JPH0557626A - Polishing tool - Google Patents

Abstract

PURPOSE:To provide a polishing tool of long life with which an object to be polished can be polished by contact of low pressing force and also the bottom of a hole of small diameter can be polished. CONSTITUTION:An abrasive grain layer is formed on the surface of a narrow tablet-like body 7 made of resin film as base material by fixing and knealing abrasive grains 8 onto the surface, and a plurality of those tablet-like bodies are radially planted on the circumferential face of a core shaft 1 so as to form an impeller like tool main body. Hereby, flexibility of the tablet-like body 7 can be appropriately adjusted by making its thickness thin, and the life of the tool main body can be lengthened due to its high strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool for polishing the surface of a mold, sheet metal or the like.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory view showing a conventional polishing tool made of a polishing cloth with a shaft. In the figure, 1 is a shaft core. A knurled portion 2 is formed at the tip of the shaft core 1. Then, the knurled portion 2 of the shaft core 1 through the upper flange 3
Is inserted into the abrasive cloth paper 4, the knurled portion 2 is adhered to the abrasive cloth paper 4 with the adhesive 9, and then the lower flange 5 is adhered to the abrasive cloth paper 4 to attach the shaft core 1 and the abrasive cloth paper 4 to each other. Installation is done.

In the polishing tool thus constructed, as shown in FIG. 5, a polishing cloth paper 4 cut in a strip shape has a shaft core 1 as a roll.
It is firmly fixed to the let portion 2 with an adhesive 9.
The upper flange 3 and the lower flange 5 prevent the abrasive cloth 4 from falling off. The threaded portion 10 formed on the other end of the shaft core 1 is inserted into a rotary drive tool (not shown), and rotational energy is transmitted from the rotary drive tool to vigorously rotate the polishing tool and The polishing body 6 is polished.

Incidentally, FIG. 6 shows a conventional polishing tool made of a cylindrical polishing cloth. In the case of this polishing tool, the to-be-polished body 6 is polished by using the R portion at the tip and the side surface portion.

[0005]

Such a conventional polishing tool is a paper having a high strength, which is generally called a polishing paper.
Or a water resistant paper that does not break even if it gets wet
What is called is used as abrasive cloth paper. Since such an abrasive cloth paper is very strong, it has to be pressed strongly against the curved surface of the object to be abraded, and a large amount of energy was required to rotate and drive the abrasive tool body.

Further, when the polishing cloth paper is not in contact with the object to be polished in a parallel state, there is a problem that unevenness occurs on the polishing surface due to uneven contact of the polishing cloth paper. Moreover, conventional polishing tools have been unsuitable for polishing small diameter hole bottoms.

The present invention has been made in view of the above points. It is possible to polish an object to be polished by bringing a polishing tool into contact with the object to be polished with a low pressing force and to polish a hole bottom having a small diameter. Moreover, it provides a polishing tool having a long life.

[0008]

The present invention provides a plurality of strips made of a resin film having an abrasive grain layer formed on the surface thereof.
The polishing tool is characterized in that an impeller-shaped tool body is formed by radially arranging on the peripheral surface of the shaft core.

Further, according to the present invention, in the above polishing tool, the strip body is formed of a sponge-like or fibrous elastic body, and the abrasive grain layer is coated or impregnated with the abrasive grains in the surface region of the elastic body and kneaded. It is formed by inclusion.

[0010]

In the polishing tool of the present invention, the abrasive grains are fixed or kneaded into the surface of the strip of resin film to form the abrasive grain layer. Therefore, the strip itself is very soft and has a high abrasion strength, and is very easy to fit to the curved surface of the object to be polished.

Further, a strip body is formed of a fibrous or sponge elastic body, and abrasive grains are impregnated or kneaded into the surface or inside thereof to form an abrasive grain layer. For this reason, it is possible to easily insert into a deep hole and follow the surface to be polished, and it is possible to easily polish the deep hole.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a polishing tool according to an embodiment of the present invention, and FIG. 2 is a front view of the same embodiment. The same parts as those of the conventional one shown in FIG. 5 are designated by the same reference numerals. That is, reference numeral 1 in the drawing is a shaft core having a knurled portion 2 formed at the tip thereof. A plurality of strips 7 made of a resin film are fixed to the peripheral surface of the shaft core 1 with an adhesive 9. As this resin film, a film made of a chemically synthetic resin such as polyester, polyimide (for example, nylon), or tetrafluoroethylene (for example, Teflon) can be used.

In the surface area of the strip 7, an abrasive grain layer is formed by coating, impregnating, and kneading the abrasive grains 8 made of alumina, diamond, zirconia, or the like. The strip 7 is fixed on the shaft core 1 with an adhesive 9 to form an impeller-shaped tool body, and is prevented from coming off the shaft core 1 by an upper flange 3 and a lower flange 5.

The tip portion 10 of the shaft core 1 is screwed and fixed to a rotary drive tool (not shown) by a screw portion.

In the polishing tool thus constructed, since the strip 7 is formed of a resin film such as polyester, it is very soft and can be easily conformed to the curved surface of the object to be polished. Therefore, it is possible to polish the object to be polished in a highly finished state along the curved surface of the object to be polished, and to extend the life of the polishing tool because of the strength of the strip 7.

As a polishing tool of another embodiment of the present invention, as shown in FIG. 3, a strip 11 formed of a sponge-like or fibrous elastic body may be adopted. Strip 11
The other structure is the same as that of the above-mentioned embodiment.

In the polishing tool of the present invention, since the strip 11 is made of an elastic material, the strip 11 fits well into the groove or R portion of the workpiece 6 as shown in FIG. can do.

Further, in the polishing tool according to the present invention, since the strip 7 is very soft, it can be easily adapted to the curved surface of the free-form object 6 to be polished as shown in FIG.

In the embodiment, the threaded portion 10 is provided at the tip of the shaft core 1. However, there is no threaded portion 10 other than this, and the driving tool is held by a collet chuck or a drill chuck. What is fixed may be adopted.

[0020]

As described above, according to the polishing tool of the present invention, the polishing tool can be brought into contact with the object to be polished with a low pressing force and the bottom of a hole having a small diameter can be polished. In addition, it has a remarkable effect such as a long life.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a polishing tool according to an embodiment of the present invention.

FIG. 2 is a front view of the same embodiment.

FIG. 3 is a perspective view of another embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a usage state of the polishing tool of FIG. 1.

FIG. 5 is an explanatory view of a conventional polishing tool made of a polishing cloth with a shaft.

FIG. 6 is an explanatory view of a conventional polishing tool in which a polishing cloth paper is manufactured in a columnar shape.

[Explanation of symbols]

 1 Shaft Core 2 Rollet Part 3 Upper Flange 5 Lower Flange 6 Object to be Polished 7 Striped Body 8 Abrasive Grain 9 Adhesive 10 is Threaded Part

Claims (2)

[Claims] 1. An impeller-shaped tool body is formed by radially arranging a plurality of strips made of a resin film having an abrasive grain layer formed on the surface thereof, radially on the peripheral surface of the shaft core. And polishing tools. 2. The strip body is formed of a sponge-like or fibrous elastic body, and the abrasive grain layer is formed by applying, impregnating, or kneading abrasive grains on the surface region of the elastic body. The polishing tool according to claim 1, wherein: