JP2007276066A - Saw blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saw blade capable of maintaining primary thermally refined quality without generating distortion, vibration, bend cutting and breakage by largely reducing a heat amount which a disc shape substrate of a saw blade body suffers, and being inexpensively manufactured even if the disc shape substrate is large in size. <P>SOLUTION: A plurality of segments 6 where a plurality of hard abrasive grains 7 of diamonds are bonded by brazing are jointed by a laser welding or brazing joint to the outer peripheral end 5 of the disc shape substrate 2 as the saw blade body. The disc shape substrate 2 can maintain primary thermally refined quality without receiving high heat in excess of an allowable range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a saw blade used for cutting, for example, stone, refractory brick, cast iron pipe, concrete, and the like.

Conventionally, for example, a disk-shaped saw blade that rotates with a predetermined rotational power when cutting a rigid material such as a stone, a refractory brick, a cast iron pipe, concrete, or the like is generally used.

  In a conventional saw blade, for example, a plurality of segments containing a granular super-hard body are brazed to the outer periphery of a rotating substrate as a saw blade body, and the outer peripheral side including both the brazed portions of the substrate is brazed to both sides. A saw blade is known in which an abrasion-resistant coating layer is provided (see, for example, Patent Document 1).

Japanese Laid-Open Patent Publication No. 2004-58200

However, the conventional saw blade has a problem that the amount of hard abrasive grains to be used increases and the cost increases because the segment contains an ultra-hard body (that is, hard abrasive grains).

  On the other hand, a manufacturing method of brazing a plurality of diamond hard abrasive grains to a segment is generally known. In that case, a rotating substrate (disk-shaped substrate) as a saw blade main body has a high heat of several hundred degrees. Placed in an environment that reaches. When the substrate (disk-shaped substrate) is placed in a high-heat environment, distortion may occur or toughness may be lost due to heating.

  When the substrate (disk-shaped substrate) as the main body of the saw blade is distorted, the substrate cannot be rotated properly, and vibration may be generated during cutting or may not be cut straight. On the other hand, when the substrate (disk-shaped substrate) as the saw blade body loses its toughness and rigidity, the substrate may be bent or damaged during cutting.

  In addition, when brazing a plurality of diamond hard abrasive grains to a large substrate (disk-shaped substrate) as a saw blade body, there is a problem that a large furnace is required and extremely expensive.

Therefore, the present invention greatly reduces the amount of heat that the disc-shaped substrate can suffer when manufacturing the disc-shaped substrate as the saw blade body, so that distortion, vibration, bending, breakage, etc. do not occur. An object of the present invention is to provide a saw blade capable of maintaining the original tempered quality. Another object of the present invention is to provide a saw blade that can be manufactured at low cost without the need for a large furnace or the like even if the disk-shaped substrate as the saw blade body is large. And

In order to solve the above problems, the present invention is characterized in that a plurality of segments to which a plurality of hard abrasive grains are attached in a separate process are joined to the outer periphery of a disc-shaped substrate as a saw blade body. It is a saw blade.

  Further, the present invention is the saw blade, wherein the disk-shaped substrate is configured by laminating a plurality of disk-shaped steel plates.

  Further, the present invention is the saw blade, wherein the plurality of segments are joined to the outer periphery of the disk-shaped substrate by laser welding.

  Furthermore, the present invention is the saw blade, wherein the plurality of segments are joined to the outer periphery of the disk-shaped substrate by brazing.

  According to the present invention, in manufacturing, the amount of heat that the disc-shaped substrate as the saw blade body can suffer is greatly reduced, so that the occurrence of distortion, vibration, bending, breakage, etc. during saw blade cutting work is prevented. And maintain the tempered quality of the original saw blade.

  In addition, according to the present invention, even if the disk-shaped substrate as the saw blade body is large, the segments are in an independent state, so that the saw blade can be manufactured at low cost without requiring equipment such as a large furnace. Can be produced.

  Furthermore, according to the present invention, when the disc-shaped substrate as the saw blade body is configured by laminating a plurality of circular steel plates, there is no vibration during the cutting operation, and the silencing effect can be increased. .

Hereinafter, the present invention will be described based on examples thereof with reference to the drawings.
FIG. 1 is a top view illustrating an external configuration of the saw blade according to the first embodiment when viewed from above, and FIG. 2 is a cross-sectional view illustrating a cross-sectional configuration along the line AA in FIG.

   Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the saw blade 1 according to the first embodiment includes a disk-shaped substrate 2 as a sorbed blade body.

  The disk-shaped substrate 2 is composed of a metal plate made of disk-shaped iron, aluminum, or the like. As shown in FIG. 1, a rotation drive source (not shown) is provided at the center of the disk-shaped substrate 2. An opening 3 is formed for mounting on the rotating shaft. Further, as shown in FIG. 1, a plurality of slits 4 are formed radially on the outer peripheral side of the disk-shaped substrate 2.

  As shown in FIGS. 1 and 2, a segment 6 is joined to the outer peripheral edge 5 between the radial slits 4 of the disk-like substrate 2.

  Each segment 6 is a process different from the manufacturing process of the disk-shaped substrate 2. For example, a plurality of diamond hard abrasive grains 7 are brazed on the outer surface in advance as shown in FIGS. 1 and 2. It is attached. There are no particular restrictions on the configuration of the apparatus for brazing the hard abrasive grains 7 to the segments 6 and the brazing method, that is, any apparatus and method may be used.

  In the process of brazing the hard abrasive grains 7 to the segments 6, the brazing processing of the hard abrasive grains 7 is performed in a state where each segment 6 is separated as a separate body from the disk-like substrate 2. Done. Therefore, there is no influence of high heat on the disk-shaped substrate 2, and the brazing of the diamond hard abrasive grains 7 can be efficiently performed on each segment 6 under an optimal high heat environment.

  On the other hand, when joining each segment 6 to the outer peripheral edge 5 between each radial slit 4 of the disk-shaped substrate 2, any joining method of laser welding, brazing, or welding may be used.

  On the other hand, when using, for example, a brazing technique for joining the segments 6 to the respective outer peripheral edges 5 of the disc-like substrate 2, although not shown in detail, the disc-like substrates 2 and the segments 6 are connected to the front and rear surfaces of the joining positions. There is an aspect in which an appropriate step-shaped depression is formed on the edge. In other words, each segment 6 is bonded so that the front and back surfaces of the disk-shaped substrate 2 become flat by fixing a brazing material in a space region when the recesses are bonded. However, when the thickness of each segment 6 is thicker than the thickness of the disk-shaped substrate 2, the recess of the circular substrate 2 is not necessarily required.

  In the first embodiment, in the case where, for example, diamond hard abrasive grains 7 are brazed to the outer surface of the segment 6, the segment 6 has no physical relationship with the disc-shaped substrate 2. There is. For this reason, the disk-shaped substrate 2 is not adversely affected by high heat at all, and as a result, the conditioned high quality of the disk-shaped substrate 2 can be easily maintained.

  That is, since the saw blade 1 shown in the first embodiment is not adversely affected by high heat, for example, when cutting a rigid material such as a stone material, a refractory brick, a cast iron pipe, or concrete, the disc-like substrate 2 is strained, Vibration, bending, breakage, etc. do not occur, and straight cutting functionality can be maintained over a long life.

  In particular, even when the segment 6 is joined to the outer periphery of the disk-shaped substrate 2, since any one of laser welding, brazing, or welding is used, the amount of heat applied to the disk-shaped substrate 2 has no adverse effect. It is. Also from this point of view, the saw blade 1 does not cause distortion, vibration, bending, breakage, etc. in the disc-like substrate 2 during the cutting operation of the rigid material, and the function of straight cutting has a long life. Can be maintained over time.

  On the other hand, in the saw blade 1 shown in the first embodiment, when the hard abrasive grains 7 are brazed to the segment 6, the segment 6 is separated as a single unit, so that the disc-shaped substrate 2 as the saw blade body is large. Even if it exists, equipment, such as a large-sized furnace, is unnecessary, and it can manufacture cheaply as a whole. In addition, the segment 6 is brazed with, for example, diamond hard abrasive grains 7 to the outer surface thereof, so that the amount of hard abrasive grains 7 used is small compared to the case where the hard abrasive grains 7 are contained. Manufacturing cost can be reduced.

  Next, a second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, the saw blade 11 according to the second embodiment is configured by laminating a plurality of disk-shaped steel plates 13 and 13 on a disk-shaped substrate 12 as a saw blade body. There are no particular restrictions on the method of laminating the disk-shaped steel plates 13, 13, that is, any laminating method may be used.

The outer peripheral edge 14 of the disk-shaped substrate 12 configured by stacking a plurality of disk-shaped steel plates 13, 13 is aligned so as to be, for example, the same surface, and the entire outer peripheral edge 14 between the slits 4. The segments 6 are joined. As for the joining method, as described above, any joining method of laser welding, brazing, or welding may be used.
Further, a layer of resin, rubber or the like (not shown) may be provided between the steel plates 13 and 13.

  Further, in the case where a brazing technique is used for joining the disc-like substrate 12 formed by laminating a plurality of disc-shaped steel plates 13 and 13 and the segment 6, the disc-like shape is the same as described above. A mode in which appropriate stepped depressions for brazing are formed on the front and back edges of the bonding positions of the substrate 12 and the segment 6 may be adopted.

  In the second embodiment, in addition to the effects shown in the first embodiment, the disk-shaped substrate 12 is formed by laminating a plurality of disk-shaped steel plates 13, 13. There is no vibration and an effect of increasing the noise reduction effect.

It is a top view explaining the structure of the top view of the saw blade which concerns on Example 1 of this invention. It is sectional drawing explaining the structure of the cross sectional view of the saw blade which concerns on Example 1 of this invention. It is sectional drawing explaining the structure of the cross sectional view of the saw blade which concerns on Example 2 of this invention.

Explanation of symbols

1,11 Saw blade 2,12 Circular substrate

3 Opening 4 Slit 5, 14 Outer peripheral edge 6 Segment 13 Steel plate

Claims (4)

A saw blade characterized in that a plurality of segments to which a plurality of hard abrasive grains are attached in a separate step are joined to the outer periphery of a disk-shaped substrate as a saw blade body. The saw blade according to claim 1, wherein the disk-shaped substrate is formed by laminating a plurality of disk-shaped steel plates. The saw blade according to claim 1 or 2, wherein the plurality of segments are joined to the outer periphery of the disk-shaped substrate by laser welding. The saw blade according to claim 1 or 2, wherein the plurality of segments are joined to the outer periphery of the disk-shaped substrate by brazing.

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