Method of orienting, assembling and locking of thrust tool in holder by self-locking retainer with help of low-wear orienting bushes and controlled low-wear thrusts
FIELD: process engineering.
SUBSTANCE: invention relates to fitting and locking of rotary thrust tool in its holder. Proposed method consists in fitting and locking the cutter in holder by self-locking retainer. Said retainer exploits the steel spring effect and combination of the angles of bevels that retain said retainer in holder seat. Low-wear controlled bushes and thrusts take up major force at cutting and prevent jamming of the cutter in holder.
EFFECT: maximized service life.
Method orientation, installation and fixing of the rotary thrust of the tool in the holder captive locking element clamp using reusable malaysiacialis orienting bushings and adjustable malaysiacialis stops.
The invention relates to the mining industry and can be used in mining, road, tunnel boring machines in the production of tunneling, mining, road construction works.
Known cutting clove mining machine (1) (UK application No. 1117694 declared 09.06.66,), in which the cylindrical shank of the tool with circular grooves under the locking cotter pin, cotter pin holds the tool holder of the machine.
The main disadvantage of the cutting tool is accelerated abrasive wear of the holder and the tool, which does not allow the tool to reliably Orient the axis of the cutting, to ensure reliable rotation and tool life, leads to jamming of the tool and its breakdowns and, consequently, to increased consumption of tools and holders, as well as to large financial costs associated with the replacement of the tool holders, and also with the cost of repair work units (machines).
Another significant disadvantage is the vulnerability sportowego ele is enta from wear on the holder, consequently, there is a high probability of loss of the cutting tool during operation and increased consumption of time when it is installed in the holder.
Increased wear of the tool and the holder of known construction due to the absence of means for preventing a negative impact on the accuracy of the orientation of the tool relative to the axis of rotation, and changes of cutting angles during operation. Known design tool and method of attachment does not exclude the ingress of waste material in the zone of rotation, do not exclude the possibility of the loss of the instrument, jamming it into the holder, uneven and excessive wear of the tool and holder, and do not contribute to the reduction of friction forces in the holder, resulting in the release of the tool from damage and premature wear.
Known also US patent No. 4343516 August 10, 1982, the disadvantages of which are the following factors:
- tastybaby landing pocket cutter, and consequently, its bad rotation;
- lack of accurate orientation of the cutting edge of the cutter, as the orientation of the cutter via the removable holder, which does not ensure an exact positioning relative to the base substrate at the Executive body of the machine;
- used in the construction of the ball, the emphasis does not preclude axial stake is to be cutter, and therefore, does not provide a clear orientation, affect the durability of the cutter at work and wear;
- the locking element does not provide a rigid secure the cutter in the holder, it is subjected to zastarovje, and the cutter additionally plays the role of a stopper for retaining the holder in the substrate, which makes construction of the lack of sufficient stiffness.
Therefore, this invention can not be a prototype of the proposed option.
The present invention is to provide a process orientation, install and secure the tool in the holder or other instrumental mechanism that eliminates all of these disadvantages of the known constructions and allowing to greatly increase tool life, to protect the holder from wear and tear, remove from design all the elements that contribute to the increase of friction, as well as to facilitate the installation and replacement of worn-out tool, to significantly improve the efficiency and durability of machines, as well as to improve the comprehensive performance properties of mechanisms and machines.
A variant of this method is proposed for consideration by the example of operation of the tool Assembly mining machines.
The technical result is obtained when applying the present invention lies in the substantial increase in SRO is and service tool holder, as well as the entire Executive body of the machine, greatly reducing the number of the tool used in the production of the work, reducing the time for tool replacement and increase of productivity of work performed, by increasing the efficiency of the tool, i.e., increasing its resource several times.
The technical result is achieved because the present invention uses a rotary, hard tool, held from falling out of the holder (POS.2, figs.1) captive locking element (Fig.5)made of spring tempered steel, which is only one point of contact with the annular groove of the tool, providing the minimum resistance to rotation of the tool in the holder, and his departure and the angles of cut. Size springy groove H of the stopper element is greater than the difference between the small (d) and large (D) diameter latch H>(D-d)/2.
The locking element from falling out is held in a pocket of the holder of Fig.7, is made in the form of three cylindrical, symmetrical relative to the axis of the latch surfaces interconnected by means of the fixing chamfers, angles, fixing α, intended for fixing the locking element in the holder, are selected within 28-60°. The locking element can be installed with either the side pocket. To ensure the speed and reliability of mounting of the retainer mating surface of annular groove of the tool and fixing the cylindrical surface of the pocket of the holder into each other at a value not greater than 1/3 to 1/2 of the size of the diameter of the cylindrical surface of the retainer, at an angle of 90° relative to each other, making it easy to install self-adhesive clip in your pocket, providing a reliable fixation of the instrument. For mounting and Dismounting reusable latch in the pocket of the holder, a cylindrical rod, whereby the latch is installed in the pocket of the holder, resting on a facet pocket and fixures in it. The optimal size of the angles "α" fixing chamfers pocket holder is selected depending on the required stiffness systems herd management of the locking element.
The dimensions of the locking element are selected in accordance with the dimensions of the held tool and holder in the area of the pocket.
For precise orientation of the cutting tool in the holder, eliminating the possibility of jamming or significant difficulties of rotation of the tool due to distortions or backlash, the invention uses malaysiashawna made of metal or durable hardened steel bushing (Fig.1 POS.7), to which tectorum support surface of the tool and provides precise positioning of the tool, the thickness of the sleeve is selected when the trap setting of the holder, providing the necessary overhang of the tool and the corners of his cutting, fastening sleeve is adhesive or a threaded manner. The second positioning element used in this invention, is adjustable thrust element, Fig.3 POS.4, mounted by threaded connection in the tool holder which receives significant end and axial loads, clearly orients the tool holder relative to the axis of rotation of the cutter, providing them with a reliable rotation when cutting and wear evenly. Bearing surface of the thrust element made of a carbide material or of metal and serves as a thrust bearing and precisely mates with the bearing surface of the cutter, adjustable thrust element carried on the stand by screwing-unscrewing followed by cerite-top in the area of the thread.
Support surface malaysiakuala bushings and thrust element can be executed in the form of a conical or spherical surface, internal or external, but it is allowed to use and the cylindrical surface at the considerable dimensions of the tool.
To ensure the protection zone of rotation and fixation, the present invention provides the use of a felt ring the lake.6 of Fig.2, which is guaranteed to overlap the gap between the cutter head and the holder, providing the missing waste material in the zone of rotation, eliminating tastebook.
Felt ring is located in the area maloznachimo sleeve, the thickness of the ring is larger than the gap between the head of the tool and holder. Felt ring attached to the end of the holder adhesive composition, so as not to interfere with the quick tool replacement.
For added protection, landing slots of the tool holder from tastybaby, into the pockets of the holder for systems herd management clamps are rubber plugs POS.8 of Fig.6, is made of porous rubber.
The proposed method orientation installation and fixing of the tool proposed design can significantly improve the efficiency of the tool holder and the work efficiency of the whole machine. To reduce the cost of the tool, its cost, and to ensure the performance of works by increasing the efficiency of the power cutting tool in the optimal orientation and low wear, reduction in the consumption of time for tool change, the simplicity of its implementation, as well as a significant increase in the durability of regimes efficient cutting.
The inclusion in the design of reusable malozaselennyj elements located the area of the holder and not samenaide during the entire lifetime of the holder, unlike traditional tool allows to increase the efficiency of the new thrust of the tool that uses this method (orientation, installation and fixing) in its design. This method allows all of the components associated with the operation of such a typical rotary tool to gain significant advantages in durability, reliability and efficiency of its use.
Sources of information
1. UK application No. 1117694, Appl. 09.06.66,, published. 19.06.68, MCI IS 35/18.
Priority application No. 464370 16.06.65,, US.
2. The US patent No. 4343516 from 10 Aug. 1982
Method orientation, installation and fixing of the rotary thrust of the tool in the holder, consisting in the installation and fixing of the cutter from falling out of the holder through systems herd management retainer-latch, which uses spring steel effect and the combination of the angles of the chamfers holding the locking element in the pocket, provides constant and accurate positioning of the cutter in the cutting process and the minimum resistance to its rotation, and maloiznoshennye adjustable sleeve and stops, sensing the main power load when cutting, ensure even wear of the cutting head of the chisel against it jammed in the holder and ensure maximum longevity of the work holder and dir is the future of the tool road and mining machinery.
SUBSTANCE: cutter for driving and cleaning and cutting machines comprises a holder with a shank, a reinforcing hard-alloy insert having front and rear faces of sharpening, a cutting edge having a semi-circular convex shape. According to the first embodiment, the front face of sharpening of the reinforcing hard-alloy insert is made of semicircular convex shape, and the rear face - of plane-concave shape. According to the second embodiment, the front and rear faces of sharpening of the reinforcing hard-alloy are made of semicircular biconvex shape.
EFFECT: increasing productivity of the working bodies of driving and cleaning and cutting machines, reduced wear of the reinforcing hard-alloy insert of the cutters.
5 cl, 10 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to cutting tools. Particularly, it relates to radial cutter of header, header and method of cutter production. This cutter comprises shank, head and insert. Said shank features out-of-round cross-section. Said head comprises point area remote from shank and lateral surfaces connecting the front and rear surfaces. Insert is arranged at the point front end. Said insert has body made of tungsten carbide and element made of superhard material. The latter extends into said body and fused therewith. At least a part of superhard material element is exposed at insert cutting surface. At least a part of head front surface is made of superhard material and spaced from the element made of superhard material.
EFFECT: better tool characteristics.
22 cl, 34 dwg
SUBSTANCE: tool includes a housing and a hard-alloy insert that is fixed on the housing. The insert includes a head part, an intermediate part, a base and a shank. Intermediate part of the insert, and/or its base represent a stepped pyramid-shaped body, the stages of which are made in the form of regular right-angle prisms and/or prismatoids.
EFFECT: optimisation of geometrical parameters of a hard-alloy insert.
10 cl, 8 dwg
FIELD: oil and gas industry.
SUBSTANCE: tool (2) for ground breakage and extraction contains body (4), support surface (12) at working end (8) of the case including cavity (14) and side walls (16), insert (20), with tip (22), wedge-shaped face surface (26), lateral surface (28) and transitional edge (30) at crossing of face surface (26) and lateral surface (28) and ring (40) located radially outside protruding side walls (16). Transitional edge (30) and the most axially protruding surface (18, 42) along the axis of each side walls (16) and ring (40) are made as step-shaped backward configuration. The most forward and axially protruding surface (42) of the ring (40) is placed at axial distance D from tip (22) of the insert (20), while the most backward and axially protruding surface (56) of the ring (40) is placed at axial distance d from tip (22) of the insert (20), at that ring (40) is the most radially remote area of the tool (2) within interval D-d, at that the most backward and axially protruding surface (60) of the insert (20) is placed at axial distance L from tip (22) of the insert (20), where 0.5L≤D≤0.9L, preferably 0.5L≤D≤0.8L. Invention also describes machine for material extraction with installed tool (2) for ground breakage and extraction and method of tool (2) manufacturing.
EFFECT: increasing service life of tool.
13 cl, 4 dwg
SUBSTANCE: pick or earth-moving tool comprises a body, a support surface, comprising a cavity and axially protruding side walls, an insert fixed in the cavity, comprising a tip, a cone-shaped front surface, a side surface and a transition edge at the crossing of front and side surfaces, and a ring arranged radially outside the protruding side walls, made of a more solid material compared to the body. The axial position of the transition edge and the axial position of the axially most front surface of side walls are substantially identical, at the same time the axially most rear surface of the insert is arranged at the axial distance L' from the insert tip, and the axially most front surface of the ring is arranged at the axial distance D' from the insert tip, where 0.5L'≤D'≤0.9L', preferably, 0.5L'≤D'≤0.8L'. The transition edge and the section of the cone-shaped front surface may be arranged inside a ballistic contour formed by the insert tip, the radially most external section of the axially most front surface of side walls and the ring.
EFFECT: invention provides for operation of a tool under heavy conditions, extended service life of a tool, and reduction of tool blunting to the minimum for improved operational characteristics.
13 cl, 7 dwg
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
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
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