JP2003326462A - Grinding wheel and method of manufacturing the grinding wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding wheel allowing a service life to be increased by making it difficult for a shape to be collapsed even if the grinding wheel is used for a long period. <P>SOLUTION: This grinding wheel 1 comprises a projected part 11 provided on the outer peripheral part of a wheel body 4 so as to be projected to the outer end thereof. Abrasive grains 22 are electrodeposited on the surface of the projected part 11 by plating, and the surface is lapped to form a grinding part 5. The grinding wheel body 4 is rotated to grind a work by the grinding part 5. A coated layer 21 is formed on the surface of the grinding part 5. The coated layer 21 is formed of a metal compound containing Ti. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding wheel for grinding a work, and more particularly to a grinding wheel that suppresses wear and can be used for a long time, and a method for manufacturing the grinding wheel.

[0002]

2. Description of the Related Art Generally, various types of grindstones have been proposed for machining and polishing a work to form a groove of a gear or a spline groove. For example, an abrasive grain is fixed to a base metal of a wheel body. There has been proposed a grinding wheel that grinds a work by an abrasive grain layer fixed by rotating a wheel body.

Conventionally, as these grinding wheels, a metal base of a wheel body having a projecting portion projecting toward the outer end on the outer peripheral portion thereof is electrodeposited by plating with abrasive grains to form electrodeposition. It is known to form a ground surface by polishing the surface by a polishing process using diamond called lapping.

[0004]

In the conventional grinding wheel described above, since the abrasive grains are directly exposed to the outside, the abrasive grains are partially worn and lose their shape when used for a long period of time. Therefore, there is a problem that the grinding wheel has a short life because it needs to be replaced.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a grinding wheel which is less likely to lose its shape even after long-term use and has a long life. Especially.

[0006]

In order to achieve the above object, the present invention proposes the following means. In the invention according to claim 1, a protrusion is formed on the outer peripheral portion of the wheel body so as to protrude toward the outer end, abrasive grains are electrodeposited by plating on the surface of the protrusion, and the surface is further lapped. A grinding wheel is formed by grinding the workpiece by the grinding unit by rotating the wheel body, and a coating layer is formed on the surface of the lapping grinding unit. Characterize.

According to the grinding wheel of the present invention, the outer peripheral portion of the wheel body is provided with the protruding portion protruding toward the outer end, and the abrasive grains are electrodeposited by plating on the surface of the protruding portion,
Further, the surface is lapped to form a grinding portion, and a coating layer is formed on the surface of the grinding portion. Therefore, when grinding is performed using the grinding wheel, the coated grinding portion does not touch the workpiece. Grind. Since the abrasive grains are protected by the coating layer, abrasion of the abrasive grains is suppressed in the grinding portion, the shape is stably maintained, and the life of the grinding wheel can be extended.

The invention according to claim 2 is the grinding wheel according to claim 1, characterized in that the coating layer is composed of a metal compound containing Ti.

According to the grinding wheel of the present invention, since the coating layer is made of a metal compound containing Ti, when the grinding wheel is used for grinding, the metal compound containing Ti is Grind the work.
Since the metal compound containing Ti surely protects the abrasive grains, the shape of the grinding portion is stably maintained and the life of the grinding wheel can be extended.

According to a third aspect of the present invention, there is provided a method of manufacturing a grinding wheel, wherein a grinding protrusion projecting toward an outer end is formed on an outer peripheral portion of the wheel body. The method is characterized in that abrasive grains are electrodeposited by plating, the surface on which the abrasive grains are electrodeposited is polished by lapping, and a coating layer is formed on the surface after lapping.

According to the method of manufacturing a grinding wheel according to the present invention, abrasive particles are electrodeposited on the surface of the protruding portion of the wheel body by plating, and the surface on which the abrasive particles are electrodeposited is polished by lapping and lapping is performed. A coating layer is formed on the exposed surface. At this time, the abrasive grains are lapped so that the protrusion heights to the outside are substantially uniform, and the surfaces of the abrasive grains that are substantially uniform are coated. Since the abrasive grains are protected by the coating layer, when the work is ground using this grinding wheel, the shape of the grinding portion is stably maintained, and the life of the grinding wheel can be extended.

The invention according to claim 4 is the method for manufacturing a grinding wheel according to claim 3, wherein the coating means for the coating layer is a physical vapor deposition method or a chemical vapor deposition method.

According to the grinding wheel manufacturing method of the present invention, since the coating means for coating the coating layer is a physical vapor deposition method or a chemical vapor deposition method, the coating layer is reliably formed. Therefore, the outer shape of the coated grinding portion is formed to be substantially the same as the outer shape of the grinding portion after lapping, so that it is possible to suppress a decrease in grinding ability.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the invention. In the figure, 1 is a grinding wheel.

In the grinding wheel 1, abrasive grains 22 are electrodeposited on the protruding portion 11 of the wheel body 4 to form a grinding portion 5, and a coating layer 21 is formed on the surface of the grinding portion 5. . The wheel body 4 is formed in a disc shape as a whole, and includes a disc portion 6 and an outer peripheral portion 7 formed on the outer periphery of the disc portion 6. A through hole 8 penetrating in the axial direction is formed in the center of the disc portion 6, and an insertion hole is provided between the outer periphery of the disc portion 6 and the through hole 8 along the circumferential direction of the disc portion 6. A plurality of 9 are formed. The outer peripheral portion 7 includes a support portion 10 that is continuously connected to the disk portion 6 and a protruding portion 11 that protrudes toward the outer end direction.

As shown in FIG. 2, the grinding section 5 includes a bonding material 2
The abrasive grains 22 are electrodeposited on the surface of the protruding portion 11 by plating through 3. The surface of the grinding portion 5 is polished by lapping. As a result, the upper surfaces of the abrasive grains 22 forming the grinding portion 5 are formed to have substantially the same height. A coating layer 21 is formed by vapor deposition on the surface of the ground portion 5 that has been lapped by a chemical vapor deposition method or a physical vapor deposition method. Coating layer 21
Is formed along the surface of the lapping-processed grinding section 5, and the outer shape of the coated grinding section 5 is substantially the same as the outer shape of the grinding section 5 after lapping.
Among the coating layers 21, those located on the upper surface and side surfaces of the abrasive grains 22 are referred to as coating portions 21a and 21b, respectively, and those located on the surface of the bonding material 23 are referred to as coating portions 21c. Nickel, for example, is used as the bonding material 23, and CBN, for example, is used as the abrasive grains 22. The coating layer 21 is made of TiN,
It is composed of a titanium-based metal compound such as TiC, TiCN, and TiAlN.

Next, a method of manufacturing the grinding wheel will be described. First, the abrasive grains 22 are positioned on the protrusion 11 of the wheel body 4, and plating is performed in a plating solution with the wheel body 4 as a cathode. Next, the formed electrodeposition surface (surface of the grinding portion 5) is lapped with diamond. In this state, the upper surface of each abrasive grain 22 consisting of one layer is ground by diamond to have substantially the same height.

After the shape is shaped by lapping, the grinding portion 5 is heated as a substrate to coat the coating layer 2 on the substrate.
The coating layer 21 is vapor-deposited on the surface of the grinding portion 5 by flowing the mixed gas that constitutes No. 1. In this state,
A coating layer 21 is formed on the surface of the grinding portion 5, and the abrasive grains 22 and the bonding material 23 are covered with the coating layer 21.

Next, the operation of grinding using the grinding wheel manufactured by the above method will be described. When the grinding wheel 1 is rotated to grind a work (not shown), each abrasive grain 22 forming the grinding unit 5 scrapes off the surface of the work. The abrasive grains 22 finely scrape off the surface of the work, whereby chips are formed between the grinding portion 5 and the work.

At this time, on the upper surface and the side surface of the abrasive grain 22,
Since the coating portions 21a and 21b are formed,
The abrasive grains 22 are not partially directly worn or broken by the chips. Further, since the coating portion 21c is also formed on the surface of the bonding material 23, the abrasive grains 22 will not fall off from the bonding material 23 due to the abrasion of the bonding material 23 by the chips. That is, since the abrasive grains 22 and the bonding material 23 are coated, the grinding portion 5
The entire shape of the work piece is not broken, and the work is always ground in a stable shape. In particular, the coating layer 21 is made of Ti
This tendency is intensified when the metal compound of the system is used.

According to the above construction, since the abrasive grains are protected by the coating layer, abrasion of the abrasive grains is suppressed and the shape is stably maintained in the grinding portion, and the life of the grinding wheel can be extended. it can. Further, since the metal compound containing Ti surely protects the abrasive grains, the shape of the grinding portion is stably maintained, and the life of the grinding wheel can be extended. Furthermore, since the outer shape of the coated grinding portion is formed to be substantially the same as the outer shape of the grinding portion after lapping, it is possible to suppress a decrease in grinding ability.

[0022]

As described above, according to the invention of claim 1, since the abrasive grains are protected by the coating layer, abrasion of the abrasive grains is suppressed and the shape is stably maintained in the grinding portion. As a result, the life of the grinding wheel can be extended.

According to the invention of claim 2, Ti
Since the metal compound containing is surely protects the abrasive grains, the shape of the grinding portion is stably maintained, and the life of the grinding wheel can be extended.

Further, according to the invention of claim 3, since the abrasive grains are protected by the coating layer, the shape of the grinding portion is stably maintained when the work is ground by using this grinding wheel. The life of the grinding wheel can be extended.

Further, according to the invention of claim 4, the outer shape of the coated grinding portion is formed to be substantially the same as the outer shape of the grinding portion after lapping, so that the reduction of the grinding ability can be suppressed.

[Brief description of drawings]

FIG. 1 is a sectional view showing a grinding wheel according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a grinding portion of the grinding wheel according to the embodiment of the present invention.

[Explanation of symbols]

1 grinding wheel 4 wheel body 5 Grinding section 11 Projection 21 coating layer 22 Abrasive grain

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Claims (4)

[Claims] 1. A wheel body is formed with a protrusion protruding toward an outer end, an abrasive grain is electrodeposited on the surface of the protrusion by plating, and the surface is further lapped to form a grinding portion. And a coating layer is formed on a surface of the lapping-processed grinding part. Grinding wheel. 2. The grinding wheel according to claim 1, wherein the coating layer is composed of a metal compound containing Ti. 3. A method of manufacturing a grinding wheel, wherein a grinding protrusion protruding toward an outer end is formed on an outer peripheral portion of a wheel body, wherein abrasive grains are plated on a surface of the protrusion of the wheel body. A method for producing a grinding wheel, which comprises electrodeposition, polishing a surface on which abrasive grains are electrodeposited by lapping, and forming a coating layer on the surface after lapping. 4. The method of manufacturing a grinding wheel according to claim 3, wherein the coating means for coating the coating layer is a physical vapor deposition method or a chemical vapor deposition method.