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Cutter for driving and cleaning and cutting machines (versions)

Cutter for driving and cleaning and cutting machines (versions)
IPC classes for russian patent Cutter for driving and cleaning and cutting machines (versions) (RU 2530138):
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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.

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.

 

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