JPH11198038A - Offset grinding wheel driving tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect pollution of a work environment by restraining the production of grinding dust in finish with a grinder. SOLUTION: An offset grinding wheel driving tool is composed of a rotary grinding wheel 10, a drive mechanism 20, an exhaust chamber 30, etc. The rotary grinding wheel 10, which is nearly disk shaped, is attached to the front end of the drive mechanism 20 and formed with a lot of through holes 11 penetrating the rotary grinding wheel 10 from the grinding face to the back all over the surface. The exhaust chamber 30 is fixed to the front end of the drive mechanism 20 and is arranged so as to cover the upper part above the openings of the through holes 11 along the back of the rotary grinding wheel 10. In the side face of the chamber 30, a port is provided to connect the inside of the chamber 30 to a pressure reduction exhausting device. The grinding dust produced in the grinding face in grinding is sucked in the chamber 30 through the through holes 11 by reducing the pressure in the chamber 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset wheel driving tool used for finishing a machined part or the like.

[0002]

2. Description of the Related Art Grinding using a grinder is widely performed at the site of finishing processing of machined parts and the like. As for such a grinding process, there is a problem of contamination of a working environment due to generated dust. Therefore, (a)
Have workers wear dust masks during work, (b) install a local dust collector and actively collect dust near the source of dust generation, (c) force the room where work is performed At the same time as exhausting air, measures are taken such as sending clean air into the room, and (d) using an industrial robot.

(Problems of the prior art) However, even when the industrial robot is provided with a grinder for finishing work, contamination of the working environment due to dust generation becomes a problem. In particular, in the case where the posture of the tool held by the industrial robot changes every moment, a sufficient effect cannot be obtained with the cheapest local dust collector. Therefore, measures such as accommodating the entire work system including the industrial robot in one room are taken.

In addition to the above problems, there are also problems such as dirt on the surface to be processed due to dust and a reduction in the processing speed due to heat generation on the grinding surface of the rotary grindstone. It is not easy to maintain the processing quality stably.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to provide:
It is an object of the present invention to provide a structure of an offset grindstone driving tool capable of preventing contamination of a working environment at the time of finishing, and a second object is to stain a work surface with dust or generate heat on a grinding surface of a rotary grindstone. An object of the present invention is to provide a structure of an offset grindstone driving tool that can solve problems such as a reduction in machining speed caused by the above.

[0006]

According to the present invention, there is provided an offset grindstone driving tool, comprising: a rotating grindstone provided with a plurality of through holes penetrating from a grinding surface to a back surface thereof; a driving mechanism for rotating the rotating grindstone; An exhaust chamber fixed to the drive mechanism, disposed so as to cover the openings of the plurality of through holes on the back side of the rotating grindstone, and provided with a connection port connected to a reduced-pressure exhaust unit. It is characterized by having.

[0007] According to the offset wheel driving tool of the present invention, by reducing the pressure in the chamber using the reduced-pressure exhaust means during the grinding process, the dust generated by the grinding is removed from the rotary grinding wheel through the through-hole. By suctioning to the back side, dust generation to the outside can be prevented. In addition, since fresh air flows from the surroundings into the grinding surface due to the suction, it also has the effect of cooling the grinding surface of the rotary grindstone.

On the contrary, by sending compressed gas into the chamber during grinding, compressed gas is blown between the ground surface and the surface to be processed through the through-hole, and The dust adhering to the processing surface can be blown off, and the grinding surface of the rotary grindstone can be forcibly cooled.

[0009]

FIG. 1 shows an outline of an offset wheel driving tool according to the present invention. The offset grindstone drive tool includes a rotary grindstone 10, a drive mechanism 20, an exhaust chamber 30, and the like.

The rotary grindstone 10 is attached to the front end of the drive mechanism 20 so that the rotation axis of the rotary grindstone 10 is perpendicular to the axis of the drive mechanism 20. Rotating whetstone 10
Has a shape close to a disk, and as shown in the detailed view of FIG. 2, a large number of through holes 11 penetrating from the ground surface (lower surface) to the rear surface (upper surface) are formed over the entire surface of the grindstone.

The exhaust chamber 30 includes the fixing band 3.
2, it is fixed to the front end of the drive mechanism 20 and is disposed along the back surface of the rotary grindstone 10. As shown in the detailed view of FIG. 3, a connection port 3 for connecting the inside of the chamber 30 to a decompression exhaust device (not shown) is provided on the side of the chamber 30.
1 is provided.

FIG. 4 shows a chamber 3 with respect to the rotating grindstone 10.
The details of the arrangement of 0 are shown. The chamber 30 includes the rotating grindstone 10.
And covers above the opening of the through-hole 11. The end 33 of the chamber 30 has a labyrinth structure, and has a structure for maintaining a pressure difference inside the chamber 30. The through-hole 11 is formed at an oblique angle with respect to the ground surface so as to gradually approach the center in the radial direction as it goes to the back side in consideration of the wear of the rotary grindstone 10. For this reason, the outer diameter of the chamber 30 is smaller than the outer diameter of the rotating grindstone 10. Also, the chamber 30
All ranges (360) in the circumferential direction of the rotating grindstone 10
It is not necessary to cover the actual processing range (about 180 degrees), as long as it is arranged in a range (about 220 degrees) that can cover the actual processing range.

By using the offset wheel driving tool having the above-described structure and depressurizing the inside of the chamber 30 during the grinding, dust generated on the ground surface can pass through the through hole 1.
It is sucked into the chamber 30 through 1 and collected.
Therefore, the working environment can be kept clean without scattering dust around. In addition, since fresh air flows from the surroundings into the grinding surface due to the suction, it also has the effect of cooling the grinding surface of the rotary grindstone.

Contrary to this, by sending compressed air into the chamber during grinding, compressed air is blown between the ground surface and the surface to be processed through the through-hole, and The dust adhering to the processing surface can be blown off to prevent contamination of the processing surface, and the grinding surface of the rotary grindstone can be forcibly cooled to prevent a reduction in processing speed.

[0015]

According to the offset whetstone driving tool of the present invention, by reducing the pressure in the chamber during the grinding, the dust can be sucked to the back side of the rotating whetstone and the generation of dust to the outside can be suppressed. . Thereby, the working environment can be kept clean.

On the contrary, by sending compressed air or the like into the chamber during the grinding process, the compressed air or the like is blown between the ground surface and the work surface, and adheres to the work surface. In addition to blowing off dust, the grinding surface of the rotary grindstone can be forcibly cooled to prevent a reduction in processing speed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of an offset grindstone driving tool according to the present invention, (a) is a front view, and (b) is a left side view.

FIG. 2 is a view showing details of a rotary grinding wheel used in an offset grinding wheel drive tool according to the present invention, (a) is a top view,
(B) shows a front view.

FIG. 3 is a view showing details of an exhaust chamber used in the offset wheel driving tool of the present invention.

FIG. 4 is a diagram showing an arrangement of an exhaust chamber with respect to the rotating grindstone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... rotary grindstone, 11 ... through-hole, 20 ... drive mechanism part, 30 ... chamber, 31 ... connection port, 32 ... fixing band, 33 ... end part.

Claims (2)

[Claims] 1. A rotary grindstone provided with a plurality of through holes penetrating from a grinding surface to a back surface thereof, a drive mechanism for rotating and driving the rotary grindstone, and a back surface of the rotary grindstone fixed to the drive mechanism unit. And an exhaust chamber provided with a connection port connected to a reduced pressure exhaust means, the exhaust wheel driving tool being disposed so as to cover the openings of the plurality of through holes on the side. 2. A rotating grindstone provided with a plurality of through holes penetrating from a grinding surface to a back surface thereof; a driving mechanism for rotating the rotating grindstone; and a back surface of the rotating grindstone fixed to the driving mechanism unit. A gas discharge chamber provided with a connection port connected to a supply means of compressed gas, which is disposed so as to cover the openings of the plurality of through holes on the side, and an offset whetstone driving tool, comprising: .