5814results about "Tubular articles" patented technology

The invention discloses a multi-mechanical-arm space-time synchronization control method for coiled pipe welding, and belongs to the technical field of automation control, and the method comprises the steps: in a primary laser and TIG hybrid welding execution stage, carrying out real-time data acquisition on a welding area of a workpiece, carrying out real-time deviation detection, and once real-time welding deviation is detected, carrying out time-space synchronization on the welding area of the workpiece; a local correction mechanism is triggered immediately, and deviation is prevented from being accumulated in the single welding process; after one-time welding is completed, the workpiece enters a transition area, global contour reconstruction is conducted on a welded section of the workpiece through three-dimensional scanning equipment, global deviation recognition is conducted, and unprocessed hysteresis deformation and accumulative errors are covered and corrected in real time; on the basis of the analysis result of the global deviation recognition, double correction is conducted on secondary welding, and cooperative control over space track correction and technological parameter adaptation is achieved; and after secondary welding is completed, the correction effect is evaluated through a double-layer evaluation mechanism, and the stability of the correction process is ensured.

The invention discloses a pressure pipeline welding device, and relates to the technical field of pipeline welding, the pressure pipeline welding device comprises a machine base and a cross beam installed on one side of the machine base, a guide rod and a rotating rod are connected to the two sides of the top of the machine base in parallel, and a fixing base for providing pipeline alignment outer ring welding support is installed in the middle of the machine base. According to the pressure pipeline welding device, the inner welding gun is used for carrying out inner circumference root welding treatment on the inner groove of the abutted seam, and then the outer welding gun with the adjustable angle is used for carrying out outer circumference root welding and wave welding on the outer groove of the abutted seam in sequence; the traction assembly is used for pulling the pipeline clamped by one clamping mechanism to abut against the pipeline clamped by the other clamping mechanism, so that the abutted seam gap between the two to-be-welded pressure pipelines is reduced during welding, and it is guaranteed that abutting welding is achieved for inner and outer abutted seam grooves of the pressure pipelines during welding; and it is ensured that the welding device can achieve high-quality welding on the pressure pipeline.

The invention relates to the technical field of laser pipe cutting machining, and discloses a laser pipe cutting machine machining optimization method for small pipes. The method comprises the following steps: acquiring three-dimensional point cloud data of a to-be-processed pipe, and extracting a pipe axis direction vector and pipe wall thickness distribution data through geometric topology analysis; a dynamic machining coordinate system is established based on the axis direction vector, and the theoretical projection position of the laser focus in the coordinate system is calculated; material absorption characteristic parameters are matched according to the pipe wall thickness distribution data, and a laser power density gradient adjusting instruction is generated; monitoring the radial run-out amount in the rotating process of the pipe in real time, and generating a laser focus track compensation parameter in combination with a theoretical projection position; and finally, the laser power density gradient adjusting instruction and the focus track compensation parameters are fused to generate a cutting path control signal, and a laser cutting head is driven to complete machining. According to the method, the problems of insufficient precision and unstable quality in the machining process of small pipes are effectively solved, and the machining adaptability is improved.

The invention discloses a robot welding pipeline flange displacement special clamp, and relates to the technical field of ship manufacturing equipment, the clamp comprises a processing table, a welding mechanical arm, a placing mechanism, two groups of pipeline clamping mechanisms, two groups of flange fixing mechanisms, a traction mechanism, a rotating platform and three screw rod sliding tables; the placing mechanism is slidably mounted in the middle of the machining table through the rotating platform, and the two pipeline clamping mechanisms are symmetrically slidably mounted on the two sides of the placing mechanism and can synchronously move and clamp pipelines. The two flange fixing mechanisms are symmetrically arranged on the two sides of the containing mechanism and horizontally move through a lead screw sliding table. The traction mechanism is connected with the machining table through a lead screw sliding table and can lock / unlock the rotating platform and drive the containing mechanism to move. The welding mechanical arm is in linkage with the clamp and can conduct welding along the butt joint axis. Multi-degree-of-freedom posture adjustment of a pipeline and a flange can be achieved, a straight pipe and a 0-90-degree bent pipe are matched, it is guaranteed that welding is in a horizontal butt joint state all the time, and the welding quality and efficiency are improved.

The invention provides an intelligent pipeline welding method and system based on data decision, and relates to the technical field of intelligent pipeline welding.The intelligent pipeline welding method comprises the steps that a welding request is responded, a groove image of a to-be-welded pipeline is obtained through an active visual sensor, groove morphology characteristic parameters of the to-be-welded pipeline are determined based on the groove image, and the to-be-welded pipeline is welded according to the groove morphology characteristic parameters. Based on the groove morphology characteristic parameters, corresponding basic layer channel arrangement rules and reference process parameters are determined from a preset layer channel arrangement database, a welding process scheme matched with the current groove is generated in combination with the groove morphology characteristic parameters, and the current groove is welded on the basis of the welding process scheme. And the welding operation is executed in the groove of the to-be-welded pipeline, the technical problems that in the prior art, the global planning capacity is deficient, the deviation correction strategy is locally lagged, and the whole-process accurate control is insufficient are solved, and the effect of improving the stability and reliability of the welding quality of the pipeline is achieved.

The invention provides an auxiliary device for steel pipe construction welding, and relates to the technical field of pipeline welding, and the auxiliary device comprises two arc-shaped bearing bodies, an auxiliary main frame, an aligning mechanism and a rotary driving system. The central angle of the arc-shaped bearing body is larger than 180 degrees, automatic centering of the steel pipes is achieved through the outer pressing supporting rod assembly and the inner positioning supporting rod assembly, and it is guaranteed that the two sections of steel pipes are concentric. And the welding head mounting seat is connected with the rotary driving piece through the arc-shaped movable clamping body to drive the welding head to continuously rotate around a welding seam, so that high-quality girth welding is completed. The device solves the problems of low centering precision and poor efficiency in traditional welding, has the advantages of high automation degree, high stability, convenience in assembly and disassembly and the like, and is suitable for quick welding of municipal steel pipe engineering.

The invention discloses a steel pipe cutting machine capable of preventing splashing scrap iron from adhering to a pipe opening and a cutting process. The steel pipe cutting machine comprises a laser cutting device, a scrap iron collecting assembly and a displacement pushing assembly. The laser cutting device comprises a cutting machine tool, and a cutting chuck and a laser cutting head which are arranged on the cutting machine tool. The displacement pushing assembly can clamp the tail end of the machined pipe fitting and gradually drive the machined pipe fitting to move towards one side of the laser cutting device. The slag receiving head is arranged in the to-be-machined pipe fitting, and in the laser cutting process, the slag receiving head can rotate relative to the to-be-machined pipe fitting, so that the slag receiving opening in the slag receiving head is always right opposite to the laser cutting head. The slag receiving head receives the scrap iron splashed to the inner pipe wall of the machined pipe, so that the scrap iron can be prevented from being attached to the pipe wall of the machined pipe, and secondary damage to the pipe wall of the machined pipe due to the fact that the scrap iron needs to be shoveled is avoided while the influence on subsequent machining is avoided.

The invention discloses an automatic plastic pipeline winding machine, and relates to the field of plastic pipeline production, the automatic plastic pipeline winding machine comprises a mold driving mechanism, a winding mold pipe and a formed plastic pipe conveying mechanism, the mold driving mechanism comprises a base, a sliding bottom plate and roller carriers, the sliding bottom plate is slidably mounted on the base, and multiple groups of roller carriers are mounted on the sliding bottom plate at intervals; the winding mold pipe is arranged on the roller frame, a cooling pipe is fixedly installed in the winding mold pipe, a plurality of independent cooling cavities are formed between the inner wall and the outer wall of the winding mold pipe in the axial direction of the winding mold pipe, each cooling cavity is provided with an air inlet hose, and the two ends of each air inlet hose are connected with the corresponding cooling pipe and the inner wall of the winding mold pipe correspondingly; the heating mechanism comprises a flame gun installed towards the winding die pipe, the formed plastic pipe conveying mechanism is used for conveying a material belt to the winding die pipe and conveying a plastic pipe to the wound material belt, on one hand, the shrinkage pulling force generated by later cooling is reduced, and on the other hand, the winding coverage area of the front and rear material belts is reduced.

The invention relates to the technical field of spiral finned tube laser welding, in particular to a solid spinning spiral finned tube laser welding machine. Comprising a first base and a second base, a threaded rod is rotationally connected between the first base and the second base, and the threaded rod is in threaded connection with a machining assembly; the first motor drives the driving belt wheel to rotate, so that the machining assembly conducts welding operation of the spiral fins on the surface of the base tube while moving, and through the transmission relation between the driving belt wheel and the driven belt wheel, the base tube synchronously rotates while the machining assembly conducts moving machining; according to the spiral finned tube machining device, the machining assembly is arranged to meet the welding requirement of the spiral finned tube, movement of the machining assembly and rotation of the base tube are controlled at the same time through the same driving structure, the stability and consistency in the machining process are improved, the machining speed can be adjusted more conveniently, fin welding is more uniform, and the welding quality is effectively improved.

The invention belongs to the technical field of 3PE corrosion prevention, and particularly relates to a high-temperature-resistant and cathodic disbonding-resistant 3PE corrosion-resistant pipeline and a preparation method thereof. A pipeline epoxy bottom layer, a middle adhesive layer and a polyethylene surface layer are subjected to systematic chemical synergistic modification, specifically, the epoxy bottom layer is modified with phenolic resin and amino silane, and a heat-resistant compact barrier is formed; the middle layer reacts with maleic anhydride grafted polyethylene through amino silane to construct a chemical bridge for simultaneously connecting the upper layer and the lower layer; the surface layer is grafted with high-density polyethylene through fluoroprimary amine modified glycidyl methacrylate, and a hydrophobic and oleophobic chain and a reactive functional group are introduced; according to the structure, through the synergistic effect of the high-temperature stability of the bottom layer, the two-way chemical bridging capacity of the middle layer and the inert hydrophobic characteristic of the surface layer, the long-term use temperature upper limit, the stripping resistance and the medium infiltration resistance of the pipeline are improved, and a solution is provided for long-term protection of the pipeline in the severe environment.

The invention discloses a welding device for a steel pipe for a tent, and relates to the technical field of welding, the welding device comprises an operation table and a fixing and adjusting unit, the fixing and adjusting unit comprises an adjusting assembly arranged at the top of the operation table and a fixing assembly arranged at one end of the adjusting assembly, and the adjusting assembly can adjust the bending angle of the fixing assembly to be matched with welding of an arc-shaped steel pipe. When special-shaped and bent steel pipes are welded, one end of the steel pipe is firstly placed in the fixing assembly, the fixing assembly drives the clamping assembly to fix the steel pipe, and the clamping assembly can be automatically adjusted according to the shape of the steel pipe to adapt to the special-shaped steel pipes in different shapes, so that full-wrapping fixing is achieved, and the steel pipes can be welded through the functions of self-adaptive clamping, angle adjustment, multi-angle welding and the like. The welding efficiency is improved, the stability of the welding quality is enhanced, and the problems of unstable fixation and unstable welding quality caused by complex shape in traditional welding are effectively avoided.

The invention discloses a refrigeration pipe welding positioning method and device. The method comprises the following steps that S1, branch pipes are placed in all storage boxes; s2, the main pipeline is placed in a matching groove of the supporting frame, and the main pipeline is fixed through cooperation with a pressing ring; s3, a third electric cylinder is started, the third electric cylinder drives a supporting frame and the main pipeline to move to be close to the welding gun, and a branch pipe of the main pipeline moves to cross the welding gun; s4, a first electric cylinder is started, and the first electric cylinder drives a synchronous plate and an ejector sleeve to move; the motor, the first chain wheel, the second chain wheel, the chain and the hollow rotating disc are matched to drive the vortex line groove and linear groove linkage adjusting block and the rolling wheel to move, the purposes of clamping positioning and circle center correction of the branch pipe are achieved, the branch pipe is corrected to the position concentric with the disc, the coaxiality of the branch pipe and a main pipeline branch pipe is guaranteed, and the machining efficiency is improved. And the quality problems of insufficient welding, welding skips, poor welding seam forming and the like caused by positioning deviation are avoided.

The invention relates to the technical field of spaceflight material forming, in particular to a tension control winding process of a spaceflight carbon fiber composite launch canister, which comprises pretreatment, winding forming, curing and post-treatment. The method comprises the following steps: S1, coating a release agent and a modified coating after processing a core mold, carrying out plasma treatment and eliminating stress; the carbon fiber filaments are soaked in resin containing nanometer components, and are pre-stretched after a hot melting reaction; s2, closed-loop tension control is conducted, winding is conducted according to segmented angles, and modified resin is coated between layers to be overlapped in a crossed mode; s3, stepwise heating and curing, dynamically regulating the pressure and introducing inert gas; and S4, polishing after hydraulic demolding, carrying out sand blasting, carrying out transition layer and ceramic coating, and carrying out multi-dimensional detection. According to the process, the mechanical property and environmental adaptability of the launch canister are improved, the process precision is high, defects are reduced, the forming time is shortened, the rework rate and cost are reduced, the spaceflight requirement is met, and the process is suitable for batch production.

The invention relates to the technical field of production processes of plastic composite pipes, and particularly discloses a production process of a PVC-C ardealite industrial fluid steel-plastic composite pipe, which comprises the following steps: step 1, adopting resin as a raw material, and producing an inner plastic pipe by using a twin-screw extruder; 2, the outer surface of the inner plastic pipe is evenly coated with a hot melt adhesive layer through a hot melt adhesive extruder; 3, the steel takes a steel belt as a raw material, the inner plastic pipe is wrapped to produce the spiral steel pipe, and 4, heat is induced outside the spiral steel pipe to enable the hot melt adhesive layer to be secondarily melted to bond the spiral steel pipe and the inner plastic pipe; and 5, after high-frequency heating of the spiral steel pipe, the outer surface of the steel pipe is rapidly coated with an outer rubber layer and an outer plastic layer made of PVC-C materials, and a finished pipe is obtained after cooling. The technical problems that in the prior art, when a PVC-C steel-plastic composite pipe is produced, an inner pipe and a steel pipe are coated with hot melt adhesive to be combined into a whole in a sleeved mode after being produced respectively, the steel pipe and the inner pipe are connected only through the hot melt adhesive, the bonding strength is limited, and steel-plastic separation exists are solved.

The invention relates to the technical field of pipe fitting laser welding, and discloses a laser welding device and process for machining a large-diameter thin-wall low-thermal-expansion alloy pipe, and the laser welding device for machining the large-diameter thin-wall low-thermal-expansion alloy pipe comprises a machine body, a welding table arranged on one side of the machine body, and a supporting assembly arranged on the welding table and used for supporting. The two alloy pipes are arranged at the top of the supporting assembly and used for welding, the laser welding gun is arranged on the welding table and located on one sides of the alloy pipes, the rotating motor is arranged on one side of the machine body, the clamping base is arranged on one side of an output shaft of the rotating motor, and the clamping unit is arranged on the clamping base. Local stress concentration is avoided through cooperation of air bag clamping and a moving plate, an air bag cavity of the clamping assembly is matched with the moving plate of the auxiliary assembly to form a two-way pressure control structure, when the air bag is inflated and expanded, directional expansion can be achieved, the clamping contact area can be enlarged, and thin wall sinking caused by point contact or line contact is avoided.

The invention relates to the technical field of plastic-lined pipe production, in particular to an automatic bonding device for large-diameter plastic-lined pipe production. The invention provides an automatic bonding device for large-diameter plastic-lined pipe production, which can adapt to plastic-lined pipes with different pipe diameters and ensure the bonding quality and the production efficiency of the plastic-lined pipes. An automatic bonding device for large-diameter lining plastic pipe production comprises a base, side plates and the like, and the side plates are connected to the upper sides of the left portion and the right portion of the base. After a metal pipe penetrates through a heat conduction ring and a water spraying ring, a contact roller makes contact with the outer wall of the metal pipe, a high-temperature-resistant rubber ring and a shaping rubber block are extruded by the outer wall of the pipe to deform, and gaps between the heat conduction ring and the pipe are filled in a self-adaptive mode, so that the gaps of the same size are always kept between alumina fiber heat preservation cotton and the outer walls of the metal pipes with different pipe diameters; and the effects that the device can adapt to the plastic-lined pipes with different pipe diameters, and the bonding quality and the production efficiency of the plastic-lined pipes are ensured are achieved.

The present disclosure relates to an automated gas tungsten arc welding system for flexible hoses. The Mini Flexi Hose Welder is a breakthrough innovation for welding stainless steel flexible hoses, corrugated hoses, sleeves, and adaptors. Utilizing GTAW with wire feeding, it ensures precise welds on components ranging from 5 mm to 65 mm diameter. Automatic setting capabilities adjust height, diameter, and offsets, enhancing accuracy. Cloud monitoring enables real-time monitoring of welded components. Energy-efficient at <400 W, its compact user-friendly design offers an out-of-the-box automated solution. Addressing limitations of traditional welding for flexible hoses, this system caters to industries requiring high-quality, efficient welding of these components. Its specialized features, including automatic settings, cloud monitoring, and energy efficiency, make it a versatile and reliable choice for welding flexible hoses.

The invention discloses a high-density polyethylene silicon core pipe and a preparation method thereof, and relates to the technical field of silicon core pipes. The high-density polyethylene is subjected to modification treatment in different modes to obtain different modified high-density polyethylene; different modified high-density polyethylene is used as a main component, and a silicon core pipe outer-layer mixture and a silicon core pipe inner-layer mixture are prepared respectively; finally, the silicon core pipe outer layer mixture and the silicon core pipe inner layer mixture are subjected to melt co-extrusion, Si-O-C chemical bonding is generated on the inner layer and the outer layer, and the high-density polyethylene silicon core pipe is obtained. The high-density polyethylene silicon core pipe prepared by the invention is very high in interlayer bonding strength and very excellent in flame retardant property and mechanical property.

The invention discloses ventilation pipeline welding supporting equipment, relates to the technical field of ventilation pipeline welding, and aims at solving the technical problem that a traditional supporting device is insufficient in functionality. A center driving assembly, at least two outer edge supporting assemblies and an end supporting assembly are sequentially arranged on the main body rail frame from the input end to the output end. Welding assemblies are arranged on the outer sides of the two outer edge supporting assemblies; the welding end of the welding assembly is arranged in the gap between the two outer edge supporting assemblies in a penetrating mode. The driving type pushing mechanism has an intermittent pushing state and a continuous pushing state, and the driving type pushing mechanism is matched with the center driving disc frame to conduct continuous rotating work or intermittent rotating work, so that the ventilation pipeline welding supporting equipment conducts welding work on a circular pipeline of a spiral curling preparation technology; the welding work of the circular pipeline of the circular pipeline unit segmented welding preparation process is conducted; through cooperation of the dual-mode driving mechanism and the reconfigurable supporting system, the limitation of the single function of traditional equipment is broken through.

The application discloses a submerged-arc welding straight seam steel pipe pre-welding deviation rectifying device and belongs to the field of steel pipe welding. The submerged-arc welding straight seam steel pipe pre-welding deviation rectifying device comprises supporting legs, the top of the supporting legs is fixedly connected with a working plate, the front end top of the working plate is fixedly installed with a first clamp, the rear end of the first clamp is provided with a second clamp, the right side top of the working plate is provided with a welder, the lower portion of the welder is provided with an alignment assembly, the alignment assembly comprises a supporting plate, the top of the supporting plate is fixedly connected with the bottom of the second clamp, the bottom of the supporting plate is fixedly connected with the top of a sliding block, and the bottom of the sliding block is slidingly connected in a limiting frame. Through the setting of the alignment assembly, the two ends of the pipeline can be centrally aligned when the welder welds the pipeline, and the welding result can be effectively prevented from being affected by the deviation problem during the welding of the steel pipe.

The invention provides a welding method and equipment with self-adaptive spatial all-position welding process parameters, and the method comprises the steps: obtaining a plurality of structured light images of a groove of a to-be-welded region through a laser visual sensor, calculating the image feature information corresponding to each image, marking the region between the structured light images of the groove of two adjacent to-be-welded regions as a regulation region, and carrying out the adjustment and control of the region; and calculating each regulation and control area to obtain the volume of a to-be-welded sub-area corresponding to the currently set cladding layer, and inputting the structured light image of the groove of the to-be-welded area, the image feature information, the regulation and control distance and the volume of the to-be-welded sub-area into a trained CNN model to obtain a plurality of groups of welding process parameters, so that in the welding process, a plurality of groups of welding process parameters are obtained. And corresponding welding process parameters are called for each regulation and control area for welding, so that the welding requirements of complex groove working conditions are met, and the welding quality can be improved.

The invention discloses a wire harness sleeve laser cutting jig, and relates to the technical field of cutting jigs, the wire harness sleeve laser cutting jig comprises a fixing bottom plate, the fixing bottom plate is fixedly connected to a laser cutting machine, fixing seats are fixedly connected to the upper surface of the fixing bottom plate at equal intervals, and connecting plates are fixedly connected to the upper surfaces of the fixing seats; and meanwhile, the upper surface of the connecting plate is fixedly connected with a cutting sleeve and an auxiliary cylinder. According to the jig for wire harness sleeve laser cutting, an operator can carry out flexible and accurate selective assembling operation on the cutting sleeve by means of the fixing base according to the actual machining number of wire harness sleeves and preset spacing parameters, and when the sleeve cutting operation is carried out, the sleeve is arranged on the outer side of the fixing base in a sleeving mode firstly, and then the cutting sleeve is arranged on the outer side of the fixing base in a sleeving mode; the fixing base can provide stable and reliable supporting force for the casing pipe, the situation that the casing pipe deforms due to factors such as uneven stress in the subsequent cutting process is effectively avoided, then the situation that the cutting effect is poor due to deformation is completely eradicated, and finally the cutting efficiency and quality of the casing pipe are remarkably improved.

The invention discloses a multi-station clamping tool for laser welding and a temperature control method of the multi-station clamping tool, and relates to the technical field of clamping tools, the multi-station clamping tool comprises a rack, a moving mechanism and a driving mechanism, a controller is installed on one side of the rack and used for controlling the clamping tool, the bottom of the rack is connected with the moving mechanism, and the moving mechanism is connected with the driving mechanism. The number of the moving mechanisms is two, one moving mechanism is connected with the driving mechanism, in the welding process, when a steel pipe rotates, a welding seam makes contact with a rolling shaft, if the welding seam is too thick, the rolling shaft can move upwards, an infrared sensor is triggered to detect the change of a displacement threshold value, and therefore an operator is reminded to conduct treatment in time, and the welding quality is ensured; external high-temperature and high-pressure gas is injected into the steel pipe through the second plug, heating and heat preservation are conducted on a welding area through the heat conduction effect of the gas, the situation that a welding seam is rapidly cooled due to the low environment temperature is prevented, cracks are avoided, and therefore the welding efficiency and quality are effectively improved.

The invention discloses a high-strength composite pipe manufacturing method, and relates to the technical field of composite pipe production, and the method comprises the following steps: S1, inner ring welding: arranging and guiding inner ring reinforcing warps through a front end winding welding seat, and welding inner ring spiral wefts to the outer sides of the inner ring reinforcing warps through electric sparks, s2, mesh belt winding: wrapping a middle-layer steel wire mesh belt on the outer side of an inner-ring spiral weft through a middle-layer mesh belt winding welding seat, welding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through electric sparks, and winding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through a middle-layer steel wire mesh belt winding welding seat; the operation stability of production equipment is improved, the convenience of replacement and adjustment of the mesh belt storage roller is effectively improved, a mesh framework is formed by continuous online welding of warp-direction steel wires and inner and outer weft-direction steel wires, and the mesh framework and steel-plastic formed by one-time co-extrusion composite molding of polyethylene plastic penetrate through each other in a three-dimensional mode and are embedded with each other to jointly bear the working load.

The utility model discloses an oil pipe forming die which comprises a die body, the die body comprises a movable runner plate, and a first forming assembly, a second forming assembly, a third forming assembly and a fourth forming assembly are arranged in the die body. A first side core-pulling assembly, a second side core-pulling assembly, a third side core-pulling assembly, a fourth side core-pulling assembly and a fifth side core-pulling assembly are further arranged in the mold body, the first forming assembly is connected with the first side core-pulling assembly, and the first forming assembly and the second forming assembly are arranged in a spaced mode and connected through the second side core-pulling assembly. The third forming assembly and the second forming assembly are arranged in a spaced mode and connected through a third side core-pulling assembly, the fourth forming assembly and the third forming assembly are arranged in a spaced mode and connected through a fourth side core-pulling assembly, and the fourth forming assembly is further connected with a fifth side core-pulling assembly. According to the utility model, the core-pulling assemblies are linked to synchronously pull the core and demould the pipe column, so that the core-pulling demoulding device is applicable to the processing and manufacturing of automobile oil pipes.

A method of joining polymer-lined pipe sections end-to-end comprises friction welding a polymer liner bridge fitting to parent liners of the pipe sections and welding metallic outer pipes of the pipe sections to each other before, during or after the friction welding operation. The fitting may be engaged telescopically with the pipe sections in socket formations formed by the parent liners. Friction welding is effected by relative rotational movement between the fitting and the pipe sections about a common longitudinal axis. A spinning tool is advanced longitudinally within at least one of the pipe sections, inserted into the fitting, anchored within at least one of the pipe sections, engaged with the fitting and rotated to effect the relative rotational movement. This friction-welds the fitting to the parent liners simultaneously at interfaces located at respective ends of the fitting.

The invention discloses a welding device for flange plate machining, and relates to the technical field of welding devices. Comprising an operation table, a plurality of first supporting plates are arranged on the inner wall of a pipeline at equal angles, an inner supporting assembly is arranged on one side of a base, a supporting assembly is arranged on one side of the inner supporting assembly, a plurality of second supporting plates are arranged on the inner wall of a flange at equal angles, an adjusting assembly is arranged on one side of a welding gun, and an abutting assembly is arranged on one side of the flange. By arranging the moving ring, the rolling wheels, the rotating rod and other structures, when the moving ring moves, the rolling wheels in the moving ring are driven to move, and then the rotating rod is driven to rotate, the rotating rod is fixedly connected with the telescopic plate through the connecting shaft, so that the telescopic plate is driven to rotate, and then the angle of the welding gun is adjusted; the angle of the welding gun is changed in a self-adaptive mode through different pipeline wall thicknesses, the weld penetration performance is guaranteed, incomplete penetration or incomplete fusion is avoided, weld forming is optimized, and geometric accuracy is guaranteed.

The invention discloses a welding mistake proofing device for a new energy automobile welding part, and relates to the technical field of welding equipment. The laser welding device comprises a base, an adjusting ring is arranged on the top of the base, and a laser welding head is installed in the adjusting ring; a detection assembly is arranged at the top of the base and comprises a supporting shell installed on one side of the adjusting ring. Through the synergistic effect of the detection assembly and the adjusting assembly, real-time monitoring and angle dynamic adjustment of the fitting degree of two sets of pipeline workpieces are achieved, a pressure sensor can accurately recognize the eccentricity or dislocation problem during pipeline butt joint through pulley stress feedback, a driving motor is matched with a belt transmission system to drive an adjusting ring to rotate, and the fitting degree of the two sets of pipeline workpieces is adjusted. Compared with a traditional single-pipeline clamping device, the alignment problem during double-pipeline splicing is effectively solved, the problems of insufficient weld joint strength, poor sealing performance and the like caused by eccentricity are avoided, and the welding quality and the reliability of a new energy automobile pipeline system are remarkably improved.

The invention relates to the technical field of composite pipelines, in particular to a continuous fiber winding reinforced polyethylene composite pipe and a preparation method of the continuous fiber winding reinforced polyethylene composite pipe. The fiber reinforced layer is wound on the inner-layer polyethylene pipe, the outer polyethylene protective layer is wound outside the fiber reinforced layer, and the outer reinforced pipe is wound on the surface of the outer polyethylene protective layer. The continuous fiber winding reinforced polyethylene composite pipe prepared by the invention has excellent flexibility, the production process is simple, the production efficiency is high, and all production procedures of multi-layer compounding can be realized through one station.

The utility model relates to the technical field of welding devices, and discloses a thin-wall copper pipe welding device which comprises a working table, the top of the working table is fixedly connected with a welding frame, the side wall of the working table is fixedly connected with a first servo motor, the output end of the first servo motor is fixedly connected with a first threaded rod, and the output end of the first threaded rod is fixedly connected with a second threaded rod. The outer surface of the first threaded rod is in threaded connection with a moving block, the top of the moving block is fixedly connected with a moving plate, and the side wall of the moving plate is fixedly connected with a second servo motor. According to the pipeline welding part polishing device, through the buffer block, the connecting rod, the stabilizing frame, the reset spring and the polishing block, the stabilizing frame is used for supporting a welding part, meanwhile, the polishing block is used for polishing the welding part of a pipeline, and the situation that workers are injured in the taking process due to the fact that the welding part is inconvenient to polish is avoided; and the working efficiency of the welding device is improved.