Soldering, e.g. brazing, or unsoldering (B23K1)

Head of electric point welding for multi-axis industrial robot and robot containing this head // 2628451
FIELD: electricity.SUBSTANCE: head includes a supporting member with an end portion for attaching to the robot wrist, a pair of welding electrodes held by the arms mounted on the supporting member with the ability to move between open and closed positions, an actuator and an electrical transformer provided with a casing, on different walls of the casing.EFFECT: increasing the compactness and electrical reliability of the device.7 cl, 18 dwg

Application of superflowing with application of powder flux and metal // 2627824
FIELD: metallurgy.SUBSTANCE: powder layer (14) disposed on the substrate (12) of the superalloy containing flux material and metal material is heated energy beam (16) for forming the cladding layer (10) and of a superalloy layer (18) of the slag. Give the molten bath to cool and solidify to form a slag repaired surface of the desired superalloy material. Material is fed in the form of a superalloy wire or strip into the molten bath. Filler material contains only a subset of the extrudate from the elements defining the desired superalloy material. Extruding the filler material in the form of wire or tape may be, for example, nickel, nickel-chromium alloy or nickel-chromium-cobalt.EFFECT: improvement of the application of technology.10 cl, 6 dwg

Soldering compositions // 2627822
FIELD: metallurgy.SUBSTANCE: soldering contains the mixture of powder components, one of which is the first soldering alloy, and the second powder component is the second soldering alloy or metal. The soldering contains the additional powder component, selected from the group consisting of carbides, nitrides, metal oxides and carbon nanotubes. The immiscible while heating alloys are used as the first and the second soldering alloys, the melting temperature of which varies within 10°C.EFFECT: soldering has good thermal fatigue life and low high temperature creep, as well as the high ductility and high plasticity and electrical conductivity.20 cl, 16 dwg
ethod for reconstruction of platforms for compressor blades in gas turbine engines (gte) // 2627558
FIELD: engines and pumps.SUBSTANCE: determine the lines for cutting the platforms for repair. Remove the defective parts along the said line. Fabricate the hard-alloy material plates of thickness not more than 0.9 mm with through slots along the contour, coinciding with the planes of the platform repair cut. Fix them on the cut planes with the requirement to maintain the specified length of the platforms, perform heat treatment and final finishing machining. In this case, after removal of the defective parts of the platforms along the specified line of the repair section, a layer of titanium alloy of a given thickness is cladded onto the repair section, and then the plates are fixed using the induction soldering.EFFECT: method will increase reliability of the product during its operation, increase service life of the blades in 1,5-2 times.5 cl, 3 dwg

ethod of electron-beam welding of a plate with finned surface // 2627553
FIELD: metallurgy.SUBSTANCE: welding is carried out from the side of plate. Preliminary places of welding are applied on the outer surface of plate, coinciding with the places of welding on the finned surface. In welding places single-stage through-holes are made with decreasing diameter in the depth of plate. Welded parts are combined. Pins are set in holes made in plate before contact with the fin. The height of pin exceeds the depth of inner hole in plate. After that, spot welding is carried out in the places where pins are installed. The height of pin protrusion into the outer hole is at least half of its depth. Plate and finned surface can be made of thin-sheeted titanium alloy.EFFECT: minimum values of post-welding deformations, high accuracy of assembly of welded parts, excluding their mutual displacement, and possibility of obtaining quality welded joints in different spatial positions.3 cl, 1 dwg, 1 ex
Flux gel for aluminium soldering and method for its production // 2627538
FIELD: metallurgy.SUBSTANCE: flux in the form of gel contains salt components and a binder in the form of a 2-4% solution of polyisobutyl methacrylate in white spirit with the following components ratio, wt %: chloride magnesium 36-38, sodium chloride 7-8, aluminium fluoride 3-5, potassium fluoride 3-5, potassium chloride is the rest. The pre-mixed salt flux components are melted. After the resulting melt is cooled, the solid flux is ground in the binder to produce colloidal gel.EFFECT: flux gel structure provides resistance to air humidification, convenient spot flux application and good solder spreadability.2 cl, 1 ex
Flux for soldering aluminium // 2627311
FIELD: metallurgy.SUBSTANCE: flux contains components in the following ratio, wt %: lithium chloride 31-33, aluminium fluoride 2-4.5, barium chloride 18-19, potassium fluoride 1.5-3, tin chloride-3-10, potassium chloride is the rest. To obtain the flux, melting of potassium chloride, lithium chloride and barium chloride is carried out at a temperature of 750-770°C and a mixture of potassium fluoride and aluminium fluoride is added to the melt. The melt is poured and colled. The obtained solid alloy is ground and mixed with 3-10% tin chloride. The charge is melted at a temperature of 450-500°C and the fobtained flux is poured into bars.EFFECT: flux provides high spreadability of solder and activation of aluminium surface at solder melting point.2 cl, 5 ex

Device for cooling electrode of contact point welding (cpw) // 2627133
FIELD: electricity.SUBSTANCE: tube for supplying refrigerant is installed in the holder cavity. The electrode shank is made in the form of a collar with the conical surface and is installed with the thrust in the front holder end. A bushing is fixed on the front part of the holder. The electrode is fixed to the holder by means of a union nut having a conical bottom and enclosing the bushing and the collar. The shank is made with a blind cavity, in which the end of said tube for supplying refrigerant is arranged with gaps. Between the ends of the holder and the shank, a sealing ring can be placed, and said tube is mounted relative to the shank end of the electrode with an axial gap. Between the ends of the holder and the shank, a disc or a cover may be provided in the holder cavity, and said tube is installed relative to them with an axial gap. The holder can be made with a blind cavity and have a wall from the front end thereof, and the tube is installed relative to the bottom of said wall with an axial gap.EFFECT: increasing the electrode resistance due to expanding its cooled surface, ensuring the reliable fixation of the electrode on the holder.5 cl, 3 dwg

ethod for welding and building up metal components made of aluminium by the method of arc welding by metallic electrode in the medium of inert gas with pulsed current and pulsed filler wire // 2627088
FIELD: metallurgy.SUBSTANCE: overlay welding is performed using a filler metal wire made of aluminium alloy, whose composition is identical to that of the deposited aluminium alloy parts to obtain rolls of large cross section. Thermal welding cycle is selected from the condition of minimum residence time in the range of weld metal embrittlement aluminium alloy by controlling the pulse rate of the filler wire feeding rate and welding.EFFECT: implementation of cladding without hot cracking.5 cl, 7 dwg

Device connecting steel pipe ends by orbital welding // 2627066
FIELD: technological processes.SUBSTANCE: device consists of guide supports installed on both sides of respective pipe ends in the welding zone and rigidly clamped. The guide supports have an annular recess in the center with a radial bore for passing through and aligning weld pipes. Clamp members for clamping the guide supports with the pipe ends are solidly connected to the respective outer sides of the guide supports diverted from the weld groove. A frame for accommodating welding and test tools adapted for orbital movement around the weld groove is installed to pivot on the weld groove facing inner sides of the guide supports and to rotate at least 360° around the pipe ends.EFFECT: improved quality of welded connection.10 cl, 3 dwg

Electrode holder for resistance spot welding (rsw) // 2626259
FIELD: electricity.SUBSTANCE: electrode holder rod has the longitudinal cavity with the conical bottom, in which the coolant tube is placed with the lateral clearance. From the front end side of the electrode holder, the eyes are provided, between which the electrode in the form of the disc is clamped by means of the fastener. In each of the rod eyes, there are longitudinal channels to supply and discharge the coolant, which are connected together by the common transverse channel, located along the end of each eye. One of the longitudinal channels of each eye is connected to the rod longitudinal cavity at the conical bottom. Another longitudinal channel of each eye is connected to the lateral clearance of the electrode holder rod longitudinal channel. The coolant supply tube is installed with its front end stop into the conical bottom of the cavity through the sealing element, separating the coolant supply and discharge channels. The side surface of the electrode is made as multifacet.EFFECT: disc electrode resistance increase and improvement of its ends connection electrical conductivity with the holder rod eyes.4 cl, 2 dwg

Nickel-base superalloy preweld heat treatment // 2625921
FIELD: metallurgy.SUBSTANCE: preliminaryheat treatment method before welding of Inconel 939 nickel alloy turbine component comprises heating the turbine component to a first temperature in the range from a temperature 35°C (19.4°C) below the phase dissolution temperature γ' and to the onset temperature of the alloy melting and holding at this temperature, cooling at a rate of 1°F (0.56°C) per minute to a temperature of 1,900°F(±25°F) (1,038±15°C) and holding at this temperature, cooling at a rate of 1°F per minute to a temperature 1,800°F(±25°F) (982±15°C) and holding at this temperature. Then, the component is cooled with a velocity 1°F per minute to a temperature from 1,650°F(±25°F) to 1,450°F(±25°F) ((899-788)±15)°C.EFFECT: cracking under deformation aging during welding and subsequent heat treatment.10 cl, 9 dwg, 2 tbl

ethod of electrolytetic-plasma welding of aluminium and its alloys // 2625145
FIELD: electricity.SUBSTANCE: preliminary combining the weld zone in the welded products. The negative potential is applied to them and the weld zone is immersed in the electrolyte. A conductive plate is also immersed into the electrolyte, onto which a positive potential is applied. A voltage is established between the cathode, which is the welded articles or materials, and the anode, which is the electrolyte, in the range 50≤U≤1000 V and discharge current in the range from 1≤I≤500 A. The discharge is ignited between the welded products. The welding time is set for at least 1 second. As electrolyte, aqueous solutions of salts or acids or alkalis with a hydrogen index in the range of 2≤pH≤11.EFFECT: ensuring the welding of products from aluminium and its alloys in a non-inert environment without reducing the technological parameters of aluminium.3 dwg

Electrode holder for resistance spot welding // 2625143
FIELD: metallurgy.SUBSTANCE: first tube for cooling medium supply is installed in the longitudinal cavity of the electrode holder rod. The bolt for fastening the electrode-roller is made with the longitudinal cavity and installed from the shank end face. The rod longitudinal cavity has the conical shaped bottom, opened into the transverse window connecting the cavity of the first cooling medium supply tube to the bolt cavity. The first tube is installed with the rest into the mentioned bottom of the cavity through the sealing element, sealing the lateral clearance of the tube, which is connected by the transverse window to the shank cavity. The second cooling medium supply tube is located in the shank cavity and in the bolt cavity. The ring groove is provided on the outer surface of the bolt, and the ring grooves are provided on the outer surface of the shank, separated from each other by the ring ribs with grooves, shifted in the angular direction in the adjacent ribs. The ring grooves and sealing elements are arranged with the cooling medium ability to circulate in the cooling area.EFFECT: invention increases the efficiency of electrode cooling and its durability, the electrical conductivity of the conical connection the shank-electrode is improved.1 dwg

Electrode holder for resistance spot welding // 2625142
FIELD: metallurgy.SUBSTANCE: tube for the cooling medium supply is installed in the dead-end longitudinal cavity of the electrode holder rod. In the bolt head to fasten the roller electrode, there is the longitudinal cavity opened into the atmosphere, passing into the bolt cavity, filled with the porous material. The bolt is threaded from the shank end in its dead-end cavity, the part of which at the bottom is filled with the porous material. The dead-end longitudinal cavity of the rod is connected by the transverse window to the mentioned shank cavity, filled with the porous material. According to another embodiment of the electrode holder, the bolt is made with the longitudinal grooves, formed on its side surface, and the bolt head has opened into the atmosphere dead-end longitudinal cavity, connected by the transverse windows to the mentioned longitudinal grooves of the bolt. The dead-end longitudinal cavity of the rod is connected by the transverse window to the mentioned shank cavity, filled with the porous material.EFFECT: reduction of the electrode heating and increasing of its resistance, the zero-clearance connection of the electrode to the shank improves its thermal and electrical conductivity.3 cl, 2 dwg
Way of magnetic circuit contact sealing // 2624750
FIELD: electricity.SUBSTANCE: sealing is passed in two steps. At the first step, the indented electrodes are used. These electrodes make it possible to impact the weldments, to produce the required contact area for heat density for sealing and to get rid of the skellering and curvature of rings weldments. Since then, the current impulse is skipped among electrodes. With the result that the thermal power is liberated, metal plates are warmed up within the contact area and their sealing is carried out. At the second step, the electrodes are switched to flat tips and are exerted more pressure. This permits to better impact the weldments and complement their unit package. After that, the second more powerful current impulse is skipped among electrodes. This impulse warms the whole component parts assy through and enhances their ductility property.EFFECT: more compact holding of weldments and of the whole assy and magnetic circuit gaining.2 dwg, 1 ex
ethod of flux-free soldering of aluminium products // 2623543
FIELD: metallurgy.SUBSTANCE: in the soldering zone, silumin-based solder is placed. Product with a solid non-evaporable getter are loaded in the furnace chamber. The heating is carried out under vacuum (1-5)⋅10-3 Pa with periodic holdings at temperature 180-200°C and 520-550°C for 1-5 hours to equalize the temperature field in the product. The product is held at the soldering temperature for 1-5 h. Cooling of the product and the getter is carried out in vacuum with intermediate holding at the temperature of 480-500°C for 1-3 hours for the getter regeneration. Cooling to 100°C is conducted under vacuum, after which the product with a non-evaporable solid getter is cooled in air.EFFECT: conducting the process in substantially non-oxidizing atmosphere to provide tight and strong soldered joints, in particular for high shear density.

Electrode-holder for resistance spot welding (rsw) // 2622192
FIELD: electricity.SUBSTANCE: electrode-holder is pipe-shaped and comprises a cowl joining part with traversal window openings and a tube for refrigerant agent in a hole from the after end side, and from the exposed face side - there is an electrode shank. It rests on the welding clamp with its lateral face. The hollow-core cotter bolt with safety nut on the bolt tapped face is fixedly attached to the lateral face. Moreover, the safety nut is placed between the bolt head end and the nut end where the nut bumps into the welding clamp with the its other end.EFFECT: invention allows to facilitate the interelectrode gap maintenance and to ease down the electrode holder jaw force in welder.1 dwg

Pinch welder gun electrode adapter for resistance spot welding // 2622191
FIELD: electricity.SUBSTANCE: invention refers to pinch welder gun electrode adapter for resistance spot welding. The electrode adapter comprises two inclined stems with shank end for the pinches elements. The pinch welder guns are accomplished at the first stem end, and with the crosscut socket for the electrode shank. The socket is accomplished at the second stem end. There are longitudinal channels from shank ends sides. These channels are open one inside the other. There is a gapped tube for coolant flow in the thimble longitudinal channel of the second stem. At the thimble longitudinal channel bottom there is a secondary longitudinal channel that is open towards the mentioned crosscut socket and hollow space that is accomplished from the second stem exposed face side and lidded; at this hollow space bottom there are longitudinal side slots that are open towards the sideways clearance between the thimble longitudinal channel and tube that is positioned with its front portion at the secondary channel without the sideways clearance and without front portion protrusion into the crosscut socket for the electrode shank. The crosscut socket is accomplished with the crosscut slot that is open towards the stem secondary longitudinal channel.EFFECT: socket and electrode cooling raise by virtue of ended socket walls multisided cooling, the electrode durability increases at the very least 1,5 times.1 dwg

Device for seam electrocontact welding of additive material on surface of flat detail // 2622074
FIELD: electricity.SUBSTANCE: roller electrodes are attached to the axle with the possibility of free rotation in electrode heads. The electrode heads are attached to the carriage, installed with the possibility of moving along the details. The holder is designed to consolidate the flat parts and filler materials with possibility of transverse feed welding zone. The holder is equipped with a movable pusher, with the possibility of bias along with a part in the process of welding. The holder is mounted in one chuck with an axel, and the other in the spindle of the device's rotator. Electrode heads are made in the form of blocks interconnected at an angle of 90°. The axis of rotation of the roller electrodes is located perpendicular to the direction of supply of the electrode heads. The holder is provided with adjusting screws for displacing the pusher together with the part during the welding process to effect its lateral feed.EFFECT: device makes it possible to produce seam electrocontact welding of materials to flat surfaces using automatic feeding of the welding head.3 cl, 5 dwg

ethod for assembling absorber element of nuclear reactors // 2621908
FIELD: physics.SUBSTANCE: method for assembling the absorber element (AEL) of a nuclear reactor includes preparing the shell in the form of a tube, sealing it by argon-arc welding at one end by the lower ferrule having a conical shape, loading the shell by the absorber materials in the form of pellets or powder, fixing the absorber material from the axial displacement with the gasket installation in the powdery state of the absorber material, sealing the shell at the other end by the contact-butt welding by using the upper ferrule containing a weighting part. Fixing the absorber material from the axial displacement is performed by a spring retainer mounted in the compensation amount of the AEL.EFFECT: invention allows to increase reliability of the method for assembling the absorber element and to increase performance while maintaining efficiency of the absorber element.3 cl, 2 dwg

ethod of resistance spot welding (rsw) gun welder electrode cooling and device for its implementation // 2621083
FIELD: electricity.SUBSTANCE: holder is made in the form of two rods positoned at the angle. The shank end is mounted at the end of the first rod for its fixing, and the cross slot is made at the end of the second one, where the shank end of the cooling non-continuous electrode is installed. The rods are made with longitudinal channels for the coolant circulation, cooling the electrode through the wall of the cross slot, open one into the other. The channel of the holder second rod in its bottom area is connected by the window to the mentioned cross slot for supplying the coolant to it, at the bottom of which the cavity is formed with the porous material placed therein. The shank end of the non-continuous electrode is made with the cavity, passing from one side into the electrode rear part cavity, into which its transverse windows connected to the atmosphere are opened. From the other hand, the shank cavity is opened into the cross slot cavity of the second rod holder with the porous material.EFFECT: lowering of the electrode heating level, which increases its resistance.1 dwg

Electrode holder of welding tongs for contact point welding (cpw) // 2618285
FIELD: electricity.SUBSTANCE: holder rod of the welding tong stationary electrode, formed by bending to produce straight sections at its ends and a curved portion between them, has a longitudinal channel for circulating the refrigerant. At one end of the rod there is a cavity, in which a bushing is installed and a fitting is fitted to connect to the refrigerant supplying means and the pipeline. At the other end, a transverse cavity is provided for securing the replaceable electrode. The pipeline consists of two rigid and flexible parts connected to each other. The end of the pipeline rigid part is fixed in the said bushing. A flexible part of the pipeline is located in the channel for circulating the refrigerant of the curved rod section and abuts against the bottom of this channel. In the area of the rigid pipe installation, a transverse window is provided in the rod for withdrawing the heated refrigerant, which is open to the said channel.EFFECT: increasing the reliability and technology of tongs for contact point welding.4 cl, 1 dwg

Device for cooling electrode-cap of contact point welding (cpw) // 2618284
FIELD: electricity.SUBSTANCE: holder is made with a conical lateral surface in the front part and has transverse windows in its rear part. In the axial cavity of the holder, a tube is installed for supplying refrigerant. The electrode-cap attached to the holder has a cavity with a cylindrical and conical surfaces. The conical surface of the cap is located on the conical surface of the holder. In the cavity formed in the front part of the holder, a sleeve is installed that has an end portion and a shank connected to the holder by a threaded connection. In the end part of the bushing, the transverse windows are formed, which are open to the annular cavity formed by the lateral surface of the sleeve and the cylindrical surface of the electrode-cap cavity, passing into its axial cavity. The front end of the refrigerant supply tube is integrally connected to the end portion of the sleeve, and the lateral clearance of the said tube is sealed at its rear end.EFFECT: reducing the length of the holder, has high reliability and durability.1 dwg

ulti-functional unit for grinding and replacement of removable end of the electrodes // 2618045
FIELD: mechanical engineering.SUBSTANCE: device comprises a frame, a drive motor output shaft and the movable balancing block, which is mounted on the frame. The engine is mounted on a mobile unit, the motor shaft passes through the movable block and is connected to the desk, both sides of which have the device for removing the removable ends of the electrodes and a device for grinding them. Drives for removable ends of the electrodes are located on both sides of the table at its outer edges or a frame.EFFECT: implementation of replaceable electrode tips for grinding operations and replacing of the ends on the same equipment unattended.12 cl, 9 dwg
ethod of diffusion welding of tube titan-stainless steel adaptors // 2617807
FIELD: metallurgy.SUBSTANCE: tubular adapter titanium part is telescopically coupled with disposed outside of it tubular adapter part of stainless steel, on the inner surface of which circular grooves are made not more than 0.5 mm. Before welding, the said circular grooves are filled with a slurry of polyvinyl butyral and ultrafine nickel powder. The ultrafine nickel powder content in the slurry is from 61 to 80%. Diffusion welding is carried out at the temperature of 700-764°C. The holding time is not more than 1 min.EFFECT: method reduces the amount of plastic deformation of the tubular adapter titanium part and reduces the amount of brittle intermetallic phases in the diffusion joint.1 ex

ethod of brittle materials cutting // 2617482
FIELD: ceramic industry.SUBSTANCE: invention relates to methods of brittle materials cutting (thermo cracking), such as plates from any type of glass, all types of ceramics, as well as semiconductor materials, and can be used in automotive industry for glasses and mirrors production, in electronic industry, as well as in other industries. Method comprises heating material surface of along cutting line using laser beam, creation of blind material cut along cutting line, additional effect on material surface in cut application area with resilient waves, material surface heating zone cooling using coolant, wherein resilient waves act on material surface in cooling agent action area. Additional effect on material surface is performed, at least, by two sources of resilient waves, which are arranged on material opposite sides across cutting line, wherein waves are produced, which amplitude and frequency are selected under condition of resilient standing wave area generation in material with periodic change of mechanical stresses, combined with heating area, for cut deepening to specified depth or through cutting. Heating zone is formed by pulsed laser beam, and resilient standing wave areas are combined with formed heating zone, wherein laser radiation maximum intensity is combined with time of mechanical stresses maximum unloading. Additionally several pulse laser beam heating zones can be formed to create additional cutting lines.EFFECT: technical result consists in increase of materials cutting speed and increase in cut material thickness.3 cl, 1 dwg
Production of alluminium alloys welded structures with high crack resistance // 2616684
FIELD: metallurgy.SUBSTANCE: invention may be used in production of welded structures of aluminum alloys via friction stir welding, in particular for connecting sheets of Al-Mg system alloys. The alloy sheet crude products are produced through intensive plastic deformation within the temperature range of 150-450°C that provides at least 50% of volume fraction of recrystallized grains with a size of less than 10 microns. Sothermal rolling is then carried out within the temperature range of 150-450°C with a total degree of deformation at least 40% and subsequent mechanical working of the sheet welded edges. Friction stir welding is made. The combination of pre-thermomechanical processing and the following welding ensures uniformity of the sheet welded crude products structure.EFFECT: production of preforms with the same grain size both in the base material and the weld zone ensures high crack resistane of the compound.3 cl, 2 dwg, 1 tbl, 2 ex

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
Production method of titanium-aluminium system composite sheet material // 2614511
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

Assembly on printed circuit board // 2614387
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

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
Bimetallic thin strip and its production method // 2613543
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

Welding stand for longitudinal welded pipes of definite length assembling and welding // 2612881
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
Flux for soldering electrodes of batteries are made from lead alloy // 2611626
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

ethod of combining diamond monocrystal with metals // 2611254
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
ethod of rail bar connection with recovery of continuous welded rail operating temperture at low temperatures // 2610761
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.
ethod arc weld deposition of copper-nickel alloy containing 40 - 50% of nickel onto aluminum-nickel bronze // 2610656
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

Composite consumable components of torch for welding with plasma arc consumable components torch for welding plasma arc // 2610138
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

ethod of large-diameter pipes welding by laser and hybrid laser-arc welding // 2609609
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

ethod for pipe welding with heating by arc regulated by magnetic field // 2609578
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

ethod for determining porosity of metal coating from filler metal powder // 2608859
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

ethod of welding of metal parts // 2608154
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

ethod of using infrared radiation, mirror electric lamps of ikz type // 2608113
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

ethod and apparatus for longitudinal-seam welding of profiled tubes in tube-welding system // 2607885
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
Device for spot welding gun welding tips replacement // 2607501
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
Electrode and electrode holder for resistance spot welding // 2607395
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

ethod of overlapped welding section, method of making overlapped welded element, overlapped welded element and automobile part // 2606667
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

ethod of high pressure vessels welded casings producing from high-strength alloyed steels // 2605877
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

Device for replacement of welding electrode working tip // 2605728
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