Other welding or cutting and working by laser beam (B23K15)

Electron-beam welding method of heterogeneous metals // 2615101
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

Stringer connecting method with covering by beam welding at stringer panels manufacture // 2614358
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

Device of electron beam gun r-250 // 2594932
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

Device for determination of energy density distribution and control of electron beam focusing // 2580266
FIELD: machine building.SUBSTANCE: invention relates to device for determination of energy density distribution for controlling electron beam focusing at electron beam welding. Device comprises controller 1 and converter 2 of cross energy distribution of electron beam to analogue signal. Converter 2 comprises cylindrical case 3 with open end 4 and closed end face 5, slot diaphragm 6, collector 7 of primary and secondary electrons 8, separating collector shell 9. Slit diaphragm 6 is located inside the housing 3 converter 2 in its end 4, electrically connected with said housing and has N1 radial slots with width h1 for differential measurements and N2 radial slots with width h2 for integrated measurements cross electron beam energy distribution so that h2 > h1 and N1 > N2 ≥ 1. Collectors 7 and 8 are interconnected electrically and isolated from housing 3 by means of separating shell 9. Manifold 7 is made in form of body of revolution with decreasing cross-section area in direction from bottom of separating sleeve to said slit diaphragm, is connected to input of load resistor 10, output of which is connected to housing 3. Manifold 8 is made in form of hollow cylinder, is installed inside separating shell 9 and aligned therewith, and is electrically connected to collector 7, which is output of said analog signal intended for its processing controller 1.EFFECT: technical result is reduction of losses of electrons as result of their secondary emission due to change angle of reflection of electrons from collector of primary electrons.1 cl, 3 dwg

ethod of turbine rotor manufacturing out of nickel heat-resistant alloy // 2571673
FIELD: machine building.SUBSTANCE: 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.EFFECT: assurance of operability of rotor structure at temperature up to 750 degrees, increased reliability of the welded joints, increased weld and base metal strength.4 cl, 1 tbl

ethod of electron beam welding of nonmagnetic metals and alloys // 2570270
FIELD: process engineering.SUBSTANCE: invention relates to machine building, particularly, to electron beam welding. Claimed process comprises part-through penetration of the parts (4) butt (3) by electron beam (2) and induction of constant magnetic field inside welding parts of maximum magnitude in the weld root. Beam (2) and penetration channel tip (11) are deflected along the butt or in opposite direction.EFFECT: higher quality of nonmagnetic metals and alloys welds, enhanced performances.4 dwg, 1 ex

ethod of electron beam welding // 2569608
FIELD: metallurgy.SUBSTANCE: intermittently registered is the roentgen radiation from penetration channel root part in the planes transverse with penetration channel between the planes located from different sides and at equal distances relative to plasma core. Control action is generated by amplitude and phase of roentgen radiation intensity in frequency equal to that of registration.EFFECT: stabilized penetration depth.3 dwg

Control over beam focusing at electron welding of metals and device to this end // 2567962
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding. In-phase oscillation of electron beam focus and oscillation of lengthwise beam deflection in frequency band of 300-2000 Hz are executed in sine of loner law. Simultaneously, secondary current signal is measured in the circuit of electron collectors and processed by synchronous accumulation process. Delay of processed signal relative to current signal in deflecting coils. Focusing current is controlled by supporting said delay at permanent level corresponding to definite magnitude of electron beam specific power. Claimed device comprises electron collector 1, shift source 2, load resistor 3, deflecting coil 16 current meter 4, first and second ADC 5 and 6, synchronous accumulation unit 7, DAC 8, PID-controller 9, focusing coil 15 current control unit 10, deflecting coil 16 current control unit 11 and generator 12 of saw or sine oscillations.EFFECT: higher quality of weld making.2 cl, 5 dwg, 1 tbl

ethod of electron beam welding of circular butts // 2561626
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding of circular butts, particularly, to welding by scanning electron beam and can be used in machine building. First, beam sweep path is aligned with butt being welded. Electron beam is split to several pseudo beams. The latter are distributed along circular butt and scanning is conducted in closed circular path in one direction. During intermittent transfer of electron beam to welding points circular butt is crossed multiple times between said points in zigzag line not extending beyond the preset zone of thermal effects on butt both sides.EFFECT: decreased thermal influence on central section of welded article, lower residual strain and stress that cause hot and cold cracks.4 dwg

ethod of manufacturing of tine, and tine // 2556807
FIELD: machine building.SUBSTANCE: method of fork lug (18) manufacturing for hoisting devices with, in principle, horizontal in the work position fork blade (5), and adjacent to it via fork bend, in principle, vertical fork back (20), that is equipped with connecting elements (2, 3) for transportation devices, at that fork lug contains several connected parts means that at least some parts are welded with each other. At that parts of the fork lugs are welded by means of the electronic beam welding and/or laser welding. Weld between the adjacent surfaces of the parts is made from both sides over surface to minimum depth 15 mm.EFFECT: increased lug strength.11 cl, 16 dwg

Alignment of electron beam with ring joint butt (versions) // 2552824
FIELD: process engineering.SUBSTANCE: invention relates to electron-beam welding of ring butts and can be used in various branches of machine and instrument building. This process comprises alignment of electron beam with ring joint butt. Mutual location of the beam and ring joint butt is defined by check points. For this, said butt is scanned by ellipsoid-like scan with larger diagonal 2a≈2.2884R, smaller diagonal 2b≈1.7988R, where a is ellipsoid larger axis, b is smaller axis, R is ring joint butt radius. Four check points of scan crossing with said butt are defined whereat sequential time intervals there between are equal. In compliance with second version, said butt is scanned with sweep shaped to regular polyhedron. The number of check points equals twofold number of polyhedron ribs. Sizes of polyhedron (n - number of sides, R1 - radius of circle circumscribed around polyhedron, R2 is radius of circle inscribed in polyhedron) are set so that all points of intersection of polyhedron ribs with ring butt makes equal circular arc angles on butt circle.EFFECT: precise alignment of beam spin axis with ring butt axis, higher quality of welding.3 cl, 8 dwg

Electron beam welding unit // 2547367
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding under effects of magnetic fields induced in welding article. Proposed device comprises electron beam gun, focusing system, deflectors, generator to scan electron beam across and along the butt, unit to guide electron beam to said butt, electron gun electric drive, compensating magnetic field source and X-ray transducer with flat-field collimator. The latter is fitted at said gun so that projection of collimating slot on article surface is aligned with gun optical axis and located parallel with the weld butt. Besides, this device comprises appropriate processors of X-ray transducer signals. Said transducer controls said compensating magnetic field source composed of, for example, electromagnet or two current sources including lead-ins arranged above and under the article in symmetry about the weld in the area of its maximum temperature.EFFECT: compensation for induced magnetic fields, higher precision of alignment of the weld and article butt.3 cl, 2 dwg

Connection of first component with second component with inclined orientation of connection ledges and assembly of two said components // 2545973
FIELD: process engineering.SUBSTANCE: invention relates to production of assembly obtained by connection of first structural element (1) with second structural element. First structural component (1) is configured by making of the set of long ledges (3) on its connection surface (2). Every ledge (3) has axial line, end and base. Axial line at the end of every ledge (3) is directed at the angle to perpendicular to connection surface (2) nearby the ledge base while angular orientation of axial lines extending through said ends varies with said set of ledges (3). Then, first structural element and multiple setting elastic laminate plies are bonded to input ledges (3) in at least several setting elastic laminate plies to solidify said plies to get second structural component.EFFECT: higher hardness of the assembly of structural elements.13 cl, 5 dwg

anufacturing method of welded thin-wall conical shell with longitudinal corrugations // 2541328
FIELD: metallurgy.SUBSTANCE: 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.EFFECT: invention allows simplifying a manufacturing process of thin-wall shells, enlarging technological capabilities by obtaining corrugated conical shells and providing high accuracy of parameters of the obtained welded structure.6 dwg

Electron-beam welding method of heterogeneous metal materials // 2534183
FIELD: metallurgy.SUBSTANCE: method involves the direction of an electron beam to a welded joint on its face side. The electron beam is diverted during welding towards the material with a negative thermoelectric potential at an acute angle φ(0) to the joint. A provision is made for the diversion from the joint of a beam axis on the reverse side of the welded part under an action of magnetic fields of thermoelectric currents at an angle equal to the above angle φ(0). The value of the angle φ(0) is determined depending on a charge and mass of an electron accelerating voltage, magnetic induction on the joint surface, thickness of the welded part and a coefficient considering parameters of the joint and heating temperature for each pair of heterogeneous materials.EFFECT: invention allows improving the quality of weld joints from heterogeneous metals and alloys of large thickness with no lacks of penetration throughout the joint thickness.2 dwg

ethod of electron beam welding // 2532626
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding. Welding is executed with through penetration and electron beam energy adjustment. In welding, through current pulse frequency and length are registered. Electron beam welding is performed with electron beam oscillation in frequency range of 300-2000 Hz by sine or linear law. Electron beam energy is adjusted to maintain mean length of pulses or the product of mean through pulse length by pulse frequency at definite level that ensures required weld formation.EFFECT: higher accuracy and reliability of welding adjustment with through penetration of 5-40 mcm deep metal articles.3 dwg

Forming of butt between large-depth parts from titanium alloys to be jointed by electron-beam welding // 2527566
FIELD: metallurgy.SUBSTANCE: proposed method comprises making of backing of allowance of one of the parts. Said backing is removed at machining after butt welding at vertical position of the beam. Backing depth and width equal 0.25-0.35 and 0.10-0.15 of butt depth, accordingly. Mark 0.004-0.006 of butt depth is made on back of backing opposite the butt to evaluate visually the absence of bridging by smelting rate.EFFECT: high-quality weld.2 dwg
ethod of electron beam welding // 2527112
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding and can be used for making butts of thick-sheet structures in various machine building fields. Proposed method consists in that edges of structure elements are assembled line-on-line with clearance. Welding is performed in vacuum with electron beam scanning for forming of weld root and part of its cross-section while other part of weld cross-section on face surface is built up by filler. Note here that one of edges is skewed and clearance between edges is increased towards face side while electron beam scan angle is shifted towards skewed edge. Clearance between edges on back side may no exceed 0.5 mm while clearance between edges on face side makes 1-2 mm. Electron beam is scanned in circle of diameter d=(3/2)b-(1/2)a with centre shift from unskewed edge to skewed edge of Δ=(a+b)/4, where: a is clearance between edges on back side, b is clearance on face side.EFFECT: higher quality of welding of thick-sheet structures.3 cl

Electron-beam welding // 2522670
FIELD: process engineering.SUBSTANCE: invention relates to electron-beam welding. Proposed method comprises applying of local magnetic field to parts butt, directing of electron beam to said butt to form penetration channel and electron-beam welding of parts at bottom position with part-through penetration. Applied is magnetic field its direction being perpendicular to butt plane. Electron beam is directed at acute angle to the interface selected to make electron beam enter the penetration channel at 90°±15°, to form beam curvilinear path and to direct electron beam nearby penetration channel bottom at 0÷30°.EFFECT: higher quality of weld joint.1 dwg

Operative control method for electron-beam welding // 2519155
FIELD: electricity.SUBSTANCE: electron-beam welding is carried out with operative control of the electronic beam specific power and focusing degree, at that the welding is made with electronic beam oscillation within the frequency range from 300 up to 2000 Hz according to sinusoidal or linear law; in the process of welding the secondary current signal in electron collector circuit is measured and subjected to filtration and rectifying, Then the filtered and rectified secondary current signal or input signal is processed by synchronous storage method and the delay time of this signal is measured in regard to current signal in deflecting coils. At that the focusing current is controlled by maintenance of the above delay value at permanent level corresponding to the preset value of the electronic beam specific power.EFFECT: improving quality of welded seam in the mode of deep penetration by oscillating electronic beam.2 cl, 6 dwg, 1 tbl
Production of cages for prosthetic cardiac valves from commercially pure titanium // 2514765
FIELD: metallurgy.SUBSTANCE: proposed process of production of cages for prosthetic cardiac valves from commercially pure titanium comprises assembly and soldering of drawn wire and plate and thermal treatment. Prior to assembly, wire is annealed in vacuum furnace at 550-600°C for 30-40 minutes and cooled with furnace. After soldering, the cage is annealed in vacuum furnace at 550-600°C for 1.5-2 hours and cooled with furnace.EFFECT: better manufacturability, lower labour input, high mechanical properties.1 tbl, 1 ex

Electron beam welding unit // 2510744
FIELD: process engineering.SUBSTANCE: invention relates to electron beam welding units used for high-quality vacuum welding of microwave instrument units and parts. Proposed unit comprises vacuum chamber with vacuum system. Vacuum chamber houses indexer and optoelectronic system with triode electronic gun arranged there above. Said optoelectronic system can displace vertically and horizontally relative to indexer. Detachable diaphragm is arranged between cathode and gun focusing electrode. Gun second anode is equipped with tight video camera and illumination system fixed thereto. Optical prisms are arranged on holder inside said second anode. Aid holder has opening for beam path and can displace in horizontal direction. Said indexer supports parts holders than can inclined through 0° to 90° and turn periodically. Vacuum system incorporates oil-free pumps.EFFECT: high quality, reliability and efficiency of microwave instrument small parts.3 cl, 2 dwg

ethod of butt locking of different-thickness parts // 2510316
FIELD: process engineering.SUBSTANCE: 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.EFFECT: higher quality of seam.3 cl, 6 dwg

ethod of electron beam welding control // 2495737
FIELD: process engineering.SUBSTANCE: invention relates to electron-beam welding, particularly, to welding control methods used in welding of critical complex-geometry parts with higher requirements to weld joints. Electronic beam is intermittently withdrawn from welding area. It is scanned across the butt. Electron emission beam current is registered at every point of scanning to define weld butt joint position by current variation. Dependence of current on electronic beam displacement is defined to estimate electronic beam geometrical parameters. Additionally, scanning path across the butt in formed weld butt area is constructed. Weld butt surface relief is registered to estimate seam quality and to correct welding parameters after combined the main and additional scanning paths.EFFECT: instantaneous estimation of weld seam quality and electronic beam parameter variation, higher quality of weld joints.3 cl, 4 dwg

ethod of electron beam welding // 2494846
FIELD: process engineering.SUBSTANCE: method of electron beam welding with control over electron beam specific power in welding can be used for production of welded parts of structural materials. Variable component signal is isolated from the secondary current oscillation spectrum including frequency band incorporating spectral density peak to be statistically processed. Empiric densities of said signal distribution in amplitude band are constructed. Then, depending upon measured empiric distribution densities, e.g. dispersion, means square deviation, modal empiric distribution density in a mode or ratio between distribution density to means square deviation or to dispersion and appearance of empiric distribution density, focusing current is set to comply with maximum specific power of electronic beam.EFFECT: higher electron beam welding performances.7 dwg, 1 ex

Electron beam welding unit // 2486041
FIELD: process engineering.SUBSTANCE: invention relates to welding. Vacuum chamber 1 accommodates working platform to support article to be welded, vertical guides 9, 10 with moving crossbar 6 secured thereat and provided with rotary support 3, and electron beam gun 2 arranged at said rotary support 3. Support 5 is mounted at crossbar 6 to reciprocate there along. Carriage 4 is mounted at said support to displace in direction perpendicular to support travel. Rotary support 3 is arranged at carriage 4. Working platform can displace. Vertical guides 9, 10 are secured at lateral walls 7, 8 that make angle. Arrangement of electron beam gun at vacuum chamber angle increase article processing zone to add to unit efficiency.EFFECT: expanded range of welded articles.3 dwg

Electron beam welding control device // 2469827
FIELD: process engineering.SUBSTANCE: proposed device comprises electron gun control device 12, electron beam 1 connected to HV power supply 2, control electrode power supply 3, vacuum chamber 6 to house moving platform 7 with article drive 8 composed of motors 9, 10 and control unit 11, pulse duration separator, article drive speed separator, comparator, and article speed setting unit. Output of article speed setting unit is connected to 1st input of article drive speed separator 12 and one input of comparator with its output connected to motor control unit 11 and second input connected to article speed separator. The latter has its 2nd, 3rd, and 4th inputs connected to outputs of voltage and current transducers and pulse duration separator. Input of the latter is connected to current transducer output.EFFECT: invariable welding parameters, heat conditions and welding quality.1 dwg

Electron beam welding control device // 2467849
FIELD: process engineering.SUBSTANCE: invention relates to welding. Proposed device comprises electron gun 1 connected to negative terminal of HV power supply 2, control electrode power supply 3, electron gun control voltage switch on/off unit 12, and vacuum chamber 6 movable platform 7 with article transfer drive 8 with motors 9,10. Electron beam current pulse shape and duration generator 13 is connected by its output to control electrode power supply input and, by its input, to electron gun control unit output.EFFECT: stable parameters of molten pool.2 cl, 3 dwg

ethod of making radial-flow compressor impellers // 2459980
FIELD: machine building.SUBSTANCE: proposed method comprises jointing main and cover discs together by soldering with sold solder and thermal treatment. In compliance with this invention, annular grooves are made on disc surface in area of process allowance.EFFECT: reduced radial warping.2 dwg

Joint of pipeline from stainless steel with vessel from titanium alloy and method of its realisation // 2450197
FIELD: metallurgy.SUBSTANCE: joint of a pipeline from stainless steel with a vessel from titanium alloy comprises an adapter made in the form of a bushing, the lower part of which is made according to a spherical shell shape and is connected to it by means of electronic beam welding. The upper part of the bushing is installed coaxially inside the pipeline and is connected with it by means of high-temperature vacuum soldering. The adapter is made from a niobium-based alloy alloyed with at least one of the metals selected from the following group: tantalum, molybdenum, vanadium, titanium. Electronic beam welding of the adapter with the vessel shell is carried out with beam displacement along the shell joint surface with the adapter towards the adapter.EFFECT: invention provides for tightness and high strength of connection.6 cl, 2 dwg, 1 tbl

ethod of welding by electron beam // 2448822
FIELD: process engineering.SUBSTANCE: method may be used for making critical welded structures in machine building. Parts of be welded are arranged with clearance. Adding material is fed into said clearance. Grooves and adding material are washed by electron beam and common molten pool is produced. Clearance width is selected proceeding from the condition 1.1d≤h≤1.2d, where h is clearance width and d is adding material diameter.EFFECT: higher quality of welded joints.3 dwg

ethod of welding by electronic beam // 2448821
FIELD: process engineering.SUBSTANCE: invention relates to electron-beam processing. Pre-welding is performed without grooving and with part-through penetration. Face bead width and height are defined. Grooving is made for main welding to prepare grooving cavity 5 and main welding is carried out on transmitting electron beam through grooving cavity 5. Grooving before main welding is performed to produce groove 6 nearby grooving cavity base with width and height, at least, 15% larger than those of face bead after pre-welding.EFFECT: high-quality welded joints between large-thickness articles.2 dwg

Device to retain components in method for repair of single-block turbine wheel blade // 2446931
FIELD: machine building.SUBSTANCE: invention relates to a device for retention of components during repair of a blade of a single-block turbine wheel by means of electron-beam welding of an insert with a blade along the joint plane. The device comprises facilities to retain the wheel and facilities for controlled retention of the blade and the insert. The facilities for controlled retention of the blade and the insert comprise a support, where facilities are placed to retain the blade and the insert so that the space above the joint plane makes it possible for the electron beam to pass through. The relative position of the blade and the insert is controlled with the help of facilities installed on a single support, letting the electron beam pass through.EFFECT: device differs by simplicity and reliability.19 cl, 12 dwg

ethod of electron beam welding of ceramic parts // 2434726
FIELD: process engineering.SUBSTANCE: invention aims at preventing cracking of ceramic parts by decreasing mechanical strains in weld seam. Note here that sea, sections the most remote from weld seam are subjected to minimum thermal effects. Parts to be welded together are placed in vacuum chamber. Pressure of 5 to 20 Pa is created in said vacuum chamber. Defocused electron beam from defocused electron beam source is directed to areas adjoining the joint to heat them to temperature lower than that of melting temperature of the parts to be welded together. Then butt joint is welded by focused beam. Well joint formed, focused beam source is cut off. Unfocused beam power is reduced to zero during time interval defined by type of ceramics and that of parts being welded. After curing in vacuum, welded parts are withdrawn from chamber into atmosphere.EFFECT: ruling out of ceramic part cracking.1 dwg

ethod of electron beam welding of nonmagnetic metals and alloys // 2433024
FIELD: process engineering.SUBSTANCE: invention relates to method of electron beam welding of nonmagnetic metals and alloys. Proposed method comprises penetrating the butt of parts 3 to be welded together by electron beam 2, inducing magnetic field inside said parts and forming presser geometry of electron beam and penetration channel in displacing electron beam over part thickness. Blind penetration of but 4 is performed. In welding, beam 2 is deflected across the butt to vary shape and sizes of seam root 6 at constant size of weld seam apex. For this, variable magnetic field is induced on the side of seam root.EFFECT: higher quality of welded joints, control over weld seam shape.3 dwg

ethod for electron-beam welding // 2433023
FIELD: technological processes.SUBSTANCE: invention relates to the method of electron-beam welding and is designed to produce non-detachable welded joints. The method includes generation of an electronic beam (3), its deflection and displacement relative to the gun axis, arrangement of the beam focus inside a welded part (1) and maintenance of the beam (3) focus position along the thickness of the welded joint as permanent. Deflection and displacement of the electronic beam (3) from the gun axis is carried out with alternating magnetic field. The field is developed with supply of AC current to the lower portion of the welded part via current contact jaws (4), which are arranged at two sides symmetrically to the joint at the distance between them, equal to the width of the welding joint in the upper portion of the welded part. The magnetic field is displaced in direction of welding with the speed equal to the speed of electronic beam. The value of the alternating current supplied via current contact jaws (4) is selected provided that the width of the joint in the root zone is equal to the width of the joint in the upper part of the welded joint.EFFECT: method makes it possible to increase quality of the welded joint by improvement of the root part of the joint and elimination of the defect area in the middle part of the joint.2 dwg

ethod and device for butt welding of metal sheets without filler materials using clamps, at least, one clamp suitable for producing two or more pressure magnitudes // 2432243
FIELD: process engineering.SUBSTANCE: invention relates to butt welding. Proposed device comprises movable welding head, support table 1 and clamp 3. Said clamp incorporates two clamping elements 4, 5 that act independently. At least one clamping element 4, 5 is suitable for use with two or more pressure magnitudes. Additional horizontal elements 11 serve to press on metal sheets to be welded together and strained unless reliable contact between surfaces to be welded is provided.EFFECT: preventing local deformation of weld seam and sheet.22 cl, 2 dwg

Procedure for forming discrete welded coating on blade body of turbo-machine // 2420610
FIELD: metallurgy.SUBSTANCE: procedure consists in local pad weld of coating on at least part of blade body and in dimensional processing. Regularly distributed crossing strips are pad-welded along surface of the blade body and form a net at their crossing.EFFECT: raised operational characteristics of blades.25 cl, 1 dwg

ethod of repairing surface defects of gas turbine blade body // 2419526
FIELD: process engineering.SUBSTANCE: invention may be used for repair of parts made from high-alloy refractory steels and alloys in aircraft engineering, ship building and power engineering. Turbine blade body is, first, conditioned for powder to be applied thereon by microplasma evaporation, said powder containing 70% of nickel-based filler and 30% of high-temperature solder. High-temperature soldering is carried out. Blade body section, a transverse strip covering section to be repaired, is heated by scanning electron beam to solder solidus temperature all over blade thickness. Then, repaired section is heated to temperature 100°C-120°C higher than solder solidus temperature and said temperature is maintained in pulsed mode for 1 minute. Note here that intermittent heating is performed for 5-7 s and temperature is reduced to 1000°C and maintained for 10-15 s.EFFECT: complete recovery of parts shape, higher efficiency of repair and longer life of recovered parts.2 cl, 1 dwg

ethod of turbo machine integral vaned disk repair and pilot piece to this end // 2417869
FIELD: process engineering.SUBSTANCE: invention relates to repair of turbo machine integral vaned disk. Vane repair is performed by method of electron-beam welding of insert. Vane repair begins from machining damaged zone to shape it as required. First sample piece is made. Second sample piece corresponding to insert is welded to first sample piece corresponding to insert and shaped as required to produce specimen for starting the work. Said specimen is checked for quality. Is quality complies with acceptance requirements, the insert is welded to zone to be repaired. Note here that the same electron-beam welding machine is used without changing its operating parametres. Now, repaired zone is again machined.EFFECT: higher strength of vane.14 cl, 7 dwg

Electron-beam welding device // 2405664
FIELD: process engineering.SUBSTANCE: invention relates to equipment intended for assembling and electron-beam welding to be used in aerospace and aircraft engineering, transport and chemical industries. Proposed device comprises bed 1 with guides 2, front stationary driven slide 3 with centraliser 13 designed for mounting the shell to be welded, carriages to place shells to be welded together thereon that can move in the bed guides, rear driven slide 4 with clamping device and electron-beam gun. Portal guides 6 are arranged parallel to bed guides 2. Local chamber 8 is arranged on carriage to move in portal guides 6. Electron-beam gun is arranged on local chamber 8 furnished with end seals made up of circular chambers with their inner spaces communicated with working medium feed system. Said chambers accommodate driven clamping devices. Carriage supports represent swinging elements.EFFECT: higher accuracy of welding.3 cl, 10 dwg

ethod of welding materials // 2404887
FIELD: process engineering.SUBSTANCE: invention relates to the method of welding materials by high-power radiation sources, e.g. laser, plasma or electron beam, and can be used for welding thin-sheet and diverse materials in various industries. Prior to welding, material edges to be welded are pre-melted. Welding is performed with simultaneous addition of modifiers into melting zone, said modifiers being made up of nanopowders selected from refractory compounds, e.g. nitrides, carbonitrides and oxides. Concentration of nanopowders material makes less than 0.1% by weight of welding bath. Said nanopowders can represent suspensions.EFFECT: welding of homogeneous and composite materials, higher quality of welded seams.5 cl, 2 dwg

ethod of produced small-weight blade for gas turbine engine // 2401727
FIELD: process engineering.SUBSTANCE: invention relates to machine building and can be sued for fabricating gas turbine engine blades. Blade body workpiece is machined to produce a part comprising body back with cavity and jointing groove along the edges of said cavity, and tail end. Blade pressure surface is produced with shape and sizes mating body back jointing groove. Blade pressure surface is fitted in said jointing groove to weld both together. Welded seam is treated thermally and blade is subjected to finishing. Blade workpiece has base elements arranged on tail end and back face that make base plane. Prior to machining, workpiece is fixed relative to basic plane. Machining, welding and finishing are effected with orientation along basic elements. Welding is performed by electronic beam in vacuum with minimum electronic beam power on the side of jointed parts that allows penetration of welding bath in jointing slot of not over 0.2 to 0.4 mm.EFFECT: proposed blade allows ease of manufacture of smaller-weight gas turbine engine.9 cl, 8 dwg

ethod and device for fabrication of 3d products // 2401179
FIELD: metallurgy.SUBSTANCE: proposed method comprises uniform preheating of powder material and solidifying it by irradiation by electronic beam to fuse said material. Preheating comprises substage of scanning the powder layer preheating area by electronic beam along paths distributed over said preheating area. Scanned parts are separated by minimum safe distance.EFFECT: preventing undesirable effects of summing in preheating area caused by consecutively scanned paths.14 cl, 3 dwg, 1 tbl

Procedure for welding anode with contact and metal-ceramic insulator of chamber on plasma focus // 2400338
FIELD: machine building.SUBSTANCE: invention refers to procedure for welding anode with contact and metal-ceramic insulator of chamber on plasma focus and can be implemented at fabrication of chamber on plasma focus. A solid copper anode is installed in a hollow metal-ceramic insulator with a collar; there is created a gap between the anode and an upper end of the insulator. A copper contact with a gap between the contact and the insulator collar is forced on another end of the anode. Value of the gap between the contact and the collar of the insulator is adjusted by means of installation of copper pads into the gap between the anode and the upper end of the insulator. An assembled structure is placed into the chamber; further, the anode, contact and metal-ceramic insulator are simultaneously electron-beam welded.EFFECT: high quality of welding and increased percent of accepted production output.2 cl, 1 dwg, 1 tbl

anufacturing method of bling of gas turbine engine with electron-beam welding // 2395376
FIELD: machine building.SUBSTANCE: invention refers to electron-beam welding, namely to manufacturing method of bling of gas turbine engine with electron-beam welding. Manufacturing method of bling of gas turbine engine with electron-beam welding from workpieces in the form of blades with shanks and with rim elements with base elements and with interface planes which, during assembly, cross on common axis, includes assembly of workpieces of bling on assembly and welding device. During assembly the workpieces are arranged on installation rings, thus adjusting them on base elements at fixture points. In slots of hold-down crowns there arranged are inlet and outlet process inserts which are tacked to workpieces. Workpieces are elastically pressed to each other. Installation rings are led out from under workpieces, thus leaving the assembled bling on elastic fixtures. Axis of electronic beam is adjusted on viewing elements and interface planes. Workpieces are tacked to each other and welded on interface planes at their elastically being pressed.EFFECT: invention allows decreasing the deformation of bling and internal stresses in the rim, improving assembly accuracy and quality of the product.7 cl, 4 dwg

ethod of guiding electron-beam gun beam onto jointed surfaces of welded parts // 2393069
FIELD: process engineering.SUBSTANCE: invention relates to machine building and can be used in fabricating whatever essential parts of gas turbine engines. Proposed method is implemented as follows. Laser head is arranged on electron-beam gun prior to welding in open atmosphere. Light beam of laser head is directed into joint of parts to be welded together. Electron beam axis is aligned with that of light beam and laser head is removed from electronic-beam gun. In welding closed surfaces, aiming elements are made on parts to be welded together and light beam is directed into joint by said aiming elements. In welding closed surfaces, aiming elements are made in the form of bench holes in jointed surfaces. Light beam is directed into each said hole to detect light beam passage through said holes using temporary plate preliminary fitted in parts joint end.EFFECT: higher accuracy of welding.3 cl, 2 dwg

ethod of protecting optical system components against raising dust in electron beam welding // 2391190
FIELD: process engineering.SUBSTANCE: invention relates to method of protecting optical system components against raising dust in electron beam welding and can be used in welding units with optical or optic-electronic process control means. Optical system comprises electron gun (1) with mirrors (2 and 3) fixed thereon, light source (4) in case (5) and video camera (6) in case (7). Mirrors (2, 3) deflect optical axis (8) of light source (4) and optical axis (9) of video camera (6) from directions (arrows (10 and 11), respectively) of line of sight of welding bath (12) from locations of said elements through angles α1 and α2. Light source (4) in case (5) and video camera (6) with case (7) are turned through angle of deflection of its optical axis by said mirrors to screen both elements from direction of line of sight of welding bath.EFFECT: simple and reliable protection.2 cl, 1 dwg

ethod for soldering of item, mostly heat exchanger // 2362657
FIELD: technological processes.SUBSTANCE: invention may be used for soldering of plate-finned and tubular heat exchangers in vacuum, for instance in aircraft engine engineering and other fields of machine building. Connected parts are serially heated in vacuum by means of scanning laser beam to the temperature of solder melt and are further cooled. At every stage heating is carried out till the temperature of change of phase condition of powdery solder components with a delay after every heating stage. At the first stage heating is carried out up to the temperature of binding solder decomposition. At the second stage solder is heated up to temperature of powder sintering, at the third stage - to solidus temperature, at the fourth stage - to liquidus temperature of solder. Uniformity of temperature field on surface of soldered parts is controlled remotely by infrared imager and is corrected when necessary.EFFECT: provides for quality of soldering items with deep through channels with powdery solders.3 cl, 1 dwg

ethod of brazing heat exchanger with scanning electron beam and device to this end // 2355526
FIELD: welding works.SUBSTANCE: present invention relates to brazing laminated-finned and pipe-shaped heat exchangers in a vacuum and can be used in aircraft engine-building and other fields of engineering. In the method of brazing a heat exchanger with a scanning electron beam, the brazed objects are put into a vacuum, heated, held and then cooled. The degree of irregularity of heating is determined and temperature equalisation is then done on the brazed surface until attaining a given brazing temperature by varying the brazing parametres. The device for implementing the method has a vacuum chamber with an illuminator, an electron beam gun with a two-dimensional beam deflection system and power supply unit, and a sweep generator of the electron beam, connected to the two-dimensional beam deflection system of the beam gun. A control unit is connected to the power supply of the electron beam gun and the sweep generator of the electron beam. The device also has a thermal radiation detector and an information computer system, connected to the thermal radiation detector and made with provision for displaying the temperature field of the brazed surface of the object.EFFECT: use of the invention provides for stable, quality brazing and increases output of the brazed objects, with deep end-to-end channels.9 cl, 1 dwg
 
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