JP2005246535A - Cutting blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting blade facilitating adjustment of a tensioning quantity of a blade substrate. <P>SOLUTION: The cutting blade 1 is provided with a cutting abrasive material layer 3 formed on the outer peripheral side of a disk-like substrate 2, and chip discharge slits 4 provided between cutting tips 3. Holes 5 are provided at circumferentially equal spaces in a body part of the substrate 2, and through-hole embedded tips 6 are pressed into the holes 5. The hole 5 is formed to be narrow in width on the outer peripheral side of the substrate 2 and to be wide on the center side, and the through-hole embedded tip 6 is formed to be narrow in width on the outer peripheral side of the substrate 2 and to be wide on the center side. The hole 5 is expanded when pressing the through-hole embedded tip 6 into the hole 5, but the force at this time is adjusted to allow the adjustment of the tensioning quantity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cutting blade used for cutting work on a paved road.

For cutting work on paved roads, a cutting blade having diamond chips attached to the outer peripheral side of a disk-shaped substrate is usually used. When the body of the blade substrate rubs against the cutting groove, the cutting blade cannot perform the cutting operation normally. In order to prevent this situation, a blade is used in which a diamond tip is attached to the body portion of the blade substrate by a simultaneous sintering method in which the diamond tip formed on the outer periphery of the blade is simultaneously sintered.
As a method using the simultaneous sintering method, Patent Document 1 describes a diamond cutter in which a chip for protecting a substrate is provided at a predetermined position of a body portion of the substrate.

JP 2000-33571 A

When blades are manufactured by the simultaneous sintering method, it is necessary to put the substrate in a sintering furnace, and it is difficult to manufacture a large-diameter blade because of the space limitation of the sintering furnace. Moreover, the cutting blade requires a waisting operation in order to perform high-speed cutting with a thin disk-shaped tool. Waist insertion work is the resistance of the substrate against external force due to cutting resistance when compressive stress is generated mainly due to heat generated by the cutting edge grinding the work material from the cutting edge to the outer periphery of the substrate and thermal expansion of the outer periphery of the substrate. However, in order to prevent the deformation of the substrate, compressive stress due to hammering is left in advance in the body of the substrate in order to prevent the deformation of the substrate. This is an operation performed to keep the substrate in use in a tensioned state so that a tensile stress is generated relatively on the outer peripheral side compared to the inner peripheral side. In this waisting operation, it is necessary to strike the body of the substrate with a hammer. However, with the blade using the above-mentioned simultaneous sintering method, the work is performed by avoiding the chips placed on the body after forming the blade. Therefore, the operation becomes complicated.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cutting blade that can easily adjust the amount of insertion of the blade substrate.

In order to solve the above problems, the present invention provides a cutting blade having a cutting abrasive layer formed on the outer peripheral side of a substrate, wherein a hole penetrating the substrate is provided in a body portion of the substrate. It is formed so as to be long in the radial direction of the substrate and its width is narrow at the outer peripheral side of the substrate and wide at the center side, and a through-hole embedded chip is press-fitted into the hole. Accordingly, the cutting blade is characterized in that the width is narrow on the outer peripheral side of the substrate and wide on the center side.
The hole is expanded when the through-hole embedded chip is press-fitted into the hole. By adjusting the force at this time, the amount of waist insertion can be adjusted easily, and the body can be inserted without hitting the body of the board. Is possible.

According to the present invention, in a cutting blade in which a cutting abrasive layer is formed on the outer peripheral side of the substrate, a hole penetrating the substrate is provided in the body of the substrate, and the hole is long in the radial direction of the substrate and has a width. It is formed to be equal on the outer peripheral side and the center side of the substrate, and two through-hole embedded chips are press-fitted into the holes, and the shape of each of the through-hole embedded chips is formed in a tapered shape. The cutting blade is press-fitted so that the narrow side of the hole-embedded chip and the wide side of the other through-hole-embedded chip are in contact with each other.
The hole is expanded when the through-hole embedded chip is press-fitted into the hole. By adjusting the force at this time, the amount of waist insertion can be adjusted easily, and the body can be inserted without hitting the body of the board. Is possible.

In the cutting blade of the present invention, the through-hole embedded chip is bonded on a surface in contact with the substrate.
Thereby, it is strong with respect to the centrifugal force by rotation of a cutting blade, and the side resistance by bending cutting, and the safety | security of a cutting blade increases.

In the cutting blade of the present invention, the through hole embedded chip has a wear-resistant layer, and voids are formed through the substrate on the outer peripheral side and the center side of the through hole embedded chip, respectively.
When the through hole embedded chip has the wear-resistant layer, local wear at both end portions of the through hole embedded chip can be prevented, and the chip discharging effect can be enhanced by the gap.

In the cutting blade of the present invention, the through-hole embedded chip is provided so as to form a predetermined angle with respect to the radial direction of the substrate.
Thereby, the scooping effect of a chip can be acquired and cutting performance improves.

  According to the present invention, in the cutting blade in which the abrasive layer for cutting is formed on the outer peripheral side of the substrate, the hole that penetrates the substrate is provided in the body portion of the substrate, and the through hole embedded chip is press-fitted into the hole. Accordingly, it is possible to easily adjust the amount of waist insertion, and it is possible to realize a cutting blade that can perform waist insertion work without hitting the body of the substrate.

Below, the cutting blade of this invention is demonstrated based on the embodiment.
FIG. 1 shows a configuration of a cutting blade according to the first embodiment of the present invention. FIG. 1A is a front view of the cutting blade, and FIG.
In the cutting blade 1, a plurality of cutting chips 3 are formed on the outer peripheral side of a disk-shaped substrate 2, and a chip 4 for discharging chips is provided between the cutting chips 3. Holes 5 are provided in the body portion of the substrate 2 at equal intervals in the circumferential direction, and hard chips 6 are press-fitted into the holes 5. Both the cutting tip 3 and the hard tip 6 can be formed using diamond.

  The hole 5 is long in the radial direction of the substrate 2 and has a width that is narrow on the outer peripheral side of the substrate 2 and wide on the center side. The shape of the hard chip 6 is set to match the shape of the hole 5. It is formed so as to be narrow at the outer peripheral side of the substrate 2 and wide at the center side. The taper angle of the hard chip 6 is defined as θ. When the hard tip 6 is press-fitted into the hole 5 in the direction indicated by the arrow, the hole 5 is expanded. The amount of waist insertion can be adjusted by adjusting the force at this time. The hard chip 6 is bonded and fixed on both side surfaces in contact with the substrate 2, thereby being strong against the centrifugal force caused by the rotation of the cutting blade 1 and the side resistance caused by bending cutting, thereby increasing safety.

On the outer peripheral side and the center side of the hard chip 6 are formed gaps 7 penetrating the substrate, and this gap 7 can prevent local wear at both ends of the hard chip 6 and enhance the chip discharging effect. Can do.
As shown in FIG. 1B, there is a relationship of E <C ≦ T between the thickness E of the substrate 2, the thickness T of the cutting chip 3, and the thickness C of the hard chip 6 that is press-fitted. It is preferable. If the thickness C of the press-fitted hard chip 6 is thinner than the thickness E of the substrate 2, it is not possible to prevent the body displacement of the substrate 2. Further, if the thickness C of the hard chip 6 that is press-fitted is thicker than the thickness T of the cutting chip 3, the cutting resistance at the time of cutting becomes too large, which is not preferable.

FIG. 2 shows a configuration of a cutting blade according to the second embodiment of the present invention. FIG. 2A is a front view of the cutting blade, and FIG.
In this embodiment, the shape of the substrate 2 of the blade is not a disc shape, and the side portion 2b forms a predetermined angle φ with respect to the bottom portion 2a of the substrate 2 as shown in FIG. This is different from the first embodiment. Also in this embodiment, the cutting blade 1 has a plurality of cutting chips 3 formed on the outer peripheral side of a disk-shaped substrate 2, and a chip discharge slit 4 is provided between the cutting chips 3. . Holes 5 are provided in the body portion of the substrate 2 at equal intervals in the circumferential direction, and hard chips 6 are press-fitted into the holes 5. The hole 5 is long in the radial direction of the substrate 2 and has a width that is narrow on the outer peripheral side of the substrate 2 and wide on the center side. The shape of the hard chip 6 is set to match the shape of the hole 5. It is formed so as to be narrow at the outer peripheral side of the substrate 2 and wide at the center side. The taper angle of the hard chip 6 is defined as θ.

Also in this embodiment, when the hard chip 6 is press-fitted into the hole 5 in the direction indicated by the arrow, the hole 5 is expanded. By adjusting the force at this time, the amount of waist insertion can be adjusted.
Further, as in the first embodiment, there is a relationship of E <C ≦ T between the thickness E of the substrate 2, the thickness T of the cutting chip 3, and the thickness C of the hard chip 6 that is press-fitted. Preferably there is.

  FIG. 3 shows a configuration of a cutting blade according to the third embodiment of the present invention. In this embodiment, the shape of the cutting blade 1 is the same as that of the first embodiment, but a hole 5 is provided in the body of the substrate 2 at a predetermined angle with respect to the radial direction of the cutting blade 1. . Since the hard tip 6 is press-fitted into the hole 5, the hard tip 6 also has a predetermined angle with respect to the radial direction of the cutting blade 1. This angle α is preferably about 5 to 15 degrees. When such a hard chip 6 is provided, a chip scooping effect can be obtained and cutting performance is improved. Also in this embodiment, when the hard chip 6 is press-fitted into the hole 5 in the direction indicated by the arrow, the hole 5 is expanded. By adjusting the force at this time, the amount of waist insertion can be adjusted.

FIG. 4 shows the configuration of a cutting blade according to the third embodiment of the present invention. In this embodiment, the shape of the cutting blade 1 is the same as in the first embodiment, but the shape of the hole 5 and the shape of the hard tip 6 press-fitted into the hole 5 are different from those in the first embodiment. Yes. The hole 5 is long in the radial direction of the substrate 2, and the width thereof is formed to be equal between the outer peripheral side and the center side of the substrate 2, and two hard chips 6 are press-fitted into the hole 5. The shape of each hard chip 6 is tapered, and the hard chip 6 is press-fitted so that the narrow side of one hard chip 6 is in contact with the wide side of the other hard chip 6. The taper angle of the hard chip 6 is defined as θ.
A hole 5 is provided in the body of the substrate 2 at a predetermined angle α with respect to the radial direction of the cutting blade 1. Since the hard tip 6 is press-fitted into the hole 5, the hard tip 6 also has a predetermined angle α with respect to the radial direction of the cutting blade 1.

When the hard tip 6 is press-fitted into the hole 5 in the direction indicated by the arrow, the hole 5 is expanded. The amount of waist insertion can be adjusted by adjusting the force at this time. The hard chip 6 is bonded and fixed on the side surface in contact with the substrate 2, thereby being strong against the centrifugal force caused by the rotation of the cutting blade 1 and the side resistance caused by bending cutting, thereby increasing safety.
On the outer peripheral side and the center side of the hard chip 6 are formed gaps 7 penetrating the substrate, and this gap 7 can prevent local wear at both ends of the hard chip 6 and enhance the chip discharging effect. Can do.

  In order to confirm the performance of the cutting blade of the present invention, the following tests were conducted. Table 1 shows the test conditions.

  Comparison blade using the cutting blade (invention product 1) shown in FIG. 1, the cutting blade (invention product 2) shown in FIG. 3, the cutting blade (invention product 3) shown in FIG. 4, and a straight hard tip that is not tapered. The test results are shown in Table 2.

  In inventions 1, 2, and 3, the amount of waist placement is within the range of −0 to −0.25 mm, which is suitable as the amount of waist placement of the blade product after bonding, and it is necessary to correct the amount of waist placement thereafter. Absent. On the other hand, the comparison product has a waist insertion amount of +0.56, and it is necessary to correct the waist insertion amount. The amount of substrate deflection indicating the distortion of the substrate is 0.3 mm or less, which is the range that can be used as a blade product in the inventive products 1, 2, and 3, but is 1.2 mm in the comparative product, which requires correction.

  Moreover, in order to confirm the effect by the inclination angle of the hard tip, the cutting speed was measured. Inventive products 2 and 3 in which the hard tip is tilted in the rotational direction, compared with the inventive product 1 in which the hard tip is not tilted in the rotational direction, the cutting speed is improved to 1.5 to 1.6 times that of the inventive product 1 ing. This is because the chip discharging effect is improved by tilting the hard tip in the rotation direction.

  The present invention can be used as a cutting blade used for cutting work on a paved road.

It is a figure which shows the cutting blade which concerns on the 1st Embodiment of this invention. It is a figure which shows the cutting blade which concerns on the 2nd Embodiment of this invention. It is a figure which shows the cutting blade which concerns on the 3rd Embodiment of this invention. It is a figure which shows the cutting blade which concerns on the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting blade 2 Substrate 3 Cutting abrasive layer 4 Slit 5 Hole 6 Through-hole embedded chip 7 Void

Claims (5)

  In a cutting blade in which a cutting abrasive layer is formed on the outer peripheral side of the substrate, a hole penetrating the substrate is provided in the body portion of the substrate, and this hole is long in the radial direction of the substrate and its width is on the outer peripheral side of the substrate And a through hole embedded chip is press-fitted into the hole, and the shape of the through hole embedded chip is narrow on the outer peripheral side of the substrate according to the shape of the hole, A cutting blade characterized by being formed to be wide at the center side.   In a cutting blade in which a cutting abrasive layer is formed on the outer peripheral side of the substrate, a hole penetrating the substrate is provided in the body portion of the substrate, and this hole is long in the radial direction of the substrate and its width is on the outer peripheral side of the substrate And two through-hole embedded chips are press-fitted into the holes, and the shape of each of the hard chips is tapered, and the width of one through-hole embedded chip is A cutting blade that is press-fitted so that the narrow side and the wide side of the other through-hole embedded chip are in contact with each other.   The cutting blade according to claim 1 or 2, wherein the through hole embedded chip is bonded on a surface in contact with the substrate.   The said through-hole embedding chip | tip has a wear-resistant layer, and the space | gap which penetrates a board | substrate is formed in the outer peripheral side and center side of a through-hole embedding chip, respectively. Cutting blade.   The cutting blade according to any one of claims 1 to 4, wherein the through-hole embedded chip is provided so as to form a predetermined angle with respect to a radial direction of the substrate.

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