KR20170001126A

KR20170001126A - Diamond tool

Info

Publication number: KR20170001126A
Application number: KR1020150090671A
Authority: KR
Inventors: 심용섭; 심은경
Original assignee: 심용섭; 심은경
Priority date: 2015-06-25
Filing date: 2015-06-25
Publication date: 2017-01-04

Abstract

The present invention relates to a diamond tool, and more particularly, to a diamond tool which comprises a shank having a disc-shaped body portion provided on a rotary drive portion and rotating, a shank provided with a plurality of engaging portions spaced apart from each other along a circumferential direction on an outer circumferential surface of the body portion, And a cutting layer formed by applying a cutting material. The coupling portion has a plurality of lead-in grooves so that a part of the cutting material can be drawn in.
Since the diamond tool according to the present invention has a plurality of lead-in grooves formed in the coupling portion, the contact area of the cutting material with respect to the coupling portion is increased, so that the cutting layer is firmly fixed to the shank, and even if the cutting layer is worn, The cutting tool is exposed to the outside, so that the cutting operation can be maintained for a predetermined time.

Description

Diamond tool {Diamond tool}

The present invention relates to a diamond tool, and more particularly, to a diamond tool that increases the clamping force of a cutting layer with respect to a shank and performs a cutting operation while a part of the cutting material remains even if the cutting layer is worn.

In general, a diamond tool is a tool used to cut or polish a surface of a workpiece. Conventional diamond tools include a body shank and a cutting tip portion attached to the shank. The cutting tip includes diamond particles and a binder. The binder may be a metal powder such as nickel powder, cobalt powder, or the like.

Here, the cutting tip may be formed by mixing and sintering the binder and diamond particles, and then welding the shank by using a method such as brazing or laser welding. The cutting tip can also be formed by applying the binder to the outer surface of the shank, setting the diamond particles, and then sintering.

However, in the conventional diamond tool, the contact area of the engaging portion with respect to the cutting tip is relatively narrow, the fixation force of the cutting tip portion to the engaging portion is low, the cutting tip is interrupted at the time of abrasion, There are disadvantages.

Korean Patent Registration No. 10-0592711: Cutting tool with tip and manufacturing method thereof

It is an object of the present invention to provide a diamond tool capable of advancing a cutting operation even if the contact area of the cutting tool with respect to the coupling part is widened and the cutting layer is worn.

According to an aspect of the present invention, there is provided a diamond tool including a disk-shaped body portion mounted on a rotation driving portion, a shank provided with a plurality of coupling portions spaced from each other along a circumferential direction on an outer circumferential surface of the body portion, And a cutting layer formed by applying a cutting material containing diamond particles to an outer circumferential surface of the joining portion. The joining portion is formed with a plurality of feed grooves so that a part of the cutting material can be drawn in.

The inlet groove may be formed at a predetermined depth to the rotational center of the body with respect to the outer circumferential surface of the engaging portion so that the cutting insert, which is drawn into the inside of the cutting layer, may be exposed to the outside.

The engaging portion may be formed by a friction between the object to be cut and the cutting layer so as to radiate heat to be transmitted to the body portion so as to allow the outside air to pass between the inlet grooves formed apart from each other along the circumferential direction of the body portion. A through hole is formed.

The lead groove may be formed so as to penetrate in the longitudinal direction of the rotation center line of the body portion so that the frictional heat between the cutting material and the object to be cut, which are drawn into the inside, can be easily radiated to the outside.

The lead groove may be formed to have an increased width from an outer circumferential surface of the engaging portion toward a rotational center side of the body portion so that an exposed area of the cutting insert drawn into the engaging portion may increase according to a wear depth of the engaging portion.

Since the diamond tool according to the present invention has a plurality of lead-in grooves formed in the coupling portion, the contact area of the cutting material with respect to the coupling portion is increased, so that the cutting layer is firmly fixed to the shank, and even if the cutting layer is worn, The cutting tool is exposed to the outside, so that the cutting operation can be maintained for a predetermined time.

1 is a front view of a diamond tool according to an embodiment of the present invention,
Figure 2 is a partial perspective view of the diamond tool of Figure 1,
Figure 3 is a cross-sectional view of the diamond tool of Figure 1,
4 is a partial perspective view of a diamond tool according to another embodiment of the present invention.

Hereinafter, a diamond tool according to the present invention will be described in more detail with reference to the accompanying drawings.

1 to 3 show a diamond tool 100 according to the present invention.

Referring to FIG. 1, a diamond tool 100 includes a body 210 installed in a rotation driving unit (not shown), a plurality of coupling parts 220 (not shown) spaced from each other along a circumferential direction on the outer circumferential surface of the body 210, And a cutting layer 230 formed by applying a cutting material containing diamond particles to the outer circumferential surface of the coupling part 220.

The body portion 210 is formed in a disc shape having a predetermined thickness, and a coupling portion is formed at a central portion to which the rotation axis of the rotation driving portion is coupled. The body 210 may be formed of stainless steel, carbon steel, or the like having predetermined strength. Although not shown in the drawing, the rotation driving unit includes a driving motor and a rotation shaft connected to the driving motor and coupled to the body 210 to transmit rotational force generated from the driving motor to the body 210 .

The coupling portions 220 are formed on the outer circumferential surface of the body portion 210 such that a plurality of coupling portions 220 are spaced apart from each other along the circumferential direction. The coupling part 220 is formed integrally with the body part 210 and protrudes radially with respect to the outer peripheral surface of the body part 210.

At this time, the coupling part 220 is formed with a plurality of lead-in grooves 221 so that a part of the cutting material can be drawn in. The insertion groove 221 is formed in the center of rotation of the body 210 with respect to the outer circumferential surface of the coupling part 220 so that the cutting material drawn into the cutting layer 230 may be exposed to the outside. It is preferable to be formed to be deeply drawn.

In addition, it is preferable that the lead-in groove 221 is formed so as to penetrate in the longitudinal direction of the center line of rotation of the body 210 so that the heat of friction between the cutting material and the object to be cut,

When the cutting layer 230 is completely worn out during the long time cutting operation, the cutting material introduced into the lead-in groove 221 is exposed, and the cutting object is brought into contact with the exposed cutting material without repairing the cutting layer 230 The cutting operation can be performed for a predetermined time.

The engaging portion 220 is spaced apart along the circumferential direction of the body portion 210 in order to dissipate heat generated by the friction between the object to be cut and the cutting layer 230 and transmitted to the body portion 210, An outer air passage hole 222 is formed to allow the outside air to pass between the inlet recesses 221 formed to be formed. The outside air passing hole 222 is formed in the coupling part 220 so as to penetrate in the longitudinal direction of the rotation center line of the body part 210.

Although not shown in the drawing, a plurality of vortex generating protrusions may be formed on the inner circumferential surface of the outer air passage hole 222 so as to generate a vortex in the outer air passing through the outer air passage hole 222 . The vortex generating protrusions may protrude toward the center of the outer air passage hole 222 with respect to the inner peripheral surface of the outer air passage hole 222 and may be curved at a predetermined curvature.

The cutting layer 230 is formed by applying a cutting material containing diamond particles to the outer circumferential surface of the coupling portion 220. At this time, it is preferable that the cutting layer 230 is formed on the outer circumferential surface except for both side surfaces of the engaging portion 220.

The operator applies the bonding material to the outer circumferential surface of the joint part 220, and then applies the cutting material to the joint material and sinters the cutting material to produce the cutting layer 230. The bonding material should have a high bonding strength with the diamond particles, and cobalt (Co) and nickel (Ni) powder excellent in abrasion resistance can be used so that cutting can be performed.

Since the diamond tool 100 according to the present invention constructed as described above has a plurality of insertion grooves 221 formed in the coupling part 220 to increase the contact area of the cutting material with respect to the coupling part 220, The cutting layer 230 is more firmly fixed with respect to the cutting insert 230. Even if the cutting layer 230 is worn, the cutting insert that is drawn into the insert groove 221 is exposed to the outside, so that the cutting operation can be maintained for a predetermined time.

4, a coupling part 240 according to another embodiment of the present invention is shown.

Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.

Referring to the drawing, the engaging portion 240 is formed so that the recessed groove 241 is formed in the outer peripheral surface of the engaging portion 240 so that the exposed area of the cutting insert, which is drawn in according to the depth of wear of the engaging portion 240, The width of the body portion 210 increases toward the rotation center side of the body portion 210.

When the cutting layer 230 is completely worn out during the cutting operation and the outer circumferential surface of the joint portion 240 is exposed, the outer circumferential surface of the joint portion 240 is abraded by contacting the cutting object. At this time, depending on the depth of wear of the joint portion 240 Since the exposed area of the cutting material introduced into the lead-in groove 241 is expanded, it is possible to provide relatively stable cutting performance even if the cutting layer 230 is worn.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: Diamond tool
200: shank
210:
220:
221: inlet groove
222: outside air passing hole
230: cutting layer

Claims

A shank having a disc-shaped body portion provided on the rotary drive portion and provided with a plurality of coupling portions spaced apart from each other along a circumferential direction on the outer peripheral surface of the body portion;
And an cutting layer formed by applying a cutting material having diamond particles on an outer circumferential surface of the engaging portion,
Wherein the engaging portion is formed with a plurality of lead-in grooves so that a part of the cutting material can be drawn in.

The method according to claim 1,
Wherein the inlet groove is formed at a predetermined depth to the rotational center of the body with respect to the outer circumferential surface of the engaging portion so that the cutting material drawn into the inside of the cutting layer when the cutting layer is worn is exposed to the outside.

3. The method of claim 2,
The engaging portion may be formed by a friction between the object to be cut and the cutting layer so as to radiate heat to be transmitted to the body portion so as to allow the outside air to pass between the inlet grooves formed apart from each other along the circumferential direction of the body portion. Wherein a through hole is formed.

The method of claim 3,
Wherein the inlet groove is formed to penetrate in a longitudinal direction of a center line of rotation of the body so that the frictional heat between the cutting material and the object to be cut, which are drawn into the insert, can be easily radiated to the outside.

5. The method of claim 4,
Wherein the recess has a width increasing from an outer circumferential surface of the engaging portion to a rotational center side of the body portion so that an exposed area of the cutting insert drawn into the engaging portion is increased according to a wear depth of the engaging portion.