Grinding and polishing (B24)

B24            Grinding; polishing(17608)

ethod to control output characteristics of rotor in form of its carrying capacity and rigidity // 2641942
FIELD: machine engineering.SUBSTANCE: method includes installation of the rotor in thrust bearings located at its front and rear ends, and on the side of the thrust bearings of gas-static bearing and a conical gas-static bearing with taper of 0.5-20% formed by conical part of the rotor and conical insert which are installed with radial clearance therebetween. The axial movement of the rotor relative to the conical insert is controlled by changing said radial clearance by changing the gas pressure which is fed to thrust bearings through said gas-static bearings.EFFECT: use of invention makes it possible to simplify the process for controlling the bearing capacity and rigidity of the rotor.2 dwg

Bilateral polishing napkins with interwoven loops // 2641431
FIELD: textile, paper.SUBSTANCE: napkin consists of a substrate, two fibrous grinding materials with textile fibres projecting from the material. One grinding material is attached to each side of the substrate. A connecting seam with an interwoven part of the textile fibres of each grinding material is provided.EFFECT: increasing the efficiency of using a napkin during polishing or grinding due to excluding hard and non-plastic edges on its surface.13 cl, 3 dwg

Grinding wheel // 2640688
FIELD: technological processes.SUBSTANCE: discontinuous working surface of the grinding wheel has a regular profile, for example the thread profile. The working surface of the grinding wheel includes an even number of sections. Each of them is profiled with a pitch equal to the profile pitch of the grinding workpiece, with the profile threads remote next by one and with the forming surface between the remaining threads in the form of a straight line connecting the bases of the threads. The section profiles are offset relative to each other. The sections of the grinding wheel consist of two segments, the abrasive material of which has a different seediness. Large-grained segments produce preliminary grinding, and small-grained segments - the final grinding of the workpiece.EFFECT: improved quality and productivity of the thread grinding.3 dwg
ethod for ultrasonic grinding of diamond films having outer layer of polycrystalline diamonds on surface of base // 2640370
FIELD: technological processes.SUBSTANCE: removing crystallites of said outer layer by exposing them to ultrasonic radiator to form a recorded roughness of the outer layer. The ultrasonic radiator has a planar radiating end surface of Ti3Al intermetallide. The action of ultrasonic radiator on the crystallites is carried out in a bath through the flow of suspension supplied between said radiating surface and the surface of the base of the suspension, in the cavitation mode with provision of microchipping of crystallites of the base outer layer. The oscillation amplitude A of the ultrasonic radiator is chosen A=(2-8) Ra, and the size in diamond grain in suspension is equal to B=3A, where Ra is initial roughness of the base outer layer.EFFECT: increased productivity and quality of diamond surface grinding.6 cl, 8 dwg, 1 tbl
ethod of grinding curvolinear surfaces of part on robotic technology complex // 2639584
FIELD: technological processes.SUBSTANCE: workpiece model is made and the predicted value of the removable allowance at each reference point is determined. It is compared with the actual value, and the problem areas are selected on the surface of the part. The allowance and modes of treatment are determined with an abrasive tool. The removal of the allowance on the problem areas is controlled by modifying the feed rate of parts depending on the size of the cut allowance, and additionally by changing the speed of the abrasive tool and the contact pressure on the workpiece surface depending on the wear of the abrasive tool and fluctuations in mechanical properties of the material.EFFECT: as a result, the quality and precision of the parts processing increases.9 dwg, 4 tbl

Grinding wheel // 2639421
FIELD: technological processes.SUBSTANCE: working surface of the grinding wheel has an even number of sections. Each of them is profiled with a pitch P, where P is the pitch of the profile of the polished workpiece, with the profile threads remote next by one and with the formation between them of a rectangular cavity with the width equal to P, the depth equal to N allowances for wheel dressing and connecting the adjacent threads of the specified profile. The profiles of even and odd sections of the working surface are offset relative to each other by an amount P. The sections of the grinding wheel consist of two segments, the abrasive material of which has a different hardness. More solid segments produce preliminary grinding, and less solid segments - the final grinding of the workpiece.EFFECT: quality of polished surfaces and the period of resistance of the grinding wheel increase.3 dwg

ethod and device for finishing-strengthening processing of interior surfaces of parts // 2639398
FIELD: technological processes.SUBSTANCE: parts are installed in a container and the hydrodynamical flow of the working fluid is pumped through the cavities of the parts. The parts are given translational rotation in a plane perpendicular to the flow. The flow velocity is determined depending on the characteristics of the working bodies, process fluid and angular velocity of the translational rotation of the parts.EFFECT: providing uniform removal of metal on the shaped profile of parts and ensuring the stability of their dimensions.3 cl; 8 dwg

ethod and cylindrical grinding machine for centerless cylindrical grinding // 2638478
FIELD: machine engineering.SUBSTANCE: detail rests on the first and the second abutment surfaces, which are arranged at an angle to each other in a prism type. The grinding wheel is fed with a certain feeding force in the direction of the detail, ensuring its secure fit to the abutment surfaces. The latter carry out braking of the detail, which is driven into rotation only by the grinding wheel. As a result of braking, the number of rotations of the detail decreases, and the grinding wheel along with the detail drive in rotation perform grinding. At the same time, the number of rotations of the grinding wheel and the detail, the braking force acting on the detail on the side of the abutment device and the grinding wheel feeding force are continuously monitored and coordinated among themselves.EFFECT: improve the accuracy and quality of grinding.9 cl, 4 dwg

achine for cleaning pipeline section // 2637954
FIELD: technological processes.SUBSTANCE: machine (24) comprises a cell (26) of a plurality of parts for enclosing a pipe therein. Each part of the plurality of parts of the cell is connected to move from each of the other parts of the plurality of parts of the cell. There is a plurality of drive elements (44) connected to the cell, at least, one abrasive blasting agent formed on one or more of the plurality of parts of the cell. Each drive element of the plurality of drive elements is designed to be in direct contact with or coated with a pipe (50) to be cleaned. The displacement of a plurality of the drive elements, when the pipe is enclosed in a cage, causes the cell to rotate around the pipe enclosed therein. The machine further includes stepping means for moving, at least, one abrasive blasting agent in the longitudinal direction relative to the pipe provided to the cleaning machine.EFFECT: providing the known and controlled stable quality of pipe cleaning, as well as uniform cleaning of the pipe surface.18 cl, 18 dwg
ethod for manufacturing elastic lapping // 2636773
FIELD: technological processes.SUBSTANCE: workpiece in the form of a mandrel is used, on the working part of which along its axis a through slot is made. Working elastic elements in the form of an ellipse are formed in one piece with the mandrel by expanding its working part with the help of a profile wedge when it is inserted into the slot until an elastic lapping with the working outer diameter is formed. After that, heat treatment of the lapping and fixing of abrasive grains on its working part is carried out.EFFECT: technology of tool production is simplified and its cost is reduced.4 dwg

Device for blank processing // 2636546
FIELD: machine engineering.SUBSTANCE: device comprises a housing, a drive shaft, the first connecting part with a gear ring attached to it, and the first part with the second connecting part engaged with the first one by means of a ring gear in the form of a crown gear. The first part is the blank-processing part. The first pressing means is provided to press the said crown gears to form a self-centering, gapless joint.EFFECT: duration of processing device positioning, in particular on a grinding machine, is simplified and shortened.16 cl, 15 dwg

ethod of nanostructuring strengthening surface layer of precision parts by smoothing and system for its implementation // 2635987
FIELD: technological processes.SUBSTANCE: smoothing tool is used, containing an indenter made of super hard tool material, and a module of cooling the indenter with a liquid coolant. The smoothing tool is mounted in a dynamometer, three outlets of which are connected to the microprocessor connected to an adjustable current source, which is connected to the said indenter cooling module. During the processing, the smoothing force is set, and the friction coefficient is maintained.EFFECT: processing speed is increased.2 dwg
ethod of restoration of set of circular knives for cutting strips in tube production // 2635028
FIELD: machine engineering.SUBSTANCE: in the method, the sharpening operation is performed without disassembling the stand in two stages, at the first stage all circular knives of each row are sequentially sharpened on periphery, at the second stage of finishing treatment the end faces of circular knives are cut to provide precise distances between the adjacent knives and preset axial displacement of the upper knives relatively to the lower ones. Prior to finishing treatment, the cutter inserts are replaced with new ones. At that, at all the stages, sharpening of the working surfaces of the knives is performed from cutting edges with rough transitions depth of 0.1 mm, half-finished - 0.07 mm, finished - 0.03 mm, feed rate at 0.03-0.05 mm/rpm cutting rate is 70-100 m/min. The sharpening is performed by cutters made of superhard materials based on boron nitride.EFFECT: invention makes it possible to reduce labour intensity of circular knife restoration operation performed without disassembling the stand, in which they operate, improve cutting conditions and improve their quality.2 cl
Abrasive mass // 2634564
FIELD: chemistry.SUBSTANCE: abrasive mass contains abrasive grains of electrocorundum, ceramic binder and filler, a ceramic bond containing refractory clay, feldspar, quartz in the amount of 92-93 wt % and barylsilicate frit in the amount of 2-7 wt %, filler from fine-dispersed powdered titanium oxide and chromium oxide, and as electrocorundum, the abrasive mass contains chromotitanium electrocorundum, with the following component ratio, wt %: abrasive grains from chromate titanium electrocorundum 62-67; a bunch of ceramic 10-12; filler is the rest.EFFECT: increasing the strength of abrasive mass.2 cl, 1 tbl, 3 ex

ethod of metalizing diamond while sintering with impregnated copper of diamond-containing carbide matrix // 2633861
FIELD: chemistry.SUBSTANCE: method of producing a diamond-containing matrix includes the preparation of a carbide powder charge, its plasticization, layer filling of the prepared charge into a metal mould and the laying of diamond grains having a shell of chromium particles, pressing the charge with diamond grains into a briquette and sintering the briquette in a copper impregnated furnace in a vacuum from the bottom up. Each diamond grain is placed in a copper foil of 25 and less microns thick before placing it in a carbide batch and pressing it into a briquette, into which 80-120% of the diamond granule powder is pre-laid and distributed, ensuring uniform distribution of the powder throughout the diamond surface. Thermal diffusion metallization of diamond grains with chromium is provided during sintering.EFFECT: increasing the adhesion strength of diamond grains to the tool matrix and reducing the diamond consumption as a result of preventing diamond graphitization by shielding the contact of the diamond surface with a copper foil with active components of carbide powder.1 dwg, 1 ex

ethod for obtaining surface of abrasive product and abrasive products obtained by this method // 2633127
FIELD: technological processes.SUBSTANCE: abrasive product contains a surface with a plurality of abrasive zones that the support layer carries. The abrasive zones are surrounded by interconnected channel portions, comprising of the first channel portions with the first cross dimension and second channel portions with the second cross dimension, which is greater than the first cross dimension.EFFECT: durability of the abrasive product and quality and efficiency of the treatment are increased.31 cl, 22 dwg, 2 tbl

Device for magnetic abrasive treatment of product // 2632732
FIELD: machine engineering.SUBSTANCE: device contains a cage and magnetic blocks installed evenly around the circumference in the annular channel. The cage is made of a soft magnetic material in the form of a magnetic core. The annular channel is made in the cage. Each magnetic block consists of two constant magnets whose poles polarity are opposite to each other. One of the magnets of the block is located on one side wall of the annular channel, and the other magnet of this block is on the opposite side wall with the formation of the working channel for the product between the magnets. The magnetic blocks with the magnetic core form an integral magnetic system of mainly C-shaped form.EFFECT: productivity and traetment quality increase, and the design of the device is simplified.2 cl, 2 dwg

Device for products polishing // 2632045
FIELD: technological processes.SUBSTANCE: device contains a polishing plate having a top surface with a polishing cloth and rotatably mounted in a horizontal plane. Above the polishing plate an upper ring is provided with the ability to move up and down and rotate in the horizontal plane. The carrier plate is located between the polishing plate and the upper ring. A stop is provided for stopping and holding the carrier plate moving to the underside of the upper ring by turning the polishing plate in the polishing position.EFFECT: providing the device that is small in size and simple in design.8 cl, 7 dwg
Composition for chemical-mechanical polishing (cmp) containing protein // 2631875
FIELD: chemistry.SUBSTANCE: invention relates to the composition for chemical-mechanical polishing (CMP) and its use in polishing substrates of a semiconductor industry. The composition comprises cerium oxide particles, a protein containing cysteine as an amino acid unit, and an aqueous medium.EFFECT: composition exhibits improved polishing characteristics.12 cl, 1 tbl

Installation for magnetic-abrasive treatment of a complex form // 2631534
FIELD: physics.SUBSTANCE: product of complex shape is placed in the working zone, formed by unipolar external poles of the magnetic circuit of the magnetic system and opposite in polarity internal pole. Outward unipolar poles are connected by a pole piece with a cylindrical hole in the center of the tip with the formation of a working zone in the form of an annular channel. The winding of the electromagnet is located in the center of the magnetic system.EFFECT: increases the productivity of the installation.2 cl, 2 dwg

Portable technological machine // 2631373
FIELD: machine engineering.SUBSTANCE: machine includes a handle housing and a switch with a movably mounted button and an unlocking element for unlocking switch button displacement interlocking device. The switch button is located on the handle section of the handle housing. The unlocking element has a pushable portion located outside the pressed surface of the switch button and is pivotally and/or rotatably mounted around the axis of the unlocking motion, extending in a plane perpendicular to the axis of the switch button motion.EFFECT: convenient control of the technological machine.16 cl, 16 dwg
ethod of manufacturing the fine-grained abrasive tool // 2630729
FIELD: machine engineering.SUBSTANCE: method involves preparing the components, mixing them to form the moulding mass, loading it into a mould and forming, followed by a high-temperature roasting. As components, abrasive grains with a size of 28-106 mcm, finely dispersed ceramic binder powders and dextrin are used. The mixing of mentioned components of the moulding mass is carried out in a certain order with different mixing time intervals.EFFECT: uniformity of the moulding mass and improvement of the technical characteristics of the abrasive tool.1 tbl
Abrasive mass for manufacturing tool with high structure numbers // 2630403
FIELD: machine engineering.SUBSTANCE: abrasive mass includes an abrasive, a ceramic binder, a filler in the form of aluminosilicate hollow spherical particles ranging in the range of 5 to 560 microns and particles of ground fruit bones in the range of 100 to 630 microns, gluing and moisturizing additives. As gluing and moisturizing additives in the amount of 15.5-20 vol. % it contains powdered dextrin in the amount of 75-150 vol. % of the ceramic binder and a 50% aqueous solution of lignosulfonate in the amount of 25-75 vol. % of the total filler content in the form of aluminosilicate and fruit seeds, with the following ratio of components, vol. %: the abrasive 26-42, the ceramic binder 5-21, the filler from aluminosilicate 2-15, the filler from fruit bones 4-12, the powder dextrin 7.5-12, the 50% aqueous solution of lignosulfonate 4,5-8, the natural pores - the rest.EFFECT: providing increased strength and uniformity of the moulding mass.1 tbl, 4 ex

Device for hardening processing of parts and method of hardening processing of parts // 2630145
FIELD: machine engineering.SUBSTANCE: device contains a container for the working medium, in which there is a rotor with blades and engine drive, and bearing assemblies with clamps for workholding and engine drive. The bearing assemblies with clamps for workholding in a horizontal position are fixed to plates provided with vertical grooves, these plates are mounted on the side walls of the container with the possibility of vertical movement. From the inside the container is covered with sheets of polyamide and is equipped with a cover on which the working medium reflector is fixed.EFFECT: processing efficiency is increased, the amount of working medium is reduced, the noise level is lowered.5 cl, 5 dwg

ethod of increasing of bending rigidity of rod products // 2630128
FIELD: technological processes.SUBSTANCE: residual stresses are formed in the axisymmetric plastic deformation of the article by means of a deforming tool with a conical working part. Residual voltages are formed at a relative reduction of 1.0%. Residual compressive stresses are formed in the peripheral layers of the article to a depth of 0.3R, where R is the product radius and residual tensile stresses in the central region of the article by creating a tensile force greater than the axial compression force.EFFECT: rigidity of the products increases.3 dwg

Technological machine // 2630088
FIELD: machine engineering.SUBSTANCE: processing machine comprises a handle body, a switch having a key installed on the handle body for operating the switching body of the switch, and a support assembly. The support unit is provided in order to communicate the movement from the one end thereof facing the connection area of the handle body to the other end of the hand grip end facing away from mentioned connection region when the switch key is acted upon. The support assembly comprises a linkage mechanism made in the form of a parallelogram mechanism. In this case, the action on the button of the switch causes it to move in the direction of the handle body along the entire longitudinal extent of the pressed surface of the switch key.EFFECT: accuracy of the machine control is increased.16 cl, 8 dwg

ethod for final machining of gas turbine engine blade and device for its implementation // 2629419
FIELD: machine engineering.SUBSTANCE: geometric characteristics of the blade blank are measured, the measured shape is compared with the theoretical shape, areas of the blade blanks for polishing are determined, toolpath is formed and cutting modes are set. For polishing, a tool in the form of a polishing wheel is used, having conical, toroidal and the second conical cutting surfaces aligned thereon for processing the back and trough of the blade, the concave surface of the shelf interface and the shelf surface, respectively. Polishing of the mentioned areas of the blade blank is carried out by the corresponding cutting surfaces of the polishing wheel by means of two manipulators for relative movement of the blank and the circle.EFFECT: final machining of all complex surfaces of the flowing part of the blade, taking into account the geometric characteristics of the blank.3 cl, 3 dwg

Braking device of manual machine // 2628270
FIELD: machine engineering.SUBSTANCE: braking device of the manual machine comprises at least one mechanical brake assembly, with at least one rotatably mounted brake element and at least one control unit and with a control element. The control element is designed to drive the response brake element perpendicular to the axis of rotation of the brake element.EFFECT: reliability of switching on and/or switching off of the manual machine is increased.10 cl, 5 dwg

ethod of multistage product grinding and also vacuum table, store, removable device and unit for method implementation // 2628190
FIELD: machine engineering.SUBSTANCE: product is delivered to the processing area where it is measured and/or installed. The robot contains a grinding head with which it grasps the first grinding means from the store and begins the first grinding process. At the end of the first grinding process, the robot again releases the first grinding means and captures the second grinding means. The second grinding process begins, at the end of which the robot releases the second grinding means. Upon the completion of the last grinding process, the product is removed from the processing area.EFFECT: automatic processing of products of various shapes is provided with the replacement of grinding means.12 cl, 12 dwg
Abrasive powder for processing surfaces and its application // 2627413
FIELD: chemistry.SUBSTANCE: abrasive powder consists of converter slag of metallurgical manufacture and contains 96-99.9 wt % of a compound mixture: portlandite (CaO⋅H2O), magnetite (Fe3O4), brucite (Mg (OH)2), calcite (CaCO3), spermite (2Ca2SiO4⋅CaCO3), calcium aluminate (5Ca⋅O3Al2O3), spinel (MgAl2O4), periclase (MgO), calcium silicate (Ca2SiO4) and 0.1-4 wt % of elements such as S and/or Mn, and/or Cr, and/or Zn, and/or Ti, and/or V. At least, 95 wt % of the powder particles are isometric and the remaining particles have a non-isometric elongated shape.EFFECT: increasing the efficiency and quality of surface treatment by increasing the strength of abrasive powder.2 cl, 3 tbl
Device for automated cover fastening and centrifugal-planetary plant container sealing // 2627083
FIELD: machine engineering.SUBSTANCE: device contains the end sealing, fixed in the centering ring bore of the container, the body with the diaphragm pneumatic motor, the rod of which is mounted coaxially to the container, and the pivoted clamps in the form of levers. Some ends of the clamps are connected to the rod of the pneumatic engine, while others are designed to interact with the container rim surface. In the rodless cavity of the pneumatic engine, formed in the end cover, the spring is provided to seal the cover connection to the container by means of mentioned end sealing.EFFECT: processing capacity is increased due to the automated process of loading and unloading and the container sealing.2 dwg, 1 ex

ethod of sealing anode paints with collision of a sandwashing machine // 2627072
FIELD: technological processes.SUBSTANCE: direct two jets of abrasive material towards the part covered by the mentioned paint. The jets are oriented with convergence at the focusing point in front of the part.EFFECT: processing speed is increased.5 cl, 4 dwg
Procedure for finishing treatment of parts // 2626706
FIELD: machine engineering.SUBSTANCE: first the parts are subjected to semi-finished processing by the method of microscopic impact, which is carried out with the help of a non-refillable instrument made of optical glass with a part pressure on the instrument of 0.01-0.03 kg/cm2 and the average speed of their relative displacement of 0.06-0.08 m/s. At the same time, an abrasive paste or micropowder with grain size M3-M7 is used with the addition of kerosene in an amount of 0.15-0.25 mg/cm2. Then, the tool is processed with the instrument in the form of a solid substrate coated with newsprint with a deposited diamond paste. Newsprint is taken with a typographic text, it is kept at an air humidity of 60-80%, the coating is carried out in two coats.EFFECT: quality and productivity of processing are increased, risks are excluded.7 dwg

ethod and device for protection from corrosion cracking of welded steel structure // 2626705
FIELD: metallurgy.SUBSTANCE: method involves patching the near-surface cracks by step-by-step impact with pulse current in the zone of tensile residual welding stresses and compressing said zone with dynamic impacts. The device contains a movable portal, provided with movable clamps, compressing springs, two electromagnetic clamps, a capacitor point contact welding machine, two electrodes for one-sided capacitor contact welding, a multi-head caulking stiffener with an air cylinder and a bundle of needle wires fixed to the portal casing, with two springs, located at the top and bottom of the portal to dampen its vibration from the side of the reinforcing pneumatic hammer, and a control unit. In this case, each electrode is fixed in the electrode holder with the ability to move by means of the pneumatic cylinder and connected to the capacitor point contact welding machine. The pneumatic thrust and the pneumatic hammer of the multi-head caulking stiffener are made with the possibility of connecting to a source of compressed air.EFFECT: invention protects welded metal from corrosion cracking.2 cl, 1 tbl, 8 ex

Device for surface plastic deformation // 2626522
FIELD: machine engineering.SUBSTANCE: device contains a deforming element with a rounding working surface, a sticking of the deforming element, a geared motor, a mechanism for converting the rotary motion into a reciprocating motion and an instrumental unit for adjusting the inclination angle of the deforming tool with respect to the vertical.EFFECT: increased productivity of surface plastic deformation.2 dwg

Electromagnetic shotblaster // 2626254
FIELD: machine engineering.SUBSTANCE: shotblaster contains the base, the axis, the drive belts, the non-magnetic body with drive belt grooves, rotatably disposed on the axis, and the electric motor, configured to transfer the rotation to the non-magnetic housing by means of the drive belts. The non-magnetic replaceable rim is attached to the non-magnetic body, having the transverse ribs and two longitudinal ribs and made with ability to rotate at 3000 rpm. Inside the non-magnetic body there is the sector electromagnet, rigidly mounted on the axis and made with ability to rotate and fasten at any angle relative to the base.EFFECT: reduction of the shot dispersion and provision of easy and quick adjustment of its flow direction.3 cl, 4 dwg

ethod of magnetic-abrasive polishing of work areas of taper tap // 2626124
FIELD: machine engineering.SUBSTANCE: stepwise processing of the intake, calibrating and leading work areas of a taper tap with its forward and reverse rotation in the magnetic-abrasive mass. At the first stage, all working sections of the taper tap are processed for a time period necessary to obtain the lowest values of microgeometric parameters in one of the three work areas. At the second stage, one of the two remaining work areas is refined to obtain the required values or the limits of the microgeometric parameters of the area. And the processing time is established in terms of the lowest values of microgeometric parameters of one of the two work areas of the taper tap. At the third stage, the remaining work area is refined to the required values or limits of the microgeometric parameters for the time period necessary for the final formation of the microgeometry of this area.EFFECT: sudden drops of the values of microgeometric parameters in the transition zones are excluded, the durability of taper taps is increased and the quality and accuracy of the produced thread is improved.6 dwg, 1 ex

Braking device of manual machine // 2626109
FIELD: machine engineering.SUBSTANCE: manual machine comprises at least one braking device with at least one rotatably mounted braking element, which rotates about the axis, and at least one control unit with at least one movably mounted control element. Wherein the braking device comprises at least one node with a motion converting element for converting the movement of the motion converting element in the motion control of the response of the braking element transversely to the rotation axis of the braking element.EFFECT: simplified design of the manual machine.10 cl, 8 dwg

ethod of producing polycrystalline diamond materials // 2625693
FIELD: chemistry.SUBSTANCE: method comprises formaton of metal coating on the surface of diamond powder particles and formation of polycrystalline diamond material from the diamond powder by influence of pressure and temperature, wherein synthetic diamond powder is used as diamond powder, containing intracrystalline metallic inclusions, which is subjected to heat treatment in a protective atmosphere at a temperature of metal inclusion liquefaction and extraction of the melt particles on the surface in the form of droplets, followed by cooling at ambient temperature and forming diamond powder particles of the discontinuous coating on the surface. The heat treatment is carried out at a temperature of 1200-1600°C for 15-30 minutes.EFFECT: increased wear resistance due to the large volume content of diamond particles and the possibility of their tighter compaction, heat resistance due to very low content of metallic inclusions in the material and strength.2 cl, 1 dwg, 1 tbl

ethod of strength increase of details with coating // 2625619
FIELD: machine engineering.SUBSTANCE: part is deformed with a deforming element and the subsequent coating hardening is performed by ultrasonic treatment with a frequency of ultrasonic vibrations of 18-22 kHz by a reinforcing element. The distance between deforming and reinforcing elements is 10-30 mm, and a linear deformation spot displacement speed of the deforming and reinforcing elements is 50-100⋅10-3 m/s with a longitudinal feed of 0.08-0.12 mm/vol.EFFECT: adhesive strength between the coating and the substrate is increased.2 cl, 2 dwg, 2 tbl
ethod of strength increase of details with coating // 2625508
FIELD: machine engineering.SUBSTANCE: part is deformed with a deforming element while passing through the zone of contact between the deforming element and the surface being treated of a pulsed electric current of 2-5 kA, a voltage of 2-3 V, with a pulse duration of 0.08-0.2 s and a pulse frequency of 0.16-0.4 Hz. Running is carried out with a force of 50-3000 N with a deformation spot displacement speed of 50-100⋅10-3 m/s with a longitudinal feed of 0.08-0.12 mm/rev.EFFECT: adhesive strength between the coating and the substrate is increased.1 dwg, 2 tbl

ethod for forming arbitrary form holes in cylindrical and conical parts with hydroabasive jet // 2625381
FIELD: technological processes.SUBSTANCE: spherical technological bodies are laid inside the part, and the open sides of the part are closed with plugs with perforated holes measuring 0.25-0.5 times the diameter of the technological body. The part is installed on the lodgement. The part together with the lodgment is immersed in a container with water. A jet of water is fed.EFFECT: holes of arbitrary shape are formed without destroying the inner surface of the part.3 ex, 1 dwg
Device of burnishing deep funnels // 2625364
FIELD: mining.SUBSTANCE: spring and piston type mechanism for the mandrel-punch feeding is set in the rear support creating an inlet sealing zone. The sealing device located in the front support is made in the form of a muffler with regulating elements in the form of spring and spiral pairs and contacts with working surface of a mandrel-punch getting out of the processed funnel.EFFECT: constant pressure setting is maintained when mandrel-punch gets in and out.2 cl, 5 dwg

ethod of manufacturing the profile grinding circles from superhard materials // 2624879
FIELD: machine engineering.SUBSTANCE: working surface of the grinding wheel is profiled using a rolling roller by rolling a pasty mixture containing a powder of a metal binder, a grain of a superhard material and a plasticiser onto the workpiece of the grinding wheel. After that, the billet is dried and sintered.EFFECT: durability of profile grinding wheels from superhard materials is increased, the labour intensity of their production is reduced.5 cl, 2 dwg, 1 tbl

Braking system of technological machine // 2623930
FIELD: transportation.SUBSTANCE: braking device portable processing machine, preferably a manual machine, comprises a mechanical brake assembly (14a; 14b; 14c) having a braking element (16a, 18a, 20a; 16b, 18b; 16c, 18c, 20c), slidably mounted to its transfers braking position and/or disinhibited position due to inertia and/or by the driving torque actuator, and the follower unit (22a; 22b; 22c) having formed as a gear output element (24a; 24b; 24c) and driven by a drive unit (68a) carrying the technological machine to ensure the transmission of generated driving unit (68a) forces and/or torques to the working tool (60a) processing machines. The brake assembly (14a; 14b; 14c) has a control element (26a, 28a, 30a; 26b, 28b, 30b; 26c, 28c, 30c) for moving the brake operable brake member (16a, 18a, 20a; 16b, 18b; 16c, 18c, 20c) substantially perpendicular to the axis (32a; 32b, 32c) of the driven rotation member (24a; 24b; 24c).EFFECT: provision of braking or brake a moving machine element of a constructive process for a certain period of time.10 cl, 11 dwg

Device for honing the hole of the detail completed with radial holes // 2622550
FIELD: machine engineering.SUBSTANCE: device contains a housing installed in the housing in bearings on two semi-axles of the cross, in which the guide bushing is fixed in orthogonally located bearings on the two semi-axles. There is a replaceable insert for the installation of the workpiece, made with radial holes and located in the guide bush with the formation of a cavity between the insert and the workpiece. Mentioned axle shafts on which the guide bushing is fixed are made in the form of hollow tubes extending out of the housing for pressurizing the lubricating-cooling process into the cutting zone through the radial holes and the cavity of the replaceable liner and the radial holes of the workpiece.EFFECT: productivity, accuracy and quality of processing are increased, the service life of the tool is extended.2 dwg

Spindle unit // 2621524
FIELD: machine engineering.SUBSTANCE: invention can be used, for example, for high-speed grinding of small holes by grinding wheels with a super-hard abrasive monolayer applied. The spindle unit comprises a prefabricated housing, a spindle with hydrostatic supports having an annular chamber for injecting a working fluid, a spindle rotation electric motor disposed between the hydrostatic supports, and a spindle own longitudinal wave generator having a piezo plastic package which is mounted rearwardly on the rear flange of the assembly housing coaxially to the spindle, and the front end of the piezoelectric plate forms a slot gap with the rear end of the spindle, which opens into the annular chamber for injecting the working fluid. On the supporting surfaces of the spindle, there are spiral microcavities connected to annular chambers for injecting working fluid.EFFECT: use of the invention makes it possible to increase the loading characteristics of the spindle and the accuracy of spindle centering.1 dwg
ethod of accuracy and productivity increase of round grinding // 2621495
FIELD: technological processes.SUBSTANCE: method includes continuous monitoring of the abrasive wheel cutting ability when grinding on a cylindrical grinding machine using an acoustic emission (AE) sensor and automatic correction of the abrasive wheel with a change in its cutting ability. During the grinding process, the spectral distribution of the number of AE emissions and their peak amplitudes in the frequency spectrum range from 60 to 300 kHz is continuously monitored. Changes in these parameters reflect changes in the structure of macro- and microgeometric deviations of the abrasive wheel interacting surfaces and the details and processes of plastic deformation that develop in the course of reducing the cutting ability of the abrasive wheel. In this case, the automatic correction of the abrasive wheel is carried out by means of its electroerosive dressing by changing the voltage of the electric pulse generator power source supplied to the abrasive wheel in the range of 25…40 V and pulse frequencies in the range of 1…22 kHz.EFFECT: increased accuracy and productivity of the grinding process.3 dwg

Head for abrasive blasting of surfaces // 2621493
FIELD: machine engineering.SUBSTANCE: head for abrasive blasting of surfaces contains a head moving mechanism, an abrasive feed device, an abrasive hopper and a nozzle connected to a source of compressed air and connected by a pipeline to the hopper. The mechanism for moving the head contains two worms with crossed mutually perpendicular axes and a worm wheel. The worm wheel is rigidly fixed on the axis of the first worm placed on the platform and interacting with the gear sector. The gear sector is rigidly connected to the nozzle. The worm wheel is interfaced with a second worm, the axis of which is aligned with the vertical axis of rotation of the platform. The second worm is made with a through axial hole into which the pipeline is passed.EFFECT: simplified construction.7 cl, 3 dwg

Abrasive particles, method of obtaining abrasive particles and abrasive articles // 2621085
FIELD: technological processes.SUBSTANCE: moulded ceramic abrasive particle comprises the first surface, the second surface and a peripheral surface. The first surface has a perimeter consisting of the first and the second edges. The first perimeter area comprises the second edge and extends inwards, ending at the two vertices forming the first and the second internal acute angles. Wherein the perimeter comprises four vertices forming internal acute angles. The second surface is positioned opposite the first and does not come in contact with it. The peripheral surface is positioned between the first and the second surfaces, joining them. The peripheral surface comprises the first wall contacting with the perimeter at the first edge and the second wall contacting with the perimeter at the second edge.EFFECT: higher efficiency of abrasive processing.16 cl, 23 dwg, 2 tbl, 8 ex