48 results about "Magnetic pulse welding" patented technology

The utility model belongs to the technical field of electromagnetic pulse welding, and particularly relates to a magnetic pulse welding device based on welding area maximization, a coil is arranged in a base, one surface of the base is used for arranging a flying plate and a supporting block and is provided with a through groove, and the working surface of a welding working area is in a concave arc shape and is arranged towards the through groove; the supporting block is used for supporting a workpiece with curvature, and the fixing structure is used for fixing the flying plate and the workpiece with curvature; during welding, the generatrix of the to-be-welded area of the workpiece with the curvature is parallel to the generatrix of the working face of the welding working area, and the to-be-welded area of the workpiece with the curvature coincides with the working face of the welding working area in the projection direction from the workpiece with the curvature to the welding working area. According to the utility model, the collision point position and the collision angle of the flying plate and the workpiece with curvature can be improved, the effective connection area of the welding area of the flying plate and the workpiece with curvature is increased, the excessive melting of an interface is avoided, and the strength of a welding joint is effectively improved.

The invention discloses preparation equipment and a preparation method of a composite layer sliding bearing, the sliding bearing comprises at least one bearing material layer and a bearing matrix layer, the bearing material layer is connected to the radial outer side of the bearing matrix layer in a wrapping manner, the preparation equipment comprises an electromagnetic pulse welding device, and the electromagnetic pulse welding device can generate a pulsed magnetic field; the electromagnetic Lorentz force acts on the bearing material layer, so that the bearing material layer collides with the bearing base body layer in an accelerated mode under the action of the electromagnetic Lorentz force, and welding connection of the bearing material layer and the bearing base body layer is carried out. According to the preparation equipment, continuous magnetic pulse welding of the bearing material layer and the bearing base body layer can be rapidly and conveniently carried out, so that the preparation cost and difficulty of the sliding bearing are reduced.

This invention discloses a high-performance electromagnetic pulse (EMP) welding process for tubular components, comprising the following steps: configuring a corresponding intermediate layer and drive tube according to the welding process requirements of the target weldment; sequentially assembling the inner tube, intermediate layer, and outer tube; sequentially assembling the drive tube, magnet collector, and electromagnetic generating coil; setting the charging voltage and energy storage level of the pulse capacitor; charging the pulse capacitor bank in the charging circuit to a preset voltage; rapidly discharging the high-voltage electrical energy stored in the capacitor bank to the electromagnetic generating coil to generate a transient strong magnetic field; a huge Lorentz force is induced inside the drive tube, propelling the outer tube to violently impact inward at extremely high speed. This invention can achieve high-performance electromagnetic pulse welding of multi-property material combinations and multi-size tubular components; through the design of the magnet collector and drive unit, it achieves electromagnetic pulse welding of low-conductivity, small-gap tubular components; and innovatively proposes the concept of an intermediate layer, thereby realizing the welding of dissimilar or high-performance, difficult-to-join metals.

The invention provides an electromagnetic welding method and device, an electronic terminal and a computer readable storage medium. The electromagnetic welding method comprises the steps that feature information of a to-be-welded workpiece is obtained; the to-be-welded workpiece at least comprises a flying plate and a base plate; the to-be-welded workpiece is a conductive material; welding parameters of the to-be-welded workpiece are determined through a parameter determination model based on the feature information of the to-be-welded workpiece; the parameter determination model is used for representing a nonlinear mapping relation between the feature information and the welding parameters; and based on the welding parameters of the to-be-welded workpiece, electromagnetic pulse welding operation is conducted on the flying plate and the base plate. Due to the fact that the parameter determination model can accurately map the nonlinear mapping relation between the feature information and the welding parameters, the welding parameters of the to-be-welded workpiece can be rapidly determined through the parameter determination model on the basis of the feature information of the to-be-welded workpiece, and efficient and accurate prediction of the welding parameters of the to-be-welded workpiece with different feature information is achieved; dependence on an experimental trial and error method is eliminated, and the welding efficiency can be improved.

Apparatus (200) for magnetic pulse welding of battery foils, comprising: a coil holder (202), wherein the coil holder (202) comprises two or more electric coils (204) which can be activated by an electric current, a foil holder (208), the foil holder (208) comprising a plurality of arms, the foil holder (208) having a pair of adjacent arms for each electrical coil (204), each pair of adjacent arms being capable of moving toward each other to crimp a plurality of battery foils directly beneath each electrical coil (204) when a pair of adjacent arms grips the foils (104) and moves toward each other, and an anvil (206), wherein the anvil (206) can accommodate a battery tab and the battery foils, wherein the film holder (208) comprises a rear rail (210) supporting the plurality of arms such that the arms can move toward and away from each other along the rear rail (210) to enable crimping of the films (104), wherein the odd arms in the sequence along the rear rail (210) move synchronously in one direction, while the even arms move synchronously in a direction opposite to the odd arms, and The synchronous movement of the arms is controlled by a stepper motor in conjunction with a microprocessor.

The utility model discloses a battery device, a power utilization device and a battery sampling assembly, and relates to the technical field of batteries. Wherein the battery device comprises at least two battery monomers, a confluence piece and a flexible sampling plate, the confluence piece is connected with the at least two battery monomers, and the connected battery monomers can be electrically connected; and the flexible sampling plate is connected with the confluence sheet in an electromagnetic pulse welding mode so as to be electrically connected with the confluence sheet. According to the technical scheme, atomic bonding between the confluence piece and the flexible sampling plate is achieved in an electromagnetic pulse welding mode so as to achieve electrical connection between the confluence piece and the flexible sampling plate, generation of thermal stress and thermal deformation of a connection area between the confluence piece and the flexible sampling plate can be reduced, and the firmness of connection between the flexible sampling plate and the confluence piece is improved.

Procedures (500), comprising: Bending several metal foils (302) of a battery between a punch (204) and a die (202) to form bent metal foils (303), wherein the punch (204) and the die (202) are in a slidably connected relationship to each other, opposite surfaces of the punch (204) and the die (202) are knurled, and the opposite surfaces of the punch (204) and the die (202) are heated by inductive heating, resistance heating, or a combination thereof, and wherein the bent metal foils (303) are corrugated after forming and include a depression having a height of 0.1 to 2 millimeters; Arranging the several curved metal foils (303) in a foil holder; Arranging a battery lead (304) next to the multiple curved metal foils (303) such that a curved section of the multiple curved metal foils (303) is separated from the battery lead (304) by a distance of 0.1 to 2 millimeters, wherein the battery lead (304) has a knurled surface and wherein the knurled surface faces the multiple curved metal foils (303); and Impact welding of the multiple curved metal foils (303), wherein the impact welding is carried out by magnetic pulse welding and comprises activating one or more electrical coils (214, 218) placed near the multiple curved metal foils (303) to enable the multiple curved metal foils (303) to strike each other or the battery conductor (304) at a speed of 300 to 900 meters per second, thereby producing a weld between the metal foils (303) themselves as well as between the metal foils (303) and the battery conductor (304), wherein a Coil holder (206) comprising one or more electrical coils (214, 218), wherein either the coil holder (206) is opposite a first surface of the multiple curved metal foils and this first surface is opposite a second surface of the multiple curved metal foils which is opposite the battery conductor, or wherein the coil holder (206) is opposite a first surface of the battery conductor and this first surface is opposite a second surface of the battery conductor which is opposite a first surface of the multiple curved metal foils.

The present application relates to the field of electromagnetic pulse welding, and provides a kind of electromagnetic pulse welding spot intermetallic compound dynamic growth simulation method, comprising: pre-storing the distribution characteristics of each intermetallic compound in the welding spot at the time of welding;Obtain the action trajectory of the welding spot in the monitoring area and action trajectory;According to the multi-dimensional distribution characteristics of the welding spot in the monitoring area when the welding spot is generated, and compare it with the pre-stored welding spot distribution characteristics of the corresponding intermetallic compound;Dynamic update the distribution characteristics of each intermetallic compound in the welding spot at the time of welding;When the welding spot distribution characteristics change less than the set value within the set time period, the welding spot distribution characteristics at this time are taken as the final form of the welding spot growth, and the time period is divided into multiple sub-periods, and the welding spot distribution characteristics and time domain characteristics of each sub-period are obtained respectively;Couple the welding spot distribution characteristics of each sub-period with the corresponding time domain characteristics, and simulate the dynamic growth process of intermetallic compound.

This invention discloses an electromagnetic pulse welding coil for welding tubular metals. The electromagnetic pulse welding coil is arranged circumferentially along a driving tube. The driving tube can obtain Lorentz force through electromagnetic induction of the electromagnetic pulse welding coil, providing the impact velocity for welding. The electromagnetic pulse welding coil is composed of several circumferentially connected "convex"-shaped structures. The "convex"-shaped structures are arranged with an inward rotation of 90°, and the wide end at the outer end has a notch. One side of the notch is connected to the other side of the notch of the adjacent "convex"-shaped structure through a connecting block, thereby connecting all the "convex"-shaped structures into a whole, forming a ring structure around the driving tube. This invention has the advantages of significantly improving the electromagnetic energy utilization efficiency, increasing electromagnetic energy, and being applicable to electromagnetic pulse welding of difficult-to-deform metals.

The invention discloses an auxiliary propelling device for electromagnetic pulse welding, and belongs to the technical field of electromagnetic pulse welding, the auxiliary propelling device comprises an electromagnetic pulse welding mechanism, two buffering and cooling machines are arranged in the electromagnetic pulse welding mechanism, and the electromagnetic pulse welding mechanism comprises a fixed base; a pulsed magnetic field is generated through an electromagnetic coil, after a driving plate impacts a flying plate at a high speed, a driving rod enters the cambered surface of an arc-shaped groove, so that the driving rod moves on the cambered surface of the arc-shaped groove to weaken the impact force of the driving plate, and the driving rod can drive a rotating assembly to rotate through the arc-shaped groove; the cam can be matched with the current conversion assembly to achieve liquid flowing replacement in the cooling assembly, then cooling of the electromagnetic coil can be achieved without additionally arranging cooling equipment, continuous welding operation is guaranteed, when the buffer plate makes contact with the buffer assembly for further buffering operation, the drive plate is decelerated and reset, the repeated utilization rate of the drive plate is greatly increased, and the production cost is reduced. And the consumable replacement cost and the downtime are reduced.

The invention relates to the technical field of electromagnetic pulse welding, and discloses an electromagnetic pulse welding macroscopic morphology prediction method and system. The method comprises the following steps: receiving multi-physics field real-time monitoring data of electromagnetic field intensity distribution, temperature gradient distribution and material deformation rate in the welding process; performing space-time alignment processing on the data to generate a fusion monitoring data sequence of a unified timestamp and a space coordinate system; extracting an electromagnetic-thermal-mechanical coupling feature vector containing a local energy density change rate and an interface plastic flow trend from the fusion sequence; the feature vectors are input into a pre-trained macroscopic morphology prediction network, and a welding interface dynamic morphology evolution graph is obtained; and generating a morphology control parameter adjusting instruction containing the pulse energy correction and the welding pressure compensation value according to the atlas. The method adapts to the complex characteristics of the welding process, and macroscopic morphology dynamic prediction and parameter adjustment can be achieved.

The invention belongs to the technical field of electromagnetic pulse welding, and particularly relates to an electromagnetic pulse welding device based on cooperative driving of induced eddy current and discharge current, which comprises a connecting seat, an I-shaped coil is fixedly mounted at the top of the connecting seat, and a copper driving plate is arranged at the top of the I-shaped coil. A zirconium alloy plate, a gasket and a stainless steel plate are sequentially arranged above the copper driving plate, and the copper driving plate generates electromagnetic force under the action of pulse current to provide driving force needed by welding. When the electromagnetic pulse welding structure of the I-shaped coil and the through-flow copper driving plate is used for welding a zirconium alloy plate and a stainless steel plate, the electromagnetic driving force borne by the driving plate can be remarkably enhanced through the synergistic effect of the external through-flow and electromagnetic induction, the magnetic field distribution in a welding area is more uniform, and the welding quality is improved. And therefore, the zirconium alloy flying plate obtains overall accelerated deformation in a larger range, and an effective welding joint with a larger area between the zirconium alloy plate and the stainless steel plate is achieved.

The connecting device comprises a fixing table, an electromagnetic pulse welding mechanism, a clamping and fixing mechanism and a lifting covering mechanism, an energy storage capacitor is fixedly arranged on one side of the fixing table, an upper electrode is fixedly arranged on the other side of the energy storage capacitor, and a lower electrode is fixedly arranged on the other side of the energy storage capacitor; a first electromagnetic pulse generator is fixedly arranged at the tail end of the upper electrode, a second electromagnetic pulse generator is fixedly arranged at the tail end of the lower electrode, a positioning seat is fixedly arranged in the middle of the fixing table, a lithium battery is placed on the positioning seat, a clamping and fixing mechanism is arranged in the middle of the fixing table, and a lifting covering mechanism is arranged on the other side of the fixing table; according to the invention, a lithium battery tab and a pole piece are sent to an electromagnetic pulse generation area for connection, the pole piece and the tab destroy original metal atom structures of two materials under the action of extremely high instantaneous pressure waves generated by a high-strength pulsed magnetic field, and two metal atoms are interpenetrated, so that a stable metallurgical structure is formed on the surface.

The electromagnetic pulse welding device comprises a welding assembly, the welding assembly comprises a workbench, an electromagnetic pulse welding device body is installed at the top of the workbench, a coil is arranged at the top of the electromagnetic pulse welding device body, and a flying plate is arranged at the top of the coil; two gaskets are arranged at the top of the flying plate, a substrate is arranged on one sides of the gaskets, a negative electrode is connected to one side of the coil, a positive electrode is arranged on one side of the negative electrode, and a polishing assembly used for polishing workpieces is arranged on one side of the workbench. By arranging the welding assembly, the loop pulse current can be loaded to the flying plate to improve the current density of the flying plate, so that the Lorentz force is increased, the utilization rate of electromagnetic energy is greatly improved, and the problem that in the prior art, the utilization rate of the electromagnetic energy is extremely low, and consequently a large amount of energy is wasted is solved; and the situation that the development and application of the dissimilar alloy electromagnetic pulse welding technology are restricted by much energy waste is avoided.

The foil vaporization welding device for triggering aluminum-based energetic film based on electric pulse comprises a foil vaporization welding tool and a discharge control system (4-1), the magnetic pulse welding tool comprises an upper base plate (1), a lower base plate (7) and a foil vaporization welding assembly arranged between the upper base plate and the lower base plate; the aluminum-based energetic film is a composite structure of a thin aluminum material and an energetic material; in the welding process, the discharge control system applies a high-frequency pulse current to the aluminum-based energetic film to heat and vaporize the thin aluminum material by electric energy, triggers the release of chemical energy of the energetic material when the aluminum material is vaporized, forms mixed energy release of electric energy and chemical energy, and drives the flyer plate and the target plate in the foil vaporization welding assembly to collide by the impact force of the energy release, so that the two are welded and connected; the present application can solve the defects existing in the existing foil vaporization welding technology, such as poor welding effect repeatability, limited welding range, high requirements for power supply system and circuit parameters and the like.

The invention discloses an electromagnetic pulse welding method based on microtexture strengthening, which comprises the following steps: preparing a workpiece to be welded, processing a plurality of linear grooves which are horizontally arranged in the welding slope surface of the workpiece, and separating the adjacent linear grooves through a thin-wall plate; cleaning and drying the workpieces, and inserting the thin-wall plate of the first workpiece into the linear groove of the second workpiece to form a butt joint; and electromagnetic pulse welding equipment is adopted for welding at the butt joint. By the adoption of the scheme, the thin plate butt joint can be welded through electromagnetic pulse welding equipment, electromagnetic pulse welding of butt joint point connection can be achieved, and the key point is that the connection strength and quality of the electromagnetic pulse welding butt joint are effectively improved under the condition that the butt joint precision of a weld joint is guaranteed.

An energy storage cell, in particular a lithium-ion cell, comprising an in particular cylindrical housing main body which extends along a longitudinal axis and forms an arrangement space in which electrode material that is electrically conductively connected to the housing main body is arranged. The arrangement space is delimited at a second end by a cover element and at a first end by a base element. The base element is fastened electrically conductively and gas-tightly to the housing main body by electromagnetic pulse welding.

The application relates to the field of electromagnetic pulse welding and provides a simulation method for microstructure evolution of an electromagnetic pulse micro-welding spot based on finite elements, which comprises the following steps: dividing time nodes and obtaining peripheral frame lines of the microstructure of the electromagnetic pulse micro-welding spot at the time of generation of the microstructure at each time node; obtaining a geometric model of the micro-welding spot at each time node and coupling the peripheral frame lines and the geometric model of the micro-welding spot to finite element software; obtaining micro-welding spot model parameters from the time of generation of the micro-welding spot to the time of completion of generation through the finite element software; re-dividing the time nodes based on the variation amplitude of the micro-welding spot model parameters and evolving the growth process of the microstructure of the micro-welding spot according to the re-divided time stages. According to the variation of the electromagnetic pulse micro-welding spot, the corresponding relationship between the time domain characteristics of the micro-welding spot and the peripheral frame lines, and the finite element theory, the microstructure evolution process of the electromagnetic pulse micro-welding spot can be simulated.

The application discloses a kind of multi-station welding coil and its tooling applied to flat workpiece electromagnetic pulse welding, including multiple parallelly arranged main arms, wherein adjacent main arms are connected together by connecting arm, and the end of the main arm of the edge that is suspended is provided with a bus end, and two bus ends are used to be connected with pulse large current generator to form a loop;Multiple welding positions are sequentially and spaced apart on the main arm along its extension direction, a connecting circuit is provided between adjacent welding positions, and multiple welding positions are connected in series by the connecting circuit, and a main arm is formed;The cross-sectional area of the connecting arm, the connecting circuit and the bus end perpendicular to the current direction is greater than the welding position. It can increase the number of flat metal workpieces welded in a single discharge process, improve the utilization rate of discharge energy, and enhance the adaptability of electromagnetic pulse welding industrial applications.

The application provides an electromagnetic welding method, device, electronic terminal and computer readable storage medium. The electromagnetic welding method comprises the following steps: acquiring characteristic information of a workpiece to be welded; the workpiece to be welded comprises at least a flying plate and a base plate; the workpiece to be welded is made of conductive material; determining welding parameters of the workpiece to be welded based on the characteristic information of the workpiece to be welded through a parameter determination model; the parameter determination model is used to represent a nonlinear mapping relationship between the characteristic information and the welding parameters; and performing an electromagnetic pulse welding operation on the flying plate and the base plate based on the welding parameters of the workpiece to be welded. Since the parameter determination model can accurately map the nonlinear mapping relationship between the characteristic information and the welding parameters, the application can quickly determine the welding parameters of the workpiece to be welded based on the characteristic information of the workpiece to be welded through the parameter determination model, realize efficient and accurate prediction of the welding parameters of the workpiece to be welded with different characteristic information, and get rid of the dependence on the experimental trial-and-error method, which helps to improve the welding efficiency.

The utility model belongs to the technical field of magnetic pulse welding, and particularly relates to a modular magnetic pulse welding coil structure which comprises a plurality of pulse coil modules, a busbar and a plurality of positioning pipes. Wherein the plurality of pulse coil modules are connected in sequence to form an electrical series structure; the busbar provides a synchronous power supply for the plurality of pulse coil modules. A plurality of pulse coil modules are electrically connected in series to form an integral loop, current sequentially flows through the modules to excite and superpose a magnetic field, a busbar intensively inputs high-voltage pulse current to all the modules, synchronous generation of the magnetic field is ensured, and the problem that a traditional coil is difficult to produce in batches is solved. The pulse coil adopts a modular design, and the number of series coils can be flexibly adjusted according to actual conditions, so that multiple workpieces can be welded at a time, and the production efficiency of magnetic pulse welding is improved.

The application discloses a kind of electromagnetic pulse welding equipment and method for copper-clad plate processing, and is related to copper-clad plate processing equipment technical field.The copper-clad plate processing electromagnetic pulse welding equipment, including processing table, processing table is fixedly connected with L-shaped frame, the lower end surface of L-shaped frame transverse section is fixedly connected with electromagnetic pulse welding head by electric telescopic link, the right part of the upper end surface of processing table is installed for the copper layer and base material layer edge alignment in copper-clad plate position correcting mechanism, material removal integrated mechanism includes the drive removal component for driving the movement of transfer frame and the removal unit for removing copper-clad plate from electromagnetic pulse welding head by being arranged on bearing rail, the combination of drive removal component and transfer frame drives copper-clad plate blank to move to specified position on bearing rail, then the processed copper-clad plate is removed by removal unit, can smoothly complete the placement and extraction of copper-clad plate, guarantee the accuracy of processing.

The invention relates to the technical field of high polymer materials, and discloses an electromagnetic pulse welding-based buffer film for packaging electronic components, which is mainly prepared from the following raw materials: modified hydroxyl-terminated silicone oil, IPDI (isophorone diisocyanate), polypropylene oxide glycol, a functional polyol chain extender and the like. The modified hydroxyl-terminated silicone oil and the functionalized polyol chain extender are prepared, the self-repairing effect of the buffer film is improved through reversible self-repairing groups contained in the modified hydroxyl-terminated silicone oil and the functionalized polyol chain extender, and a cross-linked network structure is formed through reaction of polyoximido (C = N-OH) contained in the functionalized polyol chain extender and isocyanate groups. And the mechanical property and the antifouling effect of the buffer film are improved by utilizing a formed cross-linked network structure and a siloxane long chain, the service life of the buffer film is further prolonged, and the preparation method has a wide application prospect in the field of packaging.

An electrochemical cell (20), a means of transport, and a method for manufacturing an assembly (1) for an electrochemical cell (20) are proposed. The method comprises the steps of inserting an electrode pin (2) with a cavity (3) into a cell cup (4), inserting a contact plate (5) into the cavity (3), and welding the contact plate (5) to the electrode pin (2), wherein the welding comprises impact welding and / or magnetic pulse welding.

The utility model discloses an electromagnetic pulse welding device which comprises a bottom plate and a lifting plate capable of moving relative to the bottom plate, coil assemblies are arranged on the bottom plate and the lifting plate, each coil assembly comprises a set of single-turn coil pieces and a metal pressing plate arranged on the outer side of the single-turn coil piece located on the outermost side, magnetic collectors are arranged on the single-turn coil piece and the metal pressing plate, and a machining hole matched with a workpiece is defined by the magnetic collectors. The beneficial effects of the utility model are mainly embodied in that the design is exquisite, the arrangement of the heat dissipation flow channel can carry out forced cooling on the coil, the situation that the device is damaged due to overhigh temperature of the coil during batch production is avoided, and the service life can be prolonged to the greatest extent. In addition, the air inlet amount at the cold air inlet can be controlled through the arrangement of the adjusting valve, it is ensured that the temperature of the coil is within a preset value, and the service life of the coil is maximized.

The invention provides an electromagnetic pulse welding effect perception regulation and control method based on current waveform characteristics. The electromagnetic pulse welding effect perception regulation and control method comprises the following steps that S1, coil current is measured through an oscilloscope and a Rogowski coil; calculating mutual inductance M of the current waveform; according to the distance h between the workpiece and the coil, the frequency omega and the three-dimensional tensor M (h, omega, J) of the nonlinearity J, geometric distance calculation is carried out; s2, inverting a three-dimensional deformation field h (r, theta, z, t) of the workpiece by using a broadband current spectrum; s3, performing pulse adjustment constraint calculation through calculation of the elastic coefficient, the transverse stress and the longitudinal stress; and S4, predicting and controlling the MPC to adjust the capacitor charging voltage U0, the discharging time sequence delta t and the geometric pose of the coil in real time through the constraint model.

The present application relates to the connection method of micro-welding point between metal plates, and particularly relates to an electromagnetic pulse welding method of micro-welding point between metal plates, comprising the following steps: S1, surface treatment is carried out on the surface of two metal plates to remove surface impurities; one metal plate is used as a base plate, and the other metal plate is used as a flying plate; S2, an insulating layer is connected on the surface of the base plate, and a groove is obtained by machining, and a through hole is arranged at the corresponding position of the insulating layer and the groove; S3, tin-copper alloy blank is machined to obtain a sheet-shaped tin-copper alloy piece and a columnar tin-copper alloy piece; the sheet-shaped tin-copper alloy piece is fixed at the bottom end of the groove, and the columnar tin-copper alloy piece is fixed on the surface of the flying plate; S4, the base plate and the flying plate are arranged oppositely, the groove on the base plate corresponds to the position of the columnar tin-copper alloy piece on the flying plate, and electromagnetic pulse welding is carried out on the tin-copper alloy between the metal plates to obtain the micro-welding point between the metal plates. The operation is simple, and the bonding strength and conductivity of the micro-welding point between the metal plates can be effectively improved.

This invention discloses a dissimilar metal electromagnetic pulse welding method assisted by a high-entropy alloy interlayer, belonging to the field of dissimilar metal welding technology. The method involves setting the discharge voltage and discharge capacitor capacity of the electromagnetic pulse welding device, charging the pulse energy storage capacitor, triggering a high-voltage gap switch to discharge, and using a transient magnetic field generated by the electromagnetic coil to drive a first base material plate carrying the high-entropy alloy interlayer to impact a second base material plate at high speed. The interface undergoes high-strain-rate adiabatic shearing to form an in-situ amorphous or nanocrystalline gradient transition layer. This invention organically integrates the high-entropy alloy interlayer with electromagnetic pulse welding technology, effectively suppressing the formation of continuous brittle intermetallic compounds at the dissimilar metal welding interface and significantly improving the mechanical properties of the joint. Furthermore, it achieves quantitative screening of the high-entropy alloy interlayer composition through a three-dimensional orthogonal criterion, overcoming the blindness and low efficiency of traditional trial-and-error material selection methods.

The application provides an electromagnetic pulse welding method based on positive and negative high-voltage power supply bipolarity cooperative discharge, which comprises the following steps: scanning the interface between a flying plate and a base plate by using an eddy current flaw detector before welding, recording roughness and an oxide layer, and determining the eligibility; placing the flying plate and the base plate which pass the pre-examination in parallel according to a gap, inserting an insulating gasket, fixing a discharge coil, and connecting positive and negative electrodes; setting a positive and negative polarity discharge switch trigger time sequence, sending a signal through a fiber optic isolated trigger, and controlling two groups of capacitors to conduct according to the time sequence; collecting a pulse current waveform in real time by using a Rogowski coil during discharge, recording characteristic parameters, calculating a gain coefficient, and compensating and adjusting when deviating; the bipolarity pulse current cooperatively flows through the coil to generate a time-varying magnetic field, the induced eddy current generates a Lorentz force to drive the flying plate to move and realize welding; and the welding area is scanned by using ultrasonic nondestructive testing to obtain a combination rate and a defect number, a welding quality evaluation index is calculated, and the eligibility is determined.

The invention belongs to the technical field of welding machining, and provides an electromagnetic pulse welding device which comprises a box and a mounting shell fixed to the top of the box, and a machining box is arranged in the mounting shell; the welding table is arranged in the processing box, an electromagnetic pulse coil is arranged in the welding table, and the electromagnetic pulse coil is arranged around a welding area; the sealing door is assembled on the processing box through a hinge, and a visual observation window is arranged on the sealing door; the air guiding mechanism is assembled on the processing box and is used for guiding air and vacuumizing; and the limiting mechanism is arranged on the machining box and used for limiting a material plate to be welded. According to the electromagnetic pulse welding device provided by the scheme, the air guide mechanism is used for exhausting air from the machining box, a low-interference welding environment is created, interference of environmental gas to the welding process is reduced, and the problem that the surface of a workpiece is prone to oxidation when high-activity metal is welded is solved.