Soldering, e.g. brazing, or unsoldering (B23K1)
B23K1 Soldering, e.g. brazing, or unsoldering(6228)
FIELD: metallurgy.SUBSTANCE: parts preassemble butt-to-butt and direct the electron beam to the joint. The electron beam is moved across the joint and make its scanning with frequency of 750-850 Hz along the diameter circle d=(0.6…0.8)h, where d - diameter of the scanning circle of the electron beam, mm; h - thickness of the welded parts, mm.EFFECT: invention allows to eliminate nonuniform melting of the parts edges made of dissimilar metals, which causes nonuniform metals intermixing in the joint melt, which greatly reduces the strength of the joint in the finished product.1 dwg
FIELD: metallurgy.SUBSTANCE: method includes layered billet production in the form of a package and its subsequent rolling. The layered billet is produced by package welding in a solid phase in gas protected medium by rolling at a temperature of 420-470 °C with 20-30% relative compression. Then, the billet is subjected to multipass cold rolling upto the specified thickness at a relative compression 10-15% per pass and with interpass annealings at a temperature not higher than 500 °C after reaching the total degree of deformation more than 35%. Then a final heat treatment is carried out at a temperature of 500-800 °C with holding 1-4 hours.EFFECT: mechanical and performance properties of the composite sheet material improving.1 tbl
FIELD: physics, computer science.SUBSTANCE: present invention relates to the assembly on the printed circuit board. It is achieved by that, the assembly on the circuit board includes: a bottom layer; electronic components, which are divided into categories, at that, each component is attached to the bottom layer by means of fasteners, having a specified temperature of thermal tripping, depending on to which category applies the mentioned component.EFFECT: invention provides creation of an assembly on a printed circuit board and the assembling method of such assembly on a printed circuit board, in order to facilitate separation and collection of different electronic components, mounted in an assembly on a printed circuit board, at the end of its service life, and additionally facilitating the reuse of electronic components and / or recycling of substances, from which the electronic equipment wastes consist of.12 cl, 6 dwg
FIELD: metallurgy.SUBSTANCE: method includes stringer installing on the collar, performed on the covering at the place of the stringer location, and its weld tack, positioning and clamping of the stringer in the welding area by means of the head with the guide rollers, stringer welding with covering collar simultaneously by two beams, directed from two opposite sides of the stringer and moving along the weld joint of the stringer. Thus the stringer welding from one side is performed by the first beam, providing weld penetration to the depth equal to 0.8-0.9 of the stringer thickness, and from the other striger side the welding by the second beam is performed, providing weld penetration to the depth equal to 0.2-0.3 of the stringer thickness. The first beam is moved in front of the second beam at the distance greater than the length of the welding bath of the first beam.EFFECT: invention improves the quality of stringers welded joints with the increased thickness and stiffness.7 dwg
FIELD: metallurgy.SUBSTANCE: bimetallic strip contains an aluminum-based primary layer in the annealed condition and at least one copper-based cladding layer in the annealed condition. The ratio of the ultimate strength values of the cladding layer and the primary layer is greater than 1, and the ratio of the thickness values of the cladding layer and the primary layer is defined by the following condition: Ncl/Npl<0.2235(σcl/σpl)-0.628, where Ncl, Hpl are thicknesses of the cladding layer and the primary layer in mm; σcl, σpl is the tensile strength of the cladding layer and the primary layer in MPa. During manufacturing of bimetallic strips joint rolling of prepared layers, diffusion annealing, cold post-rolling followed by annealing are performed. Diffusion annealing is carried out when the total deformation determined by the following condition is achieved: E=-0.0543(Ncl/Npl)2+2.5686(Ncl/Npl)+49.4, where E is the total deformation of the tape from the initial state. Each subsequent annealing is carried out when the total deformation determined by the following condition is achieved: E≤-0.23(Ncl/Npl)2+9.8(Ncl/Npl)-11.2.EFFECT: no ruptures in cladding tapes and, as a consequence, an increased product yield.2 cl, 2 dwg, 1 tbl
FIELD: pipes.SUBSTANCE: invention relates to pipe welding, specifically to welding stands for longitudinal welded pipes of definite length assembling and welding. Stand comprises holder, in bases of which symmetrically to vertical axis upper and side roller cartridges with their displacement adjustment mechanisms are installed, upper pressure rollers with their displacement adjustment mechanisms in form of hydraulic cylinder and drive screw-nut kinematic pair, support rollers, installed at holder bottom and welding machine. Side roller cartridges displacement adjustment mechanism is arranged along holder base radius. Stand is equipped with installed on holder upper part rings sectors and moving carriages with support upper and lower rollers. On sliding blocks upper roller cartridges are mounted with hydraulic cylinders arranged on its opposite ends, on rods of which shackles with holes are fixed. Upper support rollers are made with eccentric. Each carriage has displacement drive.EFFECT: invention allows to increase pipes quality and reduce gauge setup duration.1 cl, 10 dwg
FIELD: electricity.SUBSTANCE: invention can be used in the manufacture of lead-acid batteries, particularly batteries for backup power and dual purpose. The flux contains hydrobromic acid, monoethanolamine, isopropyl alcohol, N-methyl-2-pyrrolidone and adipic acid in the following ratio, wt %: N-Methyl-2-pyrrolidone 35-54, isopropyl alcohol, 5-9, 15-30, adipic acid, hydrobromic acid 40% -s 10-25, monoethanolamine 3-10. By optimally matched qualitative and quantitative content of activators and solvents flux has low volatility and environmental friendliness combined with high economic performance component consumption per unit of storage products.EFFECT: absence of corrosive reaction products after interaction with oxides of flux on the surface, eliminates the need for additional washing procedures, and brazed constructions respectively wastewater pollution.2 tbl
FIELD: metallurgy.SUBSTANCE: method includes plasticizing hard-alloy powder mixture, filling the metal mold with the end charge, compressing the charge to briquettes, laying diamond monocrystal onto the briquette surface and sintering the briquette with the diamond monocrystal soaked in low-melting metal or an alloy in the upward direction. Herein a layer of plasticized fine chrome powder with the thickness of 0.3-2 mm is formed on the end of the briquette, diamond laying is produced on top of the finished layer of plasticized fine chrome powder on the briquette end surface, and the briquette sintering is conducted at the temperature not higher than 1100 °C with the holding time of not greater than 5 minutes.EFFECT: increased strength and reliability of the compound of diamond monocrystal with the tool metal base.2 cl, 1 dwg
FIELD: construction.SUBSTANCE: invention relates to construction of track and may be used in the repair or continuous welded rail laying. For rail bar connection with the recovery of continuous welded rail operating temperature at low temperatures ends of adjacent rail bars are welded with a traction device. Necessary clearance is determined before the calculation of bars tension. After thermite welding the part of the rail bar determined by calculation is detached at both ends of the weld joint. Ram down sleepers and fix rails on them. On both sides of the tensioning device in a calculated rail length before welding detach, heat and bent to the calculated value. After rails cooling and the reaching of the necessary strength by the welded joint the heating is stopped, and the curved areas of the rails are straightened.EFFECT: possibility of withdrawing the excess longitudinal force in the tensioner is achieved.
FIELD: technological processes.SUBSTANCE: invention can be used to obtain corrosion-resistant copper-nickel coating of sealing area of the valve box assembly from aluminum-nickel-bronze. An arc weld deposition of working layer of copper-nickel alloy through an intermediate layer is performed. The intermediate layer is welded in 1-2 layers of copper-nickel alloy with 16-18% nickel content. The working layer is welded in 2 layers of copper-nickel alloy with 40-50% nickel content. Deposition of sublayer and working layer is performed downward at the product inclination 5-10°. During deposition of the intermediate layer onto bronze a layer of the activating flux of 34A grade is applied.EFFECT: by improving the corrosion resistance of the underlayer the method provides decrease of nonferrous metal consumption while maintaining the cracking resistance of the product.2 cl, 1 tbl
FIELD: electricity.SUBSTANCE: electrode for use in a torch for plasma arc welding. The electrode includes a body, which has a front portion, middle portion and rear portion. The front portion includes the electrode working end comprising first conductive material; the working end of the electrode includes: 1) a contact area for an auxiliary pilot arc across the nozzle plugs and 2) emitter. The middle portion comprises a second material and limits the proximal end for mating with a front portion and a distal end for coupling with the rear portion. Material density, inherent for the second material is at least half the density of the material, that the first material has. The electrode also includes a conductive path, extending from the front portion to the rear portion of said body.EFFECT: improved burner maneuverability and ease of use for manual operations.58 cl, 6 dwg
FIELD: technological processes.SUBSTANCE: invention relates to large-diameter pipes welding method. Performing tack weld with welding torch with simultaneous monitoring over edges joint using scanning sensor located before welding torch. Immediately after tack weld welding performing application of notch onto it by laser beam or mechanical tool, which position is adjusted by means of said sensor. Performing root weld hybrid laser-arc welding by welding head, which position is adjusted relative to joint by said sensor guidance onto produced notch.EFFECT: invention enables to avoid occurrence of inadmissible defects in form of penetrations and edges incomplete fusion in hybrid laser-arc welding welds, which can occur at laser beam deviation from welded joint.1 cl, 1 dwg
FIELD: technological processes.SUBSTANCE: method can be used for welding of tubular parts for various intended uses using a press welding with heating by arc, regulated by magnetic field. During welding, the initial compression of pipe ends is performed for short circuit, then voltage is applied and bounce between pipes is provided, resulting in arc ignition. Pipe ends are preheated by arc rotated by magnetic field. Scum is discharged by instantaneous increase of current before setting. Setting is performed by compression of molten pipe ends and the pipe ends are held under current for their slow cooling. All stages are planned and performed using smart relay of the welding process control panel and actuators. Welding parameters are checked on the control panel using a line of sensors, the signals of which are processed, analyzed and displayed on the monitor screen.EFFECT: method provides minimizing the power losses during welding, improves the weld quality and performance capabilities of the equipment.5 dwg
FIELD: technological processes.SUBSTANCE: method can be used for reconditioning worn-out surfaces of parts by electric contact welding of metal powders. Performed is welding a filler material containing a steel mesh and a powder. Determined is porosity of the obtained metal coating as the ratio of volume of pores, cavities and discontinuities to its total volume. Filler material is used made in the form of a filled with granules of a metal powder container made of a steel mesh, gaps of which are less than sizes of the said granules. Square of the container is selected in accordance with the square of the reconditioned surface taking into account its longitudinal and transverse deformations during welding. Predetermined are the weight and the volume of the container mesh wires and the metal powder granules. After welding the said filler onto the worn-out surface the metal coating thickness is measured and its total volume is determined. Calculated is the volume of pores, cavities and discontinuities in the interlayer of the metal powder with due allowance for the said volume of the container mesh wires and the metal powder granules.EFFECT: method enables to obtain a high-quality metal coating and simplifies determination of its porosity.1 cl, 4 dwg, 1 ex
FIELD: technological processes.SUBSTANCE: invention relates to welding of metal parts in special electrical engineering and can be used for making welded joints of thin-wall parts, operating under conditions of considerable difference of temperatureand pressure on both sides of welded joint. Method of welding includes local heating of welding area with high-energy beam, which is directed to specified section of welding and moved along welded parts. Energy beam is ion beam of specified material with weight ratio of ion to mass of molecules of material of welded parts no less than 10-1 and no more than 10. Welding is performed at ambient pressure not exceeding 10-3 mm Hg.EFFECT: technical result is obtaining strong welds of thin-wall parts due to more deep heating of welded parts.8 cl, 3 dwg
FIELD: technological processes.SUBSTANCE: invention can be used for radiation thermal treatment of materials, particularly for cutting, welding, bending, making holes. Contact spot is formed by mirror infrared electric lamp stationary fixed in cylindrical housing, and biconvex lens of same glass as lamp bulb glass. Said housing is fixed at given height from treated surface and rotated lens with lenses till preset diameter of beam contact spot with fixation of lens in specified position. Continuous surface temperature is recorded contact-free in contact spot zone. At constant contact spot diameter said temperature is adjusted owing to changing supply voltage of lamp. Heat treatment is performed during movement of part or said contact spot.EFFECT: method enables to create contact spot with size of up to 1 mm with high temperature and surface density of radiation on surface of received radiation material or part.1 cl, 6 dwg, 1 tbl
FIELD: pipes.SUBSTANCE: invention can be used for longitudinal seam welding of profiled tubes. On a welding system, in particular for high-frequency welding of longitudinal seam, is fed a pipe with butt weld, moulded on a forming mill from metal strip directly in line or obtained by pressure from at least one sheet metal. Butt longitudinal seam is formed by means of rollers (8), providing for pressing of connected pipe edges to each other to form a narrowing gap with a V-shape. Weld point (11) is inspected in narrowest point of edges of butt seam by means of thermal video camera (12), aimed at top of V-shaped gap. Temperature fluctuations of weld point with highest temperature is continuously measured and its migration in vertical and horizontal direction is determined. Obtained data are processed in processor (7) and welding parameters are adjusted based on condition of maintaining said weld point in same position.EFFECT: optimised welding process for producing a weld seam of high-quality.3 cl, 2 dwg
FIELD: manufacturing technology.SUBSTANCE: connection plate is installed on device post upper surface. Device for removal of welding tip from gun shank end comprises main housing, installed in its base cylinder and tip removal unit arranged with possibility of sliding movement within main housing. Tip setting device housing is mounted on connection plate upper surface. One end of tip transfer unit is aligned with housing bottom, and other end is aligned with connection plate upper surface. Tip fixation unit is aligned with one side of tip transfer unit. On housing upper surface hole is made for introduction of tips from their arrangement unit. Tips storing unit is located by their feeding device housing height. Rotary lever ensures opening and closing of hole in housing base for connection with tips storage unit.EFFECT: present invention can be used for replacement of spot welding gun welding tips.14 cl, 12 dwg
FIELD: technological processes.SUBSTANCE: invention can be used in resistance spot or relief welding parts with free approaches for electrodes. Electrode is made in the form of a rod, the length of which exceeds the value of its diameter. Rod is equipped with periodically repeating, uniformly spaced along the longitudinal geometrical axis of the electrode, primarily, crosswise relative to the longitudinal geometrical axis of the electrode projections formed on the side surface of the electrode. Electrode holder is equipped with a mounting part formed in the form of a through channel, the length of which is less than the length of the electrode. Mounting part of the electrode holder is equipped with reliefs, geometric characteristics of which correspond to geometrical characteristics of the electrode projections. Electrode is made with the possibility of its installation into the mounting part of the electrode holder with matching part of its projections with combs of the electrode holder reliefs.EFFECT: invention provides high coefficient of using electrodes, reduced process and environmental costs of production and using the electrodes, as well as low cost of making welded structures.6 cl
FIELD: manufacturing technology.SUBSTANCE: invention can be used for production of parts, in particular, automobile ones, containing multiple steel sheets jointed overlapped by point contact welding. Laser radiation is directed at the core of a point weld section obtained by contact welding to make a section crossing the core and extending beyond its limits by not less than 3 mm. In the steel sheet containing a martensite structure, provided is the depth of the section from the effect of laser radiation measured at the distance of 1 mm from borders of the core of the point weld section of at least 50 % of the said sheet thickness. When connecting the steel sheets, the outer of which is a zinc-plated steel sheet, laser radiation is directed from the side of the uncoated steel sheet to make a section crossing the said core and extending beyond its limits, without melting the section of contact with the zinc-plated sheet. In the uncoated steel sheet provided is the depth of the section from the effect of laser radiation measured at the distance of 1 mm from borders of the core of the point weld section of at least 50 % of the said sheet thickness.EFFECT: invention ensures prevention of destructions at the sections obtained by contact point welding.7 cl, 15 dwg, 4 tbl
FIELD: technological processes.SUBSTANCE: first, thin-walled shell is produced by cutting of pipes from steel of 28H3SNMVFA type into workpieces, calibration, recrystallization annealing, mechanical processing, rotary drawing in several passes with intermediate annealing by deforming rollers with triangular profile with rounded by radius or (and) flat tops, installed with various gaps relative to mandrel. Then performing shell ends process bulges cutting with subsequent trimming of its edges. Obtaining thickened rings from alloyed steel of 28H3SNMVFA type by cutting pipes into workpieces, calibration over outer diameter, recrystallization by softening annealing, machining with ends trimming and formation of conical section and cylindrical section for welding. Performing shell and two thickened rings assembling and welding. Performing high-temperature tempering of welds not later than 8 hours after welding. Performing X-Ray-TV testing of welds, casing hardening thermal treatment by heat treatment and tempering at least 1,520 MPa, tempering rings to ultimate strength of not less than 1,050 MPa and final machining.EFFECT: invention relates to method of high pressure vessels welded shells production from high-strength alloyed steels.11 cl, 5 dwg, 1 tbl
FIELD: technological processes.SUBSTANCE: invention can be used for replacement of working tip of welding electrode tongs for point welding. Working tip removing tool is connected with robot hand. Tool for installation of working tip is connected to one side of working tip removing tool. Tool for working tip feeding into the tool of its installation contains a post located at a distance from welding tongs.EFFECT: due to automatic replacement of working tip of welding electrode of tongs for point welding device provides ease of welding tool replacement and high efficiency of point welding preventing accidents.8 cl, 12 dwg
FIELD: technological processes.SUBSTANCE: invention relates to tee and angular joints laser welding and can be used for ribbed integrated structures production from aluminium alloys. Performing prepared panel web installation and securing on support surface, stringer arrangement on it and fixation using retainer. Using retainer, made in form of rigid massive longitudinal beam with lower surface, repeating inner skin contour, with side surface for contact with stringer surface and set of cramps. Performing stringer rib tack weld attached by retainer. Then welding stringer rib to skin on same side. With removed retainer performing welding on rib other side. Welding is performed by welding head with shielding gas supply tubular nozzle arranged at angle to welding beam, made covering welding zone along length, with slices at end enabling abutment to joint angular structure, and equipped with hole for filler wire and focused laser beam supply into welding zone.EFFECT: laser welding with filler wire result is production of thin-walled ribbed panels from aluminium alloys without buckling, thus excluding rib straightening operation relative to panel.1 cl, 5 dwg, 1 ex
FIELD: technological processes.SUBSTANCE: invention relates to production of metallized substrate (1), which consists at least partially, and preferably entirely, of aluminium and/or an aluminium alloy, at that, conductive paste (3) is applied to at least some sections of surface (2) of said substrate (1), in a first firing phase (B1), the conductive paste (3) is exposed to a substantially continuously increasing firing temperature (T). Firing temperature (T) is increased at least temporarily from approximately 40 °C per minute to about 60 °C per minute, which is increased to a predefinable maximum firing temperature (Tmax) of less than approximately 660 °C. In a second firing phase, conductive paste (3) is substantially exposed to said predefinable maximum firing temperature for a predefinable time period. In a cooling phase, the conductive paste is cooled down, and in a post-treatment phase, surface (4) of conductive paste (3) is mechanically post-treated, preferably brushed.EFFECT: disclosed is a method of producing metallized substrate.19 cl, 2 dwg
FIELD: heat engineering.SUBSTANCE: invention can be used for producing a permanently joined plate heat exchanger (1). Heat exchanger plates, having a solidus temperature above 1,100 °C, is provided beside each other to form plate package (3). Each heat exchanger plate comprises heat transfer area (10) and edge area (11), comprising bent edges which extend around the heat transfer area. Heat exchanger area (10) comprises a corrugation of elevations and depressions. On at least part of first convex surface (16) of a first plate, the melting depressant composition comprising a melting depressant component that comprises at least 25 wt% of boron and silicon. Plates are stacked into a plate package bringing second concave surface (17) into contact with the melting depressant composition on first convex surface of the first plate. Plates are heated to a temperature above 1,100 °C for melting the surface layer of the first convex surface of the first plate together with the melting depressant component and for forming a molten metal layer at the contact points between the first plate and the seconde plate. After solidification of said layer, joint is formed at contact points between plates and such that the bent edges form a tight fit between the bent edges of the plates.EFFECT: invention provides tight joint between heat exchanger plates.33 cl, 10 dwg, 15 tbl
FIELD: machine building.SUBSTANCE: invention can be used for production of car body parts with trimmed flanges by contact welding with a claw welder. First part of the manufactured part to make its outer side is forced fixed on a support, as well as its second part along the edge of the trimmed flanges. Connecting electrode is pressed to the trimmed flanges on the side of the second part of the manufactured part. On the surface of the second part a grounding counter electrode is set at a specified distance from the trimmed flanges. On the side of the flange opposite to the connecting electrode the claw thrust is installed to compensate the connecting electrode force. Thrust is introduced into a seat made in the support, herewith the support together with the manufactured part is pressed to the connecting electrode.EFFECT: invention provides absence of undesirable deformations of the external part of the manufactured part.10 cl, 2 dwg
FIELD: technological processes.SUBSTANCE: invention relates to a method for automatic arc welding of circular seams of rotary pipe joints. Welded pipes are assembled. Circular guide is installed on pipe and assembled pipes are welded by means of welding torch and welding tractor, moving with welding speed along circular guide. Welding of circular seams of pipes is performed using a driving roller device. Prior to welding method includes synchronisation of rotation speeds of driving roller device and movement speed of welding tractor along guide in opposite directions, while ensuring welding torch is in upper position relative to point of welding.EFFECT: higher quality of welded joint by reducing amount of added disturbances in welding during welding of pipes with deviation from straightness and when weld joint of pipe passes along driving roller devices.1 cl, 1 dwg
FIELD: machine building.SUBSTANCE: invention relates to method of connection of parts with internal coating and can be used in machine building, metallurgy, equipment for nuclear power stations and space engineering. On surface of sleeve 3 and on inner surface of butt connected pipes 1 and 2 is applied by plasma-arc method coating of refractory metal and layer of zirconium dioxide. Impregnated with plasma-arc coating with mixture of oxides of Al2O3, P2O5, Cr2O3. Inner protective layer 4 is formed. On layer 4 fusible 5 thermoplastic layer is applied on basis of tungsten glass. Part of pipe inner surface 1 and 2 near ends is left open. Put on sleeve 3 pipe 1 against stop sleeve end 3 in layer 5 pipe 1. Put on sleeve 3 tube 2 with similar prepared end face. Pipes 1 and 2 are welded.EFFECT: as a result no ingress of elements of coating in root weld and penetration of high-temperature aggressive medium to welded seam and surface of parts produced coating protects parts from high-temperature corrosion aggressive medium.1 cl, 1 dwg, 2 tbl
FIELD: manufacturing technology.SUBSTANCE: invention can be used for producing multilayer pipes, including thin-walled, in particular of bimetallic pipes from precious metals. Tubular billet with lower melting point is made from first metal alloy, which components form solid solution with low-melting eutectic phase. Second tubular blank is made from second metal alloy with addition of metal forming eutectic phase in first metal alloy. External tubular blank is installed coaxially to inside tubular blank and external tubular blank is crimped to tight contact of their adjacent surfaces to form bimetal tubular billet. Diffusion welding is performed by bimetal tubular workpiece heating to temperature above low-melting eutectic phase melting point, but lower than that of first metal alloy. After diffusion welding obtained bimetallic pipe is cooled down.EFFECT: method provides high strength of diffusion joint.12 cl, 6 dwg
FIELD: metallurgy.SUBSTANCE: invention can be used in low-temperature soldering in liquid heat carrier parts soft solders, particularly frames for housings of microassemblies of microwave range. Each of two baths of the device is made in the form of cube and is arranged in the housing with heat insulation. Heating devices are arranged: one is on the rear wall and other is on the front wall of each chamber and two are at the bottom. On side walls of chamber of bath for preliminary heating of parts there are atomisers for supply of nitrogen in it. In soldering bath chamber there is liquid heat carrier. Chambers are arranged in the housing of the plant, closed tight top cover with illumination. Front wall of the housing is transparent to displace vertically. Pipe is attached to condensation device, this pipe is connected to ventilation via flange and is closed with coolant condensate collector reservoir connected with chamber soldering via bend.EFFECT: technical result is improvement of quality and as a result, reliability of connection of parts that provides higher yield.1 cl, 1 dwg
FIELD: technological processes.SUBSTANCE: invention can be used for production of ultrafine-grained superplastic sheets of titanium-aluminium alloys in production of composite parts by superplastic forming and diffusion welding. Sheets of finished rolled stock from titanium-aluminium alloy, for example, Ti-48Al-2Cr-2Nb 2.0 mm thick, are initially processed in air by laser radiation and subjected to hot pressing at the pressure of 150 MPa and temperature of 1,250 °C for 2 h. So, the initial coarse-grained layered alloy microstructure is converted into fine grained duplex one having superplasticity and able to be connected at interatomic level, i.e. diffusion welding. Diffusion welding is performed in a vacuum furnace at the temperature of 1,100 °C, gas pressure of 10 MPa and deformation rate of 8·10-5 s-1.EFFECT: method provides improved strength characteristics of diffusion welded joints of parts from titanium-aluminium alloys.1 cl
FIELD: machine building.SUBSTANCE: invention refers to liquid-vapor plasmatron. On a metal tubular case there is a fixed reservoir for working fluid, filled with moisture absorbing material. Nozzle-confuser is held on the front part of the tubular body with a detachable cap with the help of threaded connection. There is coaxially movable central electrode and electric discharge chamber inside the housing. Cylindrical head front part of the aforementioned evaporator has an annular projection in the form of a shank with through longitudinal slots. There is covering it from the outside an elastic element that spring-loads the evaporator, this element rests into the inner annular projection of the housing on one side, and it rests into projection of the head part of the evaporator on the other side, and an insert that made from a set of rings made of capillary-porous material. Electrode with clearance relative to the evaporator is fixed coaxially in the head part of the metal rod holder, a tail rear part of it is installed with possibility of longitudinal movement in regulating and centering electrode mechanism. There is a drain tube inside the housing, one end of the tube is located near the shank of the evaporator, and the other end is in the rear part of the reservoir near its fuel filler. Cylindrical outer diameter of shank of the evaporator is smaller than outer diameter of the head part of the evaporator, which simplifies its manufacturing and assembly of the plasmatron. Elastic element is made from a set of heat-resistant plate springs.EFFECT: technical result is in improving reliability and increasing service life of the plasmatron.1 cl, 1 dwg
FIELD: chemistry.SUBSTANCE: invention relates to aluminium alloy of Al- Si-Cu system and particularly suited for use as sheet product useful in the manufacture of automobiles. Aluminium alloy intended for joining with steel, has the following composition, wt%: Si 0.25-1.5, Cu 0.3-1.5, Fe up to 0.5, Mn up to 0.1, incidental impurities, including Mg in amount of less than or equal to 0.05 separately and less than or equal to 0.15 in total, the rest is aluminium. Joined structure contains steel alloy component and aluminium alloy component with declared composition, joined with steel component. Multilayer aluminium sheet comprises core layer and at least one clad layer, at that at least one clad layer is made from disclosed aluminium alloy.EFFECT: invention is aimed at creation of strong and plastic joint of aluminium alloy with steel without using filler material.31 cl, 2 ex, 3 tbl, 14 dwg
FIELD: metalworking.SUBSTANCE: invention can be used in making multilayer panels from titanium alloys by pressure welding at heating, in particular, to aerospace engineering. Preliminary filler sheets are connected by laser welding. Then electric contact welding is used at intersecting zones to connect locally filler sheets. Then superplastic forming is performed and diffusion welding at temperature 900 °C with argon at pressure of 0.12 Mpa of inner and outer filler layers and linings. To prevent sheets' welding argon is blown at pressure 0.4 Mpa.EFFECT: method provides improved strength characteristics of multilayer cellular products from titanium alloy Ot4-1.1 cl, 2 dwg
FIELD: technological processes.SUBSTANCE: invention relates to method of plasma treatment of metals, such as welding, cutting and surfacing. For power supply of working compressed arc on plasma generating nozzle-anode positive potential relative to processed material is supplied. For power supply to second working compressed arc plasmatron to electrode-anode positive potential relative to processed material is supplied. Second compressed arc between plasmatron electrode and processed material is generated by supplying said electrode with positive potential from another source of supply, and treatment is carried out simultaneously with two compressed arcs on currents of reverse polarity.EFFECT: higher quality and efficiency of treatment of metals, particularly, aluminium and magnesium alloys by increasing efficiency and width of cathode metal cleaning in processing zone and to increase capacity in processing zone.1 cl, 1 dwg, 1 ex
FIELD: machine building.SUBSTANCE: invention can be used for induction welding at hardening of parts of machines and mechanisms, subjected to intensive wear, particularly means of agricultural and road-building purposes. Paste contains the following component ratio, wt %: boron carbide 50-55, Ferrochromium - 35-40, powder of nickel 1-6, powder of cerium 0.4-1.2, 4-5 % aqueous solution of carboxymethyl cellulose 10-12. In making of paste the components in the specified ratios are mixed in dry form and addition of 4-5 % aqueous solution of carboxymethyl cellulose as a binding agent. Composition of a uniform layer is applied on part surface subject to abrasive wear.EFFECT: paste increases wear resistance of built-up layer by increase in viscosity and plasticity of weld metal.1 cl, 1 tbl
FIELD: metalworking.SUBSTANCE: invention can be used in welding of high-alloy with the chrome content up to 25wt% and nickel up to 30wt% and heterogeneous steels. Applied onto a metal rod coating contains the following component ratio, wt%: dolomite 26-40, fluor spar 11.2-12.0, titanium dioxide 25.0-29.0, feldspar 0.5-1.0, quartz sand 0.5-1.0, periclase 0.5-0.8, chrome 7.0-9.0, ferrosilicon 5.0-6.0, nitrated manganese 4.0-5.0, molybdenum 2.0-3.0, nickel 2.0-2.5, iron-aluminium-zirconium addition alloy 0.5-1.0, nickel-magnesium-cerium addition alloy 0.5-1.0, sodium carboxymethyl cellulose 0.3-0.5.EFFECT: coating possesses high processability at crimping and tempering, electrode provides reducing the welded seam tendency to form hot crystallization cracks.4 cl, 3 tbl
FIELD: machine building.SUBSTANCE: invention can be used for production of ribbed panels. Proposed plant comprises of welding device for welding to blank surface, fixed on the template-drum. Line includes device for removal of produced finned piece with a drum conductor for cutting the said finned product workpiece for turning and straightening, as well as a rack finished finned workpieces, installed in the section of assembly of sheet finned panels. Working area of bridge crane cover process plant. Crane beam overlaps the zone of location of the device for straightening of finned workpieces entering into a bridge crane. And zone of arrangement of rack of finished ribbed workpieces of panels.EFFECT: line provides the flow process of manufacturing of finned panels, expanded assortment and rational use of shop area.1 cl, 2 dwg
FIELD: electronics.SUBSTANCE: invention relates to electron-beam gun, which contains cooled anode assembly with sleeve, cooled cathode assembly with insert for high-voltage input, hydrogen supply union, focusing electromagnetic lens, deflecting system. Cathode cooling is performed by U-shaped channel formed between end of insert and reverse side of cathode, which section area narrows towards centre of cathode due to wedge made at end of insert. Anode assembly is cooled by spiral channel made through entire anode housing. Focusing electromagnetic lens consists of three independent electromagnetic coils, rigidly installed on anode in steel bodies. Each coil has separate controlled power supply. Hydrogen feed union is installed in anode housing. Deflection system device is made in form of ring and is installed on anode housing from its lower face.EFFECT: to hydrogen feed copper bushing is used, which is installed in anode housing by cold fit, to swirl hydrogen flow channels are made on outer side of bushing at angle to bushing axis.5 cl, 6 dwg
FIELD: metalworking.SUBSTANCE: invention can be used for thermal cutting of metals with the help of a small-sized thermal cutting machine with replaceable cutters for gas and plasma cutting also providing stripping and marking the surface of cut parts with a colouring compound by means of replaceable tools. In the machine support two sensors of distance to the metal surface are mounted parallel to the cutter axis, one of which is inductive and the other one is eddy-current. Cutter holder assembly is connected to the foot bearing by two flat springs with rigidly fixed ends located with a gap in parallel to each other and transverse to the vertical axis of the working cutter and is pressed by them to the thrust plate. In the machine housing there are sockets for storage of replaceable stripping and marking tool. Stripping tool with a working element in the form of a metal end brush provides stripping of protective coating on the processed metal sheet in points of welding with mounting parts. At one end of a rod placed in the housing the working element attachment point is made. Individual eddy-current sensors provide maintenance of specified working gap of the tool and its protection from emergencies in collisions with obstacles.EFFECT: machine is multipurpose and possesses expanded technological capabilities.2 cl, 4 dwg
FIELD: technological processes.
SUBSTANCE: invention relates to a method of laser welding compounds tube-tube plate. Before welding are assembled compounds tube-tube plate with a gap is less than 0.2 mm. Focal plane of the laser beam relative to welded surface of tube plate at a distance -5…+5 mm. Welding is performed in two stages. At the first stage is shifted from the joint laser beam in the direction of tube plate and penetration. At the second stage the laser beam is directed on the joint and welding is carried out. In welding area is inert protective gas in amount of 10-15 l/min. Tube face ledge height relative to welded surface of tube plate is not more than 1 mm. Penetration may perform with laser beam power of ≥ 1 kW at welding rate of ≥ 25 mm/s.
EFFECT: high quality of weld joint.
3 cl, 1 tbl
SUBSTANCE: invention can be used for production of three-layer metal hollow panels for connection with vessel hull in designing, for example, bulkheads, recesses, decks, cockpit walls and decks of ships. Hollow metal panel consists of outer shells and arranged in between inner metal stiffening ribs. Prior to welding outer shells with ends of inner metal stiffening ribs at each side ribs are welded metal end face element in form of a strip, tee, angle swage or channel intended for connection with vessel hull. Welding of internal stiffening ribs and end elements with outer shells is performed by friction welding with mixing or laser welding.
EFFECT: method enables to create a full-strength connection of a three-layer structure with main body at their welding across generatrix of inner ribs and reduce labour intensity of its production.
1 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention can be used for connection of metal parts with solidus temperature above 1,100 °C. On the surface (15) of first metal part (11) melting inhibiting composition (14) is applied containing suppressing melting component including at least 25 wt% of boron and silicon for reducing melting point of first metal part (11). Second metal part (12) is brought into contact with melting composition (14) in contact point (16). Metal parts (11, 12) are heated to temperature above 1100°C. Provide melting of surface layer of first metal part to form together with said component of metal layer in contact with second metal part. Obtaining compound (25) in contact point (16).
EFFECT: invention ensures production of strong connection between metal parts in simple and reliable way.
28 cl, 19 dwg, 14 tbl, 5 ex
FIELD: technological processes.SUBSTANCE: invention can be used for production of welding of steel workpiece, in particular bearing ring. When implementing butt welding is performed melting and settling to produce weld (24). Method involves stage of heat supply (22) to at least welded joint (24) of workpiece (14, 30, 32) after upsetting at welding to raise temperature of welded seam (24) or to maintain temperature of welded seam (24) at higher level. Method also includes cooling said part (14, 32, 32) to temperature exceeding temperature of martensite formation (Ms), before said stage heating (22) of workpiece (14, 30, 32) after upsetting at welding.EFFECT: method allows avoiding or reducing formation of defects, in particular of cracks at welding of steel microstructure in zone of thermal influence near to weld corresponding microstructure of base metal.16 cl, 7 dwg
FIELD: pipe.SUBSTANCE: invention relates to methods of forming underwater pipeline at its laying. At that, multilayer metal pipe sections (2a, 2b), for example, with internal coating (6) by corrosion-resistant alloy and with chamfers on ends are coupled with end of pipeline with formation of welded ring joint (8), are made as internal and external welding passages. After that is external welding pass, for example burners (10) for arc welding, during which welding metal is deposited into root of welded joint (8), thereby forming root seam (4r), and then internal welding pass at root seam (4r) is performed by means of plasma welding, during which root seam (4r) is fused and changes shape.EFFECT: higher quality of welded connection of pipe sections and reliability of whole pipeline.8 cl, 17 dwg
FIELD: machine building.SUBSTANCE: invention can be used in repair of worn-out or damaged platforms of turbomachine blades made from titanium alloys. Method comprises removing from damaged areas coating and surface layer of metal, for example, by diamond grinding. Method includes surfacing damaged areas of titanium α-alloy or quasi-α-alloy and machining surfaced areas until restoration of preset geometrical sizes and shapes thereof. To preserve initial base size platforms, surfacing and machining are first carried out on platform on one side of blade and then on platform on other side of blade. After annealing of blades in vacuum at temperature not higher than 650 °C wear-resistant coating is applied on recovered areas by, for example, detonation spraying.EFFECT: method provides high accuracy of restoration of geometrical dimensions and shape of platforms, as well as high quality of repair, which increases reliability and service life of repaired blades.3 cl, 2 dwg
FIELD: transport.SUBSTANCE: invention can be used for flash butt welding for joining sections of a railway line using vibration apparatus. Method includes pre-configuring and attaching a vibration apparatus on a railway line. Method then includes controlled vibration of railway line at a suitable low frequency and amplitude of vibration. Railway lines are connected to each other by flash butt welding. When welding, frequency and amplitude of vibration are controlled by control means. Vibration enables longitudinal approach and breeding rail ends before welding is completed.EFFECT: not more than 5 minutes after loosening clamps on welded section applied by said vibration-controlled equipment for 5-25 minutes and cooling to relieve stresses that ensures formation of a quality weld.8 cl, 1 dwg
FIELD: plasma torches.SUBSTANCE: invention relates to plasma guns. Plasma gun comprises housing 1, insulation bushing 2, nozzle 3, electrode 4 arranged in conical cavity 18 of electrode holder 5, swirler 17 with grooves and gas supply channel 6 directed into annular conical cavity 7, where there is multistage gas-dynamic filter 8 (GDF), made in form of two aligned one after another deflectors,impermeable deflector 9 and perforated deflector 10 and three circular chambers, annular cylindrical chamber 11, circular distribution chamber 12 and circular vortex chamber 13. Surface of first non-permeable baffle plate 9 is made flat impermeable for plasma-forming gas passage (PGP) and forms together with ledge 14 of electrode holder 5 annular cylindrical chamber 11, and part of end surface of deflector 9 forms together with curved inner surface of insulating sleeve 2 annular channel 15 with expansion in direction of PGP flow. Surface of second deflector 10 is perforated by through cylindrical channels 16, which connect chamber 12 with chamber 13.EFFECT: invention makes it possible to evenly distribute PGP at air-gas path and nozzle assembly of plasma gun for stabilisation of plasma arc.1 cl, 4 dwg
FIELD: manufacturing technology.SUBSTANCE: first head element (11) of fastening appliance is made with application of force of a fixing tool. Second element (12) is connected to first head element (11) by means of a welded joint that is broken at a predetermined torque limit. Fasteners having same geometry of structural elements are made. Elements of fastening devices are connected to produce welded joints, having different value of maximum torque, by at least two contact welding processes with different values of at least one of welding parameters.EFFECT: invention can be used for production of fastening devices with limited torque, in particular, for anchor installation, for example, in embedded part.7 cl, 3 dwg
FIELD: technological processes.SUBSTANCE: invention can be used in making high-temperature soldering is permanently connected plate heat exchanger. Metal heat exchange plates, having temperature of solidus above 1,100 °C, are arranged one after another and form pack with alternating inter plate spaces. Each plate of heat exchanger has heat exchange area and surrounding it edge area. Heat exchange area includes corrugation of elevations and recesses produced by die forming plates. On surface corrugation is applied reducing melting point composition containing at least 25 wt% of boron and silicon. During heating of first and second plates to temperature above 1,100 °C surface corrugation melts together with step-down melting point component to form compound in points of contact between plates at their cooling.EFFECT: invention allows simple and reliable production of strong connection of plate heat exchanger plates.29 cl, 9 dwg, 14 tbl, 10 ex