JP3485494B2 - Rotary cutting blade - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cutting blade for moving and cutting while rotating in the axial direction of a fixing hole for fixing the rotating shaft of a cutting blade body.

[0002]

2. Description of the Related Art In recent years, a rotary blade for a plane (see Japanese Patent Publication No. 7-39087) has been proposed in which a plurality of arms are obliquely provided on the outer periphery of a cylinder, and blades are fixed to the arms, respectively. The rotary blade is used for flat surfaces such as wood, processing and molding, and a saw blade is known as a rotary blade with a hard blade formed on the end face of a disk. Used for cutting.

[0003]

By the way, in the rotary blade for a plane, the plate to be processed is recessed by the width of the cylinder to be cut by pushing the cylinder in the rotating direction, and is also deviated from the center axis of the cylinder. By drawing a circle around the point, it is possible to cut in an arc shape, but this rotary blade for planes cannot be moved in the axial direction of the cylinder, and the saw blade is also in the rotational axis direction. Could not be moved to.

[0004]

According to the present invention, a fixing hole having a predetermined thickness for fixing a rotating shaft is provided in the center, and a plurality of arm portions projecting at a predetermined rake angle at substantially equal intervals are provided. A cutting blade body made of a hard member having grooves formed in the arm portion in a circumferential direction, and a base portion having a predetermined length formed at one end of the hard member is inserted and fixed in the groove of the arm portion of the cutting blade body. In addition, one cutting blade having a blade portion formed by cutting from one side of the side portion to the other side with the same width as the base portion and a blade portion cut from the other side of the side portion to the one side with the same width as the base portion. The other cutting blade having is alternately fixed to the arm portion, and while moving the cutting blade main body, by moving in the axial direction of the fixing hole or in a direction slightly deviated from the axial direction, Cutting the surface, or the width of the cutting blade on the surface of the workpiece Ri is intended to form a wide cutting grooves, also, the blade portion of the blade portion and the other of the cutting edge of the one cutting edge may be formed thinner than the base.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the base portion of the hard member is inserted and fixed in the widthwise direction in the grooves provided in the arm portions of the cutting blade main body in the circumferential direction, respectively, from one side of the side portion at the other end from the base portion of the hard member. One cutting blade having a blade portion formed by cutting along the other side and the other cutting blade formed by cutting from the other side of the side portion of the base portion of the hard member to the other side alternate on the arm portion. When the cutting blade body is rotated and moved in one axial direction or in a direction slightly deviated by being fixed to, the surface of the workpiece can be cut by the cutting blade in the moving direction of the cutting blade body. Also, when the cutting blade body is rotated and moved in the opposite axial direction or in a direction slightly deviated, the surface of the workpiece can be cut by the other cutting blade in the moving direction.

[0006]

1 is a plan view of a rotary cutting blade according to an embodiment of the present invention, in which a cutting blade body 1 having a predetermined thickness is formed with a central hole 2 into which a rotary shaft is inserted and fixed. Arms 3a, 3b, 3c, 3d, 3e, 3f are formed around the periphery at substantially equal intervals, and the front surfaces 4a, 4a of the arm portions 3a to 3f in the rotation direction are formed.
b, 4c, 4d, 4e, and 4f form a predetermined rake angle with respect to a plane passing through the center of the central hole 2, and are inclined so as to remove cutting chips to the side, and further, the arm portion 3a.
3f are grooves 5a, 5b, 5c and 5 in the circumferential direction, respectively.
d, 5e, and 5f are formed.

FIG. 2 is a plan view of one cutting blade. In one cutting blade 6, a base 6b is formed from one end 6a of a hard plate to a predetermined width, and the other end 6c is formed from the base 6b. The blade is formed on one side 6e of the blade portion 6d by forming the gap thinly and cutting so as to incline obliquely from one side 6e of this thinly formed blade portion 6d to the other side 6f,
When forming the blade 6e, the base 6b is also cut diagonally,
Further, the corner of the tip of the other end 6g of the flat plate is cut obliquely to form the inclined portion 6h.

FIG. 3 is a plan view of the other cutting blade. In the other cutting blade 7, a base portion 7b is formed from one end portion 7a of a hard flat plate by a predetermined width, and the base portion 7b extends from the other end portion 7c. By forming the gap thinly and cutting so as to incline obliquely from the other side 7e of this thinly formed blade portion 7d to the one side 7f, a blade is formed on the other side 7e of the blade portion 7d,
When forming the blade 7e, the base portion 7b is also cut diagonally,
Further, the corner of the tip of the other end portion 7g of the flat plate is cut obliquely to form the inclined portion 7h.

The groove 5a of the arm portion 3a of the cutting blade body 1
The base 6b of one of the cutting blades 6 is inserted and fixed, the base 7b of the cutting blade 7 is inserted and fixed in the groove 5b of the arm 3b, and the base 6b of the cutting blade 6 is inserted and fixed in the groove 5c of the arm 3c. The base portion 7b of the cutting blade 7 is inserted and fixed in the groove 5d of the arm portion 3d, the base portion 6b of the cutting blade 6 is inserted and fixed in the groove 5e of the arm portion 3e, and the base portion 7b of the cutting blade 7 is inserted in the groove 5f of the arm portion 3f. By inserting and fixing, the rotary cutting blade 8 shown in FIG. 4 can be configured.

As shown in FIG. 5, a rotary shaft rotated by a motor (not shown) is inserted and fixed in the central hole 2 of the rotary cutting blade 8, and the rotary cutting blade 8 is rotated in the direction of arrow A. When the workpiece 9 is cut by moving in the direction of the arrow B, which is shifted by about 45 degrees with respect to the direction of the rotation axis, the surface of the workpiece 9 has an arc-shaped groove 10 wider than the width of the rotary cutting blade 8. Is formed, and when further moving from the direction of the arrow B in the direction of the arrow C at a right angle, the arc-shaped groove 11 is similarly formed, and the connection line 12 is formed at the intersection of the arc-shaped grooves 10 and 11. To be done.

Here, as shown in FIGS. 6 and 7, the blade portions 6d and 7d of the cutting blades 6 and 7 have the same width as the base portions 6b and 7b, and the blades 6e and 7e of the blade portions 6d and 7d are The cutting blades 6 and 7 are cut diagonally from the side portions 6e to 6f of the blade portion 6d so as to be formed at the opposite end portion, and diagonally from the side portions 7e to 7f of the blade portion 7d. By alternately inserting and fixing in the grooves 5a to 5f of the arm portions 3a to 3f of the cutting blade body 1 shown in FIG. 1, the rotary cutting blade 13 as shown in FIG. 8 is configured.

When the surface of the workpiece is cut by the rotary cutting blade 8 shown in FIG. 4, the cutting blade 6 shown in FIGS.
Since the blade portions 6d and 7d of 7 are thin, a slight cutting streak is easily attached to the cutting surface, but this cutting streak can be easily removed by sanding, and the rotary cutting blade 13 of FIG. Since the blade portions 6d and 7d are thick, there are few machining streaks on the cutting surface of the workpiece.

[0013]

As described above, in the rotary cutting blade of the present invention, by rotating and moving in the direction of the rotational axis or in the direction deviated from it, a width wider than the width of the blade portion of the cutting blade is formed on the surface of the workpiece. The groove can be cut, and by moving the cutting movement direction at a right angle, a connecting line can be formed at the intersection of two orthogonal grooves. There are advantages such as flat processing and the ability to form patterns.

[Brief description of drawings]

FIG. 1 is a plan view of a cutting blade body according to an embodiment of the present invention.

FIG. 2 is a plan view of one cutting blade fixed to the cutting blade body of FIG.

FIG. 3 is a plan view of the other cutting blade mounted on the cutting blade body of FIG.

FIG. 4 is a plan view of a rotary cutting blade according to an embodiment of the present invention.

FIG. 5 is a diagram showing a state in which a workpiece is cut by the rotary cutting blade of the present invention.

FIG. 6 is a plan view of one cutting blade according to another embodiment of the present invention.

FIG. 7 is a plan view of the other cutting blade according to another embodiment of the present invention.

FIG. 8 is a plan view of a rotary cutting blade according to another embodiment of the present invention.

[Explanation of symbols]

1 cutting blade body 2 central hole 3a-3f arm 4a-4f Front surface in the rotation direction 5a-5f groove 6,7 cutting blade 8 rotary cutting blades 9 Work piece 10, 11 arcuate groove 12 connection lines 13 rotary cutting blade

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Claims (2)

(57) [Claims] 1. A fixing hole having a predetermined thickness for fixing a rotating shaft is provided in the center, and a plurality of arm portions projecting at a predetermined rake angle at substantially equal intervals are provided, and the arm portions are circumferentially arranged. A cutting blade main body made of a hard member each provided with a groove, and a base having a predetermined length formed at one end of the hard member is inserted and fixed into the groove of the arm portion of the cutting blade main body, and the same width as the base. With one cutting blade having a blade portion formed by cutting from one side of the side portion to the other side and the other cutting blade having a blade portion having the same width as the base portion and being cut from the other side of the side portion to one side Alternatingly fixed to the arm portion, while rotating the cutting blade body, by moving in the axial direction of the fixing hole or in a direction slightly deviated from the axial direction, the surface of the workpiece is cut, or the workpiece is cut. A cutting groove wider than the width of the cutting blade can be formed on the surface of the processed member. A rotary cutting blade characterized by and. 2. The rotary cutting blade according to claim 1, wherein the blade portion of the one cutting blade and the blade portion of the other cutting blade are made thinner than the base portion.