Cutter with cutter holder equipped with round shank end

FIELD: mining.

SUBSTANCE: equipped with round shank end cutter is held by means of slit clamping sleeve in aperture of cutter holder and is designed to rotate. Also the clamping sleeve is equipped with holding elements stamped and/or pressed inside; the elements are distributed along perimetre of the clamping sleeve and enter into a circular slot made in the round shank end. Two stamped edges directed across lengthwise axis of the clamping sleeve isolate holding elements. Also stamped edges run along part of perimetre of the clamping sleeve and are arranged at distance one from another corresponding to width of the circular slot in the round shank end of the cutter. Notably, the holding elements form coaxial concave centring section facing the convex bottom of the circular slot.

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

15 cl, 4 dwg

 

The invention relates supplied with round shank cutter with tool holder, which has a round shank through the slotted clamping sleeve is retained in the bore of the tool holder and the clamping sleeve is clamped in the wall of the bore, and a round shank cutter is held rotatably in the clamping sleeve and the clamping sleeve provided with a stamped signs and/or embossed inside the retaining elements, which are distributed along the perimeter of the clamping sleeve and are made in the round shank cutter circumferential groove, so that the clamping sleeve is installed on the round shank cutter without the possibility of displacement in the axial direction.

In such a cutting tool with a tool holder in the axial position of the clamping sleeve on the round shank cutter it is important that the end side of the clamping sleeve lay freely, and the clamping sleeve had the least possible axial clearance. In addition, round shank cutter should be centered in the clamping sleeve by means of the retaining means so that the shank freely goes with a possibility of rotation in the clamping sleeve is clamped in the toolholder bore.

Supplied with round shank cutter with toolholder type mentioned at the beginning is known from EP 0264015 A1 and DE 3712427 A1. In such cutters from the tool holder retaining the elements of the extruded inwards in the form of tackily ribs, so they have a more or less large axial clearance in the circumferential groove of the shank, which also affects the cutter in the case of clamped clamping sleeve in the bore of the tool holder. In addition, the retaining elements in the circumferential groove of the shank of the cutter does not provide sufficient guiding surfaces for a single-centering of the shank, resulting in its rotational movement of the deterioration in the clamping sleeve.

The objective of the invention is provided with a round shank of the cutter with holder mentioned at the beginning of the form to perform retaining the elements of the clamping sleeve so that they are reduced axial clearance and improved centering of the shank in the clamping sleeve so that the shaft can rotate in the clamping sleeve without any deterioration.

This task according to the invention is solved by the fact that the retaining elements are allocated between the two stamped edges directed transversely to the longitudinal axis of the clamping sleeve, and vyshtampovanny and/or extruded inside, and stamped edges pass through the portion of the perimeter of the clamping sleeve and spaced from each other, which corresponds to the width of the circumferential groove in the round shank cutter, while retaining the elements of the form a coaxial concave centering the plot facing the convex bottom of the circumferential groove.

Adjustment of the width of the holding elements to the width of the circumferential groove in the round shank cutter tends to reduce the axial clearance between the clamping sleeve and the shank, while facing the convex bottom of the circumferential groove coaxial concave centering sections of the holding elements optimize functions supplied with round shank chisel in the tool holder.

According to a simple variant of execution provided that the clamping sleeve has three retaining element, of which one retaining element lies opposite the slot in the clamping sleeve, and that both of the other holding element is shifted relative to that of the first retaining element along the perimeter of the clamping sleeve, respectively, by approximately 100°. Thus, the number of retaining elements is reduced to a minimum. For the following calculation of the parameters of the retaining element is provided that the width of the circumferential groove and, thereby, the width of the retaining element selected approximately 1/7-1/6 axial size of the clamping sleeve, and that the concave centering sections of the holding elements are in the angular region of approximately 30°-50° of the perimeter of the clamping sleeve. To hold the elements do not form sharp edges which could affect the rotation of the shank in the clamping sleeve, another embodiment of preduster the covers, that the ends of the concave centering sections (shoulder) retaining elements pass through a convex curve, a transition section and a concave curvature in the inner wall of the clamping sleeve, and an opposite concave centering sections of convex external sites clamping sleeve pass the ends through the concave curvature of the outer wall of the clamping sleeve.

According to one improved variant provides that the retaining elements vyshtampovanny and/or pressed inward so that the convex external sites that protivorechat concave centering sections, spaced from the inner wall of the clamping sleeve, and that the depth of the circumferential groove in the round shank cutter is designed so that the concave centering sections of the holding elements in the case clamped in the toolholder bore clamping sleeve adjacent to the bottom of the circumferential groove or a short distance away from him. Thus optimizes the center of the round shank chisel in the clamping sleeve.

Critical point clamping sleeve rests on the facing side of the top of the cutter end side of the clamping sleeve. To avoid collisions with this front side, which could lead to negative influence on the rotation supplied with round shank cutter, dinarian run provides, he refers to the top of the cutter end face of the clamping sleeve is at a distance from the conical introductory plot holes in the tool holder, which receives a tapered ledge head cutter or centering shoulder wear washers located between the tool holder and cutter head.

Additional superior effect centering of the round shank chisel in the clamping sleeve is achieved in an embodiment by the fact that the retaining elements are located in the middle transverse plane of the clamping sleeve or symmetrically her, and the clamping sleeve can be installed in two axial positions, rotated 180° about its longitudinal axis, round shank cutter and optionally attached to it in one of these two identical provisions. At the same time carried out the installation, i.e. it facilitates the installation of the clamping sleeve on the round shank chisel in the toolholder bore. However, thus also improving the centering clamping sleeve. If you have two or more arranged symmetrically relative to the Central transverse plane of the series of retaining elements, then addition is especially stable bearing of the shank of the cutter.

Insert the round cutter into the hole readersare who I am is based on the fact, the outer edges on both end sides of the clamping sleeve beveled and the beveled outer edge of the end sides of the clamping sleeve are angled approximately 30° to the outer wall of the clamping sleeve.

The invention is explained in more detail by means of embodiment represented in the drawings, on which:

figure 1 is a side view of the stated clamping sleeve, if you look at the slot;

figure 2 is a longitudinal section of the clamping sleeve along the line II-II in figure 1;

figure 3 - cross-section of the clamping sleeve along the line III-III in figure 1; and

4 is a partial longitudinal section provided with a round shank cutter with tool holder, in which the clamping sleeve according to Fig 1 to 3 mounted on the shank and inserted into the toolholder bore.

As shown by figures 1 to 3, the clamping sleeve 10 is parallel to the longitudinal axis 19 of the slot 11 and distributed along the perimeter of the three retaining element 16, 17, 18. The retaining element 16 lies opposite the slot 11. Both of the other holding element 17 and 18 are shifted, respectively, by approximately α=100° relative to the holding element 16 along the perimeter of the clamping sleeve 10. The retaining elements 16, 17, 18 are selected, respectively, two parallel stamped edges 20 and 21 which are directed transversely to the longitudinal axis 19 and pass through the angular region of approximately 30°-50° PE is Imatra clamping sleeve 10.

As shown, in particular, the cross section of figure 3, the retaining elements 16, 17 and 18 are stamped and/or embossed inside and form a single coaxial convex bottom of the circumferential groove 39 concave centering section 22.

The retaining elements 16, 17 and 18 are defined by its width the distance between the stamped edges 20 and 21 and aligned with the width of the circumferential groove 39 in the round shank 31 of the cutter 30.

The concave centering sections 22 of the holding elements 16, 17 and 18 are transferred at their ends through a convex curve 26, a transition section and a concave curve 25 in the inner wall of the clamping sleeve 10, while the opposite concave centering sections 22 convex outer sections of the holding elements 16, 17 and 18 at their ends pass through a concave curve 24, a transition section and a convex curve 23 in the outer wall of the clamping sleeve 10. Due to this, avoid in vyshtampovannyj and/or extruded retaining elements 16, 17 and 18 sharp edges, which may affect the free rotation of the shank 31 in the clamping sleeve 10 and on a tight clamping clamping sleeve 10 in the hole 41 of the holder 40.

As is also evident from figure 3, the retaining elements 16, 17 and 18 vyshtampovanny and/or pressed inward so that their concave centering sections 22 in the clamped clamping wut is tha 10 in the hole 41 of the holder 40 adjacent to the convex bottom of the circumferential groove 39 of the shank 31 or at a slight distance from it, which in turn leads to a very good rotation of the shank 31 in the clamping sleeve 10. While the depth of the circumferential groove 39 in the shank 31 of the cutter 30 is designed so that the convex outer sections of the holding elements 16, 17 and 18 are located at a small distance from the inner wall of the clamping sleeve 10, as figure 3 shows. The width of the holding elements 16, 17 and 18 is approximately 1/7 to 1/6 of the length of the clamping sleeve 10, as shown by figure 2.

While holding elements 16, 17 and 18, as in the famous supplied with round shanks of the cutters from the tool holder, can be located in the end region of the clamping sleeve 10 and the round shank 31, which is drawn from the top of the cutter and has a circumferential groove 39.

In order to improve the centering of the shank 31 in the clamping sleeve 10 and its free rotation of the holding elements 16, 17 and 18 can also be located in the area of the middle transverse plane 38 of the clamping sleeve 10 and to enter the circumferential groove 39 made in this area of the shank 31. In this case, the clamping sleeve 10 can be mounted in two positions on the shaft 31 and secured it in one of two identical provisions. This facilitates mounting of the clamping sleeve 10, as it should not be given in advance in a definite position of the shank 31. In addition, improved centering of the shank 1 and its free rotation, as the clamping sleeve 10 may be less parallel in their longitudinal direction.

As figure 3 shows, the circumferential groove 39 in the shank 31 and the retaining elements 16, 17 and 18 are coordinated with each other so that the facing to the top 37 of the cutter end face 12 also does not act in a conical introductory section 42 of the hole 41 in the tool holder 40 and is freely. In the conical introductory section 42 is the head 36 of the cutter tapered ledge 32 of his shoulder 33, which is adjacent the discharge groove 34 and outlet shoulder 35 of the head 36 of the cutter. The head 36 of the cutter is inserted vertex 37 of the cutter carbide.

Between the head 36 of the cutter and the tool holder 40 can be located also the wear plate, which acts centering shoulder in a conical introductory section 42 of the hole 41 in the tool holder 40 and thus does not come into contact with toward her front side 12 of the clamping sleeve 10.

1. Supplied with round shank chisel (30) with the holder (40), in which a round shank (31) of the cutter (30) through the slotted clamping sleeve (10) is held in the hole (41) of the holder (40), and the clamping sleeve (10) is clamped in the wall of the bore (41), and a round shank (31) of the cutter (30) is held rotatably in the clamping sleeve (10)and the clamping sleeve (10) is provided with a stamped signs and/or the pressure inside the holding elements (16, 17, 18), which are distributed along the perimeter of the clamping sleeve (10) and are executed in a round shank (31) of the cutter (30) of a circumferential groove (39), so that the clamping sleeve (10) is installed on the round shank (31) of the cutter (30) without the possibility of displacement in the axial direction, characterized in that the holding elements (16, 17, 18) highlighted two stamped edges (20, 21), directed transversely to the longitudinal axis (19) of the clamping sleeve (10), and vyshtampovanny and/or pressed inward, and stamped edges (20, 21) pass on part of the perimeter of the clamping sleeve (10) and spaced from each other, which corresponds to the width of the circumferential groove (39) in the round shank (31) of the cutter (30), and the holding elements (16, 17, 18) form addressed to the convex bottom of the circumferential groove (39) coaxial concave centering section (22).

2. The cutter according to claim 1, characterized in that the clamping sleeve (10) has three holding elements (16, 17, 18), of which one holding element (16) lies opposite the slot (11) of the clamping sleeve (10), and both of the other holding element (17, 18) is displaced relative to the holding element (16) on the perimeter of the clamping sleeve (10), respectively, by approximately 100°.

3. The cutter according to claim 1, characterized in that the width of the circumferential groove (39) and, thus, the width of the holding elements (16, 17, 18) is selected from about 1/7 to 1/6 of the axial size of the clamping in ulki (10).

4. The cutter according to claim 1, characterized in that the concave centering sections (22) of the holding elements (16, 17, 18) pass through the angular region of approximately 30°-50° of the perimeter of the clamping sleeve (10).

5. The cutter according to claim 1 or 2, characterized in that the ends of the concave centering sections (22) of the holding elements (16, 17, 18) pass through a convex curve (26), a transition section and a concave curve (25) in the inner wall of the clamping sleeve (10)with opposite concave centering sections (22) is convex outer sections of the clamping sleeve (10) pass the ends through a concave curve (23) in the outer wall of the clamping sleeve (10).

6. The cutter according to one of claims 1 to 4, characterized in that the holding elements (16, 17, 18) vyshtampovanny and/or pressed inward so that the convex external sites that protivorechat concave centering sections (22)are located at a distance from the inner wall of the clamping sleeve (10)with the depth of the circumferential groove (39) in the round shank (31) of the cutter (30) is designed so that the concave centering sections (22) of the holding elements (16, 17, 18) in the case of sandwiched in the hole (41) of the tool holder (40) clamping sleeve (10) adjacent to the bottom of the circumferential groove (39) or are at a small distance from him.

7. The cutter according to claim 5, characterized in that the holding elements (16, 17, 18) vyshtampovanny and/or vidale what s inside so that convex external sites that protivorechat concave centering sections (22)are located at a distance from the inner wall of the clamping sleeve (10)with the depth of the circumferential groove (39) in the round shank (31) of the cutter (30) is designed so that the concave centering sections (22) of the holding elements (16, 17, 18) in the case of sandwiched in the hole (41) of the holder (40) clamping sleeve (10) adjacent to the bottom of the circumferential groove (39) or are at a small distance from him.

8. The cutter according to claim 1 or 2, characterized in that the facing to the top of the cutter (37) the end face (12) of the clamping sleeve (10) is at a distance from the conical input section (42) of the hole (41) in the tool holder (40), which receives a tapered ledge (32) head (36) of the cutter or the centering shoulder wear washers located between the tool holder (40) and a head (36) of the cutter.

9. The cutter according to one of claims 1 to 4 or 7, characterized in that the holding elements (16, 17, 18) are located in the middle transverse plane (38) of the clamping sleeve (10) or symmetrically her, while the clamping sleeve (10) can be installed in two rotated about its longitudinal axis (19) 180° axial positions on the round shank (31) of the cutter (30) and choose to consolidate it in one of these two identical provisions.

10. The cutter according to claim 5, characterized in that the retaining e the cops (16, 17, 18) are located in the middle transverse plane (38) of the clamping sleeve (10) or symmetrically her, while the clamping sleeve (10) can be installed in two rotated about its longitudinal axis (19) 180° axial positions on the round shank (31) of the cutter (30) and choose to consolidate it in one of these two identical provisions.

11. The cutter according to claim 6, characterized in that the holding elements (16, 17, 18) are located in the middle transverse plane (38) of the clamping sleeve (10) or symmetrically her, while the clamping sleeve (10) can be installed in two rotated about its longitudinal axis (19) 180° axial positions on the round shank (31) of the cutter (30) and choose to consolidate it in one of these two identical provisions.

12. The cutter according to claim 9, characterized in that the outer edges (14, 15) beveled on both end faces (12, 13) of the clamping sleeve (10).

13. The cutter of claim 10 or 11, characterized in that the outer edges (14, 15) beveled on both end faces (12, 13) of the clamping sleeve (10).

14. The cutter according to item 12, characterized in that the beveled outer edges (14, 15) of the clamping sleeve (10) are at an angle of about 30° to the outer wall of the clamping sleeve (10).

15. The cutter according to item 13, characterized in that the beveled outer edges (14, 15) of the clamping sleeve (10) are at an angle of about 30° to the outer wall of the clamping in ulki (10).



 

Same patents:

FIELD: mining.

SUBSTANCE: suggested invention is related to the field of mining and construction, in particular to cutters with round tails. Cutter with round tail comprises tail, at the same time tail is retained with the possibility of rotation in clamping cartridge. Clamping cartridge is equipped with one or several retaining elements that protrude inside, which enter circular groove arranged in cutter tail, so that clamping cartridge is retained on round tail of cutter without possibility of shift in axial direction. One or several retaining elements are installed in medium transverse plane of clamping cartridge or have identical axial distance from it. Clamping cartridge is arranged with the possibility of installation in two axial positions turned by 180° around its longitudinal axis on round tail of cutter and fixation on it selectively in one of both identical positions. Retaining elements are arranged between two oriented forming edges across longitudinal axis of clamping cartridge and are stamped and/or impressed inside. Besides forming edges pass along part of clamping cartridge circumference and have distance from each other, which is equal or less than width of circumferential groove in round tail of cutter.

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

11 cl, 4 dwg

Tool holder // 2334105

FIELD: mining.

SUBSTANCE: tool holder with toolhead has a cutter head in the retainer catch, the said cutler head being designed to receive a cutler capable of being inserted and replaced. The cutter head is mode in the form of a socket and is furnished with a hole for inserting the cutter. The toolhead has fixation side with retainer catch and outer side oriented opposite to the fixation side, so that during tool operation centrifugal forces are directed from the fixation side to the outer one. The retainer catch has an aperture passing through inner wall of the cutter head and forming dimensional connection to the environment, the said aperture opening the cutter head towards the outer side.

EFFECT: prevention of cutter jamming due to rock mass litter getting into the head.

8 cl, 6 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

FIELD: mining industry, particularly for mining operation and construction and repair work performing.

SUBSTANCE: device has rotary cutter with shank and working head having annular support surface. Device also comprises cuter holder having orifice for cutter shank receiving and annular support surface, stop member for cutter shank fixation in cutter holder orifice and thrust member rotary arranged between working head and cutter holder. Thrust member has upper base and lower base carrying projection. Thrust member has additional projection located on upper base thereof and annular support surface cooperating with that of working head. Projection of lower base has annular support surface to cooperate with that of cutter holder. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of main thrust member projection. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of working head.

EFFECT: increased service life due to uniformity of cutter rotation during operation, increased reliability due to reduced friction between cooperating surfaces of thrust member, working head and cutter holder.

13 cl, 5 dwg

The invention relates to mining, in particular electric device for mining machines

The invention relates to mining and construction

The invention relates to the mining industry, namely, devices for mounting cutters Executive bodies of mining machines

The invention relates to the mining industry and can be used in the manufacture of cutting tools for mining and road machines

FIELD: mining industry, particularly for mining operation and construction and repair work performing.

SUBSTANCE: device has rotary cutter with shank and working head having annular support surface. Device also comprises cuter holder having orifice for cutter shank receiving and annular support surface, stop member for cutter shank fixation in cutter holder orifice and thrust member rotary arranged between working head and cutter holder. Thrust member has upper base and lower base carrying projection. Thrust member has additional projection located on upper base thereof and annular support surface cooperating with that of working head. Projection of lower base has annular support surface to cooperate with that of cutter holder. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of main thrust member projection. Width of support surface formed on additional projection is 0.15-1.0 of that of support surface of working head.

EFFECT: increased service life due to uniformity of cutter rotation during operation, increased reliability due to reduced friction between cooperating surfaces of thrust member, working head and cutter holder.

13 cl, 5 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

Tool holder // 2334105

FIELD: mining.

SUBSTANCE: tool holder with toolhead has a cutter head in the retainer catch, the said cutler head being designed to receive a cutler capable of being inserted and replaced. The cutter head is mode in the form of a socket and is furnished with a hole for inserting the cutter. The toolhead has fixation side with retainer catch and outer side oriented opposite to the fixation side, so that during tool operation centrifugal forces are directed from the fixation side to the outer one. The retainer catch has an aperture passing through inner wall of the cutter head and forming dimensional connection to the environment, the said aperture opening the cutter head towards the outer side.

EFFECT: prevention of cutter jamming due to rock mass litter getting into the head.

8 cl, 6 dwg

FIELD: mining.

SUBSTANCE: suggested invention is related to the field of mining and construction, in particular to cutters with round tails. Cutter with round tail comprises tail, at the same time tail is retained with the possibility of rotation in clamping cartridge. Clamping cartridge is equipped with one or several retaining elements that protrude inside, which enter circular groove arranged in cutter tail, so that clamping cartridge is retained on round tail of cutter without possibility of shift in axial direction. One or several retaining elements are installed in medium transverse plane of clamping cartridge or have identical axial distance from it. Clamping cartridge is arranged with the possibility of installation in two axial positions turned by 180° around its longitudinal axis on round tail of cutter and fixation on it selectively in one of both identical positions. Retaining elements are arranged between two oriented forming edges across longitudinal axis of clamping cartridge and are stamped and/or impressed inside. Besides forming edges pass along part of clamping cartridge circumference and have distance from each other, which is equal or less than width of circumferential groove in round tail of cutter.

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

11 cl, 4 dwg

FIELD: mining.

SUBSTANCE: equipped with round shank end cutter is held by means of slit clamping sleeve in aperture of cutter holder and is designed to rotate. Also the clamping sleeve is equipped with holding elements stamped and/or pressed inside; the elements are distributed along perimetre of the clamping sleeve and enter into a circular slot made in the round shank end. Two stamped edges directed across lengthwise axis of the clamping sleeve isolate holding elements. Also stamped edges run along part of perimetre of the clamping sleeve and are arranged at distance one from another corresponding to width of the circular slot in the round shank end of the cutter. Notably, the holding elements form coaxial concave centring section facing the convex bottom of the circular slot.

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

15 cl, 4 dwg

FIELD: mining.

SUBSTANCE: attachment point of mine cutting tool consists of holder, secured on executive device, of cutter with cone cutting part and rotating shank end secured in holder. The attachment point of the mine cutting tool is equipped with a swinging mechanism kinematically coupled with the shank end of a cutting insertion and made in form of a mechanical trigger facilitating a swivel of the cutter around axis. Also the cutting insertion swinging mechanism corresponds to three bushings inserted one into another and equipped with radial lugs axially tapered on ends.

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

6 dwg

Cutter remover // 2432252

FIELD: process engineering.

SUBSTANCE: invention relates to toll intended for removing cutter from cutter holder. Proposed remover comprises moving base element to receive actuator that has ejection core. Said actuator is directly or indirectly jointed with cylinder-piston or electric drive. Said actuator is arranged on base element to turn about rotary support. In compliance with second version, said ejection core is driven by actuator mechanism. In compliance with third version, said base element is provided with rest section for rest on cutter holder or wear-resistant washer. In compliance with fourth version, ejection core is jointed with flexible element, in particular, to chain. Note here that flexible element is fitted with no lengthwise camber in guide, in particular, tube. In compliance with fifth version, ejection core 65 is driven by fluid 66.3.

EFFECT: fast and simple removal.

16 cl, 8 dwg

FIELD: mining.

SUBSTANCE: method for attachment of rock destroying inserts in working element of drilling tools and sinking machines involves inserts location in bushes made of flexible material that are pressed-in into working element of drilling tool and sinking machines, note that there are longitudinal channels on bushes external surface for air supply and distribution of stresses during pressing-in.

EFFECT: increase of error-free running time of working elements.

FIELD: process engineering.

SUBSTANCE: invention relates to cutter, particularly, to cutter with round shank comprising cutter head and cutter shank. Note here that fastening bush is retained in the cutter shank zone while said cutter is equipped with thrust element with guide zone. In compliance with this invention, for ease of cutter handling, said thrust element has deflecting section arranged in its zone opposite the cutter head bottom. Said section adjoins the guide zone to allow fastening bush to change from unlocked position to locked position of from partially locked position to locked position. Note also that guide zone extends through rounded flare to aforesaid thrust surface.

EFFECT: perfected design.

13 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to drilling and can be used in production of diamond drill bits with steel bodies. Drill bit comprises body, flushing assemblies, PDC cutters arranged in bushes of plastic metal fitted in blade holes. PDC cutter is attached with the help of two conical lock bushes fitted one into another. One of the latter has outer cylindrical surface mating with blade hole wall and inner conical surface symmetrical about hole axis, its cone vertex facing its bottom. Another bush with inner cylindrical surface mating with PDC cutter bottom surface and outer conical surface symmetric with hole axis, cone vertex facing its inlet. PDC cutter mount hole bottom has through hole in blade of smaller diameter intended for mounting or withdrawing of PDC cutter by axial impacts or squeezing with the help of drift pin to allow worn-out section turn and replacement at cutting edge by turn through required angle relative to axis or complete replacement of PDC cutter with new one.

EFFECT: higher reliability, longer life, simplified repair.

8 dwg

Up!