Bore bit for rotor boring of cutting type

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

 

The present invention relates to cutting tools used for mining and excavation. The present invention has been developed primarily for use in coal mining, and usually for the development of underground coal deposits. Therefore, it is more convenient to describe the invention in connection with this application, although it will be immediately clear that the invention could be used for any field development and excavation, for which its functioning is appropriate.

Different different by type of equipment and mechanisms can be used for field development and excavation, and usually work on the development of a Deposit or excavation determines the appropriate type of equipment or machinery. The present invention mainly relates to the development of underground coal deposits, and one of the main difficulties associated with the safety of this kind of field development, refers to fires or explosions in the mine. They can occur because of the formation of methane during mining and coal dust (commonly known as mine dust that can accumulate in the mine and are highly flammable. The disadvantage is that used coal mining equipment can produce vosplamenenii the spark and thus cause a fire or explosion. It is therefore important that all appropriate measures have been taken to reduce or avoid sparking.

Equipment used for gathering or extraction of solid ground, may include a rotary cutting tool in which a rotating drum, carrying many of the speakers cutting bits or percussion instruments, is put in contact with a ground surface. Percussion tools or cutters cut into the surface of the ground, rotating the drum to cause the ground to kick and beat off or separate piece of soil from the surface. This sharp contact between the incisors and the surface of the soil may cause a spark between them.

Cutters are used for the above purpose, generally have carbide cutting tools tungsten carbide, which is usually attached by soldering, hard soldering to a steel shank. Cutters of this type are disclosed in several references from prior art, such as U.S. patent No. 6113195, EP 0274645 and DE 4226976. Elements of cutters can be plug-in type or a type nozzles.

Plug-in type disclosed in DE4226976, in which the greater part of the axial length of the cutting element is mounted in the channel of the shank, and the other part is from him. The cutting element of the type nozzles disclosed in EP 0274645, in which the element has a broader basis than the plug element t is a, and this base is located and soldered with hard solder in a relatively small groove in the front end of the shank. The present invention is suitable to both of these forms cutter.

The cutters of the above-mentioned species, sparks can be created between the head of the tungsten carbide and the surface of the soil, as well as between the steel shank and the surface of the soil, although the occurrence of sparks between the shank and the soil surface is more likely.

The aim of the present invention is to provide a cutter which has a reduced probability of creating a spark during the development of deposits or excavation, especially in the development of underground coal deposits.

In accordance with the present invention results from the cutter, containing:

the elongated shank;

a cutting element mounted on one end of the shank, protruding from it and made of a material harder than the material of the shank; and

composite sleeve formed by the set of annular bands of the sleeve, which is attached around the shank near the head and immediately adjacent to each other, the belts sleeve made of a material harder than the material of the shank, and are less than that of the material of the shank, the tendency to form flammable sparks when cutting.

This is completed with the invention, in addition, is a cutter, containing

extended steel shank;

a cutting element mounted on the cylindrical end section of the shank extending from this end of the axis relative to the longitudinal axis of the shank and is made of a material harder than the material of the shank; and

composite sleeve formed by the set of annular bands of the sleeve, which is attached around the cylindrical end section, pressed in the longitudinal direction, and which essentially extend the full height of this section, made of a material which is more rigid than the material of the shank, and which has a lower tendency to form flammable sparks when cutting than steel shank.

The present invention also provides a method of use of the cutter in the development field, and the cutter includes an elongated shank; a cutting element mounted on one end of the shank, protruding from it and made of a material harder than the material of the shank; and

composite sleeve formed by the set of annular bands of the sleeve, which is attached around the shank near the cutting element and immediately adjacent to each other, the belts sleeve made of a material harder than the material of the shank, there is tons more low, than the material of the shank, the tendency to form flammable sparks during cutting, the method includes the stage of development of the field in the environment containing the gas and/or coal mine dust.

The present invention additionally provides a method of use of the cutter to develop the deposits, and the cutter includes:

extended steel shank;

a cutting element mounted on the cylindrical end section of the shank extending from this end of the axis relative to the longitudinal axis of the shank and is made of a material more rigid than the material of the shank; and

composite sleeve formed by the set of annular bands of the sleeve, which is attached around the cylindrical end section, pressed in the longitudinal direction, and which essentially pass through the entire height of this section and made of a material that is more rigid than the material of the shank, and which has a lower tendency to form flammable sparks during cutting, steel shank, the method includes the stage of development of the field in the environment containing the gas and/or coal mine dust.

Still additionally, the present invention is a cutter containing:

the elongated shank;

a cutting element mounted on one end of the shank, the protrusion is in store from him, and made from a material more rigid, than the material of the shank; and an elongated shank includes a cylindrical section having a first end adjacent to the cutting element, and a second end spaced longitudinally from the cutting element and ending with the flange;

an annular sleeve, which is attached around the cylindrical section of the shank, this ring sleeve rests one axial end of the flange, and the opposite axial end goes to the first end of the cylindrical section, but ends before it, so that the cylindrical part of the cylindrical section remains open from the outside, this sleeve is made from a material that is more rigid than the material of the shank, and which has a lower tendency to form flammable sparks when cutting than the material of the shank.

In addition, the present invention provides a method of use of the cutter in the development field, with the cutter contains:

the elongated shank;

a cutting element mounted on one end of the shank, protruding from it and made of a material harder than the material of the shank; and an elongated shank containing a cylindrical section having a first end adjacent to the cutting element, and a second end spaced longitudinally from the cutting element and engaged is audica flange;

an annular sleeve, which is attached around the cylindrical section of the shank, this ring sleeve rests one axial end of the flange, and the other axial end goes to the first end of the cylindrical section, but ends before it, so that the cylindrical part of the cylindrical section remains open from the outside, and a sleeve made of a material harder than the material of the shank, and has less tendency to form flammable sparks when cutting than the shank, the method includes the stage of development of the field in the environment containing the gas and/or coal mine dust.

Due to the attachment of the sleeve around the shank portion of the shank in the immediate vicinity of the cutting element, which usually has the highest probability of contact with a ground surface to be cut, or pieces of ground, separated from its surface, and, therefore, create an igniting spark, then this part of the bit protected from such contact resistant to the creation of sparks material. The possibility of formation of sparks, consequently, decreases.

In the cutter according to the invention, an elongated shank may take any desired form, such as the well-known form, for installation of rotary cutting drum. The fastening shank to the drum is usually done ashamnu, so worn cutters can be replaced if necessary, and in some mountain equipment shank is mounted for rotation, so that the cutter can rotate freely around its longitudinal axis when in contact with a ground surface. Shank, generally, is preferably made of steel.

In the cutter according to the invention the shank may be attached to the form for installation or cutting element removable type or cutting-type element of the nozzle.

In the cutter according to the invention, the cutting element may be made of any suitable material which is harder than the material of the shank, and the preferred material of the cutting element is a cemented carbide with tungsten carbide as a main component. The cutting element may also be reinforced with diamonds to enhance hardness, or may contain cubic boron nitride for the same purpose. The cutting element may have any suitable shape, which usually depends on whether the element is inserted or Packed type. The cutting element is usually soldered with hard solder to the shank, although there may be used other methods for fastening element, such as a chemical binder.

The sleeve, which is attached around the shank adjacent to the cutting element, preferably izgotavlivatsya the same material, as the cutting element, and preferably, the material was solid alloy with tungsten carbide as a main component. Alternatively, this material could be or include SiC, Al2O3, TiN, SiC-D (a composite material of an alloy of silicone carbide with diamonds), cubic boron nitride, tool steel or other similar materials. These materials may be formed as a composite material with other suitable materials or they can be made as an outer layer or layers on top of a suitable framework.

At normal size of the cutter, the longitudinal height of the sleeve could be approximately 10-15 mm, with the thickness of the sleeve along the radius between the inner and outer diameter of about 3-5 mm Manufacturer bushing size of the tungsten carbide may present certain difficulties and therefore according to the invention the sleeve may be manufactured as an integral sleeve of bands or rings reduced height of approximately 4 mm axial height. These bands can then be attached to the shank to form a composite sleeve to the desired height. In a preferred arrangement, there are three stub belt, although the two stub belt, or four or more may be used if necessary. In a preferred arrangement, each belt sleeve has the same int nie and outer diameters, and preferably, the inner and outer surfaces are parallel, while the outer surface may include a beveled edge or edges to reduce the likelihood of breakage sharp edges.

Predictable difficulty with the sleeve, made of one piece, refers mainly to the difference in coefficient of linear expansion between the sleeve and the shaft when the sleeve is attached to the shank. If the material of the shank is steel and the bushing material is tungsten carbide, the shank will extend when the steel is heated and then compressed when the steel cools almost two times faster than cool sleeve. The difference in the rate of shrinkage can cause tension in the sleeve, which usually will become more fragile than the shank, and if the voltage is large, the coupling can break. If the shank is a few bands in the form of rings, the contact area between the shank and an integral sleeve may be reduced due to the gaps between the rings. This is because the material used for fastening the ring to the shank, is located between the rings and the shaft and between the rings. This material, which, as described hereinafter, is preferably solid solder can mitigate part of the emerging mechanical stress and therefore reduce the probability of exit is down the sleeve. This has the additional advantage, since the composite sleeve may be stronger or stronger than one-piece sleeve, so the likelihood of wear or failure when workload is also reduced.

In a preferred embodiment of the cutter, in accordance with the invention, the shank flange provided between the generally conical section and a cylindrical section. Conical section passes into the cylindrical section, whereas in the cylindrical section provides a groove for placing the main part of the cutting element. This placement allows you to create a cutter or inserted or Packed type. In this arrangement, the sleeve is attached to the shank around a cylindrical section and rests on the flange. Mostly this arrangement ensures accurate installation of the sleeve on the shank and forms a surface on which the sleeve can absorb shock loads during cutting.

To reduce the likelihood of cracking an annular sleeve when cutting, bushing, which is replaceable with the base of the cutting element may be mounted so that the cylindrical part of the cylindrical section remains open from the outside. It is preferable that the length in the longitudinal direction, on which it remains open, was approximately 1-5 mm, most preferably about mm. The open part, therefore, is relatively small and preferably also that she was in a diameter not greater than the extreme diameter of the cutting element near the base of the cutting element. As only a small part of the cylindrical section is open on the outside, the probability of contact this section with the cutting surface during cutting is very low. More precisely, an open, unprotected part of the section is almost a "shadow" of the cutting element, which is part of the cutter, and has minimal or slight wear due to its close proximity to the cutting element. The wear of the cutter may be more likely to occur in a place located much farther away from the cutting element. The details of the cutter, which are more prone to wear are those parts that have significant contact with the surface of the cutting, and it is precisely those parts that have a high probability to cause a spark when the contact will take place.

Due to the installation of an annular sleeve in a position farther from the cutting element, the sleeve is placed in a less damaging external conditions during operation for cutting relatively shock loads, which could lead to the destruction of the bushing. On the other hand, by mounting the sleeve for overlapping sections of the cutter from substantial contact with p is the surface of the cutting in the cutting process, the tendency to spark formation can be reduced along with the fact that the cylindrical section may also be protected from wear and tear.

In a preferred construction in which the shank is made of steel, and the sleeve or sleeves are made/are manufactured from tungsten carbide, the preferred form of attaching the sleeve to the shank is brazing. In the embodiment, in which the sleeve includes a lot of bands, it is preferable that each of the belt sleeve was separately soldered to the shank and to each other.

Mainly, the seam brazing, which is placed between the stub belts and shank, can take the load, which may occur during heating and cooling of the cutter. During heating and cooling, sleeve bands and the shank expand and shrink, but at different speeds due to the difference in the respective coefficients of expansion. Brazing can also provide a level of shock absorption during the cutting process. It should be noted that the seam for hard soldering is designed for placement between adjacent belts of the sleeve, as well as between the belts of the sleeve and the shank, so that the absorption voltage and shock between adjacent stub belts.

Although tungsten carbide is the preferred material is ohms for the sleeve, other materials, such as those discussed earlier, may be equally suitable. The material may contain additives that enhance or resistance to the formation of flammable sparks, or wear sleeve. In relation to this last, for example, the wear sleeve can be enhanced by the additive of the diamond particles. Other additives discussed earlier species may be equally suitable. Alternatively, the material can be a composite substrate which has a corresponding outer layer or layers, overlaid, and the most preferred is titanium nitride.

It will be understood that the foregoing description mainly concerns the reduction or exclusion of education igniting spark at the contact of the cutter with the surface of the soil. Since this result is the main purpose of the invention, a secondary aspect of the invention is to provide a wear-resistant liner. The shank is made of steel, over time, wear out quickly, and it often happens that the steel shank wears out more quickly than the more solid the cutting element, so that the cutter must be replaced sooner than is desirable, that is, before the cutter becomes worn. In other words, the wear of the shank may reduce the period of active cases who would pick. The wear of the cutter frequently occurs mainly near the immediate neighbourhood of the shank with a cutting element. Accordingly, by appropriately selecting the material of the sleeve, steel shank at such a close distance can be protected from contact with the surface of the soil or debris, otherwise it will lead shank to wear, and then the service life of the cutter will change. The choice of the same material sleeve or almost equivalent to the material of the cutting element may provide for this purpose it is suitable to wear.

The present invention also provides a method of using the cutting element of any of the above types of mining activities in the environment containing the gas and/or coal mine dust.

Other objectives, features and properties of the present invention will become apparent from the following detailed description of the preferred embodiment and the accompanying drawings, by non-limiting examples, all of which form part of the description of the invention, in which similar reference position indicate corresponding parts in the various drawings.

Figure 1 is a side view of the shank of the cutter rotary drilling.

Figure 2 is a side view of the cutting element tungsten carbide for attachment to the shank of figure 1.

Figure 3 is a side view of the cutter with the according to the invention.

4 is a side view of an alternative implementation of the cutter according to the invention.

Figure 1 and 2 respectively show the shank 10 of the tool, and the cutting element 11 tungsten carbide, which gives the configuration for attachment to the shank 10. The shank 10 includes a Cabinet section 12, which has a flange 13 at one end and a groove 14, spaced from the flange 13, and the flange 13 and the groove 14 interact with drum rotary drilling for attaching the cutter to the drum. The manner in which the shank 10 is attached to the drum, a well-known specialist in the art and therefore will not be further described here.

The shank 10, moreover, forms an essentially conical section 15, a cylindrical section 16 and the first flange 17. It will be clear that the first flange 17 is formed by reducing the diameter of the conical section 15 directly adjacent to the cylindrical section 16.

The cylindrical section 16 includes a groove 18 for accommodating the supporting part of the cutting element of this type, as shown in Figure 2. From figure 2 it will be assumed that the cutting element 11 is shown not to scale for attaching to the shank 10, and instead, the element is shown in an enlarged scale to clearly show the important part. The cutting element 11 includes a supporting part 19, which runs to the ring 20 maximum diameter, and it is this supporting part 19 included in the groove 18 x is ostovich 10. The ring 20 rests on the upper edge 21 of the cylindrical section 16 when the cutting element 11 is attached to the cylindrical section 16. This bond is typically accomplished by soldering, hard soldering of the cutting element 11 in the groove 18. Figure 1 shows in broken lines the cutting element 11 mounted on the cylindrical section 16.

From Figure 1 it is seen that when the cutting element 11 is attached to the shank 10, and the outer cylindrical surface 22, the first flange 17 and the outer surface of the cone section 15 remain open. Thus, these surfaces can come into contact with the surface of the cut soil or with a part that is separated from the ground surface. This contact may lead to the formation of flammable sparks, with obviously possible dangerous consequences. The probability of sparking is the largest of the sections of the shank 10 near the cutting element 11, whereas this probability decreases in the direction toward the opposite end of the shank 10.

Figure 3 illustrates a variant embodiment of the invention, in which the probability of sparking is reduced. Cutter with 3 uses the shank 10 and the cutting element 11 with figures 1 and 2 and, therefore, the same reference position, which was used on the drawings, are used in Figure 3.

Figure 3, a composite sleeve 31 formed and the three identical bands or rings 32, located around the outer cylindrical surface 22 (1) of the cylindrical section 16. Each of the rings 32 are performed separately from each other and firmly planted around the cylindrical section 16 or with a small sealing gap, and soldered hard alloy to the outer surface 22, and the most remote from the cutting element 11, the ring 32 is also soldered carbide to the first flange 17. As shown, the ring 32 to provide essentially complete protection for the outer surface 22 of the cylindrical section 16 only a small cylindrical part of the cylindrical section 16, the visible axis for most closely-located ring 32 next to the cutting element 11. This part determines the reference position 33 and is part of the cylindrical section 16, which are attached to the flange 20 of the cutting element 11. A cylindrical part 33 provides some protection for rings 32, especially for the top ring 32, from the impact of fragments of soil, separated during the cutting process, so that the probability of failure of the rings 32 is significantly reduced, especially the upper ring. The axial height of unprotected cylindrical part may be approximately 1 to 5 mm, whereas most preferably, this height was about 3 mm.

The sleeve 31 is made of separate rings, just to facilitate production is VA and attachment to the shank 10. The ring 32 with the dimensions shown in Figure 3, are made of tungsten carbide easier than one composite sleeve which has a size along the axis, equal to the longitudinal dimension of the three adjacent rings. Just separate the solid solder alloy of each ring 32 to the cylindrical section 16 is more durable attachment of the composite sleeve 31 to the shank 10. The use of rings 32 to create a composite sleeve allows you to increase or decrease the height of the sleeve axis relative to the longitudinal size of the cylindrical section 16. That is, there is no need to make the sleeves different axial dimensions, just need to choose the appropriate number of rings 32 to the desired height along the axis of the sleeve.

From Figure 3 it is seen that each of the rings 32 is chamfered, taken on its forward edge on an axis in the direction of the cutting element 11.

Next it will be clear that the length of the sleeve 31 along the axis can be continued in the direction of the flange 13, and for this purpose a conical section 15 of the shank 10 may have ledges to provide an additional number of flanges, or extension sleeve can be simply attached to the outer surface of the conical section 15. The need for the continuation of the protection sleeve to the flange 13 depends on the probability of igniting sparks beyond the first flange 17. This view shows the t, what a significant decrease in educational opportunities igniting spark is achieved through a sleeve 31 or 31', having the approximate dimensions shown in Figure 3 and 4 respectively, relative to the other parts of the cutter 30, 30'.

It will be clear that the correct choice of the material of the sleeve 31, the sleeve 31 will also provide wear protection for the cylindrical section 16 of the shank 10. Although the wear protection is not its (sleeve) the main function mainly this secondary function can significantly increase the service life of the cutter. Moreover, the effect of the invention to reduce sparking can be only when the sleeve remains intact. That is, if the bushing wears out, the advantages of the invention will be lost. Accordingly, it is preferable that the sleeve opposed to wear and tear over the estimated service life of the cutter. As can be seen from figure 4, in an alternative embodiment, the cutter 30, according to the invention, the probability of sparking is reduced. The cutting element 30' Figure 4 uses the Cabinet section 12 of the shank and the cutting element 11 with Figure 3 and, therefore, the same reference position, which was used in the drawings are used in figure 4.

In figure 4, the composite sleeve 31'is formed of three bands or rings 32, 32', is located around a cylindrical over the spines of the first 16 and second 16' of the cylindrical sections. Each of the rings 32, 32' are created separately from each other and mounted around the cylindrical sections 16, 16' with a tight fit or with a small sealing gap and soldered carbide on the outside. Two rings of rings 32, the cylindrical section 16 and the first flange 17 are identical to those that were previously disclosed in figure 3. Most remote from the cutting element 11 ring ring 32 is also soldered with hard solder to the first flange 17. Additional third ring 32' is also soldered with hard solder to the second flange 17'. The dimensions of the cylindrical section 16', the second flange 17' and the ring 32' are larger than the sizes of the respective parts 16, 17 and 32. As shown, the rings 32, 32' provide substantially complete protection for external surfaces of the cylindrical sections 16, 16'. Thus, the shank 10' of the above type forms a second flange 17', which is separated along the axis from the first flange 17 in the other of the cutting element 11 direction, and in this arrangement, the second sleeve 32' is attached around the shank and extends from the first flange 17 to the second flange 17'. In this way, the other part of the shank may be protected from contact with the ground surface, in order to reduce the risk of formation of flammable sparks.

With the above arrangement of the annular sleeve could the and would also build one axial end of the first flange 17, while the other axial end towards the first end of the cylindrical section 16, but ends before it, so that the cylindrical part of the cylindrical section remains open.

The above order, which provides a second flange, can be repeated when required, to form the third flange and the other flange, if necessary. Accordingly, with this arrangement, increasing the length of the shank along the axis can be protected.

With the above arrangement, when provided by more than one flange, it is preferable that part of the shank were cylindrical, and that each part is increased in diameter in the direction away from the cutting element.

The invention described herein may permit change, improve, and/or other specifically described additions should be understood that the invention includes all modifications, improvements and/or additions that are included in the scope of the following claims.

1. Cutter, containing an elongated shank (10, 10'); a cutting element (11)mounted on one end of the shank and extending from it and is made from a material that is harder than the material of the shank; and a composite sleeve (31, 31'), formed many bands (32, 32') of the sleeve, which is attached around khvostova is a (10, 10') in the vicinity of the cutting element (11) and immediately adjacent to each other, the belts (32, 32') of the sleeve is made from a material that is harder than the material of the shank (10,10'), and which has a lower tendency to form flammable sparks when cutting than the material of the shank.

2. The cutter according to claim 1 in which the said belts (32, 32') of the sleeve made of the same material as the cutting element (11).

3. The cutter according to claim 1 or 2, in which the said belts (32, 32') of the sleeve is made of tungsten carbide.

4. The cutter according to claim 1 or 2, which contains three belt (32, 32') of the sleeve.

5. The cutter according to claim 1 or 2, in which each belt (32) of the sleeve has the same inner and outer diameter.

6. The cutter according to claim 1 or 2, in which the shank (10, 10') forms a flange (17, 17'), which runs essentially perpendicular to the longitudinal axis of the shank between a mainly conical section (15) and the cylindrical section (16, 16'), and a conical section (15) tapers to a cylindrical section (16, 16'), and a cylindrical section forms a groove (18) for placing the supporting part of the cutting element (11), and the belts (32, 32') of the sleeve attached to the shank around the cylindrical part, and one of the belts (32, 32') of the sleeve rests on the flange (17, 17').

7. The cutter according to claim 6, in which the belts (32, 32') of the sleeve are generally cylindrical.

8. The cutter according to claim 6, in which said khvostova is (10') forms a second flange (17'), spaced along the axis from the first flange (17) in the direction from the cutting element (11) and passing essentially perpendicular to the longitudinal axis of the shank, and one or more belts (32') of the sleeve is attached around the shank and are held between the first (17) and second (17') flanges.

9. The cutter of claim 8, in which the shank (10') has a second cylindrical section (16')located between the first (17) and second (17') flanges and having a diameter greater than the diameter of the first cylindrical section (16)which passes from the first flange toward the second flange.

10. The cutter according to claim 1 or 2, in which the belts (32, 32') of the sleeve is attached around the shank (10; 10') with brazing.

11. Cutter, containing an elongated shank (10, 10') of steel; cutting element (11)attached to the cylindrical end section of the shank and extending from it along the axis relative to the longitudinal axis of the shank and is made of material harder than the material of the shank; and a composite sleeve (31, 31'), formed by many ring belts (32, 32') of the sleeve, which is attached around the cylindrical end section of the shank adjacent in the axial direction, and which, in fact, pass through the entire height of this section, and which is made of a material more rigid than the material of the shank (10, 10'), and having less prone to the formation of Wopla anaysha sparks when cutting, than steel shank.

12. The cutter according to claim 11, which contains three belt (32, 32') of the sleeve.

13. How to use the cutter in the development field, and the cutter includes an elongated shank (10, 10), a cutting element (11)attached to one end of the shank and extending from it and made of a material harder than the material of the shank; and a composite sleeve (31, 31'), formed by many ring belts (32, 32') of the sleeve, which is attached around the shank near the cutting element (11) and immediately adjacent to each other, the belts (32, 32') of the sleeve is made from a material that is harder than the material shank (10, 10') and which has a lower tendency to form an igniting spark in the cutting process than the material of the shank (10, 10'), the method includes the stage of development of the field in the environment containing the gas or mine dust.

14. The method according to item 13, wherein the environment contains methane gas.

15. How to use the cutter for field development, and the cutter includes an elongated steel shank; a cutting element (11)attached to the cylindrical end section of the shank and extending from it along the axis relative to the longitudinal axis of the shank and is made of material harder than the material of the shank; and a composite sleeve (31, 31'), images is nnow from a variety of ring belts (32, 32') of the sleeve, which is attached around the cylindrical end section adjacent in the axial direction, which are essentially over the entire height of this section and which is made of a material harder than the material of the shank (10, 10'), and having less tendency to form flammable sparks during cutting, the method includes the stage of development of the field in the environment containing the gas and/or coal mine dust.

16. The method according to item 15, wherein the environment includes methane gas.

17. Cutter, containing an elongated shank (10, 10'); a cutting element (11)mounted on one end of the shank and extending from it and made of a material which is harder than the material of the shank; and an elongated shank has a cylindrical section (16)having a first end adjacent to the cutting element (11), and a second end spaced along the axis in the direction from the cutting element (11) and ending with the first flange (17); an annular sleeve (31, 31'), which is attached around the cylindrical section (16) shank, this ring sleeve rests one axial end of the flange, and the axial other end goes to the first end of the cylindrical section (16), but ends before it so that the cylindrical portion (33) of the cylindrical section remains open, and the sleeve is made of mother of the La, which is more rigid than the material of the shank (10, 10'), and which has a lower tendency to form flammable sparks when cutting than the material of the shank.

18. The cutter on 17, in which said sleeve (31, 31') made of the same material as the cutting element (11).

19. Cutter for 17 or 18, in which said sleeve (31, 31') made of tungsten carbide.

20. Cutter for 17 or 18, in which the sleeve (31, 31') contains many ring belts (32, 32') of the sleeve, which is attached around the cylindrical section (16, 16')that are directly adjacent to each other.

21. The cutter according to claim 20, in which the sleeve has three belt (32, 32') of the sleeve.

22. The cutter according to claim 20, in which each belt (32) of the sleeve has the same inner and outer diameter.

23. Cutter for 17 or 18, in which the flange (17) passes between the generally conical section (15) and the cylindrical section (16), and a conical section (15) tapers to a cylindrical section (16)and a cylindrical section forms a groove (18) for placing the supporting part of the cutting element (11).

24. Cutter for 17 or 18 in which the said shank (10') forms a second flange (17'), spaced along the axis from the first flange (17) in the direction from the cutting element (11) and passing essentially perpendicular to the longitudinal axis of the shank, and the second sleeve (32') is attached around the shank and held the it between the first (17) and second (17') flanges.

25. The cutter according to paragraph 24, in which the shank (10') is cylindrical between the first (17) and second (17') flanges and has a diameter greater than the diameter of the cylindrical section (16)which passes from the first flange (17) in the direction from the second flange (17').

26. How to use the cutter for field development, and the cutter includes an elongated shank (10; 10'); a cutting element (11)mounted on one end of the shank, protruding from it and made of a material harder than the material of the shank, while the elongated shank has a cylindrical section (16)having a first end near the cutting element (11) and a second end spaced along the axis of the cutting element and ending with the first flange (17); an annular sleeve, which is attached around the cylindrical section (16) of the shank, an annular sleeve, resting one axial end on the first flange (17), while the other axial end goes to the first end of the cylindrical section (16), but ends before it, so that the cylindrical section remains open, while the sleeve is made from a material that is harder than the material of the shank (10; 10') and which has a lower tendency to form flammable sparks when cutting than the material of the shank, the method includes the stage of development of the field in the environment containing the gas and/or Rudnya the ing dust.

27. The method according to p in which the environment contains methane gas.



 

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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 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

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.

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: 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, particularly mining picks and holders therefore.

SUBSTANCE: cutter comprises stem and head with main cutting edge extending at acute α angle to face surface, with inner side edge parallel to longitudinal cutter axis. Cutter also has outer side edge inclined to longitudinal cutter axis towards stem and end support surface transversal to stem. Support surface is parallel to main cutting edge. Main cutting edge is shaped as convex broken line defining obtuse angle at apex thereof. The obtuse angle is equal to 180-α. End support surface is congruous to main cutting edge. Outer side face is transversal thereto.

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

3 dwg

FIELD: mining picks and holders therefore, particularly means to retain regulation tools or drilling bits used in mining industry, for trench digging-out and for building works performing.

SUBSTANCE: cutting unit comprises retainer and cutting tool body installed in retainer orifice, as well as fixing bush adapted to retain cutting tool body inside the orifice in axial direction and to freely rotate cutting tool body about longitudinal axis. Fixing bush has tongues bent inwards, which pass into groove formed in cutting tool body shank. Fixing bush has configuration to facilitate small particle removal from the groove during cutting operation performing.

EFFECT: increased ability of free tool rotation and minimized tool clogging with compacted small particles, which prevent free tool rotation.

6 cl, 9 dwg

FIELD: mining machinery building, particularly mining machine structures.

SUBSTANCE: cutting tool has holder including shank and head made as truncated cone. Hard-alloy conical insert having apex and base is installed on end surface of the head. Holder head is provided with cylindrical extension arranged on end surface thereof and coaxial thereto. Hard-alloy insert has cylindrical groove for above cylindrical extension receiving. End surface of holder head is superposed with surface of conical hard-alloy insert base. Conical part of holder head may be enclosed with hard-alloy insert base.

EFFECT: increased operational reliability and reduced hard-alloy consumption for cutting tool production.

3 dwg

FIELD: mining industry, particularly miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam.

SUBSTANCE: device comprises working head, shank with groove for clamping sleeve receiving and with seating surface for protective member installation in its working position. The device also has split clamping sleeve and protective member installed on clamping sleeve so that protective member may perform axial movement. Lower protective member base is spaced a distance from axis of device symmetry relative shank end. The distance is not less than 0.45 of clamping sleeve length measured along the same axis. Protective member thickness is 0.025-0.25 of clamping collar length. Protective member may be formed as flat washer, as plate-like washer, as washer with annular extension located on upper end thereof and cooperating with end working head surface, as washer with additional axial annular extension formed on lower end thereof and cooperating with cutter holder or as at least two washers.

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

6 cl, 5 dwg

The invention relates to mining, and more particularly to tools used on tunnel mountain harvesters

FIELD: mining industry, particularly miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam.

SUBSTANCE: device comprises working head, shank with groove for clamping sleeve receiving and with seating surface for protective member installation in its working position. The device also has split clamping sleeve and protective member installed on clamping sleeve so that protective member may perform axial movement. Lower protective member base is spaced a distance from axis of device symmetry relative shank end. The distance is not less than 0.45 of clamping sleeve length measured along the same axis. Protective member thickness is 0.025-0.25 of clamping collar length. Protective member may be formed as flat washer, as plate-like washer, as washer with annular extension located on upper end thereof and cooperating with end working head surface, as washer with additional axial annular extension formed on lower end thereof and cooperating with cutter holder or as at least two washers.

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

6 cl, 5 dwg

FIELD: mining machinery building, particularly mining machine structures.

SUBSTANCE: cutting tool has holder including shank and head made as truncated cone. Hard-alloy conical insert having apex and base is installed on end surface of the head. Holder head is provided with cylindrical extension arranged on end surface thereof and coaxial thereto. Hard-alloy insert has cylindrical groove for above cylindrical extension receiving. End surface of holder head is superposed with surface of conical hard-alloy insert base. Conical part of holder head may be enclosed with hard-alloy insert base.

EFFECT: increased operational reliability and reduced hard-alloy consumption for cutting tool production.

3 dwg

FIELD: mining picks and holders therefore, particularly means to retain regulation tools or drilling bits used in mining industry, for trench digging-out and for building works performing.

SUBSTANCE: cutting unit comprises retainer and cutting tool body installed in retainer orifice, as well as fixing bush adapted to retain cutting tool body inside the orifice in axial direction and to freely rotate cutting tool body about longitudinal axis. Fixing bush has tongues bent inwards, which pass into groove formed in cutting tool body shank. Fixing bush has configuration to facilitate small particle removal from the groove during cutting operation performing.

EFFECT: increased ability of free tool rotation and minimized tool clogging with compacted small particles, which prevent free tool rotation.

6 cl, 9 dwg

FIELD: mining, particularly mining picks and holders therefore.

SUBSTANCE: cutter comprises stem and head with main cutting edge extending at acute α angle to face surface, with inner side edge parallel to longitudinal cutter axis. Cutter also has outer side edge inclined to longitudinal cutter axis towards stem and end support surface transversal to stem. Support surface is parallel to main cutting edge. Main cutting edge is shaped as convex broken line defining obtuse angle at apex thereof. The obtuse angle is equal to 180-α. End support surface is congruous to main cutting edge. Outer side face is transversal thereto.

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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