548results about How to "Improve welding effect" patented technology

The invention discloses an inner clamping type steel pipe welding clamp, and belongs to the technical field of steel pipe welding. Comprising a bottom plate, clamping wheels and other components, the rotating directions of threads at the two ends of a double-end threaded rod are opposite, the double-end threaded rod and a polished rod are installed on the bottom plate side by side, an output shaft of a first motor is connected with a first bevel gear, a second bevel gear matched with the first bevel gear is fixedly installed in the middle of the double-end threaded rod, and two clamping mechanisms are oppositely installed on a threaded sleeve. The two movable plates are symmetrically and slidably installed in the sliding grooves in the two ends of the bottom plate, and a containing table is fixed to the upper ends of the movable plates. According to the clamping mechanism, the multiple contact parts are used for conducting multi-point positioning on the interiors of the steel pipes at the same time, meanwhile, the height of the clamping mechanism can be adjusted, the steel pipes are directly stabilized in the air through the clamping mechanism, the two steel pipes needing to be welded can be adjusted to be concentric and free of deviation, and the steel pipes cannot be shielded; and welding, grinding, polishing and other work are facilitated, and the precision of butt joint and post-treatment is improved.

The invention discloses a welding gun pose online planning method for multi-layer and multi-channel external welding of a pipeline and related equipment. The method belongs to the technical field of intelligent welding and comprises the steps that a laser line image and welding gun posture data of a pipeline welding groove are obtained; extracting feature pixel points from the laser line image; converting the three-dimensional point cloud into a three-dimensional point cloud through a detection mathematical model, fitting to obtain a three-dimensional welding groove graph, and calculating a welding groove size parameter, a welding gun pose parameter and a to-be-welded workpiece pose parameter by utilizing the three-dimensional welding groove graph and the welding gun pose data, so as to determine a welding gun pose planning value; filling welding of the current pass is conducted along the welding groove according to the welding gun pose planning value, meanwhile, the welding gun pose real-time value is detected in real time, and the welding gun pose real-time value is corrected; in the return stroke, welding gun pose parameters are re-planned; and after multi-pass filling welding is completed, a welding gun is controlled to conduct cosmetic welding on the welding groove, and pipeline outside welding is completed. Therefore, the method can obtain a better welding effect.

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 relates to the field of welding, in particular to steel structure welding equipment with an automatic positioning function, which comprises a fixed ring I, an electric control guide rail, a cylinder, an electric push rod I, a sliding ring, a fixed ring II and the like, the first fixing ring is fixedly connected with an electric control guide rail. The electric control guide rail is rotationally connected with a cylinder through a sliding block. The cylinder is fixedly connected with a plurality of electric push rods I; telescopic parts of all the electric push rods are jointly and fixedly connected with a sliding ring; the sliding ring is rotationally connected with a second fixing ring. The two steel pipes in butt joint are fixed through the electric driving wheels on the first fixing ring and the second fixing ring, the first fixing ring, the cylinder and the second fixing ring are concentrically arranged, all the electric driving wheels jointly center and clamp the two steel pipes, and then the laser welding head is controlled to rotate for welding. During welding, deviation between the steel pipes can be effectively avoided, and the welding quality of butt joint of the steel pipes is improved.

The invention relates to the technical field of welding equipment, in particular to a ship piping accessory automatic welding device which comprises a base and a supporting plate fixedly connected to the base and further comprises a hollow cylinder rotationally arranged on the supporting plate, and four supporting rods surround the hollow cylinder; the pushing assembly is arranged on the hollow cylinder, connected with the four supporting rods and used for driving the four supporting rods to expand outwards to support the supporting pipe; by starting the first driving motor, the multiple supporting rods can be driven to expand outwards to support the branch pipe, meanwhile, the C-shaped buckle plate is driven to deflect to fix the transverse pipe, then the branch pipe and the transverse pipe are conveniently and rapidly fixed at the same time, meanwhile, in the process of fixing the branch pipe and the transverse pipe, the alignment assembly is used for driving the branch pipe to move to be in butt joint with the transverse pipe, and it is guaranteed that the welding positions are aligned; meanwhile, after the transverse pipe is aligned with the branch pipe, the first driving motor continues to be started to drive the transverse pipe to move and break away from the branch pipe, so that a welding seam is formed, and the welding effect is improved.

The invention discloses hardware pipe welding equipment with high safety performance in the technical field of hardware pipe welding, which comprises a supporting unit comprising a base positioned at the bottom, two groups of supporting parts symmetrically arranged on two sides above the base, and threaded shafts correspondingly inserted in the center positions of the supporting parts in the vertical direction, the first driving motor is arranged on one side of the lower portion of the base, the workbench is arranged above the base in parallel, and the upper ends of the two sets of supporting components both penetrate through the workbench and extend upwards. A to-be-welded hardware pipe is stably clamped and fixed through the clamping unit, potential safety hazards existing in a hand holding mode are avoided, the safety performance of the device is improved, the clamping range can be correspondingly adjusted according to the use requirement, and the practicability is high. And the device can meet the working requirement for limiting and clamping hardware pipes of different sizes and specifications, the application range of the device is widened, and the use flexibility of the device is remarkably improved.

The invention discloses a size-adjustable electric control cabinet body machining device, and relates to the technical field of electric control cabinet body machining equipment.The size-adjustable electric control cabinet body machining device comprises a machining table and two synchronous wheels rotationally connected to the top of the machining table, a synchronous belt is installed on the outer walls of the two synchronous wheels, and two first moving blocks are fixedly connected to the outer wall of the synchronous belt; each set of first moving blocks comprises five first moving blocks, and a through groove penetrating to the bottom is formed in the top of the machining table. And a plurality of welding manipulators are arranged. Through cooperation of parts such as synchronous wheels, the electric control cabinet can be automatically turned over in the process of intermittently transferring to four welding parts, so that the welding continuity is improved, meanwhile, when the electric control cabinet is transferred to the position of the replacement part after welding is completed from the fourth welding part, the welded electric control cabinet can be detached and replaced with a new electric control cabinet, and the welding efficiency is improved. Therefore, the overall welding efficiency of the electric control cabinet is improved.

The invention discloses a high-performance road and bridge steel formwork structure machining welding device which comprises a base, a square box is fixed to the top of the base, a first through groove is formed in the bottom of the square box in a penetrating mode, a rotating plate is rotatably connected to the interior of the first through groove, and a plurality of annular steel plates are stacked on the top of the rotating plate. According to the welding device for machining the high-performance road and bridge steel formwork structure, through the arrangement of the automatic rapid alignment mechanism, rapid and automatic alignment of a plurality of stacked ring steel plates is achieved, after the ring steel plates are aligned, welding of joints is facilitated, manual alignment operation is not needed, the automation degree is high, alignment is accurate, and the alignment effect is good; meanwhile, the four T-shaped supporting plates and the vertical plates can be adaptively expanded and contracted, ring steel plates of different sizes can be tightly supported and aligned, use of the ring steel plates of different pipe diameters is met, and the application range of the device is widened.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The friction stir welding device based on battery shell manufacturing comprises a welding table, a positioning mechanism, a welding mechanism and a cooling mechanism, the welding table is provided with a material containing plane used for containing a plate, the positioning mechanism fixes the plate, the welding mechanism comprises a rotating part and a stirring part, the rotating part is controlled to move and drives the stirring part to conduct welding, and the cooling mechanism is used for cooling the stirring part. The cooling mechanism comprises a shell, a liquid source and a fan, a containing space is formed in the shell and connected with the liquid inlet, the air inlet and the air outlet, the opening covers the weld joint and is attached to the surface of the plate, a plurality of partition pieces are arranged in the containing space to form a first heat dissipation flow channel, and cooling liquid and airflow are guided to flow in order. According to the friction stir welding device, cooling liquid is supplied through the liquid source, airflow is provided through the fan, local cooling gradient control over the welding seam area and the periphery is achieved, the problems of stress concentration, cracks and strength reduction caused by the too large temperature gradient are solved, meanwhile, the joint hardness recovery effect is improved, and the welding quality is optimized.

The invention relates to the technical field of welding, in particular to a steel auxiliary welding device which comprises a base, electric sliding rails are fixedly arranged on the upper surface of the base, sliding blocks are slidably arranged in the electric sliding rails, a moving plate is fixedly arranged between every two adjacent sliding blocks, and stand columns are fixedly arranged on the upper surfaces of the moving plates. A stand column is fixedly arranged on the upper surface of the movable plate, a supporting cylinder is fixedly arranged at the top end of the stand column, a supporting frame is further fixedly arranged on the upper surface of the movable plate, a positioning cylinder is fixedly arranged at the end of the supporting frame, and the axis of the supporting cylinder and the axis of the positioning cylinder are kept consistent. The axis adjusting device is used for adjusting the axis of the to-be-welded steel pipe fitting to be consistent with the axis of the supporting cylinder; and a clamping mechanism. When the steel pipe fitting is in butt joint with the flange plate, the axis of the steel pipe fitting is just kept consistent with the axis of the flange plate, rapid and accurate butt joint of welding position points between the flange plate and the steel pipe fitting can be effectively achieved, and the using effect is better.

The invention belongs to the technical field of air blower heating wire installing and welding, and particularly relates to a high-speed negative ion air blower heating wire installing and welding device and a method thereof.The high-speed negative ion air blower heating wire installing and welding device comprises a workbench, a conveying belt is installed on the workbench, a fixing frame is installed on the conveying belt, an air cylinder is installed on the workbench, and a pressing plate is installed on the air cylinder; a welding manipulator is further mounted on the workbench; the fixing frame comprises a mounting seat and a lifting seat, the mounting seat is fixedly mounted on the conveying belt, the lifting seat is hinged to the mounting seat, a jacking sliding groove is formed in the lifting seat, a jacking block is mounted on the workbench, and the jacking block is matched with the jacking sliding groove. A placing groove is formed in the lifting seat, and the surface of the placing groove is smooth; the device is simple in structure, the heating wire is fully fixed and positioned, it is guaranteed that the position and angle of the heating wire are accurate during welding, therefore, welding of the heating wire is facilitated, and the welding speed and welding quality of the heating wire are improved.

The invention relates to the technical field of roller machining and surrounding type welding, and provides a device for welding a girth in a cylinder, which comprises a vertical guide frame, a longitudinal guide frame and a longitudinal guide frame, one side of the feeding support is of a slotting structure; the two sides of the connecting seat are respectively matched with the guide rails and are arranged in the slotting structures of the vertical guide frame and the feeding bracket in a sliding manner, and the vertical guide frame and the feeding bracket are arranged in a 90-degree staggered manner; a welding gun table is fixedly arranged at one end of the feeding support, a welding gun base is rotationally arranged outside the welding gun table, and a double-pipe welding gun is fixedly arranged outside the welding gun base. The auxiliary pressing wheel is arranged, the limiting effect is provided, the position of the barrel can be limited, it is guaranteed that the barrel can only rotate in situ, the conditions that the barrel falls off and the like can be avoided, the hexagonal shaft part of the transmission shaft can keep the transmission effect in the sliding process, and the movable T wheel can be driven at any position; the problem that existing equipment lacks a limiting effect is solved.

The invention relates to the technical field of welding, in particular to an automatic laser solder ball welding method and related equipment for a ball grid array packaging chip, and the method comprises the steps: obtaining a target coordinate of a nozzle corresponding to a nozzle welding position; judging whether the target coordinate meets a preset coordinate requirement or not; if the target coordinate meets the preset coordinate requirement, whether the nozzle welding height needs to be calculated or not is judged; if the welding height of the nozzle needs to be calculated, the welding height of the nozzle is obtained, and the nozzle is lowered to the welding height of the nozzle; based on the target coordinate, controlling the solder ball to fall into a nozzle, and controlling a laser to emit light for welding; judging whether the welding result meets a preset welding requirement or not; and if the welding result meets the preset welding requirement, the current welding process is ended. According to the invention, the welding effect can be improved.

The invention discloses welding equipment and method for a water cooling plate, and belongs to the field of water cooling plate welding. Welding equipment for a water cooling plate comprises a base and a housing, a first air cylinder is fixedly connected to the base, the housing is fixed to the top of the telescopic end of the first air cylinder, directional guide rods are fixedly connected to the two sides of the base, the housing is connected to the directional guide rods in a sleeving mode to slide, a second air cylinder is fixedly connected to the top of the housing, and the second air cylinder is fixedly connected to the top of the housing. The device further comprises a cleaning assembly and a welding assembly. Through the repulsion effect of a third magnetic plate and a piston plate and the cooperation of arrangement of a nitrogen molecule filtering membrane, nitrogen is continuously filled into a gas storage ring, and in the welding process, the repulsion effect of a second magnetic plate and a sealing plate is utilized, so that the nitrogen is discharged to a welding seam along a blowing pipe, a brazing fluid better permeates into the welding seam, and the welding quality is improved. And meanwhile, the gas flowing speed at the weld joint is increased, so that the brazing fluid is quickly condensed, and the welding efficiency and quality are effectively improved.

The invention relates to a preparation method of a photovoltaic welding strip, the photovoltaic welding strip, a photovoltaic module and a preparation method, and the preparation method comprises the following steps: S1, carrying out the oxide removal and annealing treatment of an oxygen-free copper wire at the same time, and obtaining an annealed copper strip after cooling; s2, in the protection environment of inert gas, the annealed copper strip is immersed in molten brazing filler metal alloy liquid for surface tin plating, and after cooling, a plated copper strip with an alloy plating layer is obtained; s3, oxide on the surface of the plated copper strip is removed; s4, immersing the plated copper strip subjected to oxide removal into a film forming substance, and drying to obtain a film forming welding strip; wherein the film forming substance does not contain carboxyl. According to the method, oxide removal and annealing treatment are carried out at the same time, the photovoltaic welding strip which is high in preparation efficiency and can be welded without participation of scaling powder can be achieved, the photovoltaic welding strip is combined with the preparation technology of a photovoltaic module, and a high-reliability module can be obtained.

The anti-deviation iron tower welding machine comprises a base and a welding table, the welding table is located in the middle of the top end of the base, a containing groove is formed in the welding table, and a bottom plate is arranged in the containing groove. In the using process, the motor is started to drive the connecting base and the cross-shaped linkage rotating frame to rotate, and the movable blocks on the top of the movable rod are in a movable connection state in the movable grooves, so that when the cross-shaped linkage rotating frame is located, the multiple sets of movable blocks drive the movable rod to pull inwards under the action of the movable grooves; in other words, the moving plate connected with the other end of the moving rod and the fixing base synchronously move inwards, so that multi-position linkage inward moving operation can be achieved, multiple sets of reinforcing plates arranged in the fixing base are attached to the outer wall of the bottom plate at the same time, labor force and time for sequentially supporting and aligning the reinforcing plates manually for welding are reduced, and the welding efficiency is improved. And the stability during contact is enhanced while the working efficiency is improved.

The invention relates to the technical field of automobile part machining, and discloses spot welding equipment for automobile part machining, the equipment is mainly composed of a spot welding machine and a spot welding auxiliary structure, the spot welding machine comprises a transformer, electrodes, a controller, a machine body and other conventional components, and the spot welding auxiliary structure is arranged between the upper electrode and the lower electrode of the spot welding machine and fixed to one side of the lower electrode; core components of the device comprise a lifting frame, a double-sided toothed plate, a spring rod, a push block, an auxiliary pressing rod, a reset rod, a sliding box, a ratchet gear, a reciprocating lead screw, a reciprocating sliding seat, an exhaust pipe, a click air pipe, a cleaning air pipe, a telescopic pipe, a cleaning box, an impeller, a cleaning piece and the like. Through the arrangement of the spot welding auxiliary structure, the spot welding quality and efficiency of the automobile parts are remarkably improved, the spot welding auxiliary structure plays an important role in promoting the part machining link of the automobile manufacturing industry, has remarkable advantages in the aspects of guaranteeing the product quality and improving the production benefits, and provides a reliable equipment solution for the automobile part welding process.

The invention relates to the technical field of welding materials, in particular to a high-efficiency deposited nickel-based welding wire capable of preventing welding cracks based on phase regulation and application of the high-efficiency deposited nickel-based welding wire, and the nickel-based welding wire comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.10-0.20% of Si, 2.9-3.2% of Mn, and 1t of P; 0.005%, S: lt; 0.003% of Cu, 19.7-20.5% of Cr, less than or equal to 0.04% of Co, and 1t of Cu; the Ni-based alloy comprises the following components in percentage by weight: 0.10% of Ni, 0.3-0.6% of Ti, 0.4-2.0% of Fe, 2.1-2.9% of Nb, less than or equal to 0.3% of Mo, less than or equal to 0.01% of N, less than or equal to 0.005% of O, less than or equal to 0.50% of other impurity elements and the balance of Ni. The specific value of Ti to Nb is controlled to be 0.10-0.22, the specific value of C to Nb + Ti is controlled to be 0.012 or below, appropriate morphology and distribution of (Nb, Ti) C type intergranular precipitates are obtained, precipitation of grain boundary M23C6 is reduced, and the creep resistance and high-temperature deplasticity crack resistance of the material are effectively optimized.

The invention relates to an all-position welding robot adaptive to different pipe diameters, which comprises a guide rail, a welding robot, a driving device, a driving device, a driving device, a driving device and a driving device, and is characterized in that the guide rail is annularly arranged on the periphery of a pipe fitting; the multiple supporting rod assemblies are arranged on the guide rail and distributed in the circumferential direction of the guide rail at intervals; the supporting rod assembly comprises clamping pieces capable of moving in the radial direction of the guide rail, and the multiple clamping pieces abut against the outer wall of the pipe fitting. The circumferential moving assembly can be movably arranged on the guide rail in the circumferential direction of the guide rail; the axial moving assembly is arranged on the circumferential moving assembly, a multi-degree-of-freedom mechanical arm is arranged on the axial moving assembly, and the axial moving assembly is used for adjusting the position, relative to the axial direction of the pipe fitting, of the multi-degree-of-freedom mechanical arm; and the welding gun is arranged on the multi-degree-of-freedom mechanical arm. The technical problems that a welding robot is poor in adaptability to pipelines, insufficient in welding capacity and low in moving flexibility are solved.

The utility model discloses a bearing seat machining device which comprises a machine body and a machining mechanism arranged on the machine body, an installation station is arranged on the machine body and used for installing a bearing seat, and the machining mechanism is arranged on one side of the installation station and used for machining the bearing seat. The mounting station comprises a driving unit arranged on the machine body; the rotating disc is arranged above the driving unit and can rotate along with the driving unit; the mounting disc is coaxially arranged on the rotating disc, a plurality of positioning pieces are arranged on the mounting disc, the distance between the positioning pieces can be adjusted, and the positioning pieces are matched with the bearing seat. The rotary welding device can be used for rotatably welding the bearing seat, improves the welding effect and efficiency, can be matched with bearing seats of different specifications, and improves the mounting stability of the bearing seat.

The utility model belongs to the technical field of building construction, and particularly relates to a steel structure welding device which comprises a bearing base, a guide groove is formed in the top of the bearing base, and a building steel pipe preheating mechanism is arranged at the top of the bearing base. One end of the supporting arm is fixedly connected with the other side of the sliding side plate, and the preheating assembly is connected with the other end of the supporting arm, so that a threaded screw rod can be driven to rotate by starting a driving motor, a threaded sleeve plate reciprocates on the threaded screw rod, and the sliding side plate is further driven to reciprocatingly move on one side of the supporting side plate; and then the preheating assembly is driven by the supporting arm to conduct reciprocating constant-speed preheating on the welding point position, so that the preheating process is more efficient, hot air can be discharged from air nozzles after passing through a connecting hose and a preheating sleeve plate by starting an air heater, all-directional preheating can be conducted on the steel pipe welding point position through the multiple air nozzles, and the welding point position is more uniform in preheating. And the uniformity is effectively improved, so that the welding effect is also effectively improved.

The invention relates to the technical field of pipeline machining, in particular to a hydraulic engineering pipeline cutting and welding integrated device which comprises a mounting base, two clamping seats are arranged at the top of the mounting base, circular through grooves are formed in the clamping seats, and clamping and fixing mechanisms are connected into the circular through grooves. An opposite moving mechanism is connected between the two clamping seats, two fixing frames are fixedly connected to the top of the mounting base, and a cutting machine is arranged in each fixing frame; the distance between the welding gun and the pipeline is kept synchronous all the time under the action of the elastic receding mechanism, and when the pipeline is subjected to slope cutting and the cutting face is oval, the welding gun can still keep the same moving distance under the oval moving track, so that the welding effect of the pipeline is improved, and the welding efficiency is improved. And the welding difficulty caused by the change of the pipeline cutting angle is reduced.

The invention discloses a heat conduction pipe production welding device, and relates to the field of heat conduction pipe welding, the heat conduction pipe production welding device comprises an inner supporting rod, the surface of the inner supporting rod is coated with an expansion layer, the inner supporting rod is internally provided with a flow guide channel, and the expansion layer has a tensioning state and a contraction state and is tightly attached to the surface of the inner supporting rod in the contraction state; the maximum diameters of the inner supporting rod and the expansion layer are smaller than the diameters of the heat conduction pipe and the circular pipe; according to the heat conduction pipe production welding device, through the arranged inner supporting rod and the expansion layer on the inner supporting rod, the inner supporting rod can easily enter the middle of a heat conduction pipe and the middle of a round pipe with the small diameter when the expansion layer is in a contraction state, and when the expansion layer is in an expansion state, a gap formed when the diameter of the inner supporting rod is smaller than the diameter of the heat conduction pipe and the diameter of the round pipe can be made up; and meanwhile, after welding is completed, the expansion layer is switched to the contraction state, the gap is formed again, and therefore the inner supporting rod can be conveniently moved out of the inner walls of the heat conduction pipe and the circular pipe.

The present application provides an automatic welding device for battery terminals, belonging to the field of welding technology, comprising a clamping mechanism for clamping the terminal on the battery, a clamping and positioning mechanism for adjusting the position of the battery and clamping the battery, and a moving mechanism for synchronously moving the support block when the position of the battery is adjusted; the clamping mechanism comprises a mounting block slidably connected to a frame, a support block is arranged on the mounting block, a pressure plate is arranged under the support block, a guide rod is connected to the pressure plate, the guide rod is slidably connected to the support block, a first return spring is sleeved on the guide rod between the pressure plate and the support block, and a first linear drive is installed on the mounting block; the clamping and positioning mechanism comprises a pair of clamping blocks, a driving assembly is arranged on the mounting block, and the driving assembly is used to drive the clamping blocks to move toward each other; the present application can keep the position of the terminal on the battery unchanged during the positioning process of the battery, thereby ensuring the positioning effect of the terminal and being beneficial to improving the welding effect.

The invention discloses an all-position pipeline welding device, and particularly relates to the technical field of pipeline welding devices.The all-position pipeline welding device comprises a shell, semi-circular tables are fixedly connected to the rear side edge of the left portion of the upper end of the shell and the front side edge of the left portion of the upper end of the shell, and a covering assembly is jointly slidably mounted on the outer surfaces of the two semi-circular tables; and a marking assembly is slidably installed on the inner surface of the covering assembly, clamping assemblies are slidably installed on the inner surface of the shell and the inner surface of the covering assembly, a grinding assembly is fixedly installed on the bottom wall of the shell, and a driving assembly is slidably installed at the rear end of the shell. According to the all-position pipeline welding device, the covering assembly and the marking assembly are arranged and used in cooperation, the surface of a pipeline needing to be welded can be marked before the pipeline is welded, the welding position of the pipeline can be conveniently adjusted, and the situation that the welding position deviates is avoided; and pipelines of different specifications can be limited and clamped.

The utility model discloses a movable semi-automatic steel structure welding device which comprises a movable welding table, sliding blocks are installed on the two sides of the upper end of the movable welding table in a sliding mode, a lower base plate is installed at the upper ends of the sliding blocks, lifting threaded rods are connected to the two sides of the upper end of the lower base plate in a rotating and clamping mode, and an upper pressing plate is installed on the lifting threaded rods in a threaded mode. And a fixed seat is fixedly installed in the middle of the upper end of the movable welding table, an annular rotating rail is fixedly installed at the upper end of the fixed seat and located between the two sliding blocks, a rotating ring is rotationally clamped in the annular rotating rail, and a welding gun is installed on the inner side of the rotating ring. According to the movable semi-automatic steel structure welding device, steel can be fixed through the lower base plate and the upper pressing plate and cannot shake during welding, so that the welding effect is improved, meanwhile, the welding gun is driven by the rotating ring to move, a welding worker does not need to hold the welding gun by hand for welding, and the safety during welding is improved.

The invention relates to the technical field of section steel welding, in particular to a cold-formed section steel forming and welding method which comprises the following steps: S1, cleaning a welding position and nearby parts of cold-formed section steel, preheating the welding position by adopting a low-voltage high-current resistance heating mode after cleaning, and after the preheating treatment is finished, welding the cold-formed section steel by adopting a low-voltage high-current resistance heating mode; a soldering flux is smeared on the welding position, and a welding gun is used for conducting welding operation on the welding position; and S2, continuously collecting weld joint images through an industrial camera, fitting image data to obtain a surface contour image of a weld joint area, performing three-dimensional reconstruction on the surface contour image to obtain three-dimensional point cloud data of the weld joint area, evaluating the quality of the weld joint according to the three-dimensional point cloud data, and performing repair welding treatment on unqualified weld joints according to an evaluation result to obtain a repair welding result. According to the method, the problems that the welding effect is poor and the welding quality cannot be evaluated when the cold-formed section steel is welded in the prior art can be effectively solved.

The invention belongs to the technical field of precious metal electronic paste, and particularly relates to a preparation method and application of submicron spherical gold-platinum-palladium alloy powder used for being matched with low-temperature co-fired ceramics. The preparation method comprises the following steps: mixing a tetrachloroauric acid solution, a hexachloroplatinic acid solution and a tetrachloropalladium (II) acid solution to obtain a gold-platinum-palladium mixed solution; the gold-platinum-palladium mixed solution, the dispersing agent solution and the modified reducing agent solution are mixed for a second time, after a reduction reaction is conducted, static settlement and solid-liquid separation are conducted in sequence, obtained solids are washed and dried in sequence, and the obtained submicron spherical gold-platinum-palladium alloy powder used for being matched with the low-temperature co-fired ceramic has the advantages of being uniform in particle size, free of agglomeration, high in dispersity and the like. After low-temperature co-firing with a ceramic substrate, the substrate has the characteristics of flatness, no bubble, excellent weldability and soldering resistance, good batch stability and the like.

The invention relates to the technical field of welding, in particular to a pressure vessel vertical girth welding device which comprises a base, a fixed rotating rod is fixedly connected to the top of the base, a supporting framework is rotatably connected to the surface of the fixed rotating rod, and a limiting sliding rod is fixedly connected to the top of the supporting framework. One end of the limiting sliding rod is fixedly connected with a motor set, and a front fixing frame, a rear fixing frame and a rotating base are movably inserted into the limiting sliding rod in a penetrating mode. According to the vertical girth welding device for the pressure vessel, the hydraulic push rod of the base can turn over the fixing device by an angle, so that the problems that the pressure vessel is large in size and heavy are solved, the pressure vessel can be conveniently placed, fixed, taken and carried when being horizontally placed, and the pressure vessel is lifted to a corresponding angle when being welded; the problem of circumferential welds of the pressure vessel is solved.