JP2019155582A - Rotary saw, electric power tool, and machine tool - Google Patents

Abstract

To provide a rotary saw in which noise is reduced.SOLUTION: In a rotary saw in which a slit is formed in an intermediate region between a discoidal body and a cutting part of an outer periphery of the discoidal body, the slit has a meandering path, respective slits, which face each other by the meandering path, have an inclined plane with respect to a thickness direction of the discoidal body, and the inclined planes of the slits, which face each other, are parallel or non-parallel to each other. When viewing from a slit opening part on one principal surface side of the discoidal body in a vertical direction with respect to a principal surface of the discoidal body, a slit opening part of the other opposite principal surface cannot be confirmed.SELECTED DRAWING: Figure 1

Description

Detailed Description of the Invention

  The present invention relates to a rotary saw for cutting a cutting material such as wood, metal, stone, and the like, and in particular, includes a rotary saw that can reduce noise generated during cutting, a power tool using the rotary saw, and a rotary saw. Is related to machine tools.

  The rotary saw is composed of a disk-shaped substrate (base plate) and a plurality of teeth formed on the outer periphery of the substrate. When a workpiece such as wood, metal, stone, etc. is cut using this rotary saw, noise is generated. The noise has a great influence on the neighborhood, and noise reduction and noise improvement are required.

  The cause of the noise of the rotary saw is that the saw blade and the work material vibrate due to friction between the rotating saw blade and the work material. It is difficult to suppress noise generated by this vibration. In particular, if the vibration generated by the fluctuation of the frictional resistance between the saw blade and the work material coincides with the natural frequency of the rotary saw, the vibration will increase, thereby increasing the noise. Various proposals have been made to reduce the noise of such rotary saws.

  For example, JP-A 2000-120777 discloses a circular saw having a damping function. This circular saw is provided with a plurality of blade bodies over the entire outer periphery of a circular saw base metal, and a superalloy saw blade is brazed to each blade body. The feature of this circular saw is that a slit having a width of 1 mm to 0.1 mm is formed in an intermediate area of the circular saw, and particles are filled in the slit to obtain a vibration damping effect.

As a specific configuration, a slit whose both ends do not open is provided in an intermediate region of the circular saw base metal, and specifically, magnetized particles are filled in the slit.
According to such a configuration, since the particles are filled in the slits, the particles are rubbed against the side surfaces of the slits or the particles are rubbed against each other, thereby reducing vibration energy and suppressing vibrations. Further, since the width of the slit is set to 1 mm to 0.1 mm, the particles completely enter the slit and are difficult to drop off, thereby obtaining a sufficient damping effect.

  However, when a slit is formed in a circular saw alloy and a viscoelastic material is filled in the slit and then a low friction material is formed on the substrate surface, the filler melts due to heating during the formation of the low friction material. Occurred. Further, it has been found that when a low friction material is formed first after the slit is formed and then the viscoelastic material is filled, the filled material falls off. That is, it is a phenomenon that the viscoelastic material falls off without being firmly fixed in the slit due to the low friction material formed in the slit.

JP 2000-120777 A

  An object of the present invention is to provide a rotary saw that solves the above-mentioned problems, and in order to further reduce the noise of the rotary disc generated during processing, the rotary saw body itself has been devised. Is.

The first invention for achieving the above object is as follows:
A disk-shaped body, a blade portion provided on an outer periphery of the disk-shaped body, and an area of the disk-shaped body, provided in an intermediate region between the center of the disk-shaped body and the blade section; Consisting of slits that penetrate the front and back surfaces of the body,
The slit has a meandering path, and the slits arranged opposite to each other by the meandering path have an inclined surface with respect to the thickness direction of the disk-shaped body and the inclined surfaces of the opposing slits are The slit openings on the other main surface that are parallel to each other or non-parallel to each other when viewed from the slit opening on one main surface side of the disk-shaped body in the direction perpendicular to the main surface of the disk-shaped body are confirmed. It is a rotary saw that cannot be used.

Furthermore, the second invention for achieving the above object is as follows.
It comprises a base part and a circular saw body supported with respect to the base, the circular saw body is an electric tool composed of an electric motor and a rotary saw driven to rotate by the electric motor,
The rotary saw includes a disk-shaped body, a blade portion provided on an outer periphery of the disk-shaped body, a region of the disk-shaped body, and an intermediate region between the center of the disk-shaped body and the blade portion. Provided with a slit penetrating the front and back surfaces of the disk-shaped body,
The slit has a meandering path, and the slits arranged opposite to each other by the meandering path have an inclined surface with respect to the thickness direction of the disk-shaped body and the inclined surfaces of the opposing slits are The slit openings on the other main surface that are parallel to each other or non-parallel to each other when viewed from the slit opening on one main surface side of the disk-shaped body in the direction perpendicular to the main surface of the disk-shaped body are confirmed. It is an electric tool characterized by being unable to.

  According to the present invention, the cutting resistance and the vibration resistance can be reduced, so that the noise generated between the rotary saw and the material to be cut is reduced, and there is an advantage that the noise reduction effect is enabled.

It is a schematic block diagram which shows one Embodiment of the rotary saw which concerns on this invention. It is a partial cross section figure showing an example of a disk-like object containing a slit of a rotary saw concerning this invention. It is a partial cross section figure which shows the other example of the disk shaped body containing the slit of the rotary saw which concerns on this invention. It is the schematic which shows the state which forms a slit in the rotary saw which concerns on this invention. It is a schematic perspective view which shows the electric tool using the rotary saw which concerns on this invention. It is a perspective view showing one embodiment of a machine tool provided with a rotary saw concerning this invention. It is a perspective view which shows other embodiment of the machine tool provided with the rotary saw which concerns on this invention.

The best embodiment of the present invention will be described below with reference to FIG.
In FIG. 1, the rotary saw body 10 is composed of a disk-shaped body 11 made of stainless steel or the like and a large number of blade portions 12 formed at regular intervals along the outer periphery of the disk-shaped body 11. Yes. A mounting hole 13 is formed at the center of the disc-like body 11.

  The disk-like body 11 is provided with slits 14 in a meandering manner from the outer periphery to the inside. A plurality of these slits 14 are formed at positions where both vibration propagating in the radial direction from the center of the disk-shaped body 11 and vibration propagating along the circumferential direction of the disk-shaped body 11 can be suppressed. Yes.

In the disk-shaped body 11, a slit 15 that is provided in an intermediate region between the center of the disk-shaped body 11 and the blade portion 12 and penetrates the front and back surfaces of the disk-shaped body 11 is provided.
FIG. 2 is an example of the rotary saw according to the present invention, showing a cross-sectional view taken along line AA of the disk-shaped body 11 of FIG. 1, and a partial cross-sectional view of the disk-shaped body 11 including the slit 15. is there.
In FIG. 2, the slit 15 has a meandering path, and the slits 15 facing each other are arranged and formed by the meandering path. The slit 15 shown in FIG. 2 has an inclined surface with respect to the thickness direction of the disk-like body 11. Specifically, the slits 15 are parallel to each other from the front surface side 11 a to the back surface side 11 b of the disk-shaped body 11.

  As is apparent from FIG. 2, the slit 15 is the other main when viewed from the slit opening OP1 side on the one main surface side of the disk-shaped body 11 in the direction perpendicular to the main surface of the disk-shaped body 11. The slit opening OP2 on the surface cannot be confirmed.

According to such a configuration, with the above-described configuration, the vibration of the disk-shaped body 11 caused by the friction between the rotary saw body 10 and the work material can be attenuated, and the circumferential direction of the disk-shaped body 11 can be reduced. It is possible to attenuate the vibration propagating along and the vibration propagating in the radial direction, thereby reducing noise. Further, since the vibration is attenuated, the cutting edge related to cutting or cutting passes through the same track with a smaller swing width. Therefore, the width of the cutting margin does not increase, the variation in the cutting position is reduced, and the saw blade replacement cycle can be extended.
In FIG. 2, each slit is provided such that the distance between the center of the hole and the center of the adjacent slit is d4>d3>d2> d1, as shown in FIG.
The slit 15 may be filled with a viscoelastic resin. Since the slit 15 is formed in an oblique direction, the amount of resin filling is increased as compared with the slit entering at a right angle to the main surface of the disk-like body 11, and a vibration damping effect is exhibited. As this viscoelastic resin, polyurethane resin, polyester resin, epoxy resin, or the like is used.

FIG. 3 is another example of the rotary saw according to the present invention, and shows a cross-sectional view taken along line AA of the disk-shaped body 11 of FIG. 1, and a partial cross-section of the disk-shaped body 11 including the slit 15. FIG.
In FIG. 3, the slit 15 has a meandering path, and the slits 15 arranged to face each other are formed by the meandering path. The slit 15 shown in FIG. 3 has an inclined surface with respect to the thickness direction of the disk-like body 11. Specifically, the slits 15 are not parallel to each other from the front surface side 11 a to the back surface side 11 b of the disk-shaped body 11.

  As is apparent from FIG. 3, the slit 15 is the other main when viewed from the slit opening OP1 side on the one main surface side of the disk-shaped body 11 in the direction perpendicular to the main surface of the disk-shaped body 11. The slit opening OP2 on the surface cannot be confirmed. Here, each slit is provided such that the distance between the center of the hole and the center of the adjacent slit is d4> d3> d2> d1, as shown in FIG.

With the configuration described above, as in the example of the disk-shaped body shown in FIG. 2, the vibration of the disk-shaped body 11 caused by the friction between the rotary saw body 10 and the work material can be attenuated. The vibration propagating along the circumferential direction of the body 11 and the vibration propagating in the radial direction can be attenuated to reduce noise.
The slit 15 may be filled with a viscoelastic resin. As this viscoelastic resin, polyurethane resin, polyester resin, epoxy resin, or the like is used.
Although not shown, the slit 15 may be configured by combining the slit 15 shown in FIG. 2 and the slit 15 shown in FIG.

Next, the manufacture of the rotary saw according to the present invention will be described with reference to FIG.
First, the disk-shaped body 11 is prepared. As the disk-shaped body 11, for example, the following is used. That is, a disk-shaped body is made of a steel plate material such as alloy tool steel, carbon tool steel, etc., and serrated blade edges on the outer periphery thereof are formed at equal pitches in the circumferential direction, and each blade edge is made of cemented carbide. The configured one is used.

  Next, a plurality of slits 15 are formed in the disk-like body 11 by the laser beam L by the laser device RE. The slit 15 has a shape in which continuous curves and straight lines are combined, that is, a meandering path, and is arranged to face each other by this meandering path. Each slit 15 has an inclined surface with respect to the thickness direction of the disk-shaped body 11, and the inclined surfaces of the slits 15 facing each other are parallel or non-parallel to each other, and the width is formed to be about 0.2 mm to 0.5 mm. Is done. Further, the length of the slit 15 is appropriately selected in consideration of the strength of the disc-like body 11.

The slit 15 has a meandering shape, but may be, for example, a Z-shaped meandering shape in addition to the U-shaped meandering shape shown in the figure.
When considering that the vibration of the disk-shaped body 11 propagates in the radial direction and the circumferential direction, at least a part of the slit extends from the center of the disk-shaped body 11 toward the circumferential edge, A part may extend along the circumferential direction.
The disk-like body 11 is subjected to heat treatment such as quenching and tempering, and surface grinding is performed. Furthermore, the process of joining a cemented carbide to each blade edge is implemented.

  Next, an embodiment of an electric tool using this rotary saw will be described. FIG. 5 is a perspective view of the electric power tool according to the present invention. In addition, the same code | symbol is attached | subjected about each structure shown by FIGS. 1-3.

In FIG. 5, the electric tool 20 has a base portion 21 that is placed on the upper surface of the work material to be cut, and a rotation that is rotatably attached to the base 21. The saw body 10 is constituted.
More specifically, the rotary saw body 10 is rotatably supported on a rotation shaft (not shown) of the motor 24. The motor 24 is rotatably attached to the support portion 22 via a cover case 23 that covers the upper portion of the rotary saw body 10. Reference numeral 25 denotes a handle, which is integrated with the cover case 23 and the motor 24, and the rotary saw body 10 can be used with the support portion 22 as a fulcrum. A safety cover 26 is disposed below the blade portion 12 of the rotating disk-like body 11 and rotates in synchronization with the operation of the handle 25. A parallel guide 27 is set on the base portion 21 so as to be movable in the horizontal direction.

  A gear case (not shown) is provided on the rotary saw body 10 side, and a gear for decelerating the rotation of the motor 24 is built in the gear case. The rotation of the motor 24 is transmitted to the disk-shaped body 11 through a gear, and the work material can be cut by the rotation of the disk-shaped body 11.

Next, the present invention relates to a machine tool provided with a rotary saw. Embodiments of this machine tool will be described below.
FIG. 6 is a perspective view showing an embodiment of a machine tool, and FIG. 7 is a perspective view showing another embodiment of the machine tool.

First, an embodiment of the machine tool shown in FIG. 6 will be described.
In FIG. 6, a machine tool 100 includes a frame body 101 and a table 102. The frame body 101 is erected on an installation surface such as a floor, and the frame body 101 has a frame shape. A table 102 on which a work material (not shown) is placed is provided.

  The table 102 is provided with an electric saw unit 103 that moves in both directions up and down as indicated by an arrow Y1. The electric saw unit 103 includes an electric motor 104 and a rotary saw 105 that is rotated by the electric motor 104. As the rotary saw 105, the rotary saw 10 shown in FIG. 1 is used.

Further, as shown in FIG. 6, a moving unit 106 for moving the workpiece in the X1 direction is set on the table 102. More specifically, the moving unit 106 includes a moving drive unit 107 that moves the workpiece in the X1 direction, a press fixing bar 108 that presses the workpiece, and a rail 109.
Also in this machine tool 100, the rotary saw 107 uses the rotary saw 10 shown in FIG. 1 as described above, and vibration can be reduced and noise can be reduced.

Next, another embodiment of the machine tool shown in FIG. 7 will be described.
In FIG. 7, a machine tool 200 is provided with an electric saw unit 202 that moves in both directions on a table 201 as indicated by an arrow Y2. The electric saw unit 202 includes an electric motor (not shown) and a rotary saw 203 rotated by the electric motor. The rotary saw 203 shown in FIG. 1 is used as the rotary saw 203.

Further, as shown in FIG. 7, a moving unit 204 for moving the workpiece W in the X2 direction is set in the table 201. More specifically, the moving unit 204 includes a moving drive unit 205 that moves the workpiece W in the X2 direction, and an encoder that measures the amount of movement by which the moving drive unit 205 moves the workpiece W in the X2 direction. 206 and a positioning device 207 for the workpiece W. The table 201 is provided with a groove 208 so that the cutting edge of the rotary saw 203 can be moved.
With the machine tool 200, the rotary saw 203 uses the rotary saw 10 shown in FIG. 1 as described above, so that vibration can be reduced and noise can be reduced.

  While the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. It is easy to change the shape of the present invention to a shape other than that illustrated without changing the basic concept of the present invention, and the present invention includes these expected variations.

DESCRIPTION OF SYMBOLS 10 Rotary saw body 11 Disc-shaped body 12 Blade part 13 Mounting hole 14 Slit 15 Slit 20 Electric tool 21 Base part 22 Support part 24 Motor 25 Handle

Claims (3)

A disk-shaped body, a blade portion provided on an outer periphery of the disk-shaped body, and an area of the disk-shaped body, provided in an intermediate region between the center of the disk-shaped body and the blade section; Consisting of slits that penetrate the front and back surfaces of the body,
The slit has a meandering path, and the slits arranged opposite to each other by the meandering path have an inclined surface with respect to the thickness direction of the disk-shaped body and the inclined surfaces of the opposing slits are The slit openings on the other main surface that are parallel to each other or non-parallel to each other when viewed from the slit opening on one main surface side of the disk-shaped body in the direction perpendicular to the main surface of the disk-shaped body are confirmed. A rotary saw characterized by the inability to do so. A circular saw body supported with respect to the base portion, the circular saw body is an electric tool composed of an electric motor and a rotary saw that is rotationally driven by the electric motor;
The rotary saw includes a disk-shaped body, a blade portion provided on an outer periphery of the disk-shaped body, a region of the disk-shaped body, and an intermediate region between the center of the disk-shaped body and the blade portion. Provided with a slit penetrating the front and back surfaces of the disk-shaped body,
The slit has a meandering path, and the slits arranged opposite to each other by the meandering path have an inclined surface with respect to the thickness direction of the disk-shaped body and the inclined surfaces of the opposing slits are The slit openings on the other main surface that are parallel to each other or non-parallel to each other when viewed from the slit opening on one main surface side of the disk-shaped body in the direction perpendicular to the main surface of the disk-shaped body are confirmed. An electric tool characterized by being unable to do so. A table on which the work material is placed;
A rotary saw protruding from the gap in the table;
An electric motor for rotating the rotary saw,
In a machine tool provided with a rotary saw that cuts the workpiece by relative movement between the table and the rotary saw,
The rotary saw includes a disk-shaped body, a blade portion provided on an outer periphery of the disk-shaped body, a region of the disk-shaped body, and an intermediate region between the center of the disk-shaped body and the blade portion. Provided with a slit penetrating the front and back surfaces of the disk-shaped body,
The slit has a meandering path, and the slits arranged opposite to each other by the meandering path have an inclined surface with respect to the thickness direction of the disk-shaped body and the inclined surfaces of the opposing slits are The slit openings on the other main surface that are parallel to each other or non-parallel to each other when viewed from the slit opening on one main surface side of the disk-shaped body in the direction perpendicular to the main surface of the disk-shaped body are confirmed. A machine tool equipped with a rotary saw characterized by inability.

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