KR20130070025A

KR20130070025A - Diamond tool with excellent stability and adhesion and method of manufacturing the same

Info

Publication number: KR20130070025A
Application number: KR1020110137137A
Authority: KR
Inventors: 홍재현; 박형규; 이학석
Original assignee: 이화다이아몬드공업 주식회사
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2013-06-27

Abstract

PURPOSE: A diamond tool with excellent stability and adhesion performance and a manufacturing method thereof are provided to improve stability and a connection force by minimizing a loss of a cutting tip unit and by improving the connection force of the cutting tip unit and the shank. CONSTITUTION: A diamond tool(100) comprises a shank(120) and a cutting tip unit(140). The shank comprises a body unit(122) and a connection unit(124). The connection unit is formed on an outer periphery of the body unit. The cutting tip unit is individually connected to a plurality of the shanks. A pattern in which a pitch is below 2 mm is formed on the connection unit of the shank.

Description

DIAMOND TOOL WITH EXCELLENT STABILITY AND ADHESION AND METHOD OF MANUFACTURING THE SAME

The present invention relates to a diamond tool excellent in stability and bonding, and a method of manufacturing the same. More specifically, the contact area of the coupling portion to which the shank and the cutting tip portion are coupled increases, and the resistance to the force generated in the radial and thickness directions The present invention relates to a diamond tool and a method of manufacturing the same, which increase the adhesion between the shank and the cutting tip and protect the safety of the user.

Generally, diamond tools are tools used to cut or polish the surface of a workpiece.

In general, a diamond tool includes a shank constituting a body and a cutting tip attached to the shank. The cutting tip portion includes diamond particles and a binder. As the binder, a metal powder such as nickel powder, cobalt powder, or the like may be used.

Here, the cutting tip portion may be formed by mixing the binder and the diamond particles, followed by sintering, and then welding the shank using a method such as brazing welding or laser welding. In addition, the cutting tip may be formed by applying the binder to the shank outer circumferential surface, setting the diamond particles and then sintering.

However, when the cutting tip is formed by sintering after applying the binder to the shank outer circumferential surface, the sintering waiting time is long after the binder is applied, and the external impact is generated by the handling process. Can cause problems. In this case, therefore, the binder applying process must be performed again.

In addition, while the tool is in use, the cutting tip may fall off, in this case, may also threaten the safety of the operator.

These problems occur because the surface area of the shank outer circumferential surface is not wide and the concave-convex surface is not formed at the edge of the joining portion, so that the contact area of the binder is insufficient.

Background art related to the present invention is the Republic of Korea Patent Publication No. 10-2005-0089674 (2005. 09. 08. published), the document discloses a diamond tool with a tip and a method of manufacturing the same.

An object of the present invention is to increase the bonding between the cutting tip and the shank, and to provide a diamond tool having excellent safety and bonding strength to ensure stability by minimizing the dropping phenomenon of the cutting tip and the manufacturing method thereof.

Diamond tool excellent in safety and bonding force according to an embodiment of the present invention for achieving the above object is a shank including a body portion constituting the body and a plurality of coupling portions formed on the outer periphery of the body portion; And a cutting tip coupled to each of the coupling portions of the shank, wherein the coupling portion has a pattern having a pitch of 2 mm or less.

In this case, the edge of the coupling portion may be formed in a knurling pattern or irregularities pattern.

In addition, the diamond tool manufacturing method according to an embodiment of the present invention for achieving the above object comprises the steps of (a) forming an engaging portion having a pitch of 2mm or less by processing the outer periphery of the shank; (b) applying a binder to the outer periphery of the shank and then setting diamond particles in the binder; And (c) sintering the binder to form a cutting tip.

1 is a view showing a diamond tool according to an embodiment of the present invention.
2 shows a shank.
Figure 3 is an enlarged view showing the coupling of the coupling portion and the cutting tip.
Figure 4 is a flow chart illustrating a diamond tool manufacturing method according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a diamond tool having excellent safety and bonding strength and a method of manufacturing the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, a diamond tool having excellent safety and bonding strength of the present invention according to an embodiment of the present invention will be described.

1 is a view showing a diamond tool according to an embodiment of the present invention. 2 shows a shank. Figure 3 is an enlarged view showing the coupling of the coupling portion and the cutting tip.

1 to 2, the illustrated diamond tool 100 includes a shank 120 and a cutting tip 140.

Shank 120 is formed including a body portion 122 and the coupling portion 124.

The body portion 122 is coupled to a polishing device or a cutting device, and may be made of stainless steel or carbon steel. In this case, the body portion 122 may be formed in a wheel or plate shape. However, the shape of the body portion 122 is not limited thereto, and may be changed in design in various forms as necessary.

The coupling part 124 is formed along the outer circumference of the body part 122, and integrally formed or separated into a plurality of parts as necessary.

Conventional coupling portion 124 is formed with a flat edge, the resistance by the external impact is inferior. Because of this, there was a problem that the cutting tip 140 is dropped from the shank 120 .

However, the coupling portion 124 of the present invention is formed in a fine pattern with a pitch (pitch) 2mm or less. This is considered that when the pitch of the pattern is 2 mm or less, the contact area with the cutting tip 140 can be sufficiently secured.

Referring to FIG. 3, the pattern of the coupling part 124 may be formed as a knurling pattern or an uneven pattern on the edge of the coupling part 124.

The cutting tip part 140 is coupled to the coupling part 124. The cutting tip part 140 may be formed of a sintered body including the diamond particles 142 and the binder 144 for fusion bonding the diamond particles 142.

The binder 144 adheres the diamond particles 142 to the surface of the shank 120, and plays an important role in making the cutting tip 140 exert a cutting function. Therefore, the bonding material 144 must have a high bonding strength with the diamond particles, and must have abrasion resistance to achieve a steady state cutting. Cobalt (Co), nickel (Ni) powder, or the like may be used as the binder 144.

The cutting tip 140 may be manufactured by applying the binder 144 to each of the plurality of coupling units 124 and then sintering the binder 144 in a state where the diamond particles 142 are set.

Next will be described in more detail through the diamond tool manufacturing method according to an embodiment of the present invention.

Figure 4 is a flow chart illustrating a diamond tool manufacturing method according to an embodiment of the present invention.

Referring to FIG. 4, the illustrated diamond tool manufacturing method includes a shank processing step S410, a binder application and diamond particle setting step S420, and a binder sintering step S430.

In the shank processing step (S410), the outer circumferential surface of the shank is processed to form a coupling part.

The shank may be coupled to a polishing device, a cutting device, or the like, and may be in the form of a wheel or plate.

Each of the coupling parts may be formed in a knurled pattern or an uneven pattern to increase the contact area with the binder.

At this time, in the present invention, the coupling portion is formed in a fine pattern having a pitch of 2 mm or less.

Next, in the binder applying and diamond particle setting step (S420) after applying the binder to each of the bonding portion, the diamond particles are set to the binder.

In the present invention, the contact area with the bonding material can be sufficiently secured by forming the plurality of bonding portions in a fine pattern having 2 mm or less. Therefore, after application of the binder, the time is long until sintering, and the dropping of the binder from the bonding portion can be suppressed due to the external impact generated when the molded article is moved to the next process or assembled for sintering.

Moreover, even after sintering, the joining force of the shank and the cutting tip portion can be improved, and the phenomenon that the cutting tip portion is separated from the shank during use of the tool can be suppressed.

Next, in the sintering step (S430), after sintering the binder set with the diamond particles, it is cooled to form a cutting tip on the outer periphery of the shank. The sintering temperature may be determined according to the material of the binder and the like.

As described above, the diamond tool according to the present invention forms a coupling part located on the outer circumferential surface of the shank in a fine pattern having a pitch of 2 mm or less, thereby bringing about an improvement in bonding force through surface area increase.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Such changes and modifications can be said to belong to the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention will be determined by the claims described below.

100: diamond tool 120: shank
122: body portion 124: coupling portion
140: cutting tip portion

Claims

Shank comprising a body portion constituting the body, and a coupling portion formed on the outer periphery of the body portion; And
Includes; cutting tip portion coupled to each of the plurality of coupling portions of the shank,
A diamond tool, characterized in that a pattern having a pitch of 2 mm or less is formed at the engaging portion of the shank.

The method of claim 1,
The body
Diamond tool, characterized in that formed of stainless steel or carbon steel.

The method of claim 1,
The pattern of the coupling portion
And the edge of the coupling portion is a knurling pattern or an uneven pattern.

The method of claim 1,
The cutting tip portion
A diamond tool comprising diamond particles and binder.

5. The method of claim 4,
The cutting tip portion
And a diamond tool coupled to the joint by sintering the binder.

(a) processing the outer periphery of the shank to form a joining portion having a pitch of 2 mm or less;
(b) applying a binder to the outer periphery of the shank and then setting diamond particles in the binder; And
(C) sintering the binder to form a cutting tip portion; diamond tool manufacturing method comprising a.

The method according to claim 6,
In the step (a)
The above processing
It is a knurling pattern or an uneven | corrugated pattern, The diamond tool manufacturing method characterized by the above-mentioned.