2981 results about "Butt welding" patented technology

A method of forming a structural airframe component for an aircraft and an airframe structural component The method includes placing at least two components (1,2) in abutting relationship with each other and joining them together by friction stir butt welding (3), and the structural airframe component comprises a component manufactured according to the method of the invention.

The invention discloses a stainless steel or nickel sheet laser tailor-welding alignment clamping device and a method. The alignment clamping device comprises an XYZ three-dimensional translation RZ one-dimensional rotation motion mechanism, a video monitoring alignment regulating mechanism and a magnet pneumatic clamping mechanism, wherein the stainless steel or nickel sheet laser tailor-welding alignment clamping device can align and position sheets through the XYZ three-dimensional translation RZ one-dimensional rotation motion mechanism and the video monitoring alignment regulating mechanism, and then clamps and fixes the stainless steel or nickel sheets by the magnet pneumatic clamping mechanism to realize the laser tailor-welding of the stainless steel or nickel sheets. The invention can solve the problem of difficult welding of the stainless steel or nickel sheets smaller than 0.3mm in thickness in laser butt welding because the sheets are easy to deform owing to easy deformation property per se and thermal stress, and guarantees the quality of tailor-welded seams.

The invention relates the metallic bond full-automatic all-hydraulic flash butt welding method and device. The method is that the open of each chain link is automatically welded after the metallic bond is knitted to chain. The method comprises the following step: sending the chain link from left end of machine to position of welding under the combined action of main conveyer and subsidiary conveyer, controlling the hydraulic heading equipment with displacement transducer, servo valve and heading valve, preheating, burning, flashing and heading welding, auto removing the burrs, and exporting the finished chain link from the right end of machine. The whole process is the full-automatic all-hydraulic flash butt welding method. The invention possesses the characters of high automation level, high production efficiency, high product quality and high safe reliability. The said method and device will replace the national current fall behind electric milling cam type FBW method and device.

An apparatus for forming the stainless steel band used for the composite steel-aluminum conductor rail is composed of decoiler, guiding-leveling machine, shearing-butt welding machine, servo feeder, punch machine, rolling set and sizing-cutting off machine.

The invention discloses a girth welding technology for a vacuum container, which comprises the following steps: processing beveled edges, assembling and welding. In the step of processing the beveled edges, a 14mm thick 0Cr18Ni9 austenitic stainless steel material is selected as a cylinder base material, X-shaped beveled edges are adopted, an inside beveled edge is processed for 10mm with a single-side angle of 32.5 degrees, an outside beveled edge is processed for 4mm with a single-side angle of 35 degrees, and no truncated edge is left. In the step of assembling, reserved clearances of 2.0-2.5mm are assembled, argon tungsten-arc welding is adopted to position, a positioning welding length is 10-15mm, an interval is 200mm, and then a 'strut having a shape of Chinese character 'mi' which is used for adjusting the roundness of a cylinder is welded in the cylinder. In the step of welding, an argon arc welding double-gun butt-welding method is used for bottoming the interior of the cylinder, two layers are filled in an inner welding bead of the cylinder in the manner of manual arc welding, an external welding bead is covered in the manner of submerged-arc welding, and finally, the inner welding bead is covered in the manner of manual arc welding. The girth welding technology can be used for controlling the welding deformation and has the advantages that the method is simple and is easy to realize.

The invention discloses a method for producing an axle beam by using preheated flash butt welding, which comprises the following steps of: a workpiece clamping step, wherein an axle head and an axle pipe which are used as workpieces are respectively arranged in a shaft beam flash butt welding machine, are clamped by a hydraulic moving clamp and a fixed clamp, and align through an adjustment mechanism; a pre flash step, wherein a power supply is powered on, so that a moving clamp is pushed at a set constant speed, and further, flash can be generated between the workpieces and gradually shortens until the flash margin reaches a preset value; a preheating step, wherein the workpieces are preheated by preset preheated pulses; a flash step, wherein flash is carried out at set speed; an upsetting step, wherein upsetting is carried out immediately after flash; a heating and pressurizing step, wherein the workpieces are applied with preset pressure and are powered on to be heated; and workpiece disassembling step, wherein after welding, the workpieces are disassembled and taken out.

The invention discloses a method for visually tracking a plane abut-jointed weld beam by a linear laser aiming at the complex condition of a welding site. The method comprises the steps of: building a weld beam tracking system, establishing a coordinate system model of each part of the weld beam tracking system, calibrating a system structure by adopting a checkerboard target and a point laser; passively scanning a weld beam by a linear laser, stable and accurately positioning a laser weld beam center by adopting a weld seam center detection technology; and flexibly changing the detection distance between a weld point and an image through setting delay time by a user. According to the method, the influence on the quality of the image by arc light and spattering can be effectively avoided, small breakage of a laser bar is effectively resisted, and automatic tracking of the plane abut-jointed weld beam is stably and accurately realized on line. The method has an important significance on realizing the welding automation.

The invention relates to a process for welding a high-strength hull structure steel, in particular to a plain butt welding process for a high strength hull structural steel plate (CCSE69040mm). The butt welding process is characterized in that effective specifications for bevel for welding, weld preheating, welding temperature, welding sequence, welding variables and after-welding cold treatment are provided. The plain butt welding process has the advantages of enabling the process of welding a super-thin high strength steel plate to be implemented smoothly, improving the operating efficiency, saving the raw materials, reducing the production cost, reducing the shipbuilding period, and filling a domestic technical blank on the welding of a high strength thick hull structural steel (CCSE69040mm).

The invention discloses a long continuous steel box girder or combined box girder construction method, including the following steps: 1, segment division and plate unit division; 2, butt welding the fulcrum segmental box girders and standard segmental box girders at a prefabrication plant, namely, pre-splicing the segmental box girders of a full span box girder and the first box girder segment of the adjacent span box girder through long line method on a segmental box girder molding bed on which plane curves and pre-camber are arranged; marking the box girder segments, taking away the segmental box girders of the full span box girder, leaving the first box girder segment of the adjacent span box girder, and continuing to splice and weld the segmental box girders of the rest full span box girders; 3, generally assembling the full span box girders in the prefabrication plant. The invention adopts full span prefabrication and arrangement to construct a long continuous steel box girder or combined box girder, thus greatly reducing welding work load at the site. The invention ensures that the adjacent spans close smoothly after the steel girders are arranged and meets the requirements of light large span, precast assembly and quick construction.

The invention in particular relates to a welding process for super thick high strength steel plates for ships and provides a downward and butt welding process aiming at downward and butt welding of EH36Z 100mm-thick high strength steel plates for a ship structure. By putting forward effective specifications for welding grooves, weld preheating, welding temperature, welding sequence, welding variables and cold treatment after welding, the welding process of the high strength steel for super thick plates can be smoothly implemented; and by using the welding process, the labor efficiency is improved, the raw materials is saved, the production cost is reduced, the ship building period is shortened, large scale practical application of the steel to the engineering is successfully implemented for the first time and the gap in the technical specifications in welding of the EH36Z 100mm-thick high strength steel for thick plates for the ship structure at home is filled in.

The invention discloses a butt welding positioning device for a thin-walled cylinder with a seal head, and belongs to the technical field of process equipment. The device is mainly technically characterized by comprising a pressing plate, a pipe sleeve, a pull rod, a support body, a cone, a bulging block, a copper cushion block, a countersunk screw, a band spring, an adjusting nut, a gasket and a locking nut, wherein the pressing plate is adjusted by the adjusting nut to position a workpiece; the cone is pulled by the pull rod to jack and bulge the three-flap bulging block; the bulging block centers, bulges and clamps the workpiece to be welded; the taper of the inner wall of the bulging block is the same as that of the external surface of the cone; and a radial annular groove is formed on the surface of the copper cushion block. The assembly positioning problem of the thin-walled cylinder with the seal head and a thin-walled hollow cylinder during butt welding can be effectively solved, welding deformation is effectively reduced, and the device has the advantages that: the device has a simple structure, is convenient to assemble and disassemble and is operated and used reliably.

The invention in particular relates to a downward and butt welding process for high strength steel for a ship structure and provides a downward and butt welding process aiming at EH36 30mm-thick high strength steel plates for the ship structure. By putting forward effective specifications for welding grooves, weld preheating, welding temperature, welding sequence, welding variables and cold treatment after welding the welding process of the high strength steel for super thick plates can be smoothly implemented; and by using the welding process, the labor efficiency is improved, the raw materials are saved, the production cost is reduced, the ship building period is shortened and the gap in the technical specifications in downward and butt welding of the EH36 30mm-thick high strength steelfor the ship structure at home is filled in.

A light foot lead welding machine of a bulb in a bulb comprises a bottom frame, a tray which is arranged on the bottom frame and can move forward step by step in the horizontal direction and a central controller for controlling the light foot lead welding machine to move in sequence. A plurality of clamping devices are evenly arranged on the tray, a feeding station capable of conveying lamp holders or core columns to the clamping devices, a welding station capable of welding a lamp foot lead and a finished product discharging station capable of discharging finished products from the clamping devices are sequentially arranged besides the tray, and each welding machine of the welding station at least comprises a pair of butt welding electrodes which move relatively in the vertical direction. The clamping devices comprise first clamping heads capable of clamping the lamp holders and second clamping heads capable of clamping the core columns, the first clamping heads and the second clamping heads are arranged in right and left mode in the horizontal direction, and welding spaces are reserved between the first clamping heads and the second clamping heads. Due to the fact that the light foot lead welding machine of the bulb in the bulb has the characteristics and the advantages, the light foot lead welding machine of the bulb in the bulb can be applied to production devices of the bulb in the bulb and other similar products.

The invention discloses a manufacture method for double-curve H-shaped steel. The manufacture method comprises the following steps of: 1) reviewing the material quality of a supplied horizontal plate, flattening the horizontal plate, and pre-processing; 2) three-dimensional lofting by a computer, and spreading in a plane; 3) cutting and blanking on a numeric control cutting machine; 4) opening a groove on an H-shaped steel web, and carrying out the butt welding; 5) marking a bending line and an assembly line on the web and a flange plate; 6) manufacturing a bending jig frame according to three-dimensional coordinates; 7) bending the web and the flange plate via the method of flame rectification assisting cold bending formation; 8) manufacturing a assembly jig frame; 9) combining position welding and spot-welding on an upper flange plate and a lower flange plate respectively assembled on an assembly jig frame group; 10) welding the soldering seam between the web and the lower flange plate; 11) lifting the component from the jig frame, and turning over the component to weld the soldering seam between the web and the upper flange plate; and 12) returning the jig for a repeated inspection, and carrying out the three-dimensional coordinates detection through a total-station instrument. According to the manufacture method, used equipment is simple, and efficiencies on manufacture and production are improved.

The invention provides an automatic tube butt joint all-position TIG welding technology for coiled tubing. The technology comprises the steps that the tube ends at the two sides of the coiled tubing are straightened, the tube ends of the two sides are subjected to V-shaped edge preparation or U-shaped edge preparation, the inner wall and the outer wall of a joint between the tube ends are cleaned, then the tube ends are assembled in a butt joint mode, a butt joint of the coiled tubing is subjected to non-wire-filling backing weld, filling weld and cosmetic weld through the automatic all-position TIG welding technology, when the butt joint is welded, the arc starting position of a welding gun is located at 1:30 or 2:00, and a separated section welding technology method is adopted for welding. By means of the welding technology, aiming at the tube butt joint welding of the coiled tubing, the traditional manual TIG welding is transferred into full-automatic TIG welding, the working efficiency is improved, the labor intensity is lowered, and the welding joint of the coiled tubing of great comprehensive performances is obtained.

In the method of drawing fiber continuously from preforms for manufacturing an optical fiber, a first preform is displaced along a fiber-drawing axis and is drawn into an optical fiber through a fiber-drawing furnace disposed on the fiber-drawing axis, and a second preform is displaced along the fiber-drawing axis, which second preform is butt welded to the first preform so as to be drawn into an optical fiber following on from the first fiber. The two preforms are butt welded, i.e. they are welded together end-to-end, by displacing at least one power laser along the fiber-drawing axis, and by servo-controlling the displacement of said laser to the displacement of the two preforms so as to maintain a laser beam emitted by the power laser at the same height as the two ends to be welded together, thereby making it possible to reduce considerably the size of the zone affected by the welding, and to avoid polluting the side surfaces of the two preforms upstream and downstream from the weld.

The invention provides a bogie frame and a manufacturing method thereof. The manufacturing method includes the steps: respectively splicing and welding steel plates to form beams and side beams of a box structure; butting and welding the beams and the side beams together to form a base frame of the bogie frame, and welding butt joints of the beams and the side beams by a butt-jointed seam type; and welding additional devices on the base frame to obtain the bogie frame, and welding welds of the additional devices and the base frame by the butt-jointed seam type. The bogie frame and the manufacturing method thereof can overcome the shortcomings that profiling quality of the beams and the side beams manufactured by pressing with dies is unstable, and the surfaces of the steel plates are easily scratched. The welds of the beams and the side beams and the welds of the base frame and the additional devices are welded by the butt-jointed seam type, a large stress area can be avoided, and the structural strength and the fatigue resistance of the bogie frame are improved.

In order to make the depth of penetration in the weld bead portion uniform and obtain a bead shape having a flat bottom without spiking and meltdown during continuous hot rolling by bonding a plurality of hot-rolled steel materials using a laser beam, the following methods are employed: (A) a method of butt welding wherein center gas is blown against the welding portion symmetrically to the optical axis of the laser beam while side gas is being blown thereagainst from the side, the method comprising conducting welding while the center of laser-induced plasma is shifted in the welding direction from the center of the laser beam by a distance 0.2 to 0.5 times as much as a reference plasma diameter determined from the laser output and the beam diameter, and the type and flow rate of the center gas; or (B) a method comprising scanning the butt line with the laser beam during the laser welding at a speed of 2 to 10 m/min, and simultaneously oscillating the laser beam in the direction vertical to the butt line at a frequency of 40 to 80 Hz at an amplitude of 0.4 to 1.0 mm. Alternatively, (C) in order to prevent formation of blow holes in the weld bead, to make the depth of penetration in the weld bead portion uniform, and to obtain a bead shape having a flat bottom without spiking and excessive penetration, laser welding is conducted while a filler wire of an iron series base material, containing from 0.05 to 3% of one or at least two elements selected from aluminum, silicon, titanium and manganese, is being supplied to the welding portion. Moreover, (D) in order to stably supply a filler wire to the butt portion with high supply accuracy, the filler wire W is passed through a wire supply nozzle having a curved portion, and the filler wire is supplied toward the welding point along the welding line.

The invention relates to a method for half-breadth double-span total assembling and building in shipbuilding, which comprises the following steps: firstly, dividing the half-breadth building at the bottom of a cargo area of a ship into four sections including two double-layer bottom sections and two bottom edge water camber sections; secondly, using one of the double-layer bottom sections as a reference, performing normal total assembling on the two double-layer bottom sections; and thirdly, aligning and welding the two bottom edge water camber sections with the corresponding double-layer bottom sections first, and then performing butt welding on the two adjacent bottom edge water camber sections so as to form a half-breadth type total section. The building method is advantageous for the structural completeness of a shipway, and can speed up the structural submission progress. The pitch point control at a bilge round-turning part can be performed at the total assembling in advance, thus the number of butt joints at the round-turning part of an upper shipway is reduced, the shipway and a total assembling platform are used reasonably, and the utilization rate of the total assembling platform is improved.

The invention discloses a pulsed switch-on preheating flash butt welding process for steel rims of heavy trucks, which belongs to the technical field of welding, and comprises the steps of blanking, reeling, flattening, welding condition setting, fitting, pulsed flash preheating, continuous flash, charged upsetting, pressure maintaining, clamp loosening, deburring, and the like. The process is characterized by comprising the controlled process parameters as follows: the overhanging length is 20-50mm; the flash allowance is 5-12mm; the upset allowance is 5-10mm; the upset force is (2-3)*105 N; the clamp force is (3-6)*105 N; the pulsed switch-on preheating process is (4-10) times*(0.5-1.2) s, (0.1- 0.2) s per pulse; the preheating and welding voltage is 10.8-14.6 V; the flash time is14-30s; and the upset charged time: 0.3-2s. The process disclosed by the invention has the advantages that the degree of automation is high; the process is suitable for welding steel rims (thickness: 3-8mm, width: 300-400mm) of heavy trucks, and after the welded steel rims are sequentially subjected to trimming, flaring, roll shaping and expanding, the welded joints have no crack defect.

The invention relates to a nuclear island primary device connection tube safe end dissimilar metal welding technology which comprises the following steps: selection of form of a welding groove: selecting a single groove form as the groove form of a primary device connection tube; overlay welding of stainless steel: overlay-welding a stainless steel anti-corrosion layer on the inner wall of the primary device connection tube; overlay welding of isolating layer: overlay-welding an isolating layer on the end face of the primary device connection tube by carrying out TIG overlay welding with hot wire to obtain a transition layer and carrying out submerged arc overlay welding to obtain a surface layer; butt welding: butting the safe end with the surface layer at the end face of the primary device connection tube in a submerged arc welding mode; and postweld heat treatment. The invention reduces the welding cost and the labor intensity of welders, and ensures the successful welding of the safe end structure, thereby laying foundation for reliable welding of the safe end and the primary device connection tube.

The invention discloses an FSW (Friction-stir Welding) method assisted by a heat source. The method comprises the following steps of: A, splicing and fixing to-be-welded materials, preheating to-be-welded regions by an auxiliary heat source until the welded materials are in a plasticized or alloyed state; and B, enabling the auxiliary heat source and a friction-stir head to be positioned on same pair of butt welding wires, and after the welded materials are heated to be in the plasticized state, enabling the friction-stir head to advance along the heating path of the auxiliary heat source so as to perform friction welding. The invention provides a composite welding method which is reasonable in cost, long in service life of stir head, capable of realizing high high-melting-point metal and dissimilar metal welding speed, and high in welding quality. According to the welding method, the service life problem of the stir head of high-melting-point metal FSW and the problem of dissimilar metal FSW welded seam alloying are successfully solved, the welding cost of the high-melting-point metal and the welding cost of the dissimilar metal are greatly lowered and the welding quality is improved.

Nickel-base radiant tube includes straight and curved elbow tube sections. The straight tube section has constant inner and outer radii. The elbow tube section has a constant inner radius and variable outer radius. The inner diameter of the elbow tube section is equal the inner radius of the straight tube section. Mating end portion of the elbow tube section has an outer radius equal to the outer radius of the straight tube section. Method for making the radiant tube comprises the steps of positioning a mating end portion of the straight tube section adjacent to and aligned with the mating end portion of the elbow tube section so that end faces of the straight and elbow tube sections face each other to define a circumferentially extending weld groove, and butt welding the mating end portions of the straight and elbow tube sections together at the weld groove.

The invention provides a method for welding a dissimilar material welded joint of a composite plate, belongs to the field of dissimilar material welding of composite plates of pressure vessels, and aims to solve the problems that the corrosion resistance at the welded joint part is reduced, welding cracks easily occur in the joint face of a composite plate and the like. According to the technical scheme, the method mainly comprises the following steps: processing a groove, removing the clad layer and oil rust on the periphery of the groove until the periphery of the groove has metal luster; surfacing from the bottom of the groove, surfacing the insulating layer on the side of the composite plate, and performing stress relieving annealing thermal treatment on the composite plate; welding by adopting small-sized welding rods in a multi-layer and multi-pass welding manner; and performing butt welding on the composite plate and an austenitic stainless steel material, performing manual tungsten argon arc welding for the backing weld, filling the weld pass by adopting shielded metal arc welding, small-size, small thermal input, short arc quick welding and multi-layer multi-pass welding. The method can be used for welding a dissimilar material welded joint between a Cr-Mo low-alloy steel/carbon steel-austenitic stainless steel composite plate and austenitic stainless steel, has excellent welded joint quality, and can be used for overcoming the defect of the prior art.