Cutter for mining machines

FIELD: mining.

SUBSTANCE: cutter for mining machines comprises a holder with an axial conical channel, where a tail is fixed of a cutting tip formed by two closed symmetrically arranged fixators with a conical working part and spherical seats at contacting surfaces for hard-alloy elements, the diameter of which increases in direction from the top towards the tail. The cutter is equipped with an additional holder in the form of a conical rod rigidly connected to a tail of the cutting tip, and hard-alloy elements and fixators are arranged with axial through conical channels, where the additional holder is installed. The additional holder may be made of a material with lower hardness and higher tensile strength compared to appropriate parameters of hard-alloy elements.

EFFECT: reduced hard alloy consumption, higher efficiency of cutter operation, increased tunnelling and speed of rock breaking.

2 cl, 2 dwg

 

The invention relates to the mining industry, namely the rock cutting tool the tool used to equip the Executive bodies of excavation and tunneling machines.

Known cutter for mining machines, containing a cylindrical shank with an axial conical bore for the shank of the cutting tip with carbide element (see U.S. patent No. 3342532, CL 299-92, 1967).

The disadvantages of the known cutter should be attributed to the relatively low resistance and a large amount of solid alloy.

Closest to the proposed to the technical essence and the achieved result is a cutter for mining machines comprising a shank with an axial tapered channel, which is fixed to the shank of the cutting tip formed by two closed symmetrically arranged latches with conical working part and a spherical nests on the contacting surfaces under the carbide of the elements of the response form, the diameter of which increases in the direction from the top to the shank (see ed. St. USSR №1420153, CL IS 25/38, 1988).

The disadvantage of this cutter is a significant consumption of expensive carbide material, because after wear of the spherical carbide of the elements on the quantity of its radius under the action of dynamic loads they fall from spherical nests. Other deficiencies the om cutter is the probability of getting drawn residues carbide elements under other carbide elements and their withdrawal from the system, that significantly reduces both the speed and the driving of the Executive bodies of mining machines.

In connection with the stated technical result of the invention is to reduce the amount of solid alloy and increase the efficiency of the cutter by increasing the penetration and speed of destruction of rocks by reducing the probability of residues cutters under new cutters and reduction of the amount of precipitated residue waste incisors.

This technical result is achieved in that the cutter for mining machines comprising a shank with a tapered axial channel, which is fixed to the shank of the cutting tip formed by two closed symmetrically arranged latches with conical working part and a spherical nests on the contacting surfaces under the carbide of the elements of the response form, the diameter of which increases in the direction from the top to the shank, according to the invention is provided with an additional holder in the form of a tapered rod, oriented large base towards the top of the cutting tip and connected to its shank and carbide elements and tabs provided with axial through-conical channels, oriented along the axis of the cutting tool, additional holder is placed in a co-channel cell battery (included) carbide is tov and retainers.

The achievement of the technical result is also that extra holder is made from a material with a lower hardness and higher tensile strength than the corresponding parameters of carbide elements.

The invention is illustrated by drawings, where figure 1 shows a General view of the cutter in a longitudinal section; figure 2 is a section a-a in figure 1.

The cutter consists of a shank 1, a tapered axial channel 2 which is mounted a cutting tip 3 with the tapered shank 4. The cutting tip 3 is made of two symmetrical latches 5 and 6 with conical working part 7 and the spherical sockets 8 on the contacting surfaces, the United axial tapered channel 12. Slots 8 are designed to accommodate carbide elements 9, the diameter of which increases in the direction from the top to the shank. All carbide elements 9 is made with a through axial tapered channels 10, which are oriented along the axis of the cutting tip 3. The channels 10 and 12 serve to accommodate additional holder 11 made in the form of a tapered rod, which is rigidly connected to tapered shank 4 by any known method, for example by soldering, a nut with a cotter pin 13, etc. At the same time, the holder 11 is made of a material with a lower hardness than that of the carbide elements 9, but with bolivianos tensile strength, for example, from a material based on microplastics.

The principle of operation of the cutter is as follows. In the fracture process of rock cutting tip 3 wear carbide retaining elements 9 clamps 5 and 6 and additional holder 11 is substantially faster than the wear of carbide elements 9. The result is the gradual exposure of the carbide elements 9, which are destroying the breed. When the wear of carbide elements 9 by an amount less than its radius, they are held by clamps 5 and 6, and additional holder 11, and when worn on the greater value they held only an additional holder 11, which due to its conical surface eliminates the probability of carbide elements 9 of the clamps 5 and 6. After wear of the lower carbide element 9 is rapid wear additional holder 11, which is provided by running it from a less wear-resistant material. Thanks to this performance cutter is provided the use of carbide elements 9 until they wear.

All of this can significantly reduce the amount of solid alloy and to improve the efficiency of the cutter by increasing the penetration and the mechanical speed of destruction of rocks by eliminating the probability of fragments of worn incisors under other the cutters.

1. Cutter for mining machines comprising a shank with a tapered axial channel, which is fixed to the shank of the cutting tip formed by two closed symmetrically arranged latches with conical working part and a spherical nests on the contacting surfaces under the carbide of the elements of the response form, the diameter of which increases in the direction from the top to the shank, characterized in that it is provided with an additional holder in the form of a tapered rod, oriented large base towards the top of the cutting tip and connected to its shank and carbide elements and tabs provided with axial through-conical channels, oriented along the axis of the cutting tool in the holder posted in combined channels carbide elements and retainers.

2. Cutter for mining machines according to claim 1, characterized in that the additional holder is made from a material with a lower hardness and higher tensile strength than the corresponding parameters of carbide elements.



 

Same patents:

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FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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8 cl, 6 dwg

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EFFECT: simplified installation of clamping cartridge on round tail of cutter.

11 cl, 4 dwg

FIELD: mining.

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EFFECT: increased operation life of cutter due to increased reliability of fastening.

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EFFECT: increased resource of mine cutting tool and reduced power consumption for cutting.

6 dwg

FIELD: mining.

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EFFECT: pliancy of cutting part along and perpendicularly to axis of cutter, increased strength of hard-alloy reinforcement in case of impact loads, increased efficiency of rock-breaking mining machines.

5 dwg

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