1026 results about "Shielding gas" patented technology

The invention provides a self-adaptive teaching-free welding robot intelligent gas saving monitoring system, which relates to the technical field of industrial robots, and comprises a three-dimensional sensing module used for identifying the workpiece material category through a multispectral sensor integrated with a welding gun of a welding robot, meanwhile, a stereoscopic vision camera and a line structure light scanning camera are used for obtaining three-dimensional point cloud data of the welding seam in real time; the parameter adjusting module is used for calling a heat conductivity coefficient database based on the three-dimensional point cloud data, and correcting the initial flow of the welding current, the arc voltage and the protective gas in real time; and the matching control module is used for calculating the arc length variable quantity based on the arc voltage, controlling the opening degree of the gas flow valve through a dynamic regulator, realizing dynamic matching of the gas flow and the changed arc length, and generating gas dynamic matching control parameters. Through cooperative operation of self-adaptive attitude compensation and real-time gas consumption monitoring, teaching-free accurate operation in the welding process is achieved, and intelligent control over gas consumption is improved.

The invention discloses an intelligent robot for body-in-white welding, and relates to the technical field of welding robots, the intelligent robot comprises a base, a robot joint arm and a welding head, the robot joint arm is installed on the base, the welding head is installed at the end, away from the base, of the robot joint arm, and the upper end of the welding head fixedly communicates with a wire feeding pipe; the wire feeder is installed on the upper portion of the base, the end, away from the welding head, of the wire feeding pipe is installed on the wire feeder, the inner scraping ring and the outer scraping ring can clean the inner surface and the outer surface of the welding head, blockages such as splash welding slag generated by welding on the inner surface and the outer surface of a nozzle of the welding head can be scraped away, smooth circulation of protective gas is guaranteed, and a good welding environment is maintained. The conditions that if welding wire residues remain on the inner wall of the contact tube, friction can be increased in the follow-up welding wire conveying process, abrasion occurs, and the hole diameter becomes large are avoided, impurities prone to abrasion can be removed in time through cleaning, components can be kept in a good initial state, and the normal service life of a welding head is prolonged.

The invention provides a welding tool for an automobile rear auxiliary frame cross beam, and belongs to the technical field of automobile cross beam welding, the welding tool comprises a base, a rear auxiliary frame main body, an operation table and a welding robot, and the operation table and the welding robot are arranged on the base, and the welding tool further comprises a positioning splicing assembly and a flow guide destressing assembly; protective gas is integrated on the third clamping jaw, the third clamping jaw can effectively guide protective gas flow to a welding seam while fixing the side cross beam, and effective flow guide of the protective gas can be achieved in cooperation with arrangement of the movable spraying pipe; during welding, the impeller is static to block gas, the flow speed is reduced, welding fluid is prevented from splashing and losing due to overlarge airflow impact, and stable combustion of welding arcs is maintained; in the cooling stage after welding is completed, the inductor controls the electromagnetic base to be powered off, gas flow is increased, the cooling speed is increased, meanwhile, vibration is generated to be matched with cooling to eliminate welding residual stress, the stability and reliability of a weldment are improved, the production period can be shortened, and the production efficiency is improved.

The invention discloses an intelligent argon arc welding machine based on case machining and a welding method, and relates to the technical field of case machining, the intelligent argon arc welding machine comprises a control box and a welding clamp, and further comprises a welding gun, the welding gun is composed of a grab handle and a welding head, and the welding head is fixedly connected with the grab handle through a butt joint sleeve; the welding head is composed of a welding part and an air injection part, and the welding part comprises a first welding pipe and a second welding pipe. The device has the advantages that when plates are welded, the conveying flow of the protector can be automatically changed according to the inclination angle of the welding gun, so that the protector is conveyed at the optimal flow, the protection effect of the protector is improved, the loss of shielding gas is reduced, meanwhile, the spraying speed of the shielding gas can be kept constant in the shielding gas changing process, and the probability of bubble generation is reduced; in addition, when the shielding gas is jetted, the protector is made to be perpendicular to the welding position all the time, and the protection effect of the shielding gas can be improved.

The invention relates to the field of welding devices, and discloses a laser swing welding device and a welding method.The laser swing welding device comprises a supporting table, an adjusting mechanism, a swing mechanism, a laser welding head, a gradient temperature changing mechanism, a housing, an air supply mechanism, an air injection preheating mechanism and a clamping mechanism; the adjusting mechanism is arranged on the supporting table and connected with the gradient temperature changing mechanism so as to change the welding position of the laser welding head. A first plate body and a second plate body are placed on the supporting table so as to be limited by the clamping mechanism. The laser welding head is rotationally arranged on the housing and driven by the swing mechanism so as to conduct swing welding on the welding position between the first plate body and the second plate body. Through cooperation of the gradient temperature changing mechanism, the ultrasonic transducer and the gas supply and jet preheating mechanism and cooperation of the eccentric driving disc and the swing frame, preheating of protective gas, gradient cooling after welding and heating are achieved, thermal stress and thermal shock are reduced, the welding seam performance is improved, laser energy is evenly distributed, and the welding quality of dissimilar metal plates is improved.

The invention relates to the technical field of welding assistance, in particular to an auxiliary device for metal pipe welding, which comprises a welding machining table, a sliding groove is formed in the welding machining table, and a first moving frame and a second moving frame are arranged in the sliding groove in a sliding manner; the first moving frame and the second moving frame are each provided with a first through groove allowing a metal pipe to penetrate through, and the first moving frame and the second moving frame are each provided with a sealing mechanism used for sealing the corresponding first through groove. According to the auxiliary device for metal pipe welding, by starting air cylinders on a first fixing frame and a second fixing frame, a laser welding machine is located over a welding seam, and as two second moving frames drive a second annular frame to be attached to the surface of a rotating ring, multiple sealing rings can abut against one another, the welding seam is made to be in a relatively-sealed environment, and the welding seam is welded. At the moment, the welding seam can be located in the space filled with the protective gas without dead angles by introducing the protective gas.

The present invention provides a handheld laser welding device, belonging to the technical field of laser welding, which is used to solve the problem that in the prior art, the integration of the welding torch and the interface greatly reduces the interchangeability between the welding torch and different laser hosts, restricting the versatility and flexibility of the equipment. The present invention provides a handheld laser welding device, comprising a welding torch head and an output interface that are inserted into each other in a matching manner. The other end of the welding torch head is used for welding, and the other end of the output interface is used for connecting to the host through a wire harness; the insertion interface between the welding torch head and the output interface includes: a laser matching group, a cooling matching group, a shielding gas matching group, and an electrical signal matching group. By optimizing the connection method between the handheld welding torch and the laser host and designing a standardized quick plug-and-play connection interface, both the high reliability of the connection and the high interchangeability of the welding torch are achieved.

The invention provides a production process for stably controlling adhesive force of a DP steel zinc layer. The production process comprises the following steps: step 1, setting a heating section 1, a heating section 2 and a furnace nose section in a total radiation heating annealing furnace; 2, according to the model and thickness of DP steel, target dew points of a first heating section, a second heating section and a furnace nose section are set; 3, according to the target dew points set in the first heating section, the second heating section and the furnace nose section in the step 2, water vapor is put into the protective gas for humidification, and the water vapor reacts with Si, Mn and Cr elements enriched on the surface of the steel plate to generate volatile oxides; the dew point of the annealing furnace is precisely controlled in a segmented mode, different humidification modes are adopted, and the surface state is controlled, so that surface oxide residues are reduced, cleanliness of a steel substrate is guaranteed, and the binding force of a zinc layer is improved; the iron oxide layer formed on the surface of the steel plate enters a reducing atmosphere annealing furnace containing hydrogen, the hydrogen can reduce the iron oxide layer on the surface of the steel plate to form a reduced iron layer, and the adhesive force of a zinc layer is improved.

The invention belongs to the technical field of welding, and provides a laser welding tool and method for a thin-wall titanium alloy runner plate. A small-diameter welding wire is adopted, the laser power is adjusted, protective gas purging is started, and laser welding is conducted in the anticlockwise direction from the left lower portion; in the welding process, active cooling is carried out at the same time until welding is completed; after welding is completed, the fixing module is detached; the active cooling specifically comprises the steps that absolute ethyl alcohol is sprayed on the welded surface, after absolute ethyl alcohol on the surface of the cold plate (3) to be welded volatilizes completely and ventilation is kept for 2 min, protective gas is started again for purging for 10 s, and one-time active cooling is completed. The method is used for solving the problem that a laser welding method in the prior art easily causes heat accumulation deformation of the titanium alloy sheet, so that the welding precision of the sheet is ensured.

The invention provides a robot welding machine, and belongs to the technical field of welding robots, the robot welding machine comprises a robot body, and further comprises a shunting heat conduction assembly and a supporting cleaning assembly; protective gas forms focused gas flow through shunting and secondary shunting, and gas flow sprayed by the cooling channel and the permeable plate is uniformly mixed under the guidance of a conical space at the front end of the nozzle, so that the concentration distribution of the protective gas above a molten pool is consistent, and the welding seam quality is improved; trace moisture in the protective gas is treated under the action of centrifugal force of the turbofan, and water vapor generated by falling and evaporation of water drops is guided to the periphery of the gas hood and cannot intrude into a molten pool area; the heat conduction cylinder rotates to enable airflow to sweep the whole surface of the contact tube, local overheating and heat dissipation dead angles are avoided, and the normal working temperature of the contact tube is guaranteed; the airflow can clean splashing particles attached to the outer side of the contact tube and the inner wall of the nozzle, the scraping arm can be tightly attached to the cleaning face in the rotating process and can abut against the contact tube, the deformation possibility of the contact tube is reduced, and the continuity and stability of the welding process are guaranteed.

The invention relates to the technical field of building construction welding, in particular to steel structure electric arc welding equipment for building construction. The device comprises a welding gun, a nozzle structure is installed at the bottom of a welding head connecting pipe in a threaded mode, the nozzle structure comprises a hollow spraying pipe and a contact tube extending from the interior of the welding head connecting pipe, an isolation inner pipe is installed in the spraying pipe in a clamped mode, and a gas flow channel formed between the spraying pipe and the contact tube is separated through the isolation inner pipe. The external expansion structure at the lower end of the isolation inner pipe is matched with the height difference between the bottom end of the isolation inner pipe and the bottom end of the spray pipe, physical shielding is formed, and high-temperature splashes entering the external sub-runner during welding are reduced; therefore, adhesion on the inner wall of the outer sub-runner is effectively avoided, the outer sub-runner is kept smooth all the time, and stable conveying of the protective gas is guaranteed.

The invention provides a stainless steel ultra-thick plate laser welding method and device, and the method comprises the steps that a to-be-welded end face of ultra-thick stainless steel is subjected to groove machining, the groove form is a combined form of a large truncated edge and a U-shaped groove, with the groove as a boundary, one end is a first base material, and the other end is a second base material; placing the workpiece according to a corresponding welding method, tightly butting the first base metal and the second base metal, fixing by using a clamp, and then cleaning a to-be-welded surface; the relative positions of the laser beam and the protective gas hood and the base metal are adjusted according to parameters required by the process, and a welding path is programmed or demonstrated; setting welding process parameters; and opening a protective gas valve, starting welding after the welding area is filled with protective gas, and performing front welding, back welding or front and back cover welding. The method can be used for penetration welding of stainless steel super-thick plates or backing welding of deep-groove and thick-truncated-edge super-thick plates, the welding efficiency can be remarkably improved, welding deformation is reduced, and the post-welding machining allowance of high-precision products is reduced.

The utility model relates to the technical field of pressing tools, in particular to a copper nozzle pressing tool which comprises a pressing tool body and a copper nozzle, a positioning seat is arranged on the pressing tool body, a copper nozzle positioning hole is formed in the positioning seat, connecting holes are further formed in the positioning seat at intervals, the copper nozzle positioning hole is matched with the copper nozzle in a clamped mode, and the copper nozzle positioning hole is matched with the copper nozzle in a clamped mode. A copper nozzle positioning hole is formed in the positioning seat, a gas circulation gap is further formed between the copper nozzle positioning hole and the copper nozzle, a dust suction channel and a protective gas channel are formed in the two opposite sides of the positioning seat correspondingly and are both obliquely arranged, and a protective gas inlet is formed between the protective gas channel and the gas circulation gap. A dust extraction opening is formed between the dust extraction channel and the gas circulation gap, and the protective gas inlet is lower than the dust extraction opening. According to the copper nozzle pressing tool, the mode that dust is directly extracted from the side face is adopted, it is guaranteed that the welding environment is free of impurities, black holes and explosion holes, an outlet of shielding gas is lower than a dust extraction opening, and the welding protection performance is guaranteed.

The invention discloses a laser welding method for dual-phase steel and aluminum alloy with a preset nanometer rare earth middle layer, and belongs to the field of dissimilar material laser welding. The laser welding method comprises the steps that to-be-welded parts of an aluminum alloy plate and a dual-phase steel plate are subjected to accurate grinding and cleaning; the preparation method comprises the following steps: uniformly mixing aluminum powder with nanoscale CeO2 powder, and adding acetone to obtain pasty Al-CeO2 powder; a groove is cut in the side, making contact with the dual-phase steel plate, of the aluminum alloy plate in the welding seam direction, and the groove is pre-coated with the pasty Al-CeO2 powder; a protective gas device is installed, and argon is used for welding protection; and fifthly, the aluminum alloy and dual-phase steel plate welding test piece is clamped to a universal welding clamp, and laser welding is conducted. According to the method, the problem that cracks are generated on the bonding surface in steel-aluminum welding and the problem that air holes are generated when rare earth oxide is added in steel-aluminum welding are solved, the size and the number of brittle intermetallic compounds at the interface are reduced, and the loading capacity of a steel-aluminum laser welding joint is improved.

The present invention provides a local dry underwater laser welding multi-shielding gas filler wire drainage device, comprising an adjustable straight pipe, a connecting module, a drainage cover, a nozzle, and a wire feeding pipe. The connecting module is provided with a welding shielding gas inlet hole; the connecting module, the adjustable straight pipe, and the nozzle are sequentially connected from top to bottom and jointly form a long straight through path; the welding shielding gas inlet hole is communicated with the long straight through path; the drainage cover is sleeved on the outer side of the adjustable straight pipe to form a drainage cavity having a downward opening; the drainage cover is provided with a drainage gas inlet hole, and the drainage gas inlet hole is communicated with the drainage cavity; a fixing channel is formed on one side of the drainage cover; the wire feeding pipe extends into the drainage cavity from the fixing channel; a third gap is formed between the inner wall of the fixing channel and the outer side of the wire feeding pipe; a welding wire shielding gas inlet hole is formed in the wall of the fixing channel; the welding wire shielding gas inlet hole is communicated with the drainage cavity by means of the third gap. The drainage device can satisfy the requirement of underwater filler wire laser welding, and relates to innovative use of welding wire shielding gas to ensure that welding wires are in a dry state, thereby effectively improving the quality of filler wire welding.

The invention relates to the technical field of silicon nitride material preparation, and in particular to a high thermal conductivity silicon nitride substrate debinding process. The invention comprises the following steps: firstly performing gradient heating debinding after vacuuming a debinding furnace, then charging a protective gas into the debinding furnace to make the pressure in the furnace reach 0.07-0.1Mpa, then sequentially performing ultra-high temperature treatment and temperature control and cooling treatment, and finally cooling the furnace to room temperature to obtain a silicon nitride green sheet; the gradient heating debinding comprises firstly heating the temperature to 150-200°C at 1-3°C / min and keeping the temperature for 0.5-1h, then heating the temperature to 300-350°C / min at 1-3°C / min and keeping the temperature for 1-2h, and finally heating the temperature to 550-600°C at 2-5°C / min and keeping the temperature for 1-2h; the ultra-high temperature treatment comprises heating the temperature to 1100-1150°C at 4-6°C / min and keeping the temperature for 2-6h; and the temperature control and cooling treatment comprises cooling the temperature to 150-200°C at 2-5°C / min. The present invention reduces the carbon atomic percentage of the silicon nitride green sheet to the greatest extent through the debinding process, thereby further improving the thermal conductivity of the silicon nitride substrate.

The invention discloses a gas saving device for welding shielding gas, and relates to the technical field of shielding gas saving, the gas saving device comprises gas saving equipment, a fluid pipeline and a control part are arranged in the gas saving equipment, the control part drives a baffle in the fluid pipeline to move through obtained seam width data so as to obtain the maximum flow of welding the seam width; according to the method, the maximum fluid flow during welding of the seam width is determined through the seam width, namely, targeted fluid flow adjustment can be conducted according to different welding seam widths, the purpose of preliminary gas saving is achieved, and meanwhile covering of protective gas can be guaranteed. And the rotating angle of the dynamic adjusting plate is adjusted according to the proportion, so that the flow is dynamically adjusted to further save gas. According to the real-time change of the welding current, the gas flow is intelligently controlled, and gas is supplied after being specially treated on the premise that the gas formula is not changed. And the gas consumption is effectively reduced while the welding quality is ensured.

The invention provides a coal mine hydraulic support gas shield welding wire with the strength higher than 900 MPa and a preparation method of the coal mine hydraulic support gas shield welding wire. The gas shield welding wire comprises, by mass, 0.03%-0.06% of C, 0.51%-0.70% of Si, 1.35%-1.64% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S, 0.20%-0.38% of Cr, 2.35%-2.65% of Ni, 0%-0.09% of Cu, 0.45%-0.70% of Mo, 0.015%-0.030% of Ti, 0.025%-0.035% of Nb, 0.002%-0.006% of Ce, 0.0005%-0.0012% of B, smaller than or equal to 0.004% of O, smaller than or equal to 0.006% of N and the balance Fe and The invention has the following beneficial effects: (1) through reasonable design of chemical components, the yield strength of weld metal is greater than or equal to 820 MPa, the tensile strength is greater than or equal to 900 MPa, the ductility is greater than or equal to 21%, and the low-temperature impact toughness at-40 DEG C is greater than or equal to 75 J; (2) inclusions in a weld joint are dispersed and refined after the welding wire is welded, refined acicular ferrite instead of bainite and martensite is taken as a main structure, and the strength and toughness of the weld joint are excellent; and (3) the composition proportion of the welding wire is optimized, a stable welding wire preparation process is developed according to the components, and the comprehensive performance of the high-strength coal mine hydraulic support welding seam is considered.

The invention belongs to the technical field of metal preparation, and particularly relates to a Fe-Al-Nb alloy and a preparation method thereof. Comprising the following steps: mixing ferric oxide, niobium pentoxide powder and a metal diluent, performing ball milling, and pressing into a green body; and the blank is put into a reaction kettle, then an ignition agent is added, protective gas is inflated, a self-propagating reaction is conducted at the temperature of 260-300 DEG C, and the Fe-Al-Nb alloy is obtained. The Fe-Al-Nb alloy is prepared through the self-propagating reaction, the reaction temperature is reduced, the thermal stress during forming is improved, the temperature of the self-propagating reaction is only 260-300 DEG C, meanwhile, the self-propagating reaction mode is adopted, the alloy is rapidly cooled after reacting, the fine grain strengthening effect is promoted to be more obvious, a microstructure of a Fe3Al matrix phase and a C14 Laves reinforced phase is formed, and the Fe-Al-Nb alloy is obtained. And the distribution of a reinforced phase is more uniform, and the wear resistance of the material is improved.

The invention discloses laser positioning / welding and laser cleaning synchronous integrated equipment and a laser positioning / welding and laser cleaning synchronous integrated method. The equipment realizes real-time positioning and automatic focusing based on welding seam tracking and optical signal processing, links two lasers to synchronously emit welding and cleaning light beams, acts on a welding pool at the same time, and is matched with shielding gas pre-injection, smoke discharge and slag removal and a special clamp to remove impurities in the welding pool in real time, generate micro-vibration stirring and promote grain refinement in the welding process. According to the equipment, key links such as workpiece clamping and positioning, automatic focusing, welding and cleaning are combined, the technological process is greatly simplified, and the compactness and the mechanical property of a welding seam of a plated part are improved.

A method inspects weld quality in-situ. The method obtains a plurality of sequenced images of an in-progress welding process and generates a multi-dimensional data input based on the plurality of sequenced images and / or one or more weld process control parameters. The parameters may include: (i) shield gas flow rate, temperature, and pressure; (ii) voltage, amperage, wire feed rate and temperature (if applicable); (iii) part preheat / inter-pass temperature; and (iv) part and weld torch relative velocity). The method generates defect probability and analytics information by applying one or more computer vision techniques on the multi-dimensional data input. The analytics information includes predictive insights on quality features of the in-progress welding process. The method then generates a 3-D visualization of one or more as-welded regions, based on the analytics information, and the plurality of sequenced images. The 3-D visualization displays the quality features for virtual inspection and / or for determining weld quality.

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 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 a handheld laser welding machine capable of preventing metal from splashing, and relates to the technical field of laser welding, the handheld laser welding machine comprises a nozzle fixed on a gun nozzle of a laser welding gun, a flow guide head used for shunting shielding gas is fixed in the nozzle, a plurality of flow changing plates are annularly distributed on the periphery of the nozzle, and the nozzle is sleeved with a flow adjusting assembly; the flow adjusting assembly comprises a flow guide cover arranged on the nozzle in a sleeving mode, and the flow guide cover moves in the axial direction of the nozzle. The protective gas is shunted through the flow guide head, and the shunted protective gas is blown to the lower end of the nozzle through the flow adjusting gas channel formed between the nozzle and the flow guide cover, so that the problems that splashing high-temperature metal particles make continuous contact with the outer wall of the nozzle, and the high-temperature metal particles and oxygen in an area not covered by the protective gas are subjected to composite reaction are solved; and a corrosive metal oxide deposition layer is formed, so that the outer wall material of the nozzle is subjected to oxidation peeling and thermal stress crack propagation, and the service life of the nozzle is shortened.

The invention discloses an electric arc additive manufacturing method for assisting in titanium alloy grain refinement through coaxial ultrasound. The method comprises the following steps that firstly, an ultrasonic gun is installed on a welding gun in the mode that the ultrasonic gun and a tungsten electrode are coaxial; 2, fully cleaning the surface of the titanium alloy substrate, clamping and fixing the titanium alloy substrate in a to-be-welded area, and adjusting the tip position of a tungsten electrode to the initial position of material increase; thirdly, welding shielding gas is introduced in advance, and after the electric arc is stable, layer-by-layer stacked additive manufacturing is carried out on the titanium alloy substrate through a coaxial ultrasonic auxiliary method; and fourthly, the titanium alloy component obtained after additive manufacturing is completed is cooled and then taken down from the clamp, and the additive manufacturing process is completed. According to the method, the ultrasonic waves are introduced into the electric arc and the molten pool, the electric arc form can be effectively controlled, the fluidity of the molten pool can be effectively improved, then grain size refinement and distribution uniformity of the titanium alloy additive manufacturing component are achieved, the titanium alloy additive manufacturing component is strengthened, the mechanical property of the titanium alloy additive manufacturing component is improved, and the method has very important significance on titanium alloy electric arc additive manufacturing.

The invention provides a blowing head and laser welding equipment, the blowing head comprises a body, the body is provided with a laser channel in a penetrating mode, the laser channel is provided with a light inlet end and a light outlet end, and a laser beam is transmitted to the light outlet end from the light inlet end; the protective glass is positioned on one side of the light inlet end; a blowing channel used for conveying protective gas into the laser channel is arranged on the side wall of the body in a penetrating mode. The end face, close to the light outlet end, of the body is provided with a spherical reflecting face which is concavely arranged towards the light inlet end, the spherical reflecting face and a space defined by a welded workpiece form a heat storage space, and the laser channel is communicated into the heat storage space. According to the method, the influence of protective gas on cooling of a welding spot area can be reduced, the laser absorption rate of a welded part is increased, and the welding depth and quality are guaranteed.

Provided are a gas-shielded metal arc welded joint of high-Mn steel, which is simple, has high strength and excellent extremely low-temperature toughness, and a method for producing the same. A gas-shielded metal arc-welded joint in which a welding metal is formed from a steel material of a high-Mn-content austenitic steel containing, in mass%, 18.0-30.0% of Mn using a shielding gas and a solid welding wire, the welding metal having a chemical composition containing, in mass%, 0.15-0.80% of C, 0.10-1.00% of Si, 17.0-30.0% of Mn, 0.030% or less of P, 0.030% or less of S, 0.001-0.100% of Al, 0.4-5.5% of Cr, 0.01-3.50% of Mo, 0.01-10.00% of Ni, and 0.0200-0.1500% of N, with the remainder being Fe and unavoidable impurities. Methods of making a gas shielded metal arc welded joint by incorporating a given concentration of nitrogen in a shielding gas, or increasing the N content of a solid wire.

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 laser spot welding machines, and provides a laser spot welding machine for mold machining, which comprises a workbench, a mounting frame is fixed on the rear side of the top wall of the workbench, a first electric sliding rail is fixed on the top wall of the mounting frame, a vertical plate is fixed on the top wall of a sliding block of the first electric sliding rail, and a second electric sliding rail is fixed on the side wall of the vertical plate. A cross beam is fixed to the side wall of a sliding block of the second electric sliding rail, a laser spot welding machine body is fixed to the front end of the cross beam, the outer side of a welding head of the laser spot welding machine body is sleeved with a protection cover, and the gas spraying and collecting assembly, the eye protection assembly, the translation lifting assembly and the purification assembly are arranged on the workbench. By means of the technical scheme, the problems that most welding equipment in the prior art does not integrate the protective gas injection function and the waste gas treatment function, the health of operators can be threatened, the environment can be possibly polluted, meanwhile, strong light, ultraviolet rays and infrared rays are generated during welding, and the operators are prone to visual damage in the welding process are solved.

The invention relates to high-vacuum high-power laser welding equipment, and belongs to the field of laser welding devices. High-vacuum high-power laser welding equipment comprises a welding box, a welding mechanism, a vacuum mechanism and a gas balance mechanism. A containing cavity used for containing a to-be-welded piece is formed in the welding box. The welding mechanism is used for providing a laser beam into the accommodating cavity to weld a to-be-welded part; the vacuum mechanism is communicated with the accommodating cavity and is used for driving gas to leave the accommodating cavity; the gas balance mechanism is used for providing protective gas into the containing cavity.