JPH0623671A - Manufacture of grinding wheel - Google Patents

Abstract

PURPOSE:To provide a grinding wheel which is prevented from mixture of an organism toxic substance during machining in a medical and a dental field and prevents generation of uncomfortable noise even owing to high speed rotation. CONSTITUTION:A support ring 1 is inserted in liquid 7 wherein diamond, CBN, ZrO2, and other like grinding grains are mixed and suspended in silicate, alparaguine acid, and other like metallic salt solution. Electrolytic discharge is effected through electrification from a power supply 9, deposition is effected through chemical reaction, a grinding grain layer 2 is deposited and fixed along the periphery of the support ring 1, and the ring 1 to which grinding grains are securely fixed is fixed on the outer periphery of a rotary base sheet 3. A composite material consisting of a resin, carbon, a pattern paper, ceramics, or a metal is used in the rotary base sheet 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rotary grindstone.

[0002]

2. Description of the Related Art Conventionally, there is a rotary grindstone that also sinters a grinding stone, in which abrasive grains are hardened, is fixed to the outer circumference of a rotating disk, is fixed by adhesion, etc. Especially when this rotary grindstone is used in the fields of medicine and dentistry, it is necessary to avoid contamination of the processed bones and teeth with substances that are harmful to the living body. The loss of material is not preferred. However, since the conventional rotary grindstone is not manufactured from such a point of view, foreign matter that often causes a biophobic reaction may be mixed into the bone in the living body, the implant to be implanted in the living body, or the like during processing.

[0003]

DISCLOSURE OF THE INVENTION The present invention is directed to the manufacture of a grindstone for improving such a point, and
The object is to obtain a stable machining tool that does not generate unpleasant noise such as ultrasonic waves during machining.

[0004]

[Means for Solving the Problems] Diamond, CBN, ZrO ₂ and other abrasive grains are mixed and suspended in a solution of silicate, phosphate, aspartic acid and other metal salts around a supporting ring. It is characterized in that an electric field discharge is performed to deposit and fix, and an annular ring to which the abrasive grains are fixed is attached and fixed to the outer periphery of the rotating substrate.

[0005]

According to the present invention, as described above, abrasive grains such as diamond are mixed in a solution of silicate, phosphate or the like, and an electric field discharge is performed in a suspended state to deposit and fix them around the supporting ring. Therefore, the fixing of the abrasive grains is easily assimilated and absorbed in the living tissue, Si, C
It can be fixed with electrolytic deposits such as a and hydroxyapatite. Therefore, according to the rotary grindstone in which the support ring for fixing the abrasive grains is fixedly mounted on the rotary substrate, it is possible to avoid mixing of foreign matters during bone processing, etc., and it is possible to easily obtain a very safe rotary tool. In addition, by using a composite material of resin and carbon, glass, ceramics, or metal for the rotating substrate, this is lightweight and has high strength, has vibration damping properties, and is extremely quiet and stable in cutting and polishing. Can be processed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 is a side sectional view of a rotary grindstone, and 1 is a rotary ring for fixing abrasive grains. A TiAlV material or the like is used, and a fixed layer 2 of abrasive grains is formed on the outer circumference of the ring. Reference numeral 3 denotes a rotating substrate, which has a circumferential recessed portion 3a formed on the outer circumference thereof, which is closely fitted to the convex portion 1a formed on the inner circumference of the annular ring 1, so that the annular ring 1 is fixedly supported by the rotating substrate 3. FIG. 2 shows an embodiment in which a convex portion 5b is formed on the rotary substrate 5 and a concave portion 4b which fits in the circular ring 4 is formed so as to fit closely. FIG. 3 shows an embodiment of an electrolytic apparatus in which the abrasive grain layer 2 is deposited and fixed on the outer circumference of the circular ring 1. In the figure, 6 is a processing container in which the processing mixture 7 is stored. 1 is a ring inserted in the liquid, 8 is a current-carrying electrode immersed in the bottom of the container 6 for supplying current to the treatment mixture, 9 is a current-carrying power source for powering between the ring 1 and the electrode 8, a normal pulse Is used, and this is DC,
AC and high frequency power sources are used.

The mixed liquid 7 is prepared by mixing and suspending abrasive grains such as diamond, CBN and ZrO _{2 in} a solution of phosphate, silicate, aspartic acid and the like. For example, calcium phosphate 20
% And citric acid 5% supersaturated aqueous solution with additional phosphoric acid,
Abrasive grains such as diamond are mixed and suspended. Ring 1 in this mixture
When the ring 1 is used as a cathode and power is supplied from the power source 9 with the ring inserted, a large amount of gas 10, such as oxygen, hydrogen, and water vapor, is generated and adheres to the surface of the ring 1 of the cathode. When the surface of the ring is covered with the attached gas, it is equivalent to the resistance being inserted in series in the energizing circuit, and the resistance value increases in proportion to the generated gas. When the electrolytic current is further increased to exceed the limit charge, discharge starts to occur, Joule heat is generated, and heating starts. In this way, the temperature of the liquid around the annular ring 1 gradually rises, the discharge increases more and more due to steam and electrolytic gas, and the heating temperature rises, so that the liquid can be easily heated to about 1000 ° C. Hydroxyapatite Ca ₁₀ (P ₁₀
O _{4) 6} (OH) ₂ precipitation layer 2 is formed. The deposited layer 2 is further heat-treated by baking or the like due to the temperature rise of the annular ring 1 to strongly adhere to it to form a strong layer with high adhesiveness, and to strongly hold the abrasive grains to be used as a cutting edge.

The apatite thus produced has a 700
Although it acts as a grinding blade by virtue of vitrification due to heat treatment at about ℃, it has a high biocompatibility while it has a high biocompatibility. It is possible to provide extremely safe processing such as grinding and cutting without the inclusion of harmful foreign matter in the bones of the processed body. In addition,
The substance that is deposited by electric field discharge and fixes the abrasive grains may be silicon, calcium, or a mixture containing silicon, which has biocompatibility and provides a safe grinding tool as well as apatite. Further, the rotating substrate 3 to which the circular ring having the abrasive grains fixed as described above is mounted is made of a composite material of resin and carbon, glass, ceramics, metal or the like.
Reinforced plastics include fiber reinforced plastics and dispersion reinforced plastics. Carbon fiber, glass fiber, boron fiber, alumina fiber, ceramic fiber, metal fiber, etc. are reinforced by compounding with resin, and dispersion strengthening is carbon, glass, boron. These particles are reinforced by dispersing and compounding particles in resin, and by using these composite materials for the rotating substrate, they are light and have high mechanical strength and high vibration isolation characteristics. There is no unpleasant sound, and quiet and stable processing can be performed. The grindstone is rotated at a high speed of 100 m to 250 m / s or more by means of a turbine or the like, but it is possible to perform extremely stable processing due to its vibration-proof characteristics.

[0009]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, diamond, CB
In order to fix abrasive grains such as N and ZrO ₂ around the supporting ring, electrolytic discharge is performed in a state where the abrasive grains are mixed and suspended in a solution such as silicate, phosphate, and aspartic acid. Since the abrasive particles are deposited and fixed on the ring, the abrasive particles can be firmly fixed by electrolytic deposits such as Si, Ca, and hydroxyapatite, which are easily assimilated and absorbed in the biological tissue. Therefore, according to the rotating grindstone in which the supporting ring for fixing the abrasive grains is fixed to the rotating substrate, the bone or implant,
It is possible to avoid mixing of foreign matter during processing of artificial teeth and the like, and it is possible to easily obtain an extremely safe rotating tool. Also, by using a composite material of resin and carbon, glass, ceramics, or metal for the rotating substrate, it is lightweight, has high strength, has vibration damping properties, and is extremely quiet and stable such as cutting and polishing. It can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a side sectional view of another embodiment of the present invention.

FIG. 3 is a process explanatory view of the manufacturing method of the present invention.

[Explanation of symbols]

 1 Supporting Ring 2 Abrasive Grain Fixing Layer 3 Rotating Substrate 6 Processing Container 7 Mixed Liquid 8 Electrode 9 Current-carrying Electrode 10 Electrolytic Gas

Claims (2)

[Claims] 1. A diamond, CBN, Zr around a supporting ring.
O ₂ and other abrasive grains are mixed and suspended in a solution of silicate, phosphate, aspartic acid, and other metal salts, electrolytically discharged to deposit and fix, and the ring on which the abrasive grains are fixed is rotated. A method for manufacturing a grindstone, characterized in that the grindstone is mounted and fixed to the outer periphery of a substrate. 2. A method of manufacturing a grindstone, wherein a composite material of resin and carbon, glass, ceramics, or metal is used for the rotary base material according to claim 1.