44results about How to "Reduce welding defects" patented technology

The invention discloses a pipeline welding butt joint device, and belongs to the technical field of hydraulic engineering pipeline welding. The pipeline butt joint mechanism is arranged at the upper end of the carrying plate and comprises a sliding rail, two axial limiting assemblies and a double-end lead screw, and the two axial limiting assemblies are symmetrically installed on the sliding rail in a sliding mode and used for clamping and axially limiting the welding end of a pipeline; the two ends of the double-end lead screw are in threaded fit with the two axial limiting assemblies correspondingly. The pipeline rotating mechanism is arranged at the upper end of the carrying plate and comprises two circumferential limiting assemblies, and the two circumferential limiting assemblies are symmetrically arranged and used for clamping and rotating the non-welding end of a pipeline; through the overall structure arrangement, stable placement of the pipeline is completed, continuous and stable rotation of the pipeline in the circumferential direction is achieved, the problems of uneven rotating speed, shaking and deviation caused by manual rotation of the pipeline are avoided, and the circumferential weld forming quality and welding consistency are remarkably improved.

This invention discloses a hot-melt welding device for large-diameter water supply pipes, the core of which consists of an assembly base, a positioning fixture, a pressurizing component, and a hot-melt component. The positioning fixture is equipped with a sliding base and longitudinal and transverse positioning components, ensuring precise connection of the water supply pipes. The pressurizing component, through a lifting base, a pressurizing unit, and an opening and closing adjustment component, achieves uniform pressure on the welding area, optimizing the welding process. The hot-melt component is responsible for heating the interface, ensuring welding quality. This design significantly improves welding efficiency and connection accuracy. This invention effectively solves the problems of low welding efficiency, poor connection accuracy, and difficulty in guaranteeing welding quality in existing technologies, providing an efficient, precise, and stable technical solution for welding large-diameter water supply pipes.

The application discloses a kind of hydraulic support main reinforcement assembly stitch welding methods using nano coating steel plate, it is related to welding technical field, according to drawing, draw the weld line of position of the part needing to be welded on main reinforcement plate and backing plate, according to the weld line of position drawn on the surface of main reinforcement plate and reinforcing plate, first using hand-held laser derusting equipment to the nano coating within 20mm range on both sides of weld line preliminary cleaning, then using sanding machine to manually polish, remove the residue on the surface of steel plate after laser derusting, draw reinforcing plate position line on main reinforcement plate, place reinforcing plate on main reinforcement plate, adjust reinforcing plate position, manually position welding, wherein reinforcing plate perimeter within 1m is evenly positioned 3 times, reinforcing plate perimeter exceeds 1m and is evenly positioned 4-5 times.The application reduces the probability that nano coating is decomposed by heating during welding and causes backing welding porosity defects and cutting fluid residue in weld causes welding porosity, to ensure welding quality.

The application provides a strip steel welding control method and device based on an induction heating device, and belongs to the technical field of welding control. The method comprises the following steps: dividing a target strip steel welding area into multiple heating areas based on target strip steel specification data, and determining first welding control parameters of each heating area; welding the target strip steel welding area based on the first welding control parameters of each heating area; obtaining the temperature of the target strip steel welding area and the current of an induction heating coil during welding; calculating the temperature difference between the temperature of the target strip steel welding area and a target temperature, and calculating the current difference between the current of the induction heating coil and a target current; if the temperature difference exceeds a temperature deviation range and / or the current difference exceeds a current deviation range, adjusting the first welding control parameters of the target strip steel welding area to obtain second welding control parameters; and welding the target strip steel welding area based on the second welding control parameters. The application can improve the welding quality stability of the strip steel.

This utility model discloses a tabletop battery welding machine, including a main unit with a worktable on which welding fixtures are provided for fixing the welding rod and the battery motherboard; a laser welding system mounted on a lifting and adjusting mechanism fixedly mounted on the worktable; and a cooling system for cooling the laser welding system. This utility model significantly improves welding quality, reduces welding defects, and effectively lowers the failure rate by optimizing laser welding technology, thereby reducing battery scrapping and repair costs. This technology enhances welding efficiency, increases production speed, and improves process stability through high-voltage power supply control, making operation simpler and more widely applicable to various workpieces. It demonstrates significant progress and practical application value in the welding field, providing the industry with a high-quality, high-efficiency welding solution.

The utility model belongs to the technical field of tools, particularly relates to a framework welding tool, and provides the following scheme aiming at the quality problems that an existing fixing mode is easily interfered by human factors, welding precision and consistency are difficult to guarantee, and welding deformation, dislocation and the like are easy to occur. A first welding table, a second welding table, a third welding table and a fourth welding table are sequentially and fixedly arranged on the top of the base from left to right through bolts. The top of the first welding table, the top of the second welding table, the top of the third welding table and the top of the fourth welding table are fixedly provided with fixing assemblies through bolts, the welding table is provided with a base and four welding tables arranged in sequence, and each welding table is provided with the corresponding fixing assembly and a corresponding control switch, so that accurate fixing and convenient opening and closing of different parts are achieved. The fixing assemblies on the welding tables are customized according to the characteristics of parts, the fixing assemblies stabilize the parts through the synergistic effect of the supporting frames, the positioning pins, the air cylinders and the clamping plates according to the lever principle, and the welding precision and efficiency are ensured.

The utility model discloses a kind of hard alloy cutting edge welding positioning devices for superhard drill bit, including base, driving motor, positive and negative toothed bar, sliding block, U-shaped support, gear disc, circular ring, bolt, rubber pad and angle adjusting mechanism etc., angle adjusting mechanism contains support rod, fixed disc, limit hole, rotating shaft, gear column, bolt etc..Through driving motor drives positive and negative toothed bar, make sliding block move along sliding slot, adjust two circular ring spacing, rotate bolt, let rubber pad clamping cutting edge, rotate handle, through gear column and gear disc meshing adjustment angle, bolt is inserted into limit hole locking, the above structure has realized the accurate positioning of different specifications cutting edge, firm clamping and angle adjustment, improve welding quality and efficiency, reduce cost.

This invention discloses an automated welding production line and welding method for L-shaped ribbed steel bridge deck unit joints, relating to the field of bridge welding manufacturing technology. The automated welding production line includes L-shaped ribbed steel bridge deck units; gantry rails spaced at intervals; a multi-functional gantry workstation mounted on the gantry rails; a vision-teaching collaborative robot located inside the L-shaped ribbed steel bridge deck unit; and a tracked welding workstation located outside the L-shaped ribbed steel bridge deck unit. The automated welding method includes the following steps: S1: assembly and positioning; S2: hoisting and fixing; S3: equipment deployment; S4: first teaching welding; S5: second teaching welding; S6: equipment transfer; S7: repeating steps S2-S6 until all U-shaped groove welds of the T-shaped transverse ribs and partition joints of all L-shaped ribbed steel bridge deck units are completed. This invention solves the technical problems of low welding efficiency and unstable welding quality in existing L-shaped rib joints.

The utility model provides a kind of welding torch head and welding torch of double power double wire welding, including nozzle main body and integrated in nozzle main body main wire conducting component, slave wire conducting component, main wire adjusting assembly and angle adjusting assembly;The main wire conducting component and slave wire conducting component all include the conducting nozzle seat, conducting nozzle fixed cap and conducting nozzle assembled as a whole, the conducting nozzle fixed cap is set towards the protection gas hole of conducting nozzle one end;The main wire adjusting assembly is used to drive the overall movement of main wire conducting component along the axial direction of nozzle main body, to make the farthest main wire conducting component can extend nozzle;The angle adjusting assembly is used to adjust the included angle between main wire conducting component and slave wire conducting component. The scheme moves up and down by controlling double wire, can adjust dry extension length, can also adjust double wire spacing and included angle, uses sufficient adjusting flexibility to ensure welding stability.

This utility model relates to the field of welding equipment technology, and in particular to an adaptive positioning platform for automated welding equipment. It includes a welding worktable, on which a clamping assembly is mounted. The clamping assembly includes a positioning base, a support plate fixedly connected to the upper end of the positioning base, a protective shell fixedly connected to the upper end of the positioning base, and a locking assembly fixedly connected to the upper end of the protective shell. A cover frame is fixedly connected to the upper end of the locking assembly by bolts, and a sealing plate is fixedly connected to the inner side of the cover frame by adhesive bonding. A telescopic unit is inserted into the inner side of the sealing plate. The locking assembly includes a sandwich plate. In this utility model, during use, the device can find a suitable contact point on the edge of the workpiece and effectively clamp it. By injecting air, the clamping force of the clamping part is finely adjusted, achieving stress dispersion during welding operations and effectively avoiding slight workpiece displacement and localized stress concentration caused by uneven clamping force.

The utility model discloses a double-station welding table which comprises a welding station table and a welding manipulator, the welding manipulator is arranged at the side end of the welding station table, the double-station welding table further comprises a protection mechanism and an auxiliary mechanism, the protection mechanism is arranged on the welding station table, and the auxiliary mechanism is arranged on the lower side; the protection mechanism comprises a safety door, and the safety door is rotationally connected to the welding station table. A double-station welding table is provided with an electric push rod, an electric disc, a connecting block and a hydraulic rod, the hydraulic rod extends to drive a push plate to push a driving motor, and the position of a workpiece storage box on a belt is adjusted. The diversified requirements are met through flexible fine adjustment of the position of the storage box, the universality and adaptability of production equipment are enhanced, products in the workpiece storage box are welded through cooperation of extension of an electric push rod and rotation of an electric disc with a welding manipulator, welding dead corners are avoided, welding is firmer, and welding defects are reduced.

The utility model relates to the field of embedded industrial control mainboards, in particular to an embedded industrial control mainboard reflow soldering device with stable clamping, which comprises a reflow soldering machine body, a main body for welding an embedded industrial control mainboard, and a soldering groove arranged inside the reflow soldering machine body and used for bearing the embedded industrial control mainboard. The reflow soldering device for the embedded industrial control mainboard is provided with the soldering frame, the bearing plate support, the threaded rod, the clamping sleeve, the telescopic buffer spring, the hexagonal nut, the clamping grating, the positioning point and the vacuum chuck, when the reflow soldering device for the embedded industrial control mainboard is used, the position of the bearing plate support on the soldering frame can be adjusted through the bolt according to the size of the current embedded industrial control mainboard, so that the embedded industrial control mainboard can be conveniently and rapidly welded. The embedded industrial control mainboard is placed in the groove of the bearing plate support, the threaded rods are sleeved with the clamping sleeves at the four corners of the clamping grating respectively, the hexagonal nuts are twisted to enable the clamping sleeves to press the telescopic buffer springs downwards, and the embedded industrial control mainboard is clamped and fixed from the upper portion through the clamping grating.

This invention discloses a welding device for a hot water boiler used in coffee machines, relating to the field of coffee machine technology. It includes a laser welding module, a protection module, a robotic arm, and a control module. The control module is configured to: acquire material property data and weld type of the parts to be welded, wherein the parts to be welded include a first stainless steel part and a second stainless steel part; based on the material property data and weld type, search for matching process parameters from a preset process database, wherein the process parameters include welding parameters, shielding gas parameters, and welding path; based on the process parameters, simulate and analyze the temperature and stress field distributions during the welding process to determine target process parameters; and control the laser welding module, protection module, and robotic arm to perform welding operations on the parts to be welded based on the target process parameters. This application has the effect of improving welding quality.

This invention relates to the field of welding technology and discloses a welding equipment for the frame of an automotive generator, comprising a circular tube support frame. A support beam is fixedly connected to the top outer surface of the circular tube support frame, and a support plate is fixedly connected to the bottom outer surface of the circular tube support frame. An adjustment and limiting mechanism is provided on the outer surface of the circular tube support frame. A following adjustment mechanism and an auxiliary support mechanism are fixedly connected to the outer surface of the adjustment and limiting mechanism. The adjustment and limiting mechanism includes a first motor, the output end of which is fixedly connected to a base plate. A limiting component is engaged within the base plate via a sliding groove. This allows for welding of frames with different planes and circular tube sizes, reducing auxiliary time and improving welding continuity and efficiency. Furthermore, it allows the generator frame to rotate, greatly facilitating operator operation, reducing labor intensity, and contributing to improved welding quality stability and production efficiency.

The invention relates to the technical field of welding equipment, and discloses an automobile metal plate welding robot which comprises a base, a robot body is fixed to the base, a mounting base is fixed to the tail end of the robot body, a laser welding device is fixed to the mounting base, a welding gun is fixed to the laser welding device, and the welding gun is fixed to the welding device. The welding gun is rotatably connected with a rotating sleeve, two mounting blocks are fixed on the rotating sleeve, a cleaning box is fixed on one of the mounting blocks, a movable mounting back plate is arranged in the cleaning box, and a scraping piece and a wiping piece are arranged on the mounting back plate; the purpose that the scraping piece and the wiping piece abut against the welding gun at the same time for automatic cleaning can be achieved, time and labor are saved, convenience and rapidness are achieved, shutdown is not needed, the workpiece welding efficiency is improved, meanwhile, attached impurities can be cleaned away when the welding wire moves, the welding quality of the welding wire is improved, and welding defects are reduced.

The utility model discloses a processing device for a large-diameter thin-wall steel pipe, which relates to the technical field of steel pipe processing and comprises a steel pipe driving component, a mounting bracket is fixedly mounted at one end of the steel pipe driving component, a sliding bracket is mounted on the mounting bracket in a sliding manner, and an adjusting component is mounted on the sliding bracket. The grinding assembly is movably installed on the adjusting assembly and the sliding support, the grinding assembly is composed of a supporting frame, four supporting pulleys, a motor and a grinding wheel, the supporting pulleys are symmetrically and fixedly installed at the lower end of the supporting frame, and the mounting support is arranged on the steel pipe driving assembly and provided with the sliding support. The adjusting assembly is arranged on the sliding support, the grinding assembly is arranged on the adjusting assembly and the sliding support, and the grinding assembly can be matched with the steel pipe driving assembly to grind and clean the to-be-welded part of the steel pipe, so that a clean welding surface is provided for the subsequent welding procedure, welding defects such as air holes and slag inclusion are effectively reduced, and the welding seam quality and the steel pipe structural strength are improved.

The utility model discloses a pipe clamp tool for processing thin wall steel pipe, including clamp subassembly, operating assembly and spot welding avoidance structure, and clamp subassembly contains two symmetrical pipe clamp body, and two pipe clamp bodies respectively include two clamping parts that are connected to the outer wall of steel pipe, and two connecting arms are connected in the one end of two clamping parts, operating assembly is connected with the connecting arm of two pipe clamp bodies respectively, is used for providing holding position for operating pipe clamp tool, and spot welding avoidance structure includes hollow spot welding area that is set up on the clamping part of two pipe clamp bodies along the welding circumference direction of steel pipe, and is formed pipe clamp cavity through two pipe clamp body and is combined, and the outer wall of steel pipe is adhered to the embracing structure, can one end of two steel pipes is held stably and is aligned and is resisted, guarantees that the relative position accuracy is higher when welding, carries out spot welding operation through hollow spot welding area, has reduced the auxiliary operation time, has shortened the welding period, thereby has improved production efficiency, has helped guaranteeing the welding quality.

The application belongs to the technical field of welding robots, and discloses a multi-machine cooperative intelligent mobile welding robot for ship manufacturing based on flexible manufacturing, which comprises a mobile base, the top of the mobile base is provided with a welding mechanical arm, and further comprises a height adjusting part arranged at the bottom of the welding mechanical arm and used for adjusting the height of the welding mechanical arm; the height adjusting part comprises a fixing box which is fixedly connected to the inside of the mobile base. Through the three-layer nested structure of the fixing box, the intermediate box and the jacking box, and the transmission design of the speed reducer, the screw rod and the screw cylinder, the welding mechanical arm can be precisely adjusted in height, the welding demand of different height positions in ship manufacturing can be met, the welding efficiency is improved, the welding gun can be aligned with the weld at a suitable angle, the welding arc is stable, the weld is well formed, and welding defects are reduced.

The utility model discloses a work fixture for friction stir welding, relates to the technical field of welding, and remarkably improves the welding quality and efficiency by integrating components such as a pressing mechanism, a positioning structure, a tool setting gauge and an aluminum skimming removing device. A groove in the positioning structure is accurately matched with the frame, so that the position stability of a workpiece in the welding process is ensured, and welding defects are reduced; the multiple pressing mechanisms distributed at equal intervals provide uniform pressing force, and stress concentration and gap change are avoided; the tool setting gauge realizes high-precision positioning of the stirring needle, and manual adjustment errors are overcome; the aluminum skimming removing device cleans aluminum skimming in time, and the smoothness of the working surface of the stirring needle is maintained; the portability and the installation stability of the clamp are enhanced through the design of the hanging rings and the threaded holes. The whole structure has a synergistic effect, workpiece positioning precision, welding process stabilization and operation convenience are achieved, and the problem that in traditional friction stir welding, due to positioning deviation, uneven pressing or aluminum scrap accumulation, the welding quality is reduced is effectively solved.

The application discloses a laser welding device for communication equipment components, which comprises a bearing box, a laser welding device is installed on one side of the upper end of the bearing box, a protection mechanism is buckled on the laser welding device, an air suction structure is installed in the protection mechanism, a metal separation box is arranged on one side of the bearing box, a rotating device is installed on one side of the metal separation box, and a centrifugal filter assembly is connected to one end of the rotating device.

The invention belongs to the technical field of laser welding, and particularly relates to new energy automobile battery production automatic welding equipment which comprises a frame, a conveying belt is arranged in the frame, a plurality of storage boxes are arranged at the top of the conveying belt, the internal structures of the storage boxes are the same, and fixing assemblies are fixedly installed in the storage boxes. The retention assembly is used for aligning and fixing the plurality of batteries; when the laser welding device carries out laser welding on the nickel sheet and the battery lug, the correction assembly can drive the rolling shaft to carry out attachment correction on the nickel sheet and the battery lug, so that when the laser welding device carries out welding on the nickel sheet and the battery lug, alignment attachment can be carried out on the nickel sheet and the battery lug, and the phenomenon that the nickel sheet and the battery lug are damaged when the laser welding device carries out welding operation is avoided. When the nickel sheet and the battery are welded, the nickel sheet and the battery are tilted or dislocated and deviated, so that the welding quality of the laser welding device on the nickel sheet and the battery is influenced, the laser welding device can better weld the nickel sheet and the battery, and the welding operation between the nickel sheet and the battery is facilitated.

The utility model relates to the technical field of welding tools, and discloses a flexible adjustable container door hinge welding tool which comprises a welding table, a plurality of threaded holes are formed in the upper end of the welding table, the surfaces of the threaded holes are arranged in a threaded mode, first threaded rods are in threaded connection with the interiors of the threaded holes, and second threaded rods are in threaded connection with the interiors of the threaded rods. A plurality of first threaded rods are fixedly installed on the upper end of the base, fixing cylinders are fixedly installed at the upper ends of the first threaded rods, a rotating rod is connected to the interior of each fixing cylinder through a bearing, a fixing piece is arranged on the outer surface of each fixing cylinder, and a fixing plate is fixedly installed at the upper end of each rotating rod. And the upper edge pressing part can evenly apply pressure to the upper surface of the hinge, it is ensured that the whole hinge is in a stable state during welding, and welding defects such as insufficient welding and solder skips caused by unstable fixing are reduced.

The utility model discloses a welding tool for a side window of a rail transit vehicle. The welding tool comprises a frame body and a tool body rotationally arranged on the frame body. The tool body is provided with a first operation surface and a second operation surface; and the first operation surface and the second operation surface are respectively provided with mounting grooves for processing left and right side windows of a vehicle. The rail transit vehicle side window welding tool can achieve accurate positioning machining and installation of fixed windows and movable windows of the left side window and the right side window of a vehicle, multiple welding platforms are not needed, it is ensured that all parts of the side windows are consistent in relative position during welding, deformation and size deviation during side window welding are avoided, and the welding quality of the side windows is improved. Compared with an existing welding tool for the side window of the rail transit vehicle, the quality and precision of a welded finished product are improved; and meanwhile, the operator does not need to frequently move the position of the operator or adjust the welding angle by adopting a complex auxiliary tool, so that the labor intensity is reduced, and the operation convenience and efficiency are improved.

The present application relates to point row welding machine technical field, especially provide gantry type point row welding machine, including the crossbeam plate of horizontal arrangement, and at least two groups of welding rod components are arranged along the horizontal direction of the crossbeam plate, the welding rod component includes welding electrode rod and elastic buffer assembly, the elastic buffer assembly is installed on the crossbeam plate, and is connected with the welding electrode rod, is used for driving the welding electrode rod along vertical direction elastic float, to adapt to the relief of the surface of the component to be welded, it further includes linkage fine adjustment mechanism, the linkage fine adjustment mechanism is connected between the welding electrode rod of adjacent two groups of welding rod components and the elastic buffer assembly, through the gear rack linkage transmission drive welding electrode rod relative assembly sleeve secondary upward fine adjustment, realize secondary avoidance protection under the condition of excessive convex, adopt linkage and realize the twice overload extrusion of electrode rod Unload effect, simple structure.

This invention provides a handheld laser welding device for preventing wire twisting, belonging to the field of laser welding technology. It addresses the problem in existing handheld laser welding torches where the wire feed tube easily twists due to torch movement, leading to uneven wire feeding. The handheld laser welding device includes a welding torch and a wire anti-twist device detachably connected to the torch. The anti-twist device includes a first wire nozzle, a second wire nozzle, and a quick-release structure. Both the first and second wire nozzles have wire holes. The tail end of the first wire nozzle rotatably engages with the head end of the second wire nozzle. The quick-release structure is located on the outer layer of the engagement point between the first and second wire nozzles and restricts unintended axial sliding of the first and second wire nozzles. By optimizing the structural design of the wire anti-twist device on the handheld laser welding torch, the problem of wire feed tube twisting due to dragging during welding is effectively avoided, ensuring smooth wire feeding.

The application provides a welding auxiliary device and a plate heat exchanger welding method. The welding auxiliary device is used for welding of a plate heat exchanger and a joint. An upper end plate of the plate heat exchanger is defined as a plate. The welding auxiliary device comprises: a mounting seat; a first positioning member arranged above the mounting seat, wherein the first positioning member comprises a first reference surface, and the first reference surface is located on a lower surface of the first positioning member; and a second positioning member arranged above the mounting seat, wherein the second positioning member comprises a supporting surface. The second positioning member and / or the first positioning member can move in a vertical direction to adjust a height difference between the supporting surface and the first reference surface. The application can control reliable cooperation of the joint and the interface part and ensure welding quality between the joint and the interface part.

The application relates to a steel welding method, which comprises the following steps: providing a micro-alloy steel; performing laser surface alloying treatment on a region of the micro-alloy steel to be welded to form an alloy layer; performing ion injection treatment on the alloy layer to obtain a to-be-welded layer; performing welding on the micro-alloy steel by taking the to-be-welded layer as a welding operation region to obtain a welded product; and performing annealing treatment on the welded product, wherein the micro-alloy steel comprises 0.05-0.5% of neodymium, 0.05-0.5% of lanthanum, 0.3-1.5% of niobium and 0.3-1.5% of molybdenum in percentage of the mass of the micro-alloy steel. The steel welding method provided by the application can make the material of the welded structure have high tensile strength and impact toughness, and is beneficial to reducing welding defects.

The application provides a real-time welding quality control method, a control device and a welding system. The method comprises the following steps: acquiring an image of a welding area of real-time welding to obtain a welding image; extracting welding features from the welding image, wherein the welding features comprise a welding fusion line included angle, a welding torch welding wire included angle, a welding wire dry elongation, a picture offset angle and a welding wire swing center coincidence degree; and issuing an alarm information in the case that the welding features are not within the corresponding predetermined range, wherein the alarm information is used to remind possible welding defects, so as to assist a welder in adjusting welding process parameters in real time, improve a welding environment of the welder, reduce the generation of welding defects, improve welding quality, and solve the problem that the welding quality is guaranteed by relying on manual experience in the prior art without manual welding or close observation of welding by a welding machine.

This invention provides a composite pulse short-circuit oscillation method and apparatus for MIG welding of aluminum alloys, relating to the field of aluminum alloy welding technology. This composite pulse short-circuit oscillation method is used for large-gap vertical welding between aluminum alloy die-castings and profiles. It includes multiple consecutive welding cycles, with a large gap of 0.5mm to 1.8mm. The welding torch push angle is 0°, and the welding torch oscillates reciprocally along the weld direction. Each welding cycle includes alternating forward oscillation and backward oscillation phases, with the oscillation center point of the welding torch as the boundary. During the forward oscillation phase, the welding wire is fed in the forward direction, including alternating pulse and short-circuit phases.

The application provides a preparation method of an IBC battery assembly, and relates to the technical field of photovoltaic assemblies. The preparation method of the IBC battery assembly comprises a printing process of an IBC battery piece, and the printing process comprises the following steps: printing a tin paste part on a pad point of the battery piece; the tin paste part comprises a first tin paste part and a second tin paste part, the first tin paste part and the second tin paste part are arranged at intervals, the width of a tin paste gap formed between the first tin paste part and the second tin paste part is small in the middle and large at both ends, and the tin paste gap is arranged to extend along the arrangement direction of the pad point. The application can increase the contact area of the solder strip pressed on the pad point, improve the tin rate of the tin paste, ensure the welding yield, completely release the performance of the IBC battery piece through the solder strip, and improve the fill factor of the solar photovoltaic assembly.