JPS6176273A - Grinding wheel - Google Patents

Abstract

PURPOSE:To make grinding capacity in a grinding wheel maintainable for hours, by forming abrasive grains dispersedly over the surface of a grinding wheel block metal, and covering it with a hard film in addition. CONSTITUTION:Abrasive grains (for example, CBN abrasive grains) are formed on an outer circumferential surface of a grinding wheel block metal 1 simultaneously with Ni by means of the conventional electrodeposition process or chemical plating one. Next, with an ion plating process, a hard film (for example, TiN) 5 is covered in thickness at about 3mum, and a CBN composite grinding wheel is manufactured.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides various grinding wheels coated with cubic boron nitride (CBN') or diamond particles dispersed therein by methods such as electrodeposition and chemical plating. This invention relates to a high-performance grinding wheel in which the surface of the dispersion coating is further coated with a special coating for the purpose of preventing abrasive grains from falling off during grinding due to abrasion of the adhesive layer, adhesion during grinding, and clogging.

[Conventional technology]

Traditionally, grinding wheels have been manufactured using electrodeposition, resin bonding,
A grindstone is produced in which a grindstone layer containing abrasive grains of cubic boron nitride (hereinafter referred to as CBN), diamond, etc. is formed and fixed by a chemical plating method, a vitrified method, a metal bond method, or the like.

Fig. 3 shows a conventionally produced composite-treated grindstone, where (a) is a cross section, (b) is a longitudinal section,
(C) is an enlarged view showing details of the outer periphery of the grindstone. Conventionally, a composite coating of CBN or diamond abrasive grains 5 is applied to the surface of a base metal 1 made of iron, aluminum, carbide, ceramic, etc. by electrodeposition, chemical plating, resin bonding, metal bonding, or vitrified method. It formed layer 2. The size of the abrasive grains 3 ranges from several microns to hundreds of microns,
The particle size is changed depending on the purpose. Further, the bonding layer may be made of various metals, ceramics, or resins, and may have an arbitrary thickness.

As mentioned above, the electrodeposition method, resin bond method, and metal bond method are composites with metal or resin, and since the bond material is relatively soft, this gentle grinding wheel is susceptible to wear or clogging due to grinding powder. Adhesion phenomenon is likely to occur. Also,
The vitrified method involves composite sintering of ceramic particles, which is brittle and more likely to break than the bonds between particles, resulting in lower grinding efficiency and lower grinding accuracy.

[Problem that the invention seeks to solve]

The present invention improves the conventional composite grindstone as described above and provides a grindstone that can grind with high precision for a long time.

[Means for solving problems]

The present invention relates to a grinding wheel in which the surface of a grinding wheel base metal is coated with abrasive grains dispersed therein by electrodeposition or chemical plating, and is further coated with a hard coating.

[Effect]

The present invention will be explained below based on the drawings.

FIG. 1 is a sectional view of the grindstone of the present invention. ra) is a cross-sectional view showing the tip of the disc-shaped grindstone, and (b) is a view showing its details. In the figure, CBN or diamond abrasive grains 5 are composited on the surface of the grinding wheel base 1 by electrodeposition or chemical plating, and the surface of the gold coating layer 2 is coated with PVD or carbon.
A ceramic coating layer 4 of nitride, oxide, carbide, etc. is provided by the VD method.

As for the abrasive grains 3, a CBN grinding wheel or a diamond abrasive grain is suitable, and the grain size used ranges from several microns to hundreds of tens of microns depending on the conditions of use. In addition, the ceramic coating layer 4, which is a feature of the present invention, can be formed by Pvll treatment, such as ion blating method or electron beam evaporation, which is currently used in the industry, or by using a heat source such as an electron beam, plasma, or laser. Formed by CvD treatment. The film to be formed includes nitrides such as TIN, SI3N4, carbides such as TIC, NbC, Cr3C2, etc.
o.

Al40s * A coating mainly made of oxide ceramic such as T'Oz, which is hard and has low affinity with the iron-based material of the workpiece.

〔Effect of the invention〕

A grindstone manufactured with such a configuration has excellent grinding performance, and can perform stable grinding for a long time without worrying about clogging, adhesion, falling off of particles, wear, peeling, etc. of the grindstone.

Next, examples of the present invention will be shown.

Example As shown in Figure 2, carbon for mechanical structure! (S45C) Rotating with shaft ° 1 grain size + 140/Φ17 on the outer peripheral surface of grindstone base metal 1
0 CBN grinding wheel is coated with N by the commonly used electrodeposition method.
%, and then coated with a τIN film 5 of approximately 3 μm in thickness by the ion blating method to produce a CBN composite grinding wheel. As a comparison material, particle size +140/Φ
A grinding wheel with 170 CBIJ abrasive grains formed by electrodeposition was used, the peripheral speed of the wheel was 1500 m/decoy, and the cutting depth was 0.03.
High-speed steel was ground under the following conditions.

As a result of the grinding test, the comparative grinding wheel showed that the pNl layer was removed by grinding chips over the course of grinding time, and the grinding ability gradually decreased, but the grinding wheel of the present invention showed no change over time and continued to maintain good performance. Grinding was obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the grinding wheel of the present invention, and FIG. 2 shows the shape of the grinding wheel in an embodiment of the present invention. Figure 5 shows
This figure shows a conventionally manufactured disc-shaped grindstone. Sub-Agents 1) Meifuku Agent Ryo Hagiwara - 1 page continuation Inventor Hajime Yoshioka Inside Tatsumi Uzumasa-cho Machinery Works, Ukyo-ku, Kyoto City Inventor Yukio Itsukami Inside Tatsumi Uzumasa-cho Machinery Works, Ukyo-ku, Kyoto City

Claims (1)

[Claims] A grinding wheel in which the surface of the grinding wheel base metal is coated with abrasive grains dispersed by electrodeposition or chemical plating, and is further coated with a hard coating.