JPS5930668A - Diamond dresser - Google Patents

Abstract

PURPOSE:To enable to use a diamond dresser economically to the last, by so constituting that a cylindrical artificial diamond having an uneven surface in a state of frosted glass is joined with a supporter, in a dresser for a bit for excavation of rock. CONSTITUTION:A dresser is so constituted that a cylindrical artificial diamond 1 inlaid in a cave-in part 3 of a supporter 2 together with an adhesive 4, such as solder is joined with the supporter through head treatment. The cylindrical artifical diamond 1, whose cross section is round or triangular or square or starform, possesses a length l of more than one and half times of the diameter D of the section at least, crystal orientation in the longitudinal direction of which possesses a lll direction or 100 direction or 110 direction, and the surface of which possesses an uneven surface in a state of frosted glass. The diamond can be used to the last, the diamond is not separated from the supporter as joining strength is increased too and is superior in its wear-resisting performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a weight dresser using a rod-shaped diamond having an irregular cross-sectional shape such as a circular shape, a polygonal shape, a star shape, etc.
This relates to diamond dressers such as feldspar dressers and implied dressers.

Diamond, which has the highest hardness of all substances, is used as the cutting edge material for pits for excavating rocks and for dressers for modifying grinding wheels. The size of the diamond used in these tools must be approximately 1 mm or larger, and since it is not currently produced on an industrial scale, a natural product called Polar is used. .

It is known that the wear resistance of diamond varies greatly depending on the plane orientation of the crystal, and selection of the plane orientation is an important issue when used in these tools. By the way, natural diamonds are subject to melting action during the production process, so they rarely have an idiomorphic shape, but are generally rounded and take on various shapes depending on the degree of melting. Therefore, the current situation is that considerable skill is required to determine the plane orientation of the crystal and make it suitable for use as a tool.

Normally obtained natural diamonds have approximately the same diameter and length, as shown in Figure 1 fat, and have a smooth surface.During the production process, they are subjected to melting action as described above, so their edges are sharp. It has a rounded feel.

For this reason, when using it as a dresser, see Figure 1 (1).
) As shown in Figure (1), approximately half of it is buried in the bonding material of the support, so the usable part is extremely small and cannot be used until the end (Figure (1)). ). Further, as mentioned above, since the surface is smooth, the bonding strength with the bonding material is weak, so there is a drawback that the bonding material may come off during use. In FIG. 1, (1') is a natural diamond, (2') is a support, and (4 are bonding materials).

The present invention was developed to eliminate the above drawbacks, and uses a special artificial diamond. The invention will now be explained in detail with reference to the exemplary drawings.

The diamond used in the present invention is an artificial rod-shaped diamond (1) as shown in Fig. 2, and the cross-sectional shape is circular (Fig. (a)), triangular (Fig. [C) ), for example, has an unusual shape such as a star shape (Figure (d)), and has a length at least 1.5 times (t≧1.5D) the equal cross-sectional area and diameter (1)). t+ and whose crystal orientation (length direction) is <111> direction or <1
It has a 00> direction or a <110> direction, and its surface has a frosted glass-like uneven surface. Note that (S) in FIG. 2 indicates the cross-sectional area I)-P.

The artificial rod-shaped diamond described above can be manufactured by the following method, as previously developed and patented by the present applicant (Japanese Patent Application No. 110398/1982).

That is, as shown in Fig. 5, a diamond synthesis reaction system consisting of a carbon source (13), a solvent metal (12) placed in contact with it, and a seed crystal (11) is heated under high pressure and high temperature at which diamond is thermodynamically stable. An appropriate temperature gradient is created in the reaction chamber containing the reaction system, and heated so that the part of the solvent metal in contact with the carbon supply source is at a high temperature, and the part in contact with the seed crystal is at a low temperature. , a method in which carbon is transported from a high-temperature part to a low-temperature part using a solvent metal as a medium, and carbon is precipitated and grown as diamond on a seed crystal by utilizing the difference in solubility of carbon in the solvent metal due to the temperature gradient. , the cross-sectional shape of the solvent metal is the same as the cross-sectional shape of the target rod-shaped diamond, and the length is at least 1.5 times the equal cross-sectional area diameter. The surfaces of the diamond seed crystals that are placed in contact with each other are <
It can be manufactured by preparing an ili> face, a <100> face, or an <ilo> face.

In the present invention, the artificial rod-shaped diamond (1) as described above is bonded (4) to a support (2) as shown in Figure 3.4.
) are joined by -. To explain this joining means in more detail, a joining material (4) such as a brazing material or a powdered sintered material (4) is embedded in a recess (3) provided at the end of the support body (2) together with an artificial rod-shaped diamond (1). After that, 800~
The artificial rod-shaped diamond is bonded to the support (2) by heat treatment at 1000°C. Figure 3 shows a heavy stone dresser and Figure 4 shows a multi-sided dresser.

Experiments have shown that the lifespan of a 0.5 carat natural diamond dresser and a dresser using the same number of artificial rod-shaped diamonds according to the present invention is 2 to 5 times longer.

According to the present invention as described above, ■t≧1.51. ) and the diamond is long, and if it is polygonal, there is an edge all the way to the end, so it is economical to use the diamond all the way to the end.
@ As mentioned above, the diamond is long and has an uneven surface, so the surface area is large and the bonding strength is increased, so the diamond does not separate from the support during use. >, <1
(0'0>, <i 1o> can be used)
It has the advantages that no skill is required to determine the surface orientation from scratch, that the surface orientation with excellent wear resistance can be easily determined, and that new edges are sure to appear after repeated use.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining a conventional dresser.
a) is a natural diamond;
), (C1, (dl is the artificial rod-shaped diamond Z7 used in the dresser of the present invention. Figures 3 and 4 are both diagrams explaining the dresser of the wooden invention. (al is the plan view, Figure ( bl is a vertical cross-sectional view, and FIG. 5 is a diagram illustrating the method for manufacturing the artificial rod-shaped diamond used in the present invention. (1)...Artificial rod-shaped diamond, (2)...Support , (3)...Concavity, (4)...Joining material f゛6 Agent: Patent attorney Masashi Yoshitake,・Figure 3

Claims (2)

[Claims] (1) The cross-sectional shape is circular, polygonal, or has an irregular shape such as a star shape, and the length is at least 1.5 times the diameter of the equal cross-sectional area, and the length is at least 1.5 times the diameter of the cross-sectional area. A diamond dresser comprising an artificial rod-shaped diamond whose crystal orientation is <111> direction, <100> direction, or <110> direction and whose surface has an uneven surface like ground glass, bonded to a support body. (2) A diamond dresser according to claim (1), which is formed by joining an artificial rod-shaped diamond to a support by heat treatment using a brazing material or a powder sintered material.