909 results about "Gas protection" patented technology

The invention discloses a welding device and method for a rocket engine jet pipe, and belongs to the technical field of aerospace engine welding. The welding device for the rocket engine jet pipe comprises a first tool used for clamping a to-be-welded scalloped segment of the engine jet pipe, a second tool used for clamping a to-be-welded barrel and a gas protection supporting cover used for conducting inert gas protection on the front face of a welding seam of the engine jet pipe. The first tool comprises a first inner supporting piece, the first inner supporting piece is sleeved with a pressing plate, and the pressing plate is provided with a first pressing structure for pressing the edge of the scalloped segment; the second tool comprises a second inner supporting piece and a third inner supporting piece which are used for supporting the barrels, and a pressing mechanism for pressing the splicing positions of the adjacent barrels is arranged outside the second inner supporting piece or the third inner supporting piece. By the adoption of the welding device and method for the rocket engine jet pipe, the problems that an existing engine jet pipe is prone to being oxidized when welded in the atmosphere, defects are generated, and the welding cost is high can be solved.

The invention belongs to the technical field of laser welding, and discloses a multi-parameter cooperative control laser welding method and system.The method comprises the steps that a laser energy control model is established based on material strength-thickness-gap ternary coupling, and the output power of an optical fiber laser is controlled; coaxial three-layer gradient gas is adopted for protection of a welding area, preheating before welding and double-temperature-zone gradient annealing after welding are adopted, the output power of an optical fiber laser and the three-layer gradient gas protection flow are regulated and controlled in real time through combination of multiple sensors and a control algorithm, the temperature of a heat affected zone is monitored in real time, and a cooling nozzle is controlled for cooling. And continuous parameter optimization is achieved through machine learning, and multi-parameter control laser welding is achieved.

A copper-aluminum composite plate material prepared by aluminum liquid continuous casting and a process thereof. The method includes: S1, heating an aluminum ingot to 700-800° C. and smelting for 1-3 h; S2, degassing smelted aluminum liquid, and keeping the temperature and standing; S3, texturing a copper strip, and then cleaning; S4, heating the pretreated copper strip to 200-650° C.; S5, under the protection of inert gas, continuously casting the treated aluminum liquid on the treated copper strip, performing quenching crystallization on a copper-aluminum composite material, and performing oxygen-free continuous casting; and S6, continuous rolling: rolling the continuously cast copper-aluminum composite material to obtain the copper-aluminum composite plate material prepared by aluminum liquid continuous casting.

The invention discloses a gas shielded automatic welding process and system for a consumable electrode of a nuclear power mechanical penetration piece. The process comprises the following steps: inputting parameters of the mechanical penetration piece into an automatic welding system; selecting a welding groove type based on the parameters of the mechanical penetration piece, and determining an initial welding process parameter range; identifying a welding seam and actual welding groove information; based on actual welding groove information, an initial welding process parameter range is automatically matched and adjusted through an automatic welding system, and actual welding process parameters are determined; according to the welding process, the welding operation is carried out by automatically matching the parameters required by welding, the whole process is automatically operated, the operation is simple, and the conditions that the welding efficiency of the mechanical penetration piece is low and the welding quality is unstable can be effectively avoided.

The invention discloses a local area inert gas protection auxiliary vacuum environment laser welding device and method, belongs to the technical field of laser welding, and aims to solve the problem that the laser welding quality of an existing easily-oxidized material is insufficient. A local area inert gas protection auxiliary vacuum environment laser welding device comprises a monitoring and feedback control system, a gas precise control system and a vacuum cavity, a gas nozzle, a workbench and a laser welding head are all arranged in the vacuum cavity, the laser welding head is located above the workbench, the gas nozzle is arranged on one side of the laser welding head, and the gas nozzle is arranged on the other side of the laser welding head. The vacuum pumping system is connected with the vacuum cavity, the laser welding head is connected with the laser welding machine, the gas precise control system controls the flow and the mixing proportion of inert gas jetted by the gas nozzle, and the monitoring and feedback control system monitors the temperature, the vacuum degree, the oxygen content and the plasma state of a welding area. And data are fed back to carry out closed-loop regulation control on various welding parameters. And the welding quality is greatly improved.

In order to simplify an existing gas protection device in welding and keep effective protection of the gas protection device on a welding seam, the utility model provides a welding back protection tool device which comprises a base frame with a gas containing cavity, a gas inlet is formed in one end of the base frame, an exhaust port is formed in the other end of the base frame, and a plurality of telescopic cylinder assemblies are arranged around the exhaust port. And a sealing blade is arranged on the outer side of the telescopic cylinder assembly. In the specific using process, a stable and pure gas environment can be provided for a welding area, and therefore the welding reliability and quality are remarkably improved. In addition, the device can be installed on a movable device in the prior art to synchronously follow a welding gun so as to stably and continuously protect a welding spot.

The invention discloses a welding method of a high-strength steel vertical rod for a ring lock type scaffold and the vertical rod. A target high-frequency welded pipe is selected as a vertical rod main body; the gap between the disc buckle and the high-frequency welded pipe is controlled to be 0.3 mm-0. 7 mm through a positioning device; according to a preset target welding process specification, gas shielded welding wires are adopted to conduct angle welding with low welding heat input on the two sides of the disc buckle, and the value of the low welding heat input ranges from 3.23 KJ / cm to 4.94 KJ / cm. Therefore, the high-strength light-weight vertical rod is used, and the vertical rod and the disc buckle are welded according to the target welding process specification, so that the safety of the high-strength steel scaffold vertical rod in use is ensured, the mounting efficiency of the vertical rod is improved, and the working intensity of constructors is reduced.

The invention provides a Q890qE and Q420qE bridge steel flat butt joint combined welding method which comprises the following steps: step 1, grinding and derusting grooves of upper and lower asymmetric double-sided V-shaped joints to expose metallic luster; 2, preheating is conducted in an electric heating mode; 3, a solid welding wire CO2 gas shielded welding is adopted for backing welding of one weld joint on the upper V-shaped deep groove side; 4, welding seams are filled in the side of the V-shaped deep groove through submerged arc automatic welding, and the filling thickness is about 1 / 2 of the groove depth; 5, back gouging is conducted on the back face through carbon arc air gouging, and a carburized layer is polished and cleaned till metallic luster is exposed; 6, the V-shaped shallow groove is welded and filled; seventhly, the submerged arc automatic welding continues to weld the remaining weld joints of the V-shaped deep groove till the remaining weld joints are filled; and 8, postweld heat treatment is conducted. According to the method, a combined welding method of solid welding wire CO2 gas shielded welding bottoming, submerged arc automatic welding filling and capping is adopted, the problems of welding cold cracking and early joint breakage of the dissimilar bridge steel are solved by combining joint design, and the mechanical properties of a welding seam and a fusion area meet the standard requirements.

The invention belongs to the field of powder injection molding, and relates to a method for preparing a high-strength and high-toughness 6-series aluminum alloy through metal powder injection molding, which comprises the following steps: step 1, mixing 6-series aluminum alloy powder and a binder in a mixing mill to obtain a feed; 2, the feed is subjected to injection molding to form a green body; 3, the green body is subjected to catalytic degreasing through oxalic acid, and a brown blank is obtained; step 4, sintering the palm blank by using a vacuum degreasing sintering furnace and adopting inert gas protection negative pressure; and 5, the sintered sample is subjected to heat treatment, and a 6-series aluminum alloy product is obtained. The prepared 6-series aluminum alloy contains nano MgAl2O4 particles, the nano MgAl2O4 particles are distributed in a net shape at the grain boundary, the density of the 6-series aluminum alloy is larger than 99%, and the tensile strength of the 6-series aluminum alloy is larger than 350 Mpa.

The invention provides a high-wear-resistance and low-dilution gas shielded welding wire and a preparation method thereof, and belongs to the technical field of welding wire manufacturing. The welding wire consists of the following raw materials in parts by weight: 45-52 parts of iron; 18-22 parts by weight of an electrolytic nickel plate; 6-8 parts by weight of high-purity molybdenum powder; 4-6 parts by weight of nano tungsten powder; 3-4.5 parts by weight of a vanadium nitride alloy; 1.2 to 1.8 parts by weight of a niobium-iron alloy; 0.8-1.5 parts by weight of aluminum magnesium alloy powder; 0.3 to 0.6 part by weight of lanthanum cerium mixed rare earth; 0.15 to 0.25 part by weight of ferroboron alloy; 0.5 to 0.8 part by weight of metal silicon powder; 0.2 to 0.4 part by weight of a magnesium-calcium alloy; and 0.1-0.3 part by weight of titanium hydride powder. The hard framework is formed through gradient distribution of carbides such as molybdenum, tungsten and vanadium, the wear-resisting life is remarkably prolonged, melting mixing of base metal is reduced through the nickel-based alloy, the consistency of deposited metal components is ensured, free hydrogen is fixed through hydrogen trap phases such as titanium and niobium, and a moisture absorption path is blocked in combination with a surface passivation film.

The invention relates to an inner cavity curved surface welding line laser light path turning welding method which is used for solving the technical problem that an existing welding method is difficult to operate when curved surface welding is carried out in an inner cavity, and the method comprises the steps that a reflecting mirror is arranged on a light emitting path of a laser welding head, and original laser beams are deflected; the laser beam enters the inner cavity space and irradiates the to-be-welded area of the curved surface weld joint; surface cleaning and fixing are conducted on a to-be-welded area, and the folded laser beams are focused to the center of a welding seam; enabling the laser beam to perform scanning welding on the curved surface welding seam according to a preset scanning track; in the welding process, protective gas is jetted to the position, acting on the workpiece, of the laser beam so as to blow away welding spatter and provide gas protection for a welding seam. The propagation direction of laser beams is changed through the reflecting mirror, so that laser can enter the inner cavity to weld a curved surface weld joint, the application range of laser welding is expanded, and the problem that curved surface welding is difficult to operate in the inner cavity space through an existing welding method is solved.

The invention discloses gas metal arc welding equipment and an arcing method.The equipment comprises a welding gun, a welding power source and a shielding gas device, the welding power source and the shielding gas device are connected with the welding gun, the welding gun is connected with a wire disc through a servo wire feeder, and the welding power source comprises a main power source and an auxiliary power source. The double-power-supply structure of the auxiliary power supply and the main power supply is adopted, the auxiliary power supply is used for outputting arc striking current, small and stable electric arcs are formed in cooperation with wire drawing separation of the servo wire feeder after welding wires make contact with a welding product, the effects that arcing is stable, the welding wires are not melted or melted and not exploded can be achieved, arc breaking is avoided, the arc striking success rate is high, and the production efficiency is high. And after the electric arc is stable, the main power supply outputs the welding current to carry out normal set welding, so that the welding arc-starting splashing in a conventional large current impact arc-starting mode can be effectively avoided, the arc-starting success rate is improved, and the welding quality is improved.

The invention discloses a magnetic attraction synchronous walking type inert gas protection titanium alloy pipe welding robot which comprises a titanium alloy pipe to be welded, an active welding robot, a follow-up inert gas protection robot and a mechanical arm. After the two titanium alloy to-be-welded pipes are coaxially spliced, a circle of to-be-welded seam is formed at the splicing position; the active welding robot walks and is attached to the outer wall face of a titanium alloy to-be-welded pipe under connection of the mechanical arm, the follow-up inert gas protection robot walks and is attached to the inner wall of the titanium alloy to-be-welded pipe, and the follow-up inert gas protection robot and the active welding robot magnetically attract each other through a magnetic attraction device. The follow-up inert gas protection robot follows the active welding robot under the action of magnetic force; and no oxidation of a welding area is realized in an invisible pipeline by the equipment.

The invention relates to the technical field of welding equipment, and discloses steel product gas shielded welding equipment which comprises a machining table, a continuous automatic welding mechanism, a synchronous filtering and dust collecting mechanism and a flow adjusting mechanism. Side plates are vertically and fixedly arranged on the two sides of the top of the machining table, and a top plate is fixedly arranged on the tops of the side plates. According to the gas shielded welding equipment for the steel products, constant-speed automatic welding of the workpieces is achieved through the constant-speed automatic welding mechanism, and the situation that the welding quality is affected due to unstable connection of weld joints of welding rods and the workpieces due to the uneven welding speed is avoided; when the constant-speed automatic welding mechanism operates, the synchronous filtering and dust collecting mechanism is driven to collect and treat smoke generated during welding, air pollution caused by the smoke is avoided, and when the synchronous filtering and dust collecting mechanism operates, the flow adjusting mechanism is driven to automatically adjust the flow of protective gas. And instability of a protective dielectric layer formed by protective gas when the welding speed is different is avoided, so that the protective effect on the weld joint is improved.

The invention discloses a double-pulse gas shielded welding machine and a using method thereof, and relates to the technical field of double-pulse gas shielded welding machines, the double-pulse gas shielded welding machine comprises a welding machine main body, a mounting frame is fixedly arranged on the welding machine main body, a wire winding roll for winding a welding wire is arranged on the mounting frame, and a wire feeding unit is further mounted on the mounting frame; the wire feeding unit comprises a wire feeder body and a fixing pipe which are fixedly arranged on the mounting frame, a welding wire state detection mechanism is mounted on the inner side of the fixing pipe, and when a welding wire jumps in the radial direction, a pushing rod fixedly connected with a wheel seat can be pushed to slide relative to a top plate, and then a V-shaped swing rod is pushed to rotate around a second rotating shaft; the push rod drives the impact ball connected through the vibration spring to knock the copper sheet, the vibration spring is matched to improve the knocking frequency and the warning effect, abnormal jumping of the welding wire can be captured in the first time, the reset structure arranged on the outer side of the push rod in a sleeving mode can guarantee the stability of repeated use of the detection mechanism, and abrasion caused by radial jumping of the welding wire to an inner channel of a welding gun is effectively avoided.

The utility model belongs to the field of structure and function integrated magnesium-based materials, and particularly relates to a short-process casting device, an aluminum-containing magnesium-based material and a casting method and application of the aluminum-containing magnesium-based material. According to the device, firstly, a SiC / Al pre-dispersion bar is prepared, then magnesium liquid pouring, pre-dispersion extrusion material melting and external field auxiliary layer-by-layer rapid solidification integrated treatment is carried out, under the ultrasonic cavitation effect, the electromagnetic stirring effect and the effect of a water cooling mold, Al and SiC are rapidly and evenly distributed, meanwhile, dispersed SiC particles rapidly enter a pasty area, and finally, the Al and the SiC particles are evenly dispersed. The method realizes layer-by-layer rapid solidification, effectively solves the problems of agglomeration caused by lack of external field assistance in the solidification process in the prior art and agglomeration of particles pushed to the grain boundary by matrix grains due to slow solidification speed, and in order to prevent melt oxidation, protective gas is distributed in the water cooling mold, and gas protection is performed on the surface of the melt in the whole process.

A welding-type system for gas tungsten arc welding including control circuitry to control the initiation of a welding arc and the preflow and postflow of inert shielding gas based on sensed voltages.

The invention provides a vertical position welding method for bridge steel. The vertical position welding method comprises the steps that 1, a groove is manufactured, specifically, the X-shaped groove without a truncated edge is manufactured in a vertical position mode through a flame cutting technology; and the groove is polished and derusted according to requirements. 2, preheating, wherein the bridge steel is preheated to 75 DEG C in an electric heating mode; and 3, welding, wherein solid welding wire argon-rich mixed gas shielded welding is adopted for vertical position welding. And 4, post-weld heat treatment is conducted, specifically, after welding is completed, post-heat treatment is conducted at 200-250 DEG C through a crawler-type heater, and slow cooling is conducted to the room temperature after heat preservation is conducted for 3 hours. By researching and developing a welding material and a welding process matched with the Q890qE high-strength bridge steel, the technical problem of quality of a Q890qE vertical position butt welding seam is solved. Welding forming is stable, efficiency is high, deformation is small, the appearance is good, strength and weather resistance are balanced, the service life is long, and economical efficiency and environment friendliness are both considered; the method is especially suitable for engineering scenes with strict requirements on strength, toughness and durability such as long-span bridges and alpine region bridges, and has remarkable economic advantages and social value.

The invention discloses a split type gas shielded welding machine, and relates to the technical field of welding machines, the split type gas shielded welding machine comprises a bottom plate, a welding power source is arranged on the top of the bottom plate close to the edge of one side, one end of the welding power source is coupled with an equipment welding gun through a wire, and a gas tank used for conveying shielding gas to the welding gun is arranged on the top of the bottom plate close to the center. When the ship body welding device is used and before a ship body is welded, due to the fact that many impurities and metal particles exist on the surface of the ship body, in the welding process, firstly, the impurities on the surface of the ship body are cleaned through rotation of cleaning equipment, meanwhile, the surface of the ship body is heated through an infrared heating pipe, the follow-up ship body welding quality is improved, and meanwhile, the welding efficiency is improved. The two negative pressure pumps are started, negative pressure is generated in the dust collection bin, cleaned impurities are collected into the dust collection bin under the action of pressure difference to be collected, and through the action of the pretreatment assembly, the split type gas shielded welding machine integrates pretreatment, cleaning and welding.

The utility model provides a CFB stokehole storage device. The CFB stokehole storage device comprises a stokehole bin, a main control system, an oxygen detector, a temperature detector and a gas protection assembly, wherein the oxygen detector and the temperature detector are arranged in the stokehole bin; wherein the oxygen detector is used for detecting a real-time oxygen content signal in the furnace front bin and sending the real-time oxygen content signal to the main control system; the temperature detector is used for detecting a real-time temperature signal in the furnace front bin and sending the real-time temperature signal to the main control system; the main control system is used for controlling the gas protection assembly to input protection gas into the furnace front bin according to the real-time oxygen content signal and the real-time temperature signal. According to the utility model, multi-index automatic monitoring can be carried out on the stokehole bin in real time, and the stokehole bin can be protected in time through the protective gas under the condition that safety risks exist, so that the safety and reliability of stored articles are ensured.

The invention provides a welding device for power plant boiler installation, and belongs to the technical field of boiler installation and welding. Comprising a welding installation part, a knocking auxiliary part is installed on the welding installation part, the knocking auxiliary part is used for preventing the welding installation part from being damaged, an attaching installation part is installed on the welding installation part, a gas facing protection part is installed on the attaching installation part, and the gas facing protection part is used for ensuring the gas protection quality. A swing limiting piece is installed on the attaching installation piece and used for improving operation standardability, and a gas protection prompting piece is installed on the welding installation piece. The gas facing protection part is arranged to be matched with the attaching installation part to be used for limiting the operation standardization of workers, and the carbon dioxide protection quality is guaranteed; the problems that an existing welding device for installing the boiler of the power plant is inconvenient to automatically control and limit gas-facing welding of workers, and welding wires for carbon dioxide protection welding are also prone to being blocked by splashing objects are solved.

The invention relates to the technical field of powder material processing, and discloses an inert gas protected micro-powder impact mill system which comprises a crushing and grading module, an inert gas circulating module, a material closed conveying module and a safety monitoring and regulating module, the crushing and grading module comprises an impact mill and a worm gear grader, and a bottom discharge port of the impact mill is communicated with a top feed port of the worm gear grader through a sealing pipeline; the inert gas circulation module comprises a gas storage tank, an induced draft fan, a pulse type bag-type dust collector and a return air cooler, a gas outlet of the gas storage tank is in sealed connection with a gas inlet of the induced draft fan through a first communicating pipe with a control valve, and a gas outlet of the induced draft fan is communicated with a gas inlet of the impact mill through a second communicating pipe. By constructing a complete inert gas closed circulation loop and combining with a safety monitoring regulation and control module of the integrated control system, potential safety hazards caused when flammable, explosive and oxidizable materials are processed by an existing common impact mill are effectively solved.

The utility model discloses a movable tubular pile gas shielded welding windshield which comprises a radius adjusting cover and a perimeter adjusting block, the radius adjusting cover is of an arc-shaped structure, the inner ring of the radius adjusting cover is attached and adsorbed to the circumferential outer wall of a tubular pile, and the outer ring of the radius adjusting cover is symmetrical and is connected with a welding gun rod in an elastic tensioning mode. Perimeter adjusting blocks are telescopically inserted into two circumferential end surfaces of the arc-shaped structure of the radius adjusting cover. The windproof cover is used for covering and protecting the flame of the welding gun, can adaptively adjust the local covering radius and arc length according to the diameter of a pipe pile, can move along with the movement of the welding gun, and is simple in structure and easy to implement.

The invention belongs to the technical field of preparation of high-entropy alloy welding wires, and particularly relates to an L12-phase reinforced high-entropy alloy welding wire and a preparation method of a cladding layer of the L12-phase reinforced high-entropy alloy welding wire, and the L12-phase reinforced high-entropy alloy welding wire is characterized by comprising the following alloy components in percentage by weight: 5.4-8.3% of Al, 5.4-8.3% of Ti, 15.0-16.0% of Cr, 33.3-35.7% of Fe, 37.5-35% of Ni and the balance of C and inevitable impurities. The preparation method specifically comprises the following steps that (1) the stainless steel band is treated; uniformly mixing and drying the metal powder; metal powder is filled into the pipe strip, and the flux-cored wire is obtained after multiple times of rolling and drawing; (2) the surface of the welding base metal is treated; and (3) surfacing the flux-cored wire on the welding base metal by using gas metal arc welding. The high-entropy alloy welding wire has the beneficial effects that by optimizing the component design of the high-entropy alloy welding wire, the balance of strength and plasticity is achieved; a cladding layer obtained through a gas metal arc welding surfacing mode is compact and uniform in structure and free of defects, the cladding layer is well combined with a base body, and the localization target of nickel-based welding materials is achieved.

The invention relates to a welding method of Q345qD-IMEC corrosion-resisting steel for bridges, which comprises the following steps: selecting a welding material: adopting a combination of a welding wire and a welding flux for submerged-arc welding, adopting at least one of the following welding wires: a flux-cored welding wire and a solid welding wire for CO2 gas shielded welding, machining a groove: machining the groove according to a welding joint form, according to the welding process, the welding parameters of submerged arc welding are that the current is 620 + / -30 A, the voltage is 28 + / -2 V, and the welding speed is 34-36 cm / min; the welding parameters of CO2 gas shielded welding are as follows: the current is 140-270 A, the voltage is 26-30 V, the welding speed is 10-25 cm / min, and the gas flow is 16-22 L / min; and then post-welding detection is carried out.

The invention discloses a manufacturing method of a tantalum alloy T-shaped welding joint, and relates to the technical field of non-ferrous metal welding. The method comprises the steps that a tantalum alloy material is obtained, the performance and weldability are analyzed to determine a welding scheme, and a groove form and a gas protection device are designed; welding process parameters are optimized, and a gas protection device is adopted to complete welding; carrying out visual, macroscopic and microscopic detection on the welding seam to obtain a detection result; the method further comprises the steps of selecting matched welding wires, determining single-face V-shaped groove parameters, designing a gas protection device structure, optimizing welding current, treating a welding site and a material surface and the like. Compared with the prior art, the method can ensure the welding quality, maintain the material performance, realize high-precision welding, comprehensively evaluate the welding seam quality and improve the product reliability and safety.

The invention relates to an RH vacuum tank system and a combustion heating operation method, and belongs to the field of ferrous metallurgy vacuum treatment equipment. The system comprises a vacuum tank, a hot bent pipe, a top lance device, a vacuum air pump system and an automatic control system, the hot bent pipe is connected with the vacuum tank, and an automatic ignition device, an infrared temperature measuring device, a video monitoring device and a thermocouple are integrated in the hot bent pipe; the top lance device is of a water-cooling multi-layer sleeve structure, multiple stations are switched through a top lance rotating frame and a lifting trolley, and vacuum sealing is maintained. The method is based on multi-sensor cooperative control, low-temperature ignition, high-temperature spontaneous combustion and molten steel heating modes are automatically executed according to the temperature of a refractory material at the bottom of a tank and the temperature of molten steel, and combustion stability is ensured by dynamically adjusting the flow of fuel gas and oxygen. According to the scheme, through closed-loop ignition control, inert gas protection and intelligent monitoring, the safety is remarkably improved, and the gas explosion risk is avoided; full-automatic operation and precise temperature control are combined, the molten steel quality and the production efficiency are improved, and the device is suitable for refining production of high-value-added steel such as silicon steel and automobile sheets.

The invention relates to the technical field of laser welding, and particularly discloses laser welding equipment for instrument and meter production and manufacturing, the laser welding equipment for instrument and meter production and manufacturing achieves the purpose of stably clamping a circular workpiece, and the equipment is supported by an equipment bottom plate and an equipment bracket; the welding support supports the electric lifting table and the laser welding head, the laser welding head welds components, the protection device performs gas protection on the components, gas consumption is low while gas protection is performed in the welding process, and the density of pure inert gas is slightly larger than that of air, so that gas retention is facilitated, and the welding quality is improved. According to the welding device, the circular shell accessories are fixed and rotated through the corresponding assemblies, so that the welding requirements of different angles are met, meanwhile, liquid inert gas is gasified and heated through the pneumatic device, welding embrittlement caused by gas supercooling is avoided, and the error influence caused by fan vibration on welding is counteracted.

The utility model relates to the technical field of welding machines, and discloses a gas shielded welding machine for corner bracket production, which comprises a movable seat, a welding machine main body is arranged at the top of the movable seat, and an adjustable push handle positioned on the left side of the welding machine main body is arranged at the top of the movable seat. A welding gun pipeline assembly located on the right side of the welding machine body and connected with the welding machine body is arranged at the top of the movable base. According to the gas shielded welding machine for corner bracket production, by arranging a welding gun pipeline assembly and a protection assembly, firstly, a threaded rod is rotated to drive a protection frame to move upwards, so that a winding roller is opened, a worker can wind a pipeline outside the winding roller at the moment, and the welding gun pipeline is clamped in a U-shaped clamping seat at the moment; and at the moment, a fastening bolt is screwed off to fasten and limit the welding gun pipeline, then the purpose of winding and unwinding the pipeline can be achieved, then a threaded rod is rotated to drive a protection frame to move downwards to protect the pipeline, the practicability of the device is improved, and the device is convenient to use by workers.

The invention provides an ultrahigh-strength steel matched 1000 MPa-grade Co-containing gas shielded welding wire, ultrahigh-strength steel and a welding method. The ultrahigh-strength steel matched 1000 MPa-grade Co-containing gas shielded welding wire comprises the following components in percentage by mass: less than or equal to 0.12% of C, less than or equal to 0.6% of Si, 1.5-3% of Mn, less than or equal to 0.1% of V, less than or equal to 0.08% of Ti, 0.5-1.2% of Mo, 1.5-2.7% of Ni, 1.0-4.0% of Co and less than or equal to 1.1% of Cr, and the atomic ratio of Mo + V to C is 1-1.3. According to the ultrahigh-strength steel matched 1000 MPa-grade Co-containing gas shielded welding wire provided by the invention, the yield strength of deposited metal can be remarkably improved by optimizing the component design of the welding wire and adding a certain content of Co; when gas shielded welding is adopted, weld metal with high yield strength, high tensile strength, high elongation and high impact can be stably obtained, the tensile strength of deposited metal is larger than or equal to 1050 Mpa, the yield strength is larger than or equal to 1000 Mpa, the elongation is larger than or equal to 13%, and the impact energy at the temperature of 50 DEG C below zero is larger than or equal to 47 J.