49212 results about "Welding" patented technology

The invention provides a dissimilar material crystallization welding control method based on microwave energy distribution, which comprises the following steps: acquiring a high-density temperature map of a to-be-welded workpiece through a fiber grating array, and acquiring a real-time temperature value from a dissimilar material interface edge to a central area of the to-be-welded workpiece to obtain initial temperature distribution; calculating a temperature difference value between the edge and the central area, identifying a local overheat point position by comparing a temperature gradient or setting a temperature difference threshold value, and comparing the overheat point temperature with a preset material overheat threshold value to judge whether an overheat area exists or not; if the temperature difference value exceeds a temperature difference threshold value or a local overheating area exists, extracting space coordinates of a low-temperature area and a high-temperature area from the high-density temperature map, and identifying an energy distribution target area needing to be adjusted; and extracting temperature distribution from the updated energy distribution diagram, analyzing a temperature gradient to identify a heating power concentration region, and calculating to obtain a target stress distribution state in combination with the heating power concentration region.

The invention, which relates to the industrial circuit board monitoring technology field, discloses an industrial circuit board operation abnormity monitoring system comprising a multi-sensor welding spot data acquisition module, a signal processing module, an element welding spot mechanical fatigue monitoring module, a welding spot fatigue fault grading early warning module, and an early warning and response module. Data fusion is carried out on the acoustic emission sensor, the strain gauge sensor and the ultrasonic sensor, the state of the welding spot is monitored synchronously from three dimensions of stress acoustic emission, mechanical deformation and internal defects, the strain gauge sensor captures tiny deformation around the welding spot, and the ultrasonic sensor detects internal potential defects. The acoustic emission sensor senses stress release signals, the three kinds of sensor data are subjected to deep fusion analysis through the D-S evidence theory, the problem of misjudgment caused by one-sided information is effectively avoided, stress waves during crack propagation are captured through the acoustic emission signals, and faults can be diagnosed in time in combination with deformation data of the strain gauge sensor.

The invention relates to the technical field of welding equipment, and particularly discloses steel reinforcement framework welding equipment which comprises a machine body, a positioning mechanism, a welding mechanism and two clamping mechanisms are arranged on the machine body, and the two clamping mechanisms are used for clamping two steel reinforcements and driving the steel reinforcements to ascend and descend relative to the machine body; the positioning mechanism comprises a driving assembly and two positioning pieces, the two positioning pieces are arranged in parallel, the driving assembly drives the two positioning pieces to synchronously get close to or get away from each other, fixing parts are arranged on the positioning pieces and used for movably abutting against the lap joint sections of the reinforcing steel bars, and the driving assembly is rotationally matched with the machine body through elastic pieces; and the welding mechanism is installed on any positioning piece, the welding mechanism comprises a support, a moving assembly and two welding pieces, the two welding pieces are installed on the support, the moving assembly drives the support to be in sliding fit with the positioning pieces, and the welding equipment improves the efficiency and the welding effect of lap welding of the reinforcing steel bars.

The invention provides an array detection and positioning method combined with multi-welding-head battery welding, which comprises the following steps: monitoring the distribution of a welding head temperature field in real time by adopting an infrared thermal imaging technology, judging whether the welding head temperature field deviates or not by combining a preset temperature threshold value, and judging that the welding head temperature field deviates if detecting that the temperature of a certain welding head exceeds a threshold value range; according to the offset of the welding position, motion control parameters of the digital welding system are adjusted in a self-adaptive mode, and the offset error of a welding head is compensated in real time through a closed-loop feedback control algorithm; the welding spot quality online monitoring technology is adopted, the welding spot fusion depth and the welding spot diameter are extracted, whether the welding spot quality is qualified or not is judged in real time in combination with a pre-established welding spot quality evaluation model, and if the quality of a plurality of continuous welding spots is not qualified, it is judged that the welding spot quality is affected by welding head temperature field deviation.

The invention discloses a photovoltaic module and a photovoltaic module preparation method, the photovoltaic module comprises a battery piece, a welding strip, a bus bar and an insulating block, and the back surface of the battery piece is provided with a fine gate electrode and a first insulating layer; the first welding strip is electrically connected with the fine gate electrode with the first polarity, and the second welding strip is electrically connected with the fine gate electrode with the second polarity; the insulating blocks are located on the back face of the battery piece, the insulating blocks and the first insulating layers are alternately arranged in the extending direction of the fine gate electrodes, and the insulating blocks cover part of the fine gate electrodes of the second polarity and part of the second welding strip; the first insulating layer covers part of the fine gate electrode with the second polarity; the bus bar is located in the area, corresponding to the first insulating layer and the insulating block, of the back face of the battery piece, the bus bar extends in the length direction of the fine grid electrode, the bus bar is electrically connected with the first welding strip, and the bus bar is electrically isolated from the second welding strip through the insulating block; and the bus bar is electrically isolated from the fine gate electrode with the second polarity through the insulating blocks and the first insulating layers which are alternately arranged.

The invention relates to the technical field of pressure steel pipe stiffening ring welding, in particular to a hydraulic engineering pressure steel pipe stiffening ring welding machine which comprises two fixed bottom plates arranged in parallel and a sliding bottom plate installed between the two fixed bottom plates in a sliding mode. The upper portion of the right side of the sliding bottom plate is connected with a first adjusting seat through a hydraulic cylinder, and two clamping assemblies used for clamping the inner walls of the two ends of the pressure steel pipe are installed on the outer side of the supporting column at equal intervals. A first clamping mechanism used for clamping the outer side of one end of the pressure steel pipe is fixed to the outer side of the right end of the supporting column, and the supporting column is arranged over the sliding bottom plate. Supporting roller assemblies used for lifting and limiting the lower portion of the pressure steel pipe are symmetrically installed above the sliding bottom plate. According to the hydraulic engineering pressure steel pipe stiffening ring welding machine, a pressure steel pipe can be horizontally moved to adjust the welding position only by pushing the sliding bottom plate, the pressure steel pipe does not need to be separated from the supporting roller assemblies, operation is convenient, and time and labor are saved.

The invention relates to the technical field of welding fixing devices, and discloses a metal machining welding fixing device which comprises a base, a welding machine is fixedly mounted at the top of the base, a motor is fixedly mounted at the bottom of the base, and a fixing mechanism is arranged at the top of the base. A first clamping plate is driven by a motor to move to clamp a welding part, the situation that deviation occurs when the welding part is welded, and consequently the welding part is damaged is prevented, the working efficiency of equipment is improved, the welding speed is higher, alignment is more accurate, the welding stability of the welding part is improved, and the quality of the welding part is better; when the welding part is clamped, the first sliding plate drives the second clamping plate to move to elastically clamp the welding part, deviation of the welding part is avoided, the welding precision of the welding part is improved, the welding quality of the welding part is better, and the overall working efficiency of equipment is improved.

The invention discloses a welding device for switch cabinet production, which belongs to the technical field of switch cabinet production and comprises a support base, a transverse clamping and sliding mechanism, a longitudinal clamping and sliding mechanism and a diagonal follow-up self-adjusting positioning mechanism. The transverse clamping and sliding mechanism and the longitudinal clamping and sliding mechanism are arranged on the side wall of the sliding drive, the transverse clamping and sliding mechanism and the longitudinal clamping and sliding mechanism are perpendicular to each other, and the sliding drive is in transmission connection with the transverse clamping and sliding mechanism and the longitudinal clamping and sliding mechanism. According to the welding device for switch cabinet production, a plurality of metal plates are stably clamped, meanwhile, the anti-deviation welding mechanism is automatically aligned with the abutting joint gap of the two metal plates, plates can be automatically supported and positioned at the same time from the inner side and the outer side during welding according to switch cabinets with different sizes and design requirements, and the welding efficiency is improved. And dislocation and offset are avoided.

The utility model relates to the technical field of solar cells, and provides a main-grid-free electrode structure, an IBC solar cell sheet, a cell assembly and a photovoltaic system, in the IBC solar cell sheet, a first connection grid line and a second connection grid line are arranged at a first disconnection area, the first connection grid line and the second connection grid line are not contacted with a first fine grid, and the second connection grid line is not contacted with a second fine grid. The first connecting grid line and the second connecting grid line are connected with the part, closest to the third edge, of the second fine grid, and the first end welding point is arranged between the first connecting grid line and the second connecting grid line and makes contact with the first connecting grid line and the second connecting grid line. Therefore, when the welding strip is subsequently welded with the first end part welding point, due to the arrangement of the first connecting grid line and the second connecting grid line, the risk of hidden cracks during welding can be reduced, the yield of the battery piece is improved, and meanwhile, the overall convergence of the second fine grid can be realized.

A friction stir additive welding screw is provided. In one aspect, the friction stir additive welding screw includes a first portion configured to be coupled to a friction stir additive welding device, and a second portion configured to penetrate a work-piece. The second portion includes a plurality of large threads, each large thread extending in a generally longitudinal direction. The second portion also includes a plurality of fine threads positioned along an edge of each large thread, and a plurality of teeth at a tip of second portion.

The invention relates to the technical field of aero-engine welding, in particular to a clamp and method for a combustion chamber casing welding mounting base. The clamp comprises a bottom plate and a positioning ring arranged on the top surface of the bottom plate; a positioning spigot is formed in the top surface of the positioning ring and is used for positioning an inner hole of a flange edge at the lower end of the combustion chamber casing; a plurality of pressing hooks are uniformly distributed on the positioning ring close to the edge; a plurality of supporting columns are arranged on the top face of the bottom plate, and a jacking air injection device is arranged on the top of each supporting column and used for jacking an inner molded surface, corresponding to the welding portion of the mounting base, of a barrel of the combustion chamber casing and injecting inert gas to the inner molded surface of the jacking portion. By means of the clamp and the method, deformation of the combustion chamber casing welding installation base is effectively controlled, the stability of the product welding quality is improved, the welding clamp is easy and convenient to operate, the welding method is efficient, and the labor intensity of operators is relieved.

The invention discloses a mechanical arm welding detection intelligent diagnosis method and system based on laser ultrasonic guided waves. According to the system, a high-precision multi-degree-of-freedom steering engine, an infrared distance measurement array, a temperature sensor, a laser vibration exciter and a laser vibration meter are integrated at the tail end of a mechanical arm, synchronous operation of welding and online detection is achieved by presetting a welding track, and the system collects an excitation signal, a reflection ultrasonic signal and temperature data through a high-speed data collection card; and the signal is preprocessed through a temperature matching model, phase compensation and baseline correction. Then, wavelet decomposition is adopted to extract time-frequency features, intelligent diagnosis is achieved through a pre-trained one-dimensional convolutional neural network, a dynamic threshold value is set based on the 3 sigma criterion, and recheck feedback is automatically triggered when detection data exceed the limit, the welding detection efficiency and precision are remarkably improved through the scheme, data closed-loop management and intelligent quality tracing are achieved, and the reliability of welding detection is improved. And the automatic production requirement of modern steel structure manufacturing is met.

The invention provides a welding equipment state monitoring method and device based on artificial intelligence, relates to the technical field of artificial intelligence and data processing, and obtains a vibration data flow corresponding to target welding equipment by collecting vibration signals generated in the operation process of the target welding equipment in real time. And time-frequency energy distribution corresponding to the vibration data flow is determined, and energy changes of the signals in two dimensions of time and frequency are revealed, so that the signal-to-noise ratio of the signals is enhanced, non-correlation frequency band interference is reduced, early fault signals are enhanced, and the sensitivity of the model to abnormal events is improved. Rapid change features and stable structure features in the to-be-identified data are extracted by adopting a preset dynamic gating attention mechanism through a deep residual neural network, so that the rapid change features and the stable structure features can be distinguished and weighted, and the sensitivity of the model to abnormal events (such as early fault impact) is improved; therefore, accurate equipment state analysis is carried out on the welding equipment.

The invention discloses an automatic welding system based on steel structure connection, and relates to the technical field of welding. The welding manipulator is arranged on the rack; two clamping mechanisms; two feeding mechanisms; a driving mechanism; the process that the rotating shaft rotates in the first direction has a discharging stroke, a steel pipe feeding stroke and a clamping stroke. The rotating shaft has a butt joint stroke and a reset stroke in the process of rotating in the second direction. Through rotation of the rotating shaft in the first direction, discharging of welded steel pipes is achieved, the feeding mechanism is driven to feed the to-be-welded steel pipes, the two clamping mechanisms clamp the to-be-welded steel pipes on the two sides correspondingly, and after clamping is completed, the two to-be-welded steel pipes are overturned by 180 degrees so that the two to-be-welded steel pipes can be located between the two clamping mechanisms; and the rotating shaft rotates in the second direction to drive the two clamping mechanisms to get close to each other, so that the two to-be-welded steel pipes are driven to get close to each other and abut against each other, and the welding action of the steel pipes is completed by the welding manipulator.

The invention discloses an automatic welding method and system based on a collaborative robot, and the method comprises the steps: collecting and preprocessing three-dimensional point cloud data of a to-be-welded steel part and the collaborative robot, and collecting thermal physical property data of to-be-welded steel; based on the three-dimensional point cloud data and the thermophysical property data of the steel, a welding simulation model is constructed through the digital twin technology; constructing a welding quality evaluation model based on a deep learning technology, and performing a virtual welding test by using the welding simulation model and the welding quality evaluation model to obtain an optimal welding route and optimal welding parameters; and based on the optimal welding route and the optimal welding parameters, the collaborative robot is started to conduct automatic welding. The invention relates to the technical field of automatic welding, and solves the technical problem that an existing automatic welding technology lacks welding parameter self-adaptive optimization and welding route intelligent planning through combination of a digital twinning technology and a deep learning technology.

The invention discloses a splicing and welding device for industrial pipeline machining, and relates to the technical field of pipeline machining, the splicing and welding device comprises a base, a rotary table rotationally connected to the top of the base and a laser welding machine mounted at the top of the base, and further comprises a main pipe positioning mechanism mounted at the top of the rotary table and used for positioning a to-be-welded main pipe; the branch pipe positioning mechanism is mounted at the top of the rotary table and is used for positioning a branch pipe to be welded; the automatic butt joint mechanism is installed on the rotary table, matched with the branch pipe positioning mechanism and used for driving the branch pipe to move to be in butt joint with the main pipe; the active adjusting mechanism is connected with the main pipe positioning mechanism and used for driving the main pipe to rotate back and forth when the branch pipe moves; according to the splicing and welding device for industrial pipeline machining, through automatic butt joint treatment of the main pipe and the branch pipes, the butt joint time of the branch pipes before splicing and welding is effectively shortened, the problem that in the prior art, the manual butt joint time is long is solved, and then the pipeline splicing and welding efficiency is effectively improved.

The invention discloses a copper alloy pipe and a preparation method and application thereof, and the copper alloy pipe comprises the following components in percentage by mass: 0.01%-0.80% of Sn, 0.005%-0.05% of P, 0.01%-0.10% of Zr, 0.001%-0.01% of B, 0.001%-0.01% of Mn and the balance of Cu and inevitable impurities. Wherein the copper alloy pipe contains MnZr and BMn compound particles, the number of the MnZr compound particles on the cross section of the copper alloy pipe is 0.005-0.15 / mu m < 2 >, and the number of the BMn compound particles on the cross section of the copper alloy pipe is 0.005-0.2 / mu m < 2 >. By adding Zr, B and Mn and controlling the content of Zr, B and Mn, the preparation process and the like, the number and uniformity of MnZr and MnB compounds are regulated and controlled, and the tensile strength, ductility, corrosion resistance, bending, flaring, welding, pressure resistance and other machining performance of the copper alloy pipe are improved; and the prepared copper alloy pipe fully meets the application requirements of heat conduction pipes of air conditioner heat exchangers, air conditioner indoor and outdoor unit connecting piping and the like.

The invention relates to the technical field of steel box girder welding, and particularly discloses a steel box girder welding device and method.The steel box girder welding device comprises a platform, a movable frame body and a welding mechanism, the movable frame body is provided with a bearing frame, and the bearing frame is provided with a rolling assembly and a first driving assembly for driving the rolling assembly to abut against the top face of a U-shaped rib of a steel box girder; the bearing frame is provided with two symmetrically-distributed clamping assemblies and a second driving assembly for driving the clamping assemblies to abut against the two side faces of the U-shaped rib, each clamping assembly comprises a mounting frame and a clamping plate connected to the mounting frame, a crawler belt is arranged on the periphery of each clamping plate, and the mounting frame is provided with a third driving assembly for driving the crawler belt to rotate; the third driving assembly drives the crawler belt to rotate to be matched with the moving speed of the moving frame body, so that sliding friction does not occur between the crawler belt and the U-shaped rib. According to the steel box girder welding device and the welding method, the abrasion of the U-shaped rib caused by sliding friction is avoided, and the stability of the moving process of the movable frame body and the continuous proceeding of the welding operation are ensured.

An automatic welding production line for a large complex workpiece includes a base station, a welding robot, a displacement worktable, an auxiliary robot, a feeding system and a blanking system. The displacement worktable has multi degrees of freedom, the position and angle of the workpiece can be flexibly adjusted during welding to meet the welding requirements of any position and angle of the welding equipment, thereby realizing the welding operation of large complex special-shaped three-dimensional components, and multi-point welding at any point can be realized through the cooperation of the welding robot and the auxiliary robot. The control system controls the robot and the feeding and blanking system to cooperate with the displacement worktable to realize automatic feeding, welding and blanking operations, the welding parameters and operations can be automatically adjusted for the special components of the structure, to realize integration and intelligence, improve production efficiency and reduce production costs.

The invention relates to the technical field of valve shell assembling and welding, in particular to a valve shell assembling and welding device which comprises a base and further comprises a moving mechanism, a positioning mechanism, a welding mechanism and two side plates. The positioning mechanism comprises two moving rings, two adjusting assemblies, two clamping assemblies, a plurality of sliding grooves, a plurality of sliding blocks, a plurality of abutting rods and a plurality of L-shaped positioning blocks. The welding mechanism comprises a driving assembly, two welding heads and two rotating assemblies. Two pipe openings of a valve can be positioned through the multiple abutting blocks on the two sides, a flange plate can be positioned through the multiple L-shaped positioning blocks on the two sides, and meanwhile due to the fact that the abutting blocks and the L-shaped positioning blocks on the same side are concentric, the positioned pipe openings of the valve and the flange plate can be concentric; it can be effectively guaranteed that the flange plate is accurately aligned with the pipe opening, the welding effect and firmness are guaranteed, and the phenomenon of virtual connection and virtual welding is avoided.

The invention relates to an intelligent visual identification technology-based cold solder joint microcrack intelligent discrimination method, which comprises the steps of collecting an initial RGB image of a to-be-detected welding spot, carrying out two-dimensional discrete cosine transform and inverse two-dimensional discrete cosine transform on the initial RGB image to obtain an enhanced image, and fusing the enhanced image with an R channel of the initial RGB image to obtain a fused image; forming a dual-channel feature map; calculating the phase consistency of the dual-channel feature map, and obtaining a suspected candidate region of the pseudo soldering microcrack through an adaptive threshold segmentation method; acquiring an RGB image sequence of a continuous time sequence of the welding spots, and performing anomaly detection to obtain an abnormal region set; and constructing a welding spot thermal diffusion model, and inputting the geometric parameters and the environmental parameters in the abnormal region set into the welding spot thermal diffusion model to obtain a final judgment result of the pseudo soldering microcracks. According to the method, through multi-dimensional feature fusion and continuous time sequence dynamic tracking, the detection precision of the pseudo soldering microcracks is remarkably improved, the false detection rate is reduced, and the final judgment result is more accurate.

The invention provides a high-precision intelligent welding system adapting to complex working conditions, and relates to the technical field of laser welding. The high-precision intelligent welding system adapting to the complex working conditions comprises the steps of S1, based on a high-resolution visual sensor and a laser scanner, S2, based on preprocessed point cloud data, S3, based on a workpiece three-dimensional model, S4, based on an optimized welding path and a material attribute database, S5, based on a dynamic welding parameter set, S6, based on a real-time welding track, and S7, based on multi-sensor monitoring data. S8, based on a defect detection report; and S9, based on a repaired welding result and historical welding data. According to the invention, the geometric data of the workpiece are collected through the high-resolution visual sensor and the laser scanner, the filtering algorithm is applied to remove noise to generate high-quality point cloud data, and a subsequent processing foundation is laid; workpiece features are identified by using a point cloud processing algorithm and a machine learning method based on the point cloud data, and an accurate digital model is generated through a three-dimensional reconstruction algorithm.

The invention relates to the technical field of condenser welding, and particularly discloses an aluminum condenser welding device which comprises a workbench, a pair of sliding blocks are assembled on the workbench in a left-right sliding mode, a driving piece and a pushing piece which are matched with the sliding blocks are arranged on the workbench, and the sliding blocks are rotationally connected with the driving piece. A rotating piece for driving the sliding block to rotate to a vertical state is arranged at the joint of the sliding block and the driving piece; a wiping layer is arranged on the sliding block, the wiping layer is located above the sliding block when the sliding block is in a horizontal state, a plurality of ejector rods are arranged on the sliding block in a sliding mode, the ejector rods abut against the inner side of the wiping layer, an oil cavity filled with hydraulic oil is formed in the sliding block, the end of each ejector rod extends into the oil cavity, and a push plate is arranged on the side, away from the wiping layer, of the sliding block in a sliding mode. The push plate moves relative to the sliding block to adjust oil pressure of the oil cavity to drive the ejector rod to move. The aluminum condenser welding device has the effect of improving the welding efficiency and the welding precision.

The present application relates to the technical field of battery production, and provides a smart production line for a cylindrical cell, comprising, successively arranged in a processing direction, a cell loading station, a cathode current collector welding station, a cathode coating station, a cell in-casing station, a cathode post welding station, an anode current collector welding station, a current collector lateral welding station, a cover plate tack welding station, a cover plate seal welding station, a cell unloading station and a cell transfer mechanism. The present application reasonably distributes each processing station to more reasonably process and produce cells and, during the entire production process, the stations can cooperate with each other to efficiently complete production and effectively improve the yield and the degree of automation during the cylindrical cell processing procedures, reducing cylindrical cell production costs.

The invention relates to the technical field of chip processing, in particular to a chip multi-station welding self-adaptive clamping device which comprises a bearing frame, a support is arranged at the top of the bearing frame, a self-driven rotating disc is arranged in the support, a driving part of the self-driven rotating disc is arranged in the inner side of the support, and a gap is formed between the disc face of the self-driven rotating disc and the top face of the support. A plurality of positioning plates are symmetrically arranged on the top of the self-driven rotating disc in the circumferential direction, a plurality of clamping blocks are arranged on the tops of the positioning plates in a sliding and penetrating mode, and buffering parts are arranged in the clamping blocks. By means of single-shaft rotation driving of the self-driven rotary disc and threaded meshing transmission of the gradient disc, the spiral sleeve and the electric spiral rotary disc, synchronous control over clamping action of the clamping blocks and station switching of the rotary disc is achieved, an extra power source is not needed, the structure is remarkably simplified, and the multi-station welding efficiency is improved; the abutting rod spherical transition structure of the buffer part is designed to be matched with the rigidity of the second spring, the counter-acting force is automatically absorbed when the clamping block makes contact with the chip, and the clamping force is dynamically adjusted through the compression deformation quantity of the second spring to prevent the chip from being pressed and damaged.

The invention provides wafer-level reflow soldering equipment, belongs to the technical field of reflow soldering, and solves the problems that existing reflow soldering equipment is low in efficiency, poor in wafer reflow soldering treatment effect and the like. Comprising an EFEM system and a process area box arranged on the rear side of the EFEM system, two wafer loading and unloading machines are arranged on the front side of the EFEM system, a control system is arranged on the side portion of the EFEM system, a transfer robot and an equipment fan filter are arranged in the EFEM system, and a rotary welding system, a valve terminal box, a power box, a power distribution cabinet, an exhaust system and a formic acid storage tank are arranged in the process area box. The formic acid storage tank is connected with the rotary welding system through a pipeline, and an air inlet of the formic acid storage tank is connected with an external liquid nitrogen tank through a pipeline. According to the invention, the wafer can be stably carried and placed, temperature rise and temperature reduction suspension uniform heating treatment are carried out, rapid temperature reduction suspension uniform cooling treatment is carried out, positioning loading and auxiliary temperature reduction cooling treatment are realized, high wafer processing efficiency is ensured, and the processing effect is good.

The invention relates to the technical field of chip welding, in particular to a pin lossless welding device for chip processing and a welding method thereof.The method comprises the steps that laser scanning processing is conducted on a chip pin area to obtain three-dimensional space coordinate data of a chip, and the three-dimensional space coordinate data comprises a plurality of data points; generating a plurality of connection nodes according to the incidence relation of the plurality of data points in the space, and performing clustering processing on the plurality of connection nodes to obtain a plurality of regional node clusters; performing welding path optimization processing and heat flow distribution simulation processing on the plurality of regional node clusters to obtain a temperature change curve of each path; and performing data analysis processing and dynamic adjustment processing on the temperature change curve to obtain a final welding control strategy, and controlling the welding robot to weld the chip based on the final welding control strategy. According to the method, the defects of an existing welding technology in the aspects of precision, stability and adaptability are effectively overcome by dynamically adjusting the control strategy.

The embodiment of the invention relates to the photovoltaic field, and provides a photovoltaic cell and a photovoltaic module, and the photovoltaic cell comprises a cell substrate which is provided with two opposite edge regions along a first direction and a central region located between the two edge regions; the plurality of grid lines are positioned on the battery substrate and are arranged at intervals along a first direction; the first welding spots and the second welding spots are located on at least part of the edge areas and arranged at intervals in the first direction, the second welding spots are located on the areas, close to the central area, in the edge areas, and the first welding spots are located on the sides, away from the central area, of the second welding spots; the orthographic projection area of the first welding spot on the battery substrate is smaller than that of the second welding spot on the battery substrate; the first connecting lines are located on at least a part of the edge areas, the first connecting lines are in contact connection with the first welding spots and the second welding spots, and are in contact connection with a plurality of grid lines located on the sides, away from the central area, of the second welding spots, and the transmission efficiency of carriers in the photovoltaic cell is at least improved.

The utility model discloses assembly welding equipment for a flange connecting pipe of a pressure vessel, which belongs to the technical field of pressure vessel manufacturing equipment and comprises a first workpiece clamping component fixedly arranged on a lathe bed and a second workpiece clamping component arranged on the lathe bed through a moving component, and the second workpiece clamping component can be close to or far away from the first workpiece clamping component. The first workpiece clamping assembly and the second workpiece clamping assembly each comprise a chuck fixing base, and a rotating chuck is installed on one side of each chuck fixing base. Three clamping jaws are arranged on the rotary chuck; the clamping jaws can move in the radial direction of the rotary chuck. The clamping jaw is driven by a first pneumatic motor; the rotary chucks are driven by a second pneumatic motor to rotate, and the center lines of the two rotary chucks are coaxial; the device further comprises a welding mechanism and a ground wire contact block. The welding mechanism is arranged corresponding to a welded junction of the flange and the connecting pipe. The ground wire contact block is arranged on a chuck fixing seat of the first workpiece clamping assembly; according to the utility model, the assembly precision can be improved, the clamping time can be shortened, and the processing efficiency can be improved.

A busbar-free electrode structure, IBC solar cell, and a photovoltaic system, used in the technical field of solar cells. Since first end welding points close to a third edge and disposed at a first break position are not connected to a first fine grid, but are electrically connected to a part of a second fine grid closest to the third edge, second fine grids close to a first edge can be connected together. On this basis, the first end welding points can be disposed, by means of the described electric connection manner, at a positions distant from the first edge of the silicon substrate, so that when a welding strip is subsequently welded to a first end welding point, because there is a relatively large distance between a disposed first end welding point and the first edge, the risk of hidden cracks during welding can be reduced, the cell yield can be improved, and overall convergence of the second fine grid can be achieved.