652 results about "Shielding gas" patented technology

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 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 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 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 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 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.

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 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 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 provides a handheld laser-electric arc double-heat-source welding gun and a control method thereof. The handheld laser-electric arc double-heat-source welding gun is composed of a handheld component, a light beam control component, a focusing transmission sleeve and an electric arc welding gun sleeve. A laser optical fiber and an argon arc welding water electric pipe are input through a handheld part, and the handheld part is cooled through cooling water and a protective gas channel in the handheld part; starting and stopping of the laser and electric arc double heat sources are synchronously controlled through a starting switch on the side face of the handheld component. A swing motor in the light beam control part is used for driving a reflecting mirror to reflect a laser beam to a focusing transmission sleeve, and the laser beam is focused by a focusing lens and then acts on a workpiece; the state of an electric arc welding straight copper pipe in the electric arc welding gun sleeve is adjusted, and the positions and angles of an electric arc welding gun head and a laser welding gun head are changed; through the water and electricity pipe, the protective gas pipe and the water return pipe, electric power supply, protective gas conveying and cooling circulation of electric arc welding are achieved; the method is used for achieving high-quality welding of medium and thick plates made of different materials.

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 discloses an inner protective gas pressure control system and method for stainless steel pipeline welding, and relates to the technical field of welding process.The inner protective gas pressure control system comprises a data collection module used for collecting the welding angle, the welding time, the weld reinforcement and real-time air pressure parameters in the welding process; the historical modeling module is used for receiving and analyzing the welding process parameter data from the data collection module; the gas regulation control module is used for calling the gas pressure prediction model output by the historical modeling module and the collected current welding state data in real time; the feedforward and feedback fusion control module is used for outputting a disturbance prediction compensation value according to the target air pressure value; the fuzzy control module is used for generating a control correction signal for assisting air pressure adjustment; the self-learning optimization module is used for adjusting fitting parameters, disturbance evaluation strategies and fuzzy rule weights in the historical modeling module; according to the method, disturbance prediction correction can be carried out according to the welding angle change trend and the weld reinforcement error in the welding process.

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 laser welding, in particular to a thin-wall aluminum alloy butt joint laser pulse welding method which comprises the following steps of part pretreatment, part assembly, back shielding gas filling, welding parameter adjustment and welding, and inspection and treatment after welding. The energy density of 100-150J / mm is taken as a target reference, the peak duration is reversely limited to be within 8-12ms, and the corresponding peak power is matched, so that the energy of laser pulse acting on a welding area is concentrated and is not overloaded, the burn-through defect caused by too high local temperature of the thin-wall aluminum alloy is avoided, the welding seam forming integrity is guaranteed, and the cold crack problem is solved. According to the method, the basic value power is increased to 600-800 W, meanwhile, the pulse frequency is adjusted to 50-80 Hz, the continuous heat preservation effect is provided for the molten pool by increasing the basic value power, the pulse interval is shortened in cooperation with the high pulse frequency, the cooling speed of the molten pool is slowed down, thermal stress accumulation is reduced, the cold crack generation probability can be greatly reduced, and the mechanical stability of a connector is improved.

A GH3044 high-temperature alloy laser welding method belongs to the field of laser welding technology and is suitable for welding thin-walled overlap structures. It can further improve the welding strength of the weld spot and achieve single-sided welding and double-sided forming. The method includes the following steps: sequentially pickling, alcohol cleaning, and drying the surface of the high-temperature alloy to be welded; fixing the high-temperature alloy to be welded on a laser welding turntable to control the welding gap; adjusting the height of the shielding gas and the inclination angle with the weld interface; programming to confirm the welding path, welding starting point, and preheating and slow cooling time; isolating the front and back surfaces of the workpiece to be welded from the air through inert gas during welding; and using a pulsed welding laser to weld the joint to be welded. The present invention adopts a laser pulse slow cooling welding method to overcome defects such as cracks, pores, and surface depressions in high-temperature alloy laser welded joints, and can effectively improve the reliability of high-temperature alloy laser welded joints.

A shielding gas supply device and a method include a first nozzle that jets first shielding gas along a shield surface at a first velocity set in advance, and a second nozzle that is disposed on an outer side of the first nozzle and jets second shielding gas along the first shielding gas at a second velocity lower than the first velocity.

The invention discloses a high-voltage direct-current contactor sealing process and a high-voltage direct-current contactor, and the sealing process comprises the following steps: providing a ceramic assembly, a magnetic conductive plate, an iron core sleeve and a sealing sheet, carrying out the laser welding after the assembly to form a preliminary sealing assembly, and transferring the preliminary sealing assembly into sealing equipment; placing the sealing piece at the gas path through hole in the ceramic assembly or the magnetic conductive plate, and enabling the integrated connector to be attached to the peripheral area of the gas path through hole; the vacuumizing device vacuumizes the sealed cavity through the multi-way pipe fitting, and after the vacuum degree reaches the preset requirement, the vacuumizing device is closed; the inflating device is used for inflating protective gas into the sealed cavity through the multi-way pipe fitting; after air inflation is completed, the air inflation device is closed; the electric resistance welding device pushes the sealing piece to abut against the ceramic assembly or the magnetic conductive plate through the electric resistance welding connector and adopts the electric resistance welding technology to weld the sealing piece so as to completely seal the gas circuit through hole. The production efficiency can be improved, the cost and the product leakage rate are reduced, and the long-term sealing performance is improved.

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.

The application provides an austenitic welding wire suitable for high-strength steel structure and a welding method, and belongs to the technical field of welding.The application adopts a multi-element protective gas, wherein the multi-element protective gas comprises Ar 43-50%, He 43-50%, N2 2-7% and O2 0-2% in terms of volume content, and Ar+He is greater than or equal to 93%; wherein Ar can effectively isolate air, He can shrink the electric arc, improve the electric arc temperature, N2 can improve the electric arc stiffness, supplement the N element loss of the weld, ensure the strength and toughness of the weld, and O2 can improve the electric arc stability. The multi-element protective gas can improve the forming condition of the austenitic welding material in the gas shielded arc welding, reduce welding defects and improve the strength and toughness of the weld by mixing in different proportions. The application can improve the proportion and size of the strengthening phase by controlling the composition of the welding wire, and further improve the strength and toughness of the weld.

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 equipment and a method for feeding easily oxidized alloy in a tundish into molten steel directly through a screw rod, belongs to the technical field of metal smelting, and solves the technical problem that materials do not make contact with a slag layer in the process of adding special alloy into the tundish. The feeding auger penetrates through the high-temperature-resistant feeding pipe in the vertical direction; alloy easy to oxidize stored in the hopper is fed into the high-temperature-resistant feeding pipe from the feeding port through the feeding auger, an air inlet is formed in the position, located above the surface of the slag layer, of the lower portion of the side wall of the high-temperature-resistant feeding pipe, the air inlet is communicated with a shielding gas pump station through an air pipe, and shielding gas is blown into the high-temperature-resistant feeding pipe from the air inlet. And the protective gas is discharged through the feeding auger and the feeding auger in sequence, that is, the flowing direction of the protective gas is opposite to the feeding direction of the easily oxidized alloy. Due to the fact that the system is protected by the protective atmosphere in the feeding process and is prevented from making contact with a slag layer in the feeding process, materials can be effectively prevented from being oxidized, and the yield of the materials is increased.

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 discloses high-quality and high-efficiency ultrafast laser cleaning drilling auxiliary equipment and a using method thereof, and relates to the ultrafast laser cleaning drilling auxiliary equipment and the using method thereof. The invention aims to solve the technical problems that the economy of the production process cannot be considered while the high quality of a final processing surface is ensured by single shielding gas during current ultrafast laser processing, and the efficiency of a traditional non-integrated external dust removal mode is low. Negative pressure is formed in the sleeve, smoke dust, chippings and plasmas generated by laser processing are directly pumped away from a generation source before diffusion, the cleanliness of a processing environment is guaranteed, the service life of an optical element is prolonged, and the product yield is increased; in addition, through the height-adjustable sleeve, an operator can flexibly optimize the distance between a suction opening of the sleeve and the surface of the workpiece according to the thickness, the type and the process requirements of specific machining materials, so that the optimal suction effect and the optimal gas protection effect are obtained, and the adaptability of the device to various machining scenes is enhanced.

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 invention discloses an intelligent gas throttling control device for welding operation, and relates to the technical field of intelligent gas throttling control devices for welding operation, the intelligent gas throttling control device comprises a base, a filter hollow column and a filter screen assembly, the filter hollow column is mounted above the base, and a top plate is mounted above the filter hollow column through a flange connecting assembly; a positioning column is mounted at the inner bottom of the filter hollow column, and a connecting plate is mounted above the filter screen assembly; and a ball screw is mounted at the inner bottom of the filtering hollow column through a bearing seat. According to the intelligent gas throttling control device for welding operation, the gas pressure detection pipe in the filtering hollow column monitors the gas pressure on the two sides of the filtering net assembly in real time, the blocking degree is visually reflected through the liquid level difference of colored liquid in the U-shaped pipe, and the problem that a traditional device depends on experience to judge the cleaning time is solved; insufficient protective gas flow caused by blockage of the filter screen is prevented, and an effective protective layer is ensured to be formed in a welding area.

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.