1662 results about "Weld zone" patented technology

The invention discloses a defect repair method based on digital twinning and friction stir welding technologies, and relates to the technical field of intelligent manufacturing and digital twinning, and the defect repair method comprises the following steps: synchronously capturing full-dimensional data of a welding area through a multi-mode sensor array integrated by an actuator; secondly, segmenting defect boundaries by adopting a deep learning algorithm, constructing a dynamic twin model in combination with thermal-force field coupling simulation, and accurately mapping defect three-dimensional features; generating a repair track according to the twinborn model, converting the repair track into a robot joint instruction through a curved surface parameterization mapping algorithm, and implanting real-time anti-collision constraint; in the repairing process, based on reinforcement learning control of the material rheological resistance and the temperature gradient, the rotating speed, the advancing speed and the down force of the tool are dynamically adjusted; and after repairing, micro-focus CT scanning is started immediately, actually measured data is compared with twinborn prediction, and when the deviation exceeds a threshold value, a re-repairing process is triggered automatically. The method solves the problems that a traditional method depends on manual intervention and the precision of a sensor is easily interfered by the environment.

The invention discloses a multi-mechanical-arm space-time synchronization control method for coiled pipe welding, and belongs to the technical field of automation control, and the method comprises the steps: in a primary laser and TIG hybrid welding execution stage, carrying out real-time data acquisition on a welding area of a workpiece, carrying out real-time deviation detection, and once real-time welding deviation is detected, carrying out time-space synchronization on the welding area of the workpiece; a local correction mechanism is triggered immediately, and deviation is prevented from being accumulated in the single welding process; after one-time welding is completed, the workpiece enters a transition area, global contour reconstruction is conducted on a welded section of the workpiece through three-dimensional scanning equipment, global deviation recognition is conducted, and unprocessed hysteresis deformation and accumulative errors are covered and corrected in real time; on the basis of the analysis result of the global deviation recognition, double correction is conducted on secondary welding, and cooperative control over space track correction and technological parameter adaptation is achieved; and after secondary welding is completed, the correction effect is evaluated through a double-layer evaluation mechanism, and the stability of the correction process is ensured.

The invention discloses a Busbar welding seam segmentation method and system based on improved YOLOv11, and the method comprises the steps: constructing a Busbar welding seam segmentation model which takes a YOLOv11 model as a reference network, and comprises a backbone network, a neck network, a head network and mask branches; an LSKA module is embedded after each down-sampling stage of the backbone network of the YOLOv11 model; a CIoU loss function in the training process of the YOLOv11 model is replaced by a Focaler-IoU loss function; the LSKA module is used for enhancing the feature sensing ability of the model to a welding seam global structure and a pole small target by linear calculation complexity through a decomposable large kernel convolution structure; and collecting an image of a Busbar welding area, inputting the image into the trained Busbar welding seam segmentation model, and outputting binary masks of the welding seam and the pole. According to the method and the system, feature attention to the welding seam and the pole column area is enhanced, feature extraction of the welding seam area is enhanced, it is ensured that the mask boundary is clear, and wrong segmentation is reduced.

The invention discloses an automatic suction removal method, device and equipment for welding smoke and a medium, and relates to the technical field of machine learning. Linear interpolation and capacity expansion are conducted on a temperature matrix of a welding area; inputting the interpolated and expanded temperature matrix into a decision tree model, outputting predicted position information of the smoke source, and calculating spatial position coordinates; converting the point cloud data of the welding area into a grey-scale map, fusing the grey-scale map and the interpolated and expanded temperature matrix data to obtain a temperature space distribution matrix, inputting the temperature space distribution matrix into a first convolutional neural network, and outputting obstacle avoidance point cloud data; calculating parameters of the obstacle avoidance area, inputting the parameters, the spatial position coordinates and the initial joint rotation angle of the actuator into a second convolutional neural network, and outputting a target joint rotation angle; therefore, the welding smoke in the welding area can be automatically sucked by the actuator, the sucking efficiency is improved, the smoke concentration in the welding working area is reduced, the conflict condition of the smoke sucking disc working area is avoided, and the interference to the welding work and the sucking leakage rate are reduced.

The invention provides a multi-sensor fusion welding temperature monitoring method and a related device, and the method comprises the steps: dividing a welding region into a plurality of sub-regions according to the spatial distribution of the welding region, and obtaining the initial temperature data corresponding to each sub-region according to various temperature sensors; performing time alignment on the initial temperature data through difference resampling of different sampling points to generate a time sequence temperature matrix; performing real-time quality detection on the time sequence temperature matrix to generate a real-time quality score, and performing weighted combination on the real-time quality score and a preset confidence coefficient parameter table to obtain a dynamic confidence coefficient result set; fusing the effective temperature data exceeding a preset confidence threshold in the dynamic confidence result set according to a fusion rule corresponding to each sub-region to obtain a fused temperature result; and the fusion temperature results of the sub-regions are subjected to time sequence splicing to obtain a global temperature curve of the welding process, so that the accuracy of temperature detection in the welding process can be effectively improved.

The utility model provides an adapter piece structure, cell structure and energy storage big battery, adapter piece structure includes tab connecting part and post connecting part, tab connecting part is used for connecting with the tab of cell, post connecting part is connected with tab connecting part, post connecting part has first side, first side has the cleaning area that is used for the cleaning treatment, the first side has the cleaning area that is used for the cleaning treatment, the second side has the cleaning area that is used for the cleaning treatment. The cleaning area comprises a welding area and an annular area surrounding the periphery of the welding area, and the welding area is used for welding and fixing the pole connecting part and the pole of the cover plate, so that the welding area is ensured to be in a clean state before welding, the influence of impurities, oxides and the like on the welding quality is avoided, and the welding strength and reliability are improved; due to the existence of the annular area surrounding the welding area, external pollutants can be prevented from invading the welding area in the welding or connecting process, so that the purity and the stability of connection are improved, and high-quality welding of the pole connecting part and the pole can be ensured.

The invention belongs to the technical field of laser welding, and discloses a multi-parameter cooperative control laser welding method and system.The method comprises the steps that a laser energy control model is established based on material strength-thickness-gap ternary coupling, and the output power of an optical fiber laser is controlled; coaxial three-layer gradient gas is adopted for protection of a welding area, preheating before welding and double-temperature-zone gradient annealing after welding are adopted, the output power of an optical fiber laser and the three-layer gradient gas protection flow are regulated and controlled in real time through combination of multiple sensors and a control algorithm, the temperature of a heat affected zone is monitored in real time, and a cooling nozzle is controlled for cooling. And continuous parameter optimization is achieved through machine learning, and multi-parameter control laser welding is achieved.

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 provides a welding method and device based on sinusoidal modulation Burst mode ultrafast Bessel light, and the welding method comprises the following steps: S1, a first workpiece to be welded is stacked above a second workpiece, optical contact is formed between the first workpiece and the second workpiece, and the first workpiece is made of a transparent material; s2, outputting ultrafast laser by a laser, and performing time and space shaping on the ultrafast laser to form ultrafast Bessel light in a sinusoidal modulation Burst mode; and S3, the light path is adjusted, ultrafast Bessel light in the sinusoidal modulation Burst mode acts on the target welding area, and welding of the transparent material is achieved. According to the method, ultrafast Bessel light in a sinusoidal modulation Burst mode is formed by conducting time and space shaping on ultrafast laser to act on a target welding area, the stable heating and melting process of a transparent material can be achieved, excessive heating of plasma can be greatly avoided, the ultrafast laser energy of an overall injection sample is reduced, and the welding quality of the transparent material is improved. And the welding strength and stability are improved.

The invention discloses a welding defect detection and automatic repair welding system, which comprises a repair welding execution module, a welding point cloud extraction module, a welding defect extraction module and a defect identification and classification module, and is characterized in that the welding point cloud extraction module is in signal connection with the repair welding execution module; complete point cloud data of a welding area are visually collected through the repair welding execution module, a target area is accurately extracted through the welding point cloud extraction module, and then efficient extraction and contour positioning of welding defects are completed through the welding defect extraction module based on point cloud feature analysis. Accurate identification and multi-type classification of defects are achieved through a defect identification and classification module, finally, six-dimensional coordinates of repair welding track points under a camera coordinate system are obtained through a repair welding instruction calculation module, and then a hand-eye calibration matrix, a tool calibration matrix and a transformation matrix between a wrist joint coordinate system and a base coordinate system are combined, so that the repair welding precision is improved. And through multi-coordinate system collaborative conversion, the six-dimensional pose of the repair welding track point of the mechanical arm welding gun is solved, and equipment is driven to complete repair welding operation.

The invention relates to the technical field of image processing, and discloses an intelligent detection method for high-precision welding of an aircraft aluminum condenser, which comprises the following steps: acquiring an image of a to-be-detected welding area and preprocessing to obtain a welding area sub-image; calculating a gradient magnitude graph and a local formal dimension graph; the product of the pixel gradient value and the corresponding pixel value is used as a composite density function, and the composite density weighted Zernike moment of each order is calculated; the composite density weighted Zernike moment of each order is adjusted, and a direction enhanced composite Zernike feature is generated; carrying out convolution on the sub-image of the welding area to generate a group of Gabor energy feature maps, and calculating multi-scale Gabor-Hu texture features; and fusing the Zernike features with the multi-scale Gabor-Hu texture features to form a high-dimensional composite feature vector, and inputting the high-dimensional composite feature vector into a pre-trained classification model to output a quality detection category of the welding area. According to the method, the gradient amplitude is combined with the local shape dimension, so that the Zernike moment can simultaneously describe the macroscopic contour and the microscopic details of the welding seam, and the accuracy of welding defect detection is improved.

The invention discloses a multi-station clamping tool for laser welding and a temperature control method of the multi-station clamping tool, and relates to the technical field of clamping tools, the multi-station clamping tool comprises a rack, a moving mechanism and a driving mechanism, a controller is installed on one side of the rack and used for controlling the clamping tool, the bottom of the rack is connected with the moving mechanism, and the moving mechanism is connected with the driving mechanism. The number of the moving mechanisms is two, one moving mechanism is connected with the driving mechanism, in the welding process, when a steel pipe rotates, a welding seam makes contact with a rolling shaft, if the welding seam is too thick, the rolling shaft can move upwards, an infrared sensor is triggered to detect the change of a displacement threshold value, and therefore an operator is reminded to conduct treatment in time, and the welding quality is ensured; external high-temperature and high-pressure gas is injected into the steel pipe through the second plug, heating and heat preservation are conducted on a welding area through the heat conduction effect of the gas, the situation that a welding seam is rapidly cooled due to the low environment temperature is prevented, cracks are avoided, and therefore the welding efficiency and quality are effectively improved.

The invention provides a welding quality evaluation method, an industrial camera and related equipment, and relates to the technical field of welding detection. The method comprises the following steps: acquiring a multispectral image of a welding area, wherein the multispectral image at least comprises a visible light image and a near-infrared image; multi-spectrum fusion processing is conducted on the visible light image and the near-infrared image, and a fusion image containing welding information in the welding area is generated; and performing quality evaluation on the welding information in the fused image according to a pre-trained quality evaluation model. According to the method and the device, the problems of incomplete information, large interference by a complex environment and low evaluation precision and efficiency in an existing welding quality evaluation technology are solved, the efficiency of welding quality detection is improved, and the effect of comprehensively and accurately evaluating the welding quality is achieved.

The invention discloses a laser welding method for a copper-aluminum composite material, which comprises the following steps of: performing upsetting thinning treatment on a three-layer sandwich structure base material to ensure that the total thickness of a welding area is 1.5 mm, the thickness of an aluminum layer is 0.9-1.1 mm (the deformation rate is 10-30%), the thickness of a copper layer is 0.2-0.3 mm, the surface roughness Ra is less than or equal to 1.6 mu m, and the surface roughness Ra of an oxide layer is less than or equal to 5 mu m; a 1064nm optical fiber laser is adopted, welding is conducted at the power of 85%-95%, the speed of 120-150 mm / s and the frequency of 4000-6000 Hz, the fusion depth is 0.3-0.6 mm, and the fusion width is 1.2-2.0 mm. By means of the method, the tensile strength of the connector can be larger than or equal to 110 MPa, the resistivity is smaller than or equal to 2.5 * 10 <-8 > omega.m, the problems that traditional welding strength is low and conductivity is poor are solved, batch quality consistency is ensured, and the method is suitable for the fields of new energy automobiles and the like.

The invention discloses a production line for forklift portal frame welding and a control method. The production line comprises an assembling area, an on-line conveying line, a double-layer conveying line, a welding area, a carrying robot, a welding workstation, an RGV trolley and an off-line conveying line. The assembling area is arranged on the side edge of the on-line conveying line and used for manually assembling the inner door frame, the middle door frame and the outer door frame and pasting product information codes at set positions. The double-layer conveying line and the upper conveying line are arranged in parallel, and the portal frame is transferred to the double-layer conveying line through the translation mechanism. A carrying rail is arranged, so that the RGV trolley and the carrying robot are arranged on the same rail, the portal corresponding to the to-be-welded area is transferred to an RGV feeding position through the RGV trolley, and the carrying robot is matched for feeding; the multiple welding workstations are arranged in the welding area, the fed portal frame is clamped, welding seams are welded, and after welding is completed, the carrying robot carries the welded portal frame to the off-line conveying line. According to the invention, the automation and intelligence level of the forklift production line can be improved.

The invention discloses anti-deflection circuit board welding equipment for integrated circuit board processing and a control method, and relates to the technical field of integrated circuit board processing. The multi-point dynamic supporting subsystem is arranged on the bearing base and comprises a plurality of supporting units which are arranged in an array mode; the multi-modal sensing subsystem is arranged on the bearing base and corresponds to the multi-point dynamic supporting subsystem; the intelligent prediction control subsystem is electrically connected with the multi-point dynamic support subsystem and the multi-modal sensing subsystem; and the control subsystem is used for predicting the deformation trend of the circuit board and controlling each supporting unit of the multi-point dynamic supporting subsystem to independently move so as to form a supporting curved surface for compensating the buckling deformation of the circuit board. Through cooperative work of real-time monitoring, advanced prediction and dynamic compensation, passive correction is changed into active intelligent correction. Dynamic deformation caused by welding thermal stress can be actively counteracted, a welding area is kept at extremely high flatness, and the welding yield and the equipment reliability are fundamentally improved.

The invention discloses a furnace roller shaft head and roller welding and positioning tool, and relates to the technical field of furnace roller welding and positioning. The furnace roller shaft head and roller welding and positioning tool comprises a support, a bearing box base is installed on the upper end face of the support, a conversion part is installed on the bearing box base, and a clamping and guiding part used for clamping a furnace roller shaft head to move in a self-centering mode so that the furnace roller shaft head can be inserted into a roller conveniently is installed on the conversion part. The upper end face of the supporting plate is fixedly connected with a limiting column abutting against the inner wall of the bearing box base, and the upper end face of the bearing box base is provided with a bearing part used for bearing a roller and conducting self-positioning on the roller. The clamping sleeve base drives the clamping guide moving part and the sleeve clamping part to synchronously move along the C-shaped guide groove, and rapid positioning and centering of shaft heads at the two ends in the same station are achieved; and then a local protective atmosphere is formed in the welding area through the sleeve pressing part, cold cracks are prevented, meanwhile, flexible limiting and dynamic pressure maintaining can be carried out on the welding area, thermal deformation is automatically compensated, positioning is enhanced, and meanwhile the welding precision is ensured.

The present invention relates to the technical field of batteries, and discloses a battery and a battery pack, the battery comprises: a battery cell comprising a battery cell body and a tab part extending from the battery cell body; the pole assembly is welded with the tab part to form a first welding mark area, and a non-welding area is formed on the part, without the welding mark, of the tab part; the tab part comprises a plurality of tab layers which are stacked in the z direction, the surface roughness of the tab layers is R, the orthographic projection area of the first welding printing area on the tab part in the z direction is S, the thickness of the non-welding area in the z direction is T1, the thickness of the first welding printing area is T2, and the formula that (T2 * R) / (T1 * S) is larger than or equal to 1.4 * 10 <-6 > and smaller than or equal to 5.4 * 10 <-5 > is met. According to the invention, the over-current capability between the pole assembly and the tab part is ensured, the charging and discharging rate of the battery is improved, the voltage jump of the battery is avoided, the reliability of the battery is ensured, the welding strength of the tab part and the pole assembly is improved, the difficulty degree of the welding process is reduced, and the welding efficiency is ensured.

The invention provides a femtosecond and picosecond composite laser welding method and equipment for heterogeneous materials. The femtosecond and picosecond composite laser welding method specifically comprises the steps that glass and metal are stacked on a three-dimensional motion platform and clamped through a clamp; femtosecond laser (with the pulse width of 50-1000 fs and the peak power density of 10-10 W / cm) and picosecond laser (with the pulse width of 1-200 ps and the peak power density of 10-10 W / cm) are adjusted by different beam expanding systems, and after focusing, picosecond light spots completely wrap femtosecond light spots; the composite laser acts on a welding area and a femtosecond laser focusing interface in a time-space synchronization mode, plasma is excited to enable metal to be melted to fill gaps, picosecond laser forms a wide-area heating field on the femtosecond periphery, a violent temperature gradient is regulated and controlled to be in a gentle state, the preheating and after-heating effects are achieved, cracks are restrained, absorption is enhanced, and the welding strength is improved; and the composite laser is controlled by a control system to weld according to a specified path, so that high-strength connection of the glass / metal heterogeneous materials is realized. And the method becomes a breaking key for regulating and controlling the temperature gradient, inhibiting crack generation and improving the welding strength.

The invention relates to an inner cavity curved surface welding line laser light path turning welding method which is used for solving the technical problem that an existing welding method is difficult to operate when curved surface welding is carried out in an inner cavity, and the method comprises the steps that a reflecting mirror is arranged on a light emitting path of a laser welding head, and original laser beams are deflected; the laser beam enters the inner cavity space and irradiates the to-be-welded area of the curved surface weld joint; surface cleaning and fixing are conducted on a to-be-welded area, and the folded laser beams are focused to the center of a welding seam; enabling the laser beam to perform scanning welding on the curved surface welding seam according to a preset scanning track; in the welding process, protective gas is jetted to the position, acting on the workpiece, of the laser beam so as to blow away welding spatter and provide gas protection for a welding seam. The propagation direction of laser beams is changed through the reflecting mirror, so that laser can enter the inner cavity to weld a curved surface weld joint, the application range of laser welding is expanded, and the problem that curved surface welding is difficult to operate in the inner cavity space through an existing welding method is solved.

The invention provides a pipe fitting laser welding machine and a using method thereof, and relates to the technical field of laser welding, the pipe fitting laser welding machine comprises a base, two side fixing plates are symmetrically and vertically fixed to the two sides of the top of the base, a motor is fixed to the outer sides of the side fixing plates through mounting supports, and the axial part of an output shaft of the motor is located in the side fixing plates and rotationally mounted; an auxiliary structure is coaxially fixed at the end part of an output shaft of the motor; the auxiliary structure comprises a long shaft, by arranging the auxiliary structure, when a worker starts the motor to drive the pipeline to rotate and convey inert gas, the gas conveying pipe can stably convey gas to the four-way converging pipe, then the gas is conveyed to a welding area through the stretchable flexible exhaust pipe, and meanwhile the gas conveying pipe is matched with rotation of the turbulent flow main shaft; therefore, uniform distribution of the inert gas in the welding area can be achieved, a stable protection atmosphere is provided for welding, the diffusion mode is that the inert gas diffuses from the interior of the pipeline to the weld joint and can directly act on a welding pool and a nearby high-temperature area, and the stability of welding quality is ensured.

The invention discloses an automatic welding method, device and equipment, a storage medium and a product, and relates to the technical field of welding automation. According to the method, the three-dimensional point cloud data and the two-dimensional image data of the welding area are collected, the three-dimensional point cloud data and the two-dimensional image data are fused, and the fused image is obtained. The rough welding area is determined through semantic segmentation based on the two-dimensional information contained in the fused image, and the target welding seam is determined in the rough welding area based on the depth information contained in the fused image, so that the precision and robustness of welding seam positioning are remarkably improved by utilizing the characteristics of the fused image; the system can stably operate in a complex factory environment with uneven illumination, strong reflection or partial shielding; and the dependence of the algorithm on environmental conditions is reduced, so that the algorithm is more suitable for the application scene of an actual manufacturing industry factory. And on the basis of more accurate positioning, the welding gun is controlled to weld the target welding seam, and the accuracy of automatic welding can be remarkably improved.

The invention relates to the technical field of continuous wave soldering, in particular to selective continuous wave soldering equipment based on electronic components, which comprises a base, a conveying unit, a soldering unit, a guide component and an auxiliary component. According to the welding device, firstly, the upper die base and the lower die base are closed and locked, a welding area is accurately opposite to the nozzle by means of the guide assembly, the welding quality and welding efficiency of follow-up welding are ensured, and batch rapid production is facilitated; the upper die base and the lower die base serve as first-stage covering protection, and the guide assembly limits the height of the nozzle; the tin solution is cooled before welding to form second-stage temperature protection, then third-stage protection is formed by means of nitrogen filling in in the welding process, fourth-stage protection is formed through preheating and cooling protection in the auxiliary assembly, in conclusion, through the four-stage temperature protection, the problem that components are damaged due to high temperature is solved, and the welding quality is improved.

In a method of using ultrasonic welding for fusion bonding of thermoplastic composites, an energy director is formed in place on a first thermoplastic substrate. The energy director can be protrusions arranged in a grid pattern over the entire weld region. The energy director can have protrusions of varying thicknesses to account for unevenness along the weld interface. Forming the energy director can be carried out by placing thermoplastic film on the first thermoplastic substrate, melting the thermoplastic film, and stamping the thermoplastic film with an energy director stamp. After the energy director is formed, the first thermoplastic substrate is ultrasonically welded to a second thermoplastic substrate with the energy director sandwiched between the first and second thermoplastic substrates.

The invention provides a photovoltaic solder strip, a solar cell string, a welding method of the solar cell string and a photovoltaic module, the photovoltaic solder strip comprises a solder strip base body, the solder strip base body is provided with a welding area, the outer surface of the solder strip base body is coated with a passivation layer, and the passivation layer is arranged on the outer surface of the solder strip base body. A conductive tin layer is arranged on at least part of the surface of one side, far away from the photovoltaic welding strip, of the passivation layer corresponding to the welding area, the conductive tin layer comprises fluoride or phosphide, the conductive tin layer corrodes the passivation layer after being heated to form a connecting through hole, and the conductive tin layer permeates into the connecting through hole to be in butt joint with the welding strip base body. The invention has the advantages of low cost, strong conductivity, good light collection effect and long service life.

A kind of method for melting pole twisted wire arc magnetic spin control welding.The prior art twisted wire welding is prone to produce blowhole in weld inside when large current welding, and excessive heat input will cause changes in structure and performance in joint area, such as problems of weld zone grain growth, joint plasticity, toughness and other mechanical properties decline, etc.The present application comprises: twisted wire welding electrode arc welding point, a coaxial coil is arranged around the twisted wire welding electrode arc welding point, direct current is passed into the coaxial coil to form longitudinal magnetic field, the force direction of longitudinal magnetic field on twisted wire welding arc should be consistent with the self-rotating direction of twisted wire welding arc, and opposite to the twisting direction of twisted wire, the direction of longitudinal magnetic field is controlled by the direction of direct current, while twisted wire melts to form its own twist angle release, the twist angle release is affected by Lorentz force to make the rotational angular velocity of twisted wire welding arc rapidly increase, to realize high-speed directional rotation of twisted wire welding arc.The present application is used for melting pole twisted wire arc magnetic spin control welding method.

The utility model relates to the technical field of yacht production, in particular to a yacht protective guardrail welding auxiliary device which comprises a base, an end supporting mechanism, a supporting rod, a clamping block, a handrail, a limiting mechanism and a connecting rod, the end supporting mechanism and the supporting rod are fixedly arranged on the upper surface of the base, and the clamping block is fixedly arranged at the top end of the supporting rod. The handrail is clamped at the top of the clamping block, the limiting mechanism is arranged on the upper surface of the base, the connecting rod is clamped in the limiting mechanism, the limiting mechanism comprises a sleeve, a telescopic rod, a mounting strip, a clamping strip, a limiting pipe and a clamping seat, and the telescopic rod is clamped at the inner side of the top of the sleeve; according to the yacht protection guardrail welding auxiliary device, after a guardrail is effectively positioned and installed, a connecting rod needing to be welded is arranged at the top of a handrail, effective positioning is conducted according to the welding position, and therefore it is guaranteed that the connecting rod is vertically welded to the surface of the handrail, a welding area is located on the front face of the handrail, operation is convenient, and the welding quality can be effectively improved.

The application provides a multi-wire submerged arc welding method and device for straight-seam steel pipes, and belongs to the technical field of welding. The method comprises the following steps: adopting a multi-wire submerged arc welding process to perform double-sided submerged arc welding on a straight-seam steel pipe, and when welding an outer weld, an ultrasonic auxiliary device arranged at the back of a molten pool generates ultrasonic waves and inputs the ultrasonic waves into the molten pool through a horn, so that the formation of intergranular ferrite in the weld zone is inhibited, the content of intragranular acicular ferrite is increased, and the toughness and hydrogen brittleness resistance of the weld zone are improved. The device comprises a three-wire submerged arc welding device, an ultrasonic auxiliary device and a telescopic cantilever beam; the ultrasonic auxiliary device is installed at the front end of the telescopic cantilever beam and comprises three ultrasonic transducers arranged side by side; a horn is installed at the output end of the ultrasonic transducer; the ultrasonic transducer generates ultrasonic waves and inputs the ultrasonic waves into the molten pool through the horn. The application solves the problems that the existing ultrasonic auxiliary arc welding cannot control the content of acicular ferrite and the effect of reducing residual stress in the weld zone is not obvious.

The invention relates to the technical field of track repairing, in particular to a track polishing device with a built-in adjusting mechanism. The grinding mechanism and the guide plate are arranged on the frame in a sliding mode in the length direction of a track, the grinding mechanism comprises a power system, a telescopic shaft connected with the power system and a grinding wheel coaxially and fixedly connected with the telescopic shaft, and an adjusting arm abutting against the top of the guide plate is arranged on the telescopic part of the telescopic shaft; the top of the guide plate is provided with a first guide face corresponding to a welding slag area and a second guide face corresponding to a welding area. The first guide face and the second guide face are located at different heights in the initial state, so that the grinding wheel only makes contact with part of a welding spot in an upward moving mode when moving to a welding area, then the adjusting piece is matched to adjust the height of the second guide face, and the welding spot can be ground through reciprocating motion in the grinding process. And the height of the second guide surface is gradually reduced, so that welding spots are gradually polished in the reciprocating movement process.

The utility model belongs to the technical field of electromagnetic pulse welding, and particularly relates to a magnetic pulse welding device based on welding area maximization, a coil is arranged in a base, one surface of the base is used for arranging a flying plate and a supporting block and is provided with a through groove, and the working surface of a welding working area is in a concave arc shape and is arranged towards the through groove; the supporting block is used for supporting a workpiece with curvature, and the fixing structure is used for fixing the flying plate and the workpiece with curvature; during welding, the generatrix of the to-be-welded area of the workpiece with the curvature is parallel to the generatrix of the working face of the welding working area, and the to-be-welded area of the workpiece with the curvature coincides with the working face of the welding working area in the projection direction from the workpiece with the curvature to the welding working area. According to the utility model, the collision point position and the collision angle of the flying plate and the workpiece with curvature can be improved, the effective connection area of the welding area of the flying plate and the workpiece with curvature is increased, the excessive melting of an interface is avoided, and the strength of a welding joint is effectively improved.