JPH0357426Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a polishing wheel used for polishing the surfaces of objects to be polished such as metals and for grinding away epoxy resin paint applied to concrete road surfaces. .

(Prior art) Conventionally, as a polishing wheel for polishing the surface of an object to be polished such as metal or concrete, a large number of rectangular abrasive pieces such as sandpaper are planted and fixed in a radial manner on the outer periphery of a wheel disk. A type of polishing device in which the surface to be polished is polished at the end face is known. This type of polishing wheel polishes by rotating radial abrasive pieces, so if the number of radial abrasive pieces is not that large and the planting density is relatively coarse, the chips produced during polishing may become clogged. In addition, since the air flows outward through the space between each polishing piece, there is less worry about the surface to be polished being air-cooled and burning, and the outflow of air causes the polishing wheel to be vacuum-adsorbed to the surface to be polished. Therefore, the hand grinder had advantages such as good operability.

However, when polishing rust or scratches on objects with concave or curved surfaces, or when removing resin paint from concrete surfaces, the density of the abrasive chips needs to be high. The above advantages cannot be fully demonstrated, and in fact, the abrasive grains are less likely to break.
The cutting edge of the abrasive grains becomes increasingly worn and generates more heat, and the high temperature causes the chips to melt and fill the pores, creating a condition called loading, resulting in extremely poor cutting performance. This may cause deep scratches on the finished surface, or the cutting edge may not grow naturally.
There were various drawbacks such as the surface of the polishing piece being shiny, chattering, and heat generation causing polishing burns and polishing cracks on the surface of the object to be polished.

(Technical Issue) Therefore, this invention aims to improve the elasticity, flexibility and durability of each polishing piece during rotation, and prevents clogging and spillage, thereby preventing polishing burns and polishing cracks.
The technical problem is to obtain a beautiful mirror finish without scratches.

(Technical Means) This invention was made to solve the above-mentioned technical means, and the drawing examples will be described below.

First, 1 is made of a rectangular abrasive cloth, sandpaper, etc., and is made into a curtain shape (Figs. 1, 2 and 5A) or a comb-shaped (or finger-shaped) abrasive piece formed by the notch holes 3 (FIGS. 3, 4, and 5). Therefore, this invention is based on the above structure. The polishing pieces 1 are placed on the outer periphery of the wheel disk 5 in a radial manner in a series of a large number of annular blocks (Figs. 1 and 2) or in a plurality of blocks A.
They are arranged in a plurality of divided shapes (Figs. 3 and 4) and fixed with adhesive or the like. In addition, the above 3rd,
In the case of the embodiment shown in FIG. 4, an appropriate support spacer may be inserted into the gap between each of the divided blocks A. Further, on the abrasive grain surface of each polishing piece 1 of the polishing wheel configured as above,
As shown in FIGS. 1 to 4, when an anti-clogging agent 6 made of a release agent such as silicone, Teflon, or urethane resin is coated by spraying, coating, or dipping, it is effective in preventing clogging. be. The polishing wheel configured as described above is attached to the disc grinder through the shaft hole 4 of the wheel disc 5, and the polishing cloth 1 in the form of an annular or multi-segmented block is installed in the disc grinder through the shaft hole 4 of the wheel disc 5.
The protruding end surface of the bundle group is used as a polishing surface.

(Effect) As mentioned above, in this invention, a plurality of cut strips 2 are cut at small intervals from the upper edge so as to leave the lower edge 1a.
Alternatively, using the polishing piece 1 formed in the shape of a curtain or comb by the notches 3, apply it to the outer periphery of the wheel disk 5 in the form of a plurality of radial series of annular or plural blocks. Therefore, each polishing piece 1 has a plurality of finger fin pieces formed by cut lines 2 or cut holes 3, respectively, and rotates in the direction of rotation during polishing, that is, in the circumferential direction. It has remarkable flexibility, bendability, and durability against the pressing force applied in Each abrasive piece 1 induces a swirling flow of air in the rotating circumferential direction through its respective slits 2 or cut holes 3 to assist in heat dissipation and heat generation suppression, thereby preventing clogging and spillage. By preventing this, it is possible to easily polish a beautiful mirror surface without cracking, burning, or scratches, which is an outstanding effect.

[Brief explanation of the drawing]

Figure 1 is a plan view of the first embodiment of this invention;
3 is a plan view of the second embodiment, FIG. 4 is a longitudinal sectional front view of the same, and FIGS. 5A to 5E are front views of the polishing piece embodiment. 1... Polished piece, 1a... Lower edge, 2... Cut strip,
3... Cut hole, 4... Shaft hole, 5... Wheel disk, 6... Anti-clogging agent, A... Multiple blocks.

Claims (1)

[Scope of utility model registration request] An abrasive piece made of a rectangular abrasive cloth or the like and formed into a curtain or comb shape by having a plurality of notches 2 or holes 3 cut at small intervals so as to leave a lower edge 1a from the upper edge of the abrasive cloth. 1 are arranged and fixed radially on the outer peripheral edge of a wheel disk 5 in a plurality of annular shapes or in a plurality of divided blocks.