CS265675B1 - A method for producing a disc with a discontinuous abrasive layer - Google Patents

Abstract

The method of manufacturing a diamond wheel with an interrupted abrasive layer of the segment type, intended for peripheral grinding of, for example, glass and ceramics, solves the production and attachment of this layer to the circumference of the wheel by processing mainly metal or metal-ceramic abrasive mixtures containing diamond dust by the powder metallurgy process. The purpose of the solution is to shorten the production time, which is achieved by the fact that the said abrasive layer, which consists of segments in the shape of, for example, a diamond or a toothed ring that performs the function of segments, is formed and attached to the circumference of the wheel in one manufacturing operation in the said powder metallurgy process by a pressing tool equipped with two front toothed rings.

Description

(57) A method of manufacturing a segmented disc type abrasive diamond disc for circumferential grinding of, for example, glass and scallops, solves the manufacture and attachment of this layer to the disc periphery by processing mainly metallic or metal-ceramic abrasive compositions containing diamond dust containing powder metallurgy. The purpose of the solution is to reduce the production time achieved by the fact that the abrasive layer, which is formed by segments in the shape of, for example, a diamond or a toothed ring, which fulfills the function of the segments, is formed and fixed to the periphery of the disc in one production operation. a tool fitted with two spur gears.

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- · 1,265,675

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a segmented diamond abrasive layer disc intended for peripheral grinding and to the manufacture and fastening of this layer to the periphery of the disc by powder metallurgy.

Segmented diamond wheels, used for example in the glass industry, are characterized by reduced diamond dust consumption and higher grinding surface stability compared to wheels with a continuous abrasive layer. Known embodiments of these discs known from the literature are generally solved by separately preparing the segments and then attaching them to the periphery of the disc. This increases the production time so that the resulting price often exceeds the cost of a disc with a continuous abrasive layer.

and

This drawback removes the process according to the invention, characterized in that the intermittent abrasive layer consisting of segments of the shape of, for example, a diamond or a toothed ring which fulfills the function of the segments and which is produced by powder metallurgy is formed and in one manufacturing operation, at the sintering temperature of the abrasive mixture used, a pressing tool fitted with two opposing, spur-toothed rings forming part thereof. The toothing of said rings has the basic shape of, for example, an isosceles triangle with an apex angle of 45 to 60 ° and a height corresponding to 1/2 of the width of the abrasive surface, and rhombus segments are formed perpendicularly opposite to each other. / 4 to 1/2 pitch, the arrangement of the abrasive layer in the form of a toothed ring. Said abrasive composition is of a diamond dust content primarily of metal or metal-ceramic character.

- 2,265,675

Advances in the process of manufacturing a disc with a disc abrasive layer according to the invention are that the production time is substantially reduced while maintaining all the advantages of the segment type discs.

Example 1 j

The diamond-shaped intermittent abrasive layer, which is formed by diamond-shaped segments, is produced by processing a metal abrasive composition containing a diamond dust containing powder metallurgy process in which it is formed and fastened to the periphery of the disc in one production operation at the sintering temperature of the abrasive composition. two opposing, spur gears with an isosceles triangle shaped at an angle of 45 °> where the tooth tips are oriented perpendicular to each other®

Example 2:

Intermittent abrasive layer of diamond disc which is formed with a gear ring, is made by processing kovověkeramické grinding a mixture containing diamond dust powder metallurgy, in which is formed and fixed on the circumference of the disc in a single operation at the sintering temperature of the used abrasive composites pressing tool _and mounted two mA opposed, spur-toothed circles, with an isosceles triangular toothing with a 60 ° apex angle, the tooth tips being offset by 1/2 pitch.

The method for producing a disc with a disc abrasive layer according to the invention is suitable for producing abrasive discs intended for peripheral grinding of, for example, glass and ceramics with a flat, radius or angular profile of the abrasive layer.

Claims (1)

SCOPE OF THE INVENTION 265675 A method for producing a diamond wheel and a disc abrasive layer formed by segments or a toothed ring produced and fixed to the periphery of a wheel in a powder metallurgy manufacturing operation, characterized in that the segments or toothed ring are formed and fixed to the wheel periphery at a sintering temperature a pressing tool fitted with two opposing, spur-toothed rings.