100results about How to "Improve welding effect" patented technology

The invention relates to the technical field of new energy, and discloses a battery and a battery pack, the battery comprises: a shell, the shell contains a Ti element, and the mass of the Ti element accounts for more than or equal to 60% of the total mass of the shell; the pole column is arranged on the shell; the battery cell comprises a battery cell body and tabs, the tabs comprise a positive tab and a negative tab, one of the positive tab and the negative tab is electrically connected with the pole, and the other one of the positive tab and the negative tab is electrically connected with the shell; the ratio of the mass of the Ti element of the shell to the total mass of the shell is a, the conductivity of the shell is b, and the lead-out size of the tab from the cell body is c; a. C / b is greater than or equal to 99 and less than or equal to 3650. According to the battery provided by the invention, the relationship among a, b and c is comprehensively controlled, so that the light weight of the shell is realized, the over-current capability of the battery can be met, the battery is prevented from generating relatively large temperature rise, and the condition that the safety performance of the battery is poor is prevented.

The application belongs to the technical field of copper-based diamond composite materials, and particularly relates to a diamond copper-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing modified diamond powder and copper powder by ball milling, and obtaining a diamond copper core material after hot-pressing sintering; activating the diamond copper core material, then magnetron sputtering a Ni / Pr alloy target material onto the upper and lower surfaces of the activated diamond copper core material to form a Ni / Pr composite intermediate layer; vacuum welding copper sheets on the upper and lower surfaces of the Ni / Pr composite intermediate layer to obtain the diamond copper-based composite material. The diamond copper-based composite material prepared by the application has high density, excellent thermal conductivity, low thermal expansion coefficient and is convenient to process.

This invention discloses a variable-wave arc welding power supply control method, arc welding equipment, control device, and storage medium. Applied to an arc welding equipment, the equipment includes a coordination control module and at least two power conversion modules. The coordination control module is connected to the controlled terminals of each power conversion module to control the switching of the power conversion modules to form and output pulse power. The output terminals of each power conversion module are connected in parallel to superimpose the electrical energy of the arc welding power supply. The variable-wave arc welding power supply control method includes: the coordination control module outputting its corresponding control commands to each power conversion module; and each power conversion module adjusting the pulse width and on / off timing of the pulse power according to the control commands to increase the power or voltage amplitude of the arc welding power supply. This design optimizes the output waveform of the welding power supply, enabling it to provide excellent dynamic characteristics and improve welding performance.

This utility model discloses a shielding membrane installation structure for cryogenic cargo holds, comprising a cover plate and multiple sets of shielding membrane assemblies. Each set of shielding membrane assemblies includes four shielding membranes arranged in a rectangular array, and multiple metal plates. Grooves are machined on the cover plate, and metal plates are fixed within the grooves. The four shielding membranes in each set are arranged in a rectangular array centered on the center point of the metal plate, and the adjacent sides of the four shielding membranes overlap each other sequentially. The corners of the shielding membranes are chamfered. The edges of the overlapping areas of the shielding membranes and the metal plates are welded to the metal plates, and the edges of the overlapping edges of the shielding membranes are welded to the membrane bodies of adjacent shielding membranes. The shielding membrane installation structure for cryogenic cargo holds disclosed in this utility model has advantages such as good sealing performance and high connection strength between the shielding membranes, thereby improving the airtightness and service life of the cargo hold.

The invention relates to the technical field of secondary battery cover plates, in particular to a secondary battery cover plate and a production process thereof, and the secondary battery cover plate comprises a light aluminum plate which is provided with a through hole along the thickness direction; the pole body is positioned in the through hole, and the outer wall is in insulated connection with the light aluminum plate; according to the secondary battery cover plate and the production process thereof, the pole body, the upper plastic, the sealing ring, the light aluminum plate, the lower plastic cover plate and the metal fixing piece are sequentially stacked and are assembled in a single welding manner, so that the operation is simple and time-saving, the product is firm and reliable, the production cost is reduced, and the subsequent automatic assembly work is facilitated; the pole body and the metal fixing piece are made of the same material, so that the integration is better during welding, and the process difficulty of welding is reduced; the metal fixing piece is arranged at the lower mounting part and the lower plastic cover plate in an embedded manner, so that the welding effect is improved, the metal fixing piece and the lower surface of the pole body are subjected to fusion welding, and welding slag cannot fall into the electrode to cause short circuit in the use process of the electrode.

The utility model provides a cylindrical battery shell bottom welding mark structure and a cylindrical secondary battery. The cylindrical battery shell bottom welding mark structure comprises a shell bottom and a welding mark positioned on the shell bottom, the welding track of the shell bottom and the negative collector plate is the welding mark; the welding mark is in a vortex line shape, the center point of the welding mark is a point O, the vertex angle, away from the point O, of the outer end of the welding mark is a point A, the vertex angle, close to the point O, of the inner end of the welding mark is a point B, the area of a circle which takes the point O as the circle center and passes through the point A is S11, the area of a circle which takes the point O as the circle center and passes through the point B is S12, the area of a radiation surface of the welding mark is S10, the area of the shell bottom is S0, and S10 = S11-S12. And S10 is not less than 1.5% S0 and not more than 8.5% S0. According to the utility model, the welding print is arranged to be in the vortex line shape, so that the length of the welding print can be guaranteed, the area of the radiation surface of the welding print can be reduced, and the welding effect can be effectively improved, the safety performance of the battery can be guaranteed and the processing cost of the battery can be reduced by limiting the area of the radiation surface of the welding print.

This application provides a rigid and stable welding fixture for bolster plates, relating to the fields of rail transit and machinery manufacturing. It includes a base and a pair of upright plates mounted on the base. The left upright plate has an opening, and the right upright plate has a receiving groove, the receiving groove being opposite to the opening. A support plate and an auxiliary plate are positioned between the pair of upright plates. A cover plate is located on top of the support plate, and the bolster plate is located at the bottom of the auxiliary plate. One side of the support plate passes through the opening, and the other side of the support plate is located in the receiving groove. A cable is located at the bottom of the support plate, one end of which is connected to the bottom of one side of the support plate, and the other end of which extends along the length of the support plate and passes through the receiving groove. The other end of the cable is wound around a roller. This application has the characteristic of being able to counteract the welding stress generated during welding, thereby improving the welding effect of the bolster plate on the cover plate and preventing product deformation.

This utility model discloses a welding device for stainless steel-lined plastic-coated composite steel pipes, including a welding table, a lifting frame, a lifting assembly, a moving cylinder, an argon arc welding assembly, an electric arc welding assembly, positioning cones, and a positioning assembly. The lifting frame is movably positioned above the welding table, and the lifting assembly is positioned between the lifting frame and the welding table. Two moving cylinders are connected in the same direction within the lifting frame via the moving assembly. The argon arc welding assembly is installed below one of the moving cylinders, and the electric arc welding assembly is positioned below the other moving cylinder. Multiple positioning cones are movably positioned above the welding table, and the positioning assembly is positioned between the multiple positioning cones. The lifting assembly includes a support frame, a first electric cylinder, and a lifting plate. The support frame is fixedly connected to one side of the welding table. This welding device for stainless steel-lined plastic-coated composite steel pipes reduces welding steps and improves welding efficiency.

The utility model relates to the technical field of inductor terminals, in particular to a copper-clad aluminum structure for an inductor connecting terminal. The connector comprises a connecting terminal and a copper-clad aluminum structure processed at the tail end of the connecting terminal, wherein the copper-clad aluminum structure is provided with a wrapping layer and a solid layer from outside to inside in sequence; the joint of the wrapping layer and the insulating paint layer protrudes outwards to form a protruding step. According to the utility model, the part, which is not coated with the insulating paint, of the tail end of the solid layer is inserted into the copper sleeve, and the wrapping layer extrudes part of the insulating paint layer to form the extrusion layer obliquely wrapping the solid layer, so that the wrapping is tight, and the erosion of the external environment is effectively isolated; the wrapping layer is in close contact with the solid layer, so that the conductivity is good; and a copper surface capable of being directly welded is provided, so that the weldability of the terminal is improved.

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 utility model discloses a silencer shell detection tool, and particularly relates to the technical field of silencer shell detection tools, which comprises a detection tool piece arranged at the top of a bottom plate and used for fixing a silencer shell. The supporting mechanism is distributed in a mirror image mode and used for supporting the silencer shell, the two sets of detection tool hole mechanisms are used for positioning the silencer shell, the first transverse positioning mechanism and the second transverse positioning mechanism are used for transversely positioning the silencer shell, and the two sets of detection block mechanisms are arranged outside the two ends of the silencer shell respectively. According to the utility model, the hole site on the silencer shell is clamped through the detection tool hole mechanism, the two ends of the silencer shell are aligned and leveled through the first transverse positioning mechanism and the second transverse positioning mechanism, and then the two ends of the silencer shell are pressed and fixed through the detection block mechanism, so that through multi-direction positioning, the detection efficiency is improved; and the assembly accuracy of the silencer shell can be ensured, so that the accuracy and stability of subsequent welding of the silencer shell are improved.

The invention provides a supporting structure for bonding equipment and the bonding equipment. The supporting structure comprises a supporting surface, and the supporting surface is used for supporting a to-be-bonded structure; an air channel is formed in the supporting structure, and the supporting structure is further provided with a plurality of channels which are located on the side, facing the supporting face of the supporting structure, of the air channel and distributed in a scattered mode; each channel is communicated with the air channel and extends to the supporting surface; the supporting structure is further provided with an air exhaust hole communicated with the air channel. The bonding equipment comprises the supporting structure, a crimping structure, a first base, a second base and a driving part, the supporting structure is mounted on the first base, and the crimping structure is mounted on the second base; and the driving part is used for driving the first base and / or the second base to move, so that the crimping structure abuts against the top of the to-be-bonded structure.

The invention relates to the technical field of battery sealing nail welding, and provides a battery sealing nail welding defect repairing method. The repairing method comprises the following steps: acquiring an aluminum wafer of which the diameter is greater than that of a liquid injection hole of the battery top cover; removing the sealing nail at the liquid injection hole of the top cover of the battery; cleaning a liquid injection hole area; carrying out penetration type stitch welding by taking the wafer as an upper layer and the battery top cover as a lower layer to form a welding seam for melting the wafer and the battery top cover into a whole; and treating the welding seam and the wafer, enabling the outer surface of the wafer to be flush with the outer surface of the battery top cover, and enabling the liquid injection hole area not to be visually recognized. According to the repairing method, the aluminum wafer and the battery top cover are subjected to penetration stitch welding, and the welding seam and the surface of the wafer are treated, so that the welding defect of the sealing nail is repaired, the situation that the battery is degraded and scrapped due to poor welding or appearance defect of the sealing nail is avoided, and the quality requirement of the battery is met.

The invention discloses a hot rolling production method of low-cost pure hydrogen delivery pipeline steel L360MH, which adopts a low-carbon equivalent design to remarkably improve weldability and hydrogen embrittlement resistance. Ti / Nb composite microalloying refined grains are added, so that a high-density nanoscale carbonitride precipitated phase is formed and effectively serves as a'hydrogen trap ', and hydrogen diffusion is inhibited; meanwhile, the content of P (smaller than or equal to 0.013%) and the content of S (smaller than or equal to 0.0015%) are strictly controlled, impurity segregation is reduced, and hydrogen induced cracking (HIC) sensitivity is reduced; through a controlled rolling and controlled cooling (TMCP) process, fine and uniform ferrite and a small amount of pearlite structures (the grain size of the ferrite is greater than or equal to 9 grades) are obtained; a high-proportion small-angle grain boundary and a uniform precipitated phase hinder crack propagation, so that the steel is endowed with excellent low-temperature toughness (the impact energy at-10 DEG C is more than or equal to 200J) and high hydrogen embrittlement resistance; and the structure uniformity also guarantees the strength stability (the yield strength is greater than or equal to 390MPa), and the mechanical requirements of pure hydrogen transportation are met.

The application belongs to the technical field of laser processing, and more particularly relates to a laser head, a laser device and a laser processing equipment. The laser head provided by the embodiment of the application comprises a laser head body, the laser head body is provided with an entrance light channel for laser entering and an exit light channel for laser exiting, an inner cavity for mixing gas is arranged between the entrance light channel and the exit light channel, an air inlet for communicating with the inner cavity is arranged on the laser head body, and an air channel for communicating the inner cavity and the exit light channel is further arranged in the laser head body. The laser device provided by the embodiment of the application comprises the above laser head. The laser processing equipment provided by the embodiment of the application comprises the above laser device. The embodiment of the application reduces the space occupied by the external device and improves the space utilization of the production site.

This invention provides a method, production process, and resulting steel for controlling cracks in AH36 ship plate steel billets. The steps include: adding molten iron and a first scrap steel to a converter for smelting, with the final temperature of the converter smelting reaching 1590-1610℃, to obtain molten steel; sending the molten steel to an LF furnace for refining, adding a second scrap steel during the refining process, the amount of the second scrap steel being 10-15% of the weight of the molten steel, to obtain refined molten steel; sending the refined molten steel to a continuous casting machine for casting, with a casting speed of 1.3-1.5 m / min, to obtain a billet; after heating in a heating furnace, the billet is sequentially rough-rolled and finish-rolled, followed by cooling, straightening, and finishing treatment to obtain the AH36 ship plate steel. The control method of this invention is simple and easy to operate. By effectively controlling the content of each element, the generation of cracks is reduced, thereby improving production efficiency and reducing production costs.

The utility model discloses an automatic welding frame for an upper cover of a wind driven generator blade transportation tool, which belongs to the field of welding frames and comprises a supporting plate, a lifting structure is mounted on the supporting plate, and a rotating structure is mounted on the lifting structure. The rotating structure comprises two groups of bearing seats and a rotating shaft rotationally mounted on the bearing seats, and a fixed disc is mounted at one end, far away from the bearing seats, of the rotating shaft; through the arrangement of the rotating structure, a bearing seat, a rotating shaft, a first clamping plate, a worm gear, a worm and the like are used in cooperation, the functions of rotating a welded workpiece by 0-360 degrees and fixing the welded workpiece are achieved, the requirements for different welding angles of the welded workpiece are met, and the situation that shifting rods in an existing fixing frame for automatic welding are placed in fixing grooves in the two sides to be fixed is avoided; therefore, the problem that the overturning frame can only rotate by 180 degrees with the workpiece and cannot drive the workpiece to be adjusted to other required welding angles is solved, and the welding effect and the welding efficiency of the workpiece are improved.

An in-die laser welding structure comprises an upper die base, a lower die base, a discharging plate and a material belt, the upper die base and the discharging plate are fixedly connected through a connecting plate, a fixing plate is arranged at the upper end of the lower die base, a laser welding head is obliquely arranged in the fixing plate, the material belt is fixedly arranged at the upper end of the fixing plate, the upper die base comprises a male die, and a female die is fixedly arranged in the fixing plate. The upper die base drives the male die to punch a material belt, a product is punched from the material belt into the female die, a welding groove is formed in the product, the laser welding head is aligned with the welding groove to weld the product, the laser welding head is arranged in the lower die base, laser welding is directly completed before discharging after the lower die base completes punching, and high precision and consistency of the welded product are guaranteed. A laser welding head is obliquely arranged in the fixing plate, so that the welding space is sufficient, and heat accumulation can be prevented from affecting the welding effect; and the original clamping station and the original welding station are omitted, so that the production cost is greatly reduced.

The present disclosure relates to a circuit board assembly, a circuit board structure and an electronic device. The circuit board assembly comprises a frame, a first board body located in the frame, and a first connecting rib connected between the frame and the first board body, wherein a pressing point is arranged on the first connecting rib, and the pressing point is used for flattening the first board body. The welding effect of the first board body can be improved by the embodiment of the present disclosure.

The utility model relates to the technical field of rocket storage tanks, in particular to a tool for handheld resistance welding of a stringer and a stiffening plate of a rocket storage tank. The tool comprises a supporting mechanism and a mounting mechanism, the supporting mechanism comprises a second supporting beam, and a first supporting beam is mounted on the second supporting beam; a fifth supporting beam is mounted at the top end of the second supporting beam, and the mounting mechanism is mounted on the fifth supporting beam and used for mounting handheld welding tongs. A sixth supporting beam is installed at the top end of the fifth supporting beam, a stringer is placed on the sixth supporting beam, and a reinforcing plate is placed at the position, needing to be reinforced, of the stringer; when the handheld electrode holder is installed on the installation mechanism, an electrode of the handheld electrode holder corresponds to the position, needing to be reinforced, of the stringer so as to be used for welding the stringer and the reinforcing plate. According to the utility model, the labor cost for welding the stringer and the stiffening plate can be reduced, the welding efficiency is improved, the condition of welding deviation can be avoided, and a good welding effect between the stringer and the stiffening plate is ensured.

This invention relates to the field of high-level storage tank welding technology, specifically to a welding process and tank for the inner cylinder of a high-level liquid storage tank. The process includes an insertion welding device comprising a main sleeve, a fork-shaped component one, a fork-shaped component two, and a welding torch. One end of the main sleeve is rotatably fitted with a ring sleeve. A sleeve is fixed to the outer wall of the main sleeve, and a rotating module is installed between the sleeve and the ring sleeve. The rotating module drives the ring sleeve to rotate. The fork-shaped component one includes a main cross rod one and a main cross rod two, which are rotatably connected to the ring sleeve. The main cross rods one and two are arranged in a cross configuration. A tensioning module is installed on the ring sleeve. In this invention, the insertion welding device allows welding to be performed inside the cylinder through a window on the side wall of the tank, thereby welding the inner side of the last circumferential seam. This ensures that the inner and outer sides of all circumferential seams on the main body of the tank are welded, thus improving the welding effect and increasing the pressure-bearing length of the tank.

The application discloses a shell welding device for water pump production and belongs to the water pump welding field. The shell welding device for water pump production comprises a fixing base, the top of the fixing base is respectively assembled with a placing table capable of moving in the vertical direction and a rotating table capable of rotating, the side surface of the rotating table is assembled with an electric push rod, the side surface of the output shaft of the electric push rod is assembled with a horizontal plate, and the side surface of the horizontal plate is connected with a partition bin through the arrangement of an elastic telescopic rod. The shell welding device for water pump production stacks the water pump shells to be welded on the bottom placing table, after the water pump shells are preliminarily supported, the electric push rod is started, the horizontal plate, the elastic telescopic rod one, the partition bin, the torsional spring block one, the pre-pressing rod one, the torsional spring block two, the pre-pressing rod two, the reinforcing ribs and the welding gun body are cooperated, so that the two sections of water pump shells at the top and the bottom are preliminarily aligned first, then are centrally aligned, and stable support is provided for the water pump shells, and the welding effect of the device is improved.

This application relates to the technical field of welding tools for irregularly shaped exhaust pipes, and more particularly to a welding positioning fixture for irregularly shaped exhaust pipes, comprising: a welding platform with mounting holes; a clamp installed at the mounting holes; and a fixing component fixed to the welding platform by the clamp. The fixing component is configured to adapt to the shape of the irregularly shaped exhaust pipe to fix its segments. Before welding, the fixing component is first fixed to the welding platform by the clamp, and then the corresponding segments of the irregularly shaped exhaust pipe are fixed to the fixing component. At this point, the segments are spliced ​​to form the shape of the irregularly shaped exhaust pipe. The positions where adjacent segments need to be welded are then welded to obtain the irregularly shaped exhaust pipe. The method of fixing the segments of the irregularly shaped exhaust pipe by using the clamp and fixing component together replaces the method of pre-fixing the segments of the irregularly shaped exhaust pipe using an incompatible clamp in the prior art, resulting in better stability of the segments of the irregularly shaped exhaust pipe and thus improving welding efficiency and welding effect.

The utility model belongs to the field of welding equipment and provides a gantry type friction stir welding equipment with a back-pulling function, which comprises a gantry mechanical body, a machine head assembly, a numerical control system, an electric control cabinet, a lubricating system, a protective piano cover and an appearance sheet metal, etc. The machine head assembly has a unique stirring needle back-pulling design and a process inclination angle adjustment design. The stirring needle back-pulling design can ensure that the stirring needle maintains a certain rotating speed and gradually retracts to fill the tail hole when the welding is completed, and finally realizes welding without a keyhole. The process inclination angle adjustment design can ensure that the machine head assembly is manually adjusted within a certain range (±5°) of angle, and meets the requirements of the friction stir welding process.

This invention discloses a quenched and tempered high-strength steel Q1500 and its production method, belonging to the field of steel rolling technology. The quenched and tempered high-strength steel Q1500, by weight percentage, comprises the following chemical composition: C: 0.27%, Si: 0.31%, Mn: 0.99%, Alt: 0.043%, Cr: 0.45%, Nb: 0.026%, V: 0.045%, Ti: 0.015%, Mo: 0.48%, Ni: 1.02%, with the balance being Fe and unavoidable impurities, Ceq = 0.7%. The finished high-strength steel Q1500, produced through smelting, continuous casting, heating, rolling, and quenching and tempering heat treatment, has a yield strength ≥1500 MPa, tensile strength ≥1550 MPa, elongation ≥8%, and a thickness of 10-25 mm. The quenching and tempering heat treatment process is less complex and simplifies the process steps, effectively improving production efficiency.

The application discloses a kind of welding devices of inspection well, it includes: support frame;Limiting component, is located support frame, it includes: limiting block, it is slidably arranged on support frame, and opening is opened on limiting block;Multiple rollers are rotatably connected with limiting block, and roller is set at opening, wherein the axis of roller and the axis of inspection well are parallelly arranged;And drive mechanism is connected with support frame, it is used to drive inspection well to rotate along its axis;Welding assembly is located at the side of support frame.Wherein, coaxially arranged with conversion joint in inspection well, and inspection well and conversion joint are synchronous rotation, and welding assembly is used to fix conversion joint and inspection well.The present application can effectively improve the low welding efficiency of existing inspection well, while large-diameter inspection well branch size is also larger, in manual welding process, rotation amplitude is large, cause welding difficulty, in turn affect the problem of welding quality.

The invention discloses a laser welding device for a large heat preservation box, and relates to the technical field of heat preservation box laser welding, the laser welding device comprises a base and a welding head, the welding head is arranged above the base, each side of the surface of the base is slidably provided with a push plate, a first spring is arranged between each push plate and the base, and the push plates are reset through the elastic force of the first springs; an adjusting frame is slidably mounted on the surface of the base, a sliding rail is slidably mounted on the inner side of the adjusting frame, the position of the sliding rail on the surface of the adjusting frame is adjustable, a sliding rod is slidably mounted on the surface of the sliding rail, the sliding rod is connected with a welding head, the welding head is driven to slide on the surface of the sliding rail by moving the sliding rod, a shell is evenly and neatly welded, and the flatness of a welded junction is guaranteed. And when the corner is welded, the angle of the welding head is easier to control, and the problems of excessive welding and welding omission are avoided.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

The utility model discloses a pipeline argon filling welding protection device which comprises two protection units. The protection unit comprises a ventilation pipe, a guide ring arranged at one end of the ventilation pipe and a positioning frame arranged at the other end of the ventilation pipe. An elastic sealing ring is arranged on the periphery of the guide ring; an annular groove is formed in the outer wall of the guide ring; the elastic sealing ring is connected in the annular groove in a sliding manner; the guide ring is provided with a first joint; three adjusting screws are arranged on the periphery of the positioning frame; and the adjusting screw is in threaded connection with the positioning frame. An argon protection cavity is formed in the position between the two welding pipes, operation is easy and convenient, and the welding quality and efficiency can be improved; the protection device is firmly fixed on the pipe wall by adjusting the screw, so that the protection device is prevented from loosening and displacing; and meanwhile, the guide ring provides guiding and supporting effects for the elastic sealing ring, the sealing effect between the elastic sealing ring and the pipe wall is improved, and the service life of the elastic sealing ring is prolonged.

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