JP2006247753A - Diamond brazed tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diamond brazed tool having a long life, good sharpness and high working accuracy by fixing a crystal surface of diamond crystal grain to a fitting surface having a predetermined angle by brazing so that the ridge shared by a plurality of crystal surfaces of diamond is projected to the nearest position to a material to be cut. <P>SOLUTION: The fitting surface 12 formed on a base metal 11 of the diamond brazed tool 10 has a predetermined angle 17 to the advancing direction of the base metal 11, an adhesive is coated on the fitting surface 12, and a plurality of diamond crystal grains 13 and brazing filler metal 15 are sprayed or injected. The brazing filler metal 15 is fused by the action of brazing heat so that the crystal surface 13a of the diamond crystal grain 13 is fixed parallel to the fitting surface 12. The ridge (the projecting part) 13c on the crystal surface 13b located at the symmetrical azimuth with the fixed crystal surface 13a is located at the nearest position to the material 16 to be cut, and working is performed with the ridge (the projecting part) 13c always in contact with the material 16 to be cut. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a diamond brazing tool used for cutting, cutting and drilling of stone, concrete, steel, and the like.

Conventionally, for example, JP-A-2002-273657 (Patent Document 1) has proposed a dresser for CMP processing. The above-mentioned conventional example is caused by chipping of the abrasive grains by reducing the protrusion height of the abrasive grains and the variation of the contact surface in a dresser for dressing a polishing cloth used for surface finishing of a semiconductor wafer or the like by CMP processing. The object is to prevent micro-scratch rusting of an object to be polished, and this is achieved by arranging specific crystal faces of diamond crystal grains in a specific direction.
Here, the specific crystal plane is the (111) plane of the crystal plane of the diamond crystal grains (all (111) planes are collectively referred to as {111} plane). That is, by aligning the {111} plane of the crystal plane of the abrasive grains with an inclination of 15 to 75 degrees with respect to the grinding surface, the surface having the high strength of the abrasive grains contacts the abrasive cloth W abrasive grains at an angle. Effectively dressing. In particular, in order to dispose the specific crystal plane of the abrasive grains at an angle of 15 to 75 degrees, a groove having a specific angle is provided at a predetermined position on the base material, and this groove is ground with a handset. Arrange the grains. Thereby, it is said that, together with effective dressing, chipping of abrasive grains hardly occurs, and generation of micro scratches on the object to be polished is prevented.
JP 2002-273657 A

Therefore, the present invention is such that the crystal face of the diamond crystal grains is brazed to a mounting face having a predetermined angle so that the edge shared by the plurality of crystal faces of diamond protrudes to the closest position to the work material. An object of the present invention is to provide a diamond brazing tool having a long life, good sharpness, and high machining accuracy by being fixed.

The present invention of claim 1 comprises a diamond crystal grain in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, and a brazing material made of a plurality of the diamond crystal grains and hard solder is distributed on the upper surface of the adhesive applied to the mounting surface, Or the adhesive is decomposed and disappeared by the action of heat of brazing using the brazing material, the brazing material is melted, and the crystal planes of the diamond crystal grains are fixed parallel to the mounting surface, The diamond brazing tool is characterized in that a ridge shared by a plurality of crystal faces of diamond crystal grains is projected at a position close to a work material.

According to a second aspect of the present invention, the powdery brazing material is spread on the upper surface of the adhesive, and then a plurality of diamond crystal grains are spread, and the adhesive is decomposed by the action of heat of the brazing. The diamond brazing tool according to claim 1, wherein the brazing material is melted and melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface.

According to a third aspect of the present invention, a plurality of the diamond crystal grains are distributed on the upper surface of the adhesive, and then the brazing material in powder form is distributed, or the brazing material in paste form is injected, and the brazing material is injected. 2. The diamond brazing tool according to claim 1, wherein the adhesive is decomposed and disappeared by the action of heat of brazing, the brazing material is melted, and the crystal planes of the diamond crystal grains are fixed parallel to the mounting surface. .

The present invention of claim 4 comprises a diamond crystal grain in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, a brazing material made of hard braze is mixed with an adhesive and applied to the mounting surface, and then a plurality of the diamond crystal grains are distributed. The adhesive is decomposed and disappeared by the action of heat of brazing using the brazing material, the brazing material is melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface, and the diamond crystal A diamond brazing tool characterized in that a ridge shared by a plurality of crystal planes of grains protrudes to a position close to a work material.

The present invention of claim 5 comprises a diamond crystal grain in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, and a brazing material made of hard solder and a plurality of the diamond crystal grains are mixed with an adhesive and applied to the mounting surface, and the brazing material The adhesive is decomposed and disappears by the action of heat of brazing using the solder, the brazing material is melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface, and a plurality of crystals of the diamond crystal grains The diamond brazing tool is characterized in that a ridge shared by a surface is projected at a position close to a work material.

According to the present invention, as shown in FIGS. 1a to 1c, the crystal structure of diamond (artificial) is composed of a plurality of crystal faces to form a regular polyhedron. Further, as shown in FIG. 1a, in the case of a face-centered cubic crystal, for example, when the crystal plane (001) plane 3 comes into contact with the base metal, the crystal plane (001) plane 2 appears on the surface of the tool. The same applies to the {11c} plane 4a shown in FIG. 1b. Further, as shown in FIG. 1c, the same condition is obtained for the crystal plane {111c} plane 4b even in the case of hexagonal crystal.
In brazing diamond crystal grains, when the brazing material 5 is melted in the state shown in FIG. 1e, the crystal grains of A are all like B crystal grains as shown in FIG. Since the crystal plane 8 is fixed in parallel to the mounting surface 7 of the base metal 6, when the mounting surface 7 is parallel to the traveling direction of the base metal 6, the ridge (cutting blade) 8 b protrudes from the work material. The sharpness gets worse. However, as shown in FIG. 1 f, also in the case of the mounting surface 9 having a predetermined angle (α) with the traveling direction of the base metal 6, the crystal plane 8 is fixed in parallel to the mounting surface 9, so The cutting edge 8a is projected to the closest position to the work material, and the sharpness is improved.

According to the present invention of claim 1, as shown in FIGS. 2 a to 2 c, the diamond brazing tool 10 includes a diamond crystal grain 13 in which a plurality of crystal faces form a regular polyhedron, and the diamond crystal grain 13 is fixed. The mounting surface 12 has a predetermined angle 17 with respect to the traveling direction of the base 11, the adhesive 14 is applied to the mounting surface 12, and the upper surface of the adhesive 14 is formed. A plurality of diamond crystal grains 13 and a brazing filler metal 15 made of hard solder are spread or injected. Next, as shown in FIG. 2 d, the adhesive 14 is decomposed and disappeared by the action of the heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal plane 13 a of the diamond crystal grains 13 becomes Affixed to the mounting surface 12. As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 16.
For this reason, it has a long life and good sharpness, and the precision and processing efficiency of grinding and cutting are improved.

According to the present invention of claim 2, as shown in FIGS. 5 a to 5 c, a powdery brazing material 15 made of hard solder is spread on the upper surface of the adhesive applied to the mounting surface 22, and then a plurality of the brazing materials 15 are distributed. Individual diamond crystal grains 13 are distributed. As shown in FIG. 5 d, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal planes of the diamond crystal grains 13 are fixed to the mounting surface 22. Is done. Thereby, the ridge (projection) 13 c formed from a plurality of crystal faces of the diamond crystal grain 13 is positioned at a position closest to the work material 26.
For this reason, it has a long life and good sharpness, and the precision and processing efficiency of grinding and cutting are improved.

According to the third aspect of the present invention, as shown in FIGS. 6a to 6c, a plurality of diamond crystal grains 13 are distributed on the upper surface of the adhesive 14 applied to the mounting surface, and then consist of hard solder. Powdery brazing material 15 is distributed or paste brazing material 15 made of hard brazing is injected, and adhesive 14 is decomposed by the action of heat of brazing using brazing material 15, as shown in FIG. 6d. Then, the brazing material 15 is melted and the crystal surface 13a of the diamond crystal grain 13 is fixed in parallel to the mounting surface 32.
As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 36.
For this reason, it has a long life and good sharpness, and the precision and processing efficiency of grinding and cutting are improved.

According to the present invention of claim 4, as shown in FIGS. 8 a to 8 c, the diamond brazing tool 40 includes a diamond crystal grain 13 in which a plurality of crystal faces form a regular polyhedron, and the diamond crystal grain 13 is fixed. The mounting surface 42 has a predetermined angle 17 with respect to the traveling direction of the diamond crystal grains 13, and the brazing material 15 made of hard braze is mixed with the adhesive 14 and mounted. A plurality of diamond crystal grains 13 are then applied to the surface 42, and then, as shown in FIG. 8d, the adhesive 14 is decomposed and disappears by the action of the heat of brazing using the brazing material 15, and the brazing material. 15 is melted, and the crystal surface 13 a of the diamond crystal grain 13 is fixed in parallel to the mounting surface 42. As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 46.
For this reason, it has a long life and good sharpness, and the precision and processing efficiency of grinding and cutting are improved.

According to the present invention of claim 5, as shown in FIGS. 9 a to 9 c, the diamond brazing tool 13 includes a diamond crystal grain 13 in which a plurality of crystal faces form a regular polyhedron, and the diamond crystal grain 13 is fixed. The mounting surface 52 has a predetermined angle 17 with respect to the traveling direction of the diamond crystal grains 13, and the brazing material 15 made of hard brazing and the plurality of diamond crystal grains 13 are formed. The adhesive 14 is mixed and applied to the mounting surface 52, and as shown in FIG. 9d, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, and the brazing material 15 is melted. The crystal surface 13 a of the diamond crystal grain 13 is fixed in parallel to the mounting surface 52. As a result, a ridge (protrusion) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 56.
For this reason, it has a long life and good sharpness, and the precision and processing efficiency of grinding and cutting are improved.

Hereinafter, the present invention will be described with reference to the drawings based on the embodiments.
In one embodiment of the diamond brazing tool of the present invention, as shown in FIGS. 2a and 2b, the mounting surface 12 to which diamond crystal grains 13 in which a plurality of crystal faces form a regular polyhedron is fixed is a disk shape. The gear-shaped groove 12a having a predetermined angle 17 with respect to the traveling direction of the base metal 11 and having a substantially V-shaped cross section is parallel to the rotation center axis 18 of the base metal and the outer periphery of the base metal 11 It is formed continuously over the surface 11b. Further, as shown in FIG. 2 e, the diamond crystal grains 13 are arranged in a plurality of rows in the thickness direction of the base metal 11. The traveling direction of the base metal 11 is perpendicular to the rotation center axis 18 of the base metal 11.

Next, as shown in FIG. 2 c, the mounting surface 12 has a predetermined angle 17 with the traveling direction (arrow) of the base metal 11, and the adhesive 14 is applied to the mounting surface 12, and the upper surface of the adhesive 14. A plurality of diamond crystal grains 13 and a brazing filler metal 15 made of hard solder are spread or injected. Further, as shown in FIG. 2 d, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal surface 13 a of the diamond crystal grain 13 becomes the mounting surface. 12 is fixed. As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 16.
That is, the diamond crystal grains 13 are formed such that 13 c that is one ridge of the crystal face 13 b located in a symmetric orientation with the crystal face 13 a of the diamond crystal grain 13 protrudes to the position closest to the work material 16. The predetermined angle 17 is maintained and regularly arranged, and the ridge (projection) 13c of the crystal face 13b is always brought into contact with the work material 16 for processing.
For this reason, the diamond brazing tool has strong fixation of diamond crystal grains, has a long life and good sharpness, and improves the precision and processing efficiency of grinding and cutting.

  The adhesive 14 is used for the purpose of temporarily fixing the diamond crystal grains 13 and the brazing material (powder) 15 to the base metal 11, and is decomposed and disappears when heated, and the brazing material 15 is melted and diamond crystals are melted by “wetting”. The grains 13 are fixed to the base metal 11 and then cooled to work as a brazing material 15. The material of the adhesive 14 is preferably a material that has viscosity at a low temperature and decomposes at a high temperature, and can be selected in consideration of work conditions such as chemical glue, paraffin, polyethylene glycol, and mineral oil. Depending on the situation of work, for example, pure water can also be used as the adhesive 14 only when the diamond crystal grains 13 are attached to a horizontally placed plane.

The brazing method using hard brazing is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. Depending on the material, dimensions, and shape of the disc-shaped base metal 11, the work efficiency, required quality (strength), and the like can be set.
The brazing filler metal 15 in brazing using a hard brazing is preferably a silver brazing or copper brazing containing Ti, but an Ag—Cu—Ni brazing, Cu—Mn—Ni brazing, or Ni—Cr—B—Si brazing. Wax etc. are also used.
The material of the disk-shaped base metal 11 is preferably tool steel containing Ti, but hard materials such as sintered metals and ceramics can also be applied, and are not limited depending on the application. Further, as shown in FIG. 2e, the thickness of the layer of diamond crystal grains 13 constituting the cutting edge surface 11a is preferably one crystal grain.
For this reason, the diamond brazing tool has a high base metal strength and does not drop diamond crystal grains, and has a long life.

Further, since the cutting edge surface 11a composed of diamond crystal grains is formed on the outer peripheral surface of the base metal, and the rotation center axis of the base metal and the traveling direction of the base metal are orthogonal, the diamond brazing tool 10 is used for surface grinding. It can be used for a wheel (horizontal type), a milling wheel for road surface groove processing, and the like.

As shown in FIGS. 3a to 3d, the diamond brazing tool mounting surface 12 according to the present invention has a wave-like cross-sectional shape of the groove (the direction of the groove and the rotation of the base metal) depending on the shape of the mounting surface. The angle θ formed by the direction forms a right angle (FIG. 3a), the same oblique gear shape (the angle θ is relatively large when the angle θ is less than a right angle) (FIG. 3b), and the screw shape (the angle θ is less than 0 ° and relatively relatively (Small) (FIG. 3c), knurled (formation of depressions or protrusions having slopes on the outer peripheral surface of the base metal) (FIG. 3d), and the like.

One modification of the embodiment of the diamond brazing tool of the present invention is a saw blade in which the thickness of the base metal 11 in FIG. 2b is extremely thin, as shown in FIG. 4a.
In addition, as shown in FIG. 4b, another modification of the embodiment includes a cylindrical grinding wheel, an inner peripheral grinding wheel, and a honing in which the rotation center axis of the base metal and the traveling direction of the base metal are parallel to each other. A whetstone or the like.

In another embodiment of the diamond brazing tool of the present invention, as shown in FIGS. 5a to 5c, the mounting surface 22 to which the diamond crystal grains 13 in which a plurality of crystal faces form a regular polyhedron is fixed is a disk. 5 is formed of four inclined surfaces 22 facing each other at a predetermined angle 17 with respect to the tangential direction on the outer peripheral surface 21b of the base metal 21, and the cross-sectional shape is substantially as shown in FIGS. 5b and 5e. A plurality of recesses 22 a having a V shape are continuously provided over the outer peripheral surface 21 b of the base metal 21. The traveling direction of the base metal 21 is parallel to the rotation center axis 28 of the base metal 21.

Next, as shown in FIG. 5 c, the adhesive 14 is applied to the mounting surface 22, and a powdery brazing material 15 made of hard solder is spread on the upper surface of the adhesive 14, and then a plurality of diamond crystal grains 13 is distributed. Further, as shown in FIG. 5 d, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal surface 13 a of the diamond crystal grain 13 becomes the mounting surface. It is fixed in parallel with 22.
As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 26.
That is, as shown in FIG. 5 d, 13 c, which is one ridge of the crystal surface 13 b located in a symmetric orientation with the crystal surface 13 a of the diamond crystal grain 13, protrudes to the closest position to the work material 26. As described above, the diamond crystal grains 13 are regularly arranged while maintaining a predetermined angle 17, and the ridges (projections) 13 c of the crystal surface 13 b are always in contact with the work material 26 and processed.
For this reason, the diamond brazing tool has strong fixation of diamond crystal grains, has a long life and good sharpness, and improves the precision and processing efficiency of grinding and cutting.

  The adhesive 14 is used for the purpose of temporarily fixing the diamond crystal grains 13 and the brazing material (powder) 15 to the base metal 21 and decomposes and disappears when heated, and the brazing material 15 melts and “wetting” causes the diamond crystals. The grains 13 are fixed to the base metal 21 and then cooled to work as the brazing material 15. The material of the adhesive 14 is preferably a material that has viscosity at a low temperature and decomposes at a high temperature, and can be selected in consideration of work conditions such as chemical glue, paraffin, polyethylene glycol, and mineral oil. Depending on the situation of work, for example, pure water can also be used as the adhesive 14 only when the diamond crystal grains 13 are attached to a horizontally placed plane.

The brazing method using hard brazing is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. Depending on the material, size, and shape of the disc-shaped base metal 21, the work efficiency, required quality (strength), and the like can be set.
The brazing filler metal 15 in brazing using a hard brazing is preferably a silver brazing or copper brazing containing Ti, but an Ag—Cu—Ni brazing, Cu—Mn—Ni brazing, or Ni—Cr—B—Si brazing. Wax etc. are also used.
The material of the disk-shaped base metal 21 is preferably tool steel containing Ti, but hard materials such as sintered metals and ceramics can also be applied and are not limited depending on the application.
For this reason, the diamond brazing tool has a high base metal strength and does not drop diamond crystal grains, and has a long life.

5d, a cutting edge surface 21a composed of diamond crystal grains 13 is formed on the outer peripheral surface 21b of the base metal 21, and as shown in FIG. 5b, the rotation center axis 28 of the base metal 21 and Since the traveling direction (arrow) of the base metal 21 is parallel, the diamond brazing tool 20 can be used for a cylindrical grinding wheel, an inner circumferential grinding wheel, a honing grindstone, and the like.

Another modification of the diamond brazing tool according to another embodiment of the present invention is that, from the form of the mounting surface 22 formed on the base metal, as shown in FIG. This is a case of a protrusion formed from an inclined surface. Further, as shown in FIGS. 3a to 3c, depending on the form of the mounting surface, the groove cross-sectional shape is a wavy gear (the angle θ formed by the groove direction and the base metal rotation direction is a right angle) (FIG. 3a). ), As shown in FIG. 3b, which is also an oblique gear shape (relatively large when the angle θ is less than a right angle) (FIG. 3b), and is relatively small when the angle θ is less than 0 °. (FIG. 3c).

In another embodiment of the diamond brazing tool of the present invention, as shown in FIGS. 6a and 6b, the mounting surface 32 to which the diamond crystal grains 13 in which a plurality of crystal faces form a regular polyhedron is fixed, A substantially wave-shaped groove 32 a having a predetermined angle 17 with respect to the traveling direction of the tubular base metal 31 is continuously formed radially in the circumferential direction of the end surface 31 b in the direction of the central axis 38 of the base metal 31. Is done. In addition, as shown in FIG. 6 e, the diamond crystal grains 13 are arranged in a plurality of rows in the radial direction of the mounting surface 32.

Next, as shown in FIG. 6 c, the mounting surface 32 has a predetermined angle 17 with the traveling direction (arrow) of the base metal 31, the adhesive 14 is applied to the mounting surface 32, and the upper surface of the adhesive 14. Then, a plurality of diamond crystal grains 13 are distributed, and then a powdery brazing material 15 made of hard brazing is spread, or a paste-like brazing material 15 made of hard brazing is injected. Further, as shown in FIG. 6 d, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal surface 13 a of the diamond crystal grain 13 becomes the mounting surface. It is fixed in parallel with 32.
As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 36.
That is, as shown in FIG. 6 d, 13 c that is one ridge of the crystal surface 13 b located in a symmetric orientation with respect to the crystal surface 13 a of the diamond crystal grain 13 protrudes to the closest position to the work material 36. As described above, the diamond crystal grains 13 are regularly arranged while maintaining a predetermined angle 17, and the ridges (projections) 13 c of the crystal surface 13 b are always in contact with the work material 36 for processing.
For this reason, the diamond brazing tool has strong fixation of diamond crystal grains, has a long life and good sharpness, and improves the precision and processing efficiency of grinding and cutting.

  The adhesive 14 is used for the purpose of temporarily fixing the diamond crystal grains 13 and the brazing filler metal (powder) 15 to the base metal 31 and decomposes and disappears when heated, and the brazing filler metal 15 melts and “wetting” causes the diamond crystals. The grains 13 are fixed to the base 31 and then cooled to work as the brazing material 15. The material of the adhesive 14 is preferably a material that has viscosity at a low temperature and decomposes at a high temperature, and can be selected in consideration of work conditions such as chemical glue, paraffin, polyethylene glycol, and mineral oil. Depending on the situation of work, for example, pure water can also be used as the adhesive 14 only when the diamond crystal grains 13 are attached to a horizontally placed plane.

In FIG. 6 c, it is possible to supply more brazing filler metal 15 when the paste brazing filler metal 15 is injected, and diamond crystal grains 13 than when the brazing filler metal powder 15 made of hard solder is distributed. The brazing material 15 is also attached to the negative angle portion in the vertical direction, and the diamond crystal grains 13 are more firmly fixed to the mounting surface 32. In addition, about the injection | pouring method and injection | pouring apparatus of the brazing material 15, it is not necessarily limited.

The brazing method using hard brazing is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. The cylindrical base metal 31 can be set in consideration of work efficiency, required quality (strength), and the like depending on the material, size, and shape of the cylindrical base metal 31.
The brazing filler metal 15 in brazing using a hard brazing is preferably a silver brazing or copper brazing containing Ti, but an Ag—Cu—Ni brazing, Cu—Mn—Ni brazing, or Ni—Cr—B—Si brazing. Wax etc. are also used.
The material of the circular base metal 31 is preferably tool steel containing Ti, but hard materials such as sintered metal and ceramics can also be applied and are not limited depending on the application. Further, as shown in FIG. 6e, the thickness of the layer of diamond crystal grains 13 constituting the cutting edge surface 31a is preferably one crystal grain.
For this reason, the diamond brazing tool has a high base metal strength and does not drop diamond crystal grains, and has a long life.

Further, as shown in FIG. 6 b, a mounting surface 32 is formed on one end surface 31 b of the base metal 31 in the direction of the central axis 38, and a cutting edge surface 31 a composed of diamond crystal grains 13 is formed. Since the traveling direction (arrow) of the rotation center axis 38 and the base metal 31 is a right angle, the diamond brazing tool 30 is used for a surface grinding wheel (vertical type), a floor grinding wheel, a stone grinding wheel, and the like. Can be used.

As shown in FIGS. 7a to 7d, other forms of the mounting surface 32 formed on the base metal are such that the cross-sectional shape of the groove is radial (FIG. 7a), non-radial (FIG. 7b), and spiral ( 7c), a knurled shape (a depression or protrusion having an inclined surface is formed on one end face of the base metal) (FIG. 7d), and the like.

As shown in FIGS. 8a and 8b, the diamond brazing tool according to another embodiment of the present invention has a mounting surface 42 to which diamond crystal grains 13 in which a plurality of crystal faces form a regular polyhedron are fixed. A substantially V-shaped groove 42a has a predetermined angle 17 with respect to the traveling direction of the cylindrical base metal 41, and continues in a radial direction in the circumferential direction of the end surface 41b in the direction of the central axis 48 of the base metal 41. It is formed.
Next, as shown in FIG. 8 c, the attachment surface 42 has a predetermined angle 17 with the direction of travel of the base metal 41 (arrow), and the brazing material 15 made of hard braze is mixed with the adhesive 14 and attached. A plurality of diamond crystal grains 13 are then applied to the surface 42 and then distributed. Further, as shown in FIG. 8 c, the adhesive 14 is decomposed and disappeared by the action of heat of brazing using the brazing material 15, the brazing material 15 is melted, and the crystal surface 13 a of the diamond crystal grain 13 is attached to the mounting surface 42. It is fixed in parallel with.
As a result, a ridge (projection) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 46.
That is, as shown in FIG. 8 d, 13 c, which is one ridge of the crystal surface 13 b located in a symmetric orientation with the crystal surface 13 a of the diamond crystal grain 13, protrudes to the closest position to the work material 46. As described above, the diamond crystal grains 13 are regularly arranged while maintaining a predetermined angle 17, and the ridges (projections) 13 c of the crystal surface 13 b are always in contact with the work material 46 and processed.
For this reason, the diamond brazing tool has strong fixation of diamond crystal grains, has a long life and good sharpness, and improves the precision and processing efficiency of grinding and cutting. It can also be applied to polishing.

  The adhesive 14 is used for the purpose of temporarily fixing the diamond crystal grains 13 and the brazing filler metal (powder) 15 to the base metal 41. The adhesive 14 is decomposed and disappears when heated, and the brazing filler metal 15 melts and “wetting” causes the diamond crystals. The grains 13 are fixed to the base metal 41 and then cooled to work as the brazing material 15. The material of the adhesive 14 is preferably a material that has viscosity at a low temperature and decomposes at a high temperature, and can be selected in consideration of work conditions such as chemical glue, paraffin, polyethylene glycol, and mineral oil. Depending on the situation of work, for example, pure water can also be used as the adhesive 14 only when the diamond crystal grains 13 are attached to a horizontally placed plane.

The brazing method using hard brazing is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. The cylindrical base metal 41 can be set in consideration of work efficiency, required quality (strength), etc., depending on the material, size, and shape of the cylindrical base metal 41.
The brazing filler metal 15 in brazing using a hard brazing is preferably a silver brazing or copper brazing containing Ti, but an Ag—Cu—Ni brazing, Cu—Mn—Ni brazing, or Ni—Cr—B—Si brazing. Wax etc. are also used.
The material of the cylindrical base metal 41 is preferably tool steel containing Ti, but hard materials such as sintered metal and ceramics can also be applied and are not limited depending on the application.
For this reason, the diamond brazing tool has a high base metal strength and does not drop diamond crystal grains, and has a long life.

Further, as shown in FIG. 8b, a mounting surface 42 is formed on one end surface 41b of the base metal 41 in the direction of the rotation center axis 48, and a cutting edge surface 41a composed of diamond crystal grains 13 is formed. Therefore, the diamond brazing tool 40 can be used for a bit or a grinding wheel.

Other forms of mounting surface 42 are shown in FIGS. 7a-7d, wherein the groove cross-section is radial (FIG. 7a), also non-radial (FIG. 7b), spiral (FIG. 7c), and knurled ( The formation of a depression or protrusion having an inclined surface on one end surface of the base metal (FIG. 7d) and the like can be similarly applied to one end surface of the base metal 41.
Further, when the width of the mounting surface 42 in the radial direction is extremely small, it can be applied to cutting (drilling) processing such as a core drill.

Still another embodiment of the diamond brazing tool of the present invention has a mounting surface 52 to which diamond crystal grains 13 in which a plurality of crystal faces form a regular polyhedron are fixed, as shown in FIGS. 9a and 9b. A substantially V-shaped groove 52 a having a predetermined angle 17 with respect to the traveling direction of the belt-like base metal 51 is formed in the thickness direction of the base metal 51, and the outside of the belt-like base metal 51. It is formed continuously in the longitudinal direction of 51b. Further, as shown in FIG. 9 e, the diamond crystal grains 13 are arranged in a plurality of rows in the thickness direction of the base metal 51.

Next, as shown in FIG. 9c, the mounting surface 52 has a predetermined angle 17 with the traveling direction (arrow) of the base metal 51, and the brazing material 15 made of hard brazing and the plurality of diamond crystal grains 13 are bonded. It is mixed with the agent 14 and uniformly applied to the mounting surface 52. Further, as shown in FIG. 9d, the adhesive 14 is decomposed and disappeared by the action of the heat of brazing using the hard solder, the brazing material 15 is melted, and the crystal surface 13a of the diamond crystal grain 13 becomes the mounting surface 52. It is fixed in parallel.
As a result, a ridge (protrusion) 13 c shared by a plurality of crystal planes of the diamond crystal grains 13 is projected at a position closest to the work material 56.
That is, as shown in FIG. 9 d, 13 c that is one ridge of the crystal surface 13 b located in a symmetric orientation with respect to the crystal surface 13 a of the diamond crystal grain 13 protrudes to the closest position to the work material 56. As described above, the diamond crystal grains 13 are regularly arranged while maintaining a predetermined angle 17, and the ridges (projections) 13 c of the crystal surface 13 b are always brought into contact with the work material 56 and processed. (Here, FIGS. 9c and 9d are shown upside down from FIGS. 9a and b for convenience of explanation.)
For this reason, the diamond brazing tool has strong fixation of diamond crystal grains, has a long life and good sharpness, and improves the precision and processing efficiency of grinding and cutting.

  The adhesive 14 is used for the purpose of temporarily fixing the diamond crystal grains 13 and the brazing filler metal (powder) 15 to the base metal 51. The adhesive 14 is decomposed and disappears when heated, and the brazing filler metal 15 melts and “wetting” causes a diamond crystal. The grains 13 are fixed to the base metal 51 and then cooled to work as the brazing material 15. The material of the adhesive 14 is preferably a material that has viscosity at a low temperature and decomposes at a high temperature, and can be selected in consideration of work conditions such as chemical glue, paraffin, polyethylene glycol, and mineral oil. Depending on the situation of work, for example, pure water can also be used as the adhesive 14 only when the diamond crystal grains 13 are attached to a horizontally placed plane.

The brazing method using hard brazing is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. Depending on the material, size, and shape of the belt-like base metal 51, the work efficiency, required quality (strength), and the like can be set.
The brazing filler metal 15 in brazing using a hard brazing is preferably a silver brazing or copper brazing containing Ti, but an Ag—Cu—Ni brazing, Cu—Mn—Ni brazing, or Ni—Cr—B—Si brazing. Wax etc. are also used.
Next, the strip-shaped base metal 51 is not limited to the form shown in FIG. 9a, and a form in which the strip-shaped base metal forms a loop shape is also possible.
The material of the band-shaped base metal 51 is preferably tool steel containing Ti, but hard materials such as sintered metal and ceramics can also be applied, and are not limited depending on the application. Further, as shown in FIG. 9e, the thickness of the layer of the diamond crystal grains 13 constituting the cutting edge surface 51a is preferably one crystal grain.

9b, a cutting edge surface 51a composed of the attachment surface 52 and the diamond crystal grains 13 is formed in the longitudinal direction of the outer side 51b of the base metal 51, and the processing direction of the base metal 51 and the base metal 51 Since the traveling direction (arrow) is a right angle, the diamond brazing tool 50 can be used for a cutting / cutting grindstone such as a band saw.
For this reason, the diamond brazing tool has a high base metal strength and does not drop diamond crystal grains, and has a long life.

  In the present invention, the crystal face of diamond crystal grains is fixed to a mounting face having a predetermined angle so that the ridges (projections) of the crystal face of the diamond are always involved in grinding / cutting, thereby achieving a long life and good sharpness. It can be used as a diamond brazing tool having high processing accuracy. It can also be applied to polishing.

FIG. 1a is a conceptual diagram of crystal faces of diamond crystal grains constituting the diamond brazing tool of the present invention. FIG. 1 b is a conceptual diagram of a crystal face of diamond crystal grains constituting the diamond brazing tool of the present invention. FIG. 1c is a conceptual diagram of a crystal face of diamond crystal grains constituting the diamond brazing tool of the present invention. FIG. 1d is a conceptual diagram showing a process in which diamond crystal grains constituting the diamond brazing tool of the present invention are fixed. FIG. 1e is a conceptual diagram showing a process in which diamond crystal grains constituting the diamond brazing tool of the present invention are fixed. FIG. 1f is a conceptual diagram showing a process in which diamond crystal grains constituting the diamond brazing tool of the present invention are fixed. FIG. 2a is a conceptual diagram of one embodiment of the diamond brazing tool of the present invention. FIG. 2b is a perspective view of one embodiment of the diamond brazing tool of the present invention. FIG. 2c is a conceptual diagram before fixation of diamond crystal grains constituting an embodiment of the diamond brazing tool of the present invention. FIG. 2d is a partial cross-sectional view of FIG. 2b (after fixing the diamond crystal grains) as viewed from the A position. 2e is a cross-sectional view taken along the line B in FIG. 2d. FIG. 3a is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 3 b is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 3c is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 3d is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 4 a is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 4b is a conceptual diagram of another modification of the diamond crystal grain mounting surface constituting one embodiment of the diamond brazing tool of the present invention. FIG. 5a is a conceptual diagram of another embodiment of the diamond brazing tool of the present invention. FIG. 5b is a perspective view of another embodiment of the diamond brazing tool of the present invention. FIG. 5c is a conceptual diagram before the fixing of diamond crystal grains constituting another embodiment of the diamond brazing tool of the present invention. FIG. 5d is a partial cross-sectional view taken along the line C in FIG. 5b (after fixing the diamond crystal grains). FIG. 5e is a conceptual diagram of a diamond crystal grain mounting surface (indentation) constituting another embodiment of the diamond brazing tool of the present invention. FIG. 5f is a conceptual diagram of a diamond crystal grain mounting surface (projection) constituting another embodiment of the diamond brazing tool of the present invention. FIG. 6a is a conceptual diagram of still another embodiment of the diamond brazing tool of the present invention. FIG. 6b is a perspective view of yet another embodiment of the diamond brazing tool of the present invention. FIG. 6c is a conceptual diagram before the fixing of diamond crystal grains constituting still another embodiment of the diamond brazing tool of the present invention. 6d is a partial cross-sectional view of FIG. 6b (after fixing the diamond crystal grains) as viewed from the D side. 6e is a cross-sectional view taken along the line E in FIG. 6d. FIG. 7a is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting still another embodiment of the diamond brazing tool of the present invention. FIG. 7 b is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting still another embodiment of the diamond brazing tool of the present invention. FIG. 7c is a conceptual diagram of a modification of the diamond crystal grain mounting surface constituting still another embodiment of the diamond brazing tool of the present invention. FIG. 7d is a conceptual diagram of a modified example of the diamond crystal grain mounting surface constituting still another embodiment of the diamond brazing tool of the present invention. FIG. 8a is a conceptual diagram of still another embodiment of the diamond brazing tool of the present invention. FIG. 8b is a perspective view of yet another embodiment of the diamond brazing tool of the present invention. FIG. 8 c is a conceptual diagram before the fixing of diamond crystal grains constituting still another embodiment of the diamond brazing tool of the present invention. FIG. 8d is a partial cross-sectional view of FIG. 8b (after fixing the diamond crystal grains) as viewed from the F side. FIG. 9a is a conceptual diagram of still another embodiment of the diamond brazing tool of the present invention. FIG. 9b is a perspective view of yet another embodiment of the diamond brazing tool of the present invention. FIG. 9c is a conceptual diagram before the diamond crystal grains constituting another embodiment of the diamond brazing tool of the present invention are fixed. FIG. 9d is a partial cross-sectional view as seen from G in FIG. 9b (after fixing the diamond crystal grains). 9e is a cross-sectional view taken along line H in FIG. 9d.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Diamond crystal 2, 3 (001) Crystal face 4 (111) Crystal face 4a {111} Crystal face 4b {1111} Crystal face 5 Brazing material 6 Base metal 7 Mounting surface 10, 20, 30, 40, 50 Diamond brazing Tool 11, 21, 31, 41, 51 Base metal 12, 22, 32, 42, 52 Mounting surface 12a, 22a, 32a, 42a, 52a Groove 13 Diamond crystal grain 13a, 13b Crystal surface
13c Edge (projection) 14 Adhesive 15 Brazing material 16, 26, 36, 46, 56 Workpiece 17 Predetermined angle 18, 28, 38, 48 Center axis of rotation

Claims (5)

Diamond crystal grains in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, and a brazing material made of a plurality of the diamond crystal grains and hard solder is distributed on the upper surface of the adhesive applied to the mounting surface, Or the adhesive is decomposed and disappeared by the action of heat of brazing using the brazing material, the brazing material is melted, and the crystal planes of the diamond crystal grains are fixed parallel to the mounting surface, A diamond brazing tool characterized in that a ridge shared by a plurality of crystal faces of diamond crystal grains is projected at a position close to a work material. The brazing material in powder form is spread on the upper surface of the adhesive, and then a plurality of diamond crystal grains are spread, and the adhesive is decomposed and disappears by the action of the heat of brazing, and the brazing material is melted. The diamond brazing tool according to claim 1, wherein a crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface. A plurality of the diamond crystal grains are distributed on the upper surface of the adhesive, and then the powdery brazing material is distributed, or the paste-like brazing material is injected, and the bonding is performed by the action of the heat of brazing. The diamond brazing tool according to claim 1, wherein the agent is decomposed and disappeared, the brazing material is melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface. Diamond crystal grains in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, a brazing material made of hard braze is mixed with an adhesive and applied to the mounting surface, and then a plurality of the diamond crystal grains are distributed. The adhesive is decomposed and disappeared by the action of heat of brazing using the brazing material, the brazing material is melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface, and the diamond crystal A diamond brazing tool, wherein a ridge shared by a plurality of crystal planes of grains is projected at a position close to a work material. Diamond crystal grains in which a plurality of crystal faces form a regular polyhedron,
A base metal having a mounting surface to which the diamond crystal grains are fixed, and
The mounting surface has a predetermined angle with the traveling direction of the diamond crystal grains, and a brazing material made of hard solder and a plurality of the diamond crystal grains are mixed with an adhesive and applied to the mounting surface, and the brazing material The adhesive is decomposed and disappears by the action of heat of brazing using the solder, the brazing material is melted, and the crystal plane of the diamond crystal grains is fixed in parallel to the mounting surface, and a plurality of crystals of the diamond crystal grains A diamond brazing tool characterized in that a ridge shared by faces is projected at a position close to a work material.

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