Toolhead for carbon or winning drawknife cutter, and cutter

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

 

The invention relates to a tool holder for a cutting tool, in particular cutter slitting open coal or mining plow, open at its upper side, is made to receive and support the shank of the cutter mounting pocket, which is limited by two side edges relative to the working direction of the plane, one front and one rear support walls, and the rear support wall protrudes above the front support wall. The invention relates also to the cutter, in particular slitting open the cutter containing a head and a shank, the insertion in the mounting pocket of the tool holder and secured therein by means of the fixing bolt.

Mine plows with cutters and cutter holders for both working directions of the plane, welded, in particular, to a turning restenosis, have long been used by the applicant. On each resensitise plow secured several distributed over the height of the holders, each of which has an outdoor mounting pocket for reception of the shank of the cutter. Each mounting pocket of the tool holder is limited by two side edges relative to the working direction of the plane, one front and one serving over her rear supporting wall, and at least one tool holder each restenosis is for placing slitting open the cutter, which cuts on livemy coal directly lying on the side of the reservoir. When working a mine plow all cutters are exposed to high and slitting open the cutter is particularly high loads, which lead to excessive wear of the cutter slitting open. Because of these increased efforts receiving the shank slitting open cutter - holder also subject to relatively high loads.

In underground mining it is necessary to regularly replace all coal cutters or a mine plow. The authors of this application have found that determining the frequency of replacement of all incisors coal or mining plow is more severe wear of the holder cutter slitting open. The applicant has observed that, in particular, mine plows, of which have known from DE 29901985 U1 cutter holders and form the prior art for the present invention.

The holder of the DE 29901985 U1 has, with the exception of holes for clogging latch cutter, symmetrical design and includes a rear support wall, which rises significantly above both the lateral and the anterior support wall for supporting the cutter on a large area even under high loads and at the return of the plane due to the high effort of the plane. The tool holder elevation at the rear in relation to the working direction of the plane of the supporting wall consciously expressed only in the Central region and extends to both lateral abutment with encom, and at the same time, the end faces of the side edges of the rear supporting wall provided with guide surfaces to achieve when working optimal allocation of coal dust. This eliminates the dead space between the side and rear bearing walls, which could be filled by the plow coal fines, and at the same time, an optimum allocation of coal dust during operation.

Proceeding from this known tool holder, the basis of the invention lies in the minimization problem due to the high work effort by the plow between the shank of the cutter and the tool holder wear on contact surfaces in the area of the mounting pocket in order to increase the service life of the tool holder or the inserted cutter and to provide a longer replacement period.

This problem is solved according to the invention due to the fact that the side support wall, turned by the plow of the treatment or gate, i.e. from the side of the bookmark serves as the front, and on the opposite side, when the plow is located from the side of the stope support wall and forms an elongated relative to it (side tabs) lateral support for the shank of the cutter. Longer lateral support wall forms, in particular, on its towering over more than the short supporting wall section, additional supporting shoulder for the side struts inserted and fixed cutter. The invention can be implemented with a particular advantage of the tool holder for slitting open the cutter, as applied through slitting open the cutter to its holder efforts, i.e. the load on the holder cutter slitting open, higher than the load to other holders. The basic idea of the invention can be, however, it is implemented by all holders of coal or mining plow. Due to the made longer according to the invention the side wall located on the side of the bookmark, achieved significantly improved backup shank cutter on the more heavily loaded, limiting the mounting pocket base wall located on the side of the bookmark. The result is a counter rollover is inserted in the tool holder cutter to roll over at lower contact pressures between the contact zones. High transverse forces introduced due to the installation depth of cut when the slip guide mining the plane of the conveyor in the direction of the stope in the cutter and pocket cutter, can therefore be perceived more favorably than in the prior art and to counteract the knockout or the extension of the mounting pocket.

In the preferred embodiment to implement the Oia longer lateral support wall towering over the shorter of the side support wall to the front support wall, essentially constant. Next, the mounting pocket can be located mostly asymmetrically between the lateral supporting walls and having outer surface of the shorter side support wall of the tool holder less distance than the outer surface of the longer side support walls. Due to the asymmetric execution pocket for cutter and through respectively aligned with different loads of different thickness of the side support wall mounting pocket of the tool holder acquires more optimally consistent with the perceived effort geometry without increasing the risk that the tool holder when the movement of the plane will be exposed to higher provided repulsed coal efforts. Also here, preferably, if the shorter side support wall located on the side of the stope, has a smaller thickness than the longer side support wall located on the side of the bookmark. The thickness of the longer side support walls continuously decreases mainly, at least part of the height. In addition, the outer side of the longer side of the supporting wall at the height part can be inclined to the longitudinal Central plane of the mounting pocket of the tool holder.

In addition, the rear support wall is mostly only in the area of exaltation, which acts on the two lateral supporting walls and forms an additional back support for the cutter. To achieve the removal of coal dust is also preferable if the two lateral supporting walls are made with or in the form of bevels, descending to the mounting pocket. Bevels can be, in particular, at an angle of approximately 93° to the longitudinal Central plane of the mounting pocket.

Hereinafter, mainly the bounding sides of the mounting pocket inner surface of both side supporting walls are made flat, and the distance between them increases from the bottom of the mounting pocket upwards, i.e. towards the upper side of the tool holder. The inner surface of both side support walls may diverge, in particular, with respect to the longitudinal mid-plane mounting of the pocket at an angle of approximately 1-2°in particular approximately 1.8°. At the same time, as you know, the inner surface of the front and rear support walls should slope to the working direction of the plane, and the angle of inclination, in particular, in the preferred embodiment, is 50-60°in particular 54,5±1°. The bottom of the pocket of the toolholder mostly open.

For fixing the tool holder is inserted cutter, as you know, in front of the supporting wall made a hole for entry to stem the locking bolt. The holder according to the invention the hole for the input goes mainly performed in the inner surface of the shorter side support wall of the groove to enter and/or completely through the rear base wall of the mounting hole of the free end of the rod so that the locking bolt could optimally be entered in the tool holder, and coal could be beaten out, and in a fixed position to secure the shank of the cutter at the same time in the front, the rear and the shorter side support walls. In particular, preferably, if the hole for the input and the mounting hole is made in the cross-section is rectangular with rounded corners, predominantly of a size in the light entry opening and mounting holes of constant height and with increasing insertion depth is reduced in width. Next, the front support wall mainly provided above the insertion opening for protruding nose as protection for the head of the clamping bolt. In order for this embodiment to further improve the support is inserted in the tool holder cutter, the front face of the spout may be provided with a chamfer and/or mouth as additional support for the cutter head. The mouth may be made V-shaped with flat sides, and the line of intersection of the surface is of Hosta both sides mainly aligned to the top of the elevation on the rear support wall and the longitudinal mid-plane.

Further, on the side stope, i.e. over a shorter lateral support wall, the side surface of the rear supporting wall can be advantageously provided, in particular, rounded grooved recess, and the recess may, in particular, to descend to the mounting afford inclined inwards, forming on or over a shorter lateral support wall guide surface to facilitate entry of the shank of the cutter in the mounting pocket.

The task according to the invention is also solved by means of the cutter, in particular slitting open cutter, contains the head and are inserted in the mounting pocket of the tool holder and fastened there by means of the fixing bolt shank having at forming a mounting pocket sides of two essentially flat contact surfaces, which, according to the invention, one side of the shank has a longer contact surface than the other side and shorter side of a shank provided with an open edge of the groove to enter the locking bolt. The corresponding cutter may be longer at the work of the bookmark contact surface snugly around the mounting height of the pocket to its correspondingly longer bearing surface or bearing wall.

Other benefits and options for implementation, the value of the tool holder according to the invention, and chisel plow according to the invention follow from the following description schematically depicted in the drawings, the case for asymmetric pocket for slitting open the cutter and asymmetric slitting open the cutter. In the drawings shown:

figure 1 - the holder cutter slitting open the incision with inserted and fixed cutter;

figure 2 - in the future the tool holder according to the invention;

figure 3 - tool holder according to the invention, figure 2 in side view;

4 is a view of the front side of the tool holder of figure 2;

5 is a section along the line V-V of figure 3;

6 is a section along the line VI-VI in figure 3.

In the drawings 10 is indicated consisting of a casting tool holder, made in the form of a holder inserted slitting open of the cutter 1. Slitting open the cutter 1 has located in the installation position outside of the tool holder 10 of the cylinder 2 with soldered carbide cutting plate 3A and at least one soldered carbide pin 3B on the cutting surfaces. In one piece with the cylinder 2 is connected to the shank 5, which is inserted in the open (figure 1) on the upper side 11 of the tool holder 10 of the mounting pocket 12 and placed in the pocket 12 flush. The shank 5 has two sides a large area of which is shown in figure 1 side 6 is supplied oriented will bring the flax parallel to the bottom side 7 of the shank groove 8 to the input terminal 51 is indicated POS locking bolt, through which the fixed mounting position of the cutter 1 in the mounting pocket 12 of the holder 10.

Shows the tool holder 10 is designed, in particular for welding to the rotary resensitise (not shown) underground, guided along the guide chain scraper conveyor mining the plane as the bottom or one of the two bottom-most holders. For this purpose, the tool holder 10 are welded to its lower edge 26 to resensitise so that the mounting pocket 12 or the upper side 11 of the tool holder 10 is turned to the supine side of excavation bottom, so that the cutting plate 3A and the cutting pin 3B cutter 1 was able to separate the coal on the transition from lying flank to Oistamo face. When working a plow (not shown) moves in the direction of the arrow a in figure 1. Arrow a indicates, therefore, the working direction of the plane for slitting open of the cutter 1, and in the installation position on resensitise tool holder 10 is oriented so that the longitudinal middle plane of the mounting pocket 12 of the holder 10, as shown in figure 1, parallel to the working direction And Struga. When the work is seen in relation to figure 1 and the operating direction And the plane of the side 6 of the shank 5 of the cutter points in the direction of stope, while the opposite side of the shank points in the direction of sacla the internal side, as the shaft 5 is supported at its front side 4 of the front support wall 13 of the pocket for the cutter, and at its outside side 9 rear support wall 14 in the mounting pocket 12 of the holder 10. Front side 4 of the shaft 5 passes through its entire height straightforward, however, relative to the working direction And the plane tilted back to the bottom side 7 of the shank, while the non-working party 9 on the greater part of the height of the shank is parallel to the front side 4, but near the lower side becomes bent at right angles to the working direction And plane of section 9A. The inner surface of the mounting pocket 12 on the front 13 and rear 14 of the supporting walls are respectively tilted to the working direction of the plane, and the angle of inclination is about 54,5°.

Figure 1 is clearly seen that the rod 51 of the clamping bolt 50 passes through the hole 15 to enter in front of the supporting wall 13 and through the mounting hole 16 in the rear support wall 14 of the holder 10 or included in them and at the same time lies partly in the groove 8 to enter in the wall 6 of the shank 5 of the cutter. For fixing the locking bolt 50 in the mounting position, in which its cylinder 52 adjacent to the outer side 17 of the front support wall 13, the recess 8A in the side 6 of the shank is L-shaped plastic saimn the I part 60, short off shoulder 61 which is provided with a hole or round notch and enters the groove 53 for input on the locking bolt 50. To remove the locking bolt 50 from the mounting position to its head 52 should be made, therefore, a relatively large force in the direction of the arrows, i.e. in the direction of the plane, and for the application of this effort is a necessary tool, as when the plow acting on the cutter 1 efforts are directed towards the working direction And Struga. The above-described basic design of tool holder 10 is inserted and fixed in its mounting pocket 12 shank 5 of the cutter 1 is known to the expert.

According to the invention, as shown in figure 1 only schematically, one of the two lateral supporting walls, namely a lateral support wall 20 located by the plow from bookmarks and so on figure 1 for cutter 1 made longer and higher than the other support wall located on the side of the stope (not shown). Longer support wall 20 at the same time rises above the front support wall 13. This is evident from the following description of the tool holder 10, shown in detail in figure 2-6.

Figure 2 shows that the mounting pocket 12 of the tool holder 10 is limited to the front 13, rear 14 and two side 20, 21 of the supporting walls. In particular, in conjunction the Institute with 3 and 5 it is clear, the top side 21, located at the work of the bookmarks, the supporting wall 20 rises above the upper side 32 of the other support wall 30 located on the side of the stope, about 1/3 of the entire length of the shorter of the support wall 30 along the entire length of the mounting pocket 12 with the same size in height. Bounding the mounting pocket 12 and the inner surface 22 of the support wall 20 forms so the shank of the cutter height mounting pocket 12 back with a much larger area than the inner surface 31 of the shorter support wall 30. Because the plow during operation, i.e. when it moves in the direction (A, 1), must be podvinut for coal mining on the desired depth of cut to Oistamo the bottom, inserted into the tool holder 10, the shank of the cutter and the support wall 20 is loaded from the bookmarks stronger than that of the stope. Longer support the inner surface 22 of side support walls 20 and selected a much larger thickness of the latter are adapted to these loads, and considering the height of the longer base surface of the support wall 20 provides the particular advantage that provided through the head of the cutter on the shank of the tipping moment is perceived by bookmarks almost the entire height of the shank of the cutter. The whole plot longer Boko is OI the supporting wall 20, towering above the upper side 18 of the front support wall 13 and the top side 32 of the shorter side support wall 30 forms, therefore, additional, located at the side of the bookmark anchor the shoulder to the side of the shank of the tool, located with the sides of the bookmark.

Longer support wall 20 passes to the speaker of the spout 19 of the front support wall 13. In particular, figure 5 illustrates that the surface 21 is longer support wall 20 and surface 32 of the shorter side support walls 30 are inclined to the mounting pocket 12, and both surfaces 21, 32 preferably is formed with a longitudinal middle plane M of the mounting pocket 12 respectively an angle of about 93°. At the same time, both the inner surface 31,22 lateral support walls 30.20mm to diverge at a small angle about 1.8° relative to the longitudinal mid-plane M, thereby mounting the pocket 12 is uniformly extends in both directions from the open bottom 12A to the surfaces 21, 32.

From 3-5 further shows that the rear support wall 14 is in the middle pane, the rise of 40, which is even marginally acts not only for a shorter lateral support wall 30, but for more long and thick lateral support wall 20, forming an extra side head support for the cutter on the back side of the mounting is Arman 12. The transition elevation 40 to the shorter side support wall 30 occurs through arcuate rounded transition section 41 until the surface 32 of the shorter side support wall 30. Includes a transition section 41 of the side surface of the rear support wall 14, which passes laterally from the mounting pocket 12 and over shorter side support wall 30, is supplied downward to afford 12 rounded grooved recess 42 as an input accessories for the shank of the cutter.

In particular, figure 4 and 5 show that the external wall 23 of the longer side support walls 20 over is made near the bottom side 13 of the mounting pocket 12 chamfer 24 for welding passes obliquely to lying asymmetrically to the longitudinal mid-plane M of the mounting pocket 12 so that the thickness of the side support walls 20 are further reduced by increasing the height of the tool holder 10. Figure 4 also shows that the speaker is on the front of the supporting wall 14 of the nozzle 19 provided with a V-shaped beveled groove, both surfaces 19A, 19B converge at an obtuse angle of approximately 175-188°. While the protruding spout 19 protects the head 52 of the bolt (figure 1), a V-shaped bevel forms an additional support surface for supporting a reed cutter under his head (2, IG). To achieve the preferred lock the locking bolt (50, 1) in the tool holder 10, the height of the light holes 15 to enter and mounting hole 16 in the tool holder 10 remains essentially constant, while their clear width, i.e. the length between the support walls 20, 30, continuously decreases to the mounting hole 16, as shown, in particular, figure 6.

From the preceding description of the expert it is clear that depicted in figure 1 cutter 1 includes a shank 5, the back, invisible in figure 1, the side of which has a substantially longer essentially flat contact surface for contact with the longer side support wall 20 than the visible figure 1 is a front side 5 of the shank. Due to this, the cutter according to the invention aligned with the tool holder. The cutter according to the invention the sides of the shank need not be made flat over the entire surface, and may be near the groove to enter the locking bolt also other hollows. Equally, in General, as the contact surface fit to the bounding surfaces of the mounting pocket occurs relatively flat surface area.

1. Tool holder for a cutting tool, in particular cutter slitting open coal or mining plow, open at its upper side (11), the implementation of the military to receive and support the shank of the cutter mounting pocket (12), which is limited by two side edges (20, 30) with respect to a working direction (A) of the plane, one of the front (13) and one rear (14) of the supporting walls, and the rear support wall (14) is above the front support wall (13), characterized in that one lateral support wall (20), turned by the plow from the stope, protrudes from the front (13) and the other side (30) of the supporting walls and forms elongated relative to the other side of the supporting wall (30) of the lateral support for the shank the cutter.

2. Tool holder according to claim 1, wherein the longer side support wall (20) dominates the shorter side support wall (30) up to the front support wall (13) at essentially a constant height.

3. Tool holder according to claim 1 or 2, characterized in that the mounting pocket (12) is located asymmetrically between the lateral support wall (20; 30) and has an outer surface (33) of the shorter side support wall (30) to a smaller distance than the outer surface (23) of a longer side of the supporting wall (20).

4. Tool holder according to claim 1, wherein the longer side support wall (20) has a greater thickness than the shorter side support wall (30).

5. Tool holder according to claim 4, characterized in that the thickness of the longer side of the supporting wall (20) continuously mind is leetse, at least part of the height.

6. Tool holder according to claim 3, characterized in that the outer side (23) of a longer side of the supporting wall (20) of the height passes obliquely to the longitudinal mid-plane (M) mounting pocket (12).

7. Tool holder according to claim 1, characterized in that the rear support wall (14) is in the middle pane elevation (40), which acts on both lateral supporting wall (20; 30) and forms an additional back support for the cutter.

8. Tool holder according to claim 1, characterized in that the surface (21;32) of the two lateral supporting walls (20;30) is made with bevels, descending to the mounting pocket (12).

9. The tool holder of claim 8, wherein the bevels are at an angle of about 93° to the longitudinal mid-plane (M) mounting pocket (12).

10. Tool holder according to claim 1, characterized in that the bounding sides of the mounting pocket (12) of the inner surface (22; 31) of the side support wall (20; 30) is made flat, and the distance between them increases from the bottom (2A) of the mounting pocket (12) to the upper side of the holder (10).

11. The tool holder of claim 10, wherein the inner surface (22; 31) of the two lateral supporting walls (20; 30) are inclined to the longitudinal mid-plane (M) mounting pocket (12) at an angle 1-2°preferably 1,8°.

12. Tool holder according to claim 1, characterized those who, the inner surface of the front (13) and rear (14) of the support walls are at an angle to the working direction (A) of the plane, and the angle of inclination is preferably 50-60°in particular approximately 54,5±1°.

13. Tool holder according to claim 1, characterized in that the bottom (12A) mounting pocket (12) is made open.

14. Tool holder according to claim 1, characterized in that the front support wall (13) performed a hole (15) for inserting a pin locking bolt that goes in the groove (34) for entry are made in the inner surface (31) of the shorter side support wall (30), and/or transmitted mainly through the rear support wall (14) mounting hole (16) to the free end of the rod.

15. Tool holder according to 14, characterized in that the opening (15) to enter and mounting hole (16) is made in the cross-section is rectangular, preferably with rounded corners, preferably the size of the light hole (15) to enter and mounting holes (16) are constant in height and increases insertion depth is reduced in width.

16. Tool holder according to 14, characterized in that the front support wall (13) is provided above the opening (15) to enter the projecting spout (19) as a protection for the head of the clamping bolt.

17. Tool holder according to item 16, characterized in that the front face (1A, 19C) of the spout (19) provided with a chamfer and/or mouth as additional support for the cutter head.

18. Tool holder according to claim 1, characterized in that the side surface (41) of the rear support wall (14) provided on a shorter side support wall (30) is preferably rounded grooved recess (42).

19. Tool holder for p, characterized in that the recess (42) extends obliquely inwards towards the mounting pocket (12).

20. The chisel plow, in particular slitting open the cutter, tool holder (10) according to any one of claims 1 to 19, containing the head (2) and are inserted in the mounting pocket (12) of the holder (10) and fixed there by means of the fixing bolt (50) shank (5), characterized in that one side of the shank has a longer contact surface than the other side (b) of the shank, and it comes open on the edges of the groove (8) to enter the locking bolt.

Priority items:

29.12.2003 according to claims 1-20.



 

Same patents:

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

The invention relates to the mining industry, in particular to instruments for the destruction of mineral and synthetic materials, and can be used in the working bodies of the mining and roadheaders in the extraction of minerals and the formation of openings in the soil, as well as in the working bodies of construction and road machinery in the construction and repair of roads, airfields and other industrial facilities

The invention relates to the mining industry, and in particular to tools for mining machines

The invention relates to the mining and construction industries, t

The invention relates to mining and construction

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

Up!