Grinding and polishing (B24)

B24            Grinding; polishing(17530)
ethod of producing composite diamond-containing matrix with increased diamond holding based on hard-alloy powder mixes // 2607393
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of diamond tools based on hard-alloy powder mixes. Method of producing a diamond-containing matrix of a diamond tool involves preparation of a hard alloy powder mix, its plastification, in-layer filling the prepared charge and placing diamond grains with a shell of chromium particles into a metal mold, molding the charge with diamond grains into a briquette and sintering the briquette in the furnace with a low-melting metal or alloy in the direction from the bottom to the top. Diamond grains are used with the shell of a uniform layer of chrome particles with the thickness of not less than 5 % from the minimum linear size of diamond grains produced by fixing a plasticized powder of chrome on the surface of diamond grains with subsequent drying. Sintering the briquette in the furnace is performed by heating first for 60–90 minutes up to the temperature of 600 °C, then for 60–70 minutes up to the temperature of 860–1,000 °C, after that up to the temperature of 1,100 °C with provision of thermodiffusion metal coating of the diamond grains with chromium.EFFECT: provided is reduced consumption of diamonds due to increased strength and reliability of diamond grains fixing in the tool matrix, as well as higher resistance of the diamond tool.3 cl, 1 dwg
anual abrasive tool for sharpening cutting edges // 2607392
FIELD: manufacturing technology.SUBSTANCE: invention relates to manual abrasive tools for sharpening cutting edges of tools. Manual abrasive tool comprises a shoe, an attached thereto sheet abrasive material, two assemblies to clamp the sheet abrasive material, an assembly to tension the sheet abrasive material and attached from below to the shoe shock-absorbers and a plate. Plate is placed in the central part of the shoe. At one end of the shoe there is a solid cutout throughout the length of the end located in its upper part, in which there is one of said clamping assemblies. On the opposite end of the shoe there are two solid cutouts throughout the length of the end, one of which is located in its lower part and accommodating the second of the said clamping assemblies, and the second cutout is placed higher than the first one and accommodates the said tension assembly. Plate thickness is 2–3 mm less than height of the shock absorbers. Sheet abrasive material used is a coated abrasive on a fabric base.EFFECT: provided is higher quality of sharpening a manual abrasive tool.1 cl, 15 dwg
Floor grinding plant // 2607294
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for floor treatment. Device, intended for its use with floor grinding device and made preferably in form of combined machine or floor conditioning machine, comprises processing tool, made with possibility of rotation and which is porous flushing, polishing and waxing disc and grinding tool made in form of diamond disc, connected to processing tool with possibility of detachment. Possible is processing using several identical diamond discs, symmetrically located and connected with processing tool with possibility of detachment, Provided is fastener for connection of grinding tool with processing tool, made in form of attachment frame installed from processing tool opposite sides, resting on its front surface, and auxiliary frame resting on its rear surface.EFFECT: result is that device has simple and effective design providing possibility of fast and reliable connection of grinding tools.10 cl, 6 dwg
High-efficiency cutting and grinding wheel, preserving shape // 2607062
FIELD: technological processes.SUBSTANCE: invention relates to abrasive processing and can be used in making non grinding wheel, intended for cutting and grinding of forming wheel. Grinding wheel comprises a base consisting of support plate with central hole for installation on the shaft and annular clamping plates connected by means of bolts, installed in bearing bushes between said plates. There is an abrasive ring secured between plates of the base, installed so that an annular channel for coolant inlet and annular cavity for filling with coolant, connected with outer surface of abrasive ring holes for discharge of cooling agent.EFFECT: reduced deformation of the grinding wheel and higher efficiency and quality of preform surface treatment.5 cl, 5 dwg
ethod for diamond-electrochemical polishing // 2607060
FIELD: metal processing.SUBSTANCE: invention relates to combined methods of processing, combining mechanical and electrochemical action on machined workpiece, and can be used in diamond-electrochemical polishing of parts made from hard steels and alloys. Grinding is performed with a rotating diamond wheel on metal binder with activation action on interelectrode interval. Activating action is performed by applying alternating ultrasonic vibrations in low-frequency and medium-frequency ultrasonic ranges, wherein low-frequency range is selected from range of 15–50 kHz with intensity of 2–5 W/cm2, a medium-frequency range within range of 100–300 kHz with intensity 0.5–5 W/cm2.EFFECT: increased resistance of diamond wheel, higher quality and efficiency of processing.3 cl
ethod of filling structural elements of composite grinding wheel with grease // 2606675
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used in making composite grinding wheel discs (CGD). Method comprizes filling of its structural elements with solid lubricant (SL) and removing excess of SL from disc surface. Before filling preparation, dosing and mixing of SL components is carried out and introduction into the mixture during its preparation of fluorescent powder in an amount equal to volume content in the mixture of SL components . Before filling of each structural element of the grinding wheel disc with the prepared mixture control of uniformity of distribution of components in SL by illumination by UV light is carried out. At uneven distribution of components in SL said mixture is further mixed and controlled.EFFECT: as a result higher quality of grinding surfaces and reduced labor intensity for manufacturing of CGD is received.1 cl
Braking device for process machine // 2606353
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used in portable manual technological machines. Braking device comprises at least one brake assembly intended to, create in the position of braking of brake force at least partially convert one relative motion between driving element of brake unit and brake unit braking element in another relative motion between driving element and brake elements. In braking device at least one moving unit is provided at least to, at least in one working state to displace brake element in the direction of driving element generate force component acting in direction of driving element.EFFECT: as a result, reliable transfer of brake unit in unconstrained position is enabled, as well as spontaneous separation of braking device elements is eliminated.10 cl, 8 dwg
ethod of hollow cylinders processing // 2606145
FIELD: machine building.SUBSTANCE: invention relates to hollow cylinders processing. Drilling hole with spiral drill. Performing hole mandreling according to compression pattern with tension equal to not less than 5 % of its diameter, by means of single mandrels with increasing diameter successive pushing. Removing metal beads at cylinders ends and performing their axial plastic compression with deformation degrees of 0.5…1.5 %. Performing additional mandreling of hole according to compression pattern with tension, equal to 1 % of its diameter by one tooth mandrel pushing.EFFECT: result is reduction of residual stresses in hollow cylinders.1 cl, 2 dwg, 1 tbl
ethod of grinding // 2606143
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing and can be used in machine building, instrument-making for preliminary and final grinding of parts made from various materials. When grinding, tool used has two grinding wheels – coarse and fine, and preliminary and final processing of part is performed. First wheel is used to perform preliminary processing and is located between front support spindle of tool and fine wheel, and second is used for finishing, and is placed in front of coarse wheel. Diameters of grinding wheels are selected based on a given relationship.EFFECT: providing simultaneous preliminary and final processing of parts without replacement of grinding wheel, and achieving low roughness and high geometrical accuracy of processed surfaces.3 cl, 10 dwg

Vibration machine // 2605735
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for grinding, polishing and hardening of parts surface layer. Vibration machine comprises container, fixed on platform with vibrator and resilient installed on base. Insert in form of helical drum is mounted inside container and rigidly attached to its inner walls, mounted from sections assembled from two identical subsections, made of identical isosceles triangles even number, alternatively connected along subsection perimeter with four identical equilateral triangles with formation of small and large end holes in form of polygons. Two subsections are connected to each other by sides with end large holes. Sections are connected to each other along helical drum length by sides with small end holes with formation of multithread helical surface with broken screw lines. Throughout its helical drum length is truncated in upper part along line, parallel to drum axis of symmetry, for not more than one fourth of its part.EFFECT: result is expansion of machine process performances and higher processing intensity.1 cl, 10 dwg

Vibration machine // 2605734
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for grinding, polishing and hardening of parts surface layer. Vibration machine comprises container, fixed on platform with vibrator, and resilient installed on base. In container is mounted and rigidly attached to its inner walls, insert in form of concave shaped helical drum, made along perimeter from three and more variable-width concave curvilinear shaped strips, folded in vertical plane in lengthwise direction, bent along helical lines in transverse direction and bent along cuts with skewed walls in crosswise-lengthwise direction with formation along drum perimeter of directed towards each other broken helical lines and helical surfaces with variable pitch. Along its entire length helical drum is truncated in upper part along line, parallel to drum axis of symmetry, for not more than one fourth of its part.EFFECT: result is expansion of process performances and higher processing intensity.1 cl, 10 dwg

Coated abrasive tool // 2605721
FIELD: metal processing.SUBSTANCE: invention relates to abrasive treatment. Abrasive article consists of a flexible substrate having a base surface, containing the elastic polymer capable of elastic extension and transversal compression, the strip of elastic polymer is 5.1 cm wide, 30.5 cm long and 0.102 mm thick, elongation in longitudinal direction at least 3 % at 22.2 N static load; synthetic resin, in contact with the base surface and spread over all the base surface by preset pattern of the surface discrete zones, abrasive particles in contact with synthetic resin and as a whole in combination with it, and adhesive resin in contact with abrasive particles, as well as synthetic resin, adhesive resin is in combination with abrasive particles and also with synthetic resin, whereas the areas of the base surface in contact with synthetic resin, in general are located in one plane with areas of the base surface not in contact with the synthetic resin.EFFECT: technical result: abrasive article has excellent torsion, segregation, and load resistance, higher flexibility and lower materials-output ratio compared to common abrasive articles.20 cl, 2 tbl, 2 ex, 6 dwg

Hydro-abrasive treatment unit // 2605402
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for surface hydro-abrasive treatment of workpieces with holes and inner cavities, for example, gas turbine engines blades. Unit contains working chamber, drive and compensation device. Provided is piston with attached processed workpiece separating working chamber into two parts. Drive is made in form of hydraulic cylinder, connected with working chamber piston by rod. Compensation device is made with possibility of changing working chamber volume and comprises system of check valves and hydraulic lock. Piston in working chamber is installed with clearance relative to its inner wall.EFFECT: result is unit higher reliability and its simplified design, as well as higher efficiency of processing.1 cl, 2 dwg

Grinding machine with grinding spindle unit rotary support and method of grinding spindle rotation in grinding machine // 2605399
FIELD: machine building.SUBSTANCE: invention relates to machine tool building and can be used, for example, in grinding machines designs. On grinding machine receiving element (21), for example, on grinding head, grinding spindle unit (10, 27, 55) is installed with possibility of rotation around axis (26) of rotation. Grinding spindle unit carries driven grinding wheel (31), which can be installed at angle to processed part longitudinal axis using adjusting unit (33). At that, pressure bolt (34) is extending, turning grinding spindle unit rotation around axis (26) of rotation. Axis (26) of rotation is made in form of living hinge using bearing part (23, 60) targeted elastic deformation area. Tension spring device (38) provides constant contact of pressure bolt (34) with receiving element (21).EFFECT: invention increases accuracy of grinding wheel specified installation at angle during inclined or convex surfaces processing.14 cl, 12 dwg

Device and method for fibre-optic connector polishing // 2605055
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for polishing of optical fibre end at operation site. Device comprises body with main part to support polishing element and polishing plate containing with connector holder for receiving and holding of fibre-optic connector fixed at optical fibre end. Polishing gear is provided made with possibility to engage with ring gear located in main part. Polishing gear is installed into ring gear with possibility of rotational movement with provision of tracing on polishing element in specified position with optical fibre butt.EFFECT: optical fibre polishing process is simplified as a result.18 cl, 9 dwg

Resilient clamping device (versions) and method of arc strip plate segment abrasive electrochemical finishing // 2604275
FIELD: turbines.SUBSTANCE: invention relates to abrasive processing and can be used for arc strip plate segment electrochemical finishing, to be installed around turbine plant steam turbine rotor. Device to clamp said segment comprises concave support unit, detachable end units, made with possibility of installation on concave supporting unit opposite ends to enable attachment of first and last plates, and detachable face plates attached to concave supporting unit opposite sides. In space formed between said elements soft material is arranged, selected from group comprising rubber, polymer and foam. Provided are bracket for securing of plate segment in it and installation in said space and stabilizing plates for plate segment plates fixing. Disclosed also device version with convex supporting unit.EFFECT: higher quality of plate segment finishing due to reduction of its deformation.2 cl, 14 dwg

ethod of program control over flat deep grinding by wheel periphery // 2604088
FIELD: aircraft engineering.SUBSTANCE: invention relates to aircraft engineering and can be used for machining small length parts by depth grinding with a wheel periphery at forming control programs of treatment. Method involves treatment process control, where imparted is a longitudinal feed to the work table with a treated part and provided is a longitudinal feed rate of change at sections of cutting in and out of the grinding wheel divided into equal legs. Control over the treatment is carried out by maintaining a constant level of the second metal removal throughout the length of the treatment. Rate of longitudinal feed of the table with the part at the sections of cutting in and out of the grinding wheel is changed proportionally to the ratio of maximum depth of grinding at the section of cutting in or out of the grinding wheel to the actual depth of grinding at the end of each leg of the section.EFFECT: as the result provided is higher efficiency of parts treatment due to program control over the second metal removal.1 cl, 2 dwg

ulti-disc grinding tool head // 2604087
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used in pipeline valves gate unit sealing surfaces processing. Multi-disc grinding tool head comprises plate with working discs uniformly arranged along circumference kinematically connected with drive. Provided is wedge-shaped housing, on which sliding supports with conical gear wheels are attached. On latter by means of screws, spherical hollow support, strutted by faceplate feed spring, and brass locking washer two faceplates are fitted made with possibility of forced rotation from gear shaft. Said shaft is installed in connecting plate and guide, “based” by studs due to feed springs. On faceplates at least six working discs with abrasive cloths are installed by means of bearings.EFFECT: result is increasing pipeline valves seals processing quality and efficiency.1 cl, 3 dwg

Abrasive article having a non-uniform distribution of openings // 2603747
FIELD: technological processes.SUBSTANCE: invention relates to abrasive processing and can be used in making articles with abrasive coating intended for finishing and grinding articles surfaces. Article has a coating with apertures, arranged in compliance with controlled non-uniform distribution and forming spirals, selected from a group, comprising an Archimedean spiral, Euler spiral, Fermat's spiral, hyperbolic spiral, Fibonacci spiral, logarithmic spiral, golden spiral, or combinations thereof.EFFECT: increased grinding efficiency and surface characteristics of processed parts.17 cl, 59 dwg, 11 tbl, 10 ex

ethod of article made with surface recesses and ledges linear sizes measuring // 2603516
FIELD: metal processing.SUBSTANCE: invention relates to metal processing and can be used, for example, for measurement and control of articles with cylindrical or conical shape linear sizes and with surface recesses and protrusions on during grinding operations. Measuring method consists in using built-in into measuring rod and its tip fibre-optic converter (FOC) with fibre spiral twisting, acting as reflector with semitransparent face. Said converter is part of first optical transducer measuring channel, which enables to determine article surface position with subsequent calculation of its size in contactless measurements even in case of lubricant-coolant or its vapors presence. There is also possibility to measure tip and product temperature by second optical transducer and introduce temperature errors correction into product sizes measurement result.EFFECT: invention usage enables to expand measuring method technological capabilities, reduce requirements to optical system and simplify its design.4 cl, 8 dwg

Abrasive article for low-speed grinding // 2603515
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing. Abrasive article for grinding a working part containing metal, at the rate of less than 60 m/s, comprises an abrasive base containing a glass binder and microcrystalline aluminium oxide abrasive particles inside the binding material, abrasive base has a modulus of elasticity (MOE) in bending the surface of abrasive particles and binding material boundary, said modulus makes at least 225 GPa.EFFECT: technical result is upgraded operational characteristics of abrasive articles.15 cl, 2 tbl, 3 ex, 11 dwg

Systems and methods for grinding refractory metals and refractory metal alloys // 2602701
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing and can be used for grinding surgical needles made of refractory metal alloys. System comprises grinding wheel with grinding surface, layer of binding material made of nickel, deposited on grinding surface, and a plurality of abrasive particles embedded in layer of binding material. Abrasive particles have same size, and thickness of layer of binding material is about 65% of size of abrasive particles. Latter are particles of cubic boron nitride ABN600, having average size ranging from 20 to 40 mcm. Invention also provides a lubricating device for application of lubricant onto grinding surface and rotating element for rotation thereof.EFFECT: longer service life of grinding wheel and higher efficiency of grinding surgical needles.17 cl, 9 dwg

Abrasive particles having complex shapes and methods of forming thereof // 2602581
FIELD: technological processes.SUBSTANCE: invention relates to molding abrasive articles. Shaped abrasive particle contains a particle body having length (l), width (w) and height (h), herewith the body comprises a supporting end surface, a top surface and a side surface extending between the supporting surface and the top surface, herewith the supporting end surface is cruciate, and the top surface features a shape differing from the supporting end surface one. In another version the particle contains a body including the first layer having a first length and the second layer, which overlaps the first layer and has a length between approximately 50 % and approximately 90 % of the length of the first layer. In the third version the particle body contains a three-pointed star with three arms, wherein the second arm and the third arm form an angle which is less than 180°, and the main part has a coefficient of bending, which is not more than 10, defined as the ratio between the highest height (ht) of the main part in one tip of the arm and the minimum height (hi) of the main part in the inner area. In the fourth version the main part of the particle contains a four-pointed star with four arms extending from the central part and with a coefficient of bending, which is not more than 10.EFFECT: improving performance characteristics of abrasive articles and their service life.30 cl, 3 ex, 69 dwg

Portable tool with pivoting handle // 2601979
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used in handheld processing machines. Machine comprises a first handle for gripping by first hand of user, a second handle for gripping by second hand of user, at least one coupling for connection to flexible hose and actuating lever. Second handle closes at least part of coupling is connected with actuating lever and mounted with possibility of rotation, wherein if second handle is in turned position it blocks actuating lever in off position.EFFECT: enabling processing of surfaces when machine is gripped with one or both hands, which increases its manoeuvrability.14 cl, 5 dwg

Tool chucking device // 2601716
FIELD: machine building.SUBSTANCE: invention relates to a tool chucking device, especially an oscillation tool chucking device. Chucking device comprises at least one chucking unit which has at least one chucking element for clamping a treatment tool in an axial direction, extending along spindle of process machine, having at least one control unit for acting on chucking element. Control unit has a control member configured for rotation and made in form of lever (36). Device is equipped with at least one conversion unit for changing gear ratio depending on at least one component of motion of control member of control unit so that force applied to lever for turning thereof, remains virtually constant at angle of opening of lever.EFFECT: technical result consists in ensuring smooth movement of rotary lever of control member.10 cl, 7 dwg

Device for grinding casting product // 2600769
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy. Device for grinding continuous casting product (1) comprises at least two grinding tools and holding device (8). Holding device is designed to hold continuously cast slab in horizontal and vertical positions (I, II) and hold slab in said positions when grinding. After grinding first two opposite sides of slab, held in one position, slab is turned, clamped in second position and second two opposite sides are ground.EFFECT: enabling movement of slab into required position and stable holding thereof during grinding.11 cl, 15 dwg

Bonded abrasive article // 2600464
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing and can be used in making bonded abrasive article, consisting of shaped abrasive particles and bonding medium. Each of said abrasive particles has front and rear side and has thickness t between them. Said front side is a front surface with perimeter geometrical shape. Thickness of particles is equal to or less than the length of the short side of the geometrical shape of particle.EFFECT: result is high-efficiency grinding workpieces.10 cl, 6 dwg, 17 tbl, 9 ex

Device for magnetic-abrasive processing // 2599765
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used for magnetic-abrasive processing. Device contains magnetic systems with inductors, located opposite each other with possibility of displacement along three mutually perpendicular axes of coordinates and turn at angle of 360° around each of these axes, assembled of alternating permanent magnets and magnetic conductors and fixed on shafts of electric motors. Each of magnetic systems is equipped with inner and outer limiting cups, made with possibility of free rotation about axis of motor shaft and extension of their sides above working surface of inductor by value, equal to working gap between working surface of inductor and surface of machined part.EFFECT: higher quality of processing part surface.1 cl, 7 dwg

Composite abrasive wheel // 2599067
FIELD: technological processes.SUBSTANCE: invention relates to abrasive processing and can be used in making composite abrasive wheels. Latter comprises primary abrasive part including moulded ceramic abrasive particles connected with primary organic binder. Primary abrasive part additionally includes diluting crushed abrasive particles corresponding to installed rated markings in abrasive area. Provided is opposite to front and related to it secondary abrasive part including secondary crushed abrasive particles connected with secondary organic binder. Primary abrasive part contains more in volume ratio of shaped ceramic abrasive particles than secondary abrasive part.EFFECT: higher wear resistance of abrasive wheel.15 cl, 4 dwg, 3 tbl, 2 ex

Device for cutting inserts // 2598741
FIELD: technological processes.SUBSTANCE: present invention relates to devices for cutting inserts from a mat of an insulating material by means of blasting. Device comprises jet nozzles with motor drives, a transport path for continuously transporting the mat and two guides, which are located at some distance from each other in direction of mat transportation and are provided to support the jet nozzles. Jet nozzles can move independently along the guides. Said water jet nozzles are associated with another additional guide provided to support another water jet nozzle that can move along the additional guide. Additional guide can be moved by a drive parallel to the direction of the mat transportation.EFFECT: to increase the cutting efficiency and accuracy.9 cl, 5 dwg

ethod of making part by forging // 2598412
FIELD: technological processes.SUBSTANCE: invention relates to production of parts by forging. Method involves measurement of geometric characteristics of forged parts, comparing measured geometry with preset geometry and detection of defective zones, which do not correspond to given shape. Then, polishing of defective zones by removing required thickness of material by means of controlled abrasive tape taking into account at least one parameter describing wear of abrasive tape during polishing of previous defective zones.EFFECT: improved geometrical characteristics of produced part.9 cl, 5 dwg

Belt-polishing machine for finishing // 2598409
FIELD: machine building.SUBSTANCE: invention can be used for finishing of curved surfaces of different curvature on belt-polishing machines. Machine comprises motor and connection support. Central part of support is rigidly connected with motor output shaft. Around connecting support there are several independently rotating support finishing wheels, which curved surface of rim of each has different curvature. Finishing wheels on connecting support are distributed along one circumference with centre on motor output shaft. Connection support is driven by motor rotation to press one of finishing wheels on connecting support to polishing machine abrasive tape.EFFECT: result is efficient continuous workpiece finishing with different curvilinear surfaces.19 cl, 13 dwg

ethod of producing matt ceramic protected against formation of stains // 2598266
FIELD: ceramic industry.SUBSTANCE: invention relates to a method of producing a matt ceramic part and can be used in production of clocks. Method comprises following stages: a) production of a sintered ceramic part; b) sandblasting ceramic part to make it matt and final step; c) grinding matt portions to smooth their surface by a value of 0.8-2 mcm to form flat portions between cavities.EFFECT: technical result of invention is obtaining a matt smoothed ceramic surface not subject to contamination, in form of scratches and stains.9 cl, 6 dwg

System of working chamber for surface treatment of workpieces // 2598016
FIELD: technological processes; machine building.SUBSTANCE: invention relates to a working chamber for surface treatment of workpieces. Working chamber system includes a closed working chamber, at least one frame fastening device for workpieces and at least one manipulator. Fastening device for workpieces is made with possibility of movement along the corresponding guide bus between position of moving outside the working chamber and working positions in the working chamber. Fastening device for workpieces includes outer frame by means of which it is directed by appropriate guide bus, and inner frame in transportation position is surrounded by its outer frame and which in position and/or working position, can move in position outside the base plane of its external frame.EFFECT: providing constant distance from to manipulators.9 cl, 4 dwg

Rapid method for selection of parameters of processed material grinding through microcutting by single grain in metal binder // 2597444
FIELD: technological processes.SUBSTANCE: invention relates to machining by cutting. Proposed method comprises clamping a part on coordinate table under the lens optical device treatment of material with grinding tool, designing of an enlarged image of cutting zone on the screen with drawing. Material is machined with stationary grinding head and longitudinal feed of the coordinate table by tool consisting of single grain in metal binder, arranged in holder-indenter fitted on cylindrical surface of special sphere. Microcutting is carried out in stroboscopic effect at mating of frequency characteristics of flares of the stroboscope and spindle. On the screen is projected a conical shape of the cutting part of grain and mate it with the imaged on the drawing outer contour of grain prior to contact with the part. At maximum time of the grains value of wear are selected parameters of grinding.EFFECT: invention allows to expand technological capabilities of processing with fast selection of parameters of grinding.1 cl, 1 dwg

Shotblasting drum of periodic action // 2596936
FIELD: machine building.SUBSTANCE: shotblasting drum contains conveyor and bell-shaped side disks creating the work space, the disks by bases look on the conveyors. Diameter of the said bases of bell-shaped side disks is made larger or equal to width of the conveyor.EFFECT: prevention of jamming of tumbling treated parts in drum.2 dwg

Clamping device for fixation of working tool of hand-held machine // 2596931
FIELD: instrument making.SUBSTANCE: present invention relates to devices for clamping hand-held power tools. Device comprises at least one clamping unit to clamp a processing tool in the axial direction and at least one operating unit to actuate the clamping unit. To be connected to the clamping unit in a rotationally fixed manner, the operating unit has at least one jaw coupling element that is supported so as to be movable parallel to the axial direction.EFFECT: invention improves the functional characteristics of the device.14 cl, 14 dwg

ethod of making abrasive articles // 2596574
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing and can be used in making abrasive tool primarily for finishing. Method includes shaping abrasive powder of silicon carbide in static loading and dynamic loading with shock wave with subsequent thermal treatment. Prior to shaping to abrasive powder of silicon carbide powder is added boron carbide in amount of 25-35 % of weight of abrasive powder and preliminary thermal treatment is carried out at temperature 2,100-2,200 K for 15-30 minutes.EFFECT: higher quality of abrasive tool due to increased wear resistance when processing solid materials.1 cl, 1 tbl, 2 ex

Grinding device // 2596573
FIELD: agriculture.SUBSTANCE: invention can be used, in particular, for sharpening cutting pairs of shearing machines. Device comprises a framework, on which electric motor with grinding disc, covered with protective casing, holder for fixation of a sharpened comb or knife cutting pair, means to feed suspension on grinding disc and U-shaped vessel. Suspension feed means is made in form of embedded in upper part of protective case deflector with arc-like edge made along radius, inclined to centre of sharpening disc. Grinding disc is mounted with possibility of partial submersion into U-shaped vessel filled with suspension, and its inclination angle variation in vertical plane by changing inclination angle of bed.EFFECT: present device has simple design and reduces power consumption in process of sharpening.1 cl, 3 dwg

Blast wheel // 2596569
FIELD: turbines.SUBSTANCE: invention relates to blast wheels. Blast wheel comprises a housing, inner lining, flange with hub, impeller wheel with blades, impeller, guide sleeve and feed pipe. Impeller wheel consists of three discs, connected to each other by means of pins. First and second discs together are fixed on flange of hub and third disc is fixed on shoulders of pins at a distance equal to width of blade. Second and third discs are equipped with radial cuts on number of blades, not reaching edges of discs and having width equal to thickness of blade. Blades are equipped with shoulders, fixing in recesses of discs, and grooves on side of turbine axis with embedded spring rings arranged in said grooves.EFFECT: simplified design of turbine and broader functional capabilities.1 cl, 6 dwg

Portable machine with clamping device for fixation of working tool // 2596541
FIELD: machine building.SUBSTANCE: invention relates to portable processing machines, primarily portable processing machines with spindle driven into oscillatory movement. Portable machine comprises at least one clamping device for fixation of working tool. Clamping device comprises at least one clamping assembly (12a, 12b) having at least one rod-like clamping element (14a, 14b) for clamping working tool (16a, 16b) in axial direction (18a, 18b), and at least one located on clamping element (14a, 14b) clamping head (20a, 20b), having at least two movable relative to each other sections (30a, 32a, 32b 30b). Clamping device also includes at least one unit (22a, 22b) for conversion of motion for movement depending on movement of clamping element (14a, 14b) made at least substantially in axial direction (18a, 18b), at least two moving relative to each other sections (30a, 30b, 32a, 32b) of clamping head (20a, 20b) at least in one direction, different from axial direction (18a, 18b). Unit (22a, 22b) for conversion of motion is made in form of a movable unit (92 a; 92b) for displacement of at least in one mode of operation of clamping unit (12a, 12b) at least two moving relative to each other sections (30a, 32a, 32b 30b) of clamping head (20a, 20b) relative to each other in opposite directions (34a, 34b, 36a, 36b). Sections (30a, 30b, 32a, 32b) of clamping head (20a, 20b) have clamp surface (72a, 74a) which upon pressing working tool (16a, 16b) in axial direction of clamping unit (12a, 12b) are spaced apart to fit at least to surface of working tool (16a, 16b), and effect on working tool (16a, 16b) in axial direction (18a, 18b) with clamping force.EFFECT: technical result consists in increasing service life of process machine.7 cl, 7 dwg

Composite face grinding wheel // 2596534
FIELD: machine building.SUBSTANCE: invention can be used in making precast end abrasive wheels for treatment of metals. Abrasive wheel comprises a body with intermittent coarse-grained abrasive layer, centering mandrel and installed coaxially to housing with possibility of axial movement of barrel with its end surface of continuous fine-grained abrasive layer. Centering mandrel and sleeve with fine-grained abrasive layer form a screw pair fitted with provision of axial movement of sleeve with fixation in working and idle positions stop screws with their thrust into inner surface of housing and creation of tension in thread of screw pair.EFFECT: simple design and efficient roughing, finishing and finishing treatment of parts of machines and instruments.1 cl, 3 dwg

Device for micro feed of workpieces for flat grinding // 2596526
FIELD: machine building.SUBSTANCE: invention can be used for accurate feed of billets at their final grinding. Proposed device comprises base, top plate arranged parallel therewith, power element with gear motor and table for workpiece securing. Table vertical axis is in contact with top plate through journal bearing, on which lever is pressed in to contact with table via pin. Top plate and table are connected through axes with retainers made up of two sleeves with springs.EFFECT: as result, accuracy and quality of grinding and reliability of device for micro feed of billets.1 cl, 4 dwg

Clamping device for fixation of working tool // 2595791
FIELD: instrument making.SUBSTANCE: clamping device contains at least one clamping unit to clamp working tool in axial direction, at least one control unit for clamping unit and at least one return motion damping unit provided at least for damping return motion of control unit. Return motion damping unit is provided in order to create in opposite directions of motion control unit friction moments different on magnitude.EFFECT: disclosed is a structure of a clamping device.9 cl, 7 dwg

Composition for abrasive tool impregnating // 2595790
FIELD: tools.SUBSTANCE: invention relates to abrasive processing and can be used in production and operation of abrasive tools. Technical result is achieved by fact that composition for abrasive tool impregnating comprises acetone and organic substance dissolved in it, wherein as organic substance it contains tetramethylthiuram disulphide, in following proportions, wt %: tetramethylthiuram disulphide 3-5, acetone is rest.EFFECT: technical result consists in improvement of abrasive tool resistance and improved quality of machined surface.1 cl, 1 tbl

Cooling section hand-held machine housing and hand-held machine // 2595789
FIELD: machine building; technological processes.SUBSTANCE: invention relates to design of housing of hand-held machine, primarily, angular grinder. Cooling section of housing (90) hand-held machine providing cooling of electric motor installed therein, has at least two fasteners (18, 20, 22, 24) and at least one mounting seat (26, 28) located at least partially between fasteners (18, 20, 22, 24). Seat (26, 28) has at least one surface (30, 32, 34, 36, 38, 40, 42, 44), defining at least one ventilation recess (46, 48, 50, 52, 54, 56, 58, 60).EFFECT: improvement of cooling housing of hand-held machine.11 cl, 6 dwg

Abrasive products and methods of finishing surfaces // 2595788
FIELD: technological processes.SUBSTANCE: invention relates to finishing treatment of surfaces and may be used in optical industry, machine building and metal working for effective fine polishing of various surfaces. Coated abrasive tool has three-dimensional pattern of abrasive structures produced by extruding of abrasive suspension composition. At first, first coating of functional powder is applied, where abrasive suspension includes unprocessed green abrasive aggregates mainly of spheroidal or toroidal shape, obtained from composition with abrasive grains and binder of nano particles.EFFECT: provides finishing and elimination of defects on surfaces, including coated surfaces.12 cl, 5 tbl, 4 ex, 11 dwg

ethod for surface hardening of parts by friction processing with mixing by rotary tool // 2595191
FIELD: technological processes.SUBSTANCE: invention relates to hardening of flat surfaces of blanks. Hardening rotary tool is moved along whole surface of blank being machined with adjusted load and speed along preset trajectory. Hardening tool is used with working rod of height H1, wherein H1=0.8...0.9 H2, where H2 is depth of reinforced blank layer. Surface hardening is performed by impression of said hardening tool to depth H1 into blank.EFFECT: increased efficiency of hardening process.1 cl, 4 dwg, 1 ex

Composition for making cutting tools for steel and cast iron // 2595000
FIELD: metallurgy.SUBSTANCE: invention relates to powder metallurgy and can be used for making cutting tools. Composition comprises a superhard material containing a mixture of cubic boron nitride and diamond powders in the following components proportions, wt%: cubic boron nitride 20-60, diamond 40-80, and a binder containing a mixture of powders of copper, cobalt, iron, nickel and hexagonal boron nitride, at the following components ratio, wt%: copper 27.5-49.5, cobalt 13.75-24.75, iron 13.75-24.75, nickel 1-45, hexagonal boron nitride 0.05-1. Particle size of hexagonal boron nitride makes less than 500 nm.EFFECT: technical result is upgraded hardness of up to 100HRB, ultimate strength at the three-point bending of σbend up to 1,200 MPa, impact viscosity KCU up to 6 J/mm2, as well as efficiency of a cutting tool on the basis of a superhard material and its specific resource up to 3,000 cm2/mm at cutting steel and cast iron.1 cl, 5 tbl, 3 dwg, 1 ex

Device and method for separation of grinding oil from grinding slimes // 2594928
FIELD: metal processing.SUBSTANCE: invention relates to abrasive processing and can be used for separation of grinding oil from grinding slime. Device has container for mixing with agitator, moving up and down in it. Oil containing grinding slime is supplied into reservoir through supply pipeline. Provided inlet and outlet pipelines for separating agent, that is also inserted into vessel. After removal of oil grinding sludge is removed from container through discharge pipeline. In latter there is ring-shaped plate, installed with possibility of sliding along guide tube for agitator and along inner side wall of reservoir and having passage for removal of grinding oil settled on separating facility. Homogeneous mixture of separation and grinding dust is produced by means of agitator with oil separation from each grinding dust particle. After stopping of agitator separated oil emerge on separating facility and removed from container.EFFECT: result is high degree of separation of oil from grinding slime and repeated use of oil in grinding.19 cl, 5 dwg
 
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