Carbide tipped rotary cutting tool
(57) Abstract:Usage: mining industry, particularly the manufacture of cutting tools for mining and road machines. The inventive carbide tip contains cutting, cylindrical flange and the supporting part. On the conical surface of the support part are two groups of tabs. The ratio of the diameters of the circles, which are the corresponding groups of protrusions, is 1.3 to 1.5. On the cylindrical surface of the flange part are centering elements. The tabs are displaced relative to each other around the circumference. 1 C. p. F.-ly, 2 Il. The invention relates to the mining industry and can be used in the manufacture of cutting tools for mining and road machines.Known carbide tip used in cutting tools for road machines containing cutting, cylindrical, flanged and tapered bearings  On the conical surface of the supporting part of the famous carbide tip made evenly spaced around the circumference of the spherical protrusions, which allows you to create a uniform gap between the two designed the aqueous seam on the entire surface of the solder joints.However, a small area of the soldered connection of the tip and body of the cutting tool, which includes only the surface of a truncated conical protrusion and the lower end surface of the flange part, reduces the resistance of the tip of the fracture, despite the constant thickness of the solder joint. This is because the absence of the solder joints of the carbide tip and the tool body along the perimeter of the cylindrical surface of the flange portion of the tip causes arising during operation of the tool, the moment of forces is the cause of the breaking of the carbide tip of the socket body with little effort cutting. Ultimately, the service life of the carbide tip ends long before the moment of its full depreciation, which significantly reduces the efficiency of cutting tools in General.Known carbide tip for rotary cutting tool, which is taken as a prototype, containing cutting, cylindrical flange and the supporting part 
On the conical surface of the supporting part of the tip is made evenly spaced around the circumference of the protrusions that when installing the NAC is e, thus providing the correct relative positions of the tip and the tool body before soldering.The presence of solder joints known tip and tool body along the perimeter of the cylindrical surface of the flange portion of the tip can significantly increase the area of the soldered seam and thereby to increase the strength of the connection.However, the location of the tabs on the conical surface of the reference part of the famous tip circle of the same diameter, and therefore, the contacting of the tip and the tool body at points corresponding to the location of the projections, focusing the shock load on the tip and the tool body when in the local area, limited by the diameter of a circle, but which are protrusions, and does not allow you to evenly distribute the load across the supporting conical surface of the solder joints, which affects the strength properties of the tip, which determines its performance. The tool life is also reduced by the presence in the socket housing of the tool ring grooves, with which the contact protrusions of the tip, which, by its nature, the concentration of the aqueous tip is not sufficient for rigid fixation of the tip in the socket housing of the tool with the aim of placing it relative to the axis of the tool and the lack of bias in terms of automating the process of soldering.The purpose of this invention is the creation of a carbide tip for rotary cutting tool of such construction that would ensure the elimination of the typical tips known constructions defects while improving performance properties of the proposed tip.The technical result is achieved by the fact that the carbide tip rotary cutting tool containing cutting, cylindrical flange and the supporting part, on the conical surface of which the last made group of projections of the same height, evenly spaced on a circle of diameter d1according to the invention, the conical surface of the base portion of the tip is provided with additional projections of the same height, evenly spaced on a circle of diameter d2and the cylindrical surface of the flange portion of the tip is provided with evenly spaced around the circumference of the centering elements have the same height, with the tabs around the circumference of diameter d2shifted in the circumferential direction relative to the tabs, located on a circle of diameter d1that ocher is istihaada the that the ratio of the diameters of circles d1and d2where there are groups of protrusions, amounts to 1.3-1.5.In Fig. 1 shows a carbide cutting tip of Fig. 2 - rotating cutting tool with carbide tip Assembly.Carbide cutting tip 1 according to the present invention includes cutting 2, a cylindrical flange 3 and the support 4 pieces. The cutting part 2 of the handpiece made in the form of at least two mating surfaces, providing in shape fast break tip when cutting and sufficient strength when subjected to shock loads. The cylindrical surface of the flange portion 3 of the handpiece contains evenly spaced on its periphery a longitudinal centering elements 5 of the same height, providing fixation of the tip in the socket housing relative to its axis and the absence of bias in terms of automating the process of soldering. The supporting part 4 of the handpiece is made of the mating conical and truncated spherical surfaces, providing additional stability to the tip in the body of the tool and increasing the area of the solder joints. The conical surface of the support frequent is winetech different diameters d1and d2. While the protrusions 6, located on a circle of diameter d2shifted in the circumferential direction relative to the projections 6, which are located on the circle with diameter d1which in turn shifted in the circumferential direction relative to the centering elements 5. This arrangement of the projections 6 and the centering elements 5 relative to each other facilitates wicking of solder in the soldering process in the gap between the surfaces of the tip and the tool body, and the protrusions 6 and the centering elements 5 of the same height allows you to create the conditions for receiving the solder seam guaranteed constant thickness over the entire surface of the solder joints. The location of the projections 6 on the conical surface of the supporting part 4 of the tip in circles of different diameters is dictated by the need to evenly distribute shock loads acting on the carbide tip at the contact points of the projections 6 with the surface of the socket tool. However, in order to achieve the maximum effect of the distribution of loads across the surface, the ratio of the diameter d1the circle, which is one group of tabs, to the diameter d2the circle, which is another g is a significant reduction effect associated with the approach of the two groups of tabs relative to each other and the concentration of impact loads in the local area, limited by the diameter of the same circle, similar to the known structure  which affects the strength properties of the tip. The increase in the ratio of diameters of more than 1.5 will entail structural changes of the tip, which will be reflected either by weakening its mechanical properties when working on the slice, or the increase of metal.Use the carbide tip cutting tool according to the present invention will increase the life and durability of the tool by improving the operational characteristics of the tip aimed at increasing the strength of the design, and also facilitates the automation process of the soldering tip and the tool body. 1. Carbide tipped rotary cutting tool containing cutting, cylindrical flange and the supporting part, on the conical surface of which the last made group of projections of the same height, evenly spaced on a circle of diameter d1, characterized in that the bevel on the located on a circle of diameter d2and the cylindrical surface of the flange portion of the tip is provided with evenly spaced around the circumference of the centering elements have the same height, with the tabs around the circumference of diameter d2shifted in the circumferential direction relative to the tabs, located on a circle of diameter d1which in turn shifted in the circumferential direction relative to the centering elements.2. The carbide tip under item 1, characterized in that the ratio of diameters of circles d1for d2where there are groups of protrusions, is 1.3 to 1.5.
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
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
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
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
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.
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
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.