38 results about "Metal transfer" patented technology

The present invention relates to an aluminum alloy welding material and a method for preparing a high-strength and tough weld, belonging to the field of welding technology. The aluminum alloy welding material of the present invention combines welding technologies such as cold metal transfer and pulse composite welding, laser welding, etc. with rapid cooling, so that elements such as Mg, Cu, and Zn in the weld are completely solid-solved and in a supersaturated state. The joint strength mainly comes from the solid-solution strengthening contribution of alloy elements such as Mg, Cu, and Zn and the precipitation strengthening contribution of the corresponding strengthening phases; then, through short-term natural aging, the solute-vacancy coupling diffusion mechanism can be realized, promoting the rapid precipitation of high-density strengthening phases in the weld, thereby realizing the strengthening and toughening of the weld, and significantly improving the weld strength and welding coefficient. Thus, the intervention of artificial aging is avoided, the welding cost is reduced, and the welding efficiency is improved.

A method for thermo-mechanical synergistic negative-pressure arc cold metal transfer welding or additive manufacturing. The method comprises: performing pre-welding preparation; setting CMT process parameters and adjusting the relative position of a welding gun; configuring a CMT power supply and turning on a shielding gas; on the basis of a CMT current waveform and a transfer state of molten droplets (4), controlling and applying an adaptive negative-pressure arc suction force; and completing a thermo-mechanical synergistic negative-pressure arc cold metal transfer welding or additive manufacturing process. By means of the above-described steps, a suitable negative-pressure arc suction force resistant to an impact force and gravity is accurately applied during a molten-droplet transfer process, so as to reduce droplet spatter from a conventional positive-pressure arc (3) and reduce the impact of molten droplets on a molten pool (5), thereby making the molten droplets enter the molten pool more smoothly with lower heat input, achieving a thermo-mechanical synergistic behavior of negative-pressure arc cold metal transfer welding or additive manufacturing, and resulting in better forming and property quality of welding or additive manufacturing.

The invention belongs to the technical field of welding equipment, and particularly provides double-station cladding special machine equipment applying cold metal transfer, the double-station cladding special machine equipment comprises a base and an automatic welding mechanism, the base is provided with at least two cladding stations, and each cladding station comprises a rotary headstock, a bracket and a tailstock; the rotary head frame is arranged at the two ends of the base, the bracket and the tailstock are arranged on the base in a sliding mode, and the bracket is located between the tailstock and the rotary head frame. A cross beam is arranged on the base, the cross beam is arranged in the length direction of the base and penetrates through the two cladding stations, and the automatic welding mechanism is arranged on the cross beam in a sliding mode. According to the double-cladding station, the downtime of equipment is shortened, the production efficiency is improved, only two degrees of freedom of movement of the automatic welding mechanism are achieved, programming is very easy, a technologist and an operator can also avoid excessive time consumption and errors, and the technical problems are solved.

The present invention belongs to the technical field of metal separation devices, and discloses a metal separation device for construction waste treatment, including a treatment box. A crushing mechanism and a plurality of metal separation mechanisms located below the crushing mechanism are arranged inside the treatment box; through grooves penetrating through are uniformly formed on the outer wall of the treatment box, and every two adjacent through grooves form a group and are correspondingly arranged with the metal separation mechanisms; the metal separation mechanism includes an upper ring plate and a lower ring plate both horizontally and fixedly arranged in the through grooves of the same group, an annular sleeve rotatably arranged between the upper ring plate and the lower ring plate, a semi-circular magnetic ring located inside the annular sleeve and fixedly arranged with the upper ring plate, and a driving component for driving the annular sleeve to rotate; in the present invention, through the arranged metal separation mechanism, the magnetically adsorbable metals in the treatment box can be continuously transferred to the outside of the treatment box through the annular sleeve, and there is no idle period, so the separation effect on metals is good.

The invention relates to a process for forming an Mg-9. 2Gd-3.2 Y-2Zn-0.4 Zr alloy by utilizing a hammering auxiliary cold metal transition additive manufacturing technology, and belongs to the field of metal material process forming. The process comprises the following steps of substrate preheating, electric arc additive forming and weld bead hammering. According to the process, the Mg-9. 2Gd-3.2 Y-2Zn-0.4 Zr wt% alloy which is fine and uniform in structure and low in residual stress is prepared through CMT electric arc welding equipment, hammering equipment and substrate preheating equipment, and the Mg-9. 2Gd-3.2 Y-2Zn-0.4 Zr wt% alloy is used for improving the mechanical property of a formed part, prolonging the fatigue life of the part, reducing internal defects of the formed part, reducing the residual stress of the formed part and widening the application range of the heavy rare earth magnesium alloy.

The invention discloses a double laser-electric arc composite additive manufacturing method for a heat-resistant rare earth magnesium alloy structural part, and aims to solve the problem of'size bimodal distribution 'of an eutectic phase caused by cooling rate difference during high-speed electric arc additive manufacturing of a rare earth magnesium alloy. A dual-wavelength laser beam which is coaxially integrated and has synergistic functions is creatively compounded with a cold metal transition electric arc. Wherein the straight-out blue laser is used for carrying out wide-area pre-melting on a processing area, so that the reflection loss of subsequent red laser is reduced, the stirring effect of the red laser is improved, and element burning loss is inhibited; and the coaxial oscillation type red laser performs high-frequency stirring on the arc molten pool. Through the synergistic effect of the blue light laser stabilizing thermal gradient and the red light laser homogenizing solute field in the molten pool, the problem that the eutectic phase size difference between the interlayer remelting area and the single-layer center area is large is effectively solved, the eutectic phase in the structural part is evenly and dispersively distributed on the whole, and the mechanical property uniformity of the structural part at the room temperature and the high temperature is remarkably improved.

The invention relates to a cold metal transition electric arc additive manufacturing process matched with a 5R59 aluminum scandium welding wire, and belongs to the technical field of electric arc additive manufacturing. The method is characterized in that a 7A52 aluminum alloy is used as a substrate, a 5R59 aluminum scandium welding wire is used as a wire material, parameters are set on a CMT welding power source, and a reciprocating scanning forming path is adopted; protective gas is adopted for protection, the first three layers are added in a large-current decreasing mode, and when the first three layers are arranged on the third layer, normal setting parameters are returned to stabilize material adding; and after each layer of additive material is finished, the welding gun is lifted upwards by 1.5-3 mm, after the welding gun stays for 80-100 s, welding of the next layer continues to be conducted on the basis that the additive material layer is finished, and so on until the additive material part is manufactured. The method has the advantages that the additive part is good in formability and mechanical property, energy-saving, low in cost, good in appearance forming, tight in layer-to-layer combination and high in controllability. The mechanical property of an additive manufacturing structural part based on the process is outstanding, the tensile strength Rm is larger than or equal to 400 MPa, the yield strength Rp0.2 is larger than or equal to 200 MPa, and the ductility A is larger than or equal to 20%.

The utility model provides an adjustable composite welding machine nozzle which comprises a first nozzle, a diameter expanding component used for expanding the diameter of the nozzle is arranged at the left end of the first nozzle, an anti-blocking component used for cleaning welding slag is arranged in the first nozzle, and a contact tube is arranged in the anti-blocking component. Compared with the prior art, the device has the advantages that by arranging the diameter expanding component and adjusting the diameter of the nozzle, a welding worker can optimize the shape of a molten pool and a metal transfer mode to meet the welding requirements of specific materials and thicknesses, and therefore welding defects such as air holes, cracks and poor permeation are reduced; the adjustability of the nozzle provides higher flexibility for the welding process, an operator can quickly adjust welding parameters according to different workpieces and process requirements, the working efficiency and the operation adaptability are improved, in addition, an anti-blocking component is arranged to ensure that the flow of gas is always kept at a preset level, and the stability of the welding process is ensured.

The invention provides a friction stir welding method for aluminum-magnesium dissimilar alloy, which relates to the technical field of welding and comprises the following steps: step 1) placing a metal transfer layer between an aluminum alloy part and a magnesium alloy part; wherein the aluminum alloy part and the metal transfer layer form a first to-be-welded area, and a second to-be-welded area is formed between the magnesium alloy part and the metal transfer layer; (2) friction stir welding is conducted on the first to-be-welded area, so that the aluminum alloy part and the metal transfer layer are metallurgically bonded; and the second to-be-welded area is subjected to friction stir welding, so that the magnesium alloy part and the metal transfer layer are metallurgically bonded. According to the method, the metal transfer layer is added between the aluminum alloy part and the magnesium alloy part, the metal transfer layer is welded to the aluminum alloy part and the magnesium alloy part through double-pass friction stir welding, and intermetallic compounds are formed on the two interfaces of the aluminum alloy part-metal transfer layer and the metal transfer layer-magnesium alloy part respectively; and therefore, metallurgical connection is realized in the aluminum-magnesium dissimilar alloy joint.

The present invention relates to a molten iron transfer and conveying device, comprising a transfer trolley, a molten iron ladle, and a lifting mechanism. The lifting mechanism comprises a supporting cantilever, the supporting cantilever can perform lifting actions, a turning mechanism and a molten iron ladle are installed on the supporting cantilever, a driving shaft and a transmission shaft are respectively arranged on both sides of the molten iron ladle, the driving shaft is transmission-connected with the turning mechanism, and a first gear is arranged on the transmission shaft; an inoculant adding mechanism comprises a barrel, a bracket located at the lower side of the barrel, and an automatic material-dispensing mechanism, a discharge port is arranged at the bottom end of the barrel, and a material-dispensing slide plate is connected to the discharge port; the automatic material-dispensing mechanism comprises a rotating disc, a rotating shaft, and a gear assembly, a material-dispensing notch is arranged at the outer edge of the rotating disc, and material can be discharged when the material-dispensing notch corresponds to the discharge port, and the rotating shaft is transmitted to the first gear through the gear assembly, so that the rotating disc rotates when the molten iron ladle is turned forward to dump the molten iron, thereby realizing automatic addition of inoculant during the pouring process of the molten iron ladle by relying on the mechanical structure.

A device includes a molten metal pump and a metal-transfer conduit. A clamp may be used to attach the metal-transfer conduit to the pump. The pump has a pump base including an indentation configured to receive the metal-transfer conduit and align the pump outlet with the transfer inlet. The pump outlet may be formed in the indentation and preferably near the center of the indentation in order to better align with the transfer inlet. As the pump operates it moves molten metal through a pump outlet that is in communication with a transfer inlet in the metal-transfer conduit. The molten metal enters the transfer inlet, moves upwards in a passage in the metal-transfer conduit, and out of a transfer outlet.

The invention discloses an electric arc additive manufacturing method for improving the strength of high-strength steel, which comprises the following steps of: 1, selecting a welding wire and a base body, polishing the surface of the selected base body by adopting a grinding machine, completely removing pollutants and an oxidation film, and increasing the preheating temperature to 100-200 DEG C by adopting a resistance heating module; 2, the base body is placed on a working platform, a forming process is set through a cold metal transition welding machine, after forming parameters are set, process debugging is conducted, and final process parameters are determined; and 3, a robot or other movement mechanisms are adopted to drive a welding gun to conduct printing on the surface of the base body according to the programming path, and the whole formed part is printed. The invention aims to provide an electric arc additive manufacturing method for improving the strength of high-strength steel. The technical problem of oxide inclusion in the electric arc additive manufacturing process in the prior art is solved.

The invention provides a preparation method of an electric arc additive of a 7-series aluminum alloy. A 7-series aluminum alloy electric arc additive manufacturing method comprises the steps that after overall modeling is conducted on a component, layered slicing is conducted, and a forming track is planned; cleaning the surface of the substrate; arc additive manufacturing is conducted in a cold metal transition mode, the current ranges from 80 A to 90 A, the voltage ranges from 9 V to 10 V, the wire feeding speed ranges from 5.5 m / min to 6.5 m / min, and adopted protective gas comprises, by volume fraction, 40-50 parts of Ar and 50-60 parts of He; after printing is completed, solid solution heat treatment is carried out, and then water quenching is carried out immediately; and the quenched component is subjected to aging heat treatment. According to the electric arc additive manufacturing process, variable polarity cold metal transition electric arc additive manufacturing is adopted, the 7-series aluminum alloy wires with low Ti, Zr and Sc contents and process parameters with low heat input quantity are selected, no auxiliary device needs to be additionally arranged, and the high-quality aluminum alloy component is obtained.

The utility model relates to the technical field of hot metal transfer, concretely to a hot metal transfer device for cast iron pot production, including transfer car, the top fixed connection of transfer car has two support frames, the top rotationally connected of two support frames has hot metal tank. Advantageous effect is: through two motor drive screw rod rotation and movable block do screw thread movement, movable block moves along the limit sliding rail, through movable block drive connecting rod pull fixed link, through fixed link drive L shape pull member pull top cover main part rotates downward on support frame, until four hole block and two pour mouth bottom are pasted, realize the quick plugging of protective cover to hot metal tank top opening, avoid the iron water spatter in hot metal tank, simultaneously through connecting rod drive fixed block movement, make the limit block insert into the inside of card slot, realize the limit of limit block rotation, avoid the danger that hot metal tank rotates and empties in the transportation.

The invention relates to the technical field of automobile body manufacturing, and discloses an automobile steel plate cold metal transition welding deformation control method and system.The method comprises the steps that a rear gutter channel is structurally enhanced, the plate thickness is set to range from 1.2 mm to 1.5 mm, and a local reinforcing structure is arranged in an area close to a welding bead to improve the section modulus; planning a segmented intermittent welding path comprising a single-segment welding seam and a non-welding interval to disperse heat input; a conformal T2 red copper heat dissipation block integrated with a circulating cooling flow channel is configured, and a low-thermal-resistance forced heat dissipation channel is established through mechanical pressing; and executing the assembly sequence of preferentially welding the side body sub-assemblies and strictly controlling the pre-welding fitting degree. Through the synergistic effect of structural rigidity enhancement, thermal stress discretization, forced heat dredging and assembly stress decoupling, the peak temperature of a welding seam area is remarkably reduced, stress accumulation is blocked, thin plate welding deformation is effectively restrained, and the size precision of a vehicle body is improved.

This invention discloses a method for preparing a core-shell structured heterogeneous aluminum alloy rod. The method includes the following steps: selecting two aluminum alloy substrates that do not undergo physicochemical reactions, wherein one substrate has higher strength and lower plasticity, and the other substrate has lower strength and higher plasticity; using a cold metal transfer technique, spirally welding dissimilar aluminum alloy shells onto the surface of the core rod to obtain a core-shell structured composite rod blank; and subjecting the composite rod blank to room temperature rotary forging plastic deformation to achieve synergistic plastic deformation of the core, shell, and interface. This invention utilizes the multi-directional compressive stress during rotary forging to effectively close interface defects and drive element interdiffusion, transforming the interface from mechanical bonding to metallurgical bonding, ultimately obtaining a core-shell structured heterogeneous aluminum alloy rod with both high strength and good plasticity.

A method of controlling a pulsed welding process, in which an electrode tip of a consumable electrode is advanced toward a workpiece, comprises: generating a pulsed current waveform having repetitive cycles; supplying the pulsed current waveform to the electrode tip to strike an arc on the workpiece during each cycle, wherein a cycle of the repetitive cycles includes: a pulse forming period that includes a forming pulse to form a droplet at the electrode tip, wherein the forming pulse includes a first peak that has a first peak duration; and a pulse detachment period that includes a detachment pulse separated from the forming pulse and configured to transfer the droplet from the electrode tip to the workpiece, wherein the detachment pulse includes a second peak that has a second peak duration that is less than the first peak duration.

A hot metal transfer system and a transfer method, wherein the hot metal transfer system includes a ladle transfer trolley (20) running between a casting liquid distribution station and a pouring station. A moving bracket (21) and a spheroidizing agent conveyor (22) are provided on the ladle transfer trolley (20). The spheroidizing agent conveyor (22) is installed on the moving bracket (21) and approaches or moves away from the ladle (30) through the moving bracket (21). During the process of the ladle transfer trolley (20) transferring the ladle (30), or during the time after the ladle transfer trolley (20) transfers the ladle (30) to the pouring station and before starting to pour the ductile iron hot metal raw material, the ductile iron hot metal raw material in the ladle (30) is spheroidized through the movement and conveying operations of the moving bracket (21) and the spheroidizing agent conveyor (22). The range of spheroidizing timing is broadened, the operation is simple, the control is flexible, the spheroidizing effect is good, and the applicable range is wide.

The invention belongs to the technical field of additive manufacturing process control, and particularly relates to an electric arc additive manufacturing method and device integrating a cold metal transition welding process, multi-sensor online monitoring and intelligent path planning. According to the method, in the CMT electric arc additive manufacturing process, multi-source sensing data of a molten pool area are synchronously collected, the defect risk is predicted in real time based on a hybrid machine learning model, welding parameters are regulated and controlled in a graded mode, meanwhile, macroscopic thermal field management is conducted through regional alternate deposition and a dynamic path adjustment strategy, and the welding quality is improved. And cooperative control of microdefect suppression and macroscopic thermal deformation is realized. The device comprises a CMT welding system, a multi-axis motion platform, a multi-sensing monitoring system and a central control system integrating intelligent path planning, multi-source data fusion and a real-time intelligent control module. The core of the method is that heat input and heat accumulation are accurately controlled through multi-dimensional cooperative intervention, and finally a large complex component is driven to achieve high-precision and high-quality forming.

To provide a method for processing a cold iron source, a method for feeding a cold iron source, and a method for producing molten steel, which can increase a placed amount of the cold iron source in a case where lightweight scrap is used as at least a part of the cold iron source placed in a hot metal transfer vessel.SOLUTION: Provided is a processing method for a cold iron source to be fed into a hot metal transfer vessel 1 before the hot metal is charged. A lightweight scrap having a bulk density of 2.0 t / m3 or less is pressed, and compression molded scrap 3 is formed.SELECTED DRAWING: Figure 1

The invention relates to a heat treatment method of an electric arc fuse wire additive Inconel 718 nickel-based high-temperature alloy. Comprising the following steps that a welding wire is conveyed to a Q235 substrate through cold metal transition (CMT) in an inert atmosphere protection environment, and the Inconel 718 nickel-based high-temperature alloy is manufactured according to a preset path; the alloy is treated for 1 h at the high temperature of 1075-1125 DEG C, then air-cooled to the room temperature, then treated for 8 h at the temperature of 720 DEG C, subjected to furnace cooling to 620 DEG C at the speed of 50 DEG C / h, subjected to heat preservation for 8 h and finally air-cooled. According to the method, a brittle and hard Laves phase formed by segregation of Nb and Mo elements in the deposited alloy is effectively dissolved, sufficient precipitation of strengthening phases gamma'and gamma '' is promoted, meanwhile, coarse grains caused by recrystallization are avoided, and the material obtains ultrahigh strength and certain ductility.

The invention relates to a cladding welding process in which molten material of consumable welding wires (D) is deposited on a surface (O) of a workpiece (W) using a cold metal transfer (CMT) welding process with cyclically alternating arc phases (tLB) and short-circuit phases (tKS), and to a welding torch (SB) and a welding apparatus (SG) for performing such a cladding welding process. According to the invention, at least two consumable welding wires (D1, D2) are used, which are conveyed to the workpiece (W) by means of a common welding torch (SB) having at least two contact tubes (KR1, KR2), each having at least two contact shells (KRT11, KRT21, KRT12, KRT22) movably arranged in a sleeve (H1, H2), said at least two welding wires (D1, D2) being connected to at least one welding power source (SQi).

The invention provides a method for acquiring and analyzing surface topography data of a copper foil for nickel sheet convex hull stamping, which comprises the following steps: acquiring initial geometric parameters and material flow characteristic data of a nickel sheet, and analyzing the bidirectional tensile stress concentration degree of a bottom fillet area through stress distribution when the height of a convex hull is increased to obtain a strain concentration index of the bottom fillet area; according to the strain concentration index of the bottom fillet area, determining fillet radius configuration corresponding to the deformation stage through a genetic algorithm; extracting the metal transfer rate of the flange area from the corrected fillet radius configuration, simulating material flow balance from the flange area to the convex hull area, and determining a predicted value of the thinning degree of the bottom of the convex hull; and according to the optimized punch stroke parameters, the risk that microscopic cracks are generated and expanded along the grain boundary is evaluated, and a dynamic punching control sequence is generated.

A hot metal transfer ladle and method related to hot metal smelting. Ladle comprises a first liquid-level meter and a second liquid-level meter, wherein the liquid-level meters have movable electrode probes, and a lowest liquid level contact position of the electrode probe of the first liquid-level meter corresponds to the highest liquid level in the ladle, and a lowest liquid level contact position of the electrode probe of the second liquid-level meter corresponds to the lowest liquid level in the ladle. The first liquid-level meter and the second liquid-level meter in interlocking control with feeding control valve and a discharging control valve of a control device. An accurate quantification of hot metal feeding or discharging is achieved, and the precision is higher and the efficiency is higher while promoting the automation level of the ladle.

The utility model relates to the technical field of metal transfer equipment, in particular to a metal transfer box which comprises a frame body, two first side plates and two second side plates, the two first side plates and the two second side plates are rotationally connected to the frame body, a first rotating shaft and a second rotating shaft are rotationally connected to the bottom of the frame body, and a first bottom plate is fixedly mounted on the first rotating shaft; a first bottom plate is fixedly installed on the first rotating shaft, a second bottom plate is fixedly installed on the second rotating shaft, when the first bottom plate and the second bottom plate are horizontally arranged, an opening in the lower end of the frame body is blocked, a fixing plate used for fixing the positions of the first bottom plate and the second bottom plate is rotationally connected to the frame body, and a control assembly used for driving the fixing plate to rotate is arranged on the frame body. The fixing plate abuts against the lower surfaces of the first bottom plate and the second bottom plate at the same time. The scrap iron pouring device has the effect of improving the scrap iron pouring speed.

This invention discloses a control system and method for arc additive metal transfer based on local arc voltage sensing. The system includes an arc welding assembly, a substrate, a servo motor, a wire feeding device, a voltage sensor, and a first controller. The arc welding assembly generates an electric arc and acts on the welding wire to form a deposition layer. The voltage sensor has positive and negative terminals, one end of which is connected to the substrate and the other end to the welding wire, for collecting the local arc voltage between the end of the welding wire and the surface of the deposition layer. The voltage sensor output terminal is connected to the first controller. The controller controls the servo motor according to the local arc voltage. The servo motor is connected to the wire feeding device to drive the wire feeding device and adjust the wire feeding height. This invention enables the metal transfer to always operate in a droplet-surface tension combined transfer mode, achieving stable control of the metal transfer process.

The application relates to a preparation method of an electric arc additive manufacturing aluminum magnesium alloy, which comprises the following steps: (1) preparing raw materials, wherein the raw materials comprise the following components and mass percentages: Mg: 5.5-6.1%, Mn: 0.30%-0.50%, Zr: 0.20%-0.30%, Sc: 0.28%-0.35%, Be: 0.001-0.01%, Fe<=0.12%, Si<=0.01%, the balance being Al and impurities composed of inevitable multiple impurity elements, the mass percentage of each impurity element being <=0.05%, and the mass percentage of all the impurity elements being <=0.15%; (2) preparing a deposition body by adopting a variable polarity cold metal transfer electric arc additive manufacturing process; and (3) performing aging treatment on the deposition body, the aging temperature being 330-380 DEG C, and the aging time being 40-150 min, so that the prepared alloy has good corrosion resistance.

The utility model relates to the technical field of continuous sintering furnaces, and discloses an automatic feeding and discharging device of a continuous sintering furnace, which comprises a continuous sintering furnace, a conveyor and a mounting frame. By arranging the continuous sintering furnace, the conveyor, the mounting frame, the mounting mechanism, the driving mechanism, the lifting mechanism, the moving mechanism and the clamping plate, firstly, the moving mechanism is opened, a servo motor drives a threaded plate to move, the threaded plate drives the clamping plate to move, metal is clamped through the clamping plate, and then the lifting mechanism and a hydraulic rod are opened for driving; a hydraulic rod drives a movable plate to move, then a driving mechanism is started, a driving motor rotates, the driving motor drives a left gear to rotate, the left gear drives a mounting plate to rotate, and metal is transferred to the continuous sintering furnace. And certain fatigue is caused by long-time work of workers, so that the metal feeding and discharging efficiency is reduced.