JPS59175959A - Grinding tool - Google Patents

Abstract

PURPOSE:To make flexiblity in the widthwise direction stronger and improve the grinding effect of the tool by flatening the filament of synthetic resin, mixed with abrasive grains, into a rectangle. CONSTITUTION:The filaments 3, having flat rectangle in the section thereof, are arrayed and secured to a pinching metal 5, having an U-shaped section, by being pinched, thereafter, the pinching metal 5 is wound around and secured to a rotary body 6. When the pinching metal 5 is wound around and fixed to the peripheral surface of the rotary body 6 having a necessary size, the rotary body 6 is surrounded by a multitude of rectangular filaments 3, 3,... extending radially from the rotary body 6. When a torque is given to the rotary body 6, the circumferential surface 60, formed by the group 3 of the rectangular filaments, and the side surface 61 of the group 3 exhibit the grinding effect.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention uses abrasive grains such as carborundum and alumina oxide to form a synthetic resin 11! ! A large number of the filaments were folded into two, the folded portion was clamped and fixed to a clamping metal fitting having a U-shaped cross section, and the clamping metal fitting was formed into a winding shape for a grinding tool. The present invention relates to an improvement of a grinding tool in which the filaments are formed to have a flat rectangular cross section to improve grinding effectiveness.

Abrasive grains such as carborundum and alumina oxide are mixed in synthetic resin filaments as shown in Figure 2, and a large number of filaments are focused by exposing a portion of the abrasive grains to the surface of the filaments. Or, a method in which several of the filaments are braided into a braided cord shape as shown in Fig. 3 and bundled together and rotated for use in polishing or grinding is disclosed in Patent No. 830307.830308.861.
682, and others. In those conventional methods, if the filament 1 shown in Fig. 2 is made thick, it is hard and difficult to bend, making it difficult to clamp it to the clamping fitting 5 (see Fig. 4). It has become a thing,
However, when it was formed into the shape shown in FIG. 6 and subjected to rotary grinding, each of the filaments 1 was easily bent, and a good grinding effect could not be obtained.

Therefore, several of the filaments 1 are braided into a braid 2 as shown in Figure 6.
were bundled into a shape as shown in Fig. 6 and used for rotary grinding, but since the string 2 was too thick, the clamping fitting 5 could not be made thinner, and the grinding tool could not be made smaller. .

From this point of view, the present invention replaces the conventional filament 1 with the first one.
As shown in the figure, the wires 3 are formed into a rectangular shape with a flat cross section, and the wires are arranged to a specific length and clamped and fixed to clamping fittings 5 whose cross section is U-shaped as shown in Figure 4. It is characterized in that the metal fitting 5 is wrapped around and fixed to a rotating body, and thus the rectangular filament 3 is easily bent in the direction of its thickness, like the conventional filament 1, but rigid in the direction of its width. It is difficult to bend because it is thick, and this property makes it easy to insert and clamp the clamping metal fitting 5 into a narrow gap as shown in Fig. 4, but it also strengthens the flexibility of the rectangular wire 3 in the longitudinal direction of the metal fitting 5. Therefore, the metal fitting 5 is made rigid.
When wrapping and fixing to the rotating body 6 as shown in the figure, the circumferential surface 6
The grinding ability on the 0 and side surfaces 61 was significantly improved, and a tool with excellent grinding efficiency could be obtained.

In the embodiment shown in Fig. 4.6 of the attached drawings, the synthetic resin filament 3 for grinding is made by mixing abrasive grains 60 such as carborundum or alumina oxide in a synthetic resin filament such as nylon. A part of the grain 30 is exposed on the surface of the filament 30,
The filament 3 is formed into a rectangular shape with a flat cross section. The condition for the rectangle is that the width is about three times the thickness of the filament A. If the width is too thick, the metal fitting 5 that clamps the filament 6 will fold as shown in Figure 6. Since this will cause trouble in bending, it is best to use a shell of about 3mm or more, and the nominal thickness should be 05mm or thicker.

A large number of rectangular filaments 3 having the above configuration with appropriate lengths are arranged in parallel, a core wire 4 is placed in the center of the filament 3, the filament 3 is bent in half, and the core wire 4 is inserted into the bent portion. The bent portion is pushed into the clamping fitting 5 having a U-shaped cross section, and the fitting 50 is
When fixing the rectangular filament 6 in the metal fitting 5 by pinching the mouth cap 50 from both left and right sides, the large number of rectangular filament 6 groups are
As shown in the figure, the width direction of each single filament 6 is facing the same direction, and the metal fittings 5
It is clamped and fixed.

When the clamping fitting 5 is wrapped and fixed around the circumferential surface of a rotating body 60 of a required size as shown in FIG. 6, the rotating body 6 also has a large number of rectangular filaments 3. When the shaft 62 of the rotating body 6 is attached to a rotating machine as appropriate and rotation is given to the rotating body B in the direction of the arrow, the circumferential surface 60 formed by the rectangular wire group 3 and its The side surface 61 exhibits a strong grinding effect. Especially rectangular filament 3
strongly repels bending in the width direction,
Its grinding effect is strong.

When the rectangular filament 3 is to be clamped to the clamping fitting 5, the two and three filaments 60 stacked together are bent in half, and the bent portion is clamped to the clamping bracket 5. That's fine, but
Such a clamping method may result in irregularities such as doubly overlapping or triple overlapping parts of the rectangular filament 3, and the size of the metal fitting 5 must also be increased. It cannot be called a method. Therefore, the strongest clamping can be obtained by arranging the rectangular filaments 6 one by one.
However, in the case of such clamping, when the metal fitting 5 is wound around a rotary body B having a small diameter, the tips of the rectangular filaments 3, 3, 3, . In this case, even if the ℃・Kanichonosugi filament 6 is strong against bending in the width direction, it will not bend easily in the thickness direction, so its oil force will cause it to sway in the direction where it is easy to bend. This may cause vibration and reduce the grinding effectiveness. Therefore, the rectangular line 6
Mix the round filament 1.1... shown in Figure 2 with a thickness that matches the thickness of the rectangular filament 3 into the parallel filament 5.
As shown in the figure, the bent part, which has been semi-analyzed so as to straddle the core wire 7, is clamped and fixed with clamping fittings 8 having a U-shaped cross section, and the fittings 8 are wrapped and fixed around a cylindrical rotating body 9 as shown in Fig. 7. When the rectangular filament is 3, the opening of the tip is ℃, and the round filament is 1.1.
. . exists, the above-mentioned swinging of the rectangular filament 3 in the thickness direction is considerably prevented, and therefore there is no risk of reducing the grinding effectiveness.

The braid 2 shown in FIG. 3 is made by braiding several round filaments 1 into a braid as described above, and the knitted cord is much more flexible than that of a single round filament 1. However, this is not comparable to the strength of the rectangular filaments 3 in the width direction, but if the braid 2 is mixed with the rectangular filament group instead of the round filament 1 in the previous example (Fig. 5). Since the flexibility of the braid 2 is quite strong, the flexibility in the thickness direction of the rectangular filament 6 can be reinforced when clamping it to the metal fittings 8. When forming the tool, it has the advantage that the grinding effect on the side surface of the tool (the part corresponding to the reference numeral 61 in FIG. 6) can be greatly improved.

As described above, in the grinding tool of the present invention, by making the synthetic resin filament 3 mixed with abrasive grains into a flat rectangular shape, the flexibility in the width direction can be made strong. It was possible to improve the grinding efficiency without interfering with the clamping process to the metal fitting 5, making it possible to provide an excellent grinding tool.

[Brief explanation of the drawing]

The attached drawings show embodiments of the grinding tool of the present invention, in which Figure 1 is a perspective view of the synthetic resin filament of the present invention, Figure 2 is a perspective view of a conventional synthetic resin filament, and Figure 3 is a perspective view of the same filament. Fig. 4 is a perspective view of a braided cord made up of several strands, Fig. 4 is a perspective view of the grinding tool material of the present invention, and Fig. 5
The figure is a perspective view of the second embodiment, FIG. 6 is a perspective view of the first embodiment of the grinding tool of the present invention, and FIG. 7 is a perspective view of the second embodiment. 1 is a round filament, 2 is a braided cord, 6 is a rectangular filament, 60 is an abrasive grain, 4.7 is a core wire, 5.8 is a clamping metal fitting, 6.9 is a rotating body,
60 is a circumferentially ground surface, and 61 is a side surface. Patent applicant Shinsaki Shinsaki & + Sanbe agent Shin Wei Sekiya):
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Claims (1)

[Claims] (1) A synthetic resin filament in which abrasive grains such as carborundum and alumina oxide are mixed and a part of the abrasive grains are exposed on the surface is formed into a flat rectangular cross section; A large number of strips of a specific length are arranged in parallel, the strips are bent at the center of the y, a core wire is applied to the bent portion, and the bent portion is clamped together with the core wire in a U-shaped cross section. A grinding tool that is clamped and fixed to a metal fitting, and the clamped metal fitting is wrapped and fixed around the circumferential surface of a cylindrical rotating body. ■A synthetic resin filament mixed with abrasive grains such as carborundum and alumina oxide, with some of the abrasive grains exposed on the surface, is formed into a flat rectangular cross section, and the filament has a specific length. A large number of circular filaments with a circular cross section made of the same material as the filament are laid out in the parallel line, and these are bent at approximately the center of the filament. A core wire is applied to the portion, the bent portion is clamped and fixed together with the core wire to a clamping metal fitting having a U-shaped cross section, and the clamping metal fitting is wound and fixed around the circumferential surface of a cylindrical rotating body. Grinding tools listed in item. ■A synthetic resin filament mixed with abrasive grains such as carporundum and alumina oxide, with some of the abrasive grains exposed on the surface, is formed into a flat rectangular cross section, and the filament has a specific length. A large number of wires are arranged in parallel, and within the row, a large number of round wires made of the same material as the wires and having a circular cross section are laid out in a braided manner. The core wire is bent at the center of the main body, the core wire is exposed at the bent portion, the bent portion is clamped and fixed together with the core wire to a clamping metal fitting having a U-shaped cross section, and the clamping metal fitting is attached to the circumference of the cylindrical rotating body. The grinding tool according to the first and second claims, which is wound and fixed on a surface.