Cutter for mining machines
SUBSTANCE: cutter for mining machines includes a holder with an axial channel. A cutter shank is fixed in axial channel with possibility of being turned and with possibility of restricted axial movement. Also, elastic element in installed in axial channel between end face of axial channel and shank. Peculiar feature of the above proposed cutter is that holder is provided at least with one radial slot in which a guide rod is fixed. Cutter shank is equipped with a bushing rigidly attached to it, the projecting part of which is provided with a wear-resistant material. Opposite (lower) part of the bushing is provided with an inclined slot for interaction with a guide rod of the holder. Besides, wear-resistant material is applied to external surface of the bushing in the form of inclined strips located in a staggered order.
EFFECT: such design of cutter allows increasing its operating efficiency and operating efficiency of an element of a continuous heading or extracting machine as a whole.
2 cl, 2 dwg
The invention relates to the mining industry, namely the rock cutting tool the tool used to equip the Executive bodies of excavation and tunneling machines.
Known cutter for mining machines, containing a cylindrical shank with an axial conical bore for the shank of the cutting tip with carbide element (see U.S. patent No. 342532, CL-92, 1967).
The disadvantages of the known cutter should be attributed to the relatively low resistance and a large amount of solid alloy.
Closest to the proposed to the technical essence and the achieved result is a cutter for mining machines comprising a shank with an axial channel, which can be rotated and limited axial movement of the anchor shank of the cutting tip and mounted in the axial channel between the end face of the axial channel and the shank of the elastic element (see avts of the USSR №1602985, CL ES 25/38, 1990).
The negative sides of this cutter should be attributed to the lack of efficiency in the work that is associated with a sharp decline in the probability of turning cut after blunting the sharp edges of the spring. Dulling of the edges of the springs may occur in the initial moment when the digging machine in view of the considerable pressures on them, especially when drilling in hard rocks. Moreover, the increase in solids the spine of the bottom of the axial channel of the tool holder and the end face of the shank of the cutter to reduce wear their sharp edges of the spring will cause slippage of the spring, consequently, and to the impossibility of rotation of the cutter. Another reason for low efficiency of the tool, especially when working in abrasive rocks, is one-sided wear of the upper part of the shank, which often leads to the deposition of wear-resistant inserts and hit her under other wear-resistant inserts adjacent cutters and their failure.
In connection with the stated technical result of the invention is to improve the efficiency of the cutter guaranteed by rotation of the cutter during the entire time of its operation and protection of the shank of the cutter from one-sided wear.
This technical result is achieved by the fact that the cutter for mining machines comprising a shank with an axial channel, which can be rotated and limited axial movement of the anchor shank of the cutting tip and mounted in the axial channel between the end face of the axial channel and the shank of the elastic element according to the invention the holder is made of at least one radial channel in which a fixed guide rod and the shank of the cutting tip is fitted rigidly connected with it by a sleeve, the protruding portion which is equipped with wear-resistant material, and the opposite part is made with a sloped groove on the outer surface for engagement with the guide rod powers the I.
The achievement of the technical result is also that the wear-resistant material deposited on the outer surface of the sleeve in the form of inclined strips, arranged in a checkerboard pattern.
The invention is illustrated in the drawing, in which figure 1 shows a General view of the cutter in a longitudinal section; figure 2 - cross section A-a in figure 1.
The cutter consists of a shank 1, a cylindrical axial channel 2 is installed on the shank 3 of the cutter with carbide work item 5 of wear-resistant material. The shank 3 of the cutter is fixed in the tool holder 1 locking pin 6, providing limited axial movement. In the axial channel 2 of the holder 1 between the shank 3 of the cutter and the bottom of the axial channel has elastic element 7 in the form of compression springs. The holder 1 is made of at least one radial channel 8, which is fixed to the guide rod 9 and the shank 3 of the cutter is fitted rigidly connected to it by a removable sleeve 10. Possible option of the holder and sleeve respectively with multiple guide rods 9 and the return of the inclined grooves 11. When working in the first place, abrasive rocks of the outer surface of the protruding upper part of the sleeve 10 must be equipped with a wear-resistant material in the form of inclined strips 4 arranged in staggered and overlapping the surface of the shank is 3 over the entire circumference. The opposite (lower) part of the sleeve 10 is made with an inclined groove 11 for engagement with the guide rod 9 of the holder 1. Guide rod 9 in conjunction with the sleeve 10 forms a node of forced rotation of the cutter during the entire time of its operation. This host is running, the rotation of the shank 3 improves the stability of the sleeves 10, which may be made of a different material compared to the shank 3. However, they can be used multiple times thanks to their detachable connection with the shank 3, which will reduce the cost of installing desktop authority digging machine cutters. Equipping the outer surface of the sleeve 10 a wear resistant material and inclined chessboard pattern of stripes 4 one-sided wear of the shank 3, even if the destruction of abrasive rocks and thus eliminates loss work item 5.
The principle of operation of the cutter is as follows. In the fracture process of rock cutting carbide work item 5 of the cutting tip 3 under the influence of the reaction destructible rocks shank 4 cutter tip 3 is moved in the axial direction and compresses the elastic element 7. Simultaneously, the guide rod 9 communicates with the inclined walls of the groove 11 and force the shank 4 cutter tip 3 to turn the wok is a threat to its longitudinal axis at some angle. This is achieved by forced rotation of the carbide of the working element 5, and hence his uniform wear, which greatly increases the efficiency of its work. After removing the load on the cutter under the action of the spring 7 returns to its original position.
Application of the proposed cutter allows you to reduce the cost of work done by improving the productivity of the working body tunneling and excavation harvesters
1. Cutter for mining machines comprising a shank with an axial channel, which can be rotated and limited axial movement of the anchor shank of the cutting tip and mounted in the axial channel between the end face of the axial channel and the shank of the elastic element, wherein the holder is made of at least one radial groove in which a fixed guide rod and the shank of the cutting tip is fitted rigidly connected with it by a sleeve, the protruding portion which is equipped with wear-resistant material, and the opposite part is made with an inclined groove for engagement with the guide rod holder.
2. Cutter for mining machines according to claim 1, characterized in that the wear-resistant material deposited on the outer surface of the sleeve in the form of inclined strips, arranged in a checkerboard pattern.
SUBSTANCE: cutting tool for mining machines includes holder with axial conical channel where there fixed is a shank of cutting tip formed by some close-ended symmetrically arranged fixing elements with conical operating part. Hard-alloy elements are done in a form of central stem of conical shape and blades. The blades have trapezoidal form in vertical plane, the larger base of which is oriented towards the holder, and are installed between fixing elements surfaces facing each other flush with their outer surface, note that there is an annular bore in the lower end of the holder and blades' upper ends have projections arranged in annular bore of the holder.
EFFECT: reduction of hard-alloy consumption and increase of cutting tool efficiency by excluding the possibility of worn cutting tools fragments getting under the other cutting tools.
2 cl, 3 dwg
SUBSTANCE: cutter includes cylindrical holder and working head with conical part equipped with button insert and reinforced element in the form of hard-face rings between which rings made from material of lower hardness and interacting with them are located. Cutter is provided with frame installed on working head so that it can be rotated; at that, hard-face and intermediate rings are installed on the frame. As per the first version, intermediate rings are provided with slots throughout the height, and edges of hard-face rings contacting with them on the side of their bigger base are provided with projections arranged in slots of intermediate rings. As per the second version, contacting edges of hard-face and intermediate rings are provided with congruent projections and cavities having the shape of sine curve in front plane.
EFFECT: improving cutter operating efficiency.
3 cl, 2 dwg
SUBSTANCE: cutter for mining machines includes holder with axial channel in which a set of wear-resistant elements in the form of external and internal cores is fixed; working heads of the above cores face one and the same side. Shank of each external core is provided with mating conical groove relative to working head of internal core. Rear part of shank of external core can be made from less wear-resistant material in comparison to head part.
EFFECT: reducing hard alloy consumption and improving cutter operating efficiency.
2 cl, 1 dwg
SUBSTANCE: composite cutter includes holder and replaceable working head with hard-alloy insert, which is arranged on its front part. Cylindrical cavity is made in rear end surface of replaceable working head in order to fix component parts. Replaceable working head has the possibility of free rotation relative to the holder about its longitudinal axis. It is retained against movement along that axis with locking member made in the form of radial projections on side surface of front holder part. Annular groove is provided in the cavity of replaceable head for its free rotation, and the corresponding slots are made for the holder projections to enter that groove. Replaceable working head is retained against falling out, when holder projections coincide with longitudinal slots, with a setting screw. Screw is screwed into threaded hole drilled in side surface of the head and covers one of longitudinal slots.
EFFECT: improving maintainability of the design, which is related to replacement of worn-out working part of the cutter.
2 cl, 3 dwg
SUBSTANCE: shank-type cutter with base part includes shank; at that, shank carries the top of cutter made from hard-alloy material, and base part in the zone between shank and cutter top has the receiving section in which the head part is retained. Head part includes circumferential surface for removal of the cut material, which converges in the direction of the cutter top. At that, as per the first version, the head part is retained relative to the base part with possibility of being turned, and surface for removal of the cut material ends in the area of the base part end receiving the cutter top. As per the second version, head part has limit stop (support section) and/or mating surface, which restricts the erection movement of the head part on base part on support surface of the base part. As per the third version, base part has a clamping sleeve in the area of the shank. At that, head part is put on clamping sleeve, and at that, head part retains the clamping sleeve in pre-load position.
EFFECT: reducing the costs for elements at optimised wear.
12 cl, 4 dwg
FIELD: mining equipment.
SUBSTANCE: the invention relates to rock-cutting equipment, in particular, to rock cutters for tunneling and getting machines. The cutter includes cylindrical holder and the operating head with conic section fitted with hard-alloy insert and reinforcing element in the form of hard-alloy rings with ring made of less dense material between them. The operating head of the cutter is has a rotating box with side conic surface on the side of hard-alloy insert, which is installed on the holder. Furthermore, the hard-alloy rings and ring spacers are fixed on the box, their contacting faces have spline keys and corresponding slots, and the side conic surface is fitted with spiral or inclined blades, reinforced with wear-proof material.
EFFECT: increased operation effectiveness through increasing operation capacity of ring spacers.
2 cl, 3 dwg
SUBSTANCE: tail drilling bit includes head of bit and shank of bit; at that, shank of bit is equipped with clamping sleeve in which shank of bit is fixed in the direction of its longitudinal axis by means of captive coupling and has the possibility of free rotation about its longitudinal axis. Clamping sleeve is equipped with fasteners which are engaged with circumferential slot of attachment section of the bit shank so that clamping sleeve is retained so that it can be rotated, however with captive coupling in axial direction of the bit shank. The latter has shank elongation on its end facing from the bit head; at that, the above shank elongation has tool location element. The latter is accessible through intermediate area of shank elongation in the bit axial direction, which is shifted backwards (retracted) relative to external surface of the bit shank and/or relative to external surface of clamping sleeve.
EFFECT: simpler erection and removal of the bit through mounting hole for the bit attachment.
10 cl, 2 dwg
SUBSTANCE: group of inventions relates to the field of mining and construction, in particular, to rotary cutting tool, which may be used to pierce through thickness of soil. Rotary cutting tool includes body, which has axial front end and axial back end, and also axial length. Hard tip, which has remote end, is fixed to body of cutting tool at its axial front end. Body of cutting tool has a section of back surface, arranged along axis behind remote end of hard tip, and having transverse dimension. Section of back surface includes axial front transverse dimension and minimum transverse dimension, which is located along axis behind axial front transverse dimension. Axial front dimension exceeds minimum transverse dimension. Section of back surface has axial length within the limits from approximately 10% to 35% of axial length of cutting tool body.
EFFECT: improvement of rotary cutting tool, to reduce extent of resistance of rotary cutting tool when piercing through soil thickness, with small angle of separation.
32 cl, 9 dwg
FIELD: machine building.
SUBSTANCE: cutter consists of cutting point made out of silicon-carbide diamond composite and of case made out of metallic material. Also material of the case possesses higher coefficient of thermal expansion, than composite of the cutting point. Notably, the cylinder part of the point and internal surface of the case cavity of the cutter have coating. Heated metal, able to combine with any coating, is introduced into a circular cavity formed between the cylinder part of the point and a wall of the case cavity, thus fixing the point in the case. Upon successive cutter cooling, the case shrinks exerting sufficient pressure on solidified metal and presses it to cylinder external surface of the point.
EFFECT: upgraded strength of fixing cutting point in case of cutter.
19 cl, 2 dwg
SUBSTANCE: invention is related to the field of mining and construction, in particular to method for manufacturing of rotary cutting tool body, which is a component of earthwork machine. Method for manufacturing of cutting tool body includes provision of stock material, having axial front end, and simultaneous arrangement of seat by cold stamping in axial front end of stock material and stripper groove in back axial location of seat.
EFFECT: increased strength of cutting tool body without mechanical treatment to reduce amount of raw materials required to manufacture rotary cutting tool.
2 cl, 9 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 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.
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.
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
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
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.
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
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