24 results about "Electromagnetic forming" patented technology

The application discloses a finite element simulation method suitable for multi-step electromagnetic forming effect evaluation and a related device, relates to the technical field of metal plate electromagnetic incremental forming and finite element simulation, and the method comprises the following steps: constructing an initial constitutive model of a to-be-formed plate based on a first uniaxial tensile test; performing finite element simulation on a multi-step electromagnetic forming process of the to-be-formed plate, and recording stress and strain distribution and strain rate distribution of a deformation area; performing a second uniaxial tensile test at each stage of the multi-step electromagnetic forming process according to the strain rate distribution, and integrating hardening models at all stages into a constitutive model for characterizing material whole-process forming; based on the constitutive model, re-performing multi-step electromagnetic forming finite element simulation, outputting forming effect evaluation parameters at each stage, and adjusting process parameters according to the forming effect evaluation parameters. The application can improve the accuracy of forming effect evaluation.

The invention discloses a preparation method, system, device and equipment of an electromagnetic forming coil and a storage medium, and the method comprises the steps that target process parameters of a plate in electromagnetic forming coil machining are obtained, the plate comprises a to-be-machined metal thin plate or pipe, and the target process parameters comprise the target shape and the target size of the plate; generating a control signal based on the target process parameter; generating a forming force based on the control signal; and the forming force acts on the plate, so that the plate is deformed under the action of the forming force. The effect of improving the preparation and production efficiency of the electromagnetic forming coil is achieved.

This application belongs to the field of metal electromagnetic high-speed forming manufacturing technology, specifically disclosing a method and system for obtaining an electromagnetic forming actuator. The method includes: determining the basic structural parameters of the electromagnetic forming actuator with the goal of maximizing the magnetic energy utilization efficiency and the electromagnetic force impulse on the workpiece; obtaining the bottom morphology function of the electromagnetic forming actuator based on the electromagnetic forming force field requirements, and determining the parameters to be optimized and their value ranges in the bottom morphology function; determining a typical deformable workpiece configuration based on the workpiece deformation process and the target forming shape; calculating the weighted average of the magnetic field distribution uniformity index and magnetic energy efficiency of the electromagnetic forming actuator with different bottom morphology parameters on the typical deformable workpiece configuration; and selecting the optimal bottom morphology parameters based on a multi-objective optimization model with the goal of improving the magnetic field uniformity and magnetic energy efficiency. This application fundamentally solves the problem of uneven electromagnetic force caused by the structure of the electromagnetic forming actuator.

A kind of metal pipe fitting electromagnetic forming device and method based on laser heating, with positioning system including positioner, first guide rail, first numerical control moving platform, for accurately positioning metal pipe fitting and mold coordinates;Conveying system includes second guide rail, numerical control moving platform, motor, for realizing the rotation and movement of metal pipe fitting;Heating system includes laser heating device, temperature detector;Electromagnetic forming system includes spiral tube coil, mold, capacitor, DC power supply and control switch;Its characterized in that, motor, fixture, metal pipe fitting, mold, spiral tube coil are horizontally distributed on the same axis, metal pipe fitting can be rotated with the help of motor, and can be moved in the gap between spiral tube coil and mold with the aid of conveying system.The present application can realize uniform heating when metal pipe fitting electromagnetic warm forming, greatly improve heating efficiency, reduce heat affected zone, and improve the position accuracy of metal pipe fitting local microstructure electromagnetic forming.

The application relates to a step-by-step loading type pipe gradual electromagnetic welding method of bidirectional electromagnetic force, and belongs to the field of electromagnetic forming of metal workpieces. The welding method comprises pretreatment before welding, a gradual welding process and a repair welding process. In the gradual welding process, a gradual conduction type is adopted to load electromagnetic force on the welding areas of the inner pipe and the outer pipe by using an expanding coil in the inner pipe and a compression coil outside the outer pipe. The application realizes pipe welding from a line to a plane, facilitates accurate control of the pipe welding process, improves the pipe welding effect and quality, adopts multiple end coils, compression coils and expanding coils to realize diversified electromagnetic force application modes, improves the pipe welding strength, and makes the pipe welding part more firm.

The application discloses a tube plate simultaneous forming device and method, which comprises a magnetic collector, a tube fixing mechanism, a plate fixing mechanism, a die assembly and a power supply mechanism; a containing hole penetrating through the magnetic collector is formed in the magnetic collector, a tube to be necked is inserted into the containing hole, and the outer wall of the magnetic collector comprises a plurality of side surfaces, wherein a magnetic conducting gap is formed in one of the side surfaces and communicates with the containing hole. The application has the advantages that electricity is directly supplied to the plate to be processed, the use of a coil is avoided, the problem of low mechanical strength and easy failure of the coil in the electromagnetic forming process is solved, the deformation resistance of a high-strength difficult-to-deform workpiece is reduced by using a self-resistance heating method, and for the processing of plates and tubes of different sizes, the coil does not need to be designed, the general structure of the magnetic collector does not need to be redesigned, and only the size of the magnetic collector needs to be changed to adapt to the deformation area of the tube plate, so that the cost is greatly reduced.

The application discloses a kind of quick closing switch based on real space gap and its using method, quick closing switch is composed of vacuum cavity and electromagnetic forming device, upper cover plate has input drainage plate and is connected with conductive rod, lower cover plate is concave structure, not only as lower electrode is connected with output drainage plate, and have the effect of flyer, between upper and lower cover plate, through ceramic shell insulation;When quick closing switch receives action signal, first make thyristor switch conduction, pulse capacitor group discharges to forming coil, and pulse large current flows in coil, so that forming coil generates a transient magnetic field, and the lower cover plate placed in the magnetic field induces the eddy current opposite to the coil, so that the lower cover plate is deformed at high speed under the action of electromagnetic repulsion and collides with the conductive rod, and the lower cover plate and the conductive rod form a compression joint or solid-phase welding effect, so that the switch is quickly closed, and the whole switch action process is completed within 50 μs, solve the problem of long mechanical switch action time.

The utility model discloses a coil-free electromagnetic forming device for a metal plate. The coil-free electromagnetic forming device comprises a base, a male die, a height adjusting mechanism, a pressing assembly, a metal plate to be formed and an induction block. A horizontal base plate is arranged at the top of the base; the male die is placed on the base plate; the lower end of the height adjusting mechanism is connected with the base, and the upper end of the height adjusting mechanism is connected with the pressing assembly. The two ends of the to-be-formed metal plate are pressed through the pressing assemblies correspondingly. The two ends of the metal plate to be formed are connected with external current through wires to form a loop. And the induction block is arranged above the metal plate to be formed. The metal sheet forming device has the advantages that no coil is arranged, pulse current is directly applied to the metal sheet to be formed, the high-intensity magnetic field of the metal sheet and the eddy current magnetic field generated by the induction block interact to generate mutual repulsive electromagnetic repulsive force, forming of the metal sheet to be formed is achieved, and the problem that the coil is damaged is solved; and the production, manufacturing and maintenance cost is reduced.

The application provides an electromagnetic forming device and a forming method, which comprises the following steps: a solenoid type coil is closely nested with the upper half of a magnetic field shaper; the lower half of the magnetic field shaper is arranged above a workpiece to be formed; a slit is arranged on the ring of the magnetic field shaper; a die is used to bear the workpiece to be formed; when the electromagnetic forming device works, the solenoid type coil generates a pulse magnetic field around the coil through pulse current discharge; the pulse magnetic field generates induced eddy current on the inner and outer surfaces of the upper half of the magnetic field shaper; the induced eddy current is conducted to the lower end surface of the lower half of the magnetic field shaper through the slit, so that the pulse magnetic field is reshaped and concentrated between the lower half of the magnetic field shaper and the workpiece to be formed, and a pulse electromagnetic force is generated on the forming area of the workpiece to be formed, so that the forming area of the workpiece to be formed is deformed towards the die under the action of the pulse electromagnetic force. The application realizes accurate and effective regulation and control of the spatial distribution of the forming magnetic field in the electromagnetic forming process of the plate.

The invention belongs to the field of electromagnetic crimping, and discloses a separable electromagnetic forming device and method for electromagnetic crimping of a cable joint, a magnetic collector body with an up-down split design is adopted, and a first magnetic collector is driven to move through a lifting mechanism so as to realize combination or separation. When the two magnetic collectors are combined, the two magnetic collectors are electrically connected through deformation of the diversion deformation piece, and a working area and a cavity are formed between the two magnetic collectors and used for crimping a cable connector and placing a magnetic field coil respectively. According to the split type structure, the problem of pulling out the cable joint is solved through mechanical separation, contact surfaces are ensured to be tightly attached through elastic deformation during combination of the flow guide deformation pieces, and ablation caused by point contact due to unevenness of the contact surfaces is reduced. The split type structure overcomes the problems that an integrated magnetic collector cannot be disassembled, and a connector cannot be pulled away after being formed, ablation is reduced through the design of a separable contact surface, the service life of the magnetic collector is prolonged, and therefore the practical application of the electromagnetic crimping technology in cable accessory installation is promoted.

The application discloses an electromagnetic coil precise pose discharging forming system and a forming method, and belongs to the technical field of electromagnetic forming. In the prior art, the position and posture of the electromagnetic coil relative to the skin cannot be adjusted according to the real-time profile of the skin in the process of skin electromagnetic forming, and thus the skin cannot be subjected to suitable electromagnetic force through the electromagnetic coil. The application can adjust the position and posture of the electromagnetic coil relative to the skin profile in real time according to the change of the skin profile during the movement of the electromagnetic coil through real-time detection of the skin profile, ensure that the electromagnetic coil can exert suitable and reasonable electromagnetic force on the skin in the most suitable position and posture, and finally improve the forming precision of the skin profile.

Two connecting rod mechanisms are symmetrically distributed on the upper portion of a platform left and right, each connecting rod mechanism comprises a guide rail extending front and back, sliding blocks are connected to the front end and the rear end of each guide rail in a sliding mode, sliding block bases are fixedly arranged on the sliding blocks, and the sliding block bases on the same side are connected in series through threaded rods. A first synchronous wheel is arranged in the middle of the threaded rod, and threads on the two sides of the threaded rod are arranged reversely. The working platform is made of insulating materials and fixed to the upper side of the upper base, two gaskets are arranged on the bottom face of the upper base, and fixing bases are arranged on the bottom faces of the gaskets and correspond to the sliding block bases on the same side in a one-to-one mode. The connecting rod at the front end of the guide rail and the connecting rod at the rear end of the guide rail are symmetrically arranged; a motor is fixed to the platform, and a second synchronizing wheel is arranged on an output shaft of the motor and is in transmission connection with the two first synchronizing wheels through belts. According to the utility model, the problems of non-automation of lifting of the workbench and non-insulation of the workbench surface in the electromagnetic forming equipment are solved.

The invention belongs to the field of metal workpiece electromagnetic forming, and discloses a pipe fitting welding device adopting an asymptotic electromagnetic welding mode, which comprises a first end coil, a second end coil, a plurality of compression coils, a plurality of bulging coils, an inner pipe fitting and an outer pipe fitting, the axes of the inner pipe fitting and the outer pipe fitting are aligned, and the welding area of the inner pipe fitting and the welding area of the outer pipe fitting are axially overlapped; the first end coil is used for applying axial electromagnetic force to the inner pipe fitting; the second end coil is used for applying axial electromagnetic force to the outer pipe fitting; the bulging coil is used for applying radial outward electromagnetic force to the inner pipe fitting; the compression coil is used for applying radial inward electromagnetic force to the outer pipe fitting. Line-to-surface pipe fitting welding is achieved, the pipe fitting welding process can be accurately controlled conveniently, and the pipe fitting welding effect and quality are improved. The multiple end coils, the compression coils and the bulging coils are adopted, so that diversified electromagnetic force applying modes are achieved, the welding strength of the pipe fitting is improved, and the welding part of the pipe fitting is firmer.

This utility model relates to the field of titanium bipolar plate processing and discloses an electromagnetic forming device for titanium bipolar plates in hydrogen fuel cells. The device includes a processing table, a supporting plate fixedly connected to the upper surface of the processing table, a drive frame mounted on the upper surface of the supporting plate, a lifting device in the middle section of the drive frame, a processing head fixedly mounted at the bottom end of the lifting device, a fixing mechanism on the inner surface of the supporting plate, and an ejection assembly at the lower part of the processing table. The fixing mechanism includes a clamping assembly. In this utility model, with the cooperation of the fixing mechanism, a motor drives a bidirectional threaded rod to move a moving plate, clamping plate one, and clamping plate two to achieve simultaneous clamping of the titanium bipolar plate on four sides. This eliminates the need for manual operation, improving work efficiency and ensuring the titanium bipolar plate is centered and fixed, thus guaranteeing subsequent processing quality. Furthermore, it requires only a single motor drive, reducing costs.

The application relates to a plate electromagnetic forming method based on a conductor ring, which comprises the following steps: determining the number of turns of a driving coil according to the forming specification requirement of a plate; determining the number of metal conductor rings and the size of each metal conductor ring; aligning the axis of the driving coil with the center of the forming area of the plate to be formed and fixing the driving coil; placing a plurality of metal conductor rings between the driving coil and the plate to be formed in sequence; supplying pulse current to the driving coil to form an electromagnetic force, and the plate to be formed is deformed under the action of the electromagnetic force. The application improves the distribution characteristics of the electromagnetic force by introducing the metal conductor ring between the driving coil and the plate to be formed, and realizes the uniform deformation of the plate under the premise of ensuring the forming efficiency.

The application discloses a metal sheet array microstructure electromagnetic forming device and an electromagnetic forming method thereof, which comprises a forming coil, a current collecting device, an array microstructure die, a pulse power source, and the upper part of the current collecting device is an annular part, the lower part is a left and right arranged side U-shaped structure, the forming coil is arranged in the annular part and is positioned through a reinforcing device, the array microstructure die is provided with array microstructure characteristics on at least one side, a sheet blank is arranged on one side of the array microstructure characteristics, and the sheet blank is inserted into the side U-shaped structure of the lower part of the current collecting device and is in contact with the current collecting device. During forming, the forming coil is electrified, a strong instantaneous pulse current is induced in the current collecting device by the forming coil, and when the induced current flows through the sheet blank and a metal plate, strong attraction is generated between the sheet blank and the metal plate to form the sheet blank and the metal plate. The application has reasonable structure, good forming effect and high precision, and can solve the problems of easy damage of a guide frame type uniform pressure coil in the prior art.

The utility model discloses a multifunctional insulating composite fixture for electromagnetic forming equipment, which comprises a fixture body and a base fixed on a workbench, the fixture body is provided with a push rod for driving the fixture body to open and close, one end of the push rod close to the fixture body is provided with a push head, and the other end of the push rod is provided with a reciprocating pushing mechanism. A strip-shaped hole perpendicular to the extending direction of the push rod is formed in the push head, the clamp body comprises a pair of clamping plates, a pair of connecting pieces located on the two sides of the push rod respectively are arranged between the back faces of the clamping plates and the base, the two ends of each connecting piece are hinged to the corresponding clamping plate and the base respectively, and a sliding block connected to the strip-shaped hole in a sliding mode is arranged in the middle of each connecting piece in a protruding mode; arc-shaped grooves used for clamping the tubular part are oppositely formed in the sides, used for clamping, of the two clamping plates in a concave mode, and an insulating layer is arranged on the clamping sides of the two clamping plates. The device is not only suitable for planar plates, but also suitable for cylindrical tubular workpieces, and is wide in application range.

The application discloses an external magnetic concentrator and an electromagnetic forming device. The magnetic concentrator has two through holes, a first through hole is used for placing a coil, a second through hole is used for placing a workpiece to be processed, and a gap is arranged between the first through hole and the second through hole. The magnetic concentrator can make the workpiece to be processed located outside the coil, realize opening and closing of the magnetic concentrator, and facilitate workpiece taking. The electromagnetic forming device is composed of the external magnetic concentrator and the coil. Two or more electromagnetic forming devices can be cooperated with each other, the superposition of magnetic fields is realized, and the processing effect is improved.

The application discloses a kind of magnetic levitation block amorphous plate piece electromagnetic forming mechanism, system and method, belong to amorphous alloy forming field.Combining suspension forming and electromagnetic forming, workpiece is suspended in the whole forming process, avoid workpiece non-forming stage and solid die contact influence forming quality, and electromagnetic force stress is uniform, and double mechanism promotes the surface flatness of amorphous piece surface.Short pulse width operating current is heated to amorphous workpiece plate, ensure that in microsecond time scale complete amorphous workpiece plate temperature rise to over superplastic forming temperature interval, reduce the residence time of workpiece in high temperature zone, prevent workpiece relaxation crystallization, improve heating efficiency, substantially reduce power consumption, reach energy saving and environmental protection effect.Adjustable current pulse controls the strength and direction of magnetic field, can more quickly adjust the strength and direction of magnetic field, to more accurately control the suspension and movement of amorphous workpiece plate, not only help to improve forming precision and stability, also help to improve forming speed and production efficiency.

The invention relates to a high-precision aluminum alloy plate multi-station continuous bending forming device applied to the technical field of plate forming devices, which comprises a controller and a plurality of bending parts, and each bending part comprises an upper track, a lower track, a coil group, an upper bending group, a lower bending group, an ultrasonic assembly and an electromagnetic forming coil. The coil assembly integrates a suspension coil and an induction heating coil, and electromagnetic suspension conveying and induction heating of the aluminum alloy plate are achieved. The upper bending die and the lower bending die are correspondingly arranged and are matched with hydraulic drive of the upper bending set and the lower bending set, and accurate bending positioning and force control are achieved. The ultrasonic assembly applies ultrasonic vibration to the bending area through the piezoelectric transducer and the vibrating beam, the electromagnetic forming coil applies electromagnetic force to the bending area through the magnetostrictive film, the yield strength of the material is cooperatively reduced, and the bending precision is improved; and a communicated cooling chamber is arranged between the bending parts, so that the temperature control of a bending area is realized, and the precision, efficiency and intelligent level of bending processing of the aluminum alloy plate are improved.

This invention discloses an impact-expansion composite electromagnetic forming fixture and process. The impact-expansion composite electromagnetic forming fixture includes a fixed support base and a positioning housing located directly above the support base and connected to the positioning end of a positioning actuator. An electromagnetic drive coil connected to the electromagnetic forming system circuit is fixedly installed on the upper inner side of the positioning housing. A copper drive block located below the electromagnetic drive coil is movably installed on the lower inner side of the positioning housing. A core rod expansion device corresponding to the heat transfer tube of the workpiece is installed at the bottom of the copper drive block. This invention uses a strong pulse power supply to connect the electromagnetic drive coil for instantaneous discharge, inducing a strong magnetic field, causing eddy currents on the copper drive block, generating Lorentz force, driving the copper drive block to impact downward at high speed, producing a mechanical impact strengthening effect on the welding area. The core rod expansion device realizes high-speed mechanical expansion of the tube wall, thereby achieving integrated high-performance manufacturing of the heat transfer tube bundle welding structure.

A through-flow electromagnetic forming device based on wide electrode sets comprises a forming die, placing planes are formed by the upper end faces of the two ends of the forming die, the electrode sets are placed on the two placing planes, each electrode set comprises a first electrode and a second electrode which are distributed up and down, and the two electrode sets clamp the two ends of a workpiece to be formed respectively. The width of each electrode group is larger than that of the workpiece to be formed, and the cross sectional area of each electrode group is not smaller than the area of each placing plane; an edge pressing plate is arranged above the two electrode sets, and the electrode sets and the edge pressing plate are detachably connected to the forming die through the locking piece. Due to the arrangement of the width and the cross section area of the electrode group, the contact area between the workpiece and the electrode is large, the contact resistance and energy loss are reduced, the uniformity of current distribution in the workpiece is effectively improved, and the situation that the workpiece or the electrode is damaged due to overheating due to local heating when current passes through caused by overlarge contact resistance is avoided; and the workpiece and the electrode group are fixed on the forming die through the pressing block, so that the workpiece and the electrode group are not easy to displace.

The invention belongs to the field of computational mechanics and material science, and particularly discloses an electromagnetic forming numerical simulation method and system based on multi-fidelity data, and the method comprises the steps: constructing an electromagnetic-mechanical field simulation model, and generating a material parameter-speed data set through random sampling, so as to train a deep learning speed model; integrating the trained deep learning speed model into the electromagnetic-mechanical field simulation model to replace iterative calculation of the electromagnetic-mechanical field simulation model; wherein the inputs of the electromagnetic-mechanical field simulation model and the deep learning speed model are material parameters of different metal plates, and the outputs are deformation speeds of the metal plates under the electromagnetic action. According to the method, the calculation efficiency and accuracy of the deformation speed in electromagnetic forming can be improved, and the prediction stability in an unknown density and strength region is improved.

The invention relates to a pipe fitting bulging device for enhancing the magnetic field intensity of the end of a bulging area, and belongs to the field of metal workpiece electromagnetic forming control. The strengthening conductor ring is additionally arranged between the driving coil and the to-be-formed pipe fitting, the strengthening conductor ring is arranged at the end of the bulging area of the to-be-formed pipe fitting, the strengthening conductor ring is used for strengthening the magnetic field intensity of the end of the bulging area of the to-be-formed pipe fitting, and uniform bulging of the pipe fitting is achieved through the strengthening conductor ring. According to the method, the problem that the bulging uniformity of the pipe fitting is affected due to the end effect in a traditional pipe fitting bulging method is solved, uniform bulging of the pipe fitting is achieved, the flatness of the bulging pipe fitting is improved, and the problem that the wall thickness of a bulging area of the pipe fitting is reduced in the traditional pipe fitting bulging method is effectively solved.