RU2073599C1 - Cutting segment wheel and method of manufacturing same - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: cutting wheel provided with radial slots between segment has housing made up a metallic disk over periphery of which diamond segments are secured to shaped segment projections. The segment projections, which form radial slots between segments, are provided with additional dovetail projections of less length. The end face surfaces of the projections are provided with concentric grooves, that are arranged on both sides and shifted with respect to each other, and shaped dovetail grooves. The method of manufacturing the cutting diamond segment wheel comprises forming a solid ring diamond layer on a housing blank by cold pressed fitting and caking and then cutting out radial slots between segments in the diamond layer and housing until they enter the end face openings interposed between the projections to form the diamond segments. The housing blank is made up as a disk provided with trapezium grooves and through end face openings positioned at sites where the radial slots pass. EFFECT: enhanced reliability. 2 cl, 3 dwg

Description

 The invention relates to the field of engineering, namely to abrasive disk tools, and can be used in the manufacture of diamond cutting segment wheels with inter-segment cuts.

 Cutting diamond wheels are known from the prior art, containing a metal case in the form of a disk, on the periphery of which a diamond-bearing layer of individual segments is fixed, and inter-segment cuts are made in the case (see ed. St. USSR N 402459, class B 24 D 5/10 , 1973 aut. St. USSR N 1133077, CL 24 D 5/10, 1989 aut. St. USSR B 1828800, CL 24 D 5/10, 1933 US patent N 3028710, cl 51-206.4, US patent N 3069816, CL 51-206.4, 1962; US patent N 3443343, CL 51-206.4, 1969; US patent N 3490539, CL 51-206.4, 1971; US patent N 4689919, CL 51-206.4, 1987).

 To increase the strength of attachment of segments to the body, as a rule, known devices use an intermediate metal substrate (rim) with a developed contact surface, which significantly complicates the design and manufacturing technology of the cutting diamond wheel.

 Closest to the invention in terms of features is a cutting diamond segmented wheel containing a body in the form of a metal disk with radial intersegment cuts and a diamond layer of individual segments that are mounted on protrusions located on the periphery of the body (see US patent N 3146551, CL 51 -206.4, 1964).

 The segments have a recess corresponding in shape to the protrusions of the housing, which develops a contact surface and to some extent increases the bond strength of the segments with the housing. Also known is a method of manufacturing a cutting diamond segmented wheel, which includes sintering individual segments from diamond-containing powder with metal additives and fixing them (mainly by soldering) on the protrusions of the metal body located between the radial intersegment slots (see US patent N 3146551, CL 51- 206.4, 1964). The disadvantage of this method can be attributed to the complexity of technological equipment and the insufficient strength of the connection of the segments with the housing.

 The invention is aimed at increasing the strength of the connection of diamond segments on the body of the cutting wheel with intersegment slots and simplifying the technology of its manufacture.

 The solution to this problem is ensured by the fact that in the cutting diamond segment wheel containing a body in the form of a metal disk with radial intersegment slots and a diamond layer of individual segments that are mounted on the segment protrusions located on the periphery of the housing according to the invention, additional protrusions of smaller lengths in the form of a "dovetail", and concentric curly grooves are formed on their end surfaces on both sides.

 To increase the fastening strength of diamond-bearing segments on the peripheral surface of each of the additional projections of the body, grooves in the form of a “dovetail” are arranged along the axis, and the concentric curly grooves on different sides are offset relative to each other in the radial direction.

 Moreover, in the method of manufacturing a cutting diamond segmented wheel, in which a diamondiferous layer is formed and sintered from a diamond-containing powder with metal additives and fixed on a disk case with radial inter-segment cuts according to the invention, trapezoidal grooves are initially made on the case, and through holes are made on its end, then diamond-containing powder with metal additives is formed into a continuous diamond-bearing layer and its fixing is carried out by cold pressing the housing and sintering, wherein the slit is performed in a diamondiferous layer and in the housing to the exit end of a through-hole to form diamond segments.

 The presence of trapezoidal protrusions and grooves in the form of a "dovetail" and concentric grooves on the surface of the protrusions increases the strength of fixing segments on the body, and the formation by cold pressing and sintering of a continuous annular diamondiferous layer directly on the workpiece with subsequent cutting of the radial intersegment slots at the location of previously made holes significantly tames the hardware design and manufacturing technology of cutting diamond wheels with inter-segment slots.

 In FIG. 1 shows a general view of a cutting diamond segment wheel; in FIG. 2 case blank; in FIG. 3, section I-I in FIG. one.

 The cutting segment wheel contains a housing made in the form of a metal disk 1, on the periphery of which diamond segments 3 are fixed on the figured segmented projections 2 in the form of a “dovetail”. The protrusions 2 are formed by trapezoid grooves expanding toward the center, the smaller width “b” of which is greater than the width ” d "radial intersegment slots. Moreover, on the end surfaces of the protrusions 2 there are made concentric curly grooves 4 located with a radial offset "Δ" relative to each other on both sides, and curly grooves (grooves) 5, for example in the form of a "dovetail".

 The manufacture of a diamond cutting segment wheel with inter-segment cuts is as follows.

Initially, a body blank is prepared (see Fig. 2) in the form of a metal disk 1 with trapezoidal grooves forming segmented protrusions 2 in the form of a dovetail, between which end-to-end openings 6 are placed at the passage of the radial intersegment slots, while on the protrusions 2 curly grooves 5 and concentric grooves are performed 4. Then, a body blank is put into the mold, diamond-containing powder with metal additives, including copper, tin, nickel, cobalt and hard alloys of other metals, is poured in, and produce cold overmolding continuous annular diamond layer on a metal disk 1, followed by sintering in an oven at a temperature of 600-850 ^o C and hot dopressovkoy sintered preform. After cooling, the formed diamond wheel is removed from the mold and, in the diamondiferous layer and in the body, radial inter-segment cuts are performed (for example, using a laser beam) until they exit into the openings 6, thereby forming diamond segments 3 on the protrusions 2.

Claims (3)

 1. Cutting diamond segment wheel containing a body in the form of a metal disk with inter-segment cuts and a diamond layer of individual segments that are mounted on segment protrusions located on the periphery of the housing, characterized in that additional protrusions of a lesser length in the form of a dovetail are made on the segment protrusions , and on their end surfaces, concentric curly grooves are formed on both sides.  2. The circle according to claim 1, characterized in that on the peripheral surface of each of the additional protrusions, grooves in the form of a dovetail are arranged along the axis, and the concentric curly grooves on different sides are offset relative to each other in the radial direction.  3. A method of manufacturing a cutting diamond segmented wheel, in which a diamond-bearing layer is formed and sintered from a diamond-containing powder with metal additives and fixed on a disk case with inter-segment cuts, characterized in that trapezoidal grooves are made on the case and through holes are made on its end, then diamond-containing powder with metal additives is formed in the form of a continuous diamondiferous layer and its fixing is carried out by cold pressing on the body and sintering, while Zi is performed in the diamondiferous layer and the body until they exit into the end-to-end through holes with the formation of diamond segments.

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