JP2003236762A - Cutter for cutting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter for cutting capable of suppressing burr. <P>SOLUTION: A cutting edge 2 is disposed on the outer periphery of a round tooth 1. Both sides of the outer peripheral ends of the cutting edge 2 in the thickness direction are provided with a pair of projecting edges 2A and 2B extending in the circumferential direction of the round tooth 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter used for cutting an object to be cut such as metal or rubber, and more specifically to a cutter for suppressing the formation of burrs when the object is cut. Regarding the cutter.

[0002]

2. Description of the Related Art Conventionally, a diamond cutter is known in which diamond particles are attached to a cutting blade portion provided on the outer peripheral portion of a steel disk-shaped round blade. Such a cutter is
It is used for various purposes such as grinding and cutting concrete members, stones, tiles, etc. by being attached to the rotary shaft of a cutting device and rotating at high speed.

By the way, when the above-mentioned cutter is used to cut an object to be cut made of metal or rubber, there are the following problems. For example, as shown in FIG. 7, when a profile extrusion molded product 20 in which a continuously extruded metal member 21 is covered with a rubber-like elastic layer 22 such as a thermoplastic elastomer is cut into a predetermined length, a round blade (cutter) is used. ) 23 is a metal member 21
When cutting while grinding, one end side of the thinned cut portion of the metal member 21 breaks first just before the end of cutting, and it rises up to the other end side not broken,
There was a problem that the cut profile extrusion-molded product 20 remained as burrs 24. The same problem arises when cutting an object such as a piece of rubber.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting cutter capable of suppressing burrs generated when cutting an object to be cut such as metal or rubber.

[0005]

According to the present invention to achieve the above object, a cutting blade portion is provided on an outer peripheral portion of a round blade, and a circumferential direction of the round blade is provided on both sides in a thickness direction of an outer peripheral end portion of the cutting blade portion. It is characterized in that a pair of convex blade portions extending along the are provided.

According to the above invention, when cutting an object to be cut made of metal, rubber or the like, the part to be cut of the object to be cut is housed between the convex blades. Therefore, just before the end of cutting, the cut portion does not have a thin plate shape as in the conventional case, but the cross-sectional shape has a thickness at the central portion side. Therefore, even if one side of the cut portion breaks first, the entire cut portion is deformed and curling up is suppressed, so that it is possible to suppress the occurrence of burrs.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an example of a cutting cutter according to the present invention. This cutter has a structure in which a cutting blade portion 2 having diamond particles adhered is provided on an outer peripheral portion of a steel disk-shaped round blade 1. There is. At the center of the round blade 1 is formed an opening 3 for attaching to the rotary shaft of the cutting device.

The cutting blade portion 2 has a pair of convex blade portions 2A, 2B protruding in an acute angle shape extending along the circumferential direction of the round blade 1 on both sides in the thickness direction of the outer peripheral end thereof. Convex blade 2A,
A recess 2C is formed between 2B. Bi-convex blade 2A, 2B
The profile shape of the concave portion 2C connecting the outer peripheral convex ends 2a, 2b is formed in a V shape, and the inner side surfaces of the convex blade portions 2A, 2B facing each other are inclined surfaces 2d inclined with respect to the radial direction of the round blade 1.
I am doing it.

The inclination angles α and β of the inclined surface 2d are preferably in the range of 25 to 60 ° with respect to the radial direction of the round blade 1. By setting the thickness in such a range, it is possible to effectively suppress the generation of burrs.

Outer peripheral convex ends 2a, 2b of the convex blade portions 2A, 2B
Are located on the same plane as the surfaces 2X and 2Y on both sides of the cutting blade portion 2 and project to have the same height. The area X of the cutting blade 2 to which the diamond particles are attached is 5 mm or more in the radial direction inner side of the round blade 1 from the outer peripheral convex ends 2a and 2b of the convex blades 2A and 2B.

According to the above-mentioned cutter of the present invention, as shown in FIG.
As shown in FIG. 5, when cutting the cut object 11 made of metal or rubber, the cut portion 11a of the cut object 11 is accommodated in the concave portion 2C between the convex blade portions 2A and 2B. You will be disconnected in the state. Therefore, as shown in FIG. 7, the portion 11a to be cut just before the end of cutting is
As shown in FIG. 2, it does not have a thin plate shape as in the conventional case, but has a triangular cross-section thickness.
Even if one end side of the blade breaks first, the entire cut portion 11a does not deform and curl up, and the convex blade portions 2A, 2B
Since the deformation is concentrated in the vicinity of the outer peripheral convex ends 2a and 2b, the convex blade portions 2A and 2B can surely cut without generating burrs.

FIG. 3 shows another example of the cutting cutter of the present invention. This cutter comprises the round blade 1 of FIG. 1 composed of a round blade body 1A having one convex blade portion 2A and a round blade body 1B having another convex blade portion 2B, and both round blade bodies 1A, 1B. Are stacked and integrally fixed. As described above, the plurality of round blades 1A and 1B may be combined to form the round blade 1 having the convex blade portions 2A and 2B on the cutting blade portion 2 on the outer peripheral portion.

The present invention, as shown in FIGS.
In a cross section taken along a plane passing through the rotation center axis CL of
It is preferable that the outer peripheral convex ends 2a, 2b of the convex blade portions 2A, 2B be formed into an acute angle from the two straight line portions, and the outer peripheral convex ends 2a, 2b are projected at the same height. It may be a cutting cutter as shown.

The cutting cutter shown in FIG. 4 has a convex blade 2A,
The outer peripheral convex ends 2a and 2b of 2B are surfaces 2X and 2Y of the cutting blade portion 2.
It is not on the same plane as the above, but is located on the inner side in the thickness direction with respect to the surfaces 2X and 2Y. When the outer peripheral convex ends 2a and 2b are arranged in this way, the rotation center axis CL of the round blade 1
In a cross-section (state of FIG. 4) cut by a plane passing through, 0.5 from both sides (both sides 2X, 2Y) of the cutting blade portion 2 in the thickness direction.
By arranging within the range M within mm, it is possible to improve the occurrence of burrs.

The cutting cutter shown in FIG. 5 is different from the cutting cutter shown in FIG. 4 in that the protruding heights of the outer peripheral convex ends 2a and 2b of the convex blade portions 2A and 2B are different. In this way, when the protruding heights of the outer peripheral convex ends 2a and 2b are made different, the bi-convex blade portion 2 in the radial direction of the round blade 1 is formed.
By setting the distance L between the outer peripheral convex ends 2a and 2b of A and 2B within 0.2 mm, the effect of improving burrs can be obtained.

The cutting cutter shown in FIG. 6 is the same as the cutting cutter shown in FIG. 5, except that the concave portion 2C has an uneven shape.
One of the two inclined surfaces 2d serving as the wall surface of the concave portion 2C is inclined in a shape in which two straight lines are combined in a sectional shape, and the other is an inclined surface in which an arc and a straight line are combined. The bottom surface of the concave portion 2C is formed in an uneven shape such that the central portion thereof is slightly projected. Even if the convex blade portions 2A and 2B that form the concave portion 2C are provided, the occurrence of burrs can be suppressed.

The range M and the distance L can be defined in the same manner as in FIG. The inclination angle α is the angle between the tangent line of the intermediate point P1 and the extension line of the side surface 2X in the cutter radial direction between the convex end 2a and the bottom of the concave portion 2C (the lowest point on the convex end 2a side in the figure). The angle β is an angle formed by the tangent line of the intermediate point P2 in the cutter radial direction between the convex end 2b and the bottom of the concave portion 2C (the lowest point on the convex end 2b side in the figure) and the extension line of the side surface 2Y.

In the present invention, in the above-described embodiment, an example is shown in which the cutting blade portion 2 having the diamond particles attached is provided on the outer peripheral portion of the round blade 1, but instead of this, the convex blade portions 2A, 2 are provided.
The cutting blade portion 2 may be one in which the tip of B has fine irregularities by means such as blast shot, or may be surface-treated to have fine irregularities for cutting.

The thickness of the cutting blade portion 2 of the round blade 1 used in the present invention can be 1 mm to 10 mm.

[0021]

EXAMPLES Example A Cutters 1 to 6 of the present invention in which the structure of the cutter, the distance L between the outer peripheral convex ends of both convex blades, the range M, and the inclination angles α and β of the inclined surface are changed as shown in Table 1. (Examples 1 to 6) and conventional cutter 1
(Comparative example 1) was manufactured. The diameter of the round blade is 250 mm, the thickness of the cutting blade is 2 mm, the area X of the cutting blade is 5 mm,
Diamond particles having a particle size of # 120 (average particle diameter 6 μm) are attached to the entire surface of the cutting blade portion in the region X by electrodeposition processing.

Each test cutter was attached to a cutting device, and a burr and blade life evaluation test was conducted under the following measurement conditions. The results shown in Table 1 were obtained. Burr Visually observe the occurrence of burrs when each test cutter cuts an object to be cut made of stainless steel with a thickness of 1 mm in the cutting direction at a cutting speed of 20 mm / sec. The evaluation was made in four grades of ◯, Δ, and ×. ◎
Shows no burrs and the cut surface is smooth. ○ No burrs occur, but there are minute protrusions on the edges of the cut surface. △ Minute burrs occur.
× Significant (about 2 mm) burrs are formed. Life of Blade Using each test cutter, an object to be cut made of stainless steel was repeatedly cut under the same conditions as above until the evaluation of the burr was lowered, and the result was evaluated in three grades of ◯, Δ, and ×. In the case of ○, the burr evaluation does not decrease after 10,000 or more cuttings. If the number of cuts is less than 10,000, the evaluation of burrs deteriorates. In the case of ×, a large (about 2 mm) burr is generated from the first time.

[0023]

[Table 1]

From Table 1, it can be seen that the cutter of the present invention can improve the generation of burrs in cutting metal.

Example B Cutters 7 to 12 of the present invention in which the structure of the cutter, the distance L between the outer peripheral convex ends of both convex blades, the range M, and the inclination angles α and β of the inclined surface are changed as shown in Table 2. Examples 7 to 12) and a conventional cutter 2 (comparative example 2) were manufactured. The diameter of the round blade, the thickness of the cutting blade, the length of the region X of the cutting blade, the particle size of the diamond particles, and the method of attaching the diamond particles are the same as in Example A.

Each test cutter was attached to a cutting device, and a burr and blade life evaluation test was conducted under the following measurement conditions. The results shown in Table 2 were obtained. Burrs Each test cutter visually observes the occurrence of burrs when cutting the cut object made of vulcanized rubber (EPDM) at a cutting speed of 20 mm / sec.
The evaluation was made in four grades of ◯, Δ, and ×. ⊚ means that there is no burr and the cut surface is smooth, ○ that there is no burr, but there is a minute convex portion at the end of the cut surface, △ that a minute burr occurs, and × that a large (about 2 mm) burr occurs. Blade life With each test cutter, vulcanized rubber (E
An object to be cut made of PDM) was repeatedly cut until the evaluation of the burr was lowered, and the result was evaluated in three grades of ◯, Δ, and ×. In the case of ○, the burr evaluation does not decrease after 10,000 or more cuttings. If the number of cuts is less than 10,000, the evaluation of burrs deteriorates. In the case of ×, a large (about 2 mm) burr is generated from the first time.

[0027]

[Table 2] From Table 2, it can be seen that the cutter of the present invention can improve the generation of burrs when cutting rubber.

[0028]

As described above, according to the present invention, a pair of convex shapes extending along the circumferential direction of the round blade are provided on both sides in the thickness direction of the outer circumferential end portion of the cutting blade portion provided on the outer circumferential portion of the round blade. Since the blade is provided,
It is possible to suppress the generation of burrs when a material such as metal or rubber is cut.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing an example of a cutting cutter of the present invention and a partially omitted main part cut along a plane passing through a rotation center axis of the cutter.

FIG. 2 is a cross-sectional explanatory view for explaining the operation of the cutting cutter of FIG.

FIG. 3 shows another example of the cutting cutter of the present invention, FIG.
It is a principal part expanded sectional view corresponded to.

FIG. 4 shows still another example of the cutting cutter of the present invention,
It is a principal part expanded sectional view corresponded to FIG.

5 shows another example of the cutting cutter of the present invention, FIG.
It is a principal part expanded sectional view corresponded to.

FIG. 6 shows still another example of the cutting cutter of the present invention,
It is a principal part expanded sectional view corresponded to FIG.

FIG. 7 is a cross-sectional explanatory view showing a state in which an object to be cut is cut by a conventional cutting cutter.

[Explanation of symbols]

1 Round Blade 1A, 1B Round Blade 2 Cutting Blade 2A, 2B Convex Blade 2X, 2Y Surface 2a, 2b Outer Peripheral Convex Edge 2d Inclined Surface L Distance M Range X Area α, β Inclination Angle

Claims (10)

[Claims] 1. A cutting blade portion is provided on an outer peripheral portion of a round blade, and a pair of convex blade portions extending along a circumferential direction of the round blade is provided on both sides in a thickness direction of an outer peripheral end portion of the cutting blade portion. The provided cutting cutter. 2. In the cross section cut by a plane passing through the center axis of rotation of the round blade, the outer peripheral convex end of the convex blade portion is arranged within 0.5 mm from both sides in the thickness direction of the cutting blade portion,
The cutting cutter according to claim 1, wherein a distance between the outer peripheral convex ends of the convex blade portion in the radial direction of the round blade is within 0.2 mm. 3. The cutting cutter according to claim 2, wherein a periphery of a convex end of the convex blade portion is formed by a straight line in a cross section cut along a plane passing through a rotation center axis of the round blade. 4. The cutting cutter according to claim 3, wherein the facing inner surface of the convex blade is inclined in a V shape. 5. The cutting cutter according to claim 2, 3 or 4, wherein the outer peripheral convex ends of the convex blade portion are located on both sides in the thickness direction of the cutting blade portion. 6. The cutting cutter according to claim 4, wherein an inclination angle of an inner side surface of the convex blade portion facing each other is set to 25 to 60 ° with respect to a radial direction of the round blade. 7. The cutting cutter according to claim 1, wherein the cutting blade portion of the round blade has diamond particles attached thereto. 8. The cutting cutter according to claim 7, wherein the area of the cutting blade portion is 5 mm or more from the outer peripheral convex end of the convex blade portion to the radially inner side of the round blade. 9. The circular blade having a convex blade portion on one side and a circular blade body having a convex blade portion on the other side.
The cutter for cutting according to any one of 1 to 8. 10. The object to be cut by the cutting cutter is metal or rubber, according to claim 1.
A cutter for cutting according to item.