JPH0710501B2 - Diamond grinding wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a so-called flat type diamond grinding wheel mainly used for re-polishing a super hard circular saw (tip saw).

[Conventional technology]

Conventionally, as this kind of diamond grinding wheel, as shown in FIG. 8, a diamond grinding wheel part is formed on the edge surface of a peripheral edge portion 2 of a base metal 1 made of aluminum or iron alloy, etc. Generally, the abrasive grain layer 3 containing grains is fixed.

And this diamond grinding wheel has a central shaft hole 4 of the base metal 1.
It is mounted vertically on the grindstone shaft (not shown) of the grinding machine at the part of
5 is used for re-polishing.

[Problems to be solved by the invention]

By the way, in the conventional diamond grinding wheel, as shown in FIG. 9, a cemented circular saw (tip saw) 5 horizontally arranged is reciprocally moved with respect to the abrasive grain layer 3 of the grinding wheel that is rotating vertically, and the tip 6 is moved. In the case of a carbide circular saw (tip saw) with a narrow blade bottom 7 and a fine pitch, the base metal 1
The tip 6a of the blade and the bottom 8 of the blade hit the tip 6
It is not possible to polish the entire chip 6 by only polishing a portion of the diamond wheel, and at the time of polishing, the base metal 1 of the grinding wheel is pushed and bent from the back surface and the diamond abrasive grain layer 3 is peeled from the base metal 1. However, there was a danger that the fragments would scatter around at high speed.

The present invention has been made in view of such problems of the conventional technology, and the purpose thereof is to provide a carbide round saw (tip saw) having a narrow blade bottom and a fine pitch,
The entire tip can be easily and accurately ground, and the tip of the base metal and the bottom of the blade do not hit each other during polishing, so there is no accidental peeling of the diamond abrasive grain layer and the stone is destroyed. It is to provide a diamond grinding wheel that is excellent in prevention and durability.

[Means for solving problems]

In order to achieve this object, according to the present invention, a rim disc made of steel, special steel or the like is projectingly fixed to the peripheral edge of one surface of a base metal, and a diamond (natural diamond) is attached to the peripheral edge of the rim disc. , Synthetic), an abrasive grain layer containing abrasive grains is fixed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings together with the operation thereof.

FIG. 1 is a plan view of an example of a diamond grinding wheel according to the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of the same. In these figures, a metal base metal 10 of iron or the like is a substantially inverted base. Presents a shape,
A shaft hole 11 is provided at the center thereof.

The doughnut-shaped rim disk 13 made of steel, special steel or phosphor bronze and having a required plate thickness is provided on the stepped portion 12 having an L-shaped cross section around the periphery of the surface of the base metal 10 having a large surface area. The surface of the base metal 10 is matched with the surface of the base metal, and the U-shaped notches 15 are regularly provided around the base metal at regular intervals.
10a is projected outward by a required amount and is fitted horizontally, and the peripheral portion of the rim disk 13 and the base metal 10 are overlapped with each other at an appropriate position (preferably the back side of the base metal 10 has a short side and a hypotenuse). A plurality of fixing screws 16 that are fixed from the rim disc 13 side
Are fixed integrally by the rim disk 13, and further, a diamond (natural or synthetic) is formed on the tip 14 of the peripheral edge of the rim disk 13 as a grindstone portion.
Abrasive grain layer 17 containing abrasive grains has a U-shaped notch 15 with a predetermined thickness.
And the lower surface thereof is flush with the lower surface of the peripheral edge end portion 14 by a known means such as electrodeposition, and the contact area is increased by the U-shaped notch 15 so as to be integrated. , Firmly fixed.

In addition, the fixing of the rim disc 13 to the base metal 10 should be done with the stop screw 16
In addition to the above, it is also possible to fix by spot welding 18 as shown in FIG.

The diamond grinding wheel configured as described above is mounted vertically to the grinding wheel shaft (not shown) of the grinder at the shaft hole 11 centered on the base metal, and the abrasive grain layer 17 is rotated by high speed rotation.
Used for polishing the tip 6 of the super hard circular saw (tip saw) 5.

〔The invention's effect〕

Thus, according to the present invention, the abrasive grain layer 17 that becomes the grindstone portion
Is a thin rim disc 13 that sticks out horizontally to the base metal 10 and is fixed.
Since the U-shaped cutout portion 15 is embedded in the outer periphery of the peripheral edge tip portion 14 and the lower surface thereof is integrally fixed so as to be flush with the lower surface of the peripheral edge tip portion 14, the abrasive grains The thickness of the protruding portion of the rim disk 13 including the layer 17 from the base metal 10 is thin, and therefore, it is difficult to polish with a conventional grinding wheel. The entire surface of the tip of the (tip saw) can be easily polished, and since the rim disk 13 is projected and fixed from the base metal 10, the tip 10a of the base metal 10 and the blade bottom portion 8 do not hit each other during polishing. There is no accident of pushing the gold 10 from the back surface and peeling the abrasive grain layer 17 from the base metal 10.

Further, the rim disc 13 is made of steel, special steel or phosphor bronze and has elasticity, and the strength of the rim disc 13 at the time of polishing depends on the protrusion amount of the rim disc 13 from the base metal tip 10a. Since it can be set appropriately according to the thickness of the rim disc 13, the impact of the grindstone surface (abrasive grain layer surface) during polishing is softened, the surface is fine, and the finishing surface is fine, allowing highly accurate polishing. It has excellent industrial value such as being capable.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a diamond grinding wheel according to the present invention with a part omitted, FIG. 2 is a sectional view taken along line II-II of the same as above, and FIG. 3 is a rim disk and abrasive grains. FIG. 4 is a perspective view showing a fixed state with layers, FIG. 4 is a sectional view taken along line IV-IV of the same as above, FIG.
FIG. 6 is a sectional view taken along line VV in FIG. 3, FIG. 6 is a sectional view showing another example of the present invention, FIG. 7 is an explanatory view of a polished state, FIG. 8 is a sectional view showing a conventional example, FIG. 9 is an explanatory diagram of a polished state according to a conventional example. 10 …… Base metal 10a …… Base metal tip 11 …… Shaft hole 13 …… Rim disk 14 …… Peripheral tip 17 …… Diamond abrasive grain layer

Claims (1)

[Claims] 1. A substantially inverted trapezoidal base metal 10 having a shaft hole 11 in the center.
At the outer peripheral edge of the surface having a large surface area, a donut-shaped rim disc 13 made of steel or special steel is projected horizontally from the base metal tip 10a with a peripheral edge tip 14 around which a U-shaped notch 15 is provided. And is fixed so as to be flush with the upper surface of the base metal, and an abrasive grain layer 17 containing diamond abrasive grains is provided on the outer periphery of the peripheral edge tip portion 14 of the rim disc 13 in a U-shaped notch portion 15. The diamond grinding wheel is characterized in that it is integrally fixed so that the lower surface thereof is flush with the lower surface of the peripheral edge tip portion 14 and is flush with the lower surface.