JP2004017168A - Laminated rotary grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated rotary grinder which protects a workpiece from being damaged by frictional heat even if meshes of a grinding disk are clogged. <P>SOLUTION: The laminated rotary grinder is characterized by superposing the plurality of flexible thin grinder disks on each other, and interposing heat dissipating layers between the grinder disks. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary polishing tool configured by laminating a plurality of polishing disks.
[0002]
[Prior art]
The laminated rotary polishing tool is used by attaching a plurality of polishing disks to the rotating shaft of a grinder in a state of being superimposed on each other. The polishing disk appears and can be brought into contact with a member to be polished (hereinafter referred to as a work material) with a good polished surface.
[0003]
In addition, the polishing disk of the lamination type rotary polishing tool is formed by impregnating a net-shaped base material with a resin and attaching abrasive grains to the surface of the base material, and the polishing disk has a large number of mesh openings. The frictional heat generated by the polishing operation is radiated through the mesh openings to prevent the work material (steel, cast iron, etc.) from burning.
[0004]
However, when a large number of polishing discs are superimposed, the mesh openings of the polishing discs are blocked by upper and lower polishing discs, and the mesh openings are clogged by grinding dust to lower the cooling performance. In addition, there is a problem that the heat radiation performance is reduced and the work is burned.
[0005]
Therefore, in order to prevent clogging, it is conceivable to increase the opening size of the polishing disc, but the mechanical strength of the rotary polishing tool is reduced, and the content of the abrasive grains is reduced, and the grinding performance is reduced. The problem occurs.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to prevent a workpiece from being damaged by frictional heat even when a mesh opening of a polishing disk is closed. Provide a mold rotary polishing tool.
[0007]
[Means for Solving the Problems]
The stacked rotary polishing tool according to the present invention is characterized in that a plurality of thin flexible polishing disks are stacked, and a heat radiation layer is interposed between the polishing disks.
[0008]
It is preferable that the polishing disk is formed by impregnating a resin made of a fiber cloth with a resin, and attaching abrasive grains to the surface of the substrate with the resin, and providing an air flow hole in the heat dissipation layer.
[0009]
The heat dissipation layer is preferably formed of a metal foil or a plastic sheet having excellent heat dissipation properties.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
As shown in FIG. 1 and FIG. 2, the laminated rotary polishing tool A includes a plurality of flexible thin polishing disks 1 and an aluminum foil 2 (hereinafter abbreviated as aluminum foil). As shown in FIG. 3, a heat dissipation layer 2 </ b> A made of aluminum foil 2 is formed between the polishing disks 1 by overlapping the polishing disks 1. Further, the heat radiation layer 2A may be made of a metal foil having good heat conductivity such as a copper foil or a lead foil instead of the aluminum foil 2, or may be formed using a plastic sheet having good heat conductivity. As a plastic sheet having a good thermal conductivity, for example, a plastic sheet mixed with a metal powder, an aluminum nitride powder or the like may be used.
[0012]
The polishing disk 1 is formed by impregnating and hardening a resin containing abrasive grains (not shown) on a single base material 3 made of a coarse inorganic fiber cloth, as shown in FIG. The resin layer 3A to which the abrasive grains are attached is formed. The mesh opening 4 of the inorganic fiber cloth is set to a size that is not blocked by the resin. A mounting hole 5 is provided at the center of the polishing disk 1, and the center of the polishing disk 1 is bent so that the lower surface side is concave to form a concave portion 6.
[0013]
The method for producing the polishing disk 1 is not particularly limited. For example, a circular base material 3 having a central hole is cut out from an inorganic fiber cloth, and the base material 3 is impregnated with a resin containing abrasive grains. It can be obtained by molding so as to protrude upward. Further, as the inorganic fiber cloth, a glass fiber cloth, a carbon fiber cloth, or the like, which is easily worn, is used.
[0014]
Examples of the weaving method of the inorganic fiber cloth include plain weave, twill weave, and satin, but are not particularly limited. The impregnated resin is a thermosetting resin such as an epoxy resin, a phenol resin, and an unsaturated polyester resin, and the viscosity of the impregnated resin is set to a size that does not leave the resin in the mesh openings 4 of the base material 3. .
[0015]
The aluminum foil 2 is bonded to the polishing disk 1 by an adhesive, but may be bonded by the adhesive force of the impregnated resin. Further, an aluminum foil 2 may be attached to the lower surface of the polishing disk 1.
[0016]
As shown in FIGS. 2 and 3, when the laminated rotary polishing tool A is used by being attached to the rotating shaft B <b> 1 of the grinder B, a plurality of polishing discs 1 are overlapped, and The rotating shaft B1 is inserted, and the screw hole B3 of the lower flange B2 of the grinder B is screwed into the threaded portion B4 of the rotating shaft B1 so that the upper and lower flanges B5 and B2 fixed to the rotating shaft B1 are used for lamination rotary polishing. The tool A is sandwiched and pressed against the upper and lower polishing disks 1 via the aluminum foil 2. The lower flange B2 is housed in the recess 6 of the polishing disk 1, and a reinforcing pad C is provided on the upper surface side of the uppermost polishing disk 1.
[0017]
Since the polishing disk 1 configured as described above is flexible and hard to break, and has a stiffness, the rotary polishing tool A obtained by laminating the polishing disks 1 is adapted to the work D surface as shown in FIG. Good polishing performance can be exhibited.
[0018]
Further, by rotating the rotating shaft B1 of the grinder B in the polishing operation, the frictional heat is radiated by the heat radiation characteristics of the aluminum foil 2, and the work D can be prevented from being damaged by the frictional heat.
[0019]
The aluminum foil 2 is light and flexible, and can follow the flexibility of the polishing disk 1. Further, although the polishing disc 1 is worn down and reduced in diameter by the polishing operation, the aluminum foil 2 is also worn away with it, so that the work D is not damaged by the aluminum foil 2. As a result, it is possible to prevent the work D from being burned or the like without lowering the polishing function by the aluminum foil 2.
[0020]
Moreover, since the aluminum foil 2 is deformed along the unevenness of the surface of the polishing disk 1, even if the aluminum foil 2 is interposed between the polishing disks 1, the polishing disks 1 are firmly engaged with each other via the aluminum foil 2. Can be. That is, even if the aluminum foil 2 is adhered to the surface of the polishing disk 1 in a flat state, the aluminum foil 2 is pressed against the surface of the polishing disk 1 by overlapping and pressing the upper and lower polishing disks 1 as described above. As a result, the surface of the polishing disk 1 is deformed so as to conform to the uneven shape. Therefore, even if the aluminum foil 2 is present, the adhesion between the polishing disks 1 does not decrease.
[0021]
FIG. 5 shows a modified embodiment, in which a large number of small-diameter air circulation holes 7 are provided in the aluminum foil 2 in a scattered manner so that the cooling function by air can be prevented from being lowered.
[0022]
In the illustrated embodiment, the outer diameter of the aluminum foil 2 is set to be slightly smaller than that of the polishing disk 1. However, the outer diameter may be set to be the same as that of the polishing disk 1.
[0023]
FIG. 6 shows another modification, in which a predetermined range of the aluminum foil 2 is colored with a conspicuous color to form a warning portion 8. As the polishing disk 1 wears and becomes smaller in diameter, the lower flange of the grinder may collide with the work D and hinder the polishing operation. In the case of this modified example, when the replacement time of the polishing disk 1 approaches, the warning portion of the aluminum foil 2 is worn and mixed with the polishing waste, so that the polishing operator can be notified visually of the replacement time. . For example, if the polishing disk 1 has an outer diameter of 100 mm, the warning unit 8 is provided in a range of 50 mm to 60 mm in diameter.
[0024]
【The invention's effect】
According to the laminated rotary polishing tool of the present invention, the heat radiation layer is interposed between the polishing disks, so that the frictional heat generated by the polishing operation can be released through the heat radiation layer, thereby damaging the work due to the frictional heat. Can be prevented.
[0025]
In addition, if a metal foil having good thermal conductivity is adopted as the heat dissipation layer, a light and flexible metal foil can follow the flexibility of the polishing disk, and the metal foil is worn away by the polishing operation, so that the heat dissipation layer is used. A decrease in polishing performance can be prevented. In addition, since the metal foil may be cut to a predetermined size and interposed in the polishing disk, it is advantageous in terms of manufacturing cost despite the formation of the heat radiation layer.
[0026]
Further, if the metal foil is provided with an air flow hole, the problem of frictional heat can be more effectively solved by air cooling of the polishing disk.
[Brief description of the drawings]
1A is a plan view of a polishing disk with a metal foil constituting a laminated rotary polishing tool according to an embodiment of the present invention, FIG. 1B is a front view of the polishing disk with a metal foil, and FIG. FIG. 2 is a partially enlarged longitudinal sectional view of a polishing disk with a metal foil.
FIG. 2 is a front view showing an operation of attaching the lamination type rotary polishing tool to a rotary shaft.
FIG. 3 is a front view showing a state in which the laminated rotary polishing tool is attached to a rotating shaft.
FIG. 4 is a side view showing a use state of the laminated rotary polishing tool.
FIG. 5 is a plan view showing a modified embodiment of the laminated rotary polishing tool of the present invention.
FIG. 6 is a plan view showing another modified embodiment of the laminated rotary polishing tool of the present invention.
[Explanation of symbols]
A Laminated rotary polishing tool 1 Polishing disc 2 Aluminum foil (metal foil)
3 Base material 4 Mesh opening

Claims (3)

A laminated rotary polishing tool comprising a plurality of thin flexible polishing disks stacked one on another and a heat dissipation layer interposed between the polishing disks. The polishing disk is formed by impregnating a fiber cloth base material with a resin, and forming abrasive grains by attaching the resin to the surface of the base material, and providing an air flow hole in the heat dissipation layer. The lamination type rotary polishing tool according to claim 1, wherein The lamination type rotary polishing tool according to claim 1, wherein the heat radiation layer is formed of a metal foil or a plastic sheet having excellent heat radiation characteristics.

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