JPS6218376Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention involves mixing abrasive grains such as alumina and carborundum with synthetic resin fibers such as nylon, braiding several of the fibers into a braid that is difficult to unravel, and converging the fibers. The present invention relates to an improvement of a grinding tool in which the weakness of the braid is reinforced with a dry solidifying adhesive so that the tool is suitable for high-speed rotation.

By mixing abrasive grains into nylon filaments and allowing some of the abrasive grains to come out from the surface of the filaments,
Various products using the fibers for polishing and grinding are already known. However, if the filament is a single wire, the grinding surface will be dense, making it difficult to process with tools. Therefore, several strands are braided into a difficult-to-unravel braid, which is held in a clamping bracket, and then ground in various forms. Molded tools are now available. However, synthetic resin fibers are sensitive to heat, so if high temperatures are generated during grinding operations at high speeds, the difficult-to-untie braids will come undone, and when they cool, they will harden in a deformed state, making further handling difficult. There was a drawback.

This idea was developed to compensate for the drawbacks of synthetic resin fibers and maintain a highly accurate grinding surface by adding abrasive grains to the synthetic resin fiber braid of a rotary grinding tool made of synthetic resin fiber braid. , a dry hardening adhesive is applied upward from the metal fitting that supports the braid in a range of about half the length of the braid to harden the braid, and thus the synthetic resin Even if the fiber braid softens due to the high temperatures generated during rotary grinding, the lower half of the braid is hardened, making it difficult to unravel, making it possible to create a grinding tool that does not cause the grinding surface to collapse or break. .

In the embodiment shown in the attached drawings, the materials constituting the rotary grinding tool include synthetic resin fibers 1 and a cross section U.
It is made up of a trough-shaped clamping fitting 2 and a cylinder 3 having a rotating support shaft 4.

The synthetic resin filament 1 has a large amount of abrasive grains 10 mixed therein, and some of the abrasive grains 10 are exposed on the surface of the filament 1, so that the filament 1 can be polished well. It exhibits a grinding effect. The filament 1
In order to increase the elasticity of the fibers, several fibers 1 are braided into a braid 11 as shown in Fig. 2, the braid 11 is cut to a length suitable for grinding, and the cut single material is cut into a length suitable for grinding. A large number of them are bundled together, bent in half approximately at the center, a core wire 20 is passed through the bent portion, and the bent portion is pushed together with the core wire 20 into a trough-shaped metal fitting 2 having a U-shaped cross section, and the opening of the metal fitting 2 is inserted. The braided single material 11 is fixed to the metal fitting 2 by narrowing the edges 21, 21.

The metal fitting 2 is wound around the circumferential surface of the cylinder 3 in a manner that matches the size of the surface to be ground, and the metal fitting 2 is fixed to the cylinder 3 by soldering, welding, etc., to form a cylindrical grinding surface 30. A dry hardening adhesive 5 is applied to a part of the braid 11 forming the ground surface 30 on the side of the metal fitting 2, which is about half the length of the part extending from the metal fitting 2, and the densely packed strings are bonded together. The adhesive 5 is a string 11 that becomes the outside of the metal fitting 2 wound into a cylindrical shape.
It is sufficient to apply it only to the part of the string 11 on the opposite side, but if the reinforcing force is insufficient, apply it also to the part wound inside.

Rubber-based adhesives are acceptable.

The grinding tool of this invention has the above structure, and the braided cord 11 of the grinding fibers exhibits a good polishing and grinding effect by exposing the abrasive grains 10, and the part of the cord 11 attached to the metal fitting 2 Fixation with adhesive is
Even if the fibers 1 are softened due to the high temperature during operation, the braid 11 is prevented from disassociating, and the size of the formed ground surface 30 is not changed.
This made it possible to improve the grinding of the inner surface of the groove, making it a practical rotary grinding tool.

[Brief explanation of the drawing]

Fig. 1 is a side view of a synthetic resin fiber with exposed abrasive grains, Fig. 2 is a side view of a mode in which several of the fibers are braided into a braid, and Fig. 3 is a perspective view of the material for forming a tool according to the present invention. FIG. 4 is a perspective view of the tool of the present invention. 1 is a synthetic resin fiber, 10 is an abrasive grain, 11 is a braid, 2 is a clamping fitting, 3 is a cylinder, 4 is a support shaft, and 5 is a dry solidified adhesive.

Claims (1)

[Scope of utility model registration request] A number of synthetic resin fibers with some of the abrasive grains exposed from the surface are braided into a braid, and the braid is cut to the required length and then folded in half approximately at the center. The curved portion is clamped with a trough-shaped metal fitting having a U-shaped cross section, and the metal fitting is wound and fixed around the cylindrical peripheral surface to form a ground surface by a cylindrical collection of the end faces of the braid, and the clamping metal fitting of the braid is A rotary grinding tool with a dry hardening adhesive applied to the part directly above the clamping part that is approximately half the length of the part protruding from the holder to harden the braid.