77results about How to "Low heat input" patented technology

The invention belongs to the technical field of welding, and discloses an L-shaped laser-MIG hybrid welding device for a narrow space, and the L-shaped laser-MIG hybrid welding device for the narrow space comprises a welding gun assembly, a laser welding head assembly and a space adjusting assembly. The laser and the electric arc are combined, a laser and electric arc composite heat source is obtained, and the advantages of laser and electric arc composite welding are fully exerted; laser-MIG hybrid welding has the advantages of being high in welding speed, low in heat input, large in equipment clearance tolerance degree and high in welding quality. A welding gun wire feeding route is optimized, the precision of a wire guide assembly is improved, the straightness of a welding wire is guaranteed by combining a three-wheel straightener, and the purpose of stable wire feeding is achieved. The overall connecting piece structure is simplified, the reflecting copper mirror integrating reflection, collimation and focusing is designed, the overall size space is saved, the overall load is reduced, and more functions can be added compared with equipment of the same type under the condition that the load is limited.

The invention discloses a 7-series aluminum alloy composite light source laser welding method, which is characterized in that stitch welding is carried out on double-layer 7-series aluminum alloy test pieces by using a composite light beam formed by a near-infrared laser beam and a blue laser beam, the thickness of the upper-layer 7-series aluminum alloy test piece is 1-2mm, and the thickness of the lower-layer 7-series aluminum alloy test piece is 2mm; before welding, removing an oxide layer on the surface of the aluminum alloy, then pressing up and down through a jig, and setting welding parameters and paths; during welding, light spots of a near-infrared laser beam and a blue laser beam are concentric and emitted at the same time, the two laser beams are coupled and focused to a swing welding head, and stitch welding is carried out according to set welding parameters and paths; the light spot diameter of the blue light laser beam is larger than that of the near-infrared laser beam. Near-infrared light and blue light form coaxial composite light spots and emit light at the same time, stitch welding is conducted on the double-layer aluminum alloy test piece in combination with the swing welding head, and the stitch welding device has the advantages of being high in welding efficiency, good in air hole state and few in splashing and cracks.

The invention discloses a stainless steel laser welding parameter optimization method based on a dynamic annular scanning path. The stainless steel laser welding parameter optimization method comprises the steps that S1, welding parameter setting is initialized to be suitable for controlling welding heat distribution; s2, measuring the material thickness of the welding area of the stainless steel workpiece before welding; s3, the scanning path layer number and the progressive speed are determined according to the welding parameters; s4, the welding control system adjusts welding parameters according to the temperature monitoring data; s5, the laser welding control system adjusts the layer number, the progressive speed and the scanning path radius of the dynamic annular scanning path in real time; s6, the scanning amplitude, the scanning frequency and the welding speed are optimized in real time; and S7, after welding is completed, quality detection is conducted on a welding seam, and detection data are compared with a preset welding quality standard. According to the method, accurate control over welding heat input, remarkable improvement of the welding seam quality and comprehensive optimization of the welding efficiency are achieved.

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing method of an ultrahigh-strength steel-stainless steel interlayer heterogeneous structural part. Comprising the following steps that (1) a model is obtained, and an additive model is designed according to performance requirements needed by a structural part; (2) additive preparation is conducted, specifically, the type and specification of a base plate are selected, mechanical grinding and welding wire filling are conducted on the base plate, an additive path is planned according to the model, and a robot walking program is written; and (3) material adding is started, the optimal technological parameters are matched according to the planned material adding path, and material adding of the structural part is started and completed. The ultrahigh-strength steel-stainless steel heterostructure part obtained through the method has the excellent strength-toughness comprehensive mechanical property, the material adding efficiency is high, the interface of the ultrahigh-strength steel-stainless steel heterostructure part is free of the defects of holes, microcracks, unbonding and the like, and the surface quality is excellent.

The invention provides a narrow gap welding device and method based on molten drop coaxial composite ring laser, and is suitable for high-precision narrow gap welding. The device comprises a welding wire melting system, an annular light beam system, a wire feeding system, a water cooling suite, a molten metal control assembly and a gas pressure system. The welding wire melting system heats a metal welding wire through an induction heating coil to generate molten drop jet flow, and the annular light beam system generates a molten pool. The molten drops vertically drop into a molten pool of the narrow-gap workpiece in a jet flow mode through the molten metal control assembly, and a high-quality welding seam is formed. The control system monitors the size of the gap in real time through the laser contour scanner and adjusts the electronic adjustable nozzle so as to control the size and flow of molten drops. The welding wire is melted through the induction heat source to generate molten drops, the problem of strong coupling between the welding wire and laser is successfully solved, heat input in the welding process is remarkably reduced, and therefore deformation and defects in narrow gap welding are reduced.

The invention discloses an additive preparation method and application of an aluminum-steel composite material. The additive preparation method comprises the following steps: S1, carrying out laser preheating treatment on an aluminum alloy raw material to obtain an aluminum alloy; and S2, aluminum alloy material increase is conducted on the base material steel plate through a friction stir material increase technology, and the aluminum-steel composite material is obtained. According to the method, solid-phase additive materials are combined with various external source auxiliary process technologies, a laser heat source is introduced in the stirring friction additive material process to preheat the aluminum alloy raw materials, the material softening degree can be well improved, the metal fluidity in the additive material process is improved, heat input needed in the additive material process is reduced, and cracks, air holes and other defects are effectively avoided.

A copper-aluminum dissimilar metal laser overlap welding method and system, a copper-aluminum dissimilar metal laser overlap welding system, including a fixture, a high-frequency current system, and a laser welding system; a copper-aluminum dissimilar metal laser overlap welding method, including the following steps: step 1, providing an aluminum plate and a copper plate to be welded, and using a fixture to form an upper and lower overlap joint with the aluminum plate to be welded and the copper plate to be welded; step 2, providing a high-frequency current system; step 3, providing a laser welding system; step 4, starting the high-frequency current system, and the high-frequency current system feeds high-frequency current to the aluminum plate to be welded and the copper plate to be welded respectively; step 5, starting the laser welding system, the laser welding system outputs a focused laser beam to irradiate the aluminum plate to be welded, and the laser welding system blows welding shielding gas to the welding area to implement high-frequency current assisted laser welding; step 6, moving the laser welding head to the end point, closing the high-frequency current system and the laser welding system, and completing the welding process.

The invention belongs to but not limited to the technical field of welding, and particularly relates to a laser-MIG composite welding device and method for a soft gun barrel. Comprising a sectional material, an optical fiber, an interface base, a QP interface, an optical fiber connector transition piece, a main body connecting block, a mounting connecting piece, a copper mirror base, a reflecting copper mirror, an adjustable bolt, a double-layer blocking mirror, a double-layer air knife, a welding wire, a welding gun head, an adjusting connecting block, an angle adjusting piece, an X-axis adjusting sliding block, a Y-axis adjusting sliding block, a steering connecting piece, a Z-axis adjusting sliding block, a soft gun barrel, a wire feeding device and a water and gas path connector. Provided is a welding gun connecting piece. According to the high-power laser-MIG hybrid welding equipment, pipelines are concentrated in the laser head and the welding gun, the problem that interference is prone to occurring in the welding process due to the fact that the pipelines are complex is solved, meanwhile, high-temperature-resistant and high-power optical elements are designed, and the design of the high-power laser-MIG hybrid welding equipment is achieved. The equipment can realize efficient and high-quality welding in a narrow space.

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

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

The invention relates to an argon arc welding seam welding method for a lock bottom butt joint with a thermal barrier coating. The argon arc welding seam welding method comprises the following steps that S1, a welding seam joint is machined, specifically, a first groove is machined in a lock bottom at the mounting edge of the inner wall of a large bent pipe to be welded, a truncated edge is reserved, a second groove is machined in the mounting edge of the outer wall of the large bent pipe, and a truncated edge is reserved; the inner wall of the large elbow pipe and the outer wall of the large elbow pipe are combined, the lock bottom of the inner wall of the large elbow pipe is aligned with the mounting edge of the outer wall of the large elbow pipe, and the gap of the to-be-welded position is smaller than or equal to a first threshold value; s2, first-layer backing welding is carried out, during welding, welding wires are not filled, the truncated edge is directly penetrated in a penetration mode, and the step S3 is carried out after cooling; and S3, second-layer cosmetic welding is conducted, the first groove and the second groove are filled with welding wires, and then welding is conducted. According to the method, the welding quality can be guaranteed, heat input during welding can be obviously reduced, the coating is effectively prevented from falling off, and therefore the service life of the aero-engine large elbow is prolonged.

This invention relates to the field of metal surface strengthening technology, specifically a method for in-situ generation of TiC-TiN ceramic materials using a titanium-containing substrate and an atmosphere-assisted high-energy beam. This method utilizes the titanium-containing substrate itself as a titanium source. Under a specific atmosphere, high-energy beam irradiation causes the Ti element in the substrate to react in-situ with C and N elements in the atmosphere, generating a TiC and / or TiN ceramic strengthening layer on the substrate surface. Specifically, the method includes: pretreating the titanium-containing substrate; placing it in a reaction chamber and introducing an auxiliary gas containing C and / or N; scanning and irradiating the substrate surface with a high-energy beam, controlling process parameters to allow Ti to react with C and N, generating a 0.5-1.2 mm thick metallurgically bonded strengthening layer. The advantages are: this invention eliminates the need for additional titanium powder or carbon powder, resulting in a simple and low-cost process; the strengthened layer exhibits high bonding strength with the substrate with no risk of detachment; and it significantly improves the surface hardness, wear resistance, and corrosion resistance of the substrate, making it widely applicable in military, aerospace, and marine equipment fields.

The present application provides a friction stir welding head with a static shoulder system, which includes a headstock group, a friction stir welding tool holder and a static shoulder assembly. The static shoulder assembly has a tool hole and a shoulder. The tool of the friction stir welding tool holder can be exposed from the tool hole, and the friction stir welding tool holder forms a relative rotation relationship with the static shoulder assembly during friction stirring and solidification, thereby reducing the friction between the shoulder and the workpiece surface and reducing the heat input during friction stir welding.

The invention belongs to the technical field of material additive manufacturing and surface engineering, and particularly relates to a process method for preparing an erosion-resistant layer on the surface of a high-speed pump diffuser runner opening. According to the method, a cold metal transition welding technology is adopted, cobalt-based alloy with high corrosion resistance is selected as a surfacing material and applied to the surface of the high-speed pump diffuser runner opening in a surfacing mode, an erosion-resistant surfacing layer which is free of metallurgical defects and high in hardness is constructed, and therefore the service life of a diffuser is effectively prolonged. According to the technological method, through precise welding parameter regulation and control and scientific selection of materials, the erosion resistance of the surface of the diffuser runner opening of the high-speed pump is remarkably improved, an efficient and reliable surface strengthening solution is provided for the industrial field, and the technological method has important technological innovation value and application prospects.

The invention provides a pumpback static shaft shoulder friction stir welding device. A static shaft shoulder fixing mechanism, a movable shaft shoulder fixing mechanism and a stirring needle transmission mechanism are sequentially arranged from outside to inside in a sleeving mode and are all of a conical structure; the large round end of the static shaft shoulder fixing mechanism is connected with the static end face of the friction stir welding main shaft, and the small round end is connected with the static shaft shoulder body. The large round end of the movable shaft shoulder transmission mechanism is connected with the rotating end face of the friction stir welding main shaft, the small round end of the movable shaft shoulder transmission mechanism is connected with the first end of the movable shaft shoulder body, and the second end of the movable shaft shoulder body is sleeved with the static shaft shoulder body. The large round end of the stirring needle transmission mechanism is connected with the welding main shaft withdrawing shaft, and the stirring needle body is arranged between the small round end and the movable shaft shoulder; the end of the stirring needle body sequentially penetrates through the movable shaft shoulder body and the static shaft shoulder body and is exposed out of the static shaft shoulder body. The welding precision and the welding quality of products with small thicknesses are improved, the production efficiency of the products is improved, and the labor intensity of workers is reduced.

This invention provides a coupled method for thermal cycling control and online cooling to maintain supersaturated solid solution. By integrating multiple online cooling devices and a closed-loop temperature control strategy, it achieves precise management of interlayer temperature, effectively suppressing premature precipitation of Y and O elements during the additive manufacturing process, maintaining a high degree of supersaturation in the matrix, and providing a favorable condition for the formation of ultrafine nano-precipitates in subsequent heat treatment. Simultaneously, the linkage between interlayer temperature window control and process parameter adjustment ensures that each layer experiences a similar thermal history, significantly improving the microstructure consistency along the height direction of the component and eliminating performance gradient differences present in traditional processes. The introduction of a periodic thermal cycling management strategy further releases thermal stress, homogenizes the temperature field, and prevents precipitation coarsening through rapid cooling, thereby improving the overall mechanical properties of the material. This invention provides an efficient, controllable, and reliable process solution for the additive manufacturing of high-performance ODS-RAFM steel.

The present invention relates to the technical field of switch cabinet manufacturing and welding, and in particular provides a switch cabinet welding tool. The switch cabinet welding tool includes a welding displacement component, a mounting platform, an air guide component, two lateral components and a positioning component. The present invention realizes accurate fixed positioning of heterogeneous switch cabinets of various shapes, and can maintain a stable position and posture, thereby improving the accuracy and efficiency of welding, ensuring the welding quality and connection stability, and at the same time, ensuring the stability and tightness of the welding connection, and ensuring that the welding stress uniformly distributed at the connection between the bottom plate and the back plate is provided to prevent the occurrence of problems such as plate deformation, distortion or warping, and applying welding stress, reducing deformation stress, and ensuring the uniformity of the weld. In addition, it provides effective and uniform preheating for subsequent welding, reduces the temperature difference of the welding part during welding, can share heat and stabilize welding deformation, helps to ensure welding quality, and ensures uniform heat input and cooling of welding.

This invention discloses a heat treatment method and apparatus for engine housings. The method includes: performing a temperature test on a welded test ring; clamping the engine housing to be treated onto a transmission support mechanism and adjusting the relative position of the engine housing and the induction coil to ensure that the axis of the engine housing is coaxial with the axis of the induction coil; positioning the circumferential weld to the heating center region of the induction coil; controlling the transmission support mechanism to rotate the engine housing around its own axis and performing local induction tempering treatment on the circumferential weld through the induction coil; after the current circumferential weld has completed local induction tempering treatment, adjusting its position along the axial direction of the engine housing to allow the next circumferential weld to enter the heating center region, and repeating the local induction tempering treatment until each circumferential weld has completed local induction tempering treatment, thereby solving the problem of poor process compatibility between the heat treatment method and the process of thin-walled housings with large aspect ratio in the prior art.

This invention relates to an electron beam welding method for ZL114A / ZL270 dissimilar aluminum alloy materials, belonging to the field of electron beam welding technology. It addresses one of the problems encountered in existing electron beam welding methods for ZL114A / ZL270, namely, the presence of obvious cracks, incomplete fusion, and excessive internal porosity within the weld seam. The electron beam welding method of this invention includes: tack welding of assembled ZL114A and ZL270 alloy test plates; welding using a dual electron beam synchronous welding method with one electron beam preheating the weld seam first, followed by the other electron beam for the final welding; during the final welding process, the center of the electron beam spot is shifted from the butt joint of the test plates towards the ZL270 alloy plate side.

This invention discloses a manual argon arc welding method for sealing welds of containers with metal gaskets, aiming to solve the problems of multiple filler layers, poor welding quality, and slow speed in existing technologies. The method includes butt welding of base materials, attaching a metal gasket to the base material, with a bottom gap of 1-2 mm formed by the butt welding; using tungsten inert gas (TIG) welding to weld the base material and metal gasket together in one pass at both included angles to form the weld seam. During welding, the welding torch current is 180-220 A, the arc length is controlled within 2 mm, the welding speed is 20-22 cm / min, and two weld layers are formed. This invention is suitable for welding butt welds of sealed containers with metal gaskets, achieving the effects of fewer weld layers, high welding quality, and high speed.

The invention provides a high-precision assembly method for a thin-wall weak-rigidity carrier rocket box bottom force transfer structure, which comprises the following steps: S1, processing a scalloped segment product and a thrust flange product in parallel; s2, the scalloped segment and the thrust flange are assembled and welded in a low-stress and compression-free mode; s3, box bottom total longitudinal or circular seam assembly welding is carried out, a friction stir welding process is adopted, and box bottom welding seam phased array detection is carried out after welding; s4, performing box bottom hydraulic airtight test assessment; s5, leveling and aligning the box bottom by using a five-axis gantry mill; s6, thrust flange butt joint faces and butt joint holes are machined in a numerical control mode; s7, performing simulation trial assembly on the butt joint structure, and adjusting interference as required; and step S8, product delivery. According to the high-precision assembly method for the thin-wall weak-rigidity carrier rocket box bottom force transmission structure, precise assembly coordination of a discrete thrust flange structure is achieved, and high-precision coordination assembly of a precise installation structure on the box bottom of a large-diameter weak-rigidity tailor-welded storage box is achieved.

The present application relates to a fish scale welding method and welding machine, belong to fish scale welding technical field, the method includes a plurality of welding cycle, each cycle includes pulse stage and arc breaking stage, the arc breaking stage includes: in response to the last pulse of pulse stage end, the positive wire feeding makes the welding wire into the molten pool; after the welding wire into the molten pool, continue positive wire feeding and continue for the first time; the first time after stopping wire feeding, so that the welding wire stays and keeps contact with the molten pool; the welding wire stays for the second time; the second time after reverse wire drawing makes the welding wire leave the molten pool to carry out the next welding cycle.The present application guarantees the stability of the molten pool through the process of welding wire into the molten pool and keeping, avoids the shock to make the fish scale surface without fine texture; at the same time, the welding wire can also play the role of heat dissipation to the molten pool, to reduce the purpose of heat input. Overall, the fish scale welding is more clear and beautiful, and the welding heat is lower, which is suitable for high appearance requirement welding occasion.

The invention discloses a laser precision cutting and heat affected zone control method and system for a phosphoric acid fuel cell electrode. The method comprises the steps that an original image of the electrode is obtained, an actual alignment mark is recognized, sub-pixel-level centroid coordinates are calculated through geometric moments, coordinate mapping is conducted on a standard cutting path in combination with a two-dimensional affine transformation model, and a corrected cutting path is generated; in the cutting process, a microscopic image of a laser action area is collected in real time, and a thermal damage index is calculated based on the width of a kerf heat affected zone and an edge carbonization mean value; and the control module dynamically adjusts the cooling wind speed through a PID algorithm according to the deviation between the thermal damage index and a preset threshold value, and triggers a secondary suppression strategy for reducing the laser energy when the wind speed reaches the limit. According to the method, path deviation is solved through visual positioning compensation, cooling and laser parameters are cooperatively adjusted through visual thermal field feedback, and the heat accumulation and carbonization phenomena in phosphoric acid fuel cell electrode machining are effectively restrained.

The present invention provides a method for manufacturing a cylinder inner hole by high-speed laser cladding, comprising the following steps: the first part: processing before cladding: the key part is not processing the inner surface of the threaded section, keeping the threaded section consistent with the scraping surface, turning the first chamfer on the left end face of the threaded section to transition to the first step, and then continuing to turn the second chamfer to transition to the scraping surface; the second part: high-speed laser cladding of the inner hole: setting the cladding path to: scraping surface, the second chamfer on the right side of the scraping surface, the first step, the first chamfer, the inner surface of the threaded section, the stop and the chamfer on the right end of the stop to clad one layer; remelting one layer at each chamfer; the third part: finishing after high-speed laser cladding; the fourth part: welding the cylinder bottom. The high-speed laser cladding manufacturing method for the inner hole of the oil cylinder meets the requirements of the inner hole cladding of the oil cylinder, has small deformation and high precision.

The application discloses an aluminum alloy box unequal-thickness butt joint friction stir welding method, which comprises the following steps: process placing of an upper panel of an aluminum alloy box, increasing a friction stir welding arc receiving plate area; cleaning the left panel, the right panel and the upper panel of the aluminum alloy box, adopting mechanical polishing and cleaning; positioning and assembling the left panel, the right panel and the upper panel on a tool, controlling the assembly gap and the misalignment to be not greater than 0.5 mm; setting the parameters of the friction stir welding, and welding the weld joints between the left panel and the upper panel and between the right panel and the upper panel. The aluminum alloy box unequal-thickness butt joint friction stir welding method utilizes the advantages of the friction stir welding to improve the welding deformation, improves the welding quality and improves the production efficiency.

The utility model relates to the field of welding, and discloses a welding device and a welding assembly based on a mechanical arm, and the welding device comprises a wire feeding device used for conveying a welding wire to a position to be welded; the vibration equipment is connected with the wire feeding equipment and is used for driving the welding wire to vibrate; the detection equipment is used for detecting the gap width of the to-be-welded position; and the welding gun equipment is in communication connection with the detection equipment, and the welding gun equipment can work in an arcing state or an arc quenching state and is continuously and repeatedly switched between the arcing state and the arc quenching state under the condition that the width of the gap is larger than a preset critical value. According to the automatic backing welding technical scheme, labor can be saved through automatic backing welding, the quality of welding seams is improved, meanwhile, large-gap and backing-free backing welding forming and efficiency are effectively considered, and the welding operation adaptability to to-be-welded workpieces with different structural sizes and shapes and different application scenes is improved.

The invention relates to the field of welding processing technology of steel, and discloses a composite welding method of an austenitic stainless steel plate, which comprises the following steps: step 1, preparing two plate materials, and processing the end part of each plate material to form a U-shaped groove and an I-shaped groove; secondly, the groove ends of the two plate materials are assembled to form an assembly body, and the I-shaped grooves of the two plate materials are arranged in an attached mode; 3, the assembly is placed in a working chamber, the assembly is heated to a preset temperature, and the working chamber is vacuumized to a preset vacuum degree; fourthly, the assembly is welded through electron beam welding; 5, machining the excess weld metal of an electron beam welding seam, and enabling the transition position of the U-shaped groove and the I-shaped groove to be in smooth transition; and sixthly, filler wire welding is conducted on the U-shaped groove of the assembly. Therefore, the two plates are welded through the welding method combining electron beam welding and wire filling welding, the welding requirement for the plates with the large thickness (such as the plates with the thickness larger than 160 mm) can be met, and the welding efficiency and the welding seam quality are improved.

The invention discloses an aluminum alloy swing laser-vibration-hot wire synergistic efficient additive manufacturing method, and belongs to the technical field of laser fuse wire additive manufacturing. The method comprises the steps that an oxidation film and oil stains on the surface of a substrate are removed; starting the swinging laser-vibration-collaborative material adding equipment, adjusting the angles and positions of a laser device and a wire feeding head, and setting material adding parameters; the base plate is fixed, the robot is programmed, a walking route of the additive heat source is set, and the robot is moved to the initial position; a wire heating device is started to preheat the welding wire; an additive heat source and a protective gas switch are turned on, and additive manufacturing is conducted according to the programming track; after a layer of additive wall is completed, surface oxides of the additive wall are cleaned, the programming track of the robot is reset, and after the additive wall is cooled, the next layer of additive is started; and after manufacturing of the additive wall is completed, the swing laser-vibration-hot wire synergistic additive equipment is shut down. The forming precision of the additive wall can be improved.

The invention relates to a method for operating a magnetic resonance (= "MR") device (10) without a refrigerant, superconductive MR solenoid system (12), said method being characterized by comprising the following steps in order to autonomously charge the superconductive MR solenoid system: (a1) starting a cooling process of the coil system; (a2) starting an automatic current charging program; (b1) measuring a current temperature Tcoil on the coil system and comparing the Tcoil with a first temperature setting value T1ramp which can be specified, from which the coil system is superconductive and is to be charged; (b2) if Tcoil < = T1ramp: supplying a charging current into the coil system and charging the coil system with a current; (c) measuring the current Icoil which is currently flowing in the coil system and comparing the Icoil with a first current setpoint I1target which can be specified at which the coil system produces the desired magnetic field strength; (d) repeating the steps (b1), (b2) and (c) until Icoil is equal to I1target; (e) turning off the supply of current into the coil system (12) and stopping the automatic current charging procedure. As a result, the electromagnetic coil system can be charged autonomously with an electric current.

This invention relates to a composite welding method for Al-Mg-Si-Cu aluminum alloys, belonging to the field of welding technology. The composite welding method of this invention includes the following steps: S1, filling nickel foil between the weld seams formed by two workpieces to be welded, determining the relative positions of a galvanometer laser welding machine and a co-pulse CMT welding machine, with the galvanometer laser preceding the heat source; the co-pulse CMT welding machine uses Al-Si welding wire; S2, determining the welding process parameters for the galvanometer laser and the co-pulse CMT; S3, performing welding using the galvanometer laser-co-pulse CMT composite welding process. By improving welding technology, the alloying composition of the weld metal is optimized during the welding stage; and by synergistically utilizing the two heat sources (galvanometer laser and co-pulse CMT) to ensure good weld formation, the heat input to the heat-affected zone of the weld joint is reduced. This significantly improves the strength of the weld joint under the synergistic control of multiple technologies, effectively alleviating the problem of joint softening.