422 results about "Shielding gas" patented technology

The utility model relates to the field of welding, and provides a welding device for welding in a narrow space. The welding device for welding in the narrow and small space comprises a nozzle, an inclined wire contact tube and a welding wire. The nozzle can vertically extend into the welding space; the inclined wire contact tube is partially inserted into the nozzle in an inclined mode, the extending end of the inclined wire contact tube can be located on one side of an opening in the tail end of the nozzle, a flow guide sleeve is detachably installed on the other side of the opening in the tail end, and the flow guide sleeve can partially shield the opening in the tail end of the nozzle. The welding wire is arranged in the inclined wire contact tube in a penetrating mode and can stretch out of an opening in the tail end of the nozzle so that an electric arc can be formed on one side of the nozzle. According to the welding device for welding in the narrow and small space, the nozzle can directly stretch into the welding space, the welding wire is conveyed to any welding position in the welding space through the inclined wire contact tube, and therefore the flow guide sleeve is additionally arranged on the nozzle to form a lateral gas supply structure, the whole molten pool is reasonably covered with protective gas, and the welding efficiency is improved. The problems of gas turbulence and molten pool protection are solved.

The present disclosure provides a vertical furnace. The vertical furnace comprises a furnace tube, a storage device, a loading device, a wafer boat, a first carrying device, a second carrying device and a gas system. A furnace chamber used for heating a wafer is arranged in the furnace tube. The storage device is provided with a storage chamber and a carrying table located in the storage chamber, and the carrying table is used for carrying a wafer box. The loading device is used for loading a wafer box for storing a wafer to be heated. The wafer boat is used for moving a wafer to be heated between the furnace chamber and the loading device. The first carrying device is used for moving the wafer box between the carrying table and the loading device. And the second carrying device is used for moving the to-be-heated wafer between the loading device and the wafer boat. And the gas system comprises a gas inlet port and a gas outlet port which are arranged on the carrying table, and is used for introducing protective gas into the wafer box through the gas inlet port and discharging the gas from the wafer box through the gas outlet port so as to inject the protective gas of which the pressure is greater than the environmental pressure into the wafer box. Consequently, pollutants in the environment can be prevented from making contact with the wafer, and the interior of the wafer box is clean.

The invention relates to the technical field of metal welding equipment, discloses a local hot melt welding device for a curtain wall aluminum plate, and aims to solve the problems that in the prior art, when a thin aluminum plate and a reinforcing rib are welded, fusion penetration, collapse and insufficient fusion depth are prone to occurring, and consequently the connection strength is not high. The device comprises a welding operation table, a supporting back plate, a clamping mechanism, a front limiting mechanism and a rear limiting mechanism, the front limiting mechanism and the rear limiting mechanism are arranged on the two sides of a welding gun, and the front limiting mechanism is provided with an inclined connecting part inserted into a welding seam and an arc-shaped bottom supporting strip and used for supporting a molten pool to prevent falling and guiding welding fluid to deeply fill so as to increase the combination area; the rear limiting mechanism trims a welding seam through the side edge of the notch and supplies protective gas, oxidation is prevented, heat dissipation is assisted, meanwhile, the device is provided with an angle limiting mechanism, the inclination angle of a welding gun can be accurately controlled, excessive heat concentration is avoided, the welding operation difficulty is reduced through structure optimization, and the welding efficiency is improved. And the welding seam quality, the connection strength and the safety and durability of the curtain wall structure are effectively improved.

The invention relates to the technical field of titanium alloy pipe manufacturing, and particularly discloses a preparation method of a titanium alloy thin-walled pipe with superplasticity, comprising the following steps: S110, annealing a titanium alloy bar below a phase transformation point in a vacuum annealing furnace; s120, the annealed bar material is subjected to reciprocating extrusion treatment; s130, the bar subjected to reciprocating extrusion treatment is subjected to forward extrusion to form a pipe blank; s140, the pipe blank is subjected to superplastic bulging treatment; s150, after superplastic bulging is finished, heat preservation is stopped, and inert shielding gas continues to be blown in for cooling to the room temperature; and S160, stress relief annealing is conducted on the thin-walled pipe obtained after superplastic bulging, and the titanium alloy finished pipe with superplasticity is obtained. According to the method, the plasticity of the titanium alloy pipe is remarkably improved through reciprocating extrusion and superplastic bulging, the deformability is improved, meanwhile, the grain size is regulated and controlled, and preparation of the high-performance and high-size-precision thin-wall pipe is achieved.

The invention relates to the technical field of welding, and discloses a deformation restraining process for ultra-low-speed argon arc welding of a high-nitrogen steel sheet. According to the deformation restraining technology for the ultra-low-speed argon arc welding of the high-nitrogen steel sheet, the flow of the protective gas is dynamically regulated and controlled based on the change of the arc pressure in the welding process so as to restrain the non-uniform oxidation rate of a molten pool; the welding temperature field is analyzed in real time, the welding gun swing path is adjusted to improve the structure uniformity, the welding current slope is adjusted in a self-adaptive mode to prevent incomplete root fusion according to welding temperature field feedback and the molten pool form change trend, and according to the molten pool surface tension change characteristic and the welding current slope adjusting result, the welding temperature field is adjusted in real time. And the arc length is subjected to closed-loop regulation and control to optimize the welding seam forming quality. According to the deformation restraining process for the ultra-low-speed argon arc welding of the high-nitrogen steel sheet, the problem that the welding seam quality fluctuates due to the uneven oxidation rate of a molten pool is effectively solved, and the consistency of the welding seam quality is guaranteed.

The invention relates to the technical field of metal cutting, and particularly discloses an intelligent laser cutting device and method for steel machining. The intelligent laser cutting device comprises a machine base, a moving assembly is arranged at the top of the machine base, a laser head used for emitting laser is fixed to the inner side of the moving assembly, and the moving assembly is used for controlling the laser head to move; the side face of the clamping plate is provided with a clamping piece used for clamping a steel pipe, through cooperation of the structure, the collecting cover can collect metal slag blown by protective gas, and the situation that the metal slag flies into and adheres to the inner wall of the pipe, and then the quality of the pipe is affected is avoided; and meanwhile, the elastic bag can play a certain role in supporting the inner side of the steel pipe, and materials around the cutting position of the steel pipe are prevented from being softened by heat generated during cutting, so that the situation that the produced steel pipe is deformed due to the fact that the high pressure of the protective gas impacts the softened pipe wall is reduced, and the quality of the cut pipe is further improved.

Equipment for automatically replacing a contact tube based on a robot welding gun comprises a shielding gas nozzle dismounting and mounting device, a contact tube dismounting and mounting device, a contact tube tightening device and a contact tube conveying device, and the equipment is driven by a pneumatic mechanism; each of the shielding gas nozzle dismounting device, the contact tube dismounting device and the contact tube tightening device comprises a spring structure; the contact tube conveying device comprises a contact tube box. Compared with a traditional motor driving mode, a pneumatic driving mode is combined with a spring structure design, so that the disassembly and assembly process and debugging are more convenient.

The invention discloses a self-protection flux-cored wire and a production method thereof. The preparation method of the self-protection flux-cored wire comprises the following steps of S1, material treatment, S2, machining and treatment, S3, quality detection and S4, packaging and transportation. According to the target performance of the welding wire, a powder formula is elaborately designed, and the formula generally comprises a slag former for forming slag, protecting a molten pool, controlling metallurgical reaction of the molten pool and improving welding seam forming, a deoxidizer for removing oxygen and nitrogen in the molten pool and preventing pores and embrittlement, and a gas-making agent for generating protective gas through thermal decomposition, a gas hood is formed at the end of the flux-cored wire to isolate air, alloy elements are added into deposited metal to achieve required chemical components and performance, an arc stabilizer is used for improving arc stability, and a small amount of binder is added sometimes to improve powder fluidity or keep the shape after filling, so that the application range of the flux-cored wire is widened, and the flux-cored wire is suitable for industrial production. And the device is suitable for various working environments, and the production quality of the flux-cored wires is improved.

The invention provides a carbon emission calculation method and system for an automobile aluminum alloy laser welding system, and the method comprises the steps: determining the boundary of the laser welding system according to an aluminum alloy laser welding technology, and then constructing an equipment model of each equipment of the laser welding system according to the boundary of the laser welding system; corresponding equipment carbon emission is determined according to the working process of each equipment model during laser welding; and constructing a system carbon emission model according to each equipment model and the corresponding equipment carbon emission, and then importing the operation data of each equipment recorded in the laser welding process into the system carbon emission model to obtain the carbon emission of the aluminum alloy laser welding system. The method solves the problems that in the prior art, a carbon emission model of a laser welding technology mainly calculates carbon emission of a laser welding system from the energy angle, and consumption of materials such as protective gas, compressed air and welding wires and carbon emission of corresponding equipment in the laser welding process are not considered; therefore, the problem of inaccurate carbon emission calculation of the laser welding process is solved.

The invention provides an automatic mechanical arm device, and belongs to the technical field of mechanical arms, the automatic mechanical arm device comprises a multi-axis servo mechanical arm and a laser welding head, the laser welding head is connected with a gas generator, the laser welding head is connected with an air injection seat and a laser channel cylinder, the air injection seat is connected with an air cylinder, and the automatic mechanical arm device further comprises a pollution discharge assembly, the pollution discharge assembly is used for removing smoke dust attachments after welding in the air outlet cylinder; the throttling assembly is used for circularly absorbing part of gas; the device has the beneficial effects that active cleaning of smoke dust attachments on the inner wall of the air outlet cylinder is achieved through the pollution discharge assembly, external washing equipment is not needed, a traditional maintenance means is avoided, the stability of the drift diameter of an air path is maintained, it is ensured that protective gas is output uniformly, the welding accuracy and efficiency are improved, and the throttling assembly restrains diffusion of the protective gas through an umbrella-shaped throttling cover; and meanwhile, unpolluted redundant protective gas is recycled, and the consumption of the protective gas is reduced.

The invention relates to the technical field of PID control, in particular to an intelligent solar saving control method and device based on PID. The method comprises the following steps that a welding current-target flow velocity relation model is loaded, and PID parameters are initialized; then welding current is collected in real time, and the corresponding target flow velocity is calculated; comparing the target flow velocity with the actual flow velocity to obtain an error signal, and generating a control output quantity through PID control; then the control quantity is converted into an opening adjusting signal of the electric control proportional valve, and dynamic adjustment of the flow rate of the protective gas is achieved; and finally, current input, target generation, error calculation and valve regulation are executed circularly, and real-time closed-loop gas saving control in the welding process is achieved. Fine real-time intelligent control over the protective gas is achieved through welding working condition recognition, target flow velocity modeling and PID closed-loop self-adaptive regulation and control, the welding stability and the welding seam quality are improved, gas consumption is remarkably reduced, and the responsiveness and reliability of device operation are improved.

The application discloses a kind of laser welding device and welding method for heat exchanger connecting pipe processing, it is related to technical field, including welding frame, the welding frame outside is provided with welding machine, welding frame bottom is fixedly connected with mobile platform, further include: fixed plate, fixed plate is set to mobile platform mobile end, fixed plate top is provided with two mobile seats, the top of two mobile seats is fixedly connected with fixed ring, the fixed ring inside is provided with clamping mechanism, between one of fixed ring and fixed plate it is provided with screw rod for moving;The welding place of two pipe fittings is arranged in the sealed spherical shell, and the inside of it is filled with protective gas before welding, air is exhausted, oxygen is discharged during welding, reaction of metal and oxygen under high temperature is avoided to generate oxide, the purity and mechanical properties of weld metal are guaranteed.Simultaneously, after air is replaced, nitrogen, water vapor and other gases are not rolled into molten pool, significantly reduce the internal porosity defect of weld.

The invention relates to the technical field of coating materials, in particular to a method for preparing an anti-corrosion and wear-resistant iron-based amorphous coating through a laser cladding technology, which comprises the following steps: preparing an iron-based amorphous alloy powder raw material based on a gas atomization method, and pretreating the iron-based amorphous alloy powder raw material; selecting a base material, and pretreating the base material to obtain a finished base material; a laser generator is used for melting the surface layer of the finished product base material and the synchronously fed iron-based amorphous alloy powder raw material to form an amorphous coating, and shielding gas is introduced for cooling to the room temperature; compared with a traditional laser cladding technology, the method has the advantages that drying, moisture removal, protection gas introduction for protection and pore reduction are carried out after the iron-based amorphous alloy powder raw material is prepared, hot isostatic pressing is carried out on the prepared amorphous coating, the corrosion-resistant and wear-resistant iron-based amorphous coating is obtained, and the corrosion-resistant and wear-resistant iron-based amorphous coating is obtained. And pores and microcracks are eliminated, the structure is refined, and the quality of the anti-corrosion and wear-resistant iron-based amorphous coating is improved.

The patent relates to a full-automatic stacking and sealing welding system, belonging to the technical field of welding equipment. The system contains a welding robot, a three-axis truss with a three-dimensional displacement mechanical gripper, a positioner located in the middle of the three-axis truss and adjacent to the welding robot, a conveying line for conveying the inner barrel to the positioner, an air charging device and a storage table located on both sides of the positioner respectively. When automatic welding is performed, the outer barrel body is grabbed by the mechanical gripper of the three-axis truss from the positioner, and then the barrel cover is taken away and stored, and the inner barrel body is grabbed and placed in the outer barrel body on the positioner; then the barrel cover is grabbed back and moved to a predetermined distance above the outer barrel body on the positioner, the air charging device is turned to charge the protective gas into the outer barrel body, the mechanical gripper closes the barrel cover, and the positioner cooperates with the welding robot to complete the automatic sealing and welding of the outer barrel and the barrel cover. The present application significantly reduces the labor intensity, greatly improves the work efficiency, and ensures the stable welding quality.

The present disclosure relates to a nozzle unit for lateral shielding gas supply of a laser processing head, the nozzle unit comprising: a shielding gas nozzle; a holding device to which the protective gas nozzle is fixed; and an adapter for fixing the holding device to the laser processing head, wherein the holding device and the adapter are detachably coupled to each other by means of magnetic force. The disclosure also relates to a laser machining head having such a nozzle unit.

The invention belongs to the field of Ti / Al laser melt-brazing, and discloses a titanium-aluminum dissimilar metal laser short fiber implantation-melt-brazing integrated welding and visualization system which comprises a mechanical arm, a laser beam, a laser short fiber implantation nozzle, a wire feeding head, a shielding gas nozzle, a Ti plate, a clamp, a horizontal fine adjustment mechanism and a turnover mechanism. The method comprises the following steps: firstly, implanting Ti short fibers into a Ti butt joint surface through low-power laser, and forming a'implantation 'rough interface with an extremely high specific surface area on the surface of the short fibers after the short fibers are partially molten; and secondly, after the Ti plate is overturned by the overturning mechanism, the abutted seam gap is automatically adjusted, and Ti / Al laser melt-brazing is carried out by adopting high-power laser. In this way, the heterogeneous interface is promoted to form a riveting interlocking mode, and the strength of the heterogeneous interface is greatly improved. And finally, representing the welding process by adopting a numerical simulation technology to obtain a heat transfer flow behavior so as to guide process regulation and control.

The medium-thickness plate aluminum alloy composite welding system comprises a stirring head and a double-wire welding gun, the stirring head is arranged on a special machine and is driven by the special machine to move in the welding direction, and the double-wire welding gun is arranged at the tail end of a robot in the using state and is driven by the robot to move in the welding direction during welding. The stirring head is arranged in the front and used for conducting friction stir welding on the splicing position of the two medium-thickness aluminum alloy plates, and the double-wire welding gun is arranged in the rear and used for conducting covering welding on indentations left by welding of the stirring head on the two medium-thickness aluminum alloy plates. The friction stir welding process is firstly adopted, the problems of fusion welding air holes and fast heat conduction of materials are solved, the welding efficiency is high, beveling before welding is not needed, welding materials and protective gas are saved, then double-wire arc welding is adopted for fast cosmetic welding, the problem that friction stir welding seams are slightly lower than base metal is solved, the cosmetic welding seams are thin, most bubbles can directly overflow, and the welding efficiency is high. And air holes are avoided.

The invention relates to the field of laser welding quality detection, in particular to a multi-modal fusion identification method and system for laser welding defects of copper-aluminum heterogeneous materials. Molten pool images, temperature fields and acoustic emission signals are synchronously collected through a visible light high-speed camera, a thermal infrared imager and an acoustic emission sensor which are coaxially integrated; the width oscillation amplitude, the trailing edge solidification angle, the interface temperature gradient, the acoustic emission characteristic frequency band energy ratio and the burst signal counting rate of the molten pool are extracted; constructing a fusion vector input adaptive weighted deep neural network model, and identifying four types of defects of pores, cracks, incomplete fusion and interface brittle compound layer standard exceeding in real time; and the identification result triggers laser power modulation or protective gas proportion adjustment. The problems that in the prior art, multi-physical field perception is insufficient, the feature adaptability of heterogeneous materials is poor, and real-time control is lack are solved, the defect detection rate reaches 98.2%, and control response delay lt is achieved; and 50ms.

The invention provides a thermocouple verification furnace which is a vertical verification furnace and comprises a furnace core assembly, a one-way atmosphere protection device and a thermocouple positioning device. Through the design of the heat insulation layer, the highest temperature can reach 1800 DEG C, the upper limit of 1600 DEG C of a traditional high-temperature verification furnace is broken through, platinum and other high-melting-point materials can be melted, verification is carried out when the temperature exceeds 1600 DEG C, calibration is carried out through a fuse method by utilizing pure metal materials, and the calibration precision is improved; a vertical furnace is adopted to solve the problem of high-temperature deformation in the gravity direction of a furnace tube of a common horizontal thermocouple verification furnace; in the verification process, the whole process is protected by using the protective gas, so that the detected thermocouple is prevented from being oxidized under the high-temperature verification condition.

The utility model provides a blowing cavity and a welding protection device, and relates to the technical field of welding tools. The air blowing cavity comprises a first wall face and a second wall face. The blowing cavity is provided with a plurality of airflow channels and a plurality of welding channels, the airflow channels are located between the first wall face and the second wall face, the welding channels penetrate through the first wall face and the second wall face, the first wall face is provided with a plurality of air inlets, the air inlets are communicated with the airflow channels in a one-to-one correspondence mode, and the welding channels are provided with air outlets. The air outlet is communicated with the airflow channel. Therefore, in the welding process, the multiple electromagnetic valves can be controlled to input the protective gas into the different air inlet holes according to the welding condition, and the protective gas flows out of the air outlet holes along the airflow channel and is finally blown into the welding channel which is conducting welding operation, so that synchronous or successive blowing of the multiple welding channels according to the process requirement is achieved, and the welding efficiency is improved. Therefore, the welding efficiency is effectively improved.

The application provides a pipeline plugging assembly and a pipeline plugging and welding method. The pipeline plugging assembly comprises a fixed plugging part and a sealing plug in a pipeline to be welded. The fixed plugging part and the sealing plug are respectively sealed and filled on opposite sides of a welding position, or the fixed plugging part is sealed and filled on one side of the welding position. The fixed plugging part is a block structure or a sheet structure made of a surfactant. The sealing plug is provided with a through hole for a protective gas pipe to pass through. The protective gas pipe is used for filling protective gas into a sealed area where the welding position is located. The sealing plug can move in the pipeline to be welded under the pulling of the protective gas pipe. The fixed plugging part does not produce carbide, and solves the hidden danger of pipeline plugging. The sealed area where the welding position is located has good sealing performance, and can fully protect the root weld. Part of grease in the pipeline can be removed, an alkaline environment is formed in the pipeline to protect the boiler, and the welding efficiency of the pipeline is improved.

The invention discloses a method for inhibiting decarburization of 30CrMnSiA alloy steel with assistance of ethanol, which is used for inhibiting formation of a decarburization layer on the surface of the 30CrMnSiA alloy steel by strictly controlling heat treatment parameters and adopting mixed gas as a protective atmosphere. According to the method, the decarburization phenomenon of the 30CrMnSiA alloy steel can be efficiently prevented by accurately adjusting the components of the protective gas in the furnace and strictly controlling heat treatment parameters, meanwhile, the method is low in production cost, easy and convenient to operate and high in production efficiency, can meet the requirements of the modern industry for rapid and large-scale production, and has important engineering significance.

A gas saving type gas shielded welding mechanism is characterized in that a rectification power supply circuit outputs direct current to a full-bridge frequency conversion circuit, a main controller drives the full-bridge frequency conversion circuit through a frequency conversion control module, the full-bridge frequency conversion circuit outputs frequency conversion alternating current to an alternating current output circuit, and the alternating current output circuit outputs alternating current. The alternating current output circuit is further connected with an alternating counting control circuit, the output end of the alternating counting control circuit is connected with a gas circuit control valve, and the gas circuit control valve is arranged on a gas supply pipeline of a welding machine protection gas gun. The device has the beneficial effects that the supply amount of protective gas can be reasonably controlled according to actual working conditions by combining the frequency control technology of the welding machine and carrying out low-cost transformation, and excessive gas waste is avoided.

The application relates to the field of electric connectors, in particular to a welding assembly method of a semi-rigid cable electric connector, which comprises the following steps: removing the oxide layer of the semi-rigid cable; assembling the semi-rigid cable and a welding cup and initially filling solder; performing primary welding under the protection of a protective gas; detecting the perpendicularity to determine whether the primary welding meets the standard, if not, the temperature rising rate is increased according to the difference; after meeting the standard, performing secondary solder filling and welding, detecting the fluctuation characteristic value of the welding surface, judging whether the secondary solder filling and welding meet the standard according to the fluctuation characteristic value; if not, judging whether the secondary solder filling and welding meet the standard according to the conductivity; if still not, judging the reason for not meeting the standard according to the fluctuation difference of the welding surface, and adjusting the corresponding parameters according to the reason. Through dynamic optimization of the multi-stage welding parameters, the application realizes the accurate butt joint of the semi-rigid cable and the welding cup, and overcomes the problem that the semi-rigid cable and the welding cup are prone to being inclined and out of concentricity in the welding process.

Welding system, comprehensive: a robot control module (512) configured to actuate a robot (508) and to move a welding device along a joint of metal workpieces during welding, the welding device being attached to the robot (508); a welding control module (516) configured to apply power to the welding machine, supply shielding gas to the welding machine and supply electrode material to the welding machine during welding; an image sensor (550) configured to optically measure N distances between the image sensor (550) and N locations on an outer surface of a weld bead produced along the joint by the welding machine during welding, where N is an integer greater than two; and a welding module (1116) configured for this purpose: to determine the strength of the weld bead at a point along the joint, based on: the N intervals at the point along the connection; and at least one parameter from (a) the robot control module (512) during welding, (b) the welding control module (516) during welding and / or (c) a sensor (554) configured to receive data from to capture welding during the welding process; and to store the strength of the weld and the location in the memory (1120).

The invention discloses a follow-up type back shielding gas device for vacuum laser welding, relates to the technical field of welding, and aims to solve the technical problems that the welding quality, the mechanical property and the service life are reduced and the size of a workpiece is out of tolerance due to metal vapor deposition. By means of the double air curtain design of inner-layer main protection and outer-layer auxiliary isolation, negative pressure suction is matched, high-purity argon is accurately distributed, invasion of harmful gas is thoroughly blocked, and the welding metallurgy quality is guaranteed from the source; by means of a three-stage system of magnetic attraction pre-separation, foam nickel interception and activated carbon fiber deep purification, metal steam impurities with different particle sizes are efficiently intercepted, the situation that deposition influences the welding seam precision is avoided, and the welding high-precision assembly requirement is met; a thermal response self-excited vibration structure is integrated, the adsorption material is driven by material thermal expansion difference to circularly deform, particles are vibrated off to prevent blockage, the adsorption efficiency and airflow channel stability in the welding process are maintained, frequent shutdown is not needed, and continuity and high-quality output of vacuum laser welding are guaranteed.

This invention relates to an autonomous welding machine system utilizing shielding gas energy storage and its usage method. The system includes a pressure vessel storing high-pressure liquid shielding gas. The pressure vessel's output is connected to the inlet of a heat exchanger. An outlet of the heat exchanger, connected to the inlet, leads to the welding torch's outlet. A pump is connected to the outlet of the heat exchanger, with its output connected to the workpiece and the welding torch, and then to the inlet of the heat exchanger, forming a circulating flow of the working fluid. An expander is connected in series between the outlet of the heat exchanger and the welding torch. The expander's power output is connected to a generator, and the generator's output is electrically connected to the welding machine. Thus, relying on the shielding gas energy storage in the pressure vessel, the system achieves the necessary cooling, gas protection, and welding power supply during welding, greatly simplifying welding support requirements, optimizing welding operations, and realizing autonomous welding processes. It is particularly suitable for on-site welding operations in the field.

The utility model discloses a kind of full-position welding machine heads for non-ferrous metal pipe tube plate sealing type, including pipe orifice plug-in tooling, sealing sleeve, front end box, rear end box, welding torch, motor, adjusting slide and shielding gas delivery pipe, the pipe orifice plug-in tooling one end passes through the round hole on the front end box and is rotatably connected with the bearing seat located in the side of L-shaped seat, the other end part of the pipe orifice plug-in tooling is located in the sealing sleeve interior, the front end box interior is equipped with shielding gas delivery pipe.The utility model has the advantages that: by sealing sleeve, the welding part that extends into its interior is separated from external air, and residual air in sealing sleeve interior is discharged by filling shielding gas in sealing sleeve interior, the color of welding part after welding is unchanged;Different specifications of sealing sleeve are used, and the connected welding torch is adjusted by cooperating adjusting slide, and the tooling welding of different diameter non-ferrous metal pipe can be coped with.

The utility model discloses a composite tube plate integral serial sheet type protective gas cooler, which relates to the field of protective gas cooling and comprises an outer shell, heat exchange tubes and fins. The outer shell comprises a U-shaped protective plate, side plates and a first tube plate, the pair of side plates are fixedly installed on the U-shaped protective plate, the heat exchange tubes are U-shaped heat exchange tubes and are integrally bent, the U-shaped heat exchange tubes are installed in the outer shell, integral fins are connected to the U-shaped heat exchange tubes in an expanded mode, and the first tube plate and the second tube plate are fixedly installed on the outer shell. The first tube plate is fixedly installed on the pair of side plates on the opposite side of the U-shaped protection plate to form an outer shell, the second tube plate is fixedly installed on the other side of the first tube plate through a connecting protection piece, and the water chamber is fixedly installed on the second tube plate. And a heat exchange tube is blocked, a welded junction is heated at high temperature, and water leaks into the furnace once the welded junction cracks, so that the dew point of shielding gas is increased.

The invention relates to a method for additively manufacturing a component, in particular a chromium-nickel steel component, in which method a plurality of material layers are deposited on top of one another by means of arc build-up welding by melting a welding filler material, in particular a wire-shaped welding filler material, under shielding gas. The aim of the invention is to improve the practicability of manufacture and the usability of the component. This aim is achieved in that the material layers are formed by an austenite-containing steel, wherein the shielding gas is formed predominantly by argon and, with a volume fraction of 1-15%, preferably of 3-10%, nitrogen in order to form a nitrogen fraction of the steel alloy using the nitrogen of the shielding gas.