JPH045252Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an abrasive tool for polishing relatively fine details of hard and brittle materials such as stone or general metals.

(Prior art) For example, when polishing a concave part (such as the cap of an Olympic pagoda or a part called astragalus) or a convex part (such as the head of a tombstone) of an inorganic material such as stone, conventionally, a Witlifide whetstone, a porous Resinoid grindstones were used either dry or wet. However, when polishing a curved surface of a workpiece, the grindstone does not have elasticity, so it has poor adhesion to the curved surface, and it is difficult to apply a constant processing pressure during polishing, resulting in poor workability. Although it took a long time to complete, the finish was poor.

Particularly in the case of Witlifide grindstones, it is difficult to impart flexibility to the grindstones, and they are brittle, making them difficult to use for work on curved surfaces.

(Problems to be solved by the invention) In view of the problems of the prior art, 1) even if the workpiece has a curved surface, machining along this curved surface is easy, and 2) conventional dry rough machining The purpose of the present invention is to provide a polishing tool that allows the polishing tool to be replaced with a wet polishing tool.

(Solution by invention) A cylindrical abrasive grain group created by filling a mold with a plurality of concentrically arranged small holes with a Vitrifide mixed powder containing diamond or CBN abrasive grains and baking it. The grindstone portion was impregnated with a flexible resin and integrally bonded to a flexible base material, and a hook-and-loop fastener was bonded to the back surface of the base material to provide flexibility as a whole.

(Function) Attach to a fixture attached to a power tool, etc. via a hook-and-loop fastener and rotate. Then, the polishing action is performed by the cylindrical grindstone grains arranged concentrically, but at this time, since the grindstone grains are integrally bonded to the flexible base material, the workpiece has a curved surface. The base material also bends along the curved surface, making it easy and efficient to polish the curved surface.

(Example) This will be explained based on the drawings. A is a polishing tool according to the present invention. 1 is a cylindrical abrasive grain, which is made by filling a mold with a plurality of small holes arranged in concentric circles with a Vitrifide mixed powder containing diamond or cubic boron nitride (CBN) abrasive grains, and then firing it.

The other 2 is a flexible substrate impregnated with a thermosetting resin, such as artificial leather. The grindstone grain 1
... and the base material 2 constitute a grindstone portion.

Now, in order to integrally attach the grindstone grains 1 on the base material 2, the base material 2 is impregnated with a thermosetting resin, and the sintered grindstone grains 1 are stacked on top of the base material 2, and then heated. As a result, the thermosetting resin is cured and the abrasive grains 1 are integrally bonded to the base material 2 at the same time.

Once the grindstone portion is constructed in this way, the hook-and-loop fastener 3 is adhered to the back surface of the hardened base material 2 while maintaining its flexibility. During processing, the surface fastener 3 is attached to a fastener on the side of a fixture 4 (FIG. 3) attached to the output shaft of an electric tool (or air tool) or the like.

Figure 3 shows an example in which the polishing tool A of the present invention is used for rough polishing the curved parts of the fire ring a and water ring b of the Olympic Tower, and the concave surface of the fire ring a and the convex surface of the water ring b are Since it has flexibility, it can be polished without difficulty.

Figure 4 shows the state in which the chamfered portions of the four circumferential edges of the top of the prismatic stone tower c are being polished. Even if the curvature is relatively small, the flexibility of the grindstone tool A creates a beautiful surface as shown in Figure 5. It is possible to polish the cut-out part.

FIG. 6 shows a columnar stone tower having a semicircular top, and even such a stone tower can be polished by the polishing tool A of the present invention.

(Effects) Since the Vitrifide diamond polishing tool can be made flexible, it is possible to easily machine curved surfaces on the workpiece.

By using the polishing tool of this invention, rough machining that was conventionally done using a dry method can be replaced with a wet method, which prevents wear caused by heat during dry processing, reduces machining man-hours, and saves work time. It became possible to shorten the time.

Furthermore, it has become possible to improve the poor working environment caused by dust, which was a problem during dry work.

When polishing with an abrasive tool, the grindstone grains arranged on the outer periphery wear out first, so if the outer periphery loses its ability to grind, it is possible to cut it out, and it remains in good condition for a long time. It is possible to maintain good grindability.

Incidentally, polishing the Olympic Tower shown in Figure 3, which would have taken 4 hours using the conventional method, can be done in about 1.5 hours using the tool of the present invention.

Furthermore, in the case of polishing as shown in Fig. 4, the polishing process that conventionally required 1.5 hours can be completed in about 40 minutes, demonstrating the excellent workability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the polishing tool. Figure 2 is also a plan view. Figure 3 shows the state in which the curved surface of the Olympic Tower is being polished. Figure 4 shows the four circumferences of the top of the columnar stone tower being polished. FIG. 5 is a top perspective view of FIG. 4. FIG. 6 is a perspective view of a stone tower with a circular top. In the figure, A...Abrasive tool, a...Fire ring, b
... Water ring, 1 ... Grindstone grain, 2 ... Base material, 3 ... Surface fastener, 4 ... Fixture.

Claims (1)

[Scope of utility model registration request] A cylindrical abrasive grain group arranged in concentric circles is created by filling a mold with a plurality of small holes arranged in concentric circles with a Vitrifide mixed powder containing diamond or cubic boron nitride abrasive grains, and firing it. A whetstone part impregnated with thermosetting resin and integrally bonded to a flexible circular base material;
A Witlified diamond polishing tool having flexibility for polishing stone, comprising a hook-and-loop fastener bonded to the back surface of the base material.