1806 results about "Arc welding" patented technology

The invention discloses an electric arc dynamic self-adaptive control method and sensing system based on multi-modal sensing, and relates to the technical field of electric arc control. A multi-modal sensor integrated on a welding gun is used for synchronously collecting an electric arc form image, a molten pool area image, a molten pool oscillation sound signal and current and voltage multi-dimensional data; the collected data are preprocessed, and real-time parameters in the welding process are extracted; calculating and outputting an optimal welding control parameter in real time by combining a depth Q model and taking the welding quality as an optimization target; the control parameters are transmitted to a welding actuator, real-time adjustment of the welding process is completed, and real-time control over the welding arc is achieved; the control method can be used for enhancing the real-time self-adaption of a welding control system to complex welding components and the flexible manufacturing capacity of replacing a product line; the technical problems that in an existing automatic electric arc welding control method, electric arc welding information collection is single, control response is delayed, the flexible degree is low, and welding feature extraction errors are large are solved.

The invention discloses an automatic welding device for a rotary alloy furnace tube, and belongs to the technical field of arc welding equipment.The automatic welding device for the rotary alloy furnace tube comprises a base and a U-shaped bin located at the top of the base, and the two ends of the interior of the U-shaped bin are jointly provided with a centering clamping mechanism used for clamping the outer side of the furnace tube; a driving mechanism for providing power for the centering clamping mechanism to clamp the furnace tube is arranged on the outer side of the centering clamping mechanism, and a welding mechanism is arranged on the inner top of the U-shaped bin. A local sealing design is adopted for the inflation mechanism, the annular air bag is attached to the inner wall of the furnace tube after being inflated, an independent cavity communicated with the outside only through a welding seam gap is formed near the welding seam, the protection requirement can be met only by filling the local space with argon, the whole furnace tube or a large-range external space does not need to be filled, and compared with traditional overall argon filling, the argon filling efficiency is greatly improved. The argon consumption is greatly reduced, the industrial gas purchase cost is remarkably reduced, and the production cost investment is reduced.

The present invention relates to the technical field of screw welding processing, and discloses an automatic arc welding machine for processing countersunk small self-drilling cement screws, including an operating platform and a manipulator for taking screws, and a welding gun for welding screws and plates, a shell is installed on the upper side of the operating platform, a support frame for transmitting screws is installed inside the shell, first grooves for placing screws are symmetrically opened on both sides of the support frame, a movable frame for progressive screws is movably installed between the operating platforms, a driving motor for driving the movable frame to move is installed on the side wall of the support frame, a support table is installed on the upper side of the operating platform, a detection head for checking the alignment of the screws is installed on the side of the support table, and a conversion seat for adjusting the alignment of the screws is installed on the upper side of the operating platform. After the manipulator takes the screws and docks them with the metal plate, a welding gun is used to weld them, thereby realizing automatic welding, reducing labor costs, and improving production efficiency and welding quality.

The electric arc welding robot for automobile part machining comprises a platform, a transfer trolley used for bearing parts is arranged on the front side of the platform, welding parts are supported on the top of the transfer trolley, an electric arc welding machine base is fixedly connected to the top of the platform, a first mechanical arm is installed on the surface of the electric arc welding machine base, and a second mechanical arm is installed on the surface of the first mechanical arm. A second mechanical arm is installed at the end, away from the electric arc welding machine base, of the first mechanical arm, and a welding module is installed at the end, away from the first mechanical arm, of the second mechanical arm. By arranging the positioning structure, welding parts can be rapidly extruded and fixed, and the problems that an existing welding robot clamp is single in structure, low in clamping efficiency, tedious in operation and high in equipment complexity and maintenance difficulty, and the welding quality is affected by clamp precision and stability are solved; and the problem that the environment and the health of operators are threatened due to the fact that smoke cannot be effectively removed in the welding process is also solved.

The invention discloses a method for reducing pores by repair welding of internal defects of a thin-wall aluminum alloy casting. The method comprises the following steps: confirming and marking X-ray positions of the internal defects of the aluminum alloy casting; internal defects at the marked position are cleaned, the defects are required to be completely eliminated, and the cleaning position is smooth and has a certain groove angle; cleaning oil stains and oxidation films at the repair welding position of the casting; preheating the whole casting; welding a reverse support and adding a blowing protection tool; manual argon arc welding filling surfacing is carried out, arc surfacing is carried out from the periphery to the center, and excess weld metal is reserved; removing redundant weld joint materials of surfacing bulges of the casting; x-ray detection is conducted on the repaired casting, whether the pore defects generated after surfacing repair can meet related requirements or not is emphatically confirmed, and if pores gathered on the surface layer of a weld joint exist, the pores can be discharged through a hot pressing method. According to the method, through hole internal defect cleaning, reverse supporting, blowing protection increasing and arc drawing surfacing methods are adopted for conducting surfacing repairing on the internal defects of the casting, the quality of aluminum alloy casting products is guaranteed, and the rejection rate and the production cost are reduced.

The invention relates to the technical field of hub machining, in particular to a rim and spoke welding device which comprises a rotating mechanism, a workbench, an inner pressing mechanism, a horizontal pulling mechanism, an upper positioning seat, a lower positioning seat and two vertical guide plates, and the two vertical guide plates are fixedly mounted on a rotating seat of the rotating mechanism. When the automatic electric arc welding device is matched with a manipulator to carry out automatic electric arc welding, manual intervention is not needed during overturning, the upper positioning seat or the lower positioning seat above the hub automatically moves to the inserting rod during welding, no shielding exists above the hub, and the manipulator can carry out welding conveniently. In addition, during welding, the upper positioning seat and the lower positioning seat clamp the hub, then during overturning, due to positioning of the clamping ring, shaking is avoided in the overturning process, after overturning is completed, the hub is automatically positioned by the upper positioning seat or the lower positioning seat, and a mechanical arm can accurately conduct welding. And when the upper positioning seat and the lower positioning seat rotate, no obstacle exists, and collision cannot occur.

The invention belongs to the technical field of welding, discloses an electric arc welding process defect identification method based on multi-sensor information, and provides an electric arc welding process defect monitoring system based on welding process multi-sensor information. According to the system, current signals, temperature signals and visual image signals in the welding process are collected, the information theory and machine learning are combined, and real-time recognition of welding defects is achieved. The system aims at solving the problems of massive high-dimensional data volume generated by multi-sensor information fusion, rapid solving of appropriate model parameters and the like in a traditional welding defect detection method, and provides a welding defect identification method combining a mutual information method and a particle swarm optimization algorithm-least square support vector machine. Feature selection is carried out on multi-source sensing high-dimensional data through a mutual information method, optimization training is carried out on a particle swarm optimization algorithm-least square support vector machine model by utilizing a simplified data set, and a classification model established by the method has the characteristics of low complexity, short training and prediction time, relatively strong generalization ability and the like.

The invention provides a swing control method based on molten pool oscillation multi-feature fusion and related equipment, and relates to the technical field of welding, the method comprises the steps that in the argon arc welding process, an electric arc signal and a molten pool oscillation signal of a variable wall thickness welding area are collected in real time; oscillation amplitude, main frequency characteristics, current fluctuation coefficients and voltage-current phase difference characteristics are extracted from the molten pool oscillation signals and the electric arc signals and combined, and an oscillation comprehensive characteristic matrix is obtained; inputting the oscillation comprehensive characteristic matrix into a pre-trained classification model, and identifying a current molten pool state type; a corresponding swing compensation strategy is matched according to the state type of the molten pool, and asymmetric swing parameters are generated; and the asymmetric swing parameters and a preset basic welding track are subjected to superposition operation, and a composite control instruction is generated to control a welding gun to execute asymmetric swing welding. By implementing the method, different abnormal states of different molten pools can be subjected to differential control, and the stability of the variable-wall-thickness welding process and the forming quality of a final weld joint are improved.

The invention relates to the technical field of pipeline splicing and welding, and discloses a rapid splicing and welding device for a large pipeline in a narrow space, which comprises a base, a butt joint assembly is arranged on the upper part of the base, a lower hoop plate is arranged on the outer surface of the butt joint assembly, and an upper hoop plate is arranged on the upper part of the lower hoop plate; an automatic electric arc welding mechanism is arranged in the driving assembly, the butt joint assembly comprises a support fixedly connected to the upper surface of the base, a lead screw is slidably inserted into the middle of the support in a penetrating mode, and the end of the lead screw is fixedly connected with the side edge of the lower hoop plate. The pipeline is locked through splicing of the upper hoop plate and the lower hoop plate, bidirectional extrusion force is generated through cooperation of the inclined butt joint groove and the butt joint block, the pipeline is synchronously held by the upper hoop plate and the lower hoop plate, after the ends of the hoop plates are aligned, the pipeline is accurately arranged in the circular hoop in a sleeved mode, misalignment caused by gravity sagging is effectively eliminated, concentric alignment of the welding ends is rapidly completed, and the welding efficiency is improved. And the assembly precision and efficiency are improved.

The invention discloses a milling cutter workpiece feeding device of a milling cutter welding machine, and relates to the technical field of milling cutter welding. By arranging the rotary table, the multiple milling cutter clamping assemblies and the feeding control assemblies, when the rotary table rotates, each milling cutter clamping assembly can load the milling cutter assemblies to sequentially pass through the feeding control assemblies at multiple positions, and when the milling cutter clamping assemblies meet the feeding control assemblies, the milling cutter assemblies can be loaded on the feeding control assemblies to sequentially pass through the feeding control assemblies at multiple positions; the feeding control assembly can be triggered and control the blade to be automatically assembled to the cutter groove, and after the blade and the cutter groove are assembled, the electric arc welding mechanical arm can be automatically controlled to weld the blade according to a preset program. After one feeding control assembly completes welding, 120-degree overturning can be completed when the feeding control assembly meets the other feeding control assembly, blade welding operation can be automatically conducted on the next cutter groove, and therefore automatic overturning of the milling cutter assembly, automatic assembly of the blade and the cutter groove and automatic switching of the welding position can be achieved; the purpose of automatically welding the milling cutter assembly is achieved.

A gate electric arc welding device belongs to the technical field of welding and aims to solve the problems of muscle fatigue and welding quality reduction caused by long-time holding of a welding gun by a user. The gate electric arc welding device comprises a welding machine, an air outlet assembly is arranged on one side of the welding machine, one end of the air outlet assembly is communicated with the welding gun, and two fixing sleeves are fixedly arranged on the outer ring of the welding gun; a plurality of inclined blocks are oppositely arranged on the two fixing sleeves, sliding assemblies are slidably arranged on the outer walls of the two fixing sleeves, fixing assemblies are slidably arranged on the outer walls of the sliding assemblies, moving assemblies are fixedly arranged on one sides of the fixing assemblies, acceleration sensors are installed on one sides of the moving assemblies, and two compensation assemblies oppositely communicate with the outer wall of the welding gun; a user can be conveniently assisted in pushing the welding gun for movable welding, so that the situation that the welding quality is reduced due to the fact that the user holds the welding gun by hand for a long time is avoided, and meanwhile, dynamic speed compensation can be conducted when the non-uniform-speed phenomenon occurs in the moving process of the welding gun, so that the welding gun is always kept in the uniform-speed welding state.

The invention relates to a low-power pulse laser-induced enhanced double-TIG (Tungsten Inert Gas) composite heat source medium-thickness plate narrow-gap efficient welding method, which adopts two independent TIG welding machines, a pulse laser and a wire feeder, and two TIG welding guns are positioned in a narrow-gap groove on the same side of a plane on which a laser beam perpendicular to the plate welding direction is positioned, the angle and distance of each heat source can be independently adjusted, before welding, the space angle and distance among the two TIG welding guns, laser beams and welding wires are adjusted, tungsten electrodes at the front ends of the two TIG welding guns and the laser beams emitted by a laser device are arranged in the corresponding space range, and a plate to be welded and the welding wires can obtain sufficient heat for melting, wetting and spreading; during welding, welding parameters are adjusted, the coupling plasma energy density in the narrow gap space range is controlled, and the droplet transition behavior of a welding wire and the flow characteristic of a molten pool are adjusted and controlled in real time. Compared with traditional arc welding, the welding process window can be improved, and the welding deposition efficiency is improved by more than 10 times.

The invention belongs to the field of argon arc welding devices, and particularly relates to an automatic device for circular tube butt-joint argon arc welding, which comprises a base, and a circular tube butt-joint positioning assembly is arranged on the base; the round pipe butt joint positioning assembly comprises a rotating plate rotationally arranged on one side of the upper end face of the base, two transverse moving columns are distributed on the upper end face of the rotating plate in a 90-degree array mode with the rotating shaft as the axis, the transverse moving columns are slidably connected to the rotating plate, and a connecting plate is fixedly connected to the upper end of the rotating plate. According to the round pipe butt joint device, automatic butt joint of round pipes is achieved through the round pipe butt joint positioning assembly, the round pipe feeding assembly, the orientation angle recognition assembly and the material moving assembly, the process that operators conduct manual butt joint on the round pipes is omitted, and the labor intensity is reduced. The orientation and the angle of the circular pipes are judged in a distance sensing mode, the two circular pipes are accurately adjusted to be at the proper angle, then it is guaranteed that the inclined faces of the two circular pipes are accurately attached, weld joint deviation is avoided, and therefore it is guaranteed that welding work is conducted smoothly.

The invention discloses a semi-solid ultrasonic rolling synchronous auxiliary electric arc additive manufacturing device and method, and the device comprises an ultrasonic rolling device, and further comprises an electric arc welding gun device, an automatic wire feeding device, a manipulator, a control system device, a protective gas cylinder and a clamp device. When semi-solid ultrasonic rolling synchronous auxiliary electric arc additive manufacturing is carried out, the electric arc welding gun is fixed to one mechanical arm, the synchronous ultrasonic rolling device is fixed to the other mechanical arm, and the two mechanical arms are controlled by the control system device to move synchronously. The invention provides a structure regulation and control method of applying ultrasound and rolling composite to a semi-solid area of an electric arc additive manufacturing near-molten pool, and utilizes stirring and cavitation effects of the ultrasound and a deformation-induced recovery recrystallization effect to promote escape of bubbles, effective welding of pores and full crushing and refining of dendritic crystals, so that the mechanical property of the electric arc additive manufacturing near-molten pool is improved. And finally, regulation and control of the compact equiaxed fine grain structure in electric arc additive manufacturing are achieved.

The invention discloses a building automation electric arc welding robot arm which comprises a mechanical arm body, a telescopic supporting column, an adjusting assembly and a welding mechanism, a rotating disc is rotatably arranged at the output end of the mechanical arm body, and the telescopic supporting column is fixedly arranged on the rotating disc; the welding mechanism is connected with the telescopic supporting column through the adjusting assembly, the adjusting assembly comprises a first deflection telescopic rod, a two-way telescopic rod, a second deflection telescopic rod and a driving assembly, the first deflection telescopic rod is rotationally connected with the telescopic supporting column in a limiting mode, and a hydraulic telescopic rod is hinged between the first deflection telescopic rod and the telescopic supporting column; the first deflection telescopic rod and the second deflection telescopic rod are rotationally arranged at the two ends of the bidirectional telescopic rod in a limited mode respectively, driving assemblies are arranged between the bidirectional telescopic rod and the first deflection telescopic rod and between the bidirectional telescopic rod and the second deflection telescopic rod, and the welding mechanism is rotationally arranged at the output end of the second deflection telescopic rod.

The invention provides a positive and negative pressure pulse electric arc welding and additive manufacturing method which comprises the following steps: inducing electric arc plasma to generate a negative pressure electric arc with an anti-gravity adsorption effect through a current-magnetic field-hollow tungsten electrode-gas collaborative design, and forming a time sequence coupling process with a positive pressure electric arc. The core of the method is that a magnetic control positive pressure and negative pressure electric arc welding external field is cooperated with a molten pool reconstruction forming mechanism, that is, the dynamic and thermodynamic states of a molten pool are accurately balanced by dynamically switching the electric arc pressure direction and regulating and controlling the action proportion and alternating frequency of negative pressure and positive pressure electric arcs. A self-adaptive magnetic field threshold model based on current intensity and a gas mode is combined with variable polarity power supply parameters and gas flow rate cooperative control, and the problems of thin plate welding fusion penetration and thin-wall additive molten pool instability are effectively solved. According to the method, a welding wire, powder or laser composite manufacturing mode can be integrated, the forming precision and performance of a complex structure are remarkably improved, and an innovative technical support is provided for high-quality and high-efficiency welding and additive manufacturing.

The invention discloses an argon arc welding linear welding device and method, and particularly relates to the technical field of welding, the device comprises an argon arc welding assembly and a product fixing assembly, a hollow cavity of a product is filled with a filling material, and a plugging pressurizing assembly is arranged at an end opening of the hollow cavity in the upper bottom of a fixing seat; the plugging pressurizing assembly comprises a plugging seat and a plugging moving driver, one end, corresponding to the product, of the plugging seat is provided with a plugging head clamped and matched with the hollow cavity, and the plugging moving driver is used for driving the plugging seat to move. The filling material is added into the hollow cavity of the product, the thin-wall structure of the product is supported by means of the filling material from inside to outside, the product is stably fixed in cooperation with extrusion of the fixing clamp from outside to inside, meanwhile, the filling material can effectively conduct heat of a welding point, and the welding quality of the product is improved. And thermal deformation stress caused by overlarge temperature difference in the length direction of the product is avoided.

A flux-cored wire for arc welding, including a steel sheath filled with flux, where the wire contains, relative to a total mass of the wire, Cr: 16.0 to 22.0 mass %, Ni: 6.0 to 11.0 mass %, Mn: 0.7 to 2.6 mass %, Si: 0.1 to 1.1 mass %, Zr: 0.2 to 0.8 mass %, Fe: 45.0 to 65.0 mass %, TiO2: 5.0 to 9.0 mass %, SiO2: 0.1 to 2.0 mass %, ZrO2: 0.5 to 3.0 mass %, and Bi: less than 0.0020 mass %. Where by mass %, a Si content is denoted by [Si] and a Zr content is denoted by [Zr], a value of parameter A expressed by A=[Si]+2×[Zr] satisfies 1.4 to 2.5.

The invention discloses a bimetal composite pipe end welding device and method, and relates to the technical field of welding, the bimetal composite pipe end welding device and method comprise a base, a fixing plate and a welding mechanism, the fixing plate is arranged on the top of the base, the welding mechanism is arranged on the inner side of the fixing plate, and the welding mechanism is arranged on the inner side of the fixing plate. The welding mechanism comprises a first motor, cutting machines, a spring telescopic rod, a second welding machine mechanism and a protective barrel plug, the first motor is used for driving the cutting machines to conduct position adjustment according to the size of an actually-welded pipeline, and after the multiple cutting machines cut the outer layer of a section of double-layer pipeline, the argon arc welding machine mechanism on the mounting ring is driven to surround the outer side of the pipeline; the outer layer welding is completed according to the inner layer welding principle, overall welding of the bimetal composite pipe is achieved, the problems of weld cracks and air holes caused by traditional bimetal composite pipe welding are avoided, the welding quality is improved, the production cost is reduced, and the working time is shortened.

The present invention relates to the technical field of hybrid laser welding devices, in particular to a hybrid laser arc welding system suitable for a complex welding structure, which is suitable for a complex welding structure, such as a welded part that is provided with multiple weld seams and multiple joints and meets requirements for multiple welding poses, and is suitable for batch welding thereof. The welding orientations for laser welding and arc welding do not need to be manually adjusted, which saves time and labor, facilitates and speeds up operations of adjustment and welding, and greatly improves the working efficiency. Also, it can be effectively ensured that the same welding condition and welding orientation are used for multiple weld seams, the accuracy is high, and after welding, the welding quality of a welded workpiece is ensured. Moreover, further provided is a hybrid laser welding method, which matches the described hybrid laser welding system, according to which, after adjustment to basic welding parameters is completed, subsequent welding of batch-welded members only needs to be adjusted on the basis of process requirements, and automated adjustment can be achieved, thus completing efficient and high-quality batch welding.

The invention provides an argon arc welding tungsten electrode appearance defect detection method and system and a storage medium, and relates to the technical field of tungsten electrode appearance detection.The method comprises the steps that firstly, a sample electrode with known defects is subjected to three-dimensional scanning and discretization into a plurality of space points, and each point is endowed with a defect existence mark; by applying a composite sine wave excitation current, an eddy current signal generated when a collector spirally passes through a detection coil at a constant speed is acquired, and laser ultrasonic scanning is synchronously utilized to acquire full-matrix data and reconstruct a three-dimensional gray model. And constructing a double-branch deep learning model, fusing the eddy current feature vector and the ultrasonic image block feature, and learning a mapping relationship between the eddy current feature vector and the defect mark. And performing the same detection on a to-be-detected electrode, outputting the defect confidence of each position by using the trained model, calculating a comprehensive quality index in combination with a preset defect severity weight and a spatial key region weight, and judging whether the electrode is qualified or not according to a qualified threshold value. According to the invention, high-precision, automatic and comprehensive detection of surface and internal defects is realized.

The invention discloses an automatic electric arc welding machine for chain welding and a control method thereof, and relates to the technical field of electric arc welding, the automatic electric arc welding machine comprises a side plate and a control module, the side wall of the side plate is fixedly connected with a fixing table, and a front-back through groove is formed in the middle of the upper side of the fixing table; baffles are fixedly connected to the positions, located on the lower portions of the two sides of the fixed table, of the side wall of the side plate, gears are rotationally connected to the sides, away from the side plate, of the lower ends of the two baffles through bearings, and a rotation angle detection module is arranged at one end of the gear on the right side. The resistance value of the link shackle is measured before welding and transmitted to the control module, the power of the argon arc welding machine can be intelligently adjusted according to the material or oxidation degree of the link shackle, pseudo soldering caused by insufficient power or burn-through caused by overlarge power is avoided, the energy utilization rate and welding adaptability are improved, and the production cost is reduced. The device has the characteristics of sensing the state of the chain shackle in real time and dynamically adjusting welding parameters according to the state.

The invention discloses a motor home axle welding device and method, and belongs to the technical field of welding, the motor home axle welding device comprises a supporting seat, a sliding rail assembly is connected to the supporting seat, an automatic rotating arm is connected to the sliding rail assembly, an electric arc welding gun is arranged outside the automatic rotating arm, a supporting rail is connected to the supporting seat, and a base plate is connected to the supporting rail. According to the invention, the clamping plate, the third pin shaft piece, the fourth pin shaft piece, the telescopic rod, the liquid storage frame, the hydraulic rod, the second spring and the sliding connecting block are adopted, so that additional stress generated by axial expansion can be effectively absorbed and dispersed through small displacement in the transverse direction; therefore, the problems of structural deformation, welding dislocation or welding stress concentration caused by the size change of the axle main body in the welding process are avoided, through the linkage adjusting effect of the mechanism, the deformation influence caused by thermal expansion of the axle main body in the welding process can be effectively reduced, the automatic electric arc welding precision is improved, and the welding quality is improved. And the automatic electric arc welding quality and the assembly precision are ensured.

The invention discloses a method for performing visual inspection on surface forming quality characteristics of a welding seam by utilizing three-dimensional reconstruction, which comprises the following steps of: S1, performing uniform-speed scanning on the welding seam along the direction of a welding bead by using linear structured light emitted by a linear laser, and performing image acquisition on linear structured light stripes formed on the surface of the welding seam by using an industrial camera; s2, converting the acquired RGB image into a gray level image frame by frame, and carrying out image distortion correction and image denoising processing; s3, carrying out ROI (Region of Interest) positioning on the formed line structured light stripe image on the surface of the welding seam by adopting a pixel point gray level distribution calculation method; s4, carrying out image segmentation on the ROI region of the weld line structured light stripe image; and S5, carrying out sub-pixel-level center line extraction on the ROI of the weld line structured light stripe image by adopting a gray extreme value weighted centroid method. Automatic detection of welding seam forming quality characteristics such as laser welding and electric arc welding can be achieved, and the operation efficiency of a production line and the welding seam quality detection precision can be greatly improved.

The invention relates to the technical field of intelligent welding equipment, and discloses a metal product electric arc welding clamp which comprises a rack, a main workpiece fixing module, an auxiliary workpiece fixing module, a state sensing module and a control module, the main workpiece fixing module comprises a distance adjusting unit and at least two fixing parts, and each fixing part is composed of a lateral clamping unit and a top pressing unit. The main workpiece fixing module, the auxiliary workpiece fixing module, the state sensing module and the control module form an intelligent clamping system, a traditional passive rigid welding clamp is changed, a simplified thermal-mechanical coupling finite element model is constructed and operated in real time, the workpiece deformation trend and the stress state in the welding thermal process are accurately predicted, the force and the position of a clamping mechanism are actively adjusted in advance, and the welding quality is improved. The posture of the main station is continuously and stably maintained; therefore, the welding precision and consistency are improved, and the thermal deformation and residual stress of the workpiece are inhibited.

The invention provides an automatic wire feeding device of a gas shielded welding machine, which belongs to the technical field of electric arc welding equipment and comprises a wire feeding motor, a wire feeding wheel and a wire pressing wheel. Wherein a rotating frame is installed on the side, close to the wire incoming direction, of the output end of the wire feeding motor, a movable straightening wheel and two fixed straightening wheels are installed on the two sides of the center of the interior of the rotating frame respectively, the movable straightening wheel is located between the two fixed straightening wheels, and the rotating frame is arranged to be capable of rotating around the center of the wire guiding pipe. By arranging the rotating frame, the movable straightening wheel and the fixed straightening wheel, a drawn welding wire penetrates through the space between the movable straightening wheel and the fixed straightening wheel in the rotating frame before entering the wire feeding wheel, and the movable straightening wheel and the fixed straightening wheel exert pressure on the circumference of the welding wire along with rotation of the rotating frame; the bending of the welding wire in any direction of the whole circular section can be straightened, and unsmooth wire feeding caused by the fact that the tilting distance of the welding wire is too large is avoided.

The invention discloses a reheating boiler martensite heat-resistant steel welding device and method, belongs to the technical field of welding, and provides the following scheme that the reheating boiler martensite heat-resistant steel welding device comprises an electric arc welding mechanism, an electric arc welding auxiliary mechanism is connected to the electric arc welding mechanism, the electric arc welding mechanism comprises electric arc welding equipment, and an electric arc welding assembly is connected to the electric arc welding equipment; the electric arc welding auxiliary mechanism comprises a walking assembly, and a one-way transmission assembly and a hydraulic control assembly are arranged in the walking assembly. The purpose of multi-directional angle adjustment of the welding rod can be achieved through the welding rod angle adjusting assembly, the actual welding requirement is met, the welding rod can be automatically erected through combination of the walking assembly, the hydraulic control assembly and the arc welding assembly, walking constant-speed welding is conducted through the walking assembly, the welding position and the welding process are accurately guaranteed, and the welding efficiency is improved. The one-way transmission assembly drives the protruding block to control the hydraulic control assembly, so that the welding rod moves downwards at a constant speed to be close to the welding position, the welding effect is guaranteed, and meanwhile the welding quality is improved.

To suppress a welding quality from deteriorating even if an arc-interruption occurs due to arc blow, in consumable electrode pulse arc welding.SOLUTION: In a consumable electrode pulse arc welding control method, in which a welding wire is fed at regular feeding speed and rising transition currents that rise from base currents to peak currents are distributed during a rising period of time, the peak currents are distributed during a peak period of time, falling transition currents that fall from the peak currents to the base currents are distributed during a falling period of time, the base currents are distributed during the base period of time, and welding currents Iw described above are repeatedly distributed in a first pulse period to perform welding, feeding speed Fw in an arc-interruption period of time at times of T13-t2 is set to be higher than the regular feeding speed at times of t1-t13.SELECTED DRAWING: Figure 2

The invention belongs to the field and particularly relates to an electric arc welding machine which comprises an electric arc welding device and a robot, the electric arc welding device comprises an electric arc welding gun and a control device which are installed at the execution end of the robot, and the control device comprises a main controller, a motion controller, a man-machine interaction module and a singular point avoiding system. In the process that the robot loads the arc welding gun to execute a welding task, singular points in a welding track are found and avoided through the singular point avoiding system. According to the electric arc welding machine, the singular point avoiding system is integrated in the control device, and the singular point avoiding system is used for discovering and avoiding singular points in a welding track in the process that the robot is loaded with the electric arc welding gun to execute a welding task. Therefore, continuous welding operation is effectively guaranteed, continuity and smoothness of the welding process are achieved, the quality problem caused by welding interruption is avoided, and whole-course intelligent welding is achieved.

The invention discloses electric arc welding equipment for machining an aluminum alloy door and window frame, and relates to the technical field of door and window machining. The device comprises a rack, a pressing device is fixedly installed on the rack, a welding device is installed on the pressing device in a sliding mode, an overturning assembly is fixedly installed on the rack, a fixing device and a locking assembly are installed on the overturning assembly, and an unlocking assembly is installed on the rack in a sliding mode. After the frame is clamped through the fixing device, the pressing device drives the welding device to move downwards to complete welding of the first side of the frame; the welding device continues to move to drive the overturning assembly to drive the fixing device to overturn, and after overturning, the locking assembly locks the overturning position; the pressing device drives the welding device to move reversely to complete second side welding; and finally, the downward pressing device lifts the welding device to be separated from the frame, meanwhile, the linkage unlocking assembly relieves locking, and the problems that existing equipment is difficult to automatically turn over, and manual operation is tedious and low in efficiency are solved.