JPH0531698A - Method for improving cutting quality of disc-shaped rotary blade and the same rotary blade - Google Patents

Abstract

PURPOSE:To improve cutting quality of a disc-shaped rotary blade by forming a regular triangular through-hole, having size higher than that of a rotary shaft and having a V-shape part, in the central part of the rotary blade, pressing the rotary shaft against the V-shaped part, and eccentrically fixing the rotary shaft to the rotary blade by means of a rotation metal. CONSTITUTION:A regular triangular through-hole 8 having size higher than that of a rotary shaft 7 is formed in the central part of a disc-shaped rotary blade 6. The rotary shaft 7 is pressed against one V-shaped part 8a and fixed by means of a lock metal, and the rotary shaft 7 is mounted on the rotary blade 6 eccentrically by DELTAd. When the rotary blade 6 is rotated around the rotary shaft 7 serving as an axis, a cutting edge making contact with a work during cutting is longitudinally moved in the moving direction of a cutter. Thus, an unreasonable force is not exerted on the cutting edge, cutting quality is not deteriorated, and as a result, excellent cutting quality is provided. Even in the case of a soft work, such as a urethane foam, light cutting is practicable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving the sharpness of a plate-shaped rotary blade such as a meat cutting round blade or a circular saw tooth and a rotary blade thereof.

[0002]

2. Description of the Related Art Conventionally, deburring of urethane foam for cushions has been performed manually by using scissors, a knife, etc., but recently, as shown in FIG. It has been attempted to attach the disk-shaped rotary blade 1 to the tip of the robot arm 2 and scrape off burrs 3 formed during molding. However, unlike the meat, the urethane foam 4 is a material that is soft and has fine air bubbles. Therefore, if the moving speed of the rotary blade 1 is increased, the work is compressed before the burr 3 is cut and removed from a predetermined position. However, as shown in FIG. 2, the cutting edge 5 may be peeled off, or the burr 3 may be fused to the heated rotary blade 1 to make it difficult to continue cutting. Practical application of deburring urethane foam has been hindered.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain a disc-shaped rotary blade which improves the sharpness of the disc-shaped rotary blade, and is capable of cutting a soft work such as urethane foam without trouble. To do.

[0004]

Considering the mechanism when a soft work is cut by a rotary blade of a meat cutting round blade type as shown in FIG. 1, when the rotary blade is moved for cutting, the work is first Is compressed, and after the hardness of the work reaches a certain value, the repulsive force of the work performs push-cut cutting accompanied by slicing by rotation of the rotary blade. Therefore, while the repulsive force of the work is insufficient, the rotary blade is heated by friction and the burrs are fused to the rotary blade before it is cut, resulting in a cut-off cut and a clean moving speed. I found that I could not continue deburring. The present invention has been made based on this finding, in which the rotary blade is eccentrically attached to the rotary shaft, and the cutting edge is moved back and forth in the moving direction by twice the eccentric amount when cutting.
As in the case of vibration cutting, the blade may have unreasonable force,
It becomes difficult to heat and improves sharpness.

In the case of cutting a soft work, the conventional rotary blade does not cause the cutting action by the rotation unless the rotary blade is pushed in the direction of the work to some extent. The distance to the edge of the blade that touches it changes repeatedly by twice the amount of eccentricity, so push-cutting by movement is performed smoothly, sharpness is significantly improved, and even soft materials such as urethane homes can be cut without problems. You can Of course, this action also has a similar action when a hard material such as a circular saw tooth is targeted, and is more sharp than the conventional circular saw tooth.

[0005]

FIG. 3 shows an embodiment of the present invention, in which a disk-shaped rotary blade 6 is provided with a through-hole 8 in the center of the rotary blade 6 and having an equilateral triangle larger than the rotary shaft 7.
Is provided, and the rotary shaft 7 is pressed against the one V-shaped portion 8a,
Although not shown here, it is fixed by a fastener similar to the conventional one, and the rotary shaft 7 is attached to the rotary blade 6 eccentrically by Δd. When the rotary blade 6 is rotated about the rotary shaft 7, the blade tip in contact with the workpiece during cutting changes as shown in FIG. 4, and the blade tip moves back and forth in the moving direction of the blade. Therefore,
It does not have to be overpowered by conventional blades, does not deteriorate in sharpness, and as a result exhibits excellent sharpness, it can easily cut even soft work such as urethane foam, and only deburring work. Instead, robots can also mold urethane foam. Although the embodiment of the rotary blade for processing the urethane foam is shown here, it is needless to say that the rotary blade can be applied to a rotary blade such as a circular saw tooth. Further, in the embodiment, the case where the equilateral triangular through hole 8 is provided in the rotary blade 6 has been illustrated, but the shape of the through hole is not limited to this, and the rotary shaft mounting hole is provided eccentrically. Needless to say, a rotary shaft may be attached to the. The method of providing a through hole having a V-shaped portion, which is larger than the rotating shaft in the center of the rotating blade as shown in the embodiment, has an advantageous structure for sharpening the blade and is more eccentric than the structure of providing the rotating shaft mounting hole. Far superior.
That is, the through hole can be used as a shaft mounting hole when sharpening a blade, but in the case of an eccentric hole, it cannot be used as a shaft mounting hole when sharpening a blade.

[0006]

The first aspect of the invention has the effect of significantly improving the sharpness of the rotary blade, and the second aspect of the invention has an advantageous structure for eccentrically mounting the rotary shaft and for sharpening the blade. Excellent when industrially mass-producing rotary blades with eccentric rotary shafts.

[Brief description of drawings]

FIG. 1 is a perspective view showing deburring of urethane foam with a rotary blade using a conventional robot.

FIG. 2 is a diagram for explaining a problem of the conventional processing method shown in FIG.

FIG. 3 is a plan view of an embodiment of the present invention.

FIG. 4 is a diagram showing changes in the cutting edge during rotation.
1 rotary blade 2 robot arm 3 burr 4 urethane foam 5 cut 6 rotary blade 7 rotary shaft 8 through hole

Claims (2)

[Claims] 1. A method for improving the sharpness of a plate-shaped rotary blade, characterized in that the plate-shaped rotary blade is eccentrically attached to a rotary shaft. 2. The disk-shaped rotary blade is larger than the rotary shaft at the center,
And a rotary blade having a through hole having a V-shaped portion, and the rotary shaft is eccentrically attached to the rotary blade so that the rotary shaft is pressed against the V-shaped portion.