1089results about "Electrode supporting devices" patented technology

The invention relates to the technical field of welding, in particular to a corrosion steel welding cooperative control method and system. Comprising the following steps that welding seam geometric parameters, molten pool dynamic characteristic parameters and welding heat input parameters in the corrosion steel welding process are collected in real time through a multi-dimensional sensor array; constructing a corroded steel welding seam feature space model based on the welding seam geometric parameters, and determining material corrosion grade distribution and mechanical property parameters of a welding seam area in combination with a preset corroded steel material database; a molten pool form evolution prediction model is established through an adaptive Kalman filtering algorithm by utilizing the dynamic characteristic parameters of the molten pool and the welding heat input parameters, and the solidification behavior and the welding seam forming trend of the molten pool are predicted in real time; according to the material corrosion grade distribution, the mechanical property parameters and the molten pool forming trend, a dynamic adjustment strategy of the welding process parameters is generated through a multi-objective optimization algorithm; the reliability and safety of the corrosion steel welding joint can be improved.

The invention discloses a multi-welding-robot collaborative operation system based on digital twinning, and belongs to the technical field of intelligent manufacturing and robot control, the system comprises a physical space module, a virtual space module, a twinning data layer and a control module, and communication connection is established among the physical space module, the virtual space module, the twinning data layer and the control module; the physical space module comprises a plurality of welding robots, a sensor group and a data transmission network; the virtual space module comprises a multi-welding robot twinning body and a workpiece twinning model; the twin data layer is used for connecting the physical space module and the virtual space module; and the control module generates a welding path optimization scheme, a multi-welding-robot collaborative collision avoidance strategy and a welding quality feedback control instruction based on the twin data layer. According to the method, a closed-loop control framework of'physical-virtual 'bidirectional mapping is constructed, so that dynamic collaborative optimization of multi-robot motion trails, welding seam forming and thermal deformation is realized.

The invention relates to the technical field of industrial automatic welding and discloses an intelligent control method and system for industrial robot welding, and the method comprises the steps that after a welding task is started, an initial welding process parameter model is called based on the current workpiece specification, and a first welding control instruction sequence is generated; according to the first welding control instruction sequence, a welding gun is controlled to execute welding operation, and multi-source sensing data flow in the welding process is synchronously collected; carrying out fusion feature extraction on the real-time sensing data stream to generate a current welding situation feature vector, when situation deviation exists between the current welding situation feature vector and the reference welding situation feature vector, obtaining a self-adaptive welding process parameter model through online incremental learning, and obtaining a self-adaptive welding process parameter model on the basis of the self-adaptive welding process parameter model. And generating an optimized welding control instruction sequence and issuing the optimized welding control instruction sequence to a robot controller and a welding gun so as to execute self-adaptive welding operation. The welding quality stability and the production efficiency can be improved, and the equipment maintenance cost is reduced.

The invention discloses an intelligent welding control system and method based on multiple sensors and electronic equipment, and belongs to the technical field of automatic welding, the system comprises a sensing layer, a decision-making layer and an execution layer, through cooperative work of a front laser vision sensor, a rear laser vision sensor and a molten pool image sensor, a groove three-dimensional model can be accurately established before welding, and the welding precision is improved. And dynamic information of the molten pool is continuously collected in the welding process, a dual monitoring mechanism for the geometric characteristics of the welding line and the state of the molten pool is formed, and multi-source data collection and fusion in the whole welding process are achieved. The control method comprises the steps of pre-scanning modeling, feedforward parameter planning, real-time feedback adjustment of a molten pool, data fusion optimization and the like, and high-precision self-adaptive control over welding parameters is achieved by combining deep learning and the Kalman filtering technology. According to the method, the welding adaptability, the control precision and the intelligent level can be remarkably improved, and the method is suitable for high-precision welding scenes such as pipelines, pressure containers and steel structures and has remarkable engineering application value and popularization prospects.

The invention belongs to the technical field of reinforcement cage auxiliary welding, and mainly relates to a photovoltaic cement ground pile reinforcement cage welding tool which comprises a welding robot and a welding positioning mechanism. The welding positioning mechanism comprises a supporting unit, and the supporting unit is provided with a first positioning station and a second positioning station. When the photovoltaic cement ground pile on the second positioning station is welded by the welding robot, the ground pile pipe, the triangular hoop and the reinforcing steel bar can be fed, positioned and placed at the first positioning station by the worker, so that the two positioning stations cannot be idle; the photovoltaic cement ground piles are welded and fed alternately on the first positioning station and the second positioning station, so that the frequency of manually carrying materials can be reduced, the labor intensity is reduced, and meanwhile, the production efficiency can also be improved.

The invention belongs to the technical field of fusion welding, and particularly relates to a method for planning multi-layer and multi-welding-seam welding parameters according to welding seam feature information, which comprises the following steps: 1) laser emitted by a 3D visual sensor is perpendicular to a welding seam and scans along the direction of the welding seam, and the 3D visual sensor scans welding seam data and transmits the data to a robot controller in real time; (2) the robot controller processes the weld joint data, the whole weld joint is subjected to multi-layer and multi-pass planning calculation, and the number of welding layers and the number of welding passes of each layer are planned; (3) the robot controller calculates the layer number and the channel number of a welding channel needing to be welded currently, a welding gun track coordinate set on a welding path and welding parameters corresponding to welding path points; and (4) the robot controller adjusts the welding track and the welding parameters in real time according to the step (1) to the step (3) in the current welding bead welding process, so that the purpose of multi-layer and multi-pass planning self-adaptive welding of the medium-thickness plate is achieved.

The invention provides a water turbine runner crack electric arc additive repairing track planning method based on an irregular model, and relates to the technical field of hydroelectric power generation equipment crack repairing. The method comprises the steps that crack defects are removed through carbon arc air gouging, and a model of a blade area to be repaired is established; based on a reverse reconstruction technology and a Boolean operation technology, generating a three-dimensional grid model of the irregular repair area; a mixed trajectory planning strategy is optimized, and the repairing area is sliced to generate an electric arc additive repairing trajectory; and welding gun posture optimization based on collision detection is carried out, and the contour track is adjusted according to a given rule. A geometric model of a to-be-repaired area of a blade is established, and a three-dimensional grid model of an irregular repaired area is quickly and accurately established based on a reverse reconstruction technology and Boolean operation.

A double-track welding system is provided. A first track is detachably mounted on a first side of a weld seam of a workpiece, and a second track is detachably mounted on a second side of the weld seam of the workpiece. The first track and the second track are both mounted on a fixed support, and the fixed support can drive the first track and second track to move. At least one welding trolley is arranged on each of the first track and the second track. An image acquisition component is used for acquiring an image of a part to be welded; a weld seam scanning device is used for acquiring the weld seam morphology; and a control system is used for controlling, according to the image of the part to be welded, the fixed support to move.

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

A corrugated copper submarine cable and a submarine cable production device. The submarine cable production device comprises a worktable, and further comprises: a fixing compartment arranged in the middle of the upper surface of the worktable, wherein a fixing pipe penetrates the interior of the fixing compartment, a winding assembly is arranged on the circumferential surface of one end of the fixing pipe, and the winding assembly comprises a rotating ring rotatably arranged on the circumferential surface of the fixing pipe; and a welding compartment arranged on one side of the fixing compartment, wherein two support frames are arranged in the welding compartment, the top ends of the two support frames are both fixedly connected to limiting rings, a positioning ring is rotatably arranged between the two limiting rings, the inner wall of the positioning ring is fixedly connected to a plurality of arc welding heads, and the plurality of arc welding heads are distributed in a circumferential array along the inner wall of the positioning ring. By providing a welding assembly, the present invention solves the problem of reduced production efficiency of corrugated copper submarine cables caused by a relatively slow welding speed and low efficiency during normal welding in which welding is performed by a large number of technicians to generate corrugated textures.

The invention provides a welding device for machining a bedstead, and relates to the technical field of bedstead welding, the welding device comprises a workbench and a welding gun for welding the bedstead; a driving block is horizontally and slidably connected to the workbench, a supporting block used for supporting the transverse rod is vertically and slidably connected to the workbench, a first positioning block and a second positioning block are arranged on the supporting block, the first positioning block is fixedly connected with the supporting block, a transmission mechanism is arranged between the supporting block and the driving block, and the transmission mechanism drives the transverse rod to move close to the longitudinal rod. A first driving mechanism used for driving the driving block to move horizontally is arranged below the workbench. A plurality of positioning mechanisms are arranged on the workbench; the driving block is connected with supporting seats used for supporting the longitudinal rod, and the supporting seats located at the two ends of the longitudinal rod are fixedly connected with positioning inclined plates used for positioning the longitudinal rod. The size of gaps between the two ends of each transverse rod and the size of gaps between the two longitudinal rods can be equal, and the welding quality of the bedstead is ensured while the appearance of the bedstead is controlled.

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

The invention discloses a laser-based long-distance pipeline welding defect prevention and treatment device and method, and belongs to the technical field of pipeline welding. The device comprises a welding power and power supply device, a welding master control device and a movement device moving in the circumferential direction of a to-be-welded pipeline; a welding device I, a welding device II and a welding seam scanning device are borne on the moving device, the welding device I and the welding device II are each provided with a welding gun, and a laser emitting device is installed on one side of each welding gun; the welding device II is further provided with an ultrasonic loader. The welding guns are calibrated through laser, the alignment degree between the welding guns is improved, meanwhile, through laser scanning, the parallelism between the welding guns and the grooves is improved, and the risk of welding deviation is reduced; the surface of the welding seam is scanned by the welding seam scanning device, so that welding defects on the surface are timely and comprehensively found; and according to the position of the welding defect, the molten pool is stirred or vibrated through the ultrasonic loader, the fluidity of the molten pool is improved, and the incomplete fusion or undercut defect is filled.

The invention relates to the technical field of furnace shell welding, in particular to a gas industrial furnace shell welding device which integrates a radial circular seam and an axial longitudinal seam, a servo motor drives a planetary gear train through an intermittent sheave, a rotating shell drives a clamped furnace shell to rotate, and radial welding is completed; after a bottom clamping jaw instantly locks a shell, power is switched to a planet carrier, an outer mounting arm drives a driven scraping arm to grind the inner wall while axially moving, welding and grinding synchronization is achieved, a bidirectional pushing seat crank sliding block mechanism continuously rotates in a one-way mode to push and pull the furnace shell in a two-way mode, whole-circle accurate grinding is achieved during resetting, and six sets of air cylinder lead screw adjustable clamping jaws conduct internal and external synchronous supporting. The outer supporting cylinder is prevented from deformation, secondary clamping is not needed in the whole process, butt joint of multiple sections of furnace shells is completed at a time, continuous filling of a longitudinal weld bead can be completed when a circular seam is still in a high-temperature plastic stage through instantaneous switching of clamping and stopping, and the welding quality of a T-shaped connector area is improved.

The present invention belongs to the technical field of welding equipment, and in particular relates to a welding machine for the construction framework of building curtain walls, which includes a base, and also includes: an automatic welding mechanism, a pressurizing and stabilizing mechanism, multiple groups of positioning and locking mechanisms, a mechanism for adjusting the magnitude of the applied pressure, a mechanism for synchronously feedbacking the thickness of the framework, a welding current control mechanism, a welding speed control mechanism, and a PLC controller. The present invention can perform fast and stable automatic welding operations on the curtain wall framework, effectively improving the welding quality and welding efficiency, and can automatically adjust the magnitude of the welding current based on the thickness of the framework. When the increase degree of the welding current reaches the threshold value, the welding speed can be automatically reduced, so that more heat can act on the weld seam per unit time, ensuring that the weld seam is completely penetrated. During the welding process, additional pressure can be applied to ensure the stable contact of the transverse and longitudinal splicing members, ensuring the welding quality.

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

To provide a multiaxial 3D printing device for metal structural components and an arc-based additive manufacturing method.SOLUTION: Based on a multiaxial coordinated printing mode of a robot arm device, a movable guide rail device, and a positioner device, expansion of a six-axis robot arm enables printing in a robot arm's free posture and moving a guide rail enables movable printing following an axis along the guide rail, an open motion space of the 3D printing robot is enlarged, a two-axis positioner allows achieving multiaxial 3D printing without support for complex metal structural components, reducing material costs, and simplifying post-processing. Simultaneously, linkage linear interpolation through a world coordinate system allows effective controlling printing accuracy and print accuracy and large-format dimensions and further achieving multiaxial 3D printing for large and complex metal structural components.SELECTED DRAWING: Figure 1

The invention relates to the technical field of welding devices, and provides an industrial welding robot which is used for pipeline butt welding and comprises a slag stopping box which is movably arranged on one side of a pipeline. The welding head is arranged on the slag stopping box, and the slag stopping box moves to drive the welding head to be close to the pipeline butt joint position. The slag stopping pieces are slidably arranged relative to the slag stopping box, the slag stopping pieces are arranged in the circumferential direction of the slag stopping box, and the side walls of the adjacent slag stopping pieces abut against each other; the slag stopping pieces are used for abutting against the side wall of the pipeline after sliding, the welding head is located among the multiple slag stopping pieces, and the slag stopping box and the slag stopping pieces are used for stopping splashing welding slag generated by welding of the welding head. By means of the technical scheme, the technical problem that in the prior art, splashing welding slag in the welding process easily damages the surface quality of the other parts of the to-be-welded part is solved.

The invention relates to the technical field of welding automation, and discloses an intelligent welding system for an electric pole steel reinforcement framework. The system comprises a welding execution module, a multi-mode sensing module, an edge calculation module, a real-time regulation and control module and a system control center. Synchronous collection and real-time analysis of images, temperature and sound signals of a welding pool area are achieved, so that defects such as air holes, slag inclusion and incomplete fusion can be recognized online in a key time window when the welding pool is not solidified, and time delay caused by a traditional off-line detection mode is thoroughly eliminated. Through a real-time regulation and control module, on the basis of a multi-target optimization decision and parameter self-adaptive adjustment mechanism, the system can dynamically adjust key process parameters such as welding current, arc voltage and welding speed at the moment of identifying defect germination or process deviation, and real-time intervention and closed-loop control on welding quality are achieved; therefore, the final formation of defect welding seams is avoided fundamentally, and the rework rate and the material waste are remarkably reduced.

The present application discloses a welding gun for U-shaped dense tubes, which relates to the field of welding equipment, and includes a fuselage and a machine head. The machine head is arranged at one end of the fuselage, and a receiving cavity is formed in the machine head. The receiving cavity is arranged at an end away from the fuselage, and the U-shaped tube and two straight tubes connected to the U-shaped tube extend from the open end of the receiving cavity into the receiving cavity of the machine head, and the end wall of the machine head away from the fuselage abuts against the outer wall of the heat exchanger chassis, and a welding mechanism is arranged on one side of the machine head located in the receiving cavity, and the welding mechanism welds the plug-in joint of the U-shaped tube and the straight tube. The present application uses the fuselage to drive the machine head to move, and the machine head is arranged on a U-shaped tube and two straight tubes through the receiving cavity cover, so as to weld the plug-in joint of the U-shaped tube and a straight tube, thereby facilitating the welding of the dense tube bundle of the heat exchanger.

The invention relates to the technical field of robot welding, in particular to a mobile intelligent welding robot for seat production, which comprises an autonomous mobile chassis for autonomous navigation and obstacle avoidance in a seat production workshop; the multi-degree-of-freedom mechanical arm is used for achieving complex space track welding; the welding actuator is used for completing high-precision welding operation; the visual identification system is used for capturing the welding seam position in real time, detecting the welding quality and feeding back to the control system; the central controller is used for coordinating the operation of each module; through the steps, flexible movement of the robot in a production workshop is achieved through the autonomous moving chassis and the SLAM navigation technology, so that the utilization rate of equipment is increased, the occupied area of a production line is reduced, the multi-degree-of-freedom mechanical arm and the high-precision visual recognition system are combined, the complex welding seam track of the seat framework can be recognized in a self-adaptive mode, and the production efficiency is improved. And the pose deviation in the welding process is compensated in real time through force sense feedback, so that the consistency of the welding seam forming quality is ensured.

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 field of welding devices, discloses a seamless welding device and method for a building technology, and solves the problem that relative displacement may occur between steel pipes and a clamping piece when two steel pipes are close to each other and are pressed at present, a workbench is arranged, a welding mechanism and a steel pipe fixing mechanism are arranged at the top end of the workbench, and the welding mechanism and the steel pipe fixing mechanism are arranged on the workbench. The steel pipe fixing mechanism comprises a main fixing piece arranged in the middle of the top end of the workbench and auxiliary fixing pieces symmetrically arranged on the two sides of the main fixing piece, the main fixing piece and the auxiliary fixing pieces each comprise a mounting cylinder, and rotating driving pieces used for conducting centering clamping and rotating welding on a steel pipe are arranged on the outer sides of the mounting cylinders. Steel pipes are installed in the corresponding installation cylinders to achieve centering clamping and fixing, the ends, away from each other, of the steel pipes at the two ends are limited through the end limiting mechanisms, and relative displacement between the steel pipes and the clamping pieces is avoided; the welding stability is improved.

The utility model discloses a double-cooling welding gun which comprises a welding gun head, a welding cable connected with the welding gun head and a wire feeding spring located in the welding cable and the welding gun head, the welding gun head comprises a gun shell and a gun neck located in front of the gun shell, and a double-welding-wire contact tube connected with the wire feeding spring is arranged at the front end of the gun neck. A gas insulation pipe and a water insulation pipe connected to the gas insulation pipe in a sleeving mode are installed in the gun neck, a moving space for the wire feeding spring to move is formed in the gas insulation pipe, an air cooling channel is formed between the gas insulation pipe and the water insulation pipe, and a water cooling channel is formed between the water insulation pipe and the inner wall of the gun neck. An air inlet pipe, a water inlet pipe and a water return pipe which are connected to the connector are arranged in the welding cable, so that the cooling effect on the welding gun is improved, and the welding quality is guaranteed.

The invention discloses an electric arc additive manufacturing conformal temperature regulation and control device and method, belongs to the technical field of metal additive manufacturing, and aims to solve the problems of poor molten pool stability, low dimensional precision, serious heat accumulation and the like caused by temperature difference in the electric arc additive manufacturing process. The regulation and control device comprises a cooling device, a heating device, a temperature sensor, a temperature regulation and feedback device and a sliding rail which are assembled through the sliding rail and can keep synchronous movement. In the printing process, the heating device preheats the pre-walking track to enable the pre-walking track to reach a proper printing temperature; the cooling device is used for cooling the formed welding bead in real time; the temperature sensor collects the printing temperature in real time and feeds the printing temperature back to the temperature regulation feedback device, and precise temperature regulation and control are achieved. The method is suitable for additive manufacturing of multiple metal materials such as austenitic stainless steel, martensitic stainless steel and aluminum magnesium alloy, the forming efficiency, the size precision and the forming quality are remarkably improved, and the rejection rate is reduced.

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

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

The present application relates to a kind of welding actuators and track type welding robots, welding actuators include torch assembly, torch transverse angle adjustment assembly, torch swing assembly and torch vertical angle adjustment assembly, set torch transverse angle adjustment assembly, torch vertical angle adjustment assembly jointly drive torch assembly complete the quick and effective adjustment of relative angle of torch and the combined joint to be welded, set torch swing assembly can be small amplitude orderly swing to the welding wire in molten state, to meet the welding action demand and fully guarantee weld forming quality;Track type welding robot includes welding actuators, shell, track mechanism, walking mechanism, walking drive mechanism, lifting mechanism and reinforcing rib plate, can drive welding actuators to adjust welding position in horizontal direction and vertical direction, combined with different working condition requirements, can realize the functional requirements when carrying out structural member flat angle welding.

The invention discloses an automatic welding machine for a valve body, which is used for welding the valve body and comprises a support rotating device for keeping the valve body axially horizontal and driving the valve body to rotate; the welding device is used for welding circular welding seams between the valve body of the valve body and the connecting pipes at the two ends of the valve body; the welding device comprises a welding mechanism. The welding mechanism comprises a welding frame, a welding gun assembly, a welding wire supply assembly and a welding gun adjusting assembly. The welding frame and the valve body are arranged in parallel; the welding gun assembly comprises a welding gun and a welding wire gun; the welding wire supply assembly is used for supplying welding wires to the welding wire gun; the welding gun adjusting assembly is located between the welding frame and the welding gun assembly and used for adjusting the position and the inclination angle of the welding gun relative to the valve body. In the welding process, automatic welding is achieved, manual welding is not needed, the welding efficiency is high, and the production efficiency is high.