SU1316804A1 - Method of producing diamond tool - Google Patents

Abstract

The invention relates to the field of manufacturing diamond tools and improves the quality of manufacturing multilayer diamond tools. The method includes the preliminary deposition of diamond grains, their final fixing on the body with a metal binder and opening, at which the application of diamond grains is carried out on a supporting substrate in the form of a wire or thread. The carrier base is wound on the tool body with a distance between adjacent turns equal to 0.8-2.0 of the average grain diameter. Before the final consolidation of the grains together with the carrier, the basis between the coils is filled with an additional diamond powder or diamond-containing mixture. 8 il. with CO O) 00 o and

Description

The invention relates to the technology of making diamond tools in a metal bond, mainly: for stripping and rough grinding of the shaped ar surfaces: architectural products made of building materials — marble, granite, etc.

The purpose of the invention is to increase the tool durability by increasing the density of alaz grains.

FIG. 1 shows schematically a device for applying diamond grains to a carrier base by gluing; Fig 2 - the same, electroplating; in fig. 3 shows the node I in FIG. 2; FIG. 4 is a top view of FIG. 2; FIG. 5, node II in FIG. 4; in fig. 6 shows a profile housing with a base wound thereon, section, in FIG. 7 - filling the gaps between coils with diamond grains; in fig. 8 - the same diamond-bonded bond.

Diamond grains are pre-worn on a carrier base by various methods, for example, by gluing or electroplating nickel. In the first case, diamond grains are applied on a non-supporting base (metal wire, nylon thread) 5 are pulled successively through the vessel 2 with glue, the vessel 3 with diamond powder, sushi: ilku 4, node 5 remove excess grains and wound on a drum 6, driven by a drive 7. The device can operate in automatic mode. The glue, after drying, must be resistant to softening or dissolving in the electrolyte, -applied for fixing diamonds by electroplating nickel.

In the second case, the carrier base, in which metal wire is used, is installed in a device for applying diamonds by electroplating. The device consists, for example, of a porous non-metallic cylinder 8 (grid), along which the edges 9 are placed. The transverse grooves are made on the edges along a helical line, into which the wire 10 is laid. The coils of the wire are connected by longitudinal current rods 11, intended - to reduce the current density in the wire. An outer porous cylinder 12 (mesh) is put on the ribs.

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forming together with the cylinder 8 and the base 3 a cavity for filling the diamond powder.

The further process of applying al-ij ointment grains to the wire by electroplating is carried out according to a known technology. In this case, the grains are applied to the wire 10 only in the areas lying between the ribs, and

No areas located in the grooves of the ribs are covered with nickel. This provides the flexibility of the base and the formation of a segmented diamond layer on it.

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After receiving the carrier base with diamond grains deposited on it, it is wound onto the tool body 14. In order to more firmly hold the carrier base 15 with deposited grains, additional protrusions (burrs) 16 are made on the complex surface of the body 14. In order to create a high density of diamond grains in the intervals between the turns of the carrier base I5, they are wound on the body with equal to 0.8-2.0 of the average diameter of the diamond grain D - ,,, and then fill the gaps with additional diamond grains 17 (Fig. 4) or diamond-containing bond 18 by pouring onto the surface of the body 14 and pressing, for example manually. The sections of the bearing base 15 with grains deposited on it in the planes perpendicular to the axial line of the bearing base will have completely different profiles due to the uneven and chaotic fastening of the grains

40 on a carrier basis. When winding with a step smaller than 0.8 of the average diameter of the grain, filling the gaps is difficult. The gap between the coils becomes commensurate with the grain size and

45 there is only a partial filling of the gaps, which will hurt the operating properties of the tool. Therefore, it is necessary to manually refill free spaces with grains

50, which is a very laborious process (as compared to electroplating) and leads to a lengthening of the tool manufacturing process. When winding with a gap between the coils, bol -; shim

55 2.0 of the average diameter of the diamond grain, the grains are poorly maintained between the turns (fall out), which also leads to a deterioration in the quality of the tool. To prevent this

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It means that it is necessary to re-fill the inter-turn intervals, which also lengthens the manufacturing process of the tool. Elongation occurs due to the operation of re-filming of the grains of each layer by electroplating for 1-2 days. When wound with a gap equal to 0.8-2.0 of the average diameter of the diamond grain, 1-8 grains are retained in the cross section of the gaps. After final fixing of the bearing base 15 with deposited diamond grains and additional diamond grains 17 on the housing 4, galvanic deposition of nickel or soldering is performed on the body 4 by opening the diamond grains on the working surface of the tool by means of mechanical processing.

Etc . and me. The tool is manufactured with the following initial data: Diamond powder grain size (average diameter - 400/315. Grain diameter 450 microns) Tool diameter, mm 240 Radius of the profile part, mm75 Tool length, mm 200 Diameter of the bearing base (wire), mm 0.45 The base material is copper, and the body is steel. In order to apply diamond grains to the carrier base by gluing, a universal moment glue is used in the fixture (Fig. 1).

The passage through the vessel 2, the wire 1 is wetted with glue, to which diamond grains in turn adhere when the wire passes through the vessel 3. In the dryer at 150-180 ° C, the adhesive polymerizes. In node 5, removing the excess grains, the brushes scrape the grains adhering to the first firmly fixed one. on the wire layer of grains. Then the wire is wound onto a drum 6.

Before winding the carrier base 15 with deposited grains on the tool body 1A, they form burrs 16 that hold the base on the profile surface, then the body is coated with a layer of nickel and copper with a galvanized method. After carrier winding

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The bases 15 on the body 14 are fixed in the air or in water by electroplating nickel by electroplating, and then the diamond grains are opened. When diamond grains are deposited on the carrier base by electroplating nickel in the fixture, wire 1 is crushed with a layer of nickel, then diamond powder is poured into the cavity between

porous cylinders 8 and 12 and the deposition of nickel grab a layer of grains adjacent to the wire 1. Subsequently, the remaining grains are poured out of the cavity and the deposited grains are additionally fixed by deposition of nickel.

Before winding the carrier base 15 with the applied grains on the tool body 14 form burrs 16,

holding the base On the complex surface, then the base 15 is wound with a distance between the turns equal to 1.5 of the average grain diameter. After that, the horizontally located areas of the complex surface are moistened with alcohol, sprinkled with a diamond-containing mixture consisting of copper, tin, and titanium hydride, and then, manually pressing in

With a roller or roller, the gaps between the turns are filled. Then a layer of pure charge is applied, which plays the role of solder during vacuum sintering, sintering is performed in a vacuum

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Claims (1)

Invention Formula five A method of making a diamond tool, in which diamond grains are applied to a base in the form of a wire or thread, is then wound onto the tool body and fixed on it, which is different from the fact that, in order to increase the tool wear resistance, the base is wound with the gap between the turns is equal to 0.8-2.0 of the average diameter of the diamond grain, and before being fixed on the case, the intervals between the turns of the warp are filled with diamond grains or diamond-containing binder. 0 fpue.3 (pue.f srig4 eight .ten 9os  12 Ff P Fig5 FI.6 4i. V e. fie.8 Editor E. Sligan Compiled by V.Vorobyov Tehred N.Glushchenko Order 2386/12 Circulation 715 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-355, Raushsk nab., 4/5 Production and printing company, Uzhgorod, “Projectna St., 4 Proofreader V. But ha