JP3121394B2 - Super abrasive cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superabrasive cutter particularly suitable for cutting highly brittle materials such as stones, concrete and tiles.

[0002]

2. Description of the Related Art Conventionally, as this kind of superabrasive cutter,
A disk-shaped base having an abrasive layer fixed to the outer periphery is widely used.

In such a superabrasive cutter, the temperature of the abrasive layer reaches 1000 ° C. or higher during the cutting operation, and the heat is quickly removed to prevent the abrasive grains from being oxidized and consumed. A large amount of cooling water needs to be supplied.

On the other hand, recently, the use of cooling water tends to be restricted from the viewpoint of road pollution due to cutting wastewater, and it is particularly necessary to effectively use a small amount of cooling water.

To cope with such a situation, conventionally,
A method of collecting cutting wastewater by vacuum, precipitating large chips and circulating the supernatant, or a method of cutting by the up-cut method and working while pulling in the water accumulated in the kerf, etc. Has been adopted.

[0006]

However, in the former method, there is a problem that the required cooling water accumulated in the kerf is sucked, and the cooling water is in a shortage state. In the latter method, however, there is a problem. The machine used is
Since it is manufactured so as to be easy to use in the down-cut method, there is a problem that it is difficult to use in the up-cut method.

As described above, none of the conventional methods basically solves the problem of effectively using a small amount of cooling water.

FIGS. 4A and 4B show the state of supply of cooling water in a conventional superabrasive cutter, wherein FIG. 4A is a plan view and FIG. W is supplied to the cutting point of the abrasive grain layer 22 along the surface of the base metal 21. However, in such a conventional superabrasive grain cutter, since the abrasive grain layer 22 is formed to protrude in the width direction than the base metal 21, the cooling water W transmitted along the surface of the base metal 21 is I was flipped at the base,
Not enough cutting points can be supplied. For this reason, a conventional superabrasive cutter requires a large amount of cooling water as described above.

The present invention solves such a problem in a superabrasive cutter for cutting by supplying cooling water, and an abrasive layer structure capable of reliably supplying cooling water to a cutting point is obtained. It is an object of the present invention to provide a superabrasive cutter capable of cutting efficiently with a small amount of cooling water.

[0010]

An attempt to solve that means the present invention is to secure the cutting abrasive layer continuously on the outer periphery of the base metal, both side surfaces of the abrasive grain layer
A super-abrasive cutter provided with a concave groove through which cooling water flows, and having a curved portion with a radius of 2.5 to 3.0 mm at four corners.
The long axis of the protruding part is attached to both sides of the abrasive grain layer.
At an interval inclining with respect to the radial direction of the
And between the protruding portion and the protruding portion is the concave groove;
Means that the groove depth is 0.1 to T × 1/1 with respect to the total width T of the abrasive layer.
3 mm and a groove width of 1.0 to 2.0 mm .

The concave groove is formed by protruding an oval-shaped protrusion having a curved portion with a radius of 2.5 to 3.0 mm at each of the four corners on both surfaces of the abrasive grain layer.
Rotate the long axis of the part outward with respect to the radial direction of the cutter
It is formed in such a manner as to be inclined toward the direction side and arranged at intervals .

The groove has a groove depth of 0.1 to T × １ ／ mm and a groove width of 1.0 to 2.0 with respect to the total width T of the abrasive grain layer.
mm is effective.

[0013]

The cooling water injected from the cooling water supply nozzle to the surface of the base metal travels along the surface of the base metal, and is efficiently supplied to the cutting point through the concave groove of the abrasive layer.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below with reference to the embodiments shown in the drawings.

FIG. 1A is a plan view of the superabrasive cutter of this embodiment, FIG. 1B is a sectional view taken along the line AA of FIG. 1A, FIG. 2 is a perspective view of an abrasive layer portion, and FIG. (A) is a top view of the principal part for explaining the supply situation of cooling water, (b) is the same sectional view.

Referring to FIGS. 1 and 2, a superabrasive cutter 1 according to the present embodiment includes a disk-shaped base metal 2 and a cutting blade fixed to the outer periphery thereof and formed of diamond, cBN, or the like. And a grain layer 3.

The abrasive layer 3 has a plurality of protrusions 3b, 3b,... Formed to protrude from the abrasive layer main body 3a, as is apparent from the perspective view of FIG. 3b ...
Are defined as concave grooves 3c through which the cooling water flows. The protrusions 3b have an oval shape, and are arranged in a staggered pattern on both surfaces of the main body 3a. Also, its long axis XX
Are inclined at α = about 30 degrees with respect to the radial direction. A curved portion 3d of 2.5 to 3.0 mmR is formed at each of the four corners of the protruding portion 3b, and is shaped so as to improve the flow of the cooling water to the cutting point.

The width and depth of the concave groove 3c can be determined from the viewpoints of efficient passage of cooling water, cutting ability and productivity. Specifically, the groove depth D is set to 0.1 mm to T × １ ／ mm, and the groove width B is set to 1.0 to the entire width T of the abrasive layer.
It is preferably set to 2.0 mm.

In the above configuration, as shown in FIG. 3, the cooling water W sprayed from the cooling water supply nozzle N to the surface of the base 2
Is efficiently supplied to the cutting point of the abrasive grain layer 3 through the concave groove 3c of the abrasive grain layer 3 along the surface of the base metal 2. In particular, since the curved portions are formed at the four corners of the protruding portion 3b and the long axis is inclined with respect to the radial direction, the cooling water smoothly flows into the concave groove 3c without flipping. In addition, since air efficiently flows into the concave groove 3c during rotation, the cooling effect of the abrasive layer 3 can be further enhanced in combination with the effect of the cooling water W.

In the above embodiment, a continuous type superabrasive cutter has been described. However, the present invention is not limited to this, and it is of course possible to use a so-called segment type cutter. is there.

[0021]

According to the present invention, the following effects can be obtained.

(1) The cooling effect of the cutting edge is remarkably improved with a small amount of cooling water, the cutter is less deteriorated, and the life is extended.

(2) Since a large amount of cooling water is supplied to the cutting edge, chips are smoothly discharged and cutting efficiency is improved.

(3) Since cutting can be performed with a small amount of cooling water, the cooling water does not stain road surfaces and the like.

(4) Since the cutting process has a high cooling effect, the cut surface can be finely finished with little thermal influence on the work material.

[Brief description of the drawings]

FIG. 1 (a) is a plan view of a superabrasive cutter of the present embodiment,
FIG. 2B is a sectional view taken along line AA of FIG.

FIG. 2 is a perspective view of an abrasive layer portion of the superabrasive cutter shown in FIG.

FIG. 3A is a plan view of a main part for explaining a supply state of cooling water, and FIG. 3B is a sectional view of the same.

FIG. 4 (a) is a plan view of a main part for explaining a supply state of cooling water in a conventional superabrasive cutter, and FIG. 4 (b) is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Super-abrasive grain cutter 2 Base metal 3 Abrasive grain layer 3a Abrasive grain layer main part 3b Projection part 3c Concave groove 3d Curve part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-228579 (JP, A) JP-A-59-118375 (JP, A) JP-A-63-150164 (JP, A) 79261 (JP, U) JP-A 2-43163 (JP, U) JP-A 63-83269 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B24D 5/12 B24D 5 / 00 B24D 5/10

Claims (1)

(57) [Claims] An abrasive grain layer for cutting is continuously fixed to an outer periphery of a base metal, and concave grooves through which cooling water flows are provided on both side surfaces of the abrasive grain layer.
It is a super-abrasive girder cutter and has an oval shape having curved portions with a radius of 2.5 to 3.0 mm at four corners.
The long axis of the protruding part on both sides of the abrasive layer
-It is inclined at a distance to the radial direction of
The groove between the protrusions is the groove, and the groove is
The groove depth is set to 0.1 to T × ｍ m with respect to the total width T of the grain layer.
A super-abrasive grain cutter characterized by having a linear shape with a groove width of 1.0 to 2.0 mm .