29 results about "Arc stability" patented technology

The invention relates to the technical field of material processing, and discloses a nitrogen content dynamic regulation and control process for variable polarity argon arc welding of high-nitrogen steel, which comprises the following steps: adjusting the proportion of nitrogen in shielding gas in real time based on a detection result of a flowing state of a molten pool; dynamically regulating and controlling the variable polarity switching frequency based on the arc stability detection signal; the gas supply delay time is adjusted based on the welding heat input change condition; and current waveform modulation parameters are synchronously optimized based on the penetration change so as to realize uniform distribution of nitrogen elements. According to the nitrogen content dynamic regulation and control process for variable-polarity argon arc welding of the high-nitrogen steel, the nitrogen element requirements of different areas of a molten pool can be accurately matched, and the problem that the local nitrogen content is too high or too low due to uneven convection of the molten pool is solved; meanwhile, current waveform modulation parameters are optimized in combination with fusion depth changes, the solubility stability of nitrogen elements in key areas such as the root of the weld joint can be ensured, the problems that the nitrogen content distribution is not uniform and the solubility of the root fluctuates are solved on the whole, and the nitrogen content of each area of the weld joint is closer to a design value.

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 discloses an electric arc characteristic-based alloy material electric contact performance electrical test method, which comprises the following steps of: providing basic information for a high-voltage rotating arc diffusion arc and intermediate-frequency large-current breaking simulation test by acquiring contact data of a circuit breaker, and triggering a controllable rotating arc or diffusion arc between contacts by utilizing an alternating-current high-voltage small-current system, so that the contact performance of the high-voltage rotating arc and the intermediate-frequency large-current breaking simulation test is realized. An intermediate-frequency low-voltage large-current system is used for simulating the on-off working condition of an intermediate-frequency circuit breaker, electrical performance data and ablation damage information of a contact under the action of an intermediate-frequency arc are collected, weighted calculation is carried out on the arc temperature, the electrical performance and an ablation index, and a comprehensive electrical contact performance index is generated; the performance of the alloy contact under different working conditions is comprehensively evaluated, the electric contact performance test of the alloy material is realized, and the test accuracy is improved.

The invention belongs to the field of aeronautical material manufacturing, and relates to a method for eliminating arc striking of a crucible wall in the titanium alloy VAR smelting process and application. According to the method, the arc striking phenomenon of the crucible wall in the VAR smelting process of the high-Cl-content titanium sponge is completely eliminated by preventing the high-Cl-content titanium sponge, the consumable electrode and the electrode block from absorbing moisture and adopting multi-row fast extraction degassing and short-arc smelting in the VAR smelting process; specifically, through electrode block structure optimization and technological parameter cooperation, closed-loop control is formed from multiple dimensions of gas generation, gas discharge, arc stability and the like, and the limitation that a traditional method only depends on a single technology is solved; furthermore, moisture absorption prevention control reduces moisture introduction from the source, low forevacuum control strengthens gas discharge in the smelting process, and double control greatly reduces the splashing risk; furthermore, differentiated parameters are formulated for key areas such as welding seams, and the process stability is ensured through quantitative control.

The present application provides a kind of coating stainless steel welding wire and its preparation method, it is related to welding material field, including welding wire matrix and coating, the coating is coated on the outer surface of the welding wire matrix, by the total mass of the coating, the coating includes the following mass percent of raw materials: base oil 70~85%, molybdenum disulfide 2~5%, graphene 0.5~1%, monocrystalline silicon powder 1.5~3%, potassium borate 10~20%, nano titanium dioxide 0.5~1%.The present application provides a kind of coating stainless steel welding wire and its preparation method, the potassium borate in coating, nano titanium dioxide can improve the arc stability in the welding process, reduce the spatter rate;Molybdenum disulfide, graphene can increase the conductivity of welding wire while also can significantly improve the stability of welding wire feeding;Monocrystalline silicon powder can improve the forming state of weld, the final finished product coating stainless steel welding wire has good wire feeding stability, surface coating uniform and dense, arc stable, welding spatter is small, and the weld forming is good.

The invention provides a welding rod for nickel-chromium-cobalt-molybdenum high-temperature alloy welding and a preparation method of the welding rod, and relates to the technical field of welding materials. The welding rod for nickel-chromium-cobalt-molybdenum high-temperature alloy welding comprises a core wire and a coating, and the coating comprises, by mass, 22%-30% of rutile, 29%-38% of marble, 3.5%-5.0% of fluorite, 18%-24% of cryolite, 3.5%-5.0% of potassium titanate, 0.8%-1.5% of cobalt powder, 0.8%-1.5% of molybdenum powder, 1.5%-3.0% of ferroniobium, 0.8%-1.5% of manganese metal, 0.8%-1.5% of reduced iron powder, 0.4%-1.0% of sodium alginate, 0.8%-1.5% of sodium carbonate and 0.4%-1.0% of CMC. When the welding rod is used for carrying out submerged arc horizontal position welding on the nickel-chromium-cobalt-molybdenum high-temperature alloy, the electric arc stability is good, deslagging is good, forming is attractive, deslagging is easy, deposited metal components are stable, and the mechanical property is excellent.

The invention relates to the technical field of welding, and discloses an alkaline welding material with high arc stability and high impact absorbing energy and a preparation method thereof. The alkaline welding material comprises a steel core and composite mineral powder, and the composite mineral powder is pressed on the surface of the steel core through a binder. Or the alkaline welding material comprises a low-carbon steel skin and composite mineral powder, and the composite mineral powder is wrapped by the low-carbon steel skin through mechanical rolling; the composite mineral powder comprises, by mass, 30-35 parts of marble, 1.5-10 parts of calcium aluminate, 20-28.5 parts of fluorite, 1-2 parts of synthetic mica, 15-20 parts of iron powder, 5-7 parts of atomized ferrosilicon, 3-5 parts of medium carbon ferromanganese, 4-5 parts of ferrotitanium, 1-2 parts of titanium dioxide and 1-2 parts of sodium carbonate. The obtained alkaline welding material can reduce the melting point of slag, refine grains, improve the cleanliness of molten steel, reduce the fluoride content and ionization energy in the coating, and improve the impact absorbing energy and the arc length of the welding material.

The application discloses a kind of MIG welding control method and welding machine, control method includes: in every droplet transition period, add arc breaking stage, make every droplet transition period include short circuit stage, arc stage and arc breaking stage;Wherein, in every droplet transition period, add arc breaking stage includes: in response to the preset time after arc stage of arc current output, switch to PWM control, in PWM control stage, arc is extinguished, to enter to arc breaking stage;In response to the output of no-load voltage after PWM control ends, and carry out short circuit detection.The application adds arc breaking stage on the basis of short circuit stage and arc stage, and arc breaking stage is realized by PWM control, effectively avoid the occurrence of droplet repulsion transition and droplet drop difficult phenomenon, to reduce welding spatter and improve arc stability, improve welding quality.

The adjustable carbon dioxide protection welding contact tube comprises a contact tube body, a threaded column is fixedly connected to the outer portion of the contact tube body, through holes are formed in the threaded column and the contact tube body in a penetrating mode, a first penetrating opening is formed in one end of the contact tube body, and a second penetrating opening is formed in the other end of the contact tube body. One end of the contact tube body is divided into two sheet-shaped structures, in the embodiment, as long as abrasion exists, pliers are taken, the two sides of the contact tube body are clamped to be close to each other and bent oppositely, and a welding wire is clamped again, after clamping is adjusted, the contact tube can be repeatedly used, and various types of manual welding or robot welding can be achieved. The contact tube can be applied to welding wires of various types and thicknesses, the tail end is in tight contact, point arc stability can be guaranteed, contact points are not changed, the contact tube body can be continuously used, and waste of resources is avoided.

The application belongs to the technical field of intelligent control of smelting furnaces, in particular to an intelligent smelting furnace for titanium alloy heating, comprising a data acquisition module, an arc stability determination module, a position adjustment control module and a feedback adjustment module. The arc stability determination module combines arc voltage and current double parameters, and is based on the design of dynamic adjustment of voltage and current variation coefficient weight based on electrode consumption, which is suitable for the change of current fluctuation sensitivity after the adaptation of electrode consumption, realizes real-time and accurate quantitative evaluation of arc stability, can timely and accurately identify abnormal state of consumable electrode, generates an adjustment vector containing height and transverse displacement through molten pool shape characteristics and arc deviation characteristics, avoids smelting defects such as molten pool turmoil, local overheating and composition segregation caused by insufficient adjustment pertinence, and finally dynamically optimizes weight distribution and adjustment coefficient through a feedback mechanism, which significantly improves the arc stability control and adjustment accuracy.

This invention belongs to the field of intelligent control and big data processing technology, specifically relating to a power intelligent control and management method and system based on handheld welding equipment. The method includes: real-time acquisition of arc physical state signals, welding torch operation posture signals, and material interface feature signals of the workpiece during the welding process using multimodal sensors; millisecond-level time-series modeling of the arc physical state signals to extract dynamic indicators of arc stability; spatial motion trajectory analysis of the welding torch operation posture signals to generate dynamic features of the welding torch posture; and joint frequency and spatial domain analysis of the material interface feature signals to identify the type of dissimilar metal interface region where the current welding point is located. This system, by integrating a multimodal millisecond-level sensing system of arc spectrum, welding torch posture, and material interface, achieves real-time, accurate, and comprehensive characterization of the welding conditions.

A dry cell-based arc lighter, relating to the technical field of lighters, and comprising: a power supply circuit; a boost module; a power supply management module, wherein an output end of the power supply management module is connected in parallel to an energy storage capacitor, the power supply management module charges the energy storage capacitor electrically connected to the power supply management module, and the energy storage capacitor serves as an operating voltage; a switch module, comprising sequential input of a first signal and a second signal; a main control module, configured to output a stop signal to the boost module on the basis of the first signal inputted from the switch module, and to output an ignition signal to an arc driving module on the basis of the second signal inputted from the switch module; and the arc driving module, electrically connected to a high-voltage generator, and configured to drive the high-voltage generator to generate an arc on the basis of the ignition signal outputted by the main control module. The boost module and the power management module are used to step up the output voltage of a dry cell and supply power to the energy storage capacitor, so that the energy storage capacitor serves as an operating voltage, thereby effectively ensuring arc stability and improving the performance of the dry cell-based arc lighter.

The invention discloses a duplex stainless steel electric arc additive manufacturing method, and relates to the technical field of metal material additive manufacturing, and the duplex stainless steel electric arc additive manufacturing method comprises the following steps that an immersion type water tank is provided, and the water tank is filled with a cooling medium; an additive manufacturing substrate is fixed to a lifting platform in the water tank, and the substrate is immersed below the liquid level; carrying out cladding deposition on the substrate immersed in the cooling medium by adopting an electric arc heat source in a protective atmosphere, and stacking layer by layer to form a component; wherein in the cladding deposition process, an external magnetic field is applied to a molten pool area, and the magnetic line direction of the external magnetic field is basically perpendicular to the welding advancing direction. According to the method, magnetic field control and a water cooling system are deeply fused, on the premise that the electric arc stability is guaranteed, the structure controllability, the structure compactness and the service reliability of the duplex stainless steel WAAM technology are systematically improved, and the method has obvious academic innovation and also has good engineering practical value and popularization prospects.

The invention provides a welding flux for nickel-based alloy submerged arc horizontal position welding and a preparation method of the welding flux, and relates to the technical field of welding materials. According to the total mass of the flux, the flux comprises, by mass, 19%-28% of fluorite, 9%-13% of wollastonite, 25%-35% of magnesia, 21%-30% of bauxite, 1%-5% of silica powder, 1%-4% of nickel-magnesium alloy, 1%-5% of potassium fluoroaluminate and 3%-11% of dolomite. The combined welding wire and welding flux is matched with an ERNiCrMo-4 nickel-based welding wire to carry out submerged arc horizontal position welding on a nickel-based alloy plate, the electric arc stability is good, deslagging is good, forming is attractive, deslagging is easy, deposited metal components are stable, and the mechanical property is excellent.

A method for monitoring the operation of an electric arc furnace, operation during which a first load of material to be melted is charged in the electric arc furnace, the method comprising: acquiring: o an arc stability signal (Stb), representative of the stability or instability of an electric arc present in the electric arc furnace, o one or more thermal losses signals (Tin, Tout, CWF), relative to thermal losses (TL) of the electric arc furnace, determining a recharging readiness signal (RR), which specifies whether the electric arc furnace is in condition for charging a second load of material to be melted, or not, the recharging readiness signal being determined based on the arc stability signal and on the one or more thermal losses signals, emitting the recharging readiness signal.

This invention discloses a method for identifying arc stability components based on a rotating arc stability sensor. Utilizing the working principle of the rotating arc stability sensor, a comprehensive evaluation index of arc stability can be detected. This sensor takes arc stability as input, an arc length self-adjustment system as the sensing element, a rotating arc as the conversion element, a welding circuit as the conversion circuit, a data acquisition and processing system as the output unit, and a rotating arc sensing signal as the output. Arc stability is classified and its evaluation index is established, dividing it into three components and quantifying the magnitude of each component. The method for identifying these three arc stability components allows for the determination of their magnitudes. This invention enables robots to automatically identify the arc stability components, laying the foundation for online control of arc stability and welding quality, and improving the quality and efficiency of robot welding.

The invention relates to a pole piece processing device and a battery production system. The pole piece processing device comprises a pole piece transferring mechanism, a discharging mechanism, an electric arc restraining cover and a negative pressure mechanism, wherein the pole piece transferring mechanism is used for conveying a pole piece to be processed along a first direction; the discharging mechanism comprises a high-voltage generator and a discharging body which are electrically connected; the discharge body is arranged on one side of the pole piece along the second direction and is provided with a discharge tip part, and the discharge tip part is arranged towards the edge of the pole piece. The electric arc restraining cover at least covers the discharging tip part, and the electric arc restraining cover is provided with a receding opening for the electric arc of the discharging tip part to pass through. The negative pressure mechanism is configured to generate negative pressure in the arc restraining cover. The electric arc constraint cover is used for constraining the electric arc emitted by the discharge tip part, the problem of electric arc deviation caused by movement of the pole piece is relieved, the negative pressure mechanism is arranged to apply suction force to the electric arc, forward deviation of the electric arc is further reduced, the stability of the electric arc is improved, and the electric arc can stably burn burrs.

This invention relates to the field of metallurgical control technology, and more particularly to a method and system for electrode feed control in a ferroalloy electric arc furnace. The method includes: acquiring the operating parameters of the ferroalloy electric arc furnace; calculating the ideal arc length corresponding to each phase electrode based on the operating parameters, and determining the initial target feed amount for each phase electrode based on the difference between the ideal arc length and the current arc length; performing arc stability analysis on the current and voltage values ​​of each phase electrode, and generating electrode position compensation amounts for each phase motor to suppress arc fluctuations; performing power balance optimization calculations based on the initial target feed amount, electrode position compensation amounts, and pre-acquired three-phase power imbalance, and generating independent feed control commands to drive the action of each phase electrode; and executing each independent feed control command to adjust the feed position of the corresponding electrode. This invention can comprehensively respond to multi-dimensional operating parameters and achieve multi-objective synergistic optimization of arc stability, power balance, and electrode loss.

This invention discloses a low-hydrogen flux-cored welding wire based on two-dimensional MXene surface self-assembly modification, its preparation method, and its application, belonging to the field of welding materials technology. The low-hydrogen flux-cored welding wire comprises a steel strip outer sheath and a flux core filled within it, the flux core being composed of metal alloy powder and modified composite flux core powder. Its preparation method includes: preparing a two-dimensional MXene colloidal dispersion using a chemical etching method; cationically modifying the insulating slag-forming powder; mixing the two and electrostatically self-assembling and coating them; after drying, mixing with the metal alloy powder; filling the steel strip; and rolling and drawing into shape. This invention constructs a three-dimensional continuous conductive network within the flux core through the MXene layer, improving arc stability; simultaneously, the MXene shell forms a physically water-blocking labyrinth, endowing the welding wire with ultra-low hydrogen characteristics; the active titanium released by the decomposition of MXene at high welding temperatures can refine the weld grains and improve mechanical properties. This welding wire can be widely used in automated gas-shielded welding processes for high-strength steel.

The present application relates to the technical field of metal smelting, and discloses an intelligent control method, device and system for a holder of an ore smelting furnace, the method comprising: obtaining operating parameters of the holder of the ore smelting furnace; performing three-dimensional quantitative evaluation of arc stability of the holder of the ore smelting furnace according to the operating parameters to determine current arc stability of the holder of the ore smelting furnace; determining a target position adjustment amount and a target pressure release amount of an electrode held by the holder of the ore smelting furnace according to the current arc stability; adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure release of the electrode according to the target pressure release amount. The present application can realize accurate control, intelligent decision-making and efficient operation and maintenance of the holder through multi-dimensional comprehensive analysis by the intelligent control system, thereby effectively improving the overall operating performance of the ore smelting furnace and meeting the needs of modern industrial production for high efficiency, energy saving and stable production.

The invention discloses a multi-axis linkage multi-layer multi-channel variable cross-section welding seam self-adaptive welding mechanism and method, the mechanism comprises a mechanical arm ground rail mechanism, and a welding mechanical arm system is connected to the mechanical arm ground rail mechanism; the positioner system is arranged on one side of the mechanical arm ground rail mechanism and is axially parallel to the mechanical arm ground rail mechanism, and the positioner system is used for fixing a workpiece to be welded; the centralized control cabinet is electrically connected with the mechanical arm system, the mechanical arm ground rail mechanism and the positioner system, and the centralized control cabinet is used for presetting welding parameters; when the to-be-welded workpiece is fixed to the positioner system, the welding mechanical arm system moves in the full length direction of the mechanical arm ground rail mechanism based on the preset welding parameters to weld multiple variable-cross-section weld joints on the to-be-welded workpiece, the process execution difficulty of the space weld joints is reduced, and the welding efficiency is improved. And the arc stability and the molten pool forming consistency are improved, and finally automatic welding with high efficiency, high flexibility and high first-pass yield of the full-length variable cross-section welding seam of the long workpiece is achieved.

The invention relates to a TIG (Tungsten Inert Gas) automatic welding pulse phase control method based on time sequence molten pool recognition. A dynamic image of the molten pool is obtained through a high-speed visual sensor, and multi-dimensional feature quantization of the front edge curvature, the rear edge liquid-solid interface gradient, the center gray scale standard deviation and the like of the molten pool is achieved in combination with self-adaptive filtering and feature extraction. A lightweight CNN-LSTM hybrid network is utilized to output a normalized base metal melting index, a molten pool expansion rate and a fillable confidence coefficient in real time, and then a continuous molten pool dynamic phase angle is generated based on an arc tangent function model. After the phase angle and the current phase offset are mapped, FPGA hardware double buffering processing is carried out, microsecond pulse current phase adjustment is achieved, and the arc stability is improved through an S-shaped acceleration limiting measure. According to the scheme, the molten pool state sensing precision and the welding process control real-time performance are effectively improved, and collaborative optimization of welding stability and filling adaptability is achieved.

The application discloses a gas shield solid wire rod and welding wire for improving full-position welding arc stability, which contains Fe and inevitable impurity elements, and the following chemical elements with mass percentage: C: 0.05-0.12%; Si: 0.7-1.4%; Mn: 1.0-1.9%; S: 0.008-0.02%; Ti: 0.08-0.19%; Al: 0.01-0.08%; Zr: 0.01-0.06%; Ni: 0.1-0.8%; Mo: 0.09-0.25%; Y: 0.02-0.07%; O: 0.003-0.008%. The welding wire can realize uniform distribution and spreading of the bead surface layer slag to both sides of the weld and self-stripping after welding, and avoids the problem of arc instability caused by a large amount of slag gathering in the center of the weld.

The application discloses a welding control method and a welding machine, and relates to the technical field of welding. The welding control method comprises a plurality of molten drop transition periods, each molten drop transition period comprises a short circuit stage and an arc burning stage, and the control method comprises the following steps: adding an arc breaking stage in each molten drop transition period, so that each molten drop transition period comprises the short circuit stage, the arc burning stage and the arc breaking stage; wherein adding the arc breaking stage in each molten drop transition period comprises the following steps: outputting a base value current after the arc burning current output of the arc burning stage is ended; adjusting a current instruction to make the arc extinguish when the current instruction reaches the base value current, so as to enter the arc breaking stage; in the arc breaking stage, the welding wire is in a forward wire feeding state, and detection of the short circuit stage is carried out. The application effectively avoids the occurrence of phenomena such as molten drop repulsion transition and molten drop falling difficulty by adding the arc breaking stage, so that welding spatter is reduced, arc stability is improved, and welding quality is improved.

The present application relates to the technical field of flux, in particular to a calcium silicate type smelting flux, a preparation method and application thereof. The calcium silicate type smelting flux is composed of the following components in percentage by mass: CaF2 13%~25% and CaSiO3 75%~87%. The calcium silicate type smelting flux is composed of CaSiO3 and CaF2 in a specific ratio, and the two components synergize with each other. On the one hand, the content of oxygen in the weld after welding tends to be rationalized, so that the weld has good low-temperature toughness and deslagging performance, has excellent arc stability and weld formability, the welding process is stable, the weld metal composition and structure are uniform, the surface appearance is good, and there are no defects such as pores and cracks, so as to ensure that the weld has excellent mechanical properties. On the other hand, the content of P element in the weld after welding can be significantly reduced, so as to ensure that the weld has good mechanical properties, and in particular, the low-temperature impact toughness of the welded joint after welding is good.

The embodiment of the invention discloses a control method, a control device and a control system of a direct-current gas shielded welding machine, and belongs to the technical field of inverter welding power arc control. The control method of the direct-current gas shielded welding machine comprises the steps that first electrical parameters of the last first short-circuit transition stage and the last first arcing stage are obtained; and when the first electrical parameter meets a first preset condition, after the last first arcing stage, a control device of the direct-current gas shielded welding machine is controlled to stop outputting power within first preset time. The arc stability and the welding seam quality of secondary arcing can be improved.

This invention provides a single-gun dual-tungsten inert gas (TIG) welding method and system for thick titanium alloys with narrow gaps. The single-gun dual-tungsten inert gas (TIG) welding method includes the following steps: S1, blunt edge design and processing; S2, cleaning the titanium alloy welding test plate, adjusting the assembly spacing of the titanium alloy welding test plate, and arranging it along the welding axis; setting the integrated dual-tungsten inert gas welding gun shaft and rotating it to the flat welding position; S3, teaching the titanium alloy welding test plate; S4, performing root pass welding on the taught titanium alloy welding test plate; S5, performing fill pass welding on the titanium alloy welding test plate after root pass welding; S6, performing cap pass welding on the titanium alloy welding test plate after fill pass welding. The single-gun dual-tungsten inert gas (TIG) welding method of this invention, with steps S1 to S6 being interconnected and inseparable, improves: 1. the stability of the dual-tungsten inert gas coupled arc, improves the quality of the weld joint, and solves the problem of incomplete fusion of the inner sidewalls in narrow gaps; 2. significantly improves the welding cladding rate.

The application discloses a kind of drawing wire welding control method, device, system and welding equipment in intelligent welding technical field, to solve the fixed positive wire feeding and negative wire drawing speed in prior art, it is difficult to adapt to the dynamic change under different welding conditions, so as to cause arc length consistency and droplet transfer period consistency to be poor, and then cause arc stability to be poor.It includes obtaining the duration of droplet transfer period and short circuit stage;The droplet transfer period is compared with the preset period, and the transition slope between the negative back-pulling speed and the positive wire feeding speed is adjusted according to the comparison result, so that the droplet transfer period approaches the preset period;The duration of short circuit stage is compared with the preset short circuit time to control the arc length consistency;The application accurately controls wire feeding and wire drawing action to realize accurate control of droplet transfer, thereby improving welding quality and reducing spatter.