44results about How to "Improve welding productivity" patented technology

The invention discloses an H-shaped steel automatic welding roller way conveying system. Comprising a lower wing plate feeding line, a web feeding line, an upper wing plate feeding line, a lower wing plate and web assembly line, a T-shaped steel assembly welding straightening blanking transition line, a T-shaped steel assembly welding straightening blanking line, a web lifting turnover line, a T-shaped steel upper wing plate assembly line, an H-shaped steel assembly welding straightening blanking transition line and an H-shaped steel assembly welding straightening blanking line which are arranged in parallel in the same direction. The lower wing plate feeding line, the lower wing plate web assembling line, the T-shaped steel assembling, welding and correcting discharging line, the web feeding line, the upper wing plate feeding line, the T-shaped steel upper wing plate assembling line and the H-shaped steel assembling, welding and correcting discharging line are each composed of a plurality of roller bed units. The web lifting turnover line is composed of a plurality of lifting roller bed units; and the T-shaped steel assembling, welding and straightening blanking transition line and the H-shaped steel assembling, welding and straightening blanking transition line are respectively composed of a plurality of transition roller bed units. The problems that an existing H-shaped steel welding production line is high in labor intensity and low in efficiency, and safety factors exist in a working site can be solved.

The invention relates to the technical field of gold bonding wires, in particular to a gold bonding wire welding method and system based on artificial intelligence optimization. S2, constructing a grid map, and generating an initial optimal path by using an RRT algorithm; optimizing the initial optimal path by using a DWA algorithm and a bidirectional Theta * algorithm to obtain an optimal welding path; s3, a prediction model is constructed based on a machine learning algorithm, a prediction result is output, and then the optimal welding path is adjusted; s4, the workpiece is welded according to the optimal path; and S5, acquiring a workpiece image of the gold bonding wire finished product to judge whether the appearance of the gold bonding wire finished product meets a preset standard or not. According to the method, the initial optimal path generated by the RRT algorithm is optimized by combining the DWA algorithm with the bidirectional Theta * algorithm, so that the welding path planning efficiency is improved, the gold bonding wire welding safety is ensured, and the welding production efficiency and the production quality are remarkably improved.

The invention provides a titanium alloy current-assisted vacuum brazing tool and process method. The titanium alloy current-assisted vacuum brazing tool and process method comprises the steps that S1, a titanium alloy columnar body to be welded is machined; s2, TiZrCuNi brazing filler metal alloy powder is adopted for preparing a brazing middle layer; s3, polishing the welding surface of the titanium alloy cylindrical body to be welded; s4, the welding face of one to-be-welded titanium alloy base material is placed upwards, brazing filler metal alloy powder of a brazing middle layer is evenly spread, the welding face of the other titanium alloy base material is placed above the middle layer downwards, and a three-layer structure is formed; s5, a workpiece to be welded and a thermocouple are inserted into a titanium alloy current auxiliary vacuum brazing tool and then placed in a vacuum hot-pressing brazing furnace, graphite cushion blocks are arranged at the top of the upper-layer base metal and the bottom of the lower-layer base metal correspondingly, and an electrode pressing head makes contact with the graphite cushion blocks at the top of the upper-layer base metal; and S6, titanium alloy current auxiliary vacuum brazing is conducted. According to the method, the workpiece is rapidly and uniformly heated in a heating and current applying mode, and the titanium alloy brazed joint which is good in bonding strength and excellent in performance is prepared.

The utility model relates to the technical field of door and window welding, and discloses a welding device for door and window production, which comprises a welding frame, a welding platform, a driving mechanism, a welding rod, a welding rod, a driving mechanism and a driving mechanism, and is characterized in that the welding frame comprises a welding platform, and a stand column is inserted on the welding platform; through cooperation of a welding frame, a driving mechanism and a welding air cooling mechanism, a forward and reverse rotation motor drives a first linkage assembly to drive a first screw rod to rotate to adjust the position of the welding air cooling mechanism above a welding table, so that upper surface nodes of a window frame are welded conveniently; meanwhile, a second linkage assembly transmits kinetic energy of a first screw rod to a second screw rod to drive a welding air cooling mechanism below a welding table to adjust the position, then joints on the lower surface of the window frame are welded, synchronous welding of the two sides of the window frame is achieved, the welding efficiency is improved, air is conveniently blown to the window frame joints before and after welding, and the welding quality is improved. And the welding seam is cooled while impurities are cleaned, so that the window frame welding quality is improved, and the door and window welding production efficiency is improved.

The invention discloses a full-automatic welding production line for base plates, and relates to the field of welding automation of iron base plates for railway track turnouts. The full-automatic base plate welding production line is mainly used for full-automatic welding production operation of passenger flat base plates and grinding line (heavy-load track type) common base plates. The full-automatic base plate welding production line comprises a visual recognition feeding assembly, a secondary positioning device, an assembly tool, a spot welding positioning stacking robot, a spot welding robot, a welding workbench, a full welding work station and a finished product discharging position. The full-automatic base plate welding production line is used for achieving automatic and intelligent operation of the whole process of feeding, assembling, welding and discharging stacking of passenger flat base plates and line grinding common base plates, full-automatic transferring and full-automatic welding of materials can be achieved, unmanned production is achieved, the base plate welding production efficiency is improved, the labor cost is saved, and the working environment is improved.

The invention discloses follow-up welding forming clamping equipment for inner and outer circumferential welds of a cylinder, and belongs to the field of welding equipment. The welding forming clamping equipment comprises a base, a lower pressing mechanism, an upper pressing mechanism, a lifting driving mechanism, a turn-over driving mechanism, a turn-over seat, a rotary driving mechanism and a clamping positioning mechanism. The holding and clamping positioning mechanism is used for supporting the thin-wall barrel, and self-deformation of the barrel is avoided; the upper pressing mechanism and the lower pressing mechanism are matched to clamp and fix all the to-be-welded products, the positioning precision and the clamping stability of the parts are guaranteed through the ring body abutting rolling wheels, and circular seam welding deformation can be reduced easily; besides, the upper and lower pressing mechanisms are used for driving the cylinder part to perform rotary welding, the turn-over mechanism is used for driving the cylinder part to perform turn-over welding, one-time welding forming of inner and outer welding seams at the two ends of the cylinder part can be achieved through one-time clamping, the welding production efficiency is improved, the welding precision is greatly improved, and the welding reject ratio is effectively reduced; and the economic benefits of enterprises are improved.

The semi-automatic turnout base plate welding production line comprises an upper computer, a robot controller, a PLC, a welding power source and a carrying robot. The transfer robot is arranged in the center of the production line layout; two parallel chain plate conveying lines are symmetrically arranged on the two sides of the carrying robot, and the carrying robot is arranged on the symmetric center line of the chain plate conveying lines. Manual grouping platforms are arranged at the starting ends of the two chain plate conveying lines correspondingly, welding platforms are arranged at the tail ends of the two chain plate conveying lines correspondingly, and the welding platforms are provided with welding robots; a feeding frame is arranged at the symmetrical center line position of the two manual team forming platforms. And a finished product pad is arranged at the symmetrical center line position of the two welding platforms. A semi-automatic production scheme combining manual assembly and automatic welding is adopted, semi-automatic welding production of various turnout base plate products with full specifications and complex structures is achieved, the turnout base plate welding production efficiency and the product quality are improved, and a new thought is provided for the industrial intelligent and automatic manufacturing technology.

The present invention relates to a narrow gap laser-GMAW composite welding method coupled with a molten pool, and belongs to the field of welding technology. The technical scheme is as follows: during welding, the spot of the laser beam (1) swings along a predetermined trajectory inside the narrow gap groove, melts the side wall of the narrow gap groove, and forms a laser molten pool (3); the GMAW arc (2) remains stationary at the center position of the narrow gap groove, directly acts on the laser molten pool (3), and the GMAW arc (2) forms a liquid metal that spreads and flows along the surface of the laser molten pool (3) under the action of surface tension, and after coupling with the laser molten pool (3), a composite molten pool (4) is formed, which is finally cooled and solidified into a weld (5). The present invention ensures that the side wall of the narrow gap groove is well fused. Since the GMAW arc and welding wire do not perform periodic reciprocating motion during the welding process, the wear of the conductive nozzle is significantly reduced. In particular, for materials such as high-strength steel, stainless steel and titanium alloy, the welding stability and reliability are significantly improved during long-term welding.

The present invention discloses a single-sided full penetration welding method for medium-thick plate splices in marine engineering. By adopting special welding wire, gasket and welding equipment, comprehensively applying special welding production procedures, and adaptive control of process parameters, single-sided welding and double-sided one-time forming are achieved. The front and back side forming effects of the weld after the splicing are excellent, the turning process of the splicing components is avoided, the production process and procedures of the prior art are simplified, a large amount of auxiliary welding man-hours are reduced, and the welding production efficiency is improved.

The application discloses an aerospace part welding vertical machining center and a using method thereof, and relates to the technical field of vertical machining centers.The vertical machining center comprises a rack, a welding mechanism and a lifting frame, the welding mechanism is fixedly arranged in the rack, the welding mechanism is used for automatically welding aerospace parts, the lifting frame is slidingly connected to the inner cavity of the rack, the inner part of the rack is provided with a protection mechanism capable of rotating to block splashes, and the outer part of the lifting frame is provided with a rotary driving mechanism capable of driving the protection mechanism to rotate.The application drives the protection mechanism to rotate by using the rotary driving mechanism when the aerospace parts are machined, the protection mechanism forms a physical barrier to prevent splashes from splashing onto the surface of the workbench of the rack 1, the subsequent manual cleaning process of workers is saved, the work efficiency is improved, the protection mechanism is reversely rotated by the rotary driving mechanism when the workers open the rack after the machining is completed, the physical barrier is automatically contacted, the workers can directly take down the fixed aerospace parts and install the next parts, and the work efficiency is further improved.

The application discloses a welding method for a high-temperature alloy casing assembly with large wall thickness difference, and adopts double electron beam synchronous welding, generates an electromagnetic field by using an electromagnetic lens inside a welding machine according to the symmetrical positions of two welds, realizes the double electron beam angle deflection function of the electron beam welding machine, deflects the electron beam flow in real time at a high frequency during the welding travel, makes the electron jump at a high frequency of 0.05-500 kHz between two adjacent welds, and obtains the effect that the electron beam synchronously covers and welds the two side welds. The application solves the problems of weld undercutting and burning, effectively reduces the residual stress of the weld, reduces the welding deformation, improves the welding assembly precision of the high-temperature alloy casing parts, and effectively improves the product quality, the use performance and the failure rate of the high-temperature alloy casing.

The invention belongs to the field of rotary friction welding, and discloses a method and a related device for predicting the fracture position of a rotary friction welding joint, and a three-dimensional thermal coupling model established based on Abaqus software is utilized to obtain the fracture position of the rotary friction welding joint under preset rotary friction welding parameters. Peak temperature and peak equivalent plastic strain of all grid points in an area where the rotary friction welding head is located at the fracture position of the rotary friction welding head to be predicted; the peak temperature and the peak equivalent plastic strain of all the grid points of the rotary friction welding head are processed through the BP neural network prediction model meeting the prediction precision, and microhardness values corresponding to all the grid points are obtained; and according to the microhardness values corresponding to all the grid points, a weak area on the rotary friction welding head is determined, and the weak area serves as the predicted fracture position of the rotary friction welding head. According to the method, the weak area of the rotary friction welding head can be rapidly screened, the problem is solved in a targeted mode, a guiding effect is provided for actual welding production, and the welding production efficiency is greatly improved.

The invention discloses a method for welding a battery tray through a double-robot intelligent interaction welding station. The method comprises the following steps: S1, placing a single battery tray on a substrate and positioning through a floating positioning mechanism; s2, enabling a tray pressing unit to press the battery tray, and enabling a floating supporting mechanism to be supported at the bottom of the battery tray; s3, the two pressing plates are placed on the two upper covers of the battery tray; s4, the two pressing plates are pressed by a third pressing mechanism; s5, a servo sliding table is made to move to a designated position, a plurality of fourth pressing mechanisms are made to press two pressing plates, and the double robots are made to conduct welding at the same time along the first-stage welding tracks of the two water cooling areas of the battery tray correspondingly; s6, the servo sliding table and the two pressing plates are moved away; s7, the two robots are made to conduct welding along the second-stage welding tracks of the two water cooling areas; and S8, taking out the battery tray. The welding quality and efficiency are high, and manpower resources are saved.

This utility model discloses a clamping device for welding the side wall panel and diagonal brace of a railway freight car, relating to the field of railway freight car manufacturing. It includes: a connecting rod, spanning across the railway freight car and arranged along its width; a moving mechanism at each end of the connecting rod, the moving mechanism comprising multiple moving rollers that engage with the upper side beam of the railway freight car; two pairs of slide rails, each pair vertically positioned at both ends of the connecting rod, with two slide rails in each pair positioned on the inner and outer sides of the side wall of the railway freight car; a lifting mechanism slidably mounted on the slide rails, the output end of which extends and retracts horizontally, engaging with the diagonal brace and the side wall panel; this clamping device ensures that the welded assembly meets the dimensional requirements of the railway freight car, reduces the number of personnel involved in the welding process, and improves welding efficiency.

The utility model provides a core package structure and a square electric core, relates to the battery technical field, the core package structure comprises 2n laminated roll cores, n is greater than or equal to 2, the roll cores are grouped according to a one-to-one correspondence mode to form n roll core groups, each roll core group comprises two roll cores, the two roll cores at the central position of the laminated arrangement form a central roll core group, and n is greater than or equal to 2. The roll cores located on the two sides of the center roll core set are sequentially and symmetrically grouped outwards to form a plurality of outer side roll core sets. Tabs are arranged on the two sides of the roll core in the length direction respectively, the tabs in the central roll core group are located below the core cladding structure and gradually get away from the roll core groups from the center to the outside, and the positions of the tabs on each outer roll core group in the height direction of the core cladding structure are sequentially increased relative to the tabs close to the central roll core group. According to the core cladding structure disclosed by the utility model, the tabs on all the roll cores can be conveniently welded with the surfaces of different heights of the connecting sheets, so that the welding operability and the welding efficiency of the tabs and the connecting sheets are improved.

The present application relates to a barbecue grill rotary automatic spot welding machine and a welding method, and relates to the technical field of welding equipment, which includes a disc frame, a rotating motor for driving the disc frame to rotate is installed at the lower end of the disc frame, a plurality of positioning plates are arranged equidistantly around the axis of the disc frame, a limiting ring groove for placing a frame in the barbecue grill is provided on the positioning plate, a plurality of limiting straight grooves for placing transverse ribs in the barbecue grill are provided on the positioning plate, the limiting straight grooves are connected to the limiting ring grooves, a welding hole for welding the frame and the transverse ribs is provided on the positioning plate, and a welding mechanism for welding the transverse ribs and the frame is provided on one side of the disc frame. The present application has the effect of improving the production efficiency of barbecue grill welding.

The invention relates to the technical field of industrial welding robots, and discloses a multi-layer welding track planning method based on combination of 3D laser vision and a robot, which is applied to industrial welding equipment and specifically comprises the following steps: S101, receiving a welding request sent by a controller, the welding request carries welding process parameters of a welding part and a welding material of the welding part; and S102, welding process parameters of the welding part are obtained, and the welding process parameters are input into a preset content text recognition model. According to the method, the 3D laser vision module is used for rapidly scanning to obtain information of the bottom wall and the slope surface of the weld joint opening, the attribute characteristics of the weld joint opening are judged, a three-dimensional model of the weld joint opening is established, and a welding track path of a single-layer weld joint filling surface is obtained, so that industrial welding equipment is controlled to realize multi-layer welding track automatic welding; the defects of tedious teaching, large workload, expensive auxiliary equipment and the like in the prior art are overcome.

The application provides a battery string welding method. The battery string welding method comprises the following steps: preparing a plurality of battery pieces (1) of a same battery string; preparing at least one continuous welding strip; making the continuous welding strip sequentially contact and weld with the same surface of the plurality of battery pieces (1) through one or more continuous pulling of the continuous welding strip to form a conductive path; and completing the welding of the whole battery string; wherein the continuous welding strip is not bent during the welding process and keeps a continuous extension state after the welding is completed. The battery string welding method can reduce the problem of hidden cracks of the welding strip, avoid the risk of less welding strips, improve the welding capacity, improve the production efficiency, and improve the battery performance.

This invention relates to the field of galvanized steel strip welding technology. The invention discloses a welding positioning device for galvanized steel strip production, comprising a horizontal platform, a release frame on one side of the top of the horizontal platform, a laser cutting machine on the front side of the release frame (the laser cutting machine is tilted), a side seat on the side of the horizontal platform, a first drive motor at one end of the side seat, a lead screw rotatably connected to the output end of the first drive motor, the lead screw rotatably mounted on the side seat, a drag seat slidably connected to the lead screw, a rack fixedly connected above the side seat, and a control frame fixedly connected to the top of the drag seat. This device causes the two ends of the steel strip to curl and align with each other, aligning the beveled ends. A magnetic strip is used to limit the movement of the two ends of the steel strip, allowing for welding of the steel strip ends. In this operation, technicians are not required to continuously pull the steel strip and perform curling and aligning, effectively improving the efficiency of steel strip welding production.

A kind of low vacuum laser welding method for GH4169 high-temperature alloy and SS304 stainless steel, the present application belongs to laser welding technical field.The present application solves the problem that the existing welding method cannot realize the low-cost and high-quality connection of medium thickness and above GH4169 alloy and SS304 stainless steel.One, welding assembly;Two, low vacuum laser welding;Three, heat treatment.The present application is used for the low vacuum laser welding of GH4169 high-temperature alloy and SS304 stainless steel.

The utility model provides a double-station welding device which comprises a first welding mechanism, a second welding mechanism and a conveying mechanism. The conveying mechanism comprises at least one conveying line, and the conveying line extends in the X-axis direction; the first welding mechanism and the second welding mechanism are arranged at intervals along the conveying line; the first welding mechanism comprises a first welding unit and a first power unit; the first welding unit comprises multiple sets of first welding heads arranged side by side in the X direction, and the multiple sets of first welding heads can be driven by the first power unit to move to the position above the conveying line to execute the first welding action. The second welding mechanism comprises a second welding unit and a second power unit; the second welding unit comprises at least one set of second welding heads, and the second welding heads can be driven by the second power unit to move to the position above the conveying line to execute the second welding action. According to the welding device, two welding operations can be continuously realized according to actual product requirements, and the welding production efficiency of socket products is remarkably improved.

The battery comprises a shell, a roll core and a cap assembly, the shell is provided with a blind hole, the inner wall of the blind hole is provided with an annular groove, the annular groove is close to an opening of the blind hole, the roll core is arranged in the blind hole, one end of the roll core extends to form a positive pole lug and a negative pole lug, and the cap assembly is arranged in the shell. The cap assembly comprises a rivet, a cover plate and an insulating ring, the rivet is covered with an insulating layer, notches are formed in the two ends of the insulating layer, the rivet is clamped into the cover plate, the insulating layer is located between the rivet and the cover plate, the cover plate is clamped into the insulating ring, the insulating ring is clamped into the annular groove, the positive electrode lug is connected with the rivet, and the negative electrode lug is connected with the cover plate. According to the battery with the positive and negative electrodes on the same side and the welding structure, the battery structure is improved, the positive and negative electrodes are located at one end of the battery and led out at the same end of a battery pack, and the production efficiency is improved.

The present invention discloses a wedge-shaped screen spot welding device, which belongs to the technical field of screen spot welding. The wedge-shaped screen spot welding device comprises a fixed base, wherein fixed side plates are symmetrically fixedly connected at both ends of the fixed base, a driving mechanism is installed between the fixed side plates, an angle adjustment mechanism is fixedly installed above the driving mechanism, a flipping mechanism is fixedly connected above the angle adjustment mechanism, and a wedge-shaped screen is arranged in the flipping mechanism; mounting seats are symmetrically fixedly connected at both sides of the fixed base, and a mounting plate is fixedly connected between the two mounting seats. The present invention designs a matching angle adjustment mechanism so that the staff can make corresponding adjustments according to the welding angle required at the welding point of the wedge-shaped screen, and at the same time, by designing the flipping mechanism and the cooperation of the limit block, the wedge-shaped screen can complete the automatic flipping process without stopping or manual intervention.

The application discloses an aluminum alloy box unequal-thickness butt joint friction stir welding method, which comprises the following steps: process placing of an upper panel of an aluminum alloy box, increasing a friction stir welding arc receiving plate area; cleaning the left panel, the right panel and the upper panel of the aluminum alloy box, adopting mechanical polishing and cleaning; positioning and assembling the left panel, the right panel and the upper panel on a tool, controlling the assembly gap and the misalignment to be not greater than 0.5 mm; setting the parameters of the friction stir welding, and welding the weld joints between the left panel and the upper panel and between the right panel and the upper panel. The aluminum alloy box unequal-thickness butt joint friction stir welding method utilizes the advantages of the friction stir welding to improve the welding deformation, improves the welding quality and improves the production efficiency.

The invention discloses a transformer secondary winding and a manufacturing process thereof, comprising a winding U-shaped tube, a die-stamped converging water-cooling groove, a first die-stamped converging water-cooling cover, a second die-stamped converging water-cooling cover, a first output row, a second output row, a first inlet and outlet water nozzle and a second inlet and outlet water nozzle. The top end of the winding U-shaped tube is fixedly connected to the bottom end of the die-stamped converging water-cooling groove, the top end of the first die-stamped converging water-cooling cover is welded to the first output row through holes on the first output row, the top end of the second die-stamped converging water-cooling cover is welded to the second output row through holes on the second output row, the first die-stamped converging water-cooling cover and the second die-stamped converging water-cooling cover are respectively welded to the first inlet and outlet water nozzle and the second inlet and outlet water nozzle. By updating the structure, reducing the cost, reducing the weight, improving the water cooling effect, the welding effect and the conductive effect, excellent transformer performance and transformer working efficiency are achieved, production efficiency is improved, and labor intensity is reduced.

The invention discloses an amorphous nanocrystalline strip coiling welding heat treatment device which comprises a strip coiling mechanism, the strip coiling mechanism comprises a first coiling motor, the first coiling motor is rotationally connected with a coiling seat, a first coiling shaft is arranged on the coiling seat, a movable clamping rod is arranged at the upper end of the first coiling shaft, and a second coiling shaft is arranged at the lower end of the movable clamping rod. A first guide wheel is arranged at the front end of the movable clamping rod and corresponds to the first winding shaft, a second winding shaft is arranged at the rear end of the first winding shaft, a second guide wheel is arranged at the upper end of the second winding shaft, and the second winding shaft is rotationally connected with a second winding motor. A guide frame is arranged on the second guide wheel, a guide channel is formed in the guide frame, a fractured amorphous strip can be welded again through the welding heat treatment device, the amorphous strip can be rewound into a roll, later fixed-length use is facilitated, the rejection rate of products is reduced, and the production cost is further reduced.

The utility model relates to the technical field of LED lamps, in particular to a device applied to COB light source welding, which comprises a bottom plate, an electromagnetic valve and a gas circuit rotating mechanism, the rotating mechanism is arranged at the front part of one side of the top end of the bottom plate, the gas circuit rotating mechanism comprises a rotating cylinder, the rotating cylinder is fixedly arranged at the front part of one side of the top end of the bottom plate, and the electromagnetic valve is arranged on the rotating cylinder. A support is fixedly installed at the output end of the rotating air cylinder, a heating platform is fixedly installed at the top end of the support, a COB protection plate is fixedly installed in the middle of the top end of the heating platform, and a heating module is fixedly installed in the middle of the bottom end of the heating platform. The device has the beneficial effects that the rotating air cylinder can drive the semiconductor chip on the heating platform to rotate, welding operation can be conveniently conducted on different edges of the semiconductor chip through external welding operation, physical loss of operators can be reduced, the welding production efficiency can be improved, meanwhile, operation can be conducted under the condition temperature, the welding quality is improved, and the working efficiency is improved. And the damage to the semiconductor chip due to the welding temperature problem is reduced.

The utility model discloses a rear floor framework assembly which comprises a rear floor framework, a first longitudinal beam, a second longitudinal beam, a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged between the first longitudinal beam and the second longitudinal beam in parallel, and a first welding seam is arranged between the first cross beam and the first longitudinal beam. A second welding seam is arranged between the first cross beam and the second longitudinal beam, a third welding seam is arranged between the second cross beam and the first longitudinal beam, and a fourth welding seam is arranged between the second cross beam and the second longitudinal beam; the reinforcing plates comprise the first reinforcing plate installed on the first longitudinal beam and the second reinforcing plate installed on the second longitudinal beam. The utility model further discloses an automobile with the rear floor framework assembly.

The utility model relates to the technical field of welding, in particular to a resistance welding electrode assembly which comprises a first electrode and a second electrode, the first electrode comprises a first electrode body and a first electrode cap, and the second electrode comprises a second electrode body and a second electrode cap. The second electrode cap is provided with a second end face, and the diameter of the first end face is larger than that of the second end face. Through accurate heat distribution, the welding parameter adjusting frequency is reduced, long-time stable welding is achieved, the production takt time can be effectively shortened, the comprehensive manufacturing cost is reduced, and the requirement of industrial production for efficient and stable welding is met.

The invention provides a tin-lead brazing method for stainless steel and structural steel, which comprises the following steps of: before brazing the stainless steel and the structural steel, pre-plating tin-nickel alloy on a welding part of a stainless steel and structural steel part, and then welding by using an alcohol rosin brazing flux as a soldering flux and using tin-lead brazing filler metal. The tin-lead brazing weldability of stainless steel and structural steel can be effectively improved, the quality and stability of a welded joint are improved, the corrosion resistance of welded parts and components is improved, the welding production efficiency can be improved by 1-2 times, and meanwhile the corrosion risk of residual brazing flux after welding on a part welding line area and a part base body is greatly reduced.