JPS6316975A - Grinding tool - Google Patents

Abstract

PURPOSE:To prevent chips from deposition and loading and thereby cutting force from reduction by coating titanium system ceramic compound on the surface of a blade having ultrahard grains secured fixedly to form an anti- deposition layer. CONSTITUTION:Ultrahard grains 1 like diamond or CBN are secured fixedly to the surface of a tool body 2 of quenched high speed steel or tool steel by an electrodeposition means or the like. And on the layer having the grains 1 secured fixedly is formed an antideposition layer 3 of a coating film of titanium system ceramic compound having high antideposition property. Then, while the coating film is worn and lost from that on the top of convex grains 1 as the tool is used, the antideposition layer 3 of coating film remains between the grains 1 to prevent the deposition, loading due to the deposition and the cutting force from degradation. Also, the remaining antideposition layer 3 prevents the grains 1 from dropping out of the tool body 2 for elongating the life of tool body.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a grinding tool to which ultra-hard abrasive grains are fixed.

[Problems with conventional technology]

Grinding is a high-speed cutting operation in which the sharp edges of the abrasive grains on the surface of the grinding wheel scrape off minute chips from the surface of the workpiece by rotating the grinding wheel at high speed. The cutting speed of general cutting using high-speed steel tools is 30 m/min or less, and in the case of using cemented carbide steel tools, the limit is t) 50 to 60 m/min. In comparison, the cutting speed for grinding is l 50m/
The friction between the preview and the workpiece causes various problems. For example, because the tool rotates at too high a speed, chips stuck in the gaps on the surface of the tool's grinding wheel are welded by frictional heat, and the cutting 411 lubricates and cools the tool. This resulted in a decrease in grinding power.

[Purpose of the invention] The present invention has been devised in view of the above problems and to effectively solve them. Therefore, it is an object of the present invention to provide a grinding tool that is resistant to welding and prevents clogging. [Means to solve the problem]

The grinding tool according to the present invention is a grinding tool in which ultra-hard abrasive grains are fixed to the blade part of the tool, and the surface of the blade part to which the ultra-hard abrasive grains are fixed is coated with a titanium-based ceramic compound to prevent welding. layers are formed. Note that this anti-adhesion layer is preferably formed by coating by a PVD method.

[Effect] According to the grinding tool of the present invention, the adhesion prevention function that is insufficient with lubrication and cooling using cutting oil is compensated for by the adhesion resistance of the titanium-based ceramic compound, which prevents welding and clogging of chips and reduces grinding force. prevent. 【Example】

A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 2.
This will be explained with reference to the figures. FIG. 1 is an enlarged sectional view showing the surface of a grinding tool according to the present invention. Diamond or CBN (cuhic)
Super hard abrasive grains 1 such as boron n1tride) are
It is fixed to the surface of the tool body 2 made of hardened high-speed steel or tool steel by means such as electrodeposition. On the layer to which the abrasive grains 1 are fixed, a welding-resistant layer 3 is formed by a coating film of a titanium-based ceramic compound having high welding resistance. The tool shape may be a regular grinding wheel surface with no grooves or recesses on the surface, or it may have twisted grooves or cross grooves on the surface, as well as a large number of grinding oil reservoirs or grinding oil supply holes. It can be applied even if In addition, as the usage progresses, the coach ink film wears out from the top of the convex abrasive grains 1. However, as shown in FIG. 2, the welding-resistant layer 3 of the coating film remains between the abrasive grains 1, and welding and clogging due to welding can be prevented. In addition, in the remaining welding resistant layer 3, the abrasive grains 1 are removed from the tool body 2.
This prevents it from falling off, extending its lifespan.

【Effect of the invention】

As is clear from the above description, the present invention provides the following excellent effects. That is, the adhesion resistance of the titanium-based ceramic compound prevents the adhesion of chips and prevents a decrease in grinding force due to clogging.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view showing the surface of a grinding tool according to the present invention, and FIG. 2 is a cross-sectional view showing a state in which the anti-weld layer has been worn out in this embodiment. 1...Abrasive grains, 2.Tool body, 3...Welding resistant layer Patent applicant: Kobe Steel Co., Ltd., representative patent attorney, mentioned above (2 others) -4~

Claims (2)

[Claims] (1) In a grinding tool in which ultra-hard abrasive grains (1) are fixed to the surface of a tool body (2), a titanium-based ceramic compound is attached to the surface of the tool body (2) to which the ultra-hard abrasive grains are fixed. A grinding tool characterized in that a welding-resistant layer (3) is formed by coating. (2) The adhesion-resistant layer (3) is made of a titanium-based ceramic compound formed by PVD (physicai vapor dep.
2. The grinding tool according to claim 1, which is formed by coating the grinding tool by a coating method.