JPH0718527Y2 - Polishing tool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool in which a disk-shaped substrate is adhered and fixed to the back surface of an abrasive made of abrasive cloth paper.

[0002]

2. Description of the Related Art A conventional polishing tool in which a wheel substrate and an abrasive are combined is, for example, an actual flat blade 1-114.
No. 273 is disclosed.

In this polishing tool, a large number of pieces of abrasive cloth paper having abrasive grains adhered to the surface of a sheet material are radially arranged on a disk-shaped base (wheel substrate) and to the base. It is configured by adhering and fixing while being inclined at right angles or inclined.

The polishing tool having such a structure can be used for polishing work by being attached to a rotary shaft of a hand grinder, rotated, and pressed against a polishing surface of a workpiece.

In such a polishing tool, the abrasive cloth paper piece is pressed against the workpiece during polishing, and thus falls in the direction of rotation thereof, but since it has a restoring force, it is located at the corner portion of the workpiece. In this case, the abrasive cloth paper piece just before passing is strongly pressed against the corner portion by the restoring force.

For this reason, the corners of the work piece are strongly polished and the corners are blunted. Also, when polishing the bead of welding, there is also a problem that the polishing cloth paper is pressed against the non-welded portion by the restoring force acting on the abrasive cloth paper piece as described above and the non-welded portion is ground. .

Further, since the fine abrasive powder and the abrasive particles detached from the abrasive cloth paper during polishing enter between the subsequent abrasive cloth paper piece and the work piece and there is no escape, there is no clogging of the abrasive cloth paper piece. Occurs and the polishing effect is significantly reduced.

Further, since the abrasive cloth paper pieces cut into a predetermined size are arranged radially, and each abrasive cloth paper piece is adhered and fixed, there is a problem that the labor is remarkably time-consuming, the productivity is lowered, and the cost is increased.

In view of this, the present invention can suppress the occurrence of corner sag of a workpiece and can polish along a boundary between a polished portion and a non-polished portion, and can also improve polishing efficiency, mass productivity and impact resistance. A polishing tool having excellent properties is provided.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a circular shape having a through hole in the center and a large number of radial shapes so as to leave a connecting portion by connecting to at least one of the peripheral portions. On the back surface of the abrasive formed by laminating a plurality of abrasive cloth paper having a notch and a circular net having a through hole at the center and adhering them to each other, a disk-shaped substrate having a through hole at the center is formed. A polishing tool was constructed by adhesive fixing.

[0011]

[Function] When the polishing tool is attached to the rotary shaft of the hand grinder and rotated, and the polishing material on the surface of the polishing tool is pressed against the object to be polished or ground, the polishing fine powder and polishing are accompanied by the polishing. The abrasive grains that have separated from the material fit into the gaps between the cuts, and then are scattered outward from the outer ends of the cuts by the centrifugal force generated by the rotation of the polishing tool.

When the polishing cloth on the surface of the abrasive material is worn away while the polishing is in progress, the net of the next layer is exposed, and when the exposed net is worn away, the polishing cloth of the next layer is exposed.

Further, the abrasive cloth paper is reinforced by a net provided in each subsequent layer.

[0014]

Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a disc-shaped abrasive cloth 1 having a large number of radial cuts 3 so as to leave a connecting portion 2 at the inner peripheral edge.

The abrasive cloth paper 1 has a through hole at its center.

FIG. 2 shows a net 4 having a through hole in the center.

The net 4 may be a knitted net to which abrasive grains for adhering are fixed.

FIG. 3 shows an abrasive 5 in which abrasive cloth paper 1 and net 4 are alternately adhered and stacked to be integrated.

The abrasive 5 has a through hole at its center (not shown).

Although FIG. 3 shows an embodiment in which three abrasive cloth papers 1 and two nets 4 are alternately stacked, the number of abrasive cloth papers 1 and the nets 4 and the overlapping condition. Are not particularly limited, and they may not overlap alternately.

In the embodiment, the cuts 3 of the laminated abrasive cloth 1 are arranged on the same straight line.

As shown in FIGS. 4 and 5, the abrasive 5 is fixed to the surface of a disk-shaped substrate 7 having a through hole 8 at the center with an adhesive 6.

The substrate 7 is made of abrasive cloth paper or non-woven fabric and is highly flexible.

Further, by fixing the abrasive particles to the substrate 7, the substrate 7 can be used as an abrasive after the abrasive 5 has been abraded.

As shown in FIG. 5, the central part of the polishing tool may be formed so as to bulge out in a bowl shape in the surface direction of the substrate 7 when they are bonded and integrated by pressing. At that time, the reinforcing disk 9 may be provided inside the polishing tool.

When the connecting portion 2 is present on the outer peripheral edge of the polishing cloth paper 1, first, the connecting portion 2 of the polishing cloth paper 1 on the surface layer is abraded and then used. The particles can be discharged outward.

[0028]

[Effect] With this structure, the polishing tool is generated by rotating the polishing tool while allowing the polishing fine powder and the polishing particles detached from the polishing cloth paper to be fitted into the notch on the side opposite to the rotation direction of the polishing tool. By the centrifugal force, the abrasive material is discharged from the outer end of the notch opened on the outer peripheral surface, so that clogging of the abrasive cloth paper can be prevented and polishing efficiency can be significantly improved.

Further, by using a conventional polishing tool in which a plurality of abrasive cloth paper pieces and a net are adhesively stacked and integrated to form an abrasive material, a large number of abrasive cloth paper pieces are radially arranged and fixed. It is possible to eliminate the inconvenience and chatter reduction that may occur due to the sagging of the corners of the work piece caused by, or the protrusion between the polished part and the non-polished part, and reduce the chattering. The net provided can reinforce and increase the rigidity of the abrasive.

Furthermore, since the laminated abrasive material of the polishing cloth paper is used, when the polishing cloth paper of the surface layer is worn out, the net is worn away and the polishing cloth paper of the next layer is exposed. And the life of the abrasive material is significantly extended.

Further, since the entire surface of the abrasive cloth paper forming the abrasive is brought into contact with the work piece, the advantages of the abrasive cloth paper can be maximized.

Further, since the notch is provided so as not to separate the abrasive cloth paper, the laminating operation of the abrasive cloth paper becomes extremely easy and it is strong against impact.

Since the intervening net forms an air flow path between the abrasive cloths, the cooling effect of the abrasive can be significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a polishing cloth used in the polishing tool of the present invention.

FIG. 2 is a perspective view of the net.

FIG. 3 is a vertical sectional front view of an abrasive formed by using the same as above.

FIG. 4 is a partially cutaway perspective view of a backing adhesively fixed to the same as above.

[Figure 5] Front view of the same section

[Explanation of symbols]

 1 Abrasive cloth paper 2 Connection part 3 Notch 4 Net 5 Abrasive material 6 Adhesive material 7 Substrate 8 Through hole 9 Reinforcing disk

Claims (1)

[Scope of utility model registration request] 1. A circular shape having a through hole in the center, and the inside and outside
A coated abrasive having a cut of a large number Article radially so as to leave at least the connecting portion connecting to either of the peripheral portion, the central
A plurality of circular nets with through holes
A polishing tool in which a disk-shaped substrate having a through hole in the center is adhered and fixed to the back surface of an abrasive formed by adhesion.