23 results about "Metal transfer" patented technology

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 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 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.

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.

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.

The invention relates to a steelmaking method comprising the following successive steps: − producing hot metal in a blast furnace, the content in sulfur of said hot metal being below 500 ppm in weight, − tapping said hot metal in a vessel and submitting it to a first desulfurization step by adding desulfurization agents and creating a slag layer to which part of said sulfur is transferred to reach a content of sulfur below 50 ppm in weight in the hot metal, − removing said slag and transferring the hot metal into a BOF and submitting it to a first decarburization step, − tapping the resulting liquid steel into a ladle and submitting it to a second decarburization step, − performing an alloying step, − performing a second desulfurization step, − proceeding to an optional final alloying step using ferro-alloys containing less than 300 ppm in weight of titanium, to obtain a liquid steel having a sulfur content below 30 ppm in weight, a titanium content below 100 ppm in weight and a carbon content below 50 ppm in weight, − casting said liquid steel.

The application belongs to the technical field of manufacturing of wind power gear box and its shaft, and particularly relates to a process for preparing an integrated shaft by cold metal transfer cladding. The preparation of the integrated shaft comprises the following steps: step S1: cleaning the surface of the shaft to remove oxides and oil stains; step S2: using a cold metal transfer surfacing process to cladding a transition layer alloy on the surface of the shaft; step S3: processing and detecting the transition layer to ensure that the surface meets the preset flatness and geometric accuracy, and is free of cracks, un-fused or hole defects; step S4: using a cold metal transfer surfacing process to cladding a wear-resistant layer alloy on the transition layer; and step S5: processing and detecting the wear-resistant layer to ensure that the surface is free of cracks, un-fused or hole defects, and meets the design roughness requirement. The process can be used to prepare a planetary shaft of a wind power gear box, significantly improving performance and reducing cost.

The titled invention "A method of functionally grading marine risers externally with a method of manufacturing thereof discloses a method of manufacturing a marine riser (103) having (501) external functionally graded material (FGM) layers. Marine riser (103) is functionally graded using a cold metal transfer torch (204) and rotating welding positioner (205) by wire arc additive manufacturing. The weld torch is integrated to a linear feed system which is numerically controlled. The rotating welding positioner (205) rotation is combined with the weld torch integrated linear feed system for the functionally grading process along the external surface. The proposed method of functionally grading can achieve functional layers both along the internal and external layers to mitigate internal and external corrosion. The proposed method of functionally grading can achieve functional layers along the external layers.

This application relates to the field of aluminum welding technology, and particularly to a method for seamless welding of aluminum art components. This method employs a cold metal transfer welding process, including: obtaining the plate thickness, welding wire diameter, and wire feed speed of the aluminum art component; determining the reference short-circuit current rise rate based on the welding wire diameter, and then compensating for it based on the plate thickness and wire feed speed to obtain the target short-circuit current rise rate; setting the short-circuit current rise rate of the cold metal transfer welding machine as the target value; real-time detection of the current rise waveform during the short-circuit phase during arc initiation welding, and calculation of the actual short-circuit current rise rate; when the deviation between the actual value and the target value exceeds a preset threshold, adjusting the welding machine power output to bring the deviation of subsequent short-circuit cycles back within the threshold; and linearly reducing the actual short-circuit current rise rate during the arc termination phase until the arc is extinguished. This application, through feedforward compensation, real-time feedback adjustment, and linear arc termination speed reduction, ensures that the molten droplet transfer is within a spatter-free window, achieving a seamless weld on the aluminum art component.

This utility model discloses a metal tempering device for uniform heating, including a support platform. A fan is fixedly connected to the upper left side of the support platform, and a tempering mechanism is arranged on the upper left side of the support platform. Support frames are fixedly connected to the upper left and right sides of the support platform, and a traction mechanism is arranged above the support frames. The tempering mechanism includes a heating tube for uniformly heating the metal and a support frame for supporting the metal. The traction mechanism includes a hook for hoisting the metal and a sliding block for moving the hook. The tempering mechanism includes an outer frame, an inner frame fixedly connected inside the outer frame, and a heating tube fixedly connected to the outside of the inner frame. With this structure, the metal to be tempered can be heated uniformly; large metal pieces can be transferred into the device more quickly, improving work efficiency.

The present application relates to the technical field of composite welding, and discloses a composite welding method for titanium-aluminum composite plates, in which two titanium-aluminum composite plates to be welded are arranged in butt joint, cold metal transfer welding technology is used to weld the titanium side base plate, and friction stir welding technology is used to weld the aluminum side base plate, wherein, in the welding process, cold metal transfer arc is used as a heat source and the stirring head of the friction stir welding machine is used to generate heat respectively. The present application uses cold metal transfer welding and friction stir welding to perform butt joint welding on the titanium-aluminum composite plate, and the welding process is stable, the shape is good, and the quality is high. While performing butt joint welding on the titanium-aluminum composite plate, the intermetallic compound generated when welding the titanium side can be broken by the stirring action of the stirring head of the friction stir welding, so as to effectively improve the interface bonding strength of the butt joint welding of the composite plate.

The present application relates to a molten iron tank car, a molten iron transfer transportation system and an automatic slag unloading method. The molten iron tank car comprises a base, a molten iron container and a molten slag container arranged on the base; the bottom wall of the molten slag container comprises an openable movable wall panel, and when the movable wall panel is in an open state, a slag unloading passage is formed between the molten slag container and the space below the molten iron tank car. The molten iron transfer transportation system comprises a transfer track, a slag unloading station and the molten iron tank car; the transfer track is connected between an iron smelting position and a steel smelting position, the molten iron tank car is arranged on the transfer track and can move between the iron smelting position and the steel smelting position along the transfer track; the slag unloading station comprises a slag pool, and the slag pool is arranged at a first specified position on the transfer track; when the molten iron tank car stops at the first specified position, the slag pool is located below the molten slag container. When the molten slag in the molten slag container is unloaded, the molten iron tank car only needs to stop at the first specified position once, and the slag unloading passage is opened.