Method of producing welded thin-wall conical shell with lengthwise crimps. RU patent 2507047.
 Rails lining in contact butt welding machine / 2503529Invention relates to contact butt welding. Manipulator with distance transducers fitted thereat is fed into rail ends abutting area to correct rail end clamped position with the help of servo gears by driving them vertically and horizontally. Said manipulator is made abut tightly on rolling surface and side face of one of the rails by electromagnets. Said one rail is taken to make a reference base. Used error signal represents the difference in spacing from reference base to rolling surface and from reference base to side rail faces measured by distance transducers. |
 Method of assembly and mill for assembly of i-beam by welding / 2501635Invention relates to method and mill for production of welded I-beam. Proposed method allows the welding of four-flange seams by argon arc in one pass. Proposed mill comprises bed 1, hydraulically driven rolls 2 with reversible electric drive for setting and centring of beam wall and fitting the beam to welding start position, clamping rolls 3 to centre top flange relative to beam wall, welding heads 5, main hydraulic clamp 6 with roller, bridge 7, supports 8, 10 with hydraulic drives to mounting welding heads, inlet roll table 9, electrically driven propulsor 11 composed of pull roller with drive motor 12. Governor 14 is connected in main motor circuit to control pull roller shaft rpm, that is, the welding rate. |
 Method of producing of distributor / 2494849Invention relates to production of gas turbine engine distributor. The latter represents ring sets of fixed or rotary shape vanes that make divergent channels and can be used in aircraft engineering, machine building, etc, for attachment of vanes to said rings. In locking of vanes and rings in welding and assembling device, outer and inner rings are fitted at appliance base, Vanes are arranged along circumference of bearing ring. Retainers fitted at said bearing ring the vanes are locked against the turn. Vanes are pressed to bearing ring arranged under vanes by lock ring with rubber seal fitted on centering posts. Then, case is set and produced closed space is filled with inert gas. Then, laser welding is performed. Mix of argon and helium represents said inert gas. At least three equidistant retainers can be mounted at bearing ring. |
| Method of producing welded article / 2492977 Invention relates to electric welding of primarily thin-sheets articles from different-thickness and chemically inhomogeneous pipes. Pipes are aligned. Edges are arc tacked and annular seam is arc welded over pipe end face by short-time current pulses. Tacking and welding are made simultaneously by several fixed heat sources composed of torches or electrodes. Heat sources are spaced apart so that heat contact between live arcs is inhibited. Every heat source is connected separately to its power supply. |
 System for assembly of automotive bodies or their assembly units / 2489242Invention relates to machine building. Proposed system comprises assembly station and assembly line. Assembly station comprises mounting and assembling means. Mounting means serves to mount and lock body components at assembly position. Assembly means is intended for welding jobs. Mounting means comprises several pairs of mounting and clamping appliances. Said pairs are arranged on line both sides at assembly station. Every pair is equipped with multiple mounts and clamps D for interaction with body components. Lateral mounts and clamps move along assembly line between their closed and open working positions. Every said lateral mount and clamp structure comprises rigid support and frame to carry aforesaid mounts and clamps D resting on said rigid support. Platform of every lateral mount and clamp structures can displace in lengthwise guides on one side of assembly line between assembly station and wait position. Rigid support comprises base platform and two interconnected columns. Lengthwise and crosswise positions of columns differ for rigid supports made for different body types. Platform making a part of every mount and clamp structure is identical for all aforesaid rigid supports. |
 Strip assembling and welding machine / 2488474Invention may be used at tube welding mills for production of high-quality 20-60 mm-dia tubes from stainless steel. Shears comprise fixed blades secured to bed and moving blades arranged on sides of housing displacing in bed vertical guides. Machine bed is composed of two halves with vertical slot there between to accommodate housing with shears. Housing drive is composed of two-slider drive mechanism. Said housing doubles as one of said sliders and is articulated with another slider furnished with horizontal displacement drive. Welding device copper shoe is equipped with horizontal displacement drive. Welding head is provided with rolls and cutter arranged there between to reinforce weld seam. Strip end reduction mechanisms are arranged to displace in machine bed horizontal guides with the help of slider. Said slider houses wedge mechanisms for strip end clamping and blades to cut odd strip parts with deficient weld seam. |
 Method of measuring upset force in contact butt welding / 2486998Invention may be used in strip welding at special contact welding machines by continuous burning-off or resistance. Top and bottom box-like measuring elements are fitted in welding machine in place of jaws. Said elements comprise strain gages integrated in measuring half-bridges glued on their vertical walls. Thickness of said vertical walls are selected with due allowance for relationship between period of their intrinsic oscillations at impact load and upset duration that makes, at least, 0.01. Strain gages of every half-bridge are connected in series opposition. Point of integration of every half-bridge is arranged at, at least, one metre from welding zone. Bridge unbalance current is measured at horizontal strain of aforesaid vertical walls by upset force transferred via clamped part. |
 Electron beam welding unit / 2486041Invention 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. |
 Method of preparing strips for welding at continuous metallurgical plants / 2482948Invention may be used in strip welding at specialised machines incorporated with high-efficiency continuous metallurgical units, for example, tube welding and profile-iron bending stands, and pickling lines After cutting the strip front end, shears top support is stopped at bottom position to bring steadier jaws together. Jaws chamber allows gripping only rear end of the strip there between. Shears top support is lifted along with gripped rear end of the strip. Note here that strip front stub end fall into the box. Then, steadier jaws are pulled apart to place rear end onto shears bottom support knife. Now, welding bed with torch is displaced to butted ands to weld them together. |
 Working equipment / 2481935Invention relates to working tool for assembling and welding work pieces together. Table 8 comprises retainer 16 to extend beyond the table for contact with machined workpiece. Location station 2 serves to clamp workpiece at said table while station 4 is intended for workpiece machining. Element 20, 24 is intended for clamping workpiece and bringing it contact with retainer while clamp 22, 26 serves to secured workpiece to table. Location station 2 comprises pressure drive 48, 50 to displace aforesaid clamping element. |
| Method of assembly and mill for assembly of i-beam by welding / 2501635 Invention relates to method and mill for production of welded I-beam. Proposed method allows the welding of four-flange seams by argon arc in one pass. Proposed mill comprises bed 1, hydraulically driven rolls 2 with reversible electric drive for setting and centring of beam wall and fitting the beam to welding start position, clamping rolls 3 to centre top flange relative to beam wall, welding heads 5, main hydraulic clamp 6 with roller, bridge 7, supports 8, 10 with hydraulic drives to mounting welding heads, inlet roll table 9, electrically driven propulsor 11 composed of pull roller with drive motor 12. Governor 14 is connected in main motor circuit to control pull roller shaft rpm, that is, the welding rate. |
 Welded blank for forming car body parts / 2500515Invention relates to blanks intended for cold forming of structural parts, in particular, car body components. Proposed blank consists of parts welded of steel sheet, band or strip selected proceeding from strength and formability. Components of the part are composed of figures welded in straight lines. Welded seams are arranged in the lines of projection along welded seams of said components on blank side with shorter seams. Blanks feature sizes with machining allowances at the edges to be welded. To optimise cutting-to-length, the components are shaped to figures formed by straight lines with extreme points that feature regular shape (rectangle, trapezoid, parallelogram, right triangle) with due allowance for shape of sheet, band or strip. |
 Method of making welded blank for forming car body parts / 2500514Invention relates to blanks intended for cold forming of structural parts, in particular, car body components. Proposed blank consists of parts welded of steel sheet, band or strip selected proceeding from strength and formability. Components of the part are composed of figures welded in straight lines. Welded seams are arranged in the lines of projection along welded seams of said components on blank side with shorter seams. Blanks feature sizes with machining allowances at the edges to be welded. |
 Method of pile elongation / 2499655Invention relates to construction, particularly, to pile foundations laid in permafrost soils. Proposed method comprises cutting of the ends of pile elements. After cutting, pile elements are assembled. Then, four hexahedral reinforcing straps are welded to pile butt surface outer surfaces by angular weld seams over the entire perimetre. Welding zone is heated. Weld beads are laid for welding. Then, weld joint is cooled down. Thereafter, postwelding thermal treatment of weld seam is effected. |
 Method of making rotor brush seal / 2497645Invention can be used for making rotor brush seals with the help of electron beam. Circular base and circular thrust plates are assembled to make circular mandrel for wire to be wound thereon and pressed there against by clamping circular rings. Wire is cut over circular outer surface while wire and appropriate seal elements are rigidly jointed together. Note here that pasty solder is applied thereon along the two metal strips so that the latter surround outer circular surface of said seal elements. Strip ends are welded together to make temporary rings. Wire, thrust and clamp rings outer ends are welded to inner surface of appropriate temporary ring. Welding is performed step-by-step with electron beam heating via temporary ring outer surface to temperature of solder binding agent sublimation, then to solder solidus temperature with holding unless formation of solder-to-wire joint and, further, to liquidus temperature with holding to welding termination. Ring base is withdrawn to separate thrust plates to obtain two sets of seals. |
 Multiarc welding of welded blanks / 2497644Invention relates to multiarc welding of welded blanks for making car body parts by cold forging. First, current and rate of first arc welding are selected proceeding from penetration into the entire depth of blank and fusion isotherm on blank surface on welding side. Selected are the number of arc, current of every next arc and distance there between so make fusion isotherm width for every arc on blank surface at weld side complies with isotherm width on welding side of every previous arc while arc crater diameters in welding bath are smaller than welding bath fusion isotherms on the side of crystallisation front of welding bath fusion isotherm. First arc electrode is set 65-75° to welding direction while electrodes of the next arcs are set at 105-115° to said direction. Blanks are butt welded at water-cooled appliance in atmosphere of protective gases at constant current and with separate supply of the arcs. |
 Welding bug and method of welding of two pipes / 2497640Invention relates to welding and may be used for welding of two pipes in laying of pipelines. Welding bug comprises welding torch 3 arranged to turn about first and second horizontal axes 21, 23 and to displace between working position whereat said torch is located at flute 19 and turned-off position whereat said torch 3 is spaced from said flute. Control lever 7 is connected with torch 3 to displace it between said positions and to turn about first axis 21. Torch 3 can turn in reverse direction about second axis 23. Both axes are mainly parallel with tangent to pipe cross-section at welding point. |
 Method and device for checking shaft weld joint by fitting takeup device in shaft through bore and appropriate rotor shaft / 2496624Invention relates to production of shaft for turbine and/or generator by welding and to shaft thus made. Shaft element 5 of one central part side confining its circular surface relative to rotational axis 2 is removed to produce at least one exposed cavity 11 in at least one cylinder 3 in the limits of left tube-shape rib 13. Two shaft elements 5 are located and aligned along rotational axis 2 to make hollow cavity 15. First tubular seam 17 is produced by arc welding into narrow clearance. Through hole 18 is made outside of one of two shaft elements opened into said hollow space 15. Quality of said first seam 17 is estimated from inside of said hollows space 15 during or after welding with the help of radiation receiver 19 or radiation source 19a inserted via through hole 18 in hollow space 15t. |
 Method of automatic pipe welding / 2496618Invention relates to automatic argon-arc welding of pipes and can be used for welding of long-length variable diameter pipes for nuclear reactors. Welding is carried out by automatic extrusion. After welding passes required for seam formation, extra pass is performed equal to 0.9 of main pass turn. |
 Method of making tubular radiators and welding device / 2495736Invention relates to welding, particularly to production of tubular radiators thereby. Proposed method consists in that at least one pipe 31 of one head part 3, 4 and at least one pipe 5 of radiators 2 consisting of head parts 3, 4 including pipes 31 and tube 5 arranged there between are positioned in contact welding device. They are retained in end position and connected by contact welding with mean frequency currents at welding duration smaller than 100 ms. Device comprises at least two stations 30 for contact mean-frequency current welding, each including four electrodes 6-9. Two electrodes 7, 9 surround the pipe while two electrodes 6, 8 surround branch pipe 31. Welding stations 30 can operated simultaneously. Every welding station 30 allows welding duration smaller than 100 ms and can be controlled separately. |
 Steel cylindrical envelope / 2384381Steel cylindrical shell contains two surfaces made of corrugated sheet, bump of which are mutually perpendicular, herewith bumps of one of cylindrical surfaces are directed lengthwise of cylinder generatrix and vertexes of corrugation, crimps of both surfaces are contact to each other. Additionally ratio of shells parametres are received experimentally. |
FIELD: process engineering.
SUBSTANCE: invention relates to production of welded thin-wall conical shell with lengthwise crimps, used for example as a heat shield of gas turbine engine nozzle. Shell segments are formed. Said segments are arranged at the bed shaped to truncated cone and furnished with the flange placed at larger-diameter end and supports arranged at said conical surface along generating lines. Segments crimps are placed at supports and locked at the bed. Then, stiff squeezer carcass composed of conical frame consisting of end flanges is arranged coaxially at said bed over its segments. Larger-diameter end flange is shaped to ring. All said flanges are interconnected by lengthwise strips with pressure elements arranged thereon. Frame ring-like flange and bed flange are tightened together. Then, segments are finally locked by thrusting them by pressure elements against conical surface. Lengthwise edges of adjacent are welded to unlock made shell and to remove it from the bed.
EFFECT: simplified process, expanded process performances.
6 dwg
The invention relates to the field of welding production and can be used in manufacturing processes of welding methods of thin-walled shells with reinforcements in the form of longitudinal corrugations used, for example, as a heat shield nozzle turbine engines.
Known manufacturing process conical shells, including accommodation welded shells in a conic slabbing frame, transverse compression shell with a combination of welded edges, align its ends and commit it to the desired position with the subsequent welding of joints (SU 1747247, 23 37/04, 1992).
Known also various ways of manufacture of shells with the ribs, containing, for example, the installation shell seat, its fixation, accommodation inside the shell edges of rigidity and their welded to the surface shell (SU 343814, 23 19/02, 1972); wound on rings of rigidity of thin-walled sheet material and weld (SU 841880, 23 37/04, 1981); required forming of thin-walled shells and the weld to her ribs (EN 2082529, 23 37/04, 1997).
The disadvantages of known technical solutions are, as a rule, sufficient complexity of the technological process, the complexity and the complexity of the necessary production equipment, as well as an additional negative impact on the design process as the welding of shells and the weld to shell stiffening ribs. In addition, the known methods do not allow to manufacture corrugated pallet collars. Object of the present invention is to simplify the process of manufacturing thin-walled shells, extending the technological possibilities by obtaining corrugated sidewalls, and high precision parameters of the received structure without additional heat treatment.
The solution of this problem is achieved by the fact that produce formation segments shell with longitudinal corrugations, then place the segments on the basis of which is made in form of truncated cone, with the flange on its end face of a greater diameter and , located on the conical surface along forming. The segments are placed corrugations in cradles, and then pre-recorded on the basis of. After this, on the basis coaxial him on top of the segments are placed hard crimp frame made in the form of a conic frame, consisting of the end flanges, one of which is larger diameter is made by ring, connected by a longitudinal strips mounted with clamping elements. The circular flange of the frame and base flange hugging each other, and then carry out the final fixation of the segments by pressing their clamping elements to a conic surface of the base, welding of longitudinal joints of adjacent segments, received shells and its removal from the base.
The invention is illustrated by drawings, where:
figure 1 shows a segment of the conical corrugated pallet collars;
figure 2 shows the base of the unit for the Assembly;
figure 3 shows a crimp frame;
figure 4 shows a cross-section of the device for Assembly with mounted cowling;
figure 5 shows the cross section a-A figure 4;
figure 6 shows the finished corrugated shell.
Example of implementation of the method.
The proposed method can be implemented, for example, the following device for assembling tapered corrugated pallet collars. Device for Assembly segments 1, ribbed with the formation of a thin-walled conical shells 16 contains a base 2 (figure 2), which is made in the form of truncated cone, with flange 3 of the LPT larger diameter. On the conical surface of the bottom 2 along its branches are located 4 lodgements for the longitudinal corrugations. In those 4, where joining and welding of adjacent segments 1, are longitudinal grooves 5 under the welding seams, and on the ends of these containers are placed liners 6 for input and output of the weld. The device is supplied with fixing elements on the basis of 2 segments 1 collected shells 16, which are located in those 4, where there is no welding segments 1, and are made in the form of a clamp bars 7 and clamping devices 8 type of clamps.
The device also contains a hard crimp frame made in the form of a conic frame (figure 3), consisting of the end flanges 9 and 10, one of which 9, larger diameter is made by ring. Flanges 9 and 10 are interconnected longitudinal slats 11 mounted with clamping elements of 12, who are, for example, in the form of spring, screw etc. clips. Longitudinal slats, 11 are located on the conical surface, that when placing a frame on the basis of 2 conic surface of the base. Liners 6 for input and output of a welded seam can be made to segments 1 collected shells by means of elastic elements 13 located, for example, on the inner surface of the front flange 10.
It should be noted that the number of the cradle 4 on the basis of 2 can be any corresponding to the quantity of corrugated pallet collars, and the number and placement of the cradle 4 with the slots 5 and inserts 6 to conduct welding depends on the amount of collected segments 1, i.e. the number of their joints.
In this example there are two segments of the airfoil with a total number of corrugations - four. Also can be any number of longitudinal slats 11 and 12 hold-down elements of conic frame that depends on the specific technological conditions and materials used.
The method is implemented as follows.
On the basis of the 2 place prepared segments 1 16 shells corrugations in 4 lodgements and fix in those of them, where there is no welding, by means of a clamp bars 7 and clamping devices 8, to install the flange 3 holes 14. Further, on the basis of 2 attached to it segments 1 shell is installed conical mounting frame (crimp frame), the flange 3 grounds and 9 frame contract bolts 15, liners 6 biased to the end segments 1 elastic elements 13. Using pressure items 12, installed on the longitudinal rails 11, is compact pressure segments 1 to the base 2, which can significantly reduce thermal deformation of welding and avoid the subsequent heat treatment. Collected and recorded thus the body moves on the welding place, where welding of longitudinal joints of 17 segments 1 shell, located in 4, where docked to the edge of the adjacent segments. After that removed the bolts 15, open, items 12 and removed crimp frame. clamping devices 8, remove the clamp bars 7 and liners 6 and ready shell 16 (6) is removed from the bottom 2.
Method of manufacturing of welded thin-walled conical shells with longitudinal corrugations, including the formation of segments shell with longitudinal corrugations, segments on the basis of the made in the form of truncated cone, with the flange on its end face of a greater diameter and , located on the conical surface along forming, corrugations in cradles, preliminary fixation segments based on, accommodation on the basis of coaxial him on top of segments hard crimp frame made in the form of a conic frame, consisting of the end flanges, one of which is larger diameter is made by ring, connected by a longitudinal strips mounted with clamping elements, pulling each other ring flange frame and base flange, and then the final fixation of the segments by pressing their clamping elements to a conic surface of the base, welding of longitudinal joints of adjacent segments, received shells and its removal from the base.