set) value). From this experimental result, it can be seen that in the cutting blade of Patent Document 1 described above, if the traveling direction is different with respect to a fixed rotation direction, a difference is generated in the chip removal efficiency, and directivity is exhibited. As described above, since the cutting blade of Patent Document 1 has the above-mentioned directivity, the mounting direction of the cutting blade and the advancing direction of the workpiece are limited to one direction, and therefore, the mounting direction of the cutting blade and the workpiece It was necessary to confirm the installation direction of the workpiece, etc., which was troublesome.

  The present invention was made in view of the above-mentioned subject, and an object of the present invention is to provide a cutting blade which does not have directivity about a chip removal effect.

  The present invention adopts the following configuration in order to solve the problems. That is, the cutting blade according to the first aspect of the present invention is a cutting blade including a circular plate-like or annular plate-like blade main body and a cutting edge portion having abrasive grains fixed to at least the outer peripheral portion of the blade main body. A plurality of through holes formed in the vicinity of the outer peripheral edge of the blade body, and the plurality of through holes extending in directions inclined at the same angle on opposite sides with respect to the radial direction The first elongated holes and the second elongated holes, and the first elongated holes and the second elongated holes are alternately arranged in the circumferential direction by one or more units. Do.

  In this cutting blade, the plurality of through holes are constituted by a plurality of first elongated holes and a second elongated hole extending in directions inclined at the same angle on opposite sides to each other in the radial direction, Since the elongated holes and the second elongated holes are alternately arranged in the circumferential direction in one or more units, it is possible even if the traveling direction of the workpiece at the time of cutting is different with respect to a fixed rotation direction. Due to the symmetrical effect of the long holes and the second long holes, a similar chip removal effect can be obtained, and almost no directivity occurs.

  The cutting blade according to a second aspect of the invention is the blade according to the first aspect, wherein the first long hole and the second long hole are linear long holes extending in the extending direction. It features.

  The cutting blade according to a third aspect of the present invention is the cutting blade according to the first aspect, wherein each of the first long hole and the second long hole is an oval long hole having a major axis in the extending direction. It is characterized by

According to the present invention, the following effects are achieved.
That is, according to the cutting blade according to the present invention, the plurality of through holes extend in the direction inclined at the same angle to the opposite side with respect to the radial direction and the plurality of first elongated holes and the second long holes. Since the first elongated holes and the second elongated holes are alternately arranged in the circumferential direction by one or more units, which are formed by the holes, the progress of the workpiece at the time of cutting with respect to the fixed rotation direction Even if the direction is different, the same chip removal effect can be obtained, and the directivity hardly occurs.
Therefore, in the cutting blade of the present invention, the advancing direction of the workpiece is not limited with respect to the rotation direction of the cutting blade, and therefore confirmation of the mounting direction of the cutting blade and the installation direction of the workpiece becomes unnecessary. , Work will be easier. In addition, since there is almost no directivity, it is not necessary to set conditions for cutting conditions (rotational speed, cutting movement speed, surface roughness of blade, etc.) and experiments to verify them in each direction, and setting conditions etc. This makes it easy to check the

It is a top view of the whole showing a 1st embodiment of a cutting blade concerning the present invention. It is a top view of an important section showing a 2nd embodiment of a cutting blade concerning the present invention. In the Example of the cutting blade which concerns on this invention, it is the graph which compared the quantity of the cutting waste by weight by upper cutting and down cutting. FIG. 8 is an explanatory view showing a case of upper cutting (a) and a case of down cutting (b) in the conventional example of the cutting blade according to the present invention. In the prior art example of the cutting blade which concerns on this invention, it is the graph which compared the quantity of the cutting waste by weight by upper cutting and down cutting. It is a perspective view which shows the flaw which arose in the tip of the electronic component cut | disconnected with the conventional diamond blade.

  Hereinafter, a first embodiment of a cutting blade according to the present invention will be described with reference to FIG. In addition, in each drawing used for the following description, in order to make each member a recognizable or easily recognizable size, the scale is appropriately changed.

  In the cutting blade 1 of the present embodiment, as shown in FIG. 1, abrasive grains such as diamond abrasives are fixed to at least the outer peripheral portion of a circular plate-like or annular plate-like blade main body 2 and the blade main body 2. A cutting blade having a cutting edge portion 3 and having a plurality of through holes formed in the vicinity of the outer peripheral edge of the blade main body 2, wherein the plurality of through holes are opposite to each other in the radial direction The plurality of first elongated holes 4a and the second elongated holes 4b extend in the direction inclined at the same angle.

  The first elongated holes 4a and the second elongated holes 4b are alternately arranged circumferentially in units of one or more. In the present embodiment, the first elongated holes 4a and the second elongated holes 4b are alternately disposed circumferentially one by one. Further, the 24 first long holes 4a and the second long holes 4b are arranged at equal intervals in the circumferential direction.

The first elongated hole 4a is inclined at an angle θ1 with respect to the radial direction, and the second elongated hole 4b has a first elongated hole with respect to the radial direction. It forms with the angle theta 2 on the opposite side to 4a, and the angle theta 1 and the angle theta 2 are set as the same angle.
The first elongated holes 4a and the second elongated holes 4b are linear elongated holes extending with the same width in the extending direction.
The first long holes 4a and the second long holes 4b are formed by laser processing or die processing.

The blade main body 2 is one in which diamond abrasive grains are dispersed and held in a metal plating phase mainly composed of nickel.
In the present embodiment, the blade main body 2 is, for example, an annular shape having a diameter of 51.4 mm and a thickness of 50 μm.

Further, the angle θ1 of the first elongated hole 4a and the angle θ2 of the second elongated hole 4b are set at 45 °, for example.
The length L of each of the first long hole 4a and the second long hole 4b is set to 4 mm, for example, and the width W is set to 0.8 mm.
Furthermore, the distance H between the first long hole 4a and the second long hole 4b is set to, for example, 3.5 mm, and the first long hole 4a and the second long hole 4b and the outer peripheral edge of the blade main body 2 The distance S of is set to 0.1 mm.

  When cutting and processing a green body (workpiece) such as an electronic component using the cutting blade 1 of the present embodiment, the green body is cut at the cutting edge portion 3 of the cutting blade 1 rotated at high speed. Move in the direction of travel to cut. At this time, a liquid such as water or a gas such as air is sprayed to a portion exposed to the outside of the cutting blade 1 and sprayed to blow the inside of the first long hole 4a and the second long hole 4b. Push out the cut chips that have entered it and remove it.

  In addition, since the first long holes 4a and the second long holes 4b are respectively formed to extend radially, the cutting debris that has entered the hole moves along the extending direction in the hole at the time of cutting. As a result, it is difficult to get out of the hole in the processed groove of the green body, so it is possible to further suppress the generation of the damage of the green body.

  As described above, in the cutting blade 1 according to the present embodiment, the plurality of through holes extend in the direction inclined at the same angle on the opposite side with respect to the radial direction and the plurality of first elongated holes 4a and the second Since the long holes 4b and the first long holes 4a and the second long holes 4b are alternately arranged in the circumferential direction in units of one or a plurality of units, the object to be cut at the time of cutting in a fixed rotation direction is Even if the direction of movement of the workpiece is different, the same effect of removing chips can be obtained by the symmetrical effect of the first elongated holes 4a and the second elongated holes 4b, and the directivity hardly occurs.

  Next, a second embodiment of the cutting blade according to the present invention will be described below with reference to FIG. In the following description of the embodiment, the same components as those described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The second embodiment differs from the first embodiment in that in the first embodiment, the first elongated holes 4a and the second elongated holes 4b are linear elongated holes extending in the extending direction. On the other hand, in the cutting blade 21 of the second embodiment, as shown in FIG. 2, the first elongated holes 24 a and the second elongated holes 24 b respectively arrange the major axes in the extending direction. It is a point which is a long hole of elliptical shape.

Also in the second embodiment, the long axis directions of the first long holes 24a and the second long holes 24b are set to directions inclined at the same angles θ1 and θ2 on opposite sides of the radial direction.
As described above, in the cutting blade 21 according to the second embodiment, as in the first embodiment, the plurality of first elongated holes 24 a extending in the directions inclined at the same angle on opposite sides to each other in the radial direction Since the second long holes 24 b are alternately arranged in the circumferential direction, little directivity occurs in the chip removal effect.

Regarding the cutting blade of the first embodiment as an example of the present invention, the results of comparing the amount of cutting waste by weight in two methods of upper cutting and down cutting in which the moving direction of the workpiece is changed It is shown in FIG.
As can be seen from this result, in the example of the present invention, the amount of cuttings hardly changed between the upper cutting and the down cutting, and there was almost no directivity.

The technical scope of the present invention is not limited to the above embodiments and examples, and various modifications can be made without departing from the scope of the present invention.
For example, in each of the above embodiments, the first elongated holes and the second elongated holes are alternately arranged one by one in the circumferential direction, but a plurality of units of the first elongated holes and the second elongated holes are provided. That is, they may be alternately arranged in the circumferential direction by two or three.

  1, 21 ... blade for cutting, 2 ... blade body, 3 ... cutting edge portion, 4a, 24a ... first long hole, 4b, 24b ... second long hole

Claims (3)

A cutting blade comprising: a circular plate-like or annular plate-like blade main body; and a cutting edge portion in which abrasive grains are fixed to at least an outer peripheral portion of the blade main body,
It has a plurality of through holes formed in the vicinity of the outer peripheral edge of the blade body,
The plurality of through holes are constituted by a plurality of first elongated holes and a second elongated hole extending in directions inclined at the same angle on opposite sides to each other in the radial direction;
A cutting blade characterized in that the first elongated holes and the second elongated holes are alternately arranged circumferentially in one or more units. In the cutting blade according to claim 1,
A cutting blade characterized in that the first elongated hole and the second elongated hole are linear elongated holes respectively extending in the extending direction. In the cutting blade according to claim 1,
A cutting blade characterized in that each of the first long hole and the second long hole is an oval long hole having a major axis in the extending direction.