63results about How to "Improve welding stability" patented technology

The high-strength three-way welding connection structure for the hydrogen conveying pipeline belongs to the field of three-way welding and comprises a base, two sliding grooves are formed in the upper surface of the base, first motors are fixed to the left side and the right side of the base correspondingly, and output shafts of the first motors penetrate into the sliding grooves and are fixedly connected with first screw rods; vertical frames are in threaded connection with the outer surfaces of the first screws, second motors are fixed to the opposite sides of the two vertical frames, and the opposite ends of output shafts of the two second motors penetrate to the opposite sides of the two vertical frames correspondingly. Supporting is provided from the inner wall of the three-way pipe through the supporting rollers, the transverse pipe positioning mechanism applies clamping force from the outer wall through the clamping blocks, a double-positioning structure of inner supporting and outer clamping is formed, it is ensured that three ports of the three-way pipe are strictly coaxial, and welding deflection is avoided; the clamping force can be automatically adjusted according to the small difference of the pipe diameters of the three-way pipes, the three-way pipes of different specifications can be rapidly matched through linear driving of the sliding frame and the air cylinder, and the universality is remarkably improved.

The utility model discloses a special-shaped nut welding positioning device which comprises a spot welding machine, a supporting and driving supporting frame is fixed on the front surface of the spot welding machine, a cavity is formed in the supporting and driving supporting frame, an adjusting piece is arranged in the cavity in a rotating mode, a supporting piece is fixed at the top end of the adjusting piece, and a driving piece is arranged in the top end of the supporting piece in a sliding mode. A rotating clamping plate is rotatably arranged at the top end of the driving part, a driven stand column is fixed to the bottom end of the rotating clamping plate, a driven roller is rotatably arranged at the bottom end of the driven stand column, a cavity is formed in the rotating clamping plate, a sliding clamping plate is slidably arranged at the top end in the cavity, and a driving screw is rotatably arranged at the bottom end in the cavity. The driving wedge block and the driven wedge block in the driving piece are matched with each other, the driven roller is pushed through the action of the inclined face, then the rotating clamping plate is driven to rotate, the angle of the special-shaped nut is flexibly adjusted, the angle adjusting process is stable and accurate, and the welding positioning accuracy is improved.

The application discloses an automatic welding production line for a tower crane standard section, comprising a workpiece pre-positioning device, a workpiece positioning device, a welding device, a feeding robot and a main rotating rod feeding-welded piece discharging device. The automatic welding production line has the advantages of less manual participation, high welding efficiency, high matching precision between the constituent workpieces, high welding precision, good welding quality, good welding stability and low production cost, and is favorable for being widely applied to the automatic welding of the circular tower crane standard section.

The invention discloses a CMT electric arc welding method for defect repair welding of a ZL114A aluminum alloy casting, and belongs to the technical field of defect repair of aluminum alloy castings. The method aims at solving the problems that an existing repair welding method for the ZL114A cast aluminum alloy is high in heat input, large in deformation and low in repair efficiency. The method comprises the following steps: firstly, aiming at defects of different sizes, machining the defects into regular spherical-crown-shaped grooves of different sizes by utilizing a cold machining method; an electric steel wire brush is used for polishing the inner wall of the groove and base metal around the groove, and surface stains and oxide skin are removed; the casting is placed on a welding workbench; robot CMT welding equipment is adopted for repair welding; and writing a welding gun repairing path on the robot demonstrator. And repair welding is carried out according to the following principles: repair welding is carried out by utilizing an Al-Si welding characteristic curve, a repair welding piece is preheated to 250-350 DEG C, shielding gas is started, and automatic repair is started according to the planned path, the wire feeding speed and the welding speed. By means of the method, high-quality repair welding seams without pores and cracks can be obtained.

A laser welding device and method for sealing nails of large cylindrical batteries with adjustable local atmosphere belongs to the field of new energy vehicle battery welding technology. The device includes an outer shell fitted onto the top of the battery casing, a high-lens lens mounted on the top of the outer shell via a supporting frustum, an annular gas path structure disposed inside the outer shell, dividing the back of the outer shell into upper and lower chambers, a vacuum device connected to the upper chamber via a pipeline, and a dust removal device connected to the annular gas path built into the annular gas path structure via a pipeline. The annular gas path has multiple suction ports connected to the lower chamber. An elastic sealing ring is disposed in the lower chamber, and a centering ring is clamped between the elastic sealing ring and the battery casing. A sealing nail is installed on the inner ring of the centering ring. This method achieves reliable connection of sealing nails for large cylindrical batteries, improves welding quality, reduces welding defects, and solves the problem of low yield after welding sealing nails for large cylindrical batteries.

The invention provides a microstructure electrode capable of realizing solder confinement infiltration and a preparation method thereof, a radial microgroove structure, an annular microgroove structure and a parallel line microgroove structure are sequentially engraved on the surface of the electrode to form functional combinations of different microstructures, and the microstructure electrode capable of realizing solder confinement infiltration is obtained. Fine machining of the microstructures on the surface of the electrode and functional combination of different microstructures are adopted, the wettability of the welding flux is enhanced through the radial microgroove structures in the center area, the spreading shape of the welding flux is controlled through the annular microgroove structures in the edge area, overflowing of the welding flux is restrained, and diffusion of the welding flux is guided through the parallel line microgroove structures in the connecting area. Therefore, through mutual combination and accurate processing of the microstructures with different functions, confinement infiltration of the welding flux on the surface of the electrode is realized, and the welding quality of the electronic element and the electrode is optimized.

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.

This invention discloses a lead-out terminal structure and a secondary battery, belonging to the field of secondary battery technology. It aims to solve the problems of complex manufacturing processes, poor welding reliability, insufficient sealing, uneven stress, and high internal resistance in existing secondary batteries. The lead-out terminal structure includes a battery casing and a lead-out terminal assembly disposed on its lead-out holes. The lead-out terminal assembly consists of an upper electrode post, a lower electrode post, an upper sealing gasket, a lower sealing gasket, and a positive current collector. The upper electrode post has a concave center forming a recessed portion, with a welding hole at the bottom of the recessed portion. The lower electrode post is a circular plate, fixedly connected to the bottom of the recessed portion. The upper and lower sealing gaskets are respectively disposed on the inner and outer sides of the battery casing, and are pressed together by matching sealing bevels to form a continuous sealing surface. The upper surface of the positive current collector has a protrusion and is welded to the lower electrode post. This invention simplifies the manufacturing process, reduces costs, improves welding stability, sealing, and stress uniformity. Even if defects such as weld spatter occur during the welding process, it does not affect the battery's sealing performance, reduces the battery's internal resistance, and is suitable for various types of secondary batteries.

The application relates to the technical field of welding devices, in particular to an automatic welding device suitable for distribution network trenchless construction pipelines, which comprises a fixing frame, a mounting frame, a movable frame and a positioning assembly, and welding assemblies and cleaning assemblies are arranged in the movable frame respectively. The welding assemblies and the cleaning assemblies can be freely transposed in the automatic welding device, the cleaning assemblies in the upper and lower movable frames are used to clean the welding positions of the construction pipelines, the oxidation layer, rust and coating pollutants on the surfaces of the construction pipelines are removed, the welding effect on the surfaces of the construction pipelines is improved, the welding assemblies are used to automatically weld the construction pipelines, the welding processing efficiency of the construction pipelines is remarkably improved, the automatic welding device has a small overall floor area, is very convenient to carry, does not need manual intervention during use, and the welding stability of the construction pipelines is guaranteed.

The application provides a cover plate assembly and a battery. The cover plate assembly comprises a cover, a sealing element and a limiting plate. The cover comprises a top side and a bottom side distributed along the thickness direction of the cover. The top side of the cover is provided with a mounting groove. The bottom surface of the mounting groove is provided with a through liquid injection hole. The sealing element is inserted into the liquid injection hole to seal the liquid injection hole. The limiting plate is at least partially mounted in the mounting groove. The limiting plate is located on the side of the sealing element close to the top side of the cover and is welded to the cover. One side surface of the limiting plate is provided with a groove. The groove is formed with a notch on the corresponding side surface. The minimum distance between the edge of the notch and the edge of the corresponding side surface is W. In the thickness direction of the cover, the maximum thickness of the limiting plate is D1, and 0.5D1≤W≤0.75D1. Thus, the welding stress in the limiting plate can be absorbed by the groove, the risk of excessive welding stress in the limiting plate leading to cracks at the welding seam between the limiting plate and the cover can be reduced, and the welding stability and welding strength between the limiting plate and the cover are improved.

This utility model discloses a tooling structure belonging to the field of casing deformation correction technology, specifically relating to a tooling for welding heat treatment of casing deformation correction, comprising: a base, an outer limiting ring, an inner limiting ring, a screw top seat, a double-rotating screw, and a top block; the base is located at the bottom, the casing is mounted on the base via a clamping mechanism, the outer limiting ring is fixedly mounted on the outer ring of the casing, the inner limiting ring is fixedly mounted on the inner ring of the casing, the screw top seat is mounted inside the casing via the double-rotating screw, and the top block is fixedly mounted on the base via a clamping mechanism; this utility model is a fixing tooling for welding heat treatment of casing deformation correction, which uses the base, outer limiting ring, and inner limiting ring to press the casing, while the screw top seat and double-rotating screw ensure the circumference of the casing and prevent deformation during welding, and the top block ensures that it will not move during welding, ensuring welding stability. Thus, this utility model can greatly improve welding efficiency and stability.

The utility model discloses a lithium battery protection plate welding positioning clamp which comprises a rectangular bottom support and vertical supports fixedly connected to the four corners of the rectangular bottom support, positioning screw rods are arranged on the vertical supports, a rectangular pressing frame is arranged above the rectangular bottom support, through holes are formed in the four corners of the rectangular pressing frame, and the positioning screw rods can be sleeved with the through holes. And movable pressing blocks are arranged on the inner sides of the four corners of the rectangular pressing frame, the two adjacent outer walls of the movable pressing blocks are attached to the two adjacent inner walls of the corners of the rectangular pressing frame, the upper ends of the movable pressing blocks are fixedly connected with connecting plates, and the connecting plates are elastically connected with the rectangular pressing frame. According to the welding positioning clamp for the lithium battery protection plate, the lithium battery protection plate needing to be welded can be elastically buckled and pressed on the lithium battery main body, so that the process of welding the lithium battery protection plate on the lithium battery main body is more stable.

This invention relates to an ultrasonic welding machine, comprising a frame, a three-unit lifting module, and an electric cylinder. The three-unit lifting module is movably connected to the frame and is used to move the welding head. The electric cylinder is located at the top of the frame, and its output end is fixedly connected to the three-unit lifting module to drive the lifting module to move up and down relative to the frame. By setting the electric cylinder at the top of the frame and fixing its output end to the three-unit lifting module, the electric cylinder drives the lifting module to move up and down relative to the frame, thereby moving the welding head up and down relative to the frame. In this application, the electric cylinder drive allows for precise adjustment of welding pressure and welding head pressing speed, effectively improving welding quality and stability.

The invention provides a thick plate butt weld one-side welding and double-side forming automatic submerged arc welding system, which relates to the technical field of welding automation, and comprises a front submerged arc welding module, a rear submerged arc welding module, a rear submerged arc welding module, an upper submerged arc welding module and a lower submerged arc welding module, according to the thick plate butt weld single-face welding and double-face forming automatic submerged arc welding system, the front face submerged arc welding module, the back face forming module, the attaching adjusting module, the synchronous walking module and the control module are arranged, and the welding seam position, the welding seam gap and the back face attaching state are subjected to real-time detection and linkage control in combination with the welding seam state detection module; and single-face submerged-arc welding and double-face forming of the thick plate butt welding seam are achieved. Therefore, weld joint penetration and back continuous forming can be completed without turning over workpieces and back gouging, the automation level and the production efficiency of thick plate welding are improved, and meanwhile the adaptability to assembly gap fluctuation and plate flatness deviation is improved.

The utility model discloses a lead frame for chip packaging, and belongs to the technical field of chip packaging. The lead frame comprises a base, a placing groove, a cover plate, clamping grooves and pins, wherein the placing groove is formed in the base and used for placing a chip; the cover plate is arranged at the position, corresponding to the upper portion of the placing groove, of the base; the clamping grooves are formed in the base, located on the periphery of the placing groove and distributed in a linear array; according to the lead frame for chip packaging, through the arrangement of the bonding parts, the welding positions of the gold wires and the pins can be positioned, the welding contact area of the gold wires and the pins is increased, the risk that welding spots fall off is reduced, meanwhile, through the arrangement of the buffer connecting pieces, stress generated by thermal expansion or machinery can be buffered in the welding process, and the welding quality is improved. The problem of deformation or welding spot cracking caused by stress concentration of the pins is reduced, and the reliability of the lead frame in complex environments of high temperature, vibration and the like is improved.

This invention relates to a gear welding device and method for a press, belonging to the field of press manufacturing. The technical solution is as follows: A gear welding device for a press includes a work platform with a ground rail. A transfer trolley is movably mounted on the ground rail to carry the gear to be welded. Positioners are mounted on both sides of the ground rail, each equipped with a rotatable gripper. A gantry frame is also mounted on the work platform, spanning the ground rail. A welding robot is movably mounted on the gantry frame, its movement direction being horizontal and perpendicular to the ground rail. The welding robot is equipped with a machine vision module. This solution, through the positioner grippers, can precisely achieve 180° rotation of the gear, providing a stable posture adjustment basis for double-sided welding. The welding robot, combined with the machine vision module, enables automated and high-precision acquisition of weld information, providing data support for intelligent welding path planning.

The utility model relates to the technical field of automobile exhaust, in particular to an automobile exhaust silencing bag which comprises a shell. Sound-absorbing cotton is arranged on the left side of the right end cover; a first partition plate is arranged on the left side of the sound-absorbing cotton; an air inlet mechanism is arranged on the left side of the first partition plate; a second partition plate is connected to the left side of the air inlet mechanism; a fourth partition plate is installed on the left side in the shell, an exhaust mechanism is installed between the third partition plate and the fourth partition plate, a plurality of vent holes are formed in the four partition plates, and a left end cover is connected to the left side of the shell; according to the utility model, a modular assembly and shell post-forming mode is adopted, an internal partition plate, an air inlet mechanism and an air outlet mechanism are integrated into two modules in advance, the assembly efficiency and the positioning precision are greatly improved, the modules are arranged after the shell is rolled, and the end cover is pressed and buckled, so that the accuracy and the stability of the relative positions of internal parts are ensured, and the stability and the quality of welding are improved.

The application discloses a kind of high-efficiency automatic electric arc welding equipment of electric iron accessory, and the application relates to electric iron accessory processing technical field, including processing table, processing table, clamping mechanism, positioning mechanism and adjusting frame, clamping mechanism includes rotary disc, guide disc, multiple clamping rollers, height limiting rod and transmission rod, guide disc is fixed on the top of rotary disc and is provided with spiral guide groove, multiple clamping rollers are slidably connected with guide groove by respective sliding block, when rotary disc rotates, multiple clamping rollers are driven to be synchronous and approach radially to adaptively clamp workpiece, while the inclined surface of rotary disc bottom is linked with height limiting rod by transmission rod and is pressed down to constrain workpiece height, the advantages of the present application are that: the present application can realize adaptive clamping and multidirectional reliable positioning for electric iron accessories of different shapes, and realize high-precision automatic electric arc welding of complex weld path, significantly improve production efficiency.

The utility model relates to the technical field of welding machines, in particular to a multifunctional plastic welding machine. In order to solve the problems that in an existing plastic welding technology, due to high-temperature diffusion radiation of a heating plate, the temperature in a control box is too high, the service life of an electrical element is affected, the equipment clamping space is limited, and the welding requirements of various products are difficult to meet, the following technical scheme is provided; the driving mechanism is installed on the top of the base, two sets of clamps are installed on the driving mechanism, and the driving mechanism is used for driving parts clamped by the two sets of clamps to approach to achieve welding; the heating plate is arranged between the two groups of clamps and is used for heating the welding surface of the part; the moving assembly is mounted on one side of the clamp and used for driving a heating plate to move; and the calibration mechanism is positioned between the two groups of clamps. According to the utility model, the problems of limited clamping and easy electrical damage in the prior art are effectively solved, and the practicability, the welding quality and the stability of equipment are improved.

The invention relates to the technical field of welding equipment, and provides road anti-collision fence auxiliary welding equipment which comprises a frame body, a workbench is fixedly connected to the top of the frame body, air cylinders are fixedly connected to the two ends of the bottom of the workbench, movable seats are fixedly connected to the output ends of the two air cylinders, and the two movable seats are slidably connected to the two ends of the workbench correspondingly; telescopic shafts penetrating through the movable seats are rotationally connected to the top ends of the two movable seats, positioning mechanisms are arranged at one ends of the two telescopic shafts, a welding device used for butt welding of the handrails is arranged at one end of the top of the workbench, a driving mechanism is arranged at the other end of the top of the workbench, and a cooling mechanism is arranged in the middle of the workbench. The positioning mechanism adopts the design of a pressing rod, a clamping plate and a pressure spring to quickly clamp the handrail, so that the operation error caused by manual alignment is thoroughly avoided, and the welding position precision of the stand column flange bottom plate and the anti-blocking block is ensured.

The utility model relates to the technical field of semiconductor devices, and discloses a power semiconductor device, which comprises a substrate, a chip, a power pin, a first signal pin and a second signal pin, the chip is arranged on the substrate and is electrically connected with the power pin, the first signal pin and the second signal pin; the first signal pin and the power pin are arranged on the same side surface of the substrate; the second signal pin and the power pin are arranged on different side surfaces of the substrate. The first signal pins and the power pins are arranged on the same side surface of the substrate, so that the length of a signal transmission path can be reduced, signal delay and interference are reduced, and the efficiency and reliability of signal transmission are improved. The second signal pin and the power pin are arranged on different side surfaces of the substrate, so that a multi-pin design can be realized, the welding stability of the power semiconductor device is improved, and the through-current capability and the high-power tolerance capability of the device are improved.

This invention provides a welding device for foundation pit retaining construction, relating to the field of foundation pit reinforcement mesh welding technology. It includes a welding clamp with a welding section mounted on it. The welding section is used to improve the lap joint accuracy of the reinforcing bar ends. A vertical reinforcement limiting component is mounted on the welding section, which limits the spacing of the vertical reinforcement bars. An anti-bending support is mounted on the welding clamp. A lower weld protection component is mounted on the welding section. Welding guides are mounted on the welding clamp and the welding section. This addresses the problems of current foundation pit retaining construction welding devices, which make it inconvenient for workers to first clamp the horizontal reinforcing bar ends before performing double-sided welding, and also make it inconvenient to check the lap joint accuracy of the horizontal reinforcing bar ends.

The utility model discloses a kind of robot welding devices for aluminum profile processing, it is related to welding device technical field, including substrate, the top of substrate is provided with robot assembly, the left side of substrate is provided with workbench, the left side top of workbench is provided with first clamping assembly, the right side top of workbench is provided with second clamping assembly, substrate front side left end is provided with operation table;By being provided with first clamping assembly, by four groups of first telescopic cylinder respectively drive movable rod, by the rotation cooperation of movable rod and fixed plate, make clamping plate from multiple directions to rectangular aluminum profile is stably clamped, the effect that rectangular aluminum profile can be reliably fixed is realized, second, by being provided with second clamping assembly, by two groups of second telescopic cylinder drive connecting frame, make rotating part rotate in mounting plate notch, and then drive connecting plate and press plate to press down, the effect that sheet aluminum profile is effectively pressed and fixed is realized, improve welding quality and stability.

The embodiment of the present disclosure relates to the technical field of steel bar welding, and one embodiment of the present disclosure provides a steel bar butt welding equipment capable of achieving uniform welding, which comprises two left electrodes and two right electrodes, a butt welding frame, two electrode bearing parts and two steel bar conveying assemblies. The two electrode bearing parts are symmetrically arranged, each of the electrode bearing parts is provided with a left electrode and a right electrode, the right electrode can slide towards the left electrode, one of the electrode bearing parts is arranged on the butt welding frame, and the other electrode bearing part is arranged on the butt welding frame through an electrode position adjusting part. The two steel bar conveying assemblies are symmetrically arranged on the butt welding frame, and the electrode bearing parts are located between the two steel bar conveying assemblies. Through the above technical scheme, the steel bar butt welding equipment in the prior art is improved, the steel bar conveying precision and stability are improved during steel bar butt welding, and the problem that the steel bar welding efficiency is affected is solved.

The utility model discloses a solder strip control mechanism and a solder strip preparation device, and relates to the technical field of battery string production, the solder strip control mechanism comprises a left baffle plate and a right baffle plate which are attached to each other, and a driving part which is in driving connection with the left baffle plate and the right baffle plate, the left baffle plate is provided with a plurality of first blocking pieces, and the right baffle plate is provided with a plurality of second blocking pieces; grooves with opposite openings are formed in the first blocking piece and the second blocking piece correspondingly, a welding strip containing cavity is formed between the two oppositely-arranged grooves, and the driving component is used for driving the left baffle and the right baffle to move horizontally so that the groove in the first blocking piece and the groove in the second blocking piece can get close to each other or get away from each other. The width of the solder strip contained in the solder strip containing cavity can be adjusted through the driving component so as to adapt to solder strips of different specifications, meanwhile, a small gap between the solder strip containing cavity and the solder strip can be controlled to be kept, the position of the solder strip in the solder strip containing cavity is accurately controlled, the welding position of a battery string is correctly in butt joint, and the welding quality of the battery string is improved.

This invention discloses a laser-arc flexible heat source multi-degree-of-freedom real-time adjustable intelligent welding torch and a real-time dynamic control method. The arc welding torch mounting assembly of this invention is compatible with both TIG and MAG welding torches. The laser head mounting assembly and the arc welding torch mounting assembly are mounted on the main support of the welding torch, and a multi-degree-of-freedom electrified control mechanism is used to precisely adjust the distance and angle between the laser heat source and the arc heat source in real time and dynamically. The laser vision sensing system is mounted in front of the intelligent welding torch to detect the weld trajectory and bevel assembly accuracy in real time, and relies on the welding quality closed-loop control system to issue welding process control commands to the electrified control mechanism of the intelligent welding torch and the welding equipment. This invention realizes the electrified flexible control of the spatial position and angle of the laser-arc flexible heat source, which can flexibly construct laser-TIG or laser-MAG flexible welding heat sources, significantly broadening the welding process window under complex working conditions and improving the intelligence level of the welding process.

The utility model discloses a magnetic swing narrow gap welding mechanism for welding the narrow gap groove of workpiece, the magnetic swing narrow gap welding mechanism includes arc tracking slide, the support frame of connection in arc tracking slide and the servo wire feeder, guide mechanism and narrow gap welder of fixed on support frame in the tungsten electrode of narrow gap welder is equipped with the extension to the upper surface of narrow gap groove, servo wire feeder is sent to the narrow gap groove below tungsten electrode in the tungsten electrode through guide mechanism, and the tungsten electrode generates arc to make the welding wire form the welding pool in the narrow gap groove. The magnetic swing narrow gap welding mechanism includes the magnetic control device of fixed on support frame, the magnetic control device is equipped with the magnetic head of the end of downward extension and adjacent tungsten electrode, the magnetic head generates the lateral magnetic field of periodic change, to make the arc of tungsten electrode swing regularly in the lateral deflection, can realize the efficient narrow gap welding to improve the welding quality and stability.

This utility model discloses an ultrasonic welding fixture for ion exchange resin, including a base and a cap. The base has a first base plate and a second base plate arranged concentrically. The first base plate has a circular groove in its center for accommodating the ion exchange resin. The second base plate surrounds the first base plate, forming an annular platform for positioning the substrate layer. The cap has an annular structure with a central through hole. The inner wall of the cap has pressure teeth. The cap and the base form a rotating pair. Through rotational engagement, the pressure teeth fully contact the welding surface of the substrate layer and generate a squeezing effect, driving the PP filter cotton and PET mesh to rotate and form a spiral pattern, forming an annular thickened welding layer. Through the above method, this utility model's ultrasonic welding fixture for ion exchange resin forms a local annular thickened layer in the welding area by spin forming, improving welding strength and sealing performance. The material usage increases by only 2-3%, greatly reducing material costs. The fixture is simple and durable, has high production efficiency, and reduces overall costs.

The application provides a battery through-wall welding pretreatment device and method, and belongs to the technical field of battery production. The battery through-wall welding pretreatment device comprises a frame body, a pre-pressing clamp, a temperature testing assembly and a resistance testing assembly. The pre-pressing clamp comprises two clamp plates which are oppositely arranged and used for clamping on both sides of the intermediate pole column. The temperature testing assembly comprises a semiconductor heating sheet and an infrared detector. The resistance testing assembly comprises a pre-pressing welding point arranged on the working surface of the clamp plate and a resistance tester arranged on the frame body. The battery through-wall welding pretreatment device provided by the application can detect and adjust the temperature of the intermediate pole column through the semiconductor heating sheet and the infrared detector, and detect the resistance value of the intermediate pole column through the pre-pressing welding point and the resistance tester. The intermediate pole column after pretreatment meets the requirements of temperature and resistance value, and then directly undergoes through-wall welding. The welding quality and efficiency of the through-wall welding can be improved.

This invention discloses a vacuum diffusion welding method for joining stainless steel sandwich structures, belonging to the field of metal joining technology. This method effectively solves the problems of severe edge deformation and wrinkling, and unstable welding quality during stainless steel joining by optimizing pretreatment, assembly methods, gasket design, and welding process parameters. The method includes steps such as material preparation, pretreatment, assembly, vacuum diffusion welding, cooling, and inspection. This invention can improve welding quality and stability, achieving wrinkle-free edges.