37results about How to "Reduce welding costs" patented technology

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 a welding tool for a module signal terminal, which comprises a welding tool body used for clamping when signal terminal reflow soldering is carried out on a power module, and the welding tool body is arranged on a substrate of the power module. The welding tool body is composed of a first cover plate and a second cover plate which are sequentially arranged from top to bottom and are the same in shape, a plurality of installation through holes corresponding in position are formed in the first cover plate and the second cover plate respectively, and metal blocks with the same number as the through holes are installed at the positions, between the first cover plate and the second cover plate, of the installation through holes respectively. The metal block is fixedly connected with a positioning column installed in a positioning hole of the substrate through a bolt and a gasket, the first cover plate and the second cover plate are further provided with a plurality of open holes corresponding in position, the positions of the open holes correspond to the positions of signal terminals on the substrate, and the open holes are used for conveniently inserting the signal terminals. And the head part and the tail part of the signal terminal are respectively positioned through the first cover plate and the second cover plate.

The invention discloses an automatic welding device and method suitable for saddle-shaped welds, which belongs to the technical field of saddle-shaped weld processing, and comprises a main pipe, a branch pipe, a positioner, a support assembly, a welding robot, a battery module and an overall control and simulation analysis system, wherein the main pipe is mounted on the positioner and the support assembly, the branch pipe is perpendicular to the outer surface of the main pipe, the cutting angles of the hole groove at the lower end of the branch pipe and the hole groove cut in the wall thickness direction of the main pipe are both 30°, and a gap is left between the two hole grooves, a welding gun, a contact sensor and a laser scanning device are arranged at the front end of the welding robot, and an arc voltage tracker for real-time monitoring of the welding voltage is arranged in the battery module, and through the invention, a working mode of continuous automatic welding can be achieved for pipes with different wall thicknesses, manual operation can be avoided, labor costs can be reduced, time and labor can be saved, welding difficulty can be reduced, welding efficiency can be improved, and safety risks can be reduced.

The application discloses a sheet type radiator and a welding method. The sheet type radiator comprises a collecting pipe, radiating fins and a spoiler. The spoiler is welded on both sides of the radiating fin, and the length of the spoiler is equal to that of the radiating fin. The radiating fin is slidably connected with the collecting pipe through tile pipes, and the adjacent two tile pipes are clamped. The welding method is as follows: the two ends of the radiating fin are welded with the tile pipes respectively, the spoiler is welded with the radiating fin, and the two tile pipes on the outermost side are welded with the collecting pipe after the tile pipes are installed on the collecting pipe. Only one spoiler is welded on one side of each radiating fin, and the two ends of the spoiler are welded with the radiating fin. The welding area is small, the welding cost is reduced, the production efficiency is improved, the spoiler is welded with the radiating fin first, then the radiating fin is connected with the collecting pipe, the interval between the adjacent two radiating fins is not limited, the welding is convenient, the firmness of the welding mark can be easily detected, and the overall quality of the sheet type radiator is effectively improved.

The solid-liquid phase change cavity structure comprises a phase change box body, a phase change cavity is formed in the phase change box body, a small stand column is arranged in the phase change cavity, a pouring hole is formed in one end of the bottom of the phase change box body, an exhaust hole is formed in the other end of the bottom of the phase change box body, and the pouring hole and the exhaust hole are connected to the phase change box body. The upper end of the phase change box body is covered with a cover plate, the pouring hole and the exhaust hole are further connected to an adapter, the stand column is directly milled, the machining cost of foamed aluminum is removed, and the machining risk is reduced; the upper surface of the cavity stand column and the periphery of the cavity are all brazed with the cover plate, contact is good, thermal resistance is small, the heat conductivity coefficient is high, pouring holes in the cover plate are not directly machined any more, an adapter is adopted for extending a pipeline, and the thickness of raw materials is reduced by at least 8 mm; a pouring hole welding plug is changed into a self-made aluminum screw and a silicon rubber O-shaped sealing ring, the machining cost is similar, poor pores caused by paraffin volatilization in the welding process are avoided, and the percent of pass is increased. And the welding cost is reduced.

The present application relates to the technical field of welding, and provides a pipeline welding method, device, equipment, storage medium and program product. The method comprises the following steps: controlling a grabbing device to grab a first welding ring until the first welding ring is sleeved outside a mandrel; controlling the grabbing device to grab a pipeline to be welded until a first pipeline opening of the pipeline to be welded is sleeved outside the mandrel; controlling a pushing plate to push the first welding ring until the first welding ring is sleeved outside a first welding position of an outer wall of the pipeline to be welded; controlling the grabbing device to grab the pipeline to be welded with the first welding ring sleeved thereon until the first pipeline opening of the pipeline to be welded is connected with a pipeline joint; the first welding position is located at a first connection position of the first pipeline opening and the pipeline joint; and controlling a welding device to perform welding at the first connection position. The present application can automatically complete pipeline welding by controlling various devices, thereby improving the pipeline welding quality, reducing the pipeline welding cost, and avoiding safety risks caused by manual welding.

The present application belongs to welding process, and particularly relates to a narrow-gap all-position TIG automatic welding process. The narrow-gap all-position TIG automatic welding process comprises the following steps: 1) performing backing welding on a root bevel and a bottom of the bevel; 2) performing filling welding on a lower bevel and a groove, wherein the filling welding is single-layer multi-pass welding; and 3) performing covering welding on a top of the groove, wherein the covering welding adopts linear welding or oscillating welding. The present application has the following beneficial effects compared with the prior art: the groove of the narrow-gap automatic welding process is narrow, the filling amount of the welding deposited metal is small, and the welding cost is relatively low. The weld is lossless, and the pass rate of the physical and chemical detection is relatively high.

The utility model relates to titanium membrane and titanium alloy flange vacuum sealing welding technical field, especially to a kind of extremely thin titanium membrane and titanium alloy flange vacuum sealing welding structure, including titanium alloy flange, titanium alloy flange side is provided with titanium membrane, titanium alloy flange side away from titanium alloy flange is provided with titanium alloy pressure ring, titanium alloy flange and titanium membrane are connected by connecting mechanism one, titanium membrane and titanium alloy pressure ring are connected by connecting mechanism two, the both ends of titanium membrane are also provided with sealing ring, sealing groove is provided with sealing pad in the inside.The utility model solves titanium membrane and titanium alloy welding sealing, does not reduce the mechanical strength of titanium membrane, simultaneously shortens welding cycle, reduces welding cost, titanium membrane is matched thickness titanium alloy pressure ring in welding process, internal continuous argon protection in welding process, simultaneously by setting connecting mechanism one and connecting mechanism two, effectively improve the stability that titanium membrane is connected with titanium alloy flange and titanium alloy pressure ring respectively, to further enhance the firmness of welding.

This invention discloses a welding method for 9Cr-1Mo steel and 20MnMo steel. The welding method includes the following steps: S1, overlaying a transition layer; S2, cutting the transition layer; S3, machining the bevel of the transition layer side; and S4, butt-jointing the transition layer with the 20MnMo steel side. This welding method for 9Cr-1Mo steel and 20MnMo steel solves the problem of difficult welding of these two steels. Using alloy steel as the transition layer reduces welding costs, simplifies welding difficulty, and improves production efficiency.

The utility model discloses a coupling feed structure and a base station antenna unit, the coupling feed structure comprises a first signal conduction band and a second signal conduction band, one end of the first signal conduction band is used for connecting a radiation unit, and one end of the second signal conduction band is used for signal feed-in. The other end of the first signal conduction band and the other end of the second signal conduction band are oppositely arranged and a gap is formed therebetween; through the above structure, in the whole feed process, the feed of the antenna utilizes the coupling effect brought by the coupling structure, electroplating welding is not needed, the assembly efficiency can be improved, and the welding cost can be saved.

The spherical support comprises an upper support, a lower support and a spherical crown arranged in the top of the lower support, a plane friction pair is connected between the top of the spherical crown and the bottom of the upper support, and a curved surface friction pair is connected between the spherical crown and the lower support. The plane friction pair comprises an oval plane sliding plate fixed to the bottom of the upper support and a round plane on the top of the spherical crown. The oval plane sliding plate can move on the round plane in the long-axis or short-axis direction of the oval plane sliding plate. Limiting stop blocks are arranged on the two sides, in the short axis direction of the oval plane sliding plate, of the bottom of the upper support. According to the method, the problem of welding a plane stainless steel plate is solved, the troubles of unstable welding quality, easy generation of welding defects and the like caused by a welding process are avoided, meanwhile, the corresponding welding cost and time cost are reduced, and the manufacturing and mounting processes of the support are simpler, more convenient and more efficient.

The invention discloses a steel structure welding device which comprises a first supporting table, a second supporting table, an overturning auxiliary part, a limiting supporting part, a welding seam protection assembly, a steel plate overturning assembly and a welding gun. The overturning auxiliary part comprises a first overturning block, and a first limiting groove is formed in the first overturning block; the limiting supporting piece is slidably arranged on the second supporting table. The welding seam protection assembly is arranged on the first overturning block; the steel plate overturning assembly comprises an overturning support, a third electric telescopic rod, a winding piece and a magnetic block, the third electric telescopic rod is arranged on the overturning support, and the third electric telescopic rod is connected with the winding piece; the furling piece is arranged on the overturning bracket in a sliding manner; a rope is arranged on the magnetic block and is connected with the winding piece; and the welding gun is arranged on one side of the overturning bracket, so that the welding cost of the steel plate is reduced, and the overturning welding quality of the steel plate is ensured.

The utility model discloses a kind of battery data acquisition module, comprising: for detecting battery module data data acquisition module, including with nickel sheet terminal welded aluminium bar;With nickel sheet terminal between welding adapter PCB board, the upper end of the adapter PCB board is welded with the solder pad of array distribution;Paste in the middle part of adapter PCB board NTC thermistor;Fuse is set in the upper end of adapter PCB board and is communicated with voltage acquisition circuit and plays the role of fuse), can solve space occupation contradiction: discrete acquisition terminal needs to be laid out twice on the limited aluminium bar surface, leading to redundant structure, causing aluminium bar surface structure complicated irregular;Processing complexity is high: voltage terminal welding is executed in succession, welding is carried out in temperature acquisition, wherein the overlap rate of secondary heating influence area reaches 40%, leading to the mechanical property of aluminium bar (such as hardness reduction, brittleness increase) decline, while increasing the subsequent quality inspection process problem.

The invention relates to the field of welding processing technology of steel, and discloses a composite welding method of an austenitic stainless steel plate, which comprises the following steps: step 1, preparing two plate materials, and processing the end part of each plate material to form a U-shaped groove and an I-shaped groove; secondly, the groove ends of the two plate materials are assembled to form an assembly body, and the I-shaped grooves of the two plate materials are arranged in an attached mode; 3, the assembly is placed in a working chamber, the assembly is heated to a preset temperature, and the working chamber is vacuumized to a preset vacuum degree; fourthly, the assembly is welded through electron beam welding; 5, machining the excess weld metal of an electron beam welding seam, and enabling the transition position of the U-shaped groove and the I-shaped groove to be in smooth transition; and sixthly, filler wire welding is conducted on the U-shaped groove of the assembly. Therefore, the two plates are welded through the welding method combining electron beam welding and wire filling welding, the welding requirement for the plates with the large thickness (such as the plates with the thickness larger than 160 mm) can be met, and the welding efficiency and the welding seam quality are improved.

The utility model discloses a roller shell surfacing device which comprises a chuck, a baffle is arranged on the edge of the chuck in a sleeved mode, a plurality of installation grooves are formed in the bottom face of the baffle, a fan is fixedly connected in each installation groove, a collecting ring is detachably connected to the baffle, and grooves communicated with the installation grooves are formed in the collecting ring. Powder scattered on the edge of the chuck enters the groove through the fan, waste caused by the fact that the powder is sprayed out of the chuck and influences collection can be effectively avoided by arranging the baffle, the fan can adsorb the powder scattered on the edge of the chuck into the groove to be collected, and therefore waste of the powder is avoided, and the surfacing welding cost is effectively reduced.

This invention belongs to the field of solenoid valve technology, specifically providing a solenoid valve. The invention aims to solve the problem of high processing costs in existing solenoid valves. To this end, the solenoid valve of this invention includes a valve body, a valve core, and an elastic member. The valve body defines a first inlet / outlet, a second inlet / outlet, and a receiving cavity. The valve core is movably disposed in the receiving cavity, dividing the receiving cavity into an inlet / outlet communication area and an inlet / outlet isolation area, the inlet / outlet communication area being connected to the first and second inlets / outlets respectively. The elastic member is arranged in the inlet / outlet isolation area and includes a fixed ring fixedly connected to the valve body and multiple elastic arms fixedly connected to or integrally formed with the fixed ring. The elastic arms extend radially inward toward the valve core and abut against the valve core, so that the elastic member drives the valve core through the elastic arms to block the air passage between the first and second inlets / outlets. This invention reduces the processing cost of the solenoid valve.

The invention discloses a stainless steel composite plate welding method considering welding deformation control and welding efficiency. The stainless steel composite plate welding method comprises the following steps that (1) a stainless steel composite plate to be welded comprises a base layer and a composite layer; the base layer is carbon steel and the composite layer is stainless steel; (2) the two stainless steel composite plates to be welded are subjected to positioned welding assembly, the positioned welding assembly gap is controlled to be (0.2-0.3) b2 mm, and b2 is the thickness of the base layer; and (3) the stainless steel composite plate is welded, stainless steel composite plate welding seams comprise a base layer carbon steel welding seam, a transition layer stainless steel welding seam and a composite layer stainless steel welding seam, and each layer of welding seam only has one welding bead. The comprehensive welding quality (good corrosion resistance and mechanical property), welding deformation control, welding efficiency and cost of the stainless steel composite plate are considered; the method is suitable for connection of medium-thickness single-face stainless steel composite plates applied to the fields of petroleum, chemical engineering, light industry, ocean engineering, nuclear industry and the like.

The utility model discloses a kind of rotary open type profile die upper die device, upper die stop block and upper die connecting block are fixed in the bottom of upper die plate both sides, a through hole is equipped in sliding stop block, bolt I is connected with the front side of upper die stop block by passing through through hole;In the oblique lower side of through hole, a threaded hole is provided in sliding stop block, the end of bolt II is threadedly connected in the threaded hole;Fixed shaft is threadedly connected in the front side of upper die stop block;Upper die stop block is a rectangular block, the side of rectangular block is equipped with protruding step portion;The horizontal portion of upper die connecting block is installed with a shaft sleeve, shaft sleeve can rotate and slide in the inner hole of upper die connecting block, bolt is cooperatively connected in shaft sleeve;The lower side of upper die connecting block horizontal portion is provided with an upper die, one end of upper die is fixed below upper die connecting block by bolt, the other end of upper die is attached to the step portion of upper die stop block, sliding stop block fixes the end of upper die.The utility model can effectively realize simple, convenient, efficient stamping non-standard square steel.

The utility model relates to the technical field of welding automation, concretely is a kind of welding auxiliary device of adjusting flux supply quantity, the core technical effect of the device is reflected in two aspects of accurate feeding and efficient recovery, the design of cylinder drive baffle, lock pin positioning in feeding module, accurately control flux flow;Vibration module utilizes driving motor to drive cam to make conveying pipeline vibrate, ensure that flux is smoothly conveyed to welding interface, in the recovery aspect, the air pump of power module provides suction force for collection head, and excess flux is quickly recovered, and the filter screen in recovery pipeline effectively filters impurities, realizes flux purification and reuse, improves resource utilization, reduces welding cost.

The invention belongs to the technical field of wind power equipment machining, and provides a circumferential weld joint welding heat preservation device and a welding method in wind power equipment machining. The heat preservation shell comprises a first shell body and a second shell body which are connected with each other. A first connecting piece is arranged at the end part of the first shell, and a second connecting piece is arranged at the end part of the second shell; a first pressure release valve is arranged on the first shell, and a second pressure release valve is arranged on the second shell; during welding, the first shell and the second shell are separated at the joint, a welding gun is inserted into the joint of the first shell and the second shell for welding, welding of the welding gun and closing of the first shell and the second shell after welding are met through closing of the first shell and the second shell at the joint, and the purpose of continuous heat preservation is achieved; by means of the heat preservation shell, heat generated by welding is used for directly conducting heat preservation on a welding seam, the heating link is replaced, on the basis that resources and cost are saved, a good working environment is provided, and the machining risk is reduced.

The application discloses a hot air output device for a drying equipment, which comprises a peripheral plate assembly, a bottom surrounding plate assembly, a nozzle assembly and an inner connecting plate. The peripheral plate assembly comprises a top plate and side plates arranged on both sides of the top plate. The bottom surrounding plate assembly comprises a bottom plate connected with the side plates. The top plate, the side plates and the bottom plate enclose an air inlet cavity. The inner connecting plates are arranged between the two side plates and are distributed along the length direction of the bottom plate. The bottom of the inner connecting plate is inserted into the bottom plate, and the two sides of the inner connecting plate are respectively inserted into the two side plates. The nozzle assembly comprises an insertion slot and a nozzle. The two sides of the communication hole can be inserted into the insertion slot to form a connection. The application can stably connect, is not easy to deform, is convenient to assemble, and can save assembly time and processing cost.

This application relates to a fixing structure for an electric vehicle air switch and an electric vehicle, belonging to the field of electric vehicles. The fixing structure includes a seat, an air switch component, and an adapter bracket. The bottom wall of the seat has mounting holes and a snap-fit ​​assembly, with the snap-fit ​​assembly spaced apart from the mounting holes. The adapter bracket includes a first bracket and a second bracket, connected at an angle. The first bracket is detachably connected to the snap-fit ​​assembly, and the second bracket is opposite to the mounting holes. The air switch component is detachably connected to the second bracket and inserted into the mounting holes. The fixing structure for an electric vehicle air switch provided by this application solves the technical problems of high installation cost and poor installation accuracy of air switches in the prior art.

The invention discloses a welding seam inner side inert gas conveying device during tank body connecting pipeline welding, which comprises an inner side protection fixing piece, a first inner side protection transmission piece and a first welding seam inner side buckling piece, the inner side protection fixing piece comprises a fixed inner side protection supporting piece, a first inner side protection transmission piece and a first welding seam inner side buckling piece, the first inner side protection transmission piece is arranged on the fixed inner side protection supporting piece, and the first welding seam inner side buckling piece is arranged on the first inner side protection transmission piece; the connected first welding seam inner side buckling piece is pushed; the inner side protection moving part comprises a movable inner side protection supporting part, a second inner side protection transmission part and a second welding seam inner side buckling part, and the movable inner side protection supporting part is arranged on the fixed inner side protection supporting part and drives the second inner side protection transmission part connected with the movable inner side protection supporting part to slide in the axial direction; the second inner side protection transmission piece drives the connected second welding seam inner side buckling piece to stretch out and draw back in the radial direction; and an inert gas supply member. The device is reasonable in structural design and good in inert gas protection effect on welding seams, the welding seam quality is remarkably improved, and the inert gas consumption and the welding cost are remarkably reduced.

This invention belongs to the technical field of welding equipment, specifically disclosing an intelligent welding device for the steel frame track beam of a movable and retractable pedestrian overpass. The device includes a gantry frame with slide rails slidably connected to both ends of its bottom. A robotic arm is slidably connected to the bottom of the top of the gantry frame, and a welding head is rotatably connected to the bottom of the robotic arm. The robotic arm can drive the welding head to weld the steel frame track beam. A piston pump is fixedly connected to a crossbeam on one side of the gantry frame. A telescopic mechanism is fixedly connected to the top of the welding head, and a dry cleaning mechanism is fixedly connected to one end of the telescopic mechanism. The telescopic mechanism drives the dry cleaning mechanism to extend and retract. Through the coordinated operation of the telescopic mechanism, the dry cleaning mechanism, the wet cleaning mechanism, and the impurity collection mechanism, the welding device can automatically clean itself before and after welding, thereby reducing manual intervention, not delaying welding time, and improving welding efficiency.

This invention relates to the field of vacuum glass production and discloses a vacuum glass sealing device, including a worktable with multiple rows of synchronously rotating rollers, a positioning groove and a limiting groove located between the rollers, a positioning component for longitudinally positioning the glass in the positioning groove, and a limiting component for laterally limiting the glass in the limiting groove, as well as two liftable conductive probe assemblies and a pressure application component. This invention not only simplifies and reduces the cost of metal edge sealing of vacuum glass but also facilitates large-scale production. Therefore, this invention is of great significance for reducing vacuum glass production costs, minimizing environmental pollution, and expanding the application range of vacuum glass. This invention overcomes the shortcomings of traditional sealing methods, such as high sealing temperatures, complex processes, and stringent sealing conditions, improving the sealing quality and production efficiency of vacuum glass, and is suitable for widespread application.

The present application relates to the technical field of automobile differential, and particularly relates to an assembling method of a laser-welded differential assembly, a welding groove is formed along an axial direction at a connecting position of a main reduction driven gear and a differential housing, the main reduction driven gear and the differential housing are welded at the welding groove by a laser filler wire welding mode, and the welding groove is provided as an asymmetric structure, wherein a welding wire in the laser filler wire welding is a nickel-based welding wire, the welding groove is a Y-shaped groove in an asymmetric structure, the Y-shaped groove comprises a gear side slope surface and a housing side slope surface at an opening end, and the gear side slope surface and the housing side slope surface meet into a welding through hole extending along the axial direction at a side away from the opening. The present application provides a relationship of welding performance of the differential housing material, a method for calculating a carbon equivalent of spheroidal graphite cast iron welding, and a welding guidance method. The assembling between the differential housing and the main reduction driven gear is performed by the laser filler wire welding technology, so that the cost can be reduced, the light weight can be realized, and the reliability can be enhanced.

The present application relates to the field of vacuum glass production, and discloses a vacuum glass sealing process, which utilizes a conductive probe to contact a solder strip from an edge apex, uses the solder strip as a conductor to form a closed circuit, and generates heat in the solder strip itself during electrification to melt the solder strip, and a pressing assembly is used to press the solder strip to tightly combine with a glass silver paste layer. The present application can not only realize the convenience and low cost of vacuum glass metal sealing edges, but also easily realize large-scale production. Therefore, the present application has important significance for reducing the production cost of vacuum glass, reducing environmental pollution, and widening the application range of vacuum glass. The present application overcomes the defects of high sealing temperature, complex process, harsh sealing conditions and the like in the traditional sealing method, improves the sealing quality and production efficiency of vacuum glass, and is suitable for popularization and application.

The invention discloses an argon conveying device which is used for conveying argon to opposite welding end faces of two pipelines. Comprising a sealing film used for blocking a cavity on the inner side of the welding end of one pipeline, a moving device capable of moving relative to the sealing film in the other pipeline, and a gas supply device capable of supplying argon to the position between the sealing film and the moving device, and the moving device comprises a cylinder; and the cylinder body of the cylinder is made of a flexible film. The sealing film is arranged at the end of the pipeline, the movable cylinder is used for limiting the argon storage area at the welding seam of the pipeline, argon protection welding of the welding seam can be achieved only by filling argon into the limited area, the using amount of argon is reduced, the welding cost is reduced, and the welding quality is improved through deformation of the cylinder. The cylinder can be used for conveying argon and can also be used for reducing the pipe diameter so as to reduce the use amount of argon.

The utility model discloses a chemical pressure pipeline argon arc welding argon atmosphere formation device, including walking mechanism that can walk in the pipeline, and walking mechanism includes argon exhaust pipe, a plurality of argon exhaust structures are connected with on the argon exhaust pipe, the gas inlet end and the gas outlet end position of argon exhaust pipe are connected with first plugging air bag and second plugging air bag respectively, and the driving gyro wheel structure is assembled to be connected with on the argon exhaust pipe. The above structure realizes the movement in the pipeline to the welding area in the walking mode, forms the high argon atmosphere after forming the local sealed environment, and the method not only saves argon, and its welding construction difficulty is reduced greatly.

A welding area is arranged on one side of a circuit board, a shunt is connected with the circuit board through the welding area, the welding area comprises segmentation bonding pad areas, the left side and the right side of the middle of the circuit board are provided with the segmentation bonding pad areas, and the shunt is connected with the circuit board through the segmentation bonding pad areas. The welding pad is arranged to be the square single-point welding pad, the cross-shaped flow channel is formed, bubbles generated during welding in the peripheral direction can be conveniently dissipated, tin overflowing is prevented, the yield is greatly improved, meanwhile, the square single-point welding pad is slow in heat dissipation and low in welding temperature, existing gas-phase welding can be replaced with reflow welding, and the welding cost is greatly reduced; a temperature monitoring area is arranged to facilitate monitoring of the temperature of the shunt.