463 results about "Fusion welding" patented technology

The invention provides a multi-sensor fusion welding temperature monitoring method and a related device, and the method comprises the steps: dividing a welding region into a plurality of sub-regions according to the spatial distribution of the welding region, and obtaining the initial temperature data corresponding to each sub-region according to various temperature sensors; performing time alignment on the initial temperature data through difference resampling of different sampling points to generate a time sequence temperature matrix; performing real-time quality detection on the time sequence temperature matrix to generate a real-time quality score, and performing weighted combination on the real-time quality score and a preset confidence coefficient parameter table to obtain a dynamic confidence coefficient result set; fusing the effective temperature data exceeding a preset confidence threshold in the dynamic confidence result set according to a fusion rule corresponding to each sub-region to obtain a fused temperature result; and the fusion temperature results of the sub-regions are subjected to time sequence splicing to obtain a global temperature curve of the welding process, so that the accuracy of temperature detection in the welding process can be effectively improved.

The invention relates to the technical field of nuclear fusion devices, and discloses a fusion device cooling pipe welding method and welding device.The fusion device cooling pipe welding method comprises the following steps that two cooling pipes to be welded are prepared; an adapter is welded to the welding face of one cooling pipe, and the nickel content of the adapter is higher than that of the cooling pipe; the radial interior of the adapter and the to-be-welded face of the adapter are polished; the two cooling pipes are assembled, so that the welding face of the other cooling pipe is in butt joint with the to-be-welded face of the adapter; and carrying out self-fusion welding on the adapter and the other cooling pipe. According to the welding method for the cooling pipe of the fusion device, the problem that the magnetic conductivity of the cooling pipe exceeds the standard is solved, and meanwhile the welding quality and the welding qualification rate of the cooling pipe are improved.

The invention relates to the technical field of angle valve manufacturing, in particular to angle valve welding equipment and a working method thereof. According to the equipment, through cooperative operation of the integrated assembling device, the welding device, the gas testing device and the transferring device, automatic assembling, rotary type all-round welding, multi-station circulating detection and closed-loop material circulation of the valve body piece and the connector piece are achieved; wherein the assembling device ensures that a connector piece precisely slides to a valve body piece connecting hole by utilizing the height difference design of a transition groove and a first guide groove, and the welding device rotates relative to a welding gun through a rotating seat to complete the full-circumference fusion welding of a seam between the valve body piece and the connector piece. The gas testing device drives the fixing assembly to circularly flow through the cooling station, the testing station and the discharging station through the rotating disc to achieve seamless connection of detection procedures, and the transferring device executes transverse and longitudinal composite motion to guarantee efficient transferring of materials among the procedures. The whole set of system forms a continuous production line, and the assembly precision, the welding sealing performance and the airtightness detection efficiency of welded finished products are remarkably improved.

The invention discloses a laser-assisted helium arc penetration fusion welding method, and belongs to the technical field of welding. The problems that according to an existing paraxial laser-electric arc composite structure, the welding track is difficult to control, the energy coupling efficiency is low due to laser energy loss, and weld joint partial melting and undercut defects are caused due to uneven distribution of a welding temperature field due to a generated asymmetric heat source are solved. The welding method comprises the steps of 1, pretreatment; 2, after being focused by a focus lens, the laser is divided into three laser beams through a spectroscope, then the three laser beams are converged again through a plurality of reflectors, three fan-shaped light spots are formed on the surface of the to-be-welded plate after convergence, and finally the focal plane position of the laser is adjusted to be located on the surface of the to-be-welded plate; 3, setting welding current and arc voltage; and fourthly, laser is used for assisting helium arc penetration fusion welding. The method is used for laser-assisted helium arc penetration fusion welding.

The invention discloses a multi-gear adjusting rotary switch, which comprises a base, a shell cover, a rotary handle and a contact assembly, and is characterized in that the rotary handle is rotationally arranged between the base and the shell cover and is provided with a driving rod extending along the radial direction of the rotary handle; the contact assembly comprises a plurality of moving contact bridges which are annularly arranged in the mounting cavity with the axis of the rotating handle as the center and are of elastic structures, and a plurality of static contact pieces which are arranged on the base and are opposite to the plurality of moving contact bridges, and the plurality of moving contact bridges are connected and are located on the moving path of the driving rod. According to the technical scheme, the driving rod drives the multiple movable contact bridges to make contact with the multiple static contact pieces in the process of rotating along with the rotating handle, operation pressure is remarkably dispersed through an in-turn contact mechanism formed by the driving rod and the multiple movable contact bridges, continuous stress of a single movable contact bridge is avoided, the mechanical load and the fatigue degree of the movable contact bridges are greatly reduced, and the service life of the movable contact bridges is prolonged. The heating probability is reduced, abrasion and fusion welding risks are reduced, and the mechanical service life is prolonged.

The invention relates to the technical field of laser welding, and provides a high-speed laser welding wire box process based on multi-beam synergy, which comprises the following steps: step 1, at least three laser beams are adopted as a synergy composite heat source, a main laser beam is responsible for penetration fusion welding, and an auxiliary laser beam is responsible for preheating, post-heating or molten pool stabilization; when the copper-aluminum dissimilar material is welded, an auxiliary laser beam is switched into a green laser; and 2, assembling a multi-beam optical regulation and control unit comprising a diffractive optical element, a quartz field lens and a galvanometer scanning module, splitting a main beam into one main beam and two auxiliary beams through the diffractive optical element, controlling focal depth fluctuation by the quartz field lens, and realizing accurate movement positioning of a laser beam by the galvanometer scanning module. Through integration of multi-beam collaborative design and an intelligent control unit, remarkable breakthroughs are achieved in the aspects of welding efficiency, quality consistency and process adaptability, firstly, in the aspect of efficiency and process, the welding speed is greatly increased, multi-station synchronous operation of an automatic welding unit is matched, and the welding period of a single-line box is remarkably shortened.

The invention belongs to the technical field of non-woven materials and membrane separation, and particularly relates to a separation membrane supporting body with an interlocking structure and a preparation method thereof.The method comprises the steps that firstly, low-crystallinity and sulfonation-modified superfine polyester fibers are introduced into compact layer slurry, and framework polyester fibers and polyester heat bonding fibers are introduced into framework layer slurry; then forming a double-layer wet net by utilizing a double-flow-channel wet-process net forming device, applying gradient increasing negative pressure on one side of the skeleton layer, and enabling the superfine fibers to migrate from the compact layer to pores of the skeleton layer in a controlled manner by virtue of a viscous dragging effect of directional high-speed water flow on the superfine fibers, so as to form a gradient transition interlocking interface layer; finally, plastic deformation of the low-crystallinity fibers and fusion welding of the bonding fibers are utilized, an interlayer structure is locked through segmented hot pressing of a rough pressing section and a fine pressing section, and then cooling shaping is conducted. The prepared separation membrane support has the advantages of excellent interlayer peel strength, ultralow surface roughness, high air permeability, wide adaptability and high safety of the preparation process.

The invention discloses a method for determining the offset distance of a welding gun of a metal plate welding case lock bottom welding seam and a welding method, and belongs to the technical field of fusion welding technologies. The method for determining the offset distance of the welding gun comprises the steps that the machining side welding thickness L1, the metal plate side welding thickness L2 and the bottom locking thickness L3 of the metal plate welding case are obtained, and the axis offset P of a welding gun tungsten electrode and the center of a welding connector is calculated; based on the axis offset P, the opposite position of a welding gun tungsten electrode is determined, the offset angle theta over a welding bead and the diameter phi A of the welding bead are obtained, and the offset distance L between the opposite position of the welding gun tungsten electrode and the position over the welding bead is calculated; and based on the axis offset P of the welding gun tungsten electrode and the center of the welding joint and the offset distance L between the position right opposite to the welding gun tungsten electrode and the position right above the welding bead, the alignment position line of the tip end of the welding gun tungsten electrode is determined at the workpiece welding joint. The welding method comprises the steps that the position of the circumferential automatic welding gun mechanism is adjusted based on the alignment position line, and a welding gun is located in the welding bead upslope direction in the circumferential direction.

The invention discloses a construction method for prefabricating a concrete steel shell combined section in a factory, and relates to the technical field of bridge construction, and the construction method comprises the following steps: S1, manufacturing a wallboard unit; s2, the inner wall plate units are positioned, then the outer wall plate units are positioned, and then welding is conducted to manufacture steel shell segments; s3, annular structure concrete between the inner wall plate unit and the outer wall plate unit is poured, and steel shell concrete segments are formed; s4, secondary machining is conducted on the steel shell concrete segments; s5, vertical position continuous matching pre-assembly is carried out, after pre-assembly is completed, matching parts are installed, and marker lines are marked; s6, bridge site hoisting and positioning are conducted on the steel shell concrete sections; s7, outer wall plates of the steel shell concrete sections are subjected to butt-joint penetration welding, and then inner wall plates are welded; and S8, concrete pouring is conducted on bridge site ring openings of the steel shell concrete sections, and machining is completed. The technical problem that the construction period is prolonged due to prefabrication of the steel shell sections of the steel shell concrete tower in the prior art is solved.

The invention provides an automatic production line for collaborative operation of continuous vacuum laser deep penetration welding and workpiece surface oxidation pretreatment, and relates to the technical field of laser welding, the automatic production line comprises a grinding box, a laser processing box is arranged on one side of the grinding box, and inlets and outlets are formed in the two sides of the grinding box and the two sides of the laser processing box; a connecting channel is fixed to an inlet and outlet between the grinding box and the laser processing box, a sending-out channel is fixed to an inlet and outlet in the outer side of the laser processing box, and compared with the prior art, the grinding box communicates with the laser processing box through the connecting channel, and an extending-out plate and a containing plate for clamping plates are arranged in the connecting channel and the sending-out channel; the clamping distance suitable for plates can be adjusted through the conveying assembly, the plates are driven to be intermittently fed into the grinding box and the laser machining box in a clamping traction mode, air in the laser machining box is pumped out in cooperation with the air storage cylinder, the relative vacuum environment is kept, the effect of laser deep penetration welding is prevented from being affected, assembly line machining is achieved, and efficiency is higher.

The invention discloses a copper-chromium contact with high fusion welding resistance and a preparation method thereof, and belongs to the technical field of contact materials. The preparation method comprises the steps that high-purity electrolytic chromium powder and electrolytic copper powder serve as raw materials, after acoustic resonance powder mixing is conducted, powder upsetting and cold isostatic pressing are conducted in sequence, and a green body is obtained; carrying out gradient sintering and finish machining treatment on the green body to obtain a copper-chromium electrode bar; the copper-chromium electrode bar is subjected to atomization powder making, and copper-chromium alloy powder is obtained; after the copper-chromium alloy powder is sequentially subjected to sheathing, heat treatment, seal welding and hot isostatic pressing sintering, a sheath is removed, and a prefabricated body is obtained; and after the prefabricated body is processed, the surface is remelted by green laser, and the copper-chromium contact with high welding resistance is prepared. According to the method, by improving the purity of the copper-chromium contact and optimizing the morphology and distribution of the chromium particles, the prepared contact is high in purity, the chromium particles are fine and uniform in distribution, the welding resistance and the breaking performance are excellent, and the method is suitable for a high-voltage-grade arc extinguish chamber.

The utility model provides a battery packaging structure and a battery, the battery packaging structure comprises a shell and a cover plate, the contact surface between the shell and the cover plate is an inclined surface, and the inclined surface and the shell form a certain inclination angle, so that during laser welding, the laser welding angle and the shell also form a certain inclination angle, the incident path of a laser beam and the shell form a certain inclination angle, and the laser welding efficiency is improved. Therefore, the incident path and the reflection path of the laser beam are not perpendicular to the shell any more, reflection of the laser beam is greatly reduced, meanwhile, the reflected laser beam cannot be reflected along the incident path, the laser lens cannot be damaged, and the service life of the laser lens is prolonged. The shell and the cover plate are fixed by welding and form the fusion welding structure, and the fusion welding structure extends along the inclined direction of the contact surface, so that the fusion welding structure at least partially covers the contact surface, the stable welding of the shell and the cover plate is ensured, and the structural stability and rigidity of the battery packaging structure are improved.

The invention provides a friction solid-phase additive manufacturing method for improving the bonding strength of dissimilar alloys through interlayer interface texturing. The method comprises the following steps that an aluminum alloy or magnesium alloy plate serves as a base body; depositing a first metal layer on the polished to-be-added area by adopting a friction solid-phase additive process; processing a preset micron-sized three-dimensional texture on the surface of the first metal layer by adopting a laser scanning system so as to form a textured interface, and meanwhile, removing new oxides on the surface of the first metal layer; on the textured interface, a second metal layer which is made of a material different from that of the first metal layer is deposited again through the friction solid-phase additive process, so that a bonding interface which is characterized by micromechanical interlocking is formed between the first metal layer and the second metal layer; layer-by-layer additive manufacturing of a stacked dissimilar alloy having a plurality of dissimilar metal bonding interfaces. According to the method, the interlayer bonding mode of the dissimilar alloy is changed, and the problems of layering and cracking of dissimilar alloy fusion welding additive manufacturing components are effectively solved.

The invention discloses an ultrasonic-annular water cooling synergetic thermosetting composite material repairing method and equipment, on the basis of coaxial annular water cooling, an annular cooling cavity with a variable contour and a structural design of a closed ring with a plane contour which can be circular, elliptical, waist-circular or polygonal are introduced, so that the inner side contour of a cooling ring can be more attached to a welding area. For a large-size or irregularly-shaped thermosetting matrix component repaired by adopting ultrasonic local fusion welding, the cooling zone can be tightly attached to the outline of a welding interface in the circumferential direction through the design, heat is effectively prevented from overflowing along a complex boundary, compared with a fixed circular or linear cooling structure, the range of a heat affected zone can be further narrowed, and the service life of the component is prolonged. And a high-temperature area in the thermosetting matrix is more limited near a welding interface, so that the overall temperature of the thermosetting matrix is always lower than the glass-transition temperature while sufficient melting and flowing of the thermoplastic patch are ensured, and resin degradation and interface strength attenuation caused by local overheating are avoided.

The invention belongs to the technical field of dissimilar metal welding, and particularly relates to a laser welding-brazing method for titanium steel dissimilar metal connection. According to the laser welding-brazing method, the laser is adopted as a welding heat source, and laser welding combining brazing and fusion welding is achieved by comprehensively regulating and controlling the filling material, the laser beam position and welding parameters. By the adoption of the welding mode, metallurgical regulation and control of welding seams can be effectively achieved, generation of brittle intermetallic compounds is restrained, a high-quality welding joint with excellent strength and plasticity is obtained, the tensile strength of the welded joint is 317.6 MPa and reaches 82.71% of that of steel base metal and 75.44% of that of titanium base metal, the joint coefficient is 0.83, equal-strength matching is basically achieved, and the welding quality is improved. The welding problem of the titanium steel dissimilar metal is effectively solved, technical support can be provided for matched use of titanium alloy and traditional steel and iron materials, and development of the transportation tool lightweight technology is further promoted.

The invention discloses a high-strength weldable aluminum alloy cold pressure welding connection and heat treatment method. The method comprises the steps of material preparation, cold pressure welding connection, subsequent heat treatment and the like. According to the method, room-temperature cold-pressing butt welding and overall heat treatment are combined and applied to the 7000-series high-strength weldable aluminum alloy, heat input and component deformation in the connection stage are reduced, the welding coefficient of a connection joint can reach 89%-99%, and the method is remarkably superior to fusion welding and other solid-phase welding methods. And a melting solidification structure is not formed in the joint area, so that the structure state and the mechanical performance of the joint area are closer to those of the base material area through a subsequent process, and good overall consistency can be kept under the scenes of long material splicing, component extension and the like. Meanwhile, the process route has certain combination flexibility, and compared with the process only depending on single fusion welding or friction stir welding, the multiple cold pressure welding and heat treatment combination routes are provided to adapt to wires and bars of different specifications and different production rhythms.

The invention belongs to the technical field of welding, and particularly discloses a solid welding wire fusion repair welding method which comprises the steps that a to-be-fusion repair area is cleaned; the extending length of a tungsten needle on the argon tungsten-arc welding gun is adjusted not to exceed the inner diameter of a nozzle of the argon tungsten-arc welding gun; the height from the tungsten needle to the to-be-repaired area is adjusted to be a preset height, so that the electric arc does not deviate; the fusion repair included angle is adjusted to be within a first preset angle on the two sides of the weld toe included angle bisector; welding toes and plates around the welding toes are molten again through an electric arc, molten metal on the two sides of the welding toes is drained to the middle area through the surface tension of a molten pool after melting, and the surface of the solid welding wire welding seam is made to be smooth. By means of the method, a smooth transition area can be formed on the surface of the weld toe, the effect of stress concentration of the weld toe can be remarkably reduced, the weld bead shape can be finished by replacing a grinding machine with the method of weld toe fusion repair between layers, the incomplete fusion condition is reduced, and therefore the internal quality of the weld is improved.

The invention relates to the technical field of copper alloy contacts, in particular to a method for modifying the surface of a copper-chromium contact by adopting a surface laser remelting technology. Comprising the following steps: S1, carrying out sand blasting treatment on the copper-chromium contact; s2, carrying out laser remelting on the copper-chromium contact subjected to sand blasting treatment; and S3, the copper-chromium contact obtained after laser remelting is placed in magnetic grinding equipment, grinding treatment is conducted for 8-12 min, and the modified copper-chromium contact is obtained. The surface of the copper-chromium contact is modified through the laser remelting technology, refining of chromium phase particles can be effectively promoted, and a continuous and compact fine grain strengthening layer with a certain thickness is constructed on the surface layer of the alloy, so that the voltage resistance strength, the breaking capacity and the fusion welding resistance of the copper-chromium contact are comprehensively enhanced.

The present application relates to the technical field of nuclear fusion device, disclose a kind of welding method of fusion device cooling pipe, wherein, the welding method of fusion device cooling pipe includes the following steps: preparation two cooling pipes to be welded;Welding adapter on the welding surface of one of the cooling pipes, the nickel content of the adapter is higher than the nickel content of the cooling pipe;The radial interior of adapter and the welding surface to be welded of adapter are polished;Two cooling pipes are matched, so that the welding surface of another cooling pipe is connected with the welding surface to be welded of adapter;Self-fusion welding is carried out on the adapter and another cooling pipe.The welding method of fusion device cooling pipe of the embodiment of the present application not only solves the problem of excessive magnetic permeability of the cooling pipe, but also improves the welding quality and welding qualification rate of the cooling pipe.

The invention discloses a glass packaging device and method, and relates to the technical field of glass packaging. The device comprises a sealing cover shell, a conveying mechanism, a vacuumizing mechanism, a welding mechanism and a mechanical arm, a closed environment is formed through the sealing cover shell, the vacuumizing mechanism exhausts internal air, the welding mechanism conducts high-temperature fusion welding on the edge of laminated glass, and the mechanical arm clamps a pressure clamp to maintain the attaching state of the glass after welding. According to the method, the processes of feeding, vacuumizing, welding, pressurizing, annealing and discharging are executed by adopting the device. According to the scheme, oxidation pollution in the welding process is effectively reduced through a fully-closed environment and automatic control, the sealing strength and airtightness are improved, the packaging quality stability is guaranteed, and the method is suitable for the field of manufacturing of high-end photoelectric and vacuum devices.

The invention belongs to the technical field of fusion connection of a thermoplastic composite material and a metal laminated structure, and discloses a laser fusion temperature and pressure coordinated control process method for the thermoplastic composite material and the metal laminated structure. According to the method, follow-up pressing force application and temperature control in the laser connection process are achieved, follow-up pressing force application is achieved through clamping mechanisms designed at the two ends of a laser welding actuator respectively, and the contact portion of the clamping mechanism on one side and a workpiece is in a single-roller pre-clamping mode; and the contact part of the clamping mechanism on the other side and the workpiece adopts a multi-pressing-roller pressing and pressure maintaining mode. According to the temperature control function, the temperature of a connection interface is fed back in real time through an infrared online sensing system, then the output power of a laser heating head is changed in a self-adaptive mode to dynamically regulate and control energy irradiated on the metal surface, and finally control over the interface temperature of the laminated structure is achieved. According to the method, the problems of poor connection quality and the like caused by poor temperature consistency of connection areas and different pressing forces are solved, and the interface connection effect of the thermoplastic composite and the metal laminated structure is effectively improved.

The invention discloses a fail-safe automatic unhooking charging system for a battery charging grid, which relates to the technical field of battery charging and comprises a charging state detection module, a fault contact subdivision module, a controlled current reduction selection module and a mechanical unhooking execution module. The charging state detection module collects multi-dimensional charging state parameters, and when the parameters exceed a threshold value, it is judged that a suspected fusion welding fault exists, and a suspected polarity set is generated; the fault contact subdivision module multiplexes an acquisition link to obtain a contact arc correlation signal and a temperature change rate, and judges a single-pole or double-pole fusion welding type; the controlled current reduction selection module calculates a current reduction coefficient and a target near-zero current according to the fault type, and executes hierarchical controlled current reduction; the mechanical unhooking execution module executes an unhooking action, verifies a result through an auxiliary contact and an electrical parameter, and triggers secondary isolation when the result fails; according to the invention, the problem of unhooking failure caused by contact fusion welding is effectively solved, and the system safety is improved.

The present invention relates to methods for connecting polymer films made of thermoplastic materials (including foil-laminated and metallized films) and makes it possible to connect such bodies by fusion welding. The present method for manufacturing a large-width film covering makes it possible to obtain a finished product having a width of up to 36 metres, depending on requirements. The method also makes it possible to produce a good-quality and even longitudinal seam over the entire length of a roll of material (up to 100 running metres).

The invention discloses a method for welding zirconium alloy through combination of thermal hydrogen treatment and vacuum thermal compression, and belongs to the technical field of materials and welding. The problem that the zirconium alloy is prone to plastic attenuation in the fusion welding and high-temperature diffusion bonding processes is solved. According to the method, the to-be-welded zirconium alloy element is firstly subjected to thermal hydrogen treatment, hydrogen can reduce the phase transition temperature of the zirconium alloy, then the zirconium alloy is subjected to vacuum hot pressing in the diffusion bonding process, large-scale recrystallization and recrystallization occur in the zirconium alloy under the combined action of temperature and pressure, and crystal grains are refined to a certain extent. And meanwhile, the zirconium alloy subjected to thermal hydrogen treatment can release a large amount of hydrogen, and hydrogen embrittlement of the zirconium alloy is avoided. The vacuum hot pressing process also enables the zirconium alloy to generate work hardening so as to further improve the strength of the zirconium alloy. The welding rate of a zirconium alloy element connector obtained through welding reaches 100%, the shear strength of the connector can reach 450 MPa or above, and the shear elongation reaches 29%.

The invention discloses IGBT module packaging equipment based on fusion welding and a bubble control method, and relates to the technical field of IGBT machining, the IGBT module packaging equipment comprises a dispensing assembly mounted on a machine body, the machine body is connected with a mounting cover, a guide plate is rotatably connected in the mounting cover, the machine body is provided with an upper limiting plate, and a side limiting plate is slidably connected with a supporting rod; the device has the advantages that the side faces of the IGBT module are limited through the two side limiting plates, the upper surface of the IGBT module can be limited through the arrangement of the upper limiting plate, the IGBT module before entering the dispensing assembly is limited, the phenomenon that the IGBT module turns over and inclines before entering the working range of the dispensing assembly, and then dispensing fails can be prevented, and the working efficiency of the dispensing assembly is improved. And the angle of the guide plate is changed, the direction of hot air sprayed out of the air outlet pipe is changed, the phenomenon of unsoldering caused by local uneven heating and local excessive heating is avoided, and the reliability of the device is improved.

The invention discloses an anti-rebound strong-breaking high-voltage direct-current relay, and the relay comprises a static assembly which is disposed in a relay housing, is used for forming a static conductive and magnetic circuit foundation of the relay, provides a second section of counterforce in the pull-in process of the relay, inhibits the pull-in rebound of a contact, and assists in enhancing the breaking force during breaking. And the movable assembly is arranged in the relay shell and is used for realizing dynamic on-off actions of the contacts. According to the invention, the three-section counter-force design is optimized and combined with the tower-shaped spring, so that the collision energy and bounce of the movable contact can be reduced, the arc generation and the component loss are reduced, and the bonding risk is reduced; breaking force is provided through the synergistic effect of the main spring, the counter-force spring and the magnetic steel, the contact can be assisted to be rapidly separated, and therefore fusion welding is overcome, arc extinguishing is accelerated, and contact damage is reduced. Through the magnetic steel directional polarity and closed magnetic circuit design, the magnetic field intensity can be enhanced, the pull-in response time can be shortened, and the magnetic leakage can be reduced, so that the pull-in force and the holding force can be enhanced, and the contact looseness can be avoided.

The medium-thickness plate aluminum alloy composite welding system comprises a stirring head and a double-wire welding gun, the stirring head is arranged on a special machine and is driven by the special machine to move in the welding direction, and the double-wire welding gun is arranged at the tail end of a robot in the using state and is driven by the robot to move in the welding direction during welding. The stirring head is arranged in the front and used for conducting friction stir welding on the splicing position of the two medium-thickness aluminum alloy plates, and the double-wire welding gun is arranged in the rear and used for conducting covering welding on indentations left by welding of the stirring head on the two medium-thickness aluminum alloy plates. The friction stir welding process is firstly adopted, the problems of fusion welding air holes and fast heat conduction of materials are solved, the welding efficiency is high, beveling before welding is not needed, welding materials and protective gas are saved, then double-wire arc welding is adopted for fast cosmetic welding, the problem that friction stir welding seams are slightly lower than base metal is solved, the cosmetic welding seams are thin, most bubbles can directly overflow, and the welding efficiency is high. And air holes are avoided.

The invention provides a silver-nickel-titanium electric contact material and a preparation method thereof. By adopting a nickel-titanium alloy material as a main additive, the welding resistance of the electric contact material is improved while the good machinability of the material is maintained. NiTi is introduced as a main additive to be added into an Ag matrix to improve the fusion welding resistance of the material, meanwhile, a small amount of trace copper is also added to mainly improve the wettability of the material, and the C powder and the titanium carbide powder improve the fusion welding resistance of the material. In addition, a powder metallurgy process is adopted, material proportion is easy to control, process flow is short, and cost is low. The rapid plasma electric spark sintering speed is high, the time is short, and the material density is high.

The invention relates to the technical field of high-voltage electric appliance switch equipment, and discloses a high-safety vacuum circuit breaker for power distribution control equipment, which comprises a vacuum circuit breaker body and a movable frame for bearing the vacuum circuit breaker body, the vacuum circuit breaker body comprises a solid-sealed polar pole main body, the solid-sealed polar pole main body is provided with an upper transverse outlet and a lower transverse outlet, and plum blossom contacts are arranged at the transverse outlets; a vacuum tank and an inner sealing cylinder positioned below the vacuum tank are packaged in the solid-sealed polar pole main body; an insulating transmission sleeve is arranged in the inner sealing cylinder, and an insulating transmission rod inner core is movably arranged in an inner cavity of the insulating transmission sleeve in a penetrating mode. The wax type temperature sensing bulb is arranged in the conductive arm base, the kick type diaphragm is used as a trigger medium, a direct linkage relation between the contact temperature and mechanical locking is established, contact fusion welding, arcing or explosion accidents caused by forced switching-out are effectively prevented, and the operation and maintenance safety of power distribution equipment is improved.

The invention discloses a silver-saving type AgSnO2In2O3 contact material and a preparation method of the silver-saving type AgSnO2In2O3 contact material, and belongs to the technical field of silver-based contact materials. The preparation method of the contact material comprises the following steps: firstly, performing high-energy ball milling on specially prepared ITO conductive ceramic powder and ATO conductive ceramic powder according to the mass ratio of 1: 1 to obtain ITO. ATO composite conductive ceramic powder, and performing ball milling on the obtained ITO. ATO composite conductive ceramic powder and AgSnCu alloy powder according to the mass ratio of 100: 12-100: 16; and carrying out isostatic compaction, oxidation, sintering and extrusion on the obtained AgSnO2In2O3 composite powder containing the composite conductive ceramic reinforced phase to obtain the AgSnO2In2O3 composite powder containing the composite conductive ceramic reinforced phase. The contact material prepared according to the method is low in resistivity and high in welding resistance, and the purpose of saving silver can be achieved.