31results about "Welding electrode features" patented technology

The invention provides a positive and negative pressure pulse electric arc welding and additive manufacturing method which comprises the following steps: inducing electric arc plasma to generate a negative pressure electric arc with an anti-gravity adsorption effect through a current-magnetic field-hollow tungsten electrode-gas collaborative design, and forming a time sequence coupling process with a positive pressure electric arc. The core of the method is that a magnetic control positive pressure and negative pressure electric arc welding external field is cooperated with a molten pool reconstruction forming mechanism, that is, the dynamic and thermodynamic states of a molten pool are accurately balanced by dynamically switching the electric arc pressure direction and regulating and controlling the action proportion and alternating frequency of negative pressure and positive pressure electric arcs. A self-adaptive magnetic field threshold model based on current intensity and a gas mode is combined with variable polarity power supply parameters and gas flow rate cooperative control, and the problems of thin plate welding fusion penetration and thin-wall additive molten pool instability are effectively solved. According to the method, a welding wire, powder or laser composite manufacturing mode can be integrated, the forming precision and performance of a complex structure are remarkably improved, and an innovative technical support is provided for high-quality and high-efficiency welding and additive manufacturing.

The invention provides an electrode convenient to replace and a welding device, and belongs to the technical field of welding devices. The electrode convenient to replace comprises an electrode tip and an electrode holder, a clamping piece is arranged on the electrode holder, and a first clamping groove is formed in the clamping piece; a clamping block is arranged on the electrode tip, and the clamping block is clamped with the first clamping groove. The electrode convenient to replace is novel in design, the electrode tip and the electrode holder can be quickly connected, so that the replacement time of the electrode tip is saved, and the welding efficiency is improved.

The composite material electric arc additive manufacturing device comprises a composite material manufacturing six-axis mechanical arm, a composite material manufacturing six-axis mechanical arm control cabinet, a wire feeder, a wire feeding pipe mounting frame, an adjustable rocker arm transverse reciprocating wire distribution mechanism, a welding gun, a deposition piece, a wire feeding pipe and a composite material electric arc additive manufacturing power source. The transverse reciprocating wire distributing mechanism with the adjustable rocker arm comprises a wire distributing pitching angle adjusting structure, a wire distributing swing adjusting structure, a wire distributing tensioning structure, a wire distributing clamping structure and reinforced fiber wires. The swing amplitude and the swing frequency of the fiber distribution swing adjusting structure are adjusted, so that on-demand or uniform arrangement of the reinforced fibers is achieved, and the material performance of the deposition piece is improved.

This invention provides a weldable, lightweight, long-life arc-initiating electrode and welding method, including an anode head, a cathode head, an anode column, and a cathode column. The anode head and cathode head are made of single or composite metal conductor materials resistant to arc erosion; the anode column and cathode column are also made of single or composite metal conductor materials. The current path is as follows: the arc igniter is connected to both ends of the track in the muzzle region of a high-speed electromagnetic propulsion device, powered by an external power source. Current flows through the track and armature path of the high-speed electromagnetic propulsion device. The armature, under electromagnetic force, accelerates and slides from the muzzle towards the muzzle. When the armature exits the muzzle, it disengages from the track. Simultaneously, the metal or plasma medium in the gap between the bypass electrodes of the arc igniter induces gap breakdown discharge, achieving arc initiation. This invention meets requirements for conductivity and high tensile strength.

Strip flash butt welding machine (1) for welding end faces (7, 15) of strip ends (3, 11) of at least one strip with a) first tensioning elements (5) for tensioning a first band end (3) and second tensioning elements (12) for tensioning a second band end (11), b) a first alignment element (4) for aligning the first strip end (3) and a second alignment element (10) for aligning the second strip end (11), c) wherein the second clamping elements (12) are movable relative to the first clamping elements (5) in the direction of a longitudinal axis (9) via a drive, d) the first clamping elements (5) and the second clamping elements (12) each comprise a strip flash butt welding machine electrode (6, 13) which is formed at least in two parts and comprises a base body (57) and a contact body (58), characterized in that e) the first alignment element (4) and the second alignment element (10) are coupled to one another via a coupling device which specifies a relative alignment of the first and second alignment elements (4, 10), f) the second clamping elements (12) are movable translationally in the direction of the longitudinal axis (9) relative to the two alignment elements (4, 10) by means of the drive and g) the coupling device is a mechanical coupling device (54) which firmly connects the first alignment element (4) and the second alignment element (10) during a conversion.

The invention discloses a trolley walking device suitable for automatic submerged-arc welding of a special-shaped steel box girder. The trolley walking device solves the technical problem that in the prior art, when a non-linear welding seam of the special-shaped steel box girder is welded, time and labor are wasted due to manual welding. Comprising two clamping mechanisms installed at the front end and the rear end of a welding trolley respectively, and each clamping mechanism comprises angle steel installed at the front end or the rear end of the welding trolley and positioning screws detachably installed at the two ends of the angle steel and in sliding contact with the two sides of a top plate of the special-shaped steel box girder; corner posts are arranged at the bottoms of the positioning screws. The automatic welding device is simple in structure, scientific and reasonable in design, convenient to use, capable of effectively achieving automatic welding of the special-shaped steel box girder on the premise that safe welding is guaranteed, easy to assemble and disassemble and capable of guaranteeing efficiency and effectively reducing labor cost.

The invention discloses a welding electrode for high-current argon tungsten-arc welding and a preparation method of the welding electrode, and belongs to the technical field of welding materials. The welding electrode comprises a columnar base body and a discharging end face. The columnar base body is formed by welding a tungsten rod and a copper rod through electric arc welding; the discharge end face is located at the end of the tungsten rod, and 2-4 regularly-distributed convex points are arranged on the surface of the discharge end face and serve as arc discharge points. The preparation method comprises the steps of material pretreatment, positioning and clamping, nickel powder coating, welding parameter setting, copper-tungsten welding, welding joint cleaning, salient point structure manufacturing, copper electrode heat dissipation channel manufacturing and quality inspection. A copper-tungsten composite structure is adopted, a plurality of discharge protruding points are arranged at the end of the tungsten electrode, the single-point burn-out rate is remarkably reduced by dispersing electric arc heat loads, rapid metallurgical bonding of a copper bar and a tungsten bar is achieved through the electric arc welding technology, the burn-out resistance service life is greatly prolonged, the electric arc stability is greatly improved, and the welding rod is suitable for large-current welding, aluminum alloy beveling welding and the like.

Component for an electrically operated arc torch, in particular a plasma torch or plasma cutting torch, characterized in that the component or at least part or a region of the component consists of a material comprising aluminum oxide and at least one of the chemical elements silver and copper.

A boiler tube stud welding gun includes a welding gun mounting plate, a welding gun unit mounted on the welding gun mounting plate, and two adaptive side support legs located on either side of the welding gun unit and indirectly connected to the welding gun mounting plate. The adaptive side support legs include a mounting bar, a support block located below the mounting bar, a connecting column connected to the top of the support block and passing through the mounting bar, a sliding bearing located within the mounting bar and slidably connected to the connecting column, a spherical bearing located outside the sliding bearing, a snap-on stud connected to the top of the connecting column, and a spring sleeved outside the connecting column with its ends abutting the mounting bar and the support block, respectively. This ensures that the welding gun is in a normal position relative to the arc surface, ensures that the resistance on both sides of the welding gun is consistent, avoids structural arc deflection, and improves welding quality.

The utility model discloses a double-wire outlet nozzle structure, which relates to the technical field of wire outlet nozzle structures, and comprises a shell, a wire feeding groove is formed in the shell, a blanking cap is mounted on one side of the shell, a limiting groove is formed in the shell, a frame is mounted in the limiting groove, a sponge wiper is mounted on the inner side of the frame, and the sponge wiper is mounted on the outer side of the shell. The welding wire feeding device comprises a shell, a plug cover is arranged in the shell, two mounting grooves are formed in one side of the plug cover, two mounting plates are fixedly mounted on one side of the shell, and the mounting plates are matched with the mounting grooves. The welding wire feeding device has the beneficial effects that a sponge wiper is mounted in the shell, so that the surface of a welding wire can be wiped through the sponge wiper when the welding wire enters a wire feeding groove; according to the welding wire dust removal device, dust on the surface of a welding wire can be effectively removed, the follow-up welding effect of the welding wire dust removal device is improved, through cooperation of a blanking cap, a limiting groove and a frame, the frame can be conveniently detached from the shell, dust wiped down from the sponge wiper can be conveniently cleaned, and detaching and cleaning are convenient and fast.

The invention provides a welding type light-weight long-service-life arc striking electrode and a welding method. The welding type light-weight long-service-life arc striking electrode comprises an anode head, a cathode head, an anode column and a cathode column. The anode head and the cathode head are made of single or composite metal conductor materials resistant to arc ablation; and the anode column and the cathode column are made of single or composite metal conductor materials. According to a current path, the arc starter is connected to the two ends of a rail in a bore opening area of the high-speed electromagnetic propulsion device and powered by an external power source, current conducts the rail and an armature path of the high-speed electromagnetic propulsion device, and an armature slides in a bore in an accelerated mode from a bore tail to a bore opening under the action of electromagnetic force; meanwhile, the metal or plasma medium in the bypass electrode gap of the arc striking device induces the gap to disrupt and discharge, and the arc striking effect is achieved. The cable can meet the requirements of conductivity, high tensile strength and the like.

The utility model relates to the technical field of screw processing, and discloses an electrode group for keeping a welding screw in the middle, which comprises a middle pipe, a connecting upper pipe fixed with the middle pipe and a connecting lower pipe fixed with the middle pipe, and the connecting lower pipe is trumpet-shaped. The middle pipe is in a hollow shape, and the length of the middle pipe is 23 mm. And the degree of finish of the upper connecting pipe is 1.6 microns. The electrode group with the welding screw kept in the center can ensure that the lower electrode hole and the part hole are centrally processed, so that the situation that the screw is not located in the center of the part hole and a battery shell is difficult to install is avoided, and the processing efficiency of equipment can be effectively improved.

The invention provides a start-stop production process for argon arc welding of an ultra-long stainless steel pipe, and belongs to the technical field of welding methods of the ultra-long stainless steel pipe. According to the method, the polishing angle of the tungsten needle is changed from original 30 degrees to 18 degrees, the problem of base metal adhesion during arc striking is solved, the qualification rate during starting and stopping is improved, meanwhile, the loss of the tungsten electrode is reduced, and the starting and stopping frequency is prolonged from original 3 hours once to 6 hours once. According to the method, by setting specific welding parameters such as the starting climbing current and the climbing speed, adopting the slow rising current and setting the reversing distance, soft starting is achieved, the current is slowly increased from low to high during starting of the vehicle, metal of an arc starting point can be fully and stably melted, and therefore a smooth and defect-free welding starting point is obtained and perfectly fused with a follow-up welding bead.

The invention discloses an electrolytic arc combined machining tool with multi-gear continuously adjustable discharge energy. The electrolytic arc combined machining tool comprises a liquid inlet guide sleeve, a spring, a guide rod, an insulation sleeve, a graphite pipe, an electrode handle and an electrode tip. The lower end of the guide rod extends into the graphite pipe, and electrolyte flowing in a gap between the guide rod and the graphite pipe forms an annular resistor. The resistance value of the electrolyte resistor is changed by adjusting the length of the guide rod in the graphite pipe, so that the arc discharge peak current is controlled, and different machining requirements such as high-surface-quality or high-efficiency material removal are met. The electrolyte serves as a current-limiting resistor, multi-gear continuous adjustment of discharge peak current is achieved, an existing electrolyte circulating system is used for heat dissipation, a special cooling device does not need to be additionally arranged, switching of different machining requirements can be rapidly responded, and the equipment cost is effectively reduced while the technology applicability is improved.

The invention provides a rotating wheel type automatic tungsten needle replacing device which comprises an installation base, a rotating wheel type tungsten needle storage structure, a rotating wheel positioning structure, a rotating wheel stirring structure and a tungsten needle pushing structure are installed on the installation base, and the rotating wheel type tungsten needle storage structure comprises a storage box. The storage box is rotationally mounted on the mounting base, a plurality of storage holes for storing tungsten needles are formed in the storage box, and a plurality of positioning holes are annularly formed in the outer wall of the storage box; the rotating wheel positioning structure comprises a positioning telescopic driving part, and a positioning insertion rod is arranged at the telescopic end; the rotating wheel shifting structure is used for driving the storage box to rotate; the tungsten needle pushing structure comprises a pushing telescopic driving part and a guide push rod, the guide push rod is installed at the telescopic end of the pushing telescopic driving part, and the guide push rod penetrates through the installation base and the storage hole under the action of the pushing telescopic driving part. The device can achieve the functions of automatic conveying, replacing, positioning and the like of the tungsten electrode, manual operation is not needed, the overall structure is simple, operation is easy and convenient, and the occupied space is small.

A multielectrode system, comprising a plurality of electrodes arranged around a workpiece region, is provided, wherein each electrode is configured to generate a heated arc with at least one adjacent electrode, a circuit is configured to power and / or ground each electrode, and a microcontroller is configured to control each of the plurality of electrodes via the circuit. The microcontroller is configured to cause the plurality of electrodes to operate in a uniform heated field mode that provides a substantially uniform heated field around in the workpiece region and to cause at least some of the electrodes to operate in an individual arc control mode that provides an arc between two adjacent electrodes, but not between all electrodes in the plurality of electrodes. Methods of processing an optical fiber via a multielectrode system are further provided.

An arc additive manufacturing method for a nuclear power water reactor main pipe 316L-In718 functional gradient material relates to the field of additive manufacturing, and aims at solving the problems of poor interlayer bonding capacity of dissimilar metals, uneven component distribution, poor size precision and stress corrosion cracking and the like in the process of preparing materials in the prior art.The nuclear power water reactor main pipe 316L-In718 functional gradient material is prepared by using the coaxial wire feeding arc additive manufacturing method, wherein the welding wire of the coaxial wire feeding is 316L-In718 stranded welding wire.The method can realize the relatively continuous component gradient transition of the 316L-In718 functional gradient material of the large nuclear power water reactor main pipe complex structure, and the effect of improving the deposition efficiency, forming size precision, corrosion resistance and interlayer bonding capacity is achieved.

The application provides a positive and negative pressure pulse arc welding and additive manufacturing method, through current-magnetic field-hollow tungsten electrode-gas collaborative design, negative pressure arc of anti-gravity adsorption effect induced by arc plasma is generated, and time sequence coupling process is formed with positive pressure arc. The core lies in the magnetic control positive and negative pressure arc welding external field collaborative molten pool reconfiguration forming mechanism, that is, through dynamically switching the direction of arc pressure, through regulating the action ratio and alternating frequency of negative pressure and positive pressure arc, the dynamic and thermodynamic state of the molten pool is accurately balanced. Based on the adaptive magnetic field threshold model of current intensity and gas mode, combined with the collaborative control of variable polarity power supply parameters and gas flow rate, the problems of thin plate welding melt-through and thin wall additive melt pool instability are effectively solved. The method can integrate the welding wire, powder or laser composite manufacturing mode, significantly improve the forming precision and performance of complex structure, and provide innovative technical support for high-quality and efficient welding and additive manufacturing.

A special-shaped modularized electrode welding device comprises an electrode cover (1) and an electrode holding rod (2), the electrode holding rod (2) is in an L shape, a cooling water channel a (201) is axially formed in the long edge of the electrode holding rod (2), a cooling water channel b (202) is axially formed in the short edge of the electrode holding rod (2), the cooling water channel b (202) is communicated with the cooling water channel a (201), and the cooling water channel a (201) is communicated with the electrode holding rod (2). One end of the cooling water channel b (202) is communicated with the outside, and the other end is a blind hole; an electrode mounting hole (203) is formed in the outer end of the short edge of the electrode holding rod (2), the electrode mounting hole (203) is close to the blind hole end of the cooling water channel b (202), and the electrode mounting hole (203) is matched with the electrode cover (1) and used for mounting the electrode cover (1).

The present invention provides a right-angle turn welding method, relating to the technical field of manufacturing box-shaped structures. The right-angle turn welding method includes: path planning, planning a pre-bend point on the surface to be welded of a first welding plate, planning a bend point on a second welding plate, and planning a top bend point between the first welding plate and the second welding plate; root layer welding, changing the welding gun's travel angle while maintaining its working angle unchanged during the process from the pre-bend point through the top bend point to the bend point, to complete the root layer welding between the first welding plate and the second welding plate; and filler layer welding, changing the welding gun's travel angle and working angle during the process from the pre-bend point through the top bend point to the bend point, to cover the filler layer on the root layer. The right-angle turn welding method increases full fusion, improving welding quality and appearance quality.

This invention provides a method for coaxial wire feeding welding and additive manufacturing using a hollow tungsten electrode with positive and negative voltage pulsed arc. The method includes: fixing a workpiece or additive manufacturing substrate on a platform; setting hollow tungsten electrode parameters; configuring a variable polarity or pulsed arc power supply; setting key process parameters; and starting the coaxial wire feeding system, the hollow tungsten electrode arc power supply, and the external magnetic field excitation equipment. Through these steps, a pulsed timing synergistic process is constructed, synergistically controlling the magnetic field, the gas flow direction and velocity within the hollow tungsten electrode, and the arc current to form an external field with alternating positive and negative voltage arcs. The suction force of the negative voltage arc pulse phase directionally guides the molten wire droplets to a stable, impact-free transition into the molten pool, while the positive voltage arc pulse phase releases the molten pool pressure and spreads the liquid metal. This synergistic control of the droplet-molten pool system solves the problem of molten pool instability in thin-plate welding and thin-walled additive manufacturing, ensuring high-quality formability of welded or additively manufactured components.

The application discloses a bus copper bar processing and welding equipment and relates to the technical field of bus copper bar welding.The bus copper bar processing and welding equipment comprises a copper bar pushing and fixing mechanism, a welding mechanism and a mounting frame.The mounting frame comprises a base, a bottom plate and an L-shaped welding frame.The copper bar pushing and fixing mechanism comprises two angle-adjusting pushing and fixing units, two arc-shaped notches are symmetrically arranged on the bottom plate along the diagonal lines of the bottom plate, and a rotary driving assembly is arranged at the bottom of the angle-adjusting pushing and fixing unit.The bottom plate is provided with a lower electrode structure, the lower surface of the crossbeam of the L-shaped welding frame is provided with a horizontal moving mechanism, the welding mechanism comprises a horizontal moving block, a resistance welding unit and an electric arc welding unit, and a CCD high-definition camera is arranged between the resistance welding unit and the electric arc welding unit.The two angle-adjusting pushing and fixing units can be used for angle adjustment and butt joint of two copper bars, resistance welding and electric arc welding can be switched, the existing welding equipment can only realize one welding mode, and the problems of inaccurate multi-angle butt joint welding and the like can be solved.

The invention discloses an air-cooled portable inverter welding machine, and particularly relates to the technical field of electric welding machines, a clamping jaw I and a clamping jaw II are used for clamping and fixing the end part of an electrode and the periphery of a nozzle respectively, so that the electrode and the nozzle are stably positioned in the axial direction and the radial direction, and the clamped nozzle is driven to perform controlled rotation around the center of a hole II; the first clamping piece and the second clamping piece are cooperatively driven to be away from each other in the opposite directions, on the premise that the end of the electrode is kept not rotating through the first clamping jaw, the nozzle is driven by the second clamping jaw to generate thread unscrewing motion relative to the electrode till threaded connection between the electrode and the nozzle is completely separated, and automatic detaching and separating of the electrode and the nozzle are achieved. An operator does not need to use a wrench for hard screwing in a high-temperature and welding slag attachment environment, the labor intensity and the safety risks such as scalding and hand slipping are remarkably reduced, the corresponding electrode and the nozzle are driven to vertically face downwards and correspond to the cleaning unit and the scrap scraping unit, secondary manual adjustment is not needed, and the single-time maintenance period is shortened.

The invention relates to an automobile door hinge reinforcing plate welding tool and welding system, the welding system comprises a multi-pulse welding machine and further comprises a moving assembly matched with a base station to achieve two-degree-of-freedom movement of the base station, and the base station is further provided with a die repairing assembly. A traditional copper plate is replaced with the tungsten plate, the tungsten plate is high in melting point, meanwhile, stable electric arcs can be provided, heat is concentrated in the welding process, deformation is small, and the conditions of insufficient welding and welding deformation can be effectively improved. A left automobile door hinge and a right automobile door hinge can be matched through a positioning pin and a limiting bolt in the fixing assembly and an extending part in the supporting assembly, multiple sets of equipment do not need to be used for machining in a matched mode, the machining takt is reduced, the machining efficiency is improved, fool proofing can be conducted in the using process, and machining errors are prevented.

The invention provides a hollow tungsten electrode positive and negative voltage pulse arc coaxial wire feeding fusion welding and additive manufacturing method. Comprising the steps that a workpiece or an additive manufacturing substrate is fixed to a platform; setting parameters of the hollow tungsten electrode; configuring a variable polarity or pulse arc power supply; setting key process parameters; and a coaxial wire feeding system, a hollow tungsten electrode arc power supply and external magnetic field excitation equipment are started. Through the steps, a pulse time sequence collaborative process is constructed, the magnetic field, the gas flow direction and flow velocity in the hollow tungsten electrode and the arc current are synergistically regulated and controlled, and an external field with positive and negative pressure arc alternating action is formed. The adsorption force of the negative-pressure arc pulse stage is utilized to directionally pull wire molten drops to stably transfer to a molten pool without impact force, the positive-pressure arc pulse stage is coupled to release the pressure of the molten pool and spread liquid metal, a molten drop-molten pool system is cooperatively regulated and controlled, and the problem that the molten pool is unstable in thin-plate structure welding and thin-wall structure additive manufacturing is solved. And high-quality formability of welded or additive manufactured components is ensured.

The invention discloses an inert gas automatic restraint type high-temperature alloy welding device, and relates to the technical field of high-temperature alloy welding, the inert gas automatic restraint type high-temperature alloy welding device comprises a welding nozzle component and a gas restraint component, the lower end of the welding nozzle component is sleeved with an inert gas output end component, and the bottom end of the inert gas output end component is sleeved with the gas restraint component. According to the inert gas automatic restraint type high-temperature alloy welding device, through ingenious combination of a plurality of components, automatic restraint and accurate output of inert gas in the high-temperature alloy welding process are achieved; the inert gas output end component is responsible for evenly and stably conveying inert gas to a welding area, and oxidation and nitridation of high-temperature alloy in the welding process are effectively prevented. The gas constraint component further improves the welding precision and efficiency by accurately controlling the flowing path and range of the inert gas. And the first combined bolt and the second fixed bolt are used for firmly connecting all the parts together, so that the stability and the reliability of the whole device are ensured.

The invention discloses a system for feeding back STT root welding penetration degree in real time. The system for feeding back the STT root welding penetration degree in real time is composed of a welding power source, a movement mechanism, a welding gun, a current sensor, a voltage sensor, a data acquisition card and an industrial personal computer. The welding gun is located at the clamping end of the movement mechanism, and the current sensor is installed on a welding loop to measure welding current according to the Hall effect principle and communicates with the industrial personal computer through the data acquisition card. The voltage sensors are installed at the two ends of a welding arc to measure loop voltage and communicate with the industrial personal computer through the data acquisition card, and welding electrical parameters of the welding power source are controlled by output signals of the industrial personal computer. The industrial personal computer collects current and voltage of a welding loop and controls electrical parameters of a welding power source through the predictive control software system and the data collection card. According to the system for feeding back the penetration degree of STT root welding in real time, the penetration degree is controlled by adjusting welding parameters in real time.

Disclosed are an apparatus for automatically replacing a tungsten electrode for tungsten inert gas welding of a robot welding system and a corresponding method, wherein a gas hood mounting / removing clamp (20) removes a gas hood from a welding gun (10) with a burnt-off tungsten electrode; a first tungsten electrode seat (41) is moved, along with a first carriage, to a position corresponding to a tungsten electrode mounting / removing clamp (60) or the welding gun (10); the tungsten electrode mounting / removing clamp (60) removes the burnt-off tungsten electrode on the welding gun (10) and rests it on the first tungsten electrode seat (41); a second tungsten electrode seat (42) is moved, along with a second carriage, to the position corresponding to the tungsten electrode mounting / removing clamp (60) or the welding gun (10); the tungsten electrode mounting / removing clamp (60) snaps a new tungsten electrode from the second tungsten electrode seat (42) and mounts it to the welding gun (10); the gas hood mounting / removing clamp (20) mounts the gas hood to the welding gun with the new tungsten electrode. The present disclosure enables automatic replacement of the tungsten electrode, which guarantees weld seam quality of robot welding, improves the automation level of the system, and enhances welding efficiency.

The invention discloses an inert gas automatic restraint type high-temperature alloy welding device, and relates to the technical field of high-temperature alloy welding, the inert gas automatic restraint type high-temperature alloy welding device comprises a welding nozzle component and a gas restraint component, the lower end of the welding nozzle component is sleeved with an inert gas output end component, and the bottom end of the inert gas output end component is sleeved with the gas restraint component. According to the inert gas automatic restraint type high-temperature alloy welding device, through ingenious combination of a plurality of components, automatic restraint and accurate output of inert gas in the high-temperature alloy welding process are achieved; the inert gas output end component is responsible for evenly and stably conveying inert gas to a welding area, and oxidation and nitridation of high-temperature alloy in the welding process are effectively prevented. The gas constraint component further improves the welding precision and efficiency by accurately controlling the flowing path and range of the inert gas. And the first combined bolt and the second fixed bolt are used for firmly connecting all the parts together, so that the stability and the reliability of the whole device are ensured.

The application discloses a high-strength steel welding method, which comprises the following steps: splicing a first connecting steel piece and a second connecting steel piece to form a groove; performing backing welding on the first connecting steel piece and the second connecting steel piece, and the welding wire is a plurality of twisted welding wires; and performing filling welding and / or surface covering welding on the first connecting steel piece and the second connecting steel piece by adopting a double-wire three-arc welding mode, and the welding wire is a plurality of twisted welding wires. In the high-strength steel welding method, the root fusion property is effectively improved in the backing welding, the fusion property of the root weld toe position is improved, the root quality of the welded joint is ensured, the filling welding and / or surface covering welding can avoid the influence on the weld metal of the backing welding under the condition of ensuring a high welding speed and a high deposition efficiency, the overheating phenomenon at the connecting position is avoided, low deformation welding is ensured, and the risk of quenching cracking is avoided, and the rotating arc of the plurality of twisted welding wires can significantly reduce or even eliminate large particle spatter.