134results about How to "Reduce welding costs" patented technology

The invention relates to the technical field of angle steel tower welding, in particular to an angle steel tower base automatic welding system and method.The angle steel tower base automatic welding system comprises a base and a storage table and further comprises a controller, a welding mechanism, a splicing mechanism and a limiting mechanism; the splicing mechanism comprises a driving assembly, four pushing assemblies and eight electric clamping jaws, the limiting mechanism comprises a tightening block, an abutting assembly and a lifting assembly, an L-shaped rod is fixedly arranged at the top of the workbench, and the tightening block is fixedly arranged at the bottom of the lifting assembly. Through multi-directional abutting limiting, the shapes and the relative positions of the bottom plate and the four rib plates can be effectively controlled, internal stress generated by heating in the welding process of the four rib plates and the bottom plate is balanced, welding deformation is prevented, and then the welding effect is improved.

The invention discloses an automatic welding device and method suitable for a saddle-shaped welding seam, and belongs to the technical field of saddle-shaped welding seam machining.The automatic welding device comprises a main pipe, a branch pipe, a positioner, a supporting assembly, a welding robot, a battery module and an overall control and simulation analysis system.The main pipe is erected on the positioner and the supporting assembly, and the branch pipe is perpendicular to the outer surface of the main pipe; the cutting angle of a hole groove in the lower end of the branch pipe and the cutting angle of a hole groove cut in the wall thickness direction of the main pipe are both 30 degrees, a gap is reserved 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 monitoring welding voltage in real time is arranged in the battery module. The working mode of continuous automatic welding can be achieved for pipelines with different wall thicknesses, manual operation is avoided, the labor cost is reduced, time and labor are saved, the welding difficulty is reduced, the welding efficiency is improved, and the safety risk is reduced.

The invention discloses a welding robot system based on visual guidance, which comprises an artificial potential field welding robot path planning algorithm, the artificial potential field welding robot path planning algorithm is combined with an ant colony algorithm, and the artificial potential field welding robot path planning algorithm and the ant colony algorithm comprise artificial potential field function simulation, ant colony algorithm simulation and path search, pruning strategy and path optimization mechanism. And the step operation system (GBOS) comprises three-dimensional model importing and welding seam positioning. According to the method, the welding path planning technology of the ant colony algorithm of the artificial potential field function is fused, the welding robot is guided to avoid obstacles by simulating attraction force and repulsive force, the optimal path can be accurately recognized, the coverage rate of the searched path to the environment can reach 74.63%, a good convergence curve can be obtained, and after the pruning strategy is introduced, the optimal path can be obtained. According to the method, the path can be optimized, redundant broken lines or path sections are removed, and optimization of the path length and complexity is achieved, so that the welding time and cost are reduced, and the welding efficiency is improved.

The invention discloses a welding method for a nickel-based alloy composite board. The nickel-based alloy composite board comprises a base material layer and a nickel-based alloy composite material layer, and a transition layer is arranged at the bonding interface of the base material layer and the nickel-based alloy composite material layer. Wherein a trapezoidal groove is machined in the position, corresponding to the base material layer, of the welding section of the nickel-based alloy composite board; a U-shaped groove is machined in the position, corresponding to the transition layer, of the welding section of the nickel base alloy; a groove is not machined in the position, corresponding to the nickel-based alloy composite material layer, of the welding section of the nickel-based alloy composite plate; a nickel-based alloy welding wire matched with the nickel-based alloy composite material layer is used, single argon tungsten-arc welding is adopted for welding the nickel-based alloy composite material layer, and a composite material layer welding seam is formed; a nickel-based alloy welding wire matched with the nickel-based alloy composite material layer is used, the transition layer is welded through single argon tungsten-arc welding, and a transition layer welding seam is formed; and the base material layer is welded to form a base material layer welding seam, and double-tungsten-electrode argon arc welding is adopted for welding the first welding bead of the base material layer.

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 discloses a spiral supporting plate of a stirrer and a supporting plate welding tool, and belongs to the field of stirrer accessory machining. The spiral supporting plate of the stirrer is formed by welding and connecting at least two spiral panels in a spiral shape end to end, each spiral panel comprises a first end plate and a second end plate which are integrally connected to the two ends of the spiral panel, and the first end plate and the second end plate are arranged to be an arc-shaped horizontal plane and an arc-shaped inclined plane respectively. During production, the multi-spiral-layer spiral supporting plate can be split into a plurality of single-layer even half-layer spiral panel units; during welding, the first end plate of one spiral panel and the second end plate of the other spiral panel can be welded and fixed after being flatly laid on the special welding platform side by side, operation is easy, welding cost is low, and precision is high. The problems that an existing stirrer spiral supporting plate is high in production cost due to integrated production, and consistency of design parameters is difficult to guarantee due to split production are solved.

The utility model discloses a single battery, a battery and a power utilization device, the single battery comprises a shell, an electrode assembly and an end cover, the shell is provided with a containing cavity and a mounting port communicated with the containing cavity, the electrode assembly is arranged in the containing cavity, the end cover is assembled at the mounting port along a first direction, the end cover is connected with the shell in a second direction, and the end cover is arranged in the containing cavity. A containing part is arranged in the connecting area of the end cover and the shell and suitable for containing welding flux, and an included angle is formed between the first direction and the second direction. According to the battery monomer disclosed by the embodiment of the invention, the accommodating part is arranged, and the accommodating part is suitable for accommodating the welding flux for welding, so that the expected weld penetration depth and weld width can be achieved, the welding strength is improved, high-power welding equipment does not need to be adopted or the power of the welding equipment does not need to be increased, and the welding cost can be reduced; the thermal stress and the welding stress in the welding process are improved, the deformation of the battery monomer is reduced, and the durability and the reliability of the battery monomer are improved.

The invention relates to a 1500MPa deep sea steel welding material with the thickness larger than 30mm and a welding method of the 1500MPa deep sea steel welding material. The welding wire is prepared from, by mass, 0.08%-0.13% of C, 1.2%-1.6% of Mn, 0.3%-0.6% of Si, smaller than or equal to 0.002% of S, smaller than or equal to 0.005% of P, 4.5%-8.5% of Ni, 5%-11% of Co, 0.1%-0.3% of Mo, 0.1%-0.3% of Cr, 0.05%-0.08% of Ti and the balance Fe and inevitable impurities. The welding method comprises the steps of designing a groove, machining the groove, and confirming an assembly gap of a welding joint based on the thickness of a steel plate; in the welding process, high-pressure gas cools the surface of a weld joint on line; after one welding seam is completed and the temperature of the welding seam is monitored to reach a preset value, laser remelting treatment is started; and after the welding seam is subjected to laser remelting treatment and the temperature of the welding seam is monitored to reach a preset value, next welding work is carried out, and after one welding seam is welded, welding continues according to the process till the whole welding work is finished.

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 provides an automatic welding device for a square lithium battery module. The automatic welding device comprises a feeding device, an automatic clamp, a rotary workbench and a welding robot. The battery module comprises a square battery cell, an insulating plate, an end plate and a side plate, and the welding position is the contact part of the side plate and the end plate. The automatic material taking device reciprocates among the part material taking position, the part fixing position, the welding station and the material taking station through the two linear motion modules perpendicular to each other, and the side plates are sucked and clamped through the vacuum suction cups and the fixing plates. The automatic clamp device fixes a battery module through a telescopic air cylinder with a guide rail and a clamp plate, and fixes a side plate through a vacuum chuck and a linear motion module so as to facilitate welding. The welding robot is composed of a mechanical arm and a welding gun and is used for welding parts. The rotary workbench is driven by a motor, the positions of two stations on the workbench can be switched when the rotary workbench rotates by 180 degrees each time, and continuous, efficient and circulating automatic welding operation can be conducted.

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 welding structure comprises a first pipeline and a second pipeline which are arranged in a butt joint mode, a V-shaped groove is formed in the butt joint position of the pipe wall of the first pipeline and the pipe wall of the second pipeline, an opening of the V-shaped groove faces the interior of the pipeline, and a ceramic gasket is arranged outside the V-shaped groove. The bottom layer, the filling layer and the covering layer are sequentially welded in the V-shaped groove in an FCAW-G welding mode; according to the welding structure of the large-diameter pipeline, the FCAW-G welding technology is applied to welding of the large-diameter pipeline, and the quality requirements of relevant welding preparation specifications are completely met. The CO2 single-side welding of the ceramic lining greatly improves the welding efficiency and obtains a good economic effect in practical application.

The invention discloses an arcing welding method for a butt welding seam of engineering machinery, which comprises the following steps: S1, butting the end parts of two butt welding plates to form a welding seam gap, and fixing support blocks below the two ends of the welding seam gap, so that arc-shaped grooves in the support blocks are aligned with the position of the welding seam gap; s2, a run-on plate is placed on the supporting block, the inner end of the run-on plate abuts against the welding gap of the two butt welding plates, and meanwhile an arc-shaped notch in the inner end of the run-on plate is aligned with the position of the welding gap; and S3, the run-on plate is fixed to the supporting block. The supporting block and the run-on plate are matched to form a welding pool at a welding seam of the plate needing to be welded, so that during welding, the quality defect of a welding seam end caused by insufficient fusion of a welding seam gap due to welding molten iron loss in a conventional welding method is avoided, and the quality reliability of the welding quality of the welded plate is ensured.

The present invention relates to a primary-side integrated circuit module of a power supply, comprising a control unit, a rectifier unit, and a first switch element arranged in a package body; two power input terminals, a positive power output terminal, and a negative power output terminal of the rectifier unit are respectively electrically connected to two AC power pins and a DC power pin and a ground pin on the package body; a first end and a second end of the first switch element are respectively connected to the switch element pins of the package body, a first control output terminal of the control unit is electrically connected to the control terminal of the first switch element, and a current detection input terminal of the control unit is connected to one of the switch element pins on the package body. The primary-side main transistors and circuits of the power supply are integrated through packaging technology, thereby reducing the number of components of the overall circuit, simplifying the design, and improving the reliability of the overall circuit.

The invention provides a zinc alloy product manufacturing process and a zinc alloy product, and relates to the technical field of zinc alloy pipe manufacturing processes. Comprising the following steps that S1, a zinc alloy plate strip is placed on a forming mold to be formed into a zinc alloy part in a corresponding shape in a cold machining plastic forming mode; and S2, a seam formed by the zinc alloy part is welded. According to the scheme, one-time forming of the zinc alloy product can be achieved, and the production cost is 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 invention relates to an aluminum alloy precise solid-state welding method based on a vacuum hot pressing sintering process. According to the method, Al powder, Mg powder, Si powder, Ti powder and Cu powder are mixed according to a certain proportion, then the mixed powder is subjected to cold press forming in advance, the influence caused by an oxidation film on the surface of the aluminum alloy is eliminated by means of elements such as Mg and Si in a vacuum environment, complex pretreatment does not need to be conducted on the aluminum alloy, and then solid-state precise welding of the aluminum alloy material is achieved. The method is easy and convenient to operate, and the requirement for aluminum alloy pre-welding pretreatment is low; in the welding process, base metal and mixed powder are both in a solid state, the welding temperature is low, the size precision is high, deformation is small, and the defect rate is low.

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 invention discloses a digital management method for welding quality. The method comprises the following steps: 1) electrifying equipment; 2) installing acquisition equipment; 3) connecting a collector; 4) software operation; 5) remote controller operation; 6) process monitoring; and (7) welding is finished. Welding data acquisition and comparison and real-time reporting of abnormal conditions are achieved, real-time analysis and feedback of data such as voltage and current, wire feeding speed and gas flow during welding are achieved, meanwhile, real-time warning of abnormal operation is achieved, the welding quality is optimized, and the welding risk 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 provides a secondary battery and electric equipment, a pole piece assembly in the secondary battery comprises a first pole piece, a second pole piece and a diaphragm, at least one of the first pole piece and the second pole piece comprises a composite current collector, a first conductive layer, an active material layer and an electric conductor, the composite current collector is provided with a tab part and a bearing part which are connected with each other, the active material layer is stacked on the bearing part, the first conductive layer and the active material layer are arranged on the tab part at the same side, the first conductive layer is locally connected with the active material layer, a through hole penetrating through the tab part is formed in the end part, far away from the bearing part, of the tab part, and the through hole is filled with a conductor connected with the first conductive layer. According to the pole piece structure, the electron transmission path between the composite current collector and the active material layer is widened, conductive connection between the pole pieces in the pole piece assembly is achieved through the electric conductor, meanwhile, battery pole lug welding adopting the composite current collector is compatible with an existing process, and the welding difficulty between the pole pieces based on the composite current collector is reduced.

The present invention discloses a tunnel steel arch frame I-beam plate welding device and method, the device comprises: a conveying mechanism; a first displacement clamping mechanism; a second displacement clamping mechanism; a third displacement clamping mechanism; a connecting plate welding mechanism, comprising a connecting plate plate welding robot, a first connecting plate welding robot and a second connecting plate welding robot; a reinforcing plate welding mechanism, comprising a reinforcing plate plate welding robot and a reinforcing plate welding robot. The present invention combines the two processes of welding connecting plates at both ends of the I-beam and welding reinforcing plates at the joints of the I-beam into one, which can weld connecting plates at both ends of the I-beam and reinforcing plates at the joints of the I-beam, greatly improving production efficiency and reducing production costs, realizing centralized and automated production operations of I-beam plate welding, realizing mass production of steel arch frames, and having accurate mounting positions and good welding effects, thereby ensuring the final product quality of the steel arch frames and meeting production and construction requirements.

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 present invention discloses a method for manufacturing a low-cost hard contact material for vacuum switches, and relates to the technical field of design and preparation of electrical contact materials. The method comprises the following steps: Step 1: Mixing materials in a V-shaped heating mixer, wherein the mixed materials are mainly tungsten powder, tungsten carbide powder, and a trace amount of copper powder and iron powder, etc. The mixing time is several hours, and the mixed raw material powder is subjected to multiple cycles of heat treatment, pressing and crushing. Step 2: Pre-burning treatment. Step 3: Melt infiltration process. Step 4: After the product is out of the furnace, the surface of the product is roughly processed, and the ferroalloy side is machined to a shape and size that meets the performance requirements, and the product can be shipped out of the factory. The present invention adopts an integrated process of melt infiltration and welding to produce low-cost contact materials for vacuum switches, which reduces the production cost of the product and the welding cost of downstream enterprises, and has important social benefits for achieving energy conservation, environmental protection, and a low-carbon economy.

The invention discloses an automatic round tube welding machine, which belongs to the field of profile processing, and more specifically, relates to an automatic round tube welding machine, comprising a machine body provided with a working surface, a roller for driving the round tube to rotate, a roller for pressing the round tube, a clamping device for clamping an end welding piece and driving the end welding piece to rotate synchronously with the round tube, and a welding head for welding; the round tube is in linear contact with the roller and two rollers respectively. In the invention, the roller is used as a clamping device to clamp the round tube, thereby increasing the acting force between the round tube and the roller, and then increasing the friction between the two, so that the round tube is not prone to slipping, and the roller can rotate synchronously with the round tube, thereby reducing the hindering force of the clamping device on the round tube.

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.