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Method of turbine rotor manufacturing out of nickel heat-resistant alloy Method includes manufacturing of blanks of rotor components out of high strength deformed nickel alloy, preliminary heat treatment of the blanks, their connection by electron-beam welding with weld forming, and final heat treatment of the rotor welded structure. Weld is formed by the welded blanks movement relatively to the radiation source with speed 5-30 m/h, the rotor component blanks are made out of heat-resistant deformed nickel alloy containing in wt %: carbon 0.05-0.07, chrome 14-16, cobalt 15-17, molybdenum 4.5-5, tungsten 1-1.8, niobium 4.2-4.7, total aluminium and titanium 2.5-3, zirconium 0.5-0.8, boron 0.001-0.003, magnesium 0.01-0.03, lanthanum 0.01-0.03 and inevitable admixtures and nickel - rest. |
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Method to manufacture ribbed shells Previously on a shell sheet they make grooves by pressure working with a rotary tool to form a flash at two sides of the grooves. Welded ends of ribs are made as sharpened by shape of the groove. Then the sharpened ends of ribs are arranged in grooves of the sheet, and the shell sheet is welded with ribs at two sides of ribs using the flash as an additive material. The groove is made with depth from 0.5 to 0.6 of sheet thickness. |
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Part blank is made by butt welding of at least one first and one second plates. Plate contains at least partially steel substrate and preliminary coating, containing layer of intermetallic alloy in contact with steel substrate coated with layer of aluminium alloy or alloy based on aluminium. Layer (19, 20) of metal alloy is removed from edges (36) in the direct vicinity to zone (35) of metal welding. Layer (17, 18) of intermetallic alloy is kept on place. Above of at least part of zone (35) of metal welding the ratio between carbon content in zone of metal welding and carbon content in substrate (25, 26) of the first (11) or second (12) plate which has maximum carbon content Cmax, is from 1.27 to 1.59. Welding blank (37) is heated such that to obtain the metal of welding zone (35) with completely austenite structure, the said welding blank is hot formed and heated to receive the steel part, the produced steel part is cooled with regulated rate. |
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Device and method for linear welding of thin-sheet ribbed panel Holes are made on the panel, uniformly along lines of welding while ledge-shape tenons are made on said ribs. Said ribs are placed on the panel. Said ribs are locked at this position while extending tenons are bent. The panels are fitted at table plate supports shaped to segments while ribs fit in V-like grooves of said supports. The panel is locked clamps to perform laser tack of ribs. Then, extensions of tenons are welded to perform laser welding of the ribs through panel sheet. Claimed device comprises table (1), plate (2) with supports (3) shaped to segments with grooves (4). Said clamps are composed of angle pieces (5) and clips (6). Supports (3) are provided with V-like grooves (7) with their axes aligned with lengthwise axes of welded ribs (8). Angle pieces (5) are located in grooves (4) of supports (3). Panel (9) has rectangular holes (10) aligned with ribs (8) provided with tenons (11) located opposite said holes (10). |
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Production of shell from structural complex-alloyed cold-shaping steel Performed are calibration, recrystallization annealing and preliminary machining of preset-size blanks of shells and rings. First strain hardening of shell blank is conducted at rotary drawing in several passes with intermediate recrystallization annealing while second one consists in quenching and tempering, rotary drawing and annealing to decrease the strain. Rotary drawing of conducted to get the shell bulged edges. Ring blanks are subjected to quenching, tempering and final machining to get the edges for ring welding of appropriate depth and length. After welding, produced welds are subjected to low-temperature tempering by HF currents. |
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Control over welding of pipelines from high-strength pipes with controlled heat input Invention relates to welding of pipelines from high-strength pipes. Pipe end edges are grooved for welding at the ratio between total grooving width and depth of welding elements making 1.3 to 2.0. Elements are assembled. Preheating is executed at 170-200°C. Said elements are arc welded to make a circular butt joint over the pipe perimeter. Note here that thermal cycle parameters are controlled in welding whereat heat input to metal varies from 0.8 to 1.2 kJ/mm. Weld beads are applied to make the butt weld with the ratio between depths of previous and next beads makes 1.0-2.0. Note also that every pass is performed by parallel application of two beads, temperature between applied weld beads varying from 170 to 220°C. Weld is cooled at the rate of 150-200°C by covering with heat-insulation belts to be removed after butt temperature of 50°C. |
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Method for obtaining composite items with internal cavities by explosion welding Three-layered pack is composed with arrangement between plates from titanium of a copper plate with thickness ratio of titanium-copper-titanium layers of 1:(0.75-1.0):1 at titanium layer thickness equal to 1-1.2 mm. Titanium layer is installed with a welding gap above the lower copper plate. With that, the copper plate is provided with internal cylindrical cavities filled with low-melting metal removed after explosion welding. An explosive charge is located on the surface of the upper titanium plate, and explosion welding of the obtained assembly is performed. Low-melting metal is removed from internal cavities and annealing of the welded workpiece is performed for formation of solid diffusion intermetallic interlayers between titanium and copper at the temperature exceeding the temperature of contact melting of copper and titanium. |
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Machine knife for processing of food products This invention can be used for making of knives for cutting machines. Said knife has main part (10) of first material (12) and cutting part (20) of second material (22) with at least one blade (24). Second material (22) has higher hardness as compared with said first material (12). Cutting part (20) is connected with said main part (10) along the butt (26). Proposed method comprises the steps that follow. Base (30) is made from third material (32) of high heat conductivity. Main part (10) is laid on base (30) so that datum surface of the main part (10) and base top surface are arranged, in fact, in parallel while butt (26) adjoins the base (30) top surface. Cutting part (20) is made by building second material (22) on first material (12) along said butt (26). Base (30) doubles as a mechanical support for second material (22) being built on. Cutting part (20) is finished to make at least one blade. |
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Production of steel pipes with help of laser welding Invention relates to production of steel pipe with the help of laser welding. Welding is executed with the help of multiple laser beams, each having spot diameter of 0.3 mm or more on open pipe upper surface. Multiple laser beams are arranged to make the sum of lengths of spots of multiple beams. Spot lengths extend perpendicular to welding line on steel strip surface to make 0.5 mm or more. Multiple laser beams are arranged so that the spacing between centres of spots in direction of welding line makes up to 5 mm. |
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Method of manufacturing of axisymmetric welded pressure shells Shell pipe blanks are made out of structural alloyed steels for cold-forming. The shell blanks are subjected to the strain hardening by the rotating drawing by several transitions. At the last transition the shell blanks are subjected to the thermal strain hardening by quenching with tempering with the blank heat fixing on the expanding mandrel, grit blasting of the external and internal surfaces, rotating drawing and annealing. The lathe turning is performed with formation of the welded edges. The shell and rings is assembled on the expanding mandrel with removable shim with butt joint clearance 0.15÷0.2 of thickness of the welded edges with fit-up of the butt edges by means of diametrical tension within range of the elastic deformations by value (0.1÷0.15)% of actual length of the edge circle. Automatic welding is made with consumable electrode by single pass with through penetration of the welded edges. The low temperature tempering and X-ray testing of the welds are performed the welded rings are machined with production of the buttress thread, the shell is hydraulically and pneumatically tested. |
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Induction-butt welding of various-configuration channels Invention relates to welding of various configuration channels and can be used for butt welding of pipes, rails of overlap welding of bands. Blanks surfaces are heated and contracted at preset force. Heating to required depth is performed by butt inductor. The latter is composed of a flat inductor shaped to profile of surfaces to be welded together. But inductor is arranged between welding surfaces to heat solely the surfaces to be involved in making of the weld. Inductor is removed from welding area before contraction of said surfaces. |
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Production of steel sheet and steel sheet thus made Invention relates to production of steel sheet articles from different-depth steel sheet or strips. Billets are welded together along the butt to get the weld (7) composed by edges of steel sheet or strip workpiece. To rule out loss of quenched structure produced by heating to austenitising temperature, at least one edge of sheet or strip (8, 9) is coated before welding with thick fluid or solid powder or aerosol-like matter including at least one component increasing the strength of the weld (10). |
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Automatic welding of fixed circular butts in located horizontal plane Invention relates to automatic welding of fixed circular butts in horizontal plane. Invention can be used for welding pipes of refractory material of the VNS-16-grade. Pipes are jointed. Made joint is fixed by squeezing along butt edges. Ply of activation flux AF-71 as the mix dissolved in ethanol is applied the surfaces of said edges. Tungsten electrode arc is fired and displaced along said edges. In preparation of the weld, 1 mm deep mark with the angle of edges opening making 45 degrees in made in the butt between pipes. |
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Device to couple two guide sections Invention relates to devices for butt-to-butt connection of sections of a guide for suspended movable hoisting mechanisms and similar devices consisting of two halves. The sections are coupled with the help of bushes welded to their ends. At coupling the sections, their bushes are matched and a bolt is passed through them with a nut being screwed onto its protruding end. The end section of a weld joint, which connects the bush with the guide section wall, extends sidewards from the bush by the distance of 10…30 mm from it at the angle of 15°…45° to the longitudinal direction of the guide section. The weld joint shall be continuous at the transition into the end section extended sidewards, the said section shall be straight or bowed in the zone where the angle with the main section is formed. |
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Method of electric contact welding of metal plates with coating Metal plates are pressed by electrodes and conduct preliminary current pulse between them. For these plates welding electrodes with work part in form of cone with top angle from 100° to 140° are used. By means of the specified work part the electrode penetration to the metal plate surface and electric contact between electrodes and metal plates are ensured. After conduction of the preliminary current pulse the pressing force is increased and main current pulse is conducted. |
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First, a shell with an outside end thickening of a cylindrical shape and a spherical bottom of a variable cross section is made of an O-bar of high-strength steel like SP-28 or VP-30 of a rolled plate. A reinforced throat is made from carbon steel 35. The thickness of a weld edge of the throat is chosen in the ratio of 2:1 to the thickness of the shell weld edge. The structure is assembled in a welding and assembly device with a removable pad so that the coincidence of axes and an annular manufacturing clearance at the butt, which is equal to 0.10…0.16 of the thickness of the shell weld edge, is provided. Gas-shielded welding is performed. |
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Method and device for wire welding Invention relates to welding of metal wires. Welding is performed with the help of laser source to make the weld, in fact, not extending beyond the wire radial cross-section. Prior to welding, at least one of wires to be welded together is subjected to annealing in hot gas flow and/or, in welding, produced weld point is subjected to annealing by hot gas flow. |
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Invention can be used in power plant engineering at manufacturing of corrugated walls of welded transformer bodies with extensive surfaces of active cooling. Reinforcement rods are laid on the corrugations on both sides of a wall and are fixed by holders. The edges are clamped and are held at welding by welding jaws. A filler wire is supplied to the gap between the rods and the corrugation parallel to the rod being welded. Supply of the filler wire is stopped, and the filler wire end between the rods and the corrugations is melt by an arc along with welding of the rods in the point of their contact with the corrugation. At the moment of filler wire melting, the end of the filler wire is torn away from the weld puddle by a reverse motion of a feeding unit. The corrugation edges are welded to form a common weld puddle. After welding is finished, the welding torches together with wire feeding unit are moved to the next corrugation or the wall is moved by a step to get the next corrugation in the welding position. |
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Manufacturing method of welded thin-wall conical shell with longitudinal corrugations Shell segments with longitudinal corrugations and bent edges are formed. Segments are arranged on a base with lodgements for corrugations and pre-fixed on the base. After that, a stiff crimp-on frame is arranged on the base coaxially to it above the segments. Then, final fixation of segments and electron-beam welding of longitudinal joints of segments is performed in a vacuum chamber along bent edges with their further local heat treatment. Welding of joints and their heat treatment is performed first in one joint along the whole perimeter of the shell, and then, subsequently for the rest joints. Welding is performed in a pulse mode with certain parameters. Local heat treatment of a weld is performed by heating the weld with a scanned electron beam. After welding and heat treatment of all joints is completed, the finished shell is cooled, unfastened and removed from the base. |
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Method of laser arc orbital welding Method means simultaneous action on the external surface of the welded pipe samples of the laser beam and arc in shielded gases. Arc is generated by consumable electrode with creation if the common welding pool. Preliminary depth of embedding of the laser beam focal plane relatively to the external surface of the welded samples is set equal to (5±0.5 mm), and distance between axes of the laser beam and electrode is set equal to (3±0.5 mm). Fusion penetration is performed with beam power ≥10 kW. Inclination angle of the welding torch relatively to the laser beam is adjusted within range from 30° to 60° with change speed of the inclination angle of the welding torch relatively to the laser beam determined depending on welding speed and radius of the welded pipe samples. As the shielding medium the gas mixture containing active and inert gases is used. |
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Manufacturing method of vacuum arc-extinguishing chambers (vec) Invention can be used at manufacture of vacuum arc-extinguishing chambers (VEC) for vacuum circuit breakers for the rated voltage of 110 kV and higher. Assembly of portions pre-soldered with the first solder metal and having one or more non-soldered seams between them is performed. The second solder metal is laid with lower fusion temperature than that of the first solder metal. Sealing of the VEC made in a vacuum furnace is performed. Gas is pumped out of the furnace volume with additional exposure at the temperature of not more than 100°C with duration that is sufficient for removal of gas from inner volume of the VEC being made through unsoldered seams. Heating is performed to the degassing temperature of VEC portions at the rate chosen from a condition providing the pressure inside VEC of not more than 10-2 Pa with exposure at the same temperature. Short-time heating and exposure is performed at fusion temperature of the second solder metal. After heating is completed, seams are sealed. The method involves non-stem pumping-out and sealing. |
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Process can be used at production of titanium structures by friction welding with mixing. Titanium sheets (802, 804) are welded together to make the blank with several cast zones of welds (918). Said blank is arranged between female die section and cover section. Female die section is heated to heat said blank. Compressed gas is fed in space between cover section and female die section to press said blank into female die for form the component. Cast zones of welds feature preset relative depth after component forming making from 1.1 to 1.25 so that metal sheets and formed component feature several, in fact identical, characteristics. Said characteristics are selected from the group composed of strength, fatigue properties, crack and rust resistance, impact strength and grain size. |
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Method of electric arc welding of fixed girth seams at pipelines Electric arc welding method for fixed girth seams at pipelines involves translational movement and transverse vibrations of a welding torch with an electrode with longer treatment of the edges and correction of basic welding modes in the respective bevelling point depending of the change of the joint's geometry. Longer treatment of the edges being welded by the welding torch with the electrode is performed simultaneously with the application of additional pulses of voltage and current to the basic welding current and voltage. The value of the voltage and current pulses is by 10-12% greater than the specified basic values of voltage and current and the pulses' duration is equal to the time of the electrode staying at the edge in the position 0-5 hours during 0.1-0.15 s in the position 5-6 hours during 0.4-0.5 s. |
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Pipeline weld joint (versions) Set of inventions relates to pipeline welds. Proposed assembly consists of metal pipes with protective coating applied on their inner surfaces and bush composed of cylindrical section and conical section arranged in symmetry. Said bush is arranged inside the pipes with thrust rings secured rigidly thereat at equal distance from the bush ends. Rubber sealing cups are arranged between thrust rings and bush conical sections. At least three thrusts are symmetrically secured at bush surface at its central section at equal distance from bush ends. heat insulating layer is applied on the bush cylindrical section while sealing material is applied on the bush conical sections. It differs from known designs in that said thrust have skewed ledges to allow an automatic alignment of pipes at fitted them on to said bush. Said thrusts feature decreased cross-section below ledges to reduce heat transfer to the bush while rubber sealing cups have conical resilient outer jacket. Maximum OD of the latter is larger than ID of welded pipes while minimum OD is smaller than pipe ID. |
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Connection consists of two pipes welded with each other and a metal bushing arranged inside featuring a cylindrical groove provided in the central portion and annular grooves in the end-face areas and anticorrosion coating on the surface except the cylindrical groove, with heat-insulation material and setting stops in the cylindrical groove, with sealing elements in the annular grooves and sealing material in a gap between pipes and the bushing. A split ring made of non-combustible heat-insulation material is used as the insulation material. A split metal ring with protrusions in the form of a semi-sphere and air volume under the protrusions is used as the setting stops. The split metal ring is installed upon the split ring of non-combustible heat-insulation material and its ends are interconnected by spot welding. The rubber rings featuring end-face surfaces and protruding fins of different height are used as the sealing elements in the annular grooves. A welding seam connects the metal pipes with the split metal ring. A relation of thickness of the split metal ring and the wall thickness equals 1:(3-5). The height of the metal ring protrusions exceeds its thickness. |
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Method to weld lead in semiconductor device Additional pressure is applied with reduction of amplitude of ultrasonic oscillations to zero. At the moment of application of additional pressure to a V-shaped electrode, a higher current pulse is applied, providing for initiation of plastic deformation of connected materials due to jump-like increase of temperature in the connection area. |
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Method of "pipe - pipe plate" assembly connection by friction welding Washer is fitted at the ends of pipe and pie plate, its outer surface having conical and cylindrical parts and ID being equal to pipe flow area. First, pipe edges and pipe plate holes are machined to make inner conical surface of "pipe - pipe plate" assembly with skew angle corresponding to that of washer conical surface. Washer cylindrical part OD is smaller than maximum diameter of said inner conical surface of the assembly. Washer is turned at pressure force and stopped at cogging. |
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Method to weld pipelines without preliminary heating of joints Method involves connection of two and more cylindrical metal pipes, pipe sections, pipe strings by welded ring joint using arc welding along the whole pipe perimeter. Each welded joint pass is performed by parallel overlapping of two string beads. The second string bead covers the first one completely and is an annealing pass. |
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Welded joint of metal pipes with internal plastic pipe In metal pipes the ends of plastic pipes are fixed by an insertion from corrosion resistant steel and by a corrosion resistant steel shell of a backing bush, a flexible elastic sealing gasket is set between the backing bush and the metal pipe. The insertion end is protruding beyond the butt end of a plastic pipe and a sealant is placed in the gap formed by the insertion and the metal pipe end in the place where there is the end of the backing bush not protected by the corrosion resistant steel shell, the sealant provides for the adhesion of the joint of the backing bush, metal pipe and the corrosion resistant steel insertion as well as of the joint of the insertion butt ends and the corrosion resistant steel shell. |
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Welded joint of pipes with inner coating In a welded joint of pipes with inner coating a backing bush is made as a compound one consisting of two bushes with the inner bush being produced from corrosion-resistant steel and the outer bush - from carbon steel. The backing bush is fixed at a pipeline through the annular collar of the outer bush by the pipe welded joint and the length of the inner bush exceeds the length of the outer bush. Ends of the outer and inner bushes are glued to the inner surface of the coated pipes by mastic and the area near the weld seam is filled by foamed material. |
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Metal pipe with internal plastic pipe and thrust bushing In a metal pipe with an internal plastic pipe and a thrust bushing made of a metal pipe lined with a plastic pipe, ends of the plastic pipe are at the distance from the ends of the metal pipe and are fixed by bushings, where the novelty is the fact that the plastic pipe at one side is fixed with an insert from corrosion-resistant steel, remaining inside the metal pipe, and at the other side by the internal end of the shell from the corrosion-resistant steel, with which the thrust bushing is plated inside, at the same time the thrust bushing protrudes beyond the end of the metal pipe and serves to cover the welded joint from the pipeline cavity. Besides, the thrust bushing and the metal pipe are sealed from the pipe cavity by a seal from elastic resilient material. |
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Double-ply pipe, method of its fabrication and steam generator Invention can be used for production of double-ply wall pipes intended, for example, for steam generator of fast reactor. Double-ply wall pipe comprises multiple forming elements, each having inner and outer pipes. Said elements are welded together axially at their ends. Each said welded part of forming elements has a groove of axial length equal to or larger than 1/2 of weld roll width formed by welding thereat. |
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Fan header and method of its manufacturing Invention relates to a fan header and method of its manufacturing. With the help of a laser they cut shells, flanges in the form of a circumference segment, connection flanges and stands in the form of stiffening ribs. Flanges and stands are made with T-shaped slots, and shells - with response cogs. Flanges in the form of the circumference segment, connection flanges and stands in the form of stiffening ribs are welded into metal frames. Frames are fixed to shells by means of joint cogs in T-shaped slots and welding in points of jointing to form sectors. Then the produced structure undergoes hot galvanisation. |
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Method of turbo machine integral wheel Method comprises prefabrication of blades and disc and welding of all blades to disc. Note here that gasket is arranged between the ends of said blades and disc ledges and made from material that features liquidus temperature T l gasket 0 ≥ T l part max 0 + 100 ∘ C , where T l part max 0 is liquidus temperature of materials of both blades and disc and that produces solid solutions after welding. First, current is passed through welded blade and disc and, at a time, the disc is upset to said blade at force Fupset≤0.1σ0.2maxSface, where σ0.2max is conditional yield point of blade and disc material, Sface is area of welded end faces. T f a c e 0 = 0,6 T l part max 0 temperature reached, current is passed solely through said gasket to gasket material liquidus temperature. Thereafter, disc is finally upset. After welding, blades are subjected to appropriate machining. |
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Method of making welded thin-wall conical shells with stiffness ribs This intention is used for making thin-wall conical shells with stiffness ribs by welding. Shell segments are made. Segment lengthwise edges are turned up to make stiffness ribs while segments are placed at detachable support plates arranged on carcass base to make a conical surface with clearance between lateral edges of adjacent support plates. Shell segments are placed at said carcass with turned up edges in clearances between support plates. Segments are subjected to transverse contraction unless edges of adjacent segments are jointed. Then, said segments are locked at said base and welded together along the lengthwise edges from outside. Then, detachable carcass support plates are withdrawn. Produced shell is withdrawn from said carcass together with detachable plates. Produced shell is machined. Welded shell has stiffness ribs made integral with the material of segments to up the strength. |
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Method of butt locking of different-thickness parts Invention relates to welding, particularly, to electron beam welding vacuum of different-thickness parts. Said butt locking joint is made between large-depth part, lock base being made at weld edge end, and smaller-depth part to be jointed thereto. Note here that lock base is skewed at 45°≤α≤60°, while welding is effected with butt penetration through entire depth. Lock base can be skewed straightly or in zigzag manner. |
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Method of producing welded thin-wall conical shell with lengthwise crimps Invention relates to production of welded thin-wall conical shell with lengthwise crimps, used for example as a heat shield of gas turbine engine nozzle. Shell segments are formed. Said segments are arranged at the bed shaped to truncated cone and furnished with the flange placed at larger-diameter end and supports arranged at said conical surface along generating lines. Segments crimps are placed at supports and locked at the bed. Then, stiff squeezer carcass composed of conical frame consisting of end flanges is arranged coaxially at said bed over its segments. Larger-diameter end flange is shaped to ring. All said flanges are interconnected by lengthwise strips with pressure elements arranged thereon. Frame ring-like flange and bed flange are tightened together. Then, segments are finally locked by thrusting them by pressure elements against conical surface. Lengthwise edges of adjacent are welded to unlock made shell and to remove it from the bed. |
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Method of assembly and mill for assembly of i-beam by welding Invention relates to method and mill for production of welded I-beam. Proposed method allows the welding of four-flange seams by argon arc in one pass. Proposed mill comprises bed 1, hydraulically driven rolls 2 with reversible electric drive for setting and centring of beam wall and fitting the beam to welding start position, clamping rolls 3 to centre top flange relative to beam wall, welding heads 5, main hydraulic clamp 6 with roller, bridge 7, supports 8, 10 with hydraulic drives to mounting welding heads, inlet roll table 9, electrically driven propulsor 11 composed of pull roller with drive motor 12. Governor 14 is connected in main motor circuit to control pull roller shaft rpm, that is, the welding rate. |
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Welded blank for forming car body parts Invention relates to blanks intended for cold forming of structural parts, in particular, car body components. Proposed blank consists of parts welded of steel sheet, band or strip selected proceeding from strength and formability. Components of the part are composed of figures welded in straight lines. Welded seams are arranged in the lines of projection along welded seams of said components on blank side with shorter seams. Blanks feature sizes with machining allowances at the edges to be welded. To optimise cutting-to-length, the components are shaped to figures formed by straight lines with extreme points that feature regular shape (rectangle, trapezoid, parallelogram, right triangle) with due allowance for shape of sheet, band or strip. |
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Method of making welded blank for forming car body parts Invention relates to blanks intended for cold forming of structural parts, in particular, car body components. Proposed blank consists of parts welded of steel sheet, band or strip selected proceeding from strength and formability. Components of the part are composed of figures welded in straight lines. Welded seams are arranged in the lines of projection along welded seams of said components on blank side with shorter seams. Blanks feature sizes with machining allowances at the edges to be welded. |
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Invention relates to construction, particularly, to pile foundations laid in permafrost soils. Proposed method comprises cutting of the ends of pile elements. After cutting, pile elements are assembled. Then, four hexahedral reinforcing straps are welded to pile butt surface outer surfaces by angular weld seams over the entire perimetre. Welding zone is heated. Weld beads are laid for welding. Then, weld joint is cooled down. Thereafter, postwelding thermal treatment of weld seam is effected. |
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Method of making rotor brush seal Invention can be used for making rotor brush seals with the help of electron beam. Circular base and circular thrust plates are assembled to make circular mandrel for wire to be wound thereon and pressed there against by clamping circular rings. Wire is cut over circular outer surface while wire and appropriate seal elements are rigidly jointed together. Note here that pasty solder is applied thereon along the two metal strips so that the latter surround outer circular surface of said seal elements. Strip ends are welded together to make temporary rings. Wire, thrust and clamp rings outer ends are welded to inner surface of appropriate temporary ring. Welding is performed step-by-step with electron beam heating via temporary ring outer surface to temperature of solder binding agent sublimation, then to solder solidus temperature with holding unless formation of solder-to-wire joint and, further, to liquidus temperature with holding to welding termination. Ring base is withdrawn to separate thrust plates to obtain two sets of seals. |
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Multiarc welding of welded blanks Invention relates to multiarc welding of welded blanks for making car body parts by cold forging. First, current and rate of first arc welding are selected proceeding from penetration into the entire depth of blank and fusion isotherm on blank surface on welding side. Selected are the number of arc, current of every next arc and distance there between so make fusion isotherm width for every arc on blank surface at weld side complies with isotherm width on welding side of every previous arc while arc crater diameters in welding bath are smaller than welding bath fusion isotherms on the side of crystallisation front of welding bath fusion isotherm. First arc electrode is set 65-75° to welding direction while electrodes of the next arcs are set at 105-115° to said direction. Blanks are butt welded at water-cooled appliance in atmosphere of protective gases at constant current and with separate supply of the arcs. |
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Welding bug and method of welding of two pipes Invention relates to welding and may be used for welding of two pipes in laying of pipelines. Welding bug comprises welding torch 3 arranged to turn about first and second horizontal axes 21, 23 and to displace between working position whereat said torch is located at flute 19 and turned-off position whereat said torch 3 is spaced from said flute. Control lever 7 is connected with torch 3 to displace it between said positions and to turn about first axis 21. Torch 3 can turn in reverse direction about second axis 23. Both axes are mainly parallel with tangent to pipe cross-section at welding point. |
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Invention relates to production of shaft for turbine and/or generator by welding and to shaft thus made. Shaft element 5 of one central part side confining its circular surface relative to rotational axis 2 is removed to produce at least one exposed cavity 11 in at least one cylinder 3 in the limits of left tube-shape rib 13. Two shaft elements 5 are located and aligned along rotational axis 2 to make hollow cavity 15. First tubular seam 17 is produced by arc welding into narrow clearance. Through hole 18 is made outside of one of two shaft elements opened into said hollow space 15. Quality of said first seam 17 is estimated from inside of said hollows space 15 during or after welding with the help of radiation receiver 19 or radiation source 19a inserted via through hole 18 in hollow space 15t. |
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Method of automatic pipe welding Invention relates to automatic argon-arc welding of pipes and can be used for welding of long-length variable diameter pipes for nuclear reactors. Welding is carried out by automatic extrusion. After welding passes required for seam formation, extra pass is performed equal to 0.9 of main pass turn. |
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Method of making tubular radiators and welding device Invention relates to welding, particularly to production of tubular radiators thereby. Proposed method consists in that at least one pipe 31 of one head part 3, 4 and at least one pipe 5 of radiators 2 consisting of head parts 3, 4 including pipes 31 and tube 5 arranged there between are positioned in contact welding device. They are retained in end position and connected by contact welding with mean frequency currents at welding duration smaller than 100 ms. Device comprises at least two stations 30 for contact mean-frequency current welding, each including four electrodes 6-9. Two electrodes 7, 9 surround the pipe while two electrodes 6, 8 surround branch pipe 31. Welding stations 30 can operated simultaneously. Every welding station 30 allows welding duration smaller than 100 ms and can be controlled separately. |
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Method of producing of distributor Invention relates to production of gas turbine engine distributor. The latter represents ring sets of fixed or rotary shape vanes that make divergent channels and can be used in aircraft engineering, machine building, etc, for attachment of vanes to said rings. In locking of vanes and rings in welding and assembling device, outer and inner rings are fitted at appliance base, Vanes are arranged along circumference of bearing ring. Retainers fitted at said bearing ring the vanes are locked against the turn. Vanes are pressed to bearing ring arranged under vanes by lock ring with rubber seal fitted on centering posts. Then, case is set and produced closed space is filled with inert gas. Then, laser welding is performed. Mix of argon and helium represents said inert gas. At least three equidistant retainers can be mounted at bearing ring. |
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Method of producing welded article Invention relates to electric welding of primarily thin-sheets articles from different-thickness and chemically inhomogeneous pipes. Pipes are aligned. Edges are arc tacked and annular seam is arc welded over pipe end face by short-time current pulses. Tacking and welding are made simultaneously by several fixed heat sources composed of torches or electrodes. Heat sources are spaced apart so that heat contact between live arcs is inhibited. Every heat source is connected separately to its power supply. |
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Method of welding large-sized metallic shells Invention relates to oil and oil-refining industries and may be used in development of oil processing equipment, particularly, in assembly of large-sized metallic tanks, say, separators, settlers, oil storage tanks, etc. Proposed method comprises butt hidden-arc welding of metal sheets with forced feed of flux from above and below of weld seam. Then cylinders are rolled from welded sheets. Then butt is welded long the cylinders with forced feed of melt from above and below of weld seam to produce cylindrical shell. Cylindrical shells are arranged at rolls to make their end surfaces face each other. Butt hidden-arc welding of cylindrical shells is carried out with forced feed of flux from above and below of weld seam. Note here that arc zone is filled with the melt between the shells by feeding the melt from inside of shells. In welding the shells are rotated. |
Another patent 2551305.