Cutter for driving and cleaning and cutting machines (versions)

FIELD: mining.

SUBSTANCE: cutter for driving and cleaning and cutting machines comprises a holder with a shank, a reinforcing hard-alloy insert having front and rear faces of sharpening, a cutting edge having a semi-circular convex shape. According to the first embodiment, the front face of sharpening of the reinforcing hard-alloy insert is made of semicircular convex shape, and the rear face - of plane-concave shape. According to the second embodiment, the front and rear faces of sharpening of the reinforcing hard-alloy are made of semicircular biconvex shape.

EFFECT: increasing productivity of the working bodies of driving and cleaning and cutting machines, reduced wear of the reinforcing hard-alloy insert of the cutters.

5 cl, 10 dwg

 

The group of inventions related to the mining industry, namely the rock cutting tool the tool used to equip the Executive bodies of the tunnel-treatment and excavation machines.

Known cutter for mining machines PC-14 (D)containing a shank, a head on the end surface of which is equipped with carbide insert (http://www.kopemash.ru/products/12/108 .html).

The disadvantages of this cutter should include short life of the cutter and a large output of fines ore during the mining of mineral, as it is irrational to form the front, the rear face and the cutting edge reinforcing carbide insert.

The closest to the invention is a cutter for mining machines RS-35, containing a holder with a reinforcing carbide insert lenticular shape (the Study of the performance of cutting tool potassium harvesters / A.I Brusilovsky, V. Mezentsev, ALEXANDER Afanasiev, etc. // increase the efficiency of technological processes in mining potash mines. - Sat. the scientific. works. - VNIIG. - L., 1980. - S.89-93).

The disadvantages of this cutter should be attributed to the increase in energy consumption for destruction of the array of rocks due to intense growth areas of dullness on the rear face of the reinforcing carbide insert cutter in the optimization process.

The technical result is that the invention is to increase the service life of the cutter and the reduction of energy consumption in the destruction of the array of rocks by the Executive body of the harvester by reducing wear reinforcing carbide insert cutter.

This technical result according to the first embodiment is achieved by the fact that the cutter for tunnel-treatment and extraction combines containing a holder with shank, carbide reinforcing insert having front and rear faces of the grinding, cutting edge, the front edge sharpening carbide reinforcing insert is made semi-circular convex shape, and the rear face is-concave shape, with the cutting edge has a semi-circular convex shape.

This technical result according to the second variant is achieved by the fact that the cutter for tunnel-treatment and extraction combines containing a holder with shank, carbide reinforcing insert having front and rear faces of the grinding, cutting edge, the front and rear face of the sharpening carbide reinforcing insert is made semi-circular biconvex shape, with the cutting edge has a semi-circular convex shape.

Front angle sharpening reinforcing carbide insert cutter is 15-25°, clearance angle - 10-12°, the angle of taper - 45-60°, and the width of the cutting edge - 12-15 mm. angle cutting carbide reinforcing insert is directly proportional to the amount of the rear edge angle and angle of taper.

The invention is illustrated by drawings, where figure 1 shows the cutter in the first embodiment, mounted in a tool holder doers is the main body of the harvester; figure 2 shows the cutter according to the second variant, mounted in a tool holder of the Executive body of the harvester; figure 3 - General view of the cutter in the first embodiment; figure 4 is a section along a-A; figure 5 - scheme of the corners of sharpening reinforcing carbide insert cutter in the first embodiment (in Cartesian coordinates); figure 6 - General view of the cutter according to the second variant; 7 - section B-B; on Fig diagram of the corners of sharpening reinforcing carbide insert cutter for the second variant (in Cartesian coordinates); figure 9 - wear reinforcing carbide inserts cutter in the first embodiment; figure 10 - wear reinforcing carbide insert cutter for the second option.

In the drawings denote: 1 - reinforcing carbide insert; 2 - holder; 3 - rock massif; 4 - the shank of the tool holder; 5 - tool holder; 6 - the Executive body of the harvester; 7 - concentration core of finely shattered rocks of the massif; 8 - parallel to the plane of the shank; 9 is a cylindrical hole of the tool holder; 10 - front face reinforcing carbide insert cutter; 11 - back face reinforcing carbide insert cutter; 12 - the cutting edge reinforcing carbide insert cutter; 13 - Playground break; 14 - wear reinforcing carbide insert cutter.

These cutters are designed for tunnel-treatment harvesters working in layers is agqoy and medium strength.

The cutters consist of a holder 2 and a reinforcing carbide insert 1 of the wear-resistant material (Fig.1-10).

The shank of the tool holder 4 has a pan slot shape, the taper is 1:10, that allows you to securely fix it without additional fastening elements in the tool holder 5, which is the Executive body of the harvester 6 (1-4, 6).

Parallel to the plane of the shank 8 is designed to prevent reversal of the cutter in the holder 5 (Fig 1, 2, 4, 6, 7).

Reinforcing carbide insert 1 is placed in the cylindrical hole of the tool holder 9 by using, for example, solder joints (Figure 4, 7).

Reinforcing carbide insert cutters on the first and second options has the following values of angles of sharpening: rake angle α is 15°-25°, clearance angle β is 10°-12°, the angle of taper of γ - 45°-60°. The width of the cutting part of the cutter reinforcing carbide insert cutter f is 12-15 mm (3, 5, 6, 8).

In the first embodiment, the shape of the front face reinforcing carbide insert cutter 10 is made semi-circular convex shape of the rear face 11 - - concave, the shape of the cutting edge carbide reinforcing insert 12 has a semicircular convex shape (Fig 3, 4, 5).

According to the second variant form of the front face reinforcing carbide insert cutter 10 is made semi-circular, biconvex, form C is days verge 11 - semi-circular, biconvex, and the shape of the cutting edge 12 has a semicircular convex shape (6, 7, 8).

Angle of sharpening reinforcing carbide insert cutter and its forms mentioned above are obtained experimentally. When these angles (within) sharpening and appropriate forms of reinforcing carbide insert cutter decrease the wear of the incisor teeth and the energy consumption for the destruction of the array of rocks.

The principle of operation of the cutters is as follows.

In the fracture process of rock rock 3 reinforcing carbide insert cutter 1 under the action of forces Pzand supply of Pyapplied to the cutter by the Executive body of the harvester 6, the front face of the reinforcing carbide insert cutter is formed sealed the core of finely destroyed breed array 7. As a result of pressure on the rock massif 3 transferred to the surface of the core 7 and the reinforcing carbide insert 1 facing the outcrop destructible array separates the elements of the breed from the array (1, 2).

Due to the abrasiveness of rocks gradually wear reinforcing carbide insert cutter 14, namely, the wear of the cutting edge reinforcing carbide inserts its rear face, and education on the rear face of the pad break 13 (Fig.9, 10).

A rational understanding of the traveler geometric shape reinforcing carbide insert cutters offer contributes to the reduction of the cutting angle δ to δ' and δ" in the first and second embodiments, respectively, thereby providing a natural sharpening carbide reinforcing insert (samstock cutter) and the reduction of the cutting forces Pzand supply of Pyapplied to the cutter to fracture rock rock 3 Executive body of the harvester 6. The value of the cutting angle δ reinforcing carbide insert cutter is directly proportional to the amount of the rear edge angle and angle of taper (Figure 1, 2, 9, 10).

The reduction of the applied forces Pzand supply of Pyon the cutter side of the Executive body of the combine, and form the rear face of the cutters form the cutting edge of the carbide insert cutters provide a lower level of education site blunting 13, therefore, increasing the service life of the cutter and the reduction of energy consumption in the destruction of the array of rocks (Figs 1, 2, 5, 8-10).

Application of the proposed cutters can reduce the cost of ongoing evaluation and excavation works by improving the productivity of work of the working bodies of the tunnel-treatment and excavation machines.

1. Cutter for tunnel-treatment and extraction combines containing a holder with shank, carbide reinforcing insert having front and rear faces of the grinding, cutting edge, wherein the front face of the sharpening carbide reinforcing insert the imp is changed to a semi-circular convex form, and the rear face is-concave shape, with the cutting edge has a semi-circular convex shape.

2. Cutter for tunnel-treatment and extraction combines containing a holder with shank, carbide reinforcing insert having front and rear faces of the grinding, cutting edge, characterized in that the front and rear face of the sharpening carbide reinforcing insert is made semi-circular biconvex shape, with the cutting edge has a semi-circular convex shape.

3. The cutter according to claim 1 or 2, characterized in that the cutting angle sharpening carbide reinforcing insert is 15-25°and the clearance angle is equal to 10-12°, while the angle of taper is 45-60°.

4. The cutter according to claim 1 or 2, characterized in that the angle of cut carbide reinforcing insert is directly proportional to the magnitudes of the rear edge angle and angle of taper.

5. The cutter according to claim 1 or 2, characterized in that the width of the cutting edge is equal to 12-15 mm.



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to cutting tools. Particularly, it relates to radial cutter of header, header and method of cutter production. This cutter comprises shank, head and insert. Said shank features out-of-round cross-section. Said head comprises point area remote from shank and lateral surfaces connecting the front and rear surfaces. Insert is arranged at the point front end. Said insert has body made of tungsten carbide and element made of superhard material. The latter extends into said body and fused therewith. At least a part of superhard material element is exposed at insert cutting surface. At least a part of head front surface is made of superhard material and spaced from the element made of superhard material.

EFFECT: better tool characteristics.

22 cl, 34 dwg

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

FIELD: oil and gas industry.

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EFFECT: increasing service life of tool.

13 cl, 4 dwg

FIELD: construction.

SUBSTANCE: pick or earth-moving tool comprises a body, a support surface, comprising a cavity and axially protruding side walls, an insert fixed in the cavity, comprising a tip, a cone-shaped front surface, a side surface and a transition edge at the crossing of front and side surfaces, and a ring arranged radially outside the protruding side walls, made of a more solid material compared to the body. The axial position of the transition edge and the axial position of the axially most front surface of side walls are substantially identical, at the same time the axially most rear surface of the insert is arranged at the axial distance L' from the insert tip, and the axially most front surface of the ring is arranged at the axial distance D' from the insert tip, where 0.5L'≤D'≤0.9L', preferably, 0.5L'≤D'≤0.8L'. The transition edge and the section of the cone-shaped front surface may be arranged inside a ballistic contour formed by the insert tip, the radially most external section of the axially most front surface of side walls and the ring.

EFFECT: invention provides for operation of a tool under heavy conditions, extended service life of a tool, and reduction of tool blunting to the minimum for improved operational characteristics.

13 cl, 7 dwg

FIELD: mining.

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EFFECT: such design of cutter allows increasing its operating efficiency and operating efficiency of an element of a continuous heading or extracting machine as a whole.

2 cl, 2 dwg

FIELD: mining.

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EFFECT: reduction of hard-alloy consumption and increase of cutting tool efficiency by excluding the possibility of worn cutting tools fragments getting under the other cutting tools.

2 cl, 3 dwg

FIELD: mining.

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3 cl, 2 dwg

FIELD: mining.

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EFFECT: reducing hard alloy consumption and improving cutter operating efficiency.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: composite cutter includes holder and replaceable working head with hard-alloy insert, which is arranged on its front part. Cylindrical cavity is made in rear end surface of replaceable working head in order to fix component parts. Replaceable working head has the possibility of free rotation relative to the holder about its longitudinal axis. It is retained against movement along that axis with locking member made in the form of radial projections on side surface of front holder part. Annular groove is provided in the cavity of replaceable head for its free rotation, and the corresponding slots are made for the holder projections to enter that groove. Replaceable working head is retained against falling out, when holder projections coincide with longitudinal slots, with a setting screw. Screw is screwed into threaded hole drilled in side surface of the head and covers one of longitudinal slots.

EFFECT: improving maintainability of the design, which is related to replacement of worn-out working part of the cutter.

2 cl, 3 dwg

Shank-type cutter // 2446283

FIELD: mining.

SUBSTANCE: shank-type cutter with base part includes shank; at that, shank carries the top of cutter made from hard-alloy material, and base part in the zone between shank and cutter top has the receiving section in which the head part is retained. Head part includes circumferential surface for removal of the cut material, which converges in the direction of the cutter top. At that, as per the first version, the head part is retained relative to the base part with possibility of being turned, and surface for removal of the cut material ends in the area of the base part end receiving the cutter top. As per the second version, head part has limit stop (support section) and/or mating surface, which restricts the erection movement of the head part on base part on support surface of the base part. As per the third version, base part has a clamping sleeve in the area of the shank. At that, head part is put on clamping sleeve, and at that, head part retains the clamping sleeve in pre-load position.

EFFECT: reducing the costs for elements at optimised wear.

12 cl, 4 dwg

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EFFECT: reduced labor inputs for device assemblage in the field.

6 cl, 5 dwg

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3 dwg

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6 cl, 9 dwg

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EFFECT: increased wear resistance due to improved cutting edge strength.

3 dwg

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular the construction equipment for processing surfaces of the ground with a milling drum. The construction equipment for processing a surface of the ground by a milling drum, on whose surface is located a large number of blade holders, and in the jack for holding the blades of the blade holders placed with the possibility of replacing the blades, in particular a blade with a round shank, and moreover by means of the device for tool replacement is carried out or blades from blade holders and/or mounts it. The milling drum is supplied with the device for tool replacement, the adjusting device is intended for positioning the milling drum or the blade in relation to at least one adaptation for tool replacement and/or the actuating unit provides the positioning, at least one adaptation for tool replacement relative to the milling device, the actuating unit and/or the adjusting device has a measuring system for determining the position, and moreover the actuating unit and/or the adjusting device are supplied with a digital control device.

EFFECT: simplification in the replacement of blades.

30 cl, 5 dwg

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving and supporting cutter liner limited at the ends with two lateral walls in relation to the operation drawknife direction, a front and a back supporting walls, the latter being higher than the former. One lateral support wall oriented away from breakage face during operation is higher than the front and the other lateral walls and forms a lateral cutter liner support longer than the other lateral support wall.

EFFECT: prolonged work life.

20 cl, 6 dwg

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving cutter liner limited at the ends with two lateral, one front and one back supporting walls forming drawknife cutter support located mainly in the middle part of back supporting wall and descending to the outer areas. End side of the back support wall directed to the mounting pocket features guiding surfaces in the outer areas, the said guiding surfaces descending inside at an angle to the mounting pocket and serving as an auxiliary mounting device for drawknife cutter.

EFFECT: excellent support of inserted cutter and fast and simple cutter mounting.

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).

EFFECT: improved operation of cutting of disk pulvimixer.

9 cl, 3 dwg

FIELD: mining.

SUBSTANCE: disclosed group of inventions refers to mining industry, particularly to rock destruction tool for mining machines used at deposit development. The cutter consists of an elongated tail piece, of a cutting element secured at one end of the tail piece, projected out of it and made out of material of hardness exceeding hardness of the tail piece, and of a composed bushing formed with multitudes of belts secured around the tail piece near the cutting element and directly adjoining each other. Also belts of the bushing are fabricated out of material more hard, than material of the tail piece, the material of belts is less prone to produce an igniting spark, than material of the tail piece during cutting.

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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