JPH0539861U - Diamond tools - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a diamond tool capable of uniform dressing without center deviation when attaching a diamond abrasive grain layer to a base metal. [Structure] The diamond tool according to the present invention has a base metal 11
The diamond bit D has a diamond tip 12 as a diamond abrasive grain layer attached to the tip 13 of the diamond bit D. Then, the tip portion 13 of the base metal 11 is formed of a flat surface 15 and a sloped surface 16 that is continuous with the flat surface 15, and the base metal attachment portion 19 of the diamond tip 12 is the front end portion 13 of the base metal 11.
The plane 17 and the slope 18 corresponding to the plane 15 and the slope 16 of
The base metal attaching part 19 of the diamond abrasive grain layer is brazed to the tip part 13 of the base metal 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a diamond tool, and more particularly to a diamond tool used for drilling and cutting hard and brittle materials such as concrete and stone.

[0002]

[Prior Art]

 Conventionally, for example, in a diamond bit D as shown in FIGS. 8 and 9, the diamond tip 52 is attached to the flat surface 55 of the tip portion of the base metal 51 by using fixing means such as brazing (in FIG. 9, Reference numeral 60 is a brazing part). That is, the tip of the base metal 51 is formed into a flat surface 55, and the diamond tip 52 is brazed onto the flat surface 55 by using a tip mounting jig (not shown).

[0003]

[Problems to be solved by the device]

 However, since the tip portion of the base metal 51 is the flat surface 55, the center positions of the diamond chip 52 and the mounting surface 57 of the base metal 51 are displaced at the time of mounting, and as shown in FIG. Since the diamond tip 52 is not equidistant from the diamond tip 52, a part of the attached diamond tip 52 is fixed to another diamond tip with a variation (step Z). Sometimes it happened. When such a diamond bit D is dressed (targeted), since the diamond tip has a step, the dented diamond tip (that is, the diamond tip or the diamond tip portion located near the center of the base metal) is dressed. There is an inconvenience that the product value is lost without being marked.

An object of the present invention is to provide a diamond tool that can be dressed uniformly without center deviation when attaching a diamond abrasive grain layer to a base metal.

[0005]

[Means for Solving the Problems]

 The diamond tool according to the present invention is a diamond tool in which a diamond abrasive grain layer is attached to the tip of a base metal, and the tip of the base metal is formed of a flat surface and an inclined surface continuous with the flat surface. The base metal attachment portion of the grain layer is formed on a flat surface and a slope surface corresponding to the flat surface and the slope surface of the front end portion of the base metal, and the base metal attachment portion of the diamond abrasive grain layer is formed on the front end portion of the base metal. Is fixed by brazing or the like.

[0006]

[Action]

 In the present invention, the tip of the base metal is formed of a flat surface and an inclined surface continuous with the flat surface, and the base metal attachment portion of the diamond abrasive grain layer is flat and corresponds to the flat surface and the sloped surface of the base metal. Surface and slope, and the base metal tip of the base metal is brazed to the base metal attachment part of the diamond abrasive grain layer.Therefore, the plane and slope of the base metal tip and the dashes corresponding to these planes and slopes are formed. The flat surface and the inclined surface of the base metal attachment portion of the earmond abrasive grain layer can ensure the positioning, so that center deviation does not occur. Further, since the flat surface formed at the tip of the base metal and the flat surface formed at the base metal attachment portion of the diamond abrasive grain layer are attached to each other, the diamond abrasive grain layer is attached to the base metal. It can be mounted horizontally as before. In this way, there is no center deviation and uniform dressing can be achieved.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The parts, arrangements, etc. described below do not limit the present invention and can be variously modified within the scope of the present invention. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view of a diamond bit, FIG. 2 is an enlarged view showing a mounting state of a diamond tip, and FIG. 3 is A- of FIG. It is an A line sectional view.

As shown in FIG. 1, a diamond bit D as a diamond tool of this example includes a cylindrical base metal 11 and a diamond tip 12 as a diamond abrasive grain layer, and a tip portion 13 of the base metal 11. A plurality of diamond tips 12 are attached to the above with a predetermined interval 14. Further, as shown in FIG. 2, the tip portion 13 of the base metal 11 of the present example has a flat surface 15 formed on the front end surface in accordance with the curve of the cylindrical base metal 11 from the inside of the base metal 11. A slope 16 is formed continuously with the flat surface 15 toward the outer surface of the base metal 11. The width (thickness) X of the diamond tip 12 of this example is a rectangular tip formed to be thicker than the width (thickness) Y of the base metal 11 and curved in accordance with the curved shape of the cylindrical base metal 11. As shown in FIGS. 2 and 3, a base metal attachment portion 19 is formed on one surface of the diamond tip 12.

In the base metal attaching portion 19 of this example, a plane 17 is formed to include the center position of the diamond tip 12 in correspondence with the plane 15 and the slope 16 of the tip portion 13 of the base metal 11. A slope 18 is formed continuously with one side on one side. Then, the flat surface 15 and the sloped surface 16 of the base metal 11 are brought into contact with the flat surface 17 and the sloped surface 18 of the base metal mounting portion 19 of the diamond tip 12, respectively, and the tip end portion 13 of the base metal 11 and the base metal mounting of the diamond tip 12 are mounted. The part 19 is brazed. Reference numeral 20 is a brazing part.

According to this structure, the boundary point 21 between the flat surface 15 of the tip portion 13 of the base metal 11 and the slope surface 16 and the flat surface 17 and the slope surface 18 of the base metal attachment portion 19 of the diamond tip 12 are connected. The boundary points 22 and 22 act as positioning points, respectively, so that accurate brazing can be performed. Especially, in the diamond bit D used for the core drill and the diamond hole saw, the peripheral speeds on the inner diameter side and the outer diameter side are different. Therefore, when configured as in this example, the area of the diamond tip 12 on the outer diameter side becomes large. , More preferred.

4 and 5 show a second embodiment of the present invention. Compared to the first embodiment, in this embodiment, the shape of the tip portion 23 of the base metal 11 and the shape of the base metal attachment portion 29 of the diamond tip 12 are different, and the others are the same. That is, as shown in FIGS. 4 and 5, the base metal 11 of this example has a flat surface 25 formed in the center of the tip portion 23, and slopes 26, 26 formed on both sides of the flat surface 25. Are doing

Further, the base metal attachment portion 29 of the diamond tip 12 is formed in a reverse concave cross section, the central bottom surface of the reverse concave cut surface is formed in a flat surface 27, and slopes 28, 28 are formed continuously from the flat surface 27. Has been done. The flat surface 27 and the inclined surfaces 28, 28 are formed in alignment with the tip portion 23 of the base metal 11.

According to the structure of this example, similar to the above-described example, not only positioning is possible, but also the flat surface 25 located between the slopes 26 formed on the tip portion 23 of the base metal 11 and the base metal removal. Since the flat surfaces 27 located between the inclined surfaces 28 formed on the attachment portion 29 are aligned with each other, positioning can be performed more easily and reliably than in the above-described embodiment.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, a disk-shaped diamond blade is used in contrast to the second embodiment in which the saw is used. It shows an applied example. That is, a plurality of diamond tip attachment portions 33, which are the tip end portions of the base metal 31, are formed at the outer peripheral position of the disk-shaped base metal 31 with a gap 32 therebetween. Similar to the second embodiment, it has a chevron shape in cross section in which a flat surface 35 and slopes 36 (only one of which is shown) are formed on both sides of the flat surface 35. Then, the diamond chip 34 is attached to the diamond tip attachment portion 33. The diamond tip 34 is formed so as to be curved so as to be aligned with the diamond tip attachment portion 33. Similar to the example, it is formed in a reverse concave shape.

According to this structure, even when applied to a disk-shaped diamond blade, the same operational effect as that of the above-described embodiment is obtained, and the position of the flat surface 35 of the diamond tip 34 is set at the central position of the base 31. Yes, the left and right balance is maintained and cutting performance does not change.

FIG. 7 shows a fourth embodiment of the present invention. In the first and second embodiments, rectangular diamond tips are used, but in this embodiment, an annular diamond is used. It shows an example in which the layer 41 is attached to the base metal 11. Others are the same as those in the first embodiment and the second embodiment. In FIG. 7, reference numeral 42 is a notch groove for movement of cutting chips, etc., which is formed at two places in this example, but is not limited to this, and it is formed at two or more places. Is also good.

[0017]

[Effect of the device]

 As described above, according to the present invention, the positioning is ensured by the flat surface and the slope of the tip of the base metal and the flat surface and the slope of the base metal attachment portion of the diamond abrasive grain layer corresponding to the flat surface and the slope. Since it can be set, center deviation does not occur. Also, since the flat surface formed on the tip of the base metal and the flat surface formed on the base metal attachment portion of the diamond abrasive grain layer are mounted in contact with each other, the diamond abrasive grain layer is attached to the base metal in the same manner as in the past. It can be mounted horizontally. In this way, center misalignment between the base metal and the diamond abrasive grain layer, and the diamond abrasive grain layer is eliminated, and uniform dressing can be performed, so that a dressing failure does not occur and a diamond tool with high commercial value can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a diamond bit according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a partially enlarged perspective view similar to FIG. 2, showing a second embodiment of the present invention.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a partial side view showing a third embodiment of the present invention.

FIG. 7 is a perspective view showing a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional example.

9 is a sectional view taken along line CC of FIG.

FIG. 10 is a partial plan view of FIG.

[Explanation of symbols]

11,31 Base metal 12,34,41 Diamond abrasive grain layer (diamond tip) 13 Tip part 15,25,35 Flat surface 16,26,36 Slope surface 17,27 Flat surface 18,28 Slope surface 19 Base metal attachment part 20 Brazing Part 21, 22 Positioning point (boundary point) D Diamond tool (diamond bit, diamond blade)

Claims (1)

[Scope of utility model registration request] 1. A diamond tool having a diamond abrasive grain layer attached to the tip of a base metal, wherein the tip of the base metal is formed of a flat surface and an inclined surface continuous with the flat surface, and a base of the diamond abrasive grain layer. A gold attachment part is formed on a flat surface and a sloped surface corresponding to the plane and slope of the tip of the base metal, and the base attachment part of the diamond abrasive grain layer is brazed to the tip of the base metal by brazing or the like. A diamond tool characterized by being fixed.