RU2479410C1 - Method of making cutoff diamond wheel - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to abrasive tools and may be used for making cutoff diamond wheels. Proposed method comprises forming the wheel working surface by electrolytic deposition of diamond coating on wheel body. Prior to electrolytic deposition, electric insulation is applied on wheel body surface, lengthwise grooves are made in said body to preset geometry and said electric insulation is removed. Note here that electrolytic deposition of diamond-bearing material is made at two steps: first step is executed after making holes to be filled with diamond-bearing material while second step is realised after removal of electric insulation.

EFFECT: thicker wheel working surface, hence, longer life.

3 dwg

Description

The invention relates to the field of engineering, in particular to tools for abrasive processing, and can be used in the manufacture of cutting diamond wheels.

A known method of manufacturing a diamond tool, in which diamond powder is mounted on the tool body by the galvanic method (USSR Author's Certificate No. 833439, B24D 17/00, 1981).

The disadvantage of this method is the short life of the diamond cutting tool, due to the small thickness of the working part, equal to the thickness of the diamond layer on the periphery of the circle.

The closest technical solution to the proposed invention is a device - a cutting abrasive wheel, made in the form of a disk case with an abrasive layer located at its ends and periphery, in which the method is described, which consists in forming the working part of the wheel by galvanic deposition of diamondiferous material on the wheel body (Copyright USSR certificate No. 1738626, B24D 5/12, 1984).

The disadvantage of this circle is also the short tool life, due to the small thickness of the working part, equal to the thickness of the diamond layer on the periphery of the circle.

The problem to which the claimed invention is directed, is to increase the thickness of the working part of the abrasive wheel, which ultimately increases the resource of his work.

This technological result is achieved by the fact that in the method of manufacturing a cutting diamond wheel, which consists in forming the working part of the wheel by galvanic deposition of diamond-bearing material on the wheel body, according to the invention, before galvanic deposition, an insulating material is applied to the surface of the diamond-bearing material body, followed by shaping in the case of longitudinal holes given geometrical parameters and removal of electrical insulation material, p and that the galvanic deposition is carried out in two stages, the first - after the formation of holes, with the possibility of filling said apertures diamond-bearing material, and the second - after removal of the insulating material.

The invention is illustrated by drawings,

where in Fig.1 shows a side view of a cutting diamond wheel,

figure 2 is an enlarged side view of the working part of the circle made in it with longitudinal holes,

figure 3 is a section of the working part of the circle,

where respectively depicted

1 - diamondiferous material

2 - the body of the cutting diamond wheel,

3 - longitudinal holes made in the body of the cutting diamond wheel,

4 - directly the working part of the cutting diamond wheel.

A method of manufacturing a diamond cutting wheel is as follows.

Precipitation of diamondiferous material 1, consisting of a diamond powder with a grain size, for example, from 25 to 200 microns, and a binder, for example nickel, is carried out by the galvanic method in two stages. At the first stage, an insulating material, for example, based on unmodified epoxy resins, is applied to the casing 2 of the cutting diamond wheel, then longitudinal openings 3 are formed in the casing 2 by any method known from the prior art, for example by stamping, so that the diamond-bearing material 1 during galvanic deposition fills the holes 3 completely, and the gap between the holes 3 does not exceed their smallest transverse dimension (for example, the diameter of the inscribed circle for holes with a cross section in the form of a regular hexagon), while forming with the diamond-bearing material 1 the working part 4 of the circle. After this, the diamond-bearing material 1 is deposited by a galvanic method with the longitudinal holes 3 filled in the housing 2. At the second stage, the diamond-bearing material 1 is deposited by the galvanic method on the surface of the working part 4 of the circle 2 body, but before that, the insulating material is removed from the surface of the body 2.

Thus, the presence of holes 3, which are completely filled with diamond-bearing material 1, allows to increase the thickness of the working part 4 of the wheel, due to which the peripheral cutting surface of the wheel retains its cutting properties and retains them until the working part 4 of the wheel is completely worn out, which proven in practice.

At the production site of GOU VPO MSTU "STANKIN" the tests of the proposed method have been tested, namely, in the manufacture of a diamond cutting wheel with a diameter of 125 mm and a thickness of 1.6 mm, designed for cutting granite and ceramic tiles.

Precipitation of diamondiferous material 1, consisting of a diamond powder with a grain size of 100 μm and a nickel binder, was carried out by the galvanic method in two stages. At the first stage, an insulating material based on unmodified epoxy resin was applied to the casing 2 of the cutting diamond wheel, then longitudinal cylindrical holes 3 with a diameter of 500 μm were formed by stamping in the casing 2 so that the diamond-bearing material 1 during galvanic deposition completely filled the holes 3 and the gap between the holes 3 did not exceed their diameter, while forming with the diamond-bearing material 1 the working part of 4 circles. After this, the diamondiferous material 1 was deposited by a galvanic method with the longitudinal holes 3 filled in the housing 2. At the second stage, the diamondiferous material 1 was deposited by the galvanic method on the surface of the working part 4 of the circle 2 body, but before that the insulating material was removed from the surface of the body 2.

Due to the described interrelated actions in the manufacture of cutting diamond wheels, the thickness of the working part 4 is significantly increased. When a diamond cutting wheel is used after wearing diamond-bearing material 1 located on the peripheral surface of the circle, due to diamond-bearing material 1 filling the longitudinal holes 3, sections are formed on the peripheral surface of the circle containing diamondiferous material 1, thus the peripheral surface of the circle retains its cutting properties and retains them until ka completely worn out working part 4 laps. The thickness of the working part 4 of the circle is determined by the size of the area of the longitudinal holes 3 in the housing 2, and not the thickness of the diamond-bearing material 1 on its peripheral surface. In this case, the cutting diamond wheel is devoid of the drawback that is present in its manufacture by the method of multilayer deposition of diamondiferous material 1 on the wheel body 2 to increase the thickness of the working part 4 - increasing the width of the working part 4 on the periphery of the circle, leading to an increase in the width of the cut.

The analysis of the claimed technical solution for compliance with the conditions of patentability showed that the characteristics indicated in the independent paragraph of the formula are significant and interconnected with each other with the formation of a stable aggregate, not known at the priority date from the prior art, of the necessary features sufficient to obtain the required synergistic (over-total) technical result .

The properties regulated in the claimed compound by individual features are well known in the art and require no further explanation.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed technical solution:

- the object embodying the claimed technical solution, when implemented, is intended for use in the field, for the manufacture of metal cutting tools and can be used for sharpening drills;

- for the claimed object in the form described in the independent claim, the possibility of its implementation using the means and methods known from the prior art on the priority date on the priority date has been confirmed;

- the object embodying the claimed technical solution, when implemented, is able to ensure the achievement of the technical result perceived by the applicant.

Therefore, the claimed subject matter meets the requirements of patentability “novelty”, “inventive step” and “industrial applicability” under applicable law.

Claims (1)

A method of manufacturing a cutting diamond wheel, including the formation of the working part of the wheel by galvanic deposition of diamond-bearing material on the wheel body, characterized in that before galvanic deposition on the surface of the diamond-bearing material is applied an insulating material with subsequent shaping in the body of the longitudinal holes according to the set geometric parameters and removing the insulating material while galvanic deposition of diamondiferous material is carried out in two of these pa, the first after the formation of holes, with the possibility of filling these holes with diamond-bearing material, and the second after removing the insulating material.

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