JPH09272060A - Grinding wheel tool and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve holdability of an abrasive grain, by applying a mixture dried of an organic sizing agent and self melting alloy powder to a surface treated grinding wheel edge mounting part, further with the organic sizing agent applied, scattering the abrasive grain dried, and heating it to a specific temperature in the non-oxidation atmosphere, thereafter cooled. SOLUTION: Blast treating is applied to a steel base material 1, a surface is cleaned, next, an organic sizing agent 3 diluting water soluble methyl cellulose with water and self melting alloy powder 2A of binding material are mixed, to be applied to the steel base material 1 by using an injection machine. These materials are dried, the organic sizing agent 3 is volatilized, also the self melting alloy powder 2A of binding material is connected to adhere to an abrasive grain 4 in a manner of substitution. Inside a heating furnace is vacuumized, for about 7 hours, heating to, for instance, 870 deg.C, the organic sizing agent 3 is volatilized to be removed, thereafter by a rise to 900 to 1150 deg.C heating temperature, by holding for 10 to 15 minutes for instance, thereafter the abrasive grain is gradually cooled to an ordinary temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone tool provided with abrasive grains such as diamond grains and cemented carbide powder for cutting, polishing, cutting, boring or excavating works made of various materials such as stones and steel pipes, and more particularly, The present invention relates to a grindstone tool having a simple manufacturing process and capable of firmly bonding a grindstone edge to a base material, and a manufacturing method thereof.

[Prior art]

Conventionally, as a general method for forming a grindstone tool utilizing diamond particles or cubic boron nitride particles in the grindstone tool, there are an electrodeposition bonding method and a metal sinter bonding method. The electrodeposition bonding method is, for example, using a steel base material as a material to be plated, masking an unplated portion with a resist for plating, and then performing nickel plating as a base, and then applying a predetermined amount of diamond particles of a surfactant. This is a method in which electroplating is performed using a nickel plating solution in which the dispersed dispersion is mixed and the eutectoid diamond particles are fixed with electrodeposited nickel.

Further, in the metal-sinter bonding method, for example, diamond particles and cobalt powder or a mixed powder of cobalt, copper and tin, etc. are mixed and the mixture is heated in a nitrogen atmosphere at 900 to 10 to 10.
The metal powder was pressed and sintered by a hot pressing method in which a pressure of 250 Kg / cm ² was applied while maintaining the temperature at 00 ° C to produce a sintered chip with diamond particles fixed, and this sintered chip Is attached to a steel substrate by brazing or laser welding.

Further, in the case of manufacturing a diamond tool, an organic sizing agent is applied to a blasted steel base material, a self-fluxing alloy powder is sprinkled on the organic sizing agent, and the organic sizing agent is dried. After applying the organic paste again, after spraying the diamond particles, the organic paste is dried, then,
A manufacturing method has also been proposed in which heating is performed at a temperature of 950 to 1150 ° C. in a non-oxidizing atmosphere, the diamond particles are fixed to the steel base material by fusion bonding of the self-fluxing alloy, and gradually cooled.

[0005]

However, most diamonds except some natural diamonds are insulative, and in the former electrodeposition bonding method, as shown in FIG. The electrodeposited metal 7 is held on the steel base material 6, and the electrodeposited metal 7 swells between the diamond particles 5, but the adherence of the electrodeposited metal 7 to the diamond particles 5 is poor and the so-called wettability is high. The diamond particles 5
Becomes substantially dependent on the holding force of the electrodeposited metal 7.

[0006] Therefore, although the sharpness at the time of use is good according to the exposed condition of the cutting edge of the diamond particles, the holding power of the diamond particles is weak, and especially during the work such as grinding, the electrodeposited metal such as nickel due to the heat generated is generated. If there is thermal expansion, the diamond particles are loosened in fixing and the diamond particles are likely to fall off, so wet grinding using cooling water is required, and it may still be difficult to handle depending on the material to be ground. . There is also a problem that the tool life is short.

In the sinter-bonding method by hot pressing, the diamond particles can be held in multiple layers in the sinter-bonded metal, but the wettability between the sintered metal and the diamond particles is poor, and As in the case of the above-mentioned electrodeposition bonding method shown by 4, the holding of the diamond particles depends on the holding force due to the shrinkage and the internal strain of the surrounding sintered metal, so that the holding force is weak and There is a problem that grinding is required, the utilization efficiency of diamond particles is poor, and further, it cannot be directly formed on a substrate, and there is a problem in productivity.

The cubic boron nitride particles as abrasive grains also have a very high melting point, but are electrically insulating and have poor adhesion of electrodeposited metal, have a low coefficient of thermal expansion, and have a high melting point with molten metal. Since it had poor wettability, it had the same problem as in the case of the above diamond particles.

Further, in the method for manufacturing a diamond tool, since the number of steps is large, it has been desired to further shorten the manufacturing steps.

The present invention was devised in view of the above problems, has a simple manufacturing process, has good retention of abrasive grains such as diamond grains, and further provides cooling water regardless of the type of material to be ground. An object of the present invention is to provide a whetstone tool having a whetstone edge capable of performing dry grinding which is not necessary, and a manufacturing method thereof.

[0011]

In order to achieve the above object, the present invention provides a method of manufacturing a grindstone tool in which a tip of a blade holding member is provided with a grindstone tip for cutting and polishing, and the surface is chemically or physically The treated whetstone blade mounting portion is coated with a mixture of an organic sizing agent and a self-fluxing alloy powder as a binder, and then dried, further coated with an organic sizing agent, sprayed with abrasive grains, and then dried. , In a non-oxidizing atmosphere 9
It was constituted as a method of manufacturing a grindstone tool which is heated to a heating temperature of 0 to 1150 ° C., the abrasive grains are fixed to the grindstone blade attachment portion by fusion of the self-fluxing alloy, and gradually cooled from the heating temperature.

Further, in a method of manufacturing a grindstone tool having a grindstone blade tip for cutting and polishing at the tip of a blade holding member, an organic sizing agent is applied to the grindstone blade mounting portion which is chemically or physically surface-treated. After that, the abrasive grains are sprinkled, then the self-fluxing alloy powder is sprinkled as a binder, dried, and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere to melt the self-fluxing alloy. The abrasive grains were fixed to the whetstone blade attachment portion by wearing, and the grinding stone tool was manufactured by gradually cooling from the heating temperature.

Further, in the method of manufacturing a grindstone tool having a grindstone blade tip for cutting and polishing at the tip of the blade holding member, the grindstone blade mounting portion chemically or physically surface-treated,
A self-fluxing alloy powder is mixed and applied as an organic sizing agent and a binder, and after spraying abrasive grains, it is dried and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere, and The abrasive grains are fixed to the grindstone blade attachment portion by fusion welding of a molten alloy, and the abrasive grain tool is constructed by gradually cooling from the heating temperature.

Further, in the method of manufacturing a grindstone tool having a grindstone cutting edge for cutting and polishing at the tip of the blade holding member, an organic sizing agent and a bonding agent are attached to the grindstone blade mounting portion which has been chemically or physically surface-treated. After mixing and applying self-fluxing alloy powder and abrasive grains as a material, it is dried and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere, and the self-fluxing alloy is fusion-bonded to the grindstone. The above-mentioned abrasive grains were fixed to the blade attachment portion, and a grinding stone tool was manufactured by gradually cooling from the heating temperature.

Further, the binder is 50% by weight.
% Of the transition metal and the balance is a self-fluxing alloy powder, and the binder is 5% by weight.
The method for producing the above-mentioned grindstone tool may use a powder of a mixture containing an alloy of a transition metal of less than 0% and the remainder being a self-fluxing alloy.

Further, the non-oxidizing atmosphere is 1 × 10 ^-4.
A vacuum of ~ 5 x 10 ^-4 Torr is convenient. It is convenient that the non-oxidizing atmosphere is an argon gas atmosphere or a hydrogen gas atmosphere.

Further, for a cutter having a grindstone blade edge or / blade holding member surface obtained by the above-mentioned method for manufacturing a grindstone tool, and for polishing, grinding, cutting, excavating, piercing, etc. of a core bit, a blade, a cup wheel, a diamond wire saw, etc. Configured as the whetstone tool used.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are block diagrams showing the manufacturing process of the grindstone tool, and FIGS. 2 (a) and 2 (b) are
Block diagram showing the manufacturing process of the grindstone tool, FIG.
(B) is a grindstone tool using diamond particles,
It is a partial schematic diagram which shows the holding condition of a diamond particle.

As shown in FIG. 1A, a steel base material is chemically or physically surface-treated, and a mixture of an organic sizing agent and a self-fluxing alloy is applied to the surface-treated steel base material. ,
After drying, the organic paste is applied again, and further abrasive grains such as diamond particles are sprayed, dried, heated, and cooled to manufacture a grindstone tool. This process will be described in more detail below.

First, 10 made of mild steel as a steel base material.
Using a base material for a cutter having a diameter of cm, the steel base material is subjected to a blast treatment as a surface treatment step of spraying 24 mesh alumina abrasive grains at a pressure of 6 kg / cm ² for 5 minutes,
Clean the surface. Next, an organic sizing agent prepared by diluting commercially available water-soluble methyl cellulose with about 3.3 times the amount of water on the steel base material and a self-fluxing alloy powder of the binder, in a weight percentage of 16%
% Chromium, 4.0% molybdenum, 2.4% tungsten, and 0.5% carbon mixed with a pre-alloyed commercial atomized powder of nickel-based self-fluxing alloy with the balance nickel. Apply to the steel substrate using an injection machine such as a dispenser.

At this time, the surface of the steel base material is cleaned and activated by performing the blast treatment as the surface treatment treatment, and the anchor effect improves the adhesion of the organic sizing agent and the binder. The water-soluble organic sizing agent adheres and holds the abrasive grains, and is dried by heating at about 500 ° C. or more to volatilize the organic sizing agent and replace and bond the bonding material to the abrasive grains. As an organic sizing agent, cellulose ether such as methyl cellulose, hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose exhibits high viscosity and high elasticity depending on its dilution concentration, and has good workability and good retention of abrasive grains. Then, the organic paste is applied again.

Next, 1 carat (0.2 g) of diamond particles of 40 to 50 mesh was sprayed as abrasive grains, and the protruding state was adjusted by pressurizing, and at 10 ° C. for 10 minutes and 1 minute.
Drying was performed at 50 ° C. for 20 minutes to remove the organic sizing agent. It should be noted that performing the drying in two steps has the meaning of avoiding rapid boiling of water in the organic sizing agent. The state of holding the diamond particles at this time is shown in FIG. That is, the self-fluxing alloy powder 2A is laid on the steel base material 1 that has been subjected to the blast treatment, and the diamond particles 4 are placed on the self-fluxing alloy powder 2A via the organic sizing agent 3.
Is being held.

Next, the degree of vacuum in the heat treatment furnace is set to 3 × 10.
^The pressure was set to ^-4 Torr and the temperature was raised to 870 ° C in about 7 hours to sufficiently volatilize and remove the organic sizing agent. Then, this 87
Hold at 0 ° C for 1 hour to stabilize the composition of the self-fluxing alloy, then 900 ° C to 1150 ° C for about 15 minutes.
Heating temperature in the range of C (here, performed at 1100 ° C)
The temperature was raised to 10 minutes. Then, the sample is gradually cooled (gradually cooled) to room temperature in a non-oxidizing atmosphere such as a vacuum in a heat treatment furnace to obtain a cutter sample in which diamond particles are held in a single layer as shown in FIG. 3 (b). It was That is, the self-fluxing alloy 2B is fused to the steel substrate 1, and the diamond particles 4 are chemically fused to the diamond particles 4 in a swelling state with good wettability.

Oxygen is harmful during fusion heating of a binder such as a self-fluxing alloy, and the presence of a slight amount of oxygen oxidizes the surface of the abrasive grains. In the case of diamond particles, graphitization is further promoted. Fusion is hindered. In order to prevent this, it is also effective to introduce argon gas or hydrogen gas to create a non-oxidizing atmosphere. In this case, however, a vacuum suction step is intervened particularly in the introduction of substitution to prevent oxygen from remaining as much as possible. As a result, the effect after fusion heating is further improved. When a vacuum atmosphere is adopted as the non-oxidizing atmosphere, a high vacuum degree of 1 × 10 ^{−4 to} 5 × 10 ⁻⁴ Torr is preferable, and when the vacuum degree falls below this range,
Oxidation protection of the abrasive grains is insufficient, and the effect is not so different even if the degree of vacuum is higher than this range.

The heating temperature at which the binder is fused is 90
If the temperature is lower than 0 ° C, the fusion between the binder such as self-fluxing alloy powder and the abrasive grains is insufficient and the holding power of the abrasive grains is poor. Grain retention becomes poor and embrittlement due to oxidation of the abrasive grains begins. In the case of diamond particles, further, when the steel base material contains iron, the iron and the carbon of the diamond particles react with each other, and brittle cementite is likely to be generated, which may make it unusable as a diamond tool.

Further, the grindstone tool which has finished the fusion heating is
If rapidly cooled in the cooling process, distortion may occur in the steel base material and it may shake when used as a product, so cool gradually from the heating temperature, preferably in a non-oxidizing atmosphere such as the vacuum of a heat treatment furnace. The inside of the furnace is gradually cooled from the heating temperature as it is (cooling).

The self-fluxing alloy is obtained by adding boron and silicon to a nickel base (hereinafter referred to as self-fluxing alloy A), or is obtained by adding boron and silicon to a nickel-chromium base (hereinafter referred to as self-fluxing alloy B). ), Or a general term for wear-resistant thermal spraying alloys mainly composed of a cobalt-based material containing boron and silicon (hereinafter referred to as self-fluxing alloy C), and various commercially available ones can be used.

For example, the self-fluxing alloy A to which iron and carbon have been added, the self-fluxing alloy B to which iron and tungsten have been added, the self-fluxing alloy B to which iron and molybdenum have been added, A material obtained by adding iron and carbon to the self-fluxing alloy B (hereinafter referred to as self-fluxing alloy D) may be used. In addition, the self-fluxing alloy D added with tungsten, the self-fluxing alloy C added with copper, the self-fluxing alloy C added with copper and tungsten,
Phosphorus (P), aluminum (Al), sulfur (S), titanium (Ti), zirconium (Zr) (hereinafter referred to as additives) added in a range of 1.0 wt% or less, and self-fluxing alloy C In addition to copper, molybdenum, and tungsten, the above additives are added, and the self-fluxing alloy D to which tungsten carbide is added and the above additives are added can be used.

Further, chromium and tungsten are added to the self-fluxing alloy C, tungsten and nickel are added to the self-fluxing alloy C, and chromium, nickel and molybdenum are added to the self-fluxing alloy C. Anything is fine. Further, the self-fluxing alloy C to which chromium, tungsten, carbon and other substances are added, the self-fluxing alloy C to which chromium, tungsten, carbon, nickel and iron are added, and the self-fluxing alloy C to It is possible to add chromium, carbon, nickel, iron and molybdenum.

The weight% of the nickel-based self-fluxing alloy
Is chromium 5 to 29%, boron 1.0 to 4.0%, silicon 2.0 to 5.0%, iron 1.0 to 5.0%, carbon 0.05.
~ 1.0%, titanium 5% or less, phosphorus 12% or less, copper 1.
It is convenient to use in the range of 0-4.0%, molybdenum 1.0-3.0%, tungsten 2.0-39%, and tungsten carbide 50% or less.

In addition, the weight% of the cobalt-based self-fluxing alloy
Are chromium 30% or less, boron 4.0% or less, silicon 8.
0% or less, tungsten 15.0% or less, carbon 2.5%
Hereinafter, it is convenient to use nickel in an amount of 50% or less, iron 2.5% or less, and molybdenum 7.0% or less. The self-fluxing alloys listed here are only examples, and it is needless to say that known ones can be used.

Further, the same function as the self-fluxing alloy is obtained, for example,
Titanium Rho (silver-copper-titanium, silver-copper-indium-
Titanium, copper-titanium-zirconium-nickel, copper-titanium-zirconium, silver 60 to 70%, copper 20
~ 50%, Indium 14%, Titanium 2-40%, Zirconium 20-25%, Nickel 20%, each weight%), Nickel Rho (phosphorus-nickel, chromium-phosphorus-nickel, phosphorus 10-11%, chromium) 13-25
%, Balance nickel, each weight%) may be used.

In this embodiment, when a nickel-based self-fluxing alloy is used, preferably, by weight, 10 to 20% of chromium, 2 to 5% of silicon, and 2 to 5% of boron are used.
Copper is 2-4%, molybdenum is 2-4%, tungsten is 2-4%, carbon is 0.3-1.0% and iron is 5% or less, and the balance is nickel based self-fluxing alloy. I used one.

When a cobalt-based self-fluxing alloy is used, preferably, by weight, chromium is 10 to 20%, silicon is 2 to 5%, boron is 2 to 5%, and copper is 2 to 4%. , Molybdenum 2-4%, tungsten 2-4%, carbon 0.3-1.0%, iron 5% or less and nickel 10%.
Used was a cobalt-based self-fluxing alloy containing -20% and the balance being cobalt.

The reason for this is that chromium in the self-fluxing alloy improves hardness and wear resistance by combination with nickel and / or cobalt. It is significant for increasing reactivity and improving wettability. If chromium is less than 5%, these effects cannot be expected so much, and if it exceeds 29%, improvement of these effects cannot be expected. Silicon and boron are those whose oxides produced by heating act as a flux, lower the melting point of the fused metal, increase the fluidity, and improve the wettability and fusion property to the abrasive grains. If it is 2% or less, the effect is small, and if it is 5% or more, the effect cannot be expected to be improved.

Copper in this self-fluxing alloy has the effect of lowering the melting point of the molten alloy and improving the wettability of the abrasive grains, and molybdenum is dispersed as an aggregate during the fusion heating to form a liquid phase. Prevents excessive flow of molten alloy and prevents movement of abrasive grains. Further, molybdenum in this self-fluxing alloy exhibits a lubricating action when this grindstone tool product is used, and exhibits an effect as an active filler. If the content of each of copper and molybdenum is less than 2%, the effect cannot be expected. Even if the content of each of copper and molybdenum is more than 5%, the effect cannot be expected to be improved as much as the addition thereof.

Tungsten in this self-fluxing alloy exhibits effective improvement in wear resistance within the above-mentioned range of components, and iron and carbon often enter as impurities, but this carbon forms a compound with chromium. It also has the function of finely dispersing in the casting alloy to improve the strength. Cobalt also has an effect of improving not only the wear resistance of the alloy but also the heat resistance within the above-mentioned range of components, and is advantageous for a difficult-to-grind material having a relatively high heat generation.

Then, by using a powder of a mixture of the self-fluxing alloy and less than 50% by weight of a transition metal or an alloy of transition metals as a binder, the binder is further bonded without substantially impairing its performance. The melting point of the material can be lowered, and the internal stress due to the self-fluxing alloy can be relaxed, and in the grindstone manufacturing process, the abrasive grains due to the diamond particles or the cubic boron nitride particles can be fixed and held without being damaged. The transition metal is a solid metal having a high melting point such as titanium, manganese, iron, zirconium, molybdenum and having atomic numbers 21 to 30 and 39 to 48. Also, atomic number 7
Atomic numbers 57 to 78 including 4 tungsten may be used as the transition metal. Further, an alloy of the above transition metal may be used.

Further, although diamond particles are generally used as the abrasive grains, superabrasive grains, that is, diamond particles, cubic boron nitride particles, alumina, alundum, silicon carbide or superhard powder, etc. May be used alone or in combination of plural or all.

Next, as shown in FIG. 1B, a second embodiment as a manufacturing method will be described. First,
The surface of the steel base material is chemically or physically treated (blasting is performed here) to clean the surface of the steel base material, and then an organic sizing agent is applied. Then, abrasive grains such as diamond particles are dispersed, and then a self-fluxing alloy is also dispersed. Further, a drying operation is performed, heating is performed at a heating temperature, and cooling is gradually performed from the heating temperature to manufacture a grindstone tool. In the above process, the order of spraying the abrasive grains and the self-fluxing alloy may be changed. In this manufacturing process, the process can be shortened by one step compared to the manufacturing process described with reference to FIG.

Next, as shown in FIG. 2A, a third embodiment as a manufacturing method will be described. FIG. 2 (a)
As shown in, the surface of the steel base material is subjected to a blasting treatment, and a mixture of an organic sizing agent and a self-fluxing alloy is applied by an injection machine such as a dispenser, and abrasive grains are sprayed. After that, a drying operation is performed, and the self-fluxing alloy is fused by heating to a heating temperature and gradually cooled to manufacture a grindstone tool. In this manufacturing process, the work of one process can be further shortened as compared with the manufacturing process shown in FIG.

Further, as shown in FIG. 2B, a third embodiment as a manufacturing method will be described. FIG.
As shown in (b), first, the surface of the steel substrate is blasted, and a mixture of an organic sizing agent, a self-fluxing alloy and abrasive grains is applied. After that, a drying operation is performed, and the self-fluxing alloy is fused by heating at a heating temperature and gradually cooled to manufacture a grindstone tool. In this manufacturing process, it is possible to further shorten the manufacturing process by one step as compared with the manufacturing process shown in FIG.

The above-mentioned FIG. 1 (b) and FIG. 2 (a)
Each surface processing treatment, application of an organic sizing agent, fusion of a self-fluxing alloy, drying, heating, and slow cooling in the manufacturing process shown in (b) are the same as those described in FIG. 1 (a). Therefore, only an outline is given.

[0044]

EXAMPLE Next, the cutter sample obtained as described above was attached to a grinding tool (sander) and subjected to a grinding test. That is, this grinding tool is attached to a test device, and a grinding tool with a 5 kg weight slides along a guide that descends obliquely so that the cutter part is naturally loaded and applied to the material to be ground. The materials to be ground were stones made of concrete and red granite, and 35 cuts were ground in a dry state without using cooling water, and the grinding speed was investigated. Further, the same method was used to investigate the cuttability of 35-cut crystallized glass. The stone material and the crystallized glass are each 2 cm thick and 300 cm long.

Cutter samples of the same size were manufactured by the conventional electrodeposition bonding method and metal bonding method described above, and Comparative Example 1
Table 1 shows the results of the grinding test performed as the comparative example 2 and the cutter sample of the example manufactured by the above-described manufacturing method.

[0046]

[Table 1]

As can be seen from Table 1 above, according to the cutter sample of the present invention, it is about 1.5 times as large as that by the conventional electrodeposition bonding method on the concrete or stone material and by the metal sinter bonding method. It showed a sharpness that can be ground at a grinding speed about twice as high as that of the glass of the present invention, and showed that the crystallized glass also had a cutting ability of 4 to 7 times as high as that of the glass of Comparative Examples 1 and 2.

Next, a diamond bit sample having an inner diameter of 20 mm was prepared. The procedure was the same as for the cutter sample, except that diamond particles of 40 to 50 mesh were applied in a total amount of 1.5 carats. The produced diamond bit sample was attached to an electric drill tool with a weight of 25 kg, and a drilling test by grinding was performed in a free fall state and in a dry type without using cooling water.

Further, diamond bit samples having the same substrate size as the diamond bit samples according to the above-mentioned Examples were manufactured by the above-mentioned electrodeposition bonding method and sintered metal bonding method, and Comparative Example 3 and Comparative Example respectively. The results of the same test as No. 4 are shown in Table 2.

[0050]

[Table 2]

As described above, in the diamond bit sample of the present invention, there is no abnormality even if 12 holes are drilled in the reinforced concrete material, which is more than that by the conventional electrodeposition bonding method and metal sinter bonding method. It was shown that the drilling ability was at least several times higher, and even if the stone material was drilled with 20 holes, there was no abnormality and almost the same drilling ability could be expected.

As the steel base material in the grindstone tool of the present invention, rolled steel for general structure (SS490 etc.), carbon steel for machine structure (S45C etc.), tough steel (SCM etc.), carbon tool steel (SK steel). Etc.), a steel base material made of alloy tool steel (SKS, etc.) or stainless steel (SUS), and a cemented carbide base material containing tungsten as a main component can be selectively used according to the application.

The diamond tool obtained by the manufacturing method of the present invention has a wide range of applications, and is not limited to the cutters and bits of the above-mentioned embodiments, but is applicable to blades having a diameter of 9 inches or more, cup wheels, core bits, diamond wire saws, etc. It can also be applied to concrete objects such as concrete, reinforced concrete, bricks, stones, crystallized glass, building material blocks, porcelain tiles, roof tiles, hard carbon,
It is possible to grind by dry method without using cooling water, regardless of the object such as FRP and metal.

[0054]

The present invention has the following advantages because it is configured as described above. (1) The manufacturing process is simple, and the self-fluxing alloy has good wettability between the steel base material and the diamond particles through the organic paste,
In addition, since the fusion bonding is performed, the diamond particle holding force of the steel base material is strong and the durability of the tool is improved.

(2) A relatively small self-fluxing alloy powder which has a simple manufacturing process and a strong holding force for diamond particles.
Since the protrusion amount of the diamond particles can be increased, it is possible to manufacture a product with good sharpness.

(3) Since the manufacturing process is simple and the sharpness of the diamond particles is good, less heat is generated, and the heat resistance of the constituent materials such as self-fluxing alloy is good, which makes it suitable for any material to be ground. In addition, dry grinding can be performed without using cooling water.

(4) The production process is simple, and the protrusion amount of diamond particles can be controlled by adjusting the viscosity of the organic sizing agent, adjusting the particle size and supply amount of the self-fluxing alloy powder, and adjusting the pressure applied during diamond particle application. Adjustment is easily possible.

(5) Since the manufacturing process is simple and the dispersion of the diamond particles during the manufacturing can be arbitrarily performed, the distribution density of the diamond particles can be arbitrarily adjusted. (6) Since diamond particles and self-fluxing alloy can be temporarily fixed with an organic sizing agent during manufacturing, masking is not required unlike the conventional electrodeposition bonding method. Further, since the diamond particles can be directly placed on the steel base material, a complicated process such as welding of sintered chips unlike the metal sinter bonding method is not required. Therefore, productivity is good because the process is simple.

(7) Since the manufacturing process is simple and the productivity is good, mass production is possible and the product can be provided at a low cost. (8) Since the manufacturing process is simple and the combination of diamond particles and self-fluxing alloy powder via an organic paste can be multilayered, the diamond particles can be arranged in either a single layer or multiple layers.

(9) Since the manufacturing process is simple, the holding power of diamond particles is good, and the sharpness is good, dry grinding is possible regardless of the kind of the object to be ground, and it can be used in a wide range of applications.

[Brief description of drawings]

1A and 1B are block diagrams showing a method for manufacturing a grindstone tool of the present invention.

2 (a) and 2 (b) are block diagrams showing a method for manufacturing a grindstone tool of the present invention.

FIG. 3 shows a grindstone tool manufactured by the method of the present invention,
It is a partial schematic diagram which shows the holding | maintenance state of an abrasive grain, (a) shows the state before a heating process, (b) is a schematic diagram which shows the state after a heating process.

FIG. 4 is a partial schematic view showing a state of holding diamond particles in a grindstone tool using diamond particles by a conventional electrodeposition bonding method.

[Explanation of symbols]

 1 Steel substrate 2A Self-fluxing alloy powder 2B Self-fluxing alloy 3 Organic paste 4 Diamond particle (abrasive grain)

Claims (10)

[Claims] 1. A method for manufacturing a grindstone tool having a grindstone edge for cutting and polishing at the tip of a blade holding member, wherein an organic sizing agent is bonded to the grindstone blade mounting portion that has been chemically or physically surface-treated. As a material, a mixture of self-fluxing alloy powder is applied, then dried, then an organic sizing agent is applied, abrasive particles are sprayed, dried, and then heated to a heating temperature of 900 to 1150 ° C in a non-oxidizing atmosphere. Then, by fixing the abrasive grains to the grindstone blade attachment portion by fusion of the self-fluxing alloy,
A method for manufacturing a grindstone tool, which comprises gradually cooling from the heating temperature. 2. A method for manufacturing a grindstone tool having a grindstone tip for cutting and polishing at the tip of a blade holding member, wherein an organic sizing agent is applied to the grindstone blade mounting portion that has been chemically or physically surface-treated. After that, sprinkle abrasive grains, then,
The self-fluxing alloy powder is sprayed as a binder, dried, and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere, and the self-fluxing alloy is melt-bonded to the grindstone blade attachment portion to the grind. A method for manufacturing a grindstone tool, which comprises fixing grains and gradually cooling from the heating temperature. 3. A method of manufacturing a grindstone tool having a grindstone tip for cutting and polishing at the tip of a blade holding member, wherein an organic sizing agent and a bond are attached to the grindstone blade mounting portion that has been chemically or physically surface-treated. A mixture of self-fluxing alloy powder as a material is applied, abrasive grains are sprayed, then dried, and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere to fuse the self-fluxing alloy. The abrasive grain is fixed to the grindstone blade mounting portion by the method and gradually cooled from the heating temperature. 4. A method of manufacturing a grindstone tool having a grindstone tip for cutting and polishing at the tip of a blade holding member, wherein an organic sizing agent and a bonding agent are attached to the grindstone blade mounting portion that has been chemically or physically surface-treated. After applying a mixture of self-fluxing alloy powder as a material and abrasive grains, the mixture is dried, and then heated to a heating temperature of 900 to 1150 ° C. in a non-oxidizing atmosphere, and the fusion of the self-fluxing alloy described above is performed. A method for manufacturing a grindstone tool, characterized in that the abrasive grains are fixed to a grindstone blade mounting portion and gradually cooled from the heating temperature. 5. The powder of a mixture containing less than 50% by weight of a transition metal and the balance being a self-fluxing alloy is used as the binder. A method for manufacturing the described grindstone tool. 6. A powder of a mixture containing an alloy of a transition metal in an amount of less than 50% by weight, the balance being a self-fluxing alloy, is used as the binder. 4. The method for manufacturing a grindstone tool according to item 4. 7. The non-oxidizing atmosphere is 1 × 10 ^{−4 to} 5 × 1.
A vacuum of 0 ^-4 Torr.
The manufacturing method of the grindstone tool according to 2, 3, 4, 5 or 6. 8. The non-oxidizing atmosphere is an argon gas atmosphere, 1, 2, 3, 4, 5, 6.
Or the manufacturing method of the grindstone tool according to 7. 9. The method for manufacturing a grindstone tool according to claim 1, wherein the non-oxidizing atmosphere is a hydrogen gas atmosphere. 10. A grindstone tool obtained by the method for manufacturing a grindstone tool according to any one of claims 1 to 9.