Solid material destruction tool

FIELD: mining.

SUBSTANCE: tool includes a housing and a hard-alloy insert that is fixed on the housing. The insert includes a head part, an intermediate part, a base and a shank. Intermediate part of the insert, and/or its base represent a stepped pyramid-shaped body, the stages of which are made in the form of regular right-angle prisms and/or prismatoids.

EFFECT: optimisation of geometrical parameters of a hard-alloy insert.

10 cl, 8 dwg

 

The invention relates to mining and construction, in particular, to cutting tools for machines used to fracture rocks and artificial surfaces.

A well-known tool for destruction of solid materials containing fixed in the socket of the working head of the carbide insert. The insert includes a head tapering to the top and a circular-shaped housing. Forming a side surface of the head carbide insert has the shape of a circular arc. the center of which is located at the intersection of the normal to the tangent to the arc of a circle at the apex of the angle of taper of the head insert and the base of the housing insert. The beginning of the circular arc forming the side surface of the head insert, is located at the apex of the angle of taper of the head carbide inserts (see p. the Russian Federation No. 2018659 on CL AS 25/38, AS 35/18 Appl. 11.09.91, publ. 30.08.94 "Cutter mining machine for crushing of mainly hard rock").

The disadvantage of this tool is the low efficiency of its work. due to the fact that the destruction of the material is only the pointed head of the insert, which are subject to wear and zatupleniju.

Also known instrument for destruction of solid materials, comprising a housing and carbide insert, fixed to the body and contains the head and temporarily the s part, the base and the shaft for placement in the socket housing, the base of the insert has the shape of a cylinder, the longitudinal axis of which is PA to the longitudinal axis of the insert. The head of the insert is formed by a body of rotation with the outer side surface of a convex shape. The intermediate portion of the insert is formed by a body of rotation with the outer side surfaces of the concave shape. Side surface of the head part of the insert smoothly paired with a side surface of the intermediate portion of the insert. The length of the intermediate portion of the insert along its longitudinal axis does not exceed the length of the head portion of the insert on the same axis (see p. the Russian Federation No. 2052099 on CL AS 35/18, E02F 9/28 Saul, publ. 10.01.96 "Tool for breaking hard material").

The intermediate part of the carbide insert in the form of rotation of a body with a concave outer side surface is more optimal consumption carbide material as compared with the above tool, whose outer lateral surface of the carbide insert is convex. However, in this instrument the destruction of the material is also centrally located head part is inserted. It has a minimum radius of curvature of the surface and, therefore, creates the maximum load in the material, leading to its destruction. The intermediate portion of the insert and its base is made with a smooth outer surface and therefore do not participate in the destruction of the material. This reduces the efficiency of the process of destruction of the material and leads to rapid wear of the tool as a whole.

The present invention is to increase the efficiency of destruction of material while ensuring high wear resistance.

The technical result obtained by the invention is to optimize the geometric parameters of the carbide insert.

This problem is solved due to the fact that in the known tool for destruction of solid materials, including building and carbide insert, which is fixed on the housing and includes a head portion, an intermediate portion, the base and the shaft for placement in the socket housing, according to the invention, the intermediate portion of the insert and/or its base are stepped pyramidal body, the steps which are executed in the form of regular direct prisms and/or prismatoid.

Prismatic stage pyramidal body can be located relative to each other by rotation around the longitudinal axis of the insert.

The angle of rotation of the adjacent faces of prismatic steps of the pyramid of the body relative to each other may be not less than 5°.

Each of the prismatic steps of the pyramid of the body may be made so that the sharp edges of edges of a polyhedron p is topline.

The length of the body of the tool, counting from the base of the insert to the fist of the working body rock cutting machine, can be at least 0.1 of the total length of the head part, intermediate part and the base of the insert.

The dimensions of the cross section of the base insert may exceed the dimensions of the cross section of the shank body.

The insert may have a slot to accommodate the protrusion of the housing and the bottom of the slot can be made with the tab inside the socket, intended for placement in the deep part of the body, and the height of the protrusion into the slot is not less than 0.5 mm.

The shank of the insert may be made in the form having radial grooves and/or channels of the annular element, the longitudinal axis of which is located on the longitudinal axis of the insert,

On a supporting surface of the base insert, intended to interact with the surface of the housing on the supporting surface of the shank, which is designed for engagement with the bottom of the socket casing, on the bottom of the socket insert, the projection made at the bottom of the socket insert can be auxiliary protrusions with a height of 0.03-0.5 mm

Research conducted on the sources of patent and scientific and technical information, showed that the proposed tool is unknown and should not be explicitly studied the prior art, i.e. meets the criteria Novi is on and inventive step.

The tool can be made in any enterprise, specializing in this industry, because it requires known materials and standard equipment, and is widely used for crushing of hard rocks and is industrially applicable.

Performed in the present form of the instrument affects the array of destructible material at the same time as the centrally located head part of the insert, and sharp cutting protrusions are evenly distributed throughout the outer surface of the intermediate portion of the insert and its Foundation. Obviously, the introduction of destructible material tool with numerous sharp cutting edges require less power than the introduction of a tool (prototype), with only the head of the pointed shape. This allows you to increase the cutting speed and, consequently, the performance of the instrument. Increases productivity and greater, compared with the prototype, the size of the zone of destruction arising from the impact tool. In addition, such simultaneous impact of multiple cutting protrusions creates a whole array of destructible material stress, leading to the formation of microcracks, which facilitates the introduction of the tool into the material and reduces its wear. The specific geometrical parameters of the firmness of dopravni inserts are selected depending on the properties of the fractured material. So for destruction of solid rocks can be used carbide insert, the intermediate part and the base made in the form of a stepped pyramidal body of complex shape. The geometrical parameters of this insert is such that its side surface, there are many cutting edges used for cutting erodible solid material. The intersection of numerous planes of the insert forms a strong, in particular, rectangular and/or obtuse-angled wedges evenly distributed on the outer surface of the insert. The length of the head portion of the insert, the intermediate portion of the insert and the base are chosen empirically depending on the properties of the fractured material. When small amount of carbide material such form insert ensures high durability by minimizing the likelihood of chipping and chipping of the hard alloy, and also due to the uniformity of wear of the entire outer surface of the insert, as its head part and the intermediate part and the base. The specified limit for the angle of the faces of the adjacent prismatic steps of the pyramid of the body relative to each other, which should not be less than 5°, caused by the following. At an angle less than 5°, the cutting edges on the surface of the carbide inserts are so small that few in the iyayut destruction efficiency cutting of the material. In addition, the insert with an angle less than 5° reduces the adaptability of its manufacture.

The durability of the tool as a whole also depends on the strength and durability of the hull below the base of the carbide insert. Studies have shown that the length of the body of the tool should be as minimal as possible. It was empirically established that the most suitable to provide the necessary strength and durability of the tool as a whole so that the length of the body of the tool along its longitudinal axis coincident with the longitudinal axis of the carbide insert, was not less than 0.1 of the total length along the longitudinal axis of the head part, intermediate part and the base of the insert, i.e. insertion length without shank. Also it was empirically established that in order to eliminate the risk of loss of carbide inserts of the tool body and the loss of housing of the working body of the rock breaking machine, the dimensions of the cross section of the base of the insert should be close to the dimensions of the head part of the housing and exceed the dimensions of the cross-section of the shank body. For example, when the base of the insert and the tool body is cylindrical, the diameter of the base of the insert to the shank diameter of the casing shall be not less than 1,05. This provides the necessary durability the durability of the hull below the base of the carbide insert.

Use the tool carbide insert with multiple cutting edges causes in some cases, the need and strengthen the means of holding the insert in the housing. This can be achieved by increasing the contact area between the insert and the housing. The insert can be made with an internal socket and, if necessary, and with the additional ledge inside the nest. I.e. insert may come in contact with the body not only through its shank, but also due to the introduction of the protrusion of the housing in the socket insert. The insert Jack allows you to achieve uniform load distribution in the volume of the body insert and the housing.

The strength and wear resistance of the tool in General important an influence as secure carbide inserts on the body. To ensure uniform brazed seam on all surfaces of the carbide inserts that are intended to interact with corresponding surfaces of the body made a small auxiliary protrusions. These tabs allow you to get out through the grooves and/or channels in the shank carbide insert formed when carrying out soldering gas. This significantly reduces the likelihood of formation of sites, where the solder joint is not formed or is defective.

Thus, the claimed tool for the ruin is of solid materials by optimizing the geometrical parameters of carbide inserts increases the efficiency of destruction of material while ensuring high wear resistance.

The claimed technical solution is illustrated by drawings:

Figure 1. General view of the cemented carbide insert of the proposed tool with an intermediate part of the insert, made in the form of a stepped pyramidal body, prismatic stages which are located relative to each other by rotation around the longitudinal axis of the insert.

Fig. 2. Top view of the carbide insert, shown in figure 1.

Figure 3. The section on the carbide insert is shown in figure 1.

Figure 4. Bottom view of the carbide insert, shown in figure 1 and figure 4.

Figure 5. Tool for destruction of solid materials, enshrined in the fist of the working body rock cutting machine.

Tool for destruction of solid materials according to the present invention, includes a housing 1 and a carbide insert that is fixed on the housing 1 and includes a head portion 2, the intermediate part 3, base 4 and kostovic for placement in the socket housing 1. The intermediate part 3 of the insert and/or the base 4 is made with cutting projections on the outer surface. The intermediate part 3 of the insert and/or the base 4 are stepped pyramidal body, level 6 which is made from prismatic. Prismatic stage 6 can be represented as a polyhedron, such as a prism at the base of which lie the triangle, or four is a square, or the Pentagon, or a hexagon, etc., These prisms may be correct - with bases in the form of a regular n-squares, or wrong - with bases in the form of an irregular n-squares. Prisms can be direct or indirect. As a level 6 can act and prismatoid, i.e. a polyhedron whose two faces (bases) lie in parallel planes, and the rest are trapezoids or triangles with bases a common side or the top. Prismatic stage 6 pyramidal body can be located relative to each other by rotation around the longitudinal axis of the insert. The specific choice of the form of steps 6, forming the intermediate portion 3 of the insertion depends on the conditions of application of the tool for breaking hard material. Sharp edges of the ribs steps 6, forming the intermediate part 3 of the insert can be blunted or by performing chamfer or a rounding, for example with a radius of 0.5 mm

Length (in the drawing is designated as L1the body 1 of the tool, starting from the base 4 of the insert to the fist 7 working body of the rock breaking machine, is 0.1 to 0.9 total length (in the drawing is designated as L2) the head part 2, the intermediate part 3 and the base 4 is inserted. Base diameter 4 inserts (in the drawing is designated as D2) exceeds the diameter of the shank 12 (on which Artie designated as D 1) of the housing 1.

The insert may have a socket 8 for accommodating the protrusion 13 of the housing 1 and the bottom of the slot 8 can be performed with the projection 9 into the socket 8, intended for placement in the corresponding depth of the housing 1. The height of the protrusion 9 may be at least 0.5 mm and is selected depending on the current need of increasing the contact area of the carbide insert and the housing 1.

The shank 5 of the insert may be made in the form having radial grooves 10 and/or channels of the annular element, the longitudinal axis of which is located on the longitudinal axis of the insert. On the supporting surface 4 of the insert intended for interaction with the surface of the housing 1; the support surface of the shank 5, which is designed for engagement with the bottom of the socket body 1; at the bottom of the slot 8 inserts, on the ledge 9, is made on the bottom of the slot 8 of the insert; are supporting protrusions 11 height 0,03-0,5 mm

Tool for destruction of solid materials is as follows. Carbide insert, fixed to the body 1 of the tool interacts with the destructible material. While on the surface of the erodible material is formed furrow (camber)and the particles are destroyed material are supplied into the gaps between the cutting edges of the pyramidal stepped body or grooves on the surface of the bodies of the cylindrical rungs of the intermediate portion of the insert and without clogging insert pressed the debris is removed from it. The optimal geometric parameters of the insert with multiple cutting edges on the entire surface of the intermediate part inserts provide high efficiency in the destruction of the material, and allow the insertion of a longer time to maintain high cutting properties without chips and defects of hard alloy. The optimal size ratio of the cross-section of the tool body and the base of the insert, as well as the length of the tool body and the length of the insert prevents the body from premature wear-abrasion and secure the insert in the housing protects it from breaking from the housing and the housing of the working body of the rock breaking machine.

Thus, the claimed tool for destruction of solid materials by optimizing the geometrical parameters of carbide inserts increases the efficiency of destruction of material while ensuring high wear resistance.

1. Tool for destruction of solid materials, including building and carbide insert, which is fixed on the housing and includes a head portion, an intermediate portion, the base and the shaft for placement in the socket housing, wherein the intermediate portion of the insert and/or its base are stepped pyramidal body, the steps of which are performed in VI is e correct direct prisms and/or prismatoid.

2. The tool according to claim 1, characterized in that the prismatic stage pyramidal body are located in relation to each other by rotation around the longitudinal axis of the insert.

3. The tool according to claim 2, characterized in that the angle of rotation of the adjacent faces of prismatic steps of the pyramid of the body relative to each other is not less than 5°.

4. The tool according to claim 1, wherein each of the prismatic steps pyramidal body is made so that the sharp edges of edges of the polyhedron blunt.

5. The tool according to claim 1, characterized in that the length of the body of the instrument, counting from the base of the insert to the fist of the working body rock cutting machine, is not less than 0.1 of the total length of the head part, intermediate part and the base of the insert.

6. The tool according to claim 1, characterized in that the dimensions of the cross section of the base of the insert exceeds the dimensions of the cross section of the shank body.

7. The tool according to claim 1, characterized in that the insert has a slot to accommodate the protrusion of the housing.

8. The tool according to claim 7, characterized in that the bottom of the nest is made with the tab inside the socket, intended for placement in the deep part of the body, and the height of the protrusion is at least 0.5 mm.

9. The tool according to claim 1, characterized in that the shank of the insert is made in the form having a radial groove and/or channels of the annular element, the longitudinal axis of which is located on the longitudinal axis of the insert,

10. Instrument according to any one of claims 1, 7, 9, characterized in that the supporting surface of the base insert, intended to interact with the surface of the housing on the supporting surface of the shank, which is designed for engagement with the bottom of the socket casing, on the bottom of the socket insert, the projection made at the bottom of the socket insert, are supporting protrusions with a height of 0.03-0.5 mm



 

Same patents:

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FIELD: construction.

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FIELD: mining.

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Shank-type cutter // 2446283

FIELD: mining.

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EFFECT: reducing the costs for elements at optimised wear.

12 cl, 4 dwg

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Tail drilling bit // 2434999

FIELD: mining.

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3 dwg

FIELD: construction.

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30 cl, 5 dwg

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FIELD: mining.

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8 cl, 4 dwg

FIELD: mining engineering.

SUBSTANCE: invention relates to mining industry, particularly the cutting tools of mining machines serving to disintegrate coal and other mine rocks. The cutting tool for disintegration of coal and other mine rocks consists of a tool holder with a lengthwise passage for water supply and a cutting tool cartridge as a core with through microcanals connecting the surface of the cutting tool cartridge working part with the lengthwise passage of the tool holder. Outlet holes of the microcanals on the surface of the cutting tool cartridge are made as contour rows positioned throughout the entire length of the working surface forming a cone. This structure increases the distance between the rows of the outlet holes as it gets further away from the top of the core, and the density of distribution of the microcanal external holes on the working surface of the cutting tool cartridge rises toward the top of the core.

EFFECT: extended life of a cutting tool and decreased wear of the cutting tool cartridge.

1 dwg

Tool holder. // 2347907

FIELD: mining..

SUBSTANCE: invention refers to mining and building, particularly to machines with pulvimixer. A tool holder for a machine with the pulvimixer or such like has base (10) which bears holding added piece (30), also added piece (30) has receiving seat (31) of the cutting tool; and lug (15) is attached to base (10) before holding added piece (30) in the direction of tool holder feeding. Base (10) has connecting section (20) made in form of a chip breaker; the connecting section is formed on base (10) and passes at least partially through lug (15) starting from holding added piece (30). End section (34) of holding added piece (30) has intake seat (31) of the cutting tool made in form of an aperture. Also end section (34) has circular contact surface (33) passing around medium lengthwise axis of intake seat (31) of the cutting tool. Contact surface (33) which is located radially outside passes up to dimension boundaries of a cylinder region of end section (34). Connecting section (20) returning in the direction of the axis relative to contact surface (33) is connected with holding added piece (30).

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FIELD: mining.

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EFFECT: increased safety at mining operations due to reduced probability of generating igniting spark when cutter touches surface of rock in mining works hazardous for gas and dust, also increased wear resistance of cutter tail piece.

27 cl, 4 dwg

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