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70 results about "Electromagnetic forming" patented technology

Electromagnetic forming (EM forming or magneforming) is a type of high velocity, cold forming process for electrically conductive metals, most commonly copper and aluminium. The workpiece is reshaped by high intensity pulsed magnetic fields that induce a current in the workpiece and a corresponding repulsive magnetic field, rapidly repelling portions of the workpiece. The workpiece can be reshaped without any contact from a tool, although in some instances the piece may be pressed against a die or former. The technique is sometimes called high velocity forming or electromagnetic pulse technology.

Magnetic pulse strengthening device and process for improving performance of additive forming workpiece

The invention discloses a magnetic pulse strengthening device and process for improving the performance of an additive forming workpiece, the magnetic pulse strengthening device comprises a base, an additive forming table and a first vertical positioning mechanism, and the first vertical positioning mechanism is connected with a lifting positioning plate; a horizontal longitudinal positioning mechanism and a second vertical positioning mechanism are fixedly arranged on the top face of the lifting positioning plate, a horizontal transverse positioning mechanism is arranged on the horizontal longitudinal positioning mechanism, an arc fuse wire additive welding gun assembly is arranged on the horizontal transverse positioning mechanism, and a magnetic pulse strengthening assembly is connected to the second vertical positioning mechanism. Every time the arc fuse wire additive welding gun assembly completes additive deposition forming of one layer, the magnetic pulse strengthening assembly conducts impact strengthening on the top surface of the workpiece through magnetic field force. According to the method, the electromagnetic forming technology is creatively applied to post-treatment of the WAAM technology, magnetic pulse strengthening plastic deformation on the surface of the workpiece is achieved, the influence layer depth is high, and the mechanical property and uniformity of the material are improved.
Owner:HEFEI UNIV OF TECH

Forming method suitable for Laval type pipe

The invention discloses a forming method suitable for a Laval type pipe, relates to the technical field of Laval type pipe machining and manufacturing, and innovatively combines two high-speed forming processes of electromagnetic forming and electro-hydraulic forming for Laval type pipe machining. Electromagnetic force can be utilized to realize rapid and uniform diameter shrinkage of the pipe, and damage caused by mechanical contact is avoided; according to the electro-hydraulic bulging, the pipe can be bulged according to a preset shape by accurately controlling the liquid pressure, and a good forming effect is achieved. The method is simple in experimental device, high in operability, high in energy utilization rate, high in forming speed and high in forming precision. In order to solve the technical problems existing in the production of the Laval type pipe, the forming characteristics of electromagnetic forming and electro-hydraulic forming are combined, a method of combining diameter shrinkage of a thin-wall pipe driven by pulsed magnetic field force and controllable bulging of electro-hydraulic forming impact force is provided, and efficient, accurate and low-cost machining of the Laval type pipe is achieved.
Owner:HARBIN INST OF TECH +1

Flexible electromagnetic progressive shape correction method for continuous large-profile peak height defect of skin

The invention discloses a skin continuous large-profile peak height defect flexible electromagnetic progressive shape correction method, which comprises the following steps: establishing an electromagnetic shape correction skin large-profile peak height deformation prediction model, and determining the influence of material flow on deformation of adjacent areas needing shape correction in the shape correction process of a continuous large-profile peak height skin sheet metal part; and meanwhile, by restraining the influence on deformation of the adjacent protruding area after electromagnetic shaping of the protruding area, the electromagnetic shaping frequency and the single electromagnetic shaping force are optimized, automatic shaping of the continuous large-contour peak-height skin sheet metal part is achieved, and the automatic shaping precision of the continuous large-contour peak-height skin sheet metal part is improved. The efficiency is improved, and the labor cost is reduced.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

A finite element simulation method and related device suitable for multi-step electromagnetic forming effect evaluation

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.
Owner:HARBIN INSTITUTE OF TECHNOLOGY SUZHOU RESEARCH INSTITUTE

Electromagnetic tube bulging method using reinforced conductor ring and bulging device

The present application relates to a pipe electromagnetic bulging method using a reinforced conductor ring, and belongs to the field of electromagnetic forming control of metal workpieces. The present application increases a reinforced conductor ring between a driving coil and a pipe to be formed, and the reinforced conductor ring is arranged at the end of the bulging area of the pipe to be formed. The reinforced conductor ring is used to enhance the magnetic field intensity at the end of the bulging area of the pipe to be formed, and the uniform bulging of the pipe is realized by using the reinforced conductor ring. The present application also discloses a corresponding pipe electromagnetic bulging device. The present application solves the problem of the influence of the end effect on the uniformity of the pipe bulging in the traditional pipe bulging method, realizes the uniform bulging of the pipe, improves the flatness of the bulged pipe, and effectively improves the problem of the wall thickness reduction of the pipe bulging area in the traditional pipe bulging method.
Owner:CHINA THREE GORGES UNIV

An electromagnetic forming method and device based on a three-coil dual-power supply board

ActiveCN115156381BCapacitanceEddy current
An electromagnetic forming method and device based on a three-coil dual-power supply board. The method includes the following steps: S1. Clamp the edge of the metal board to fix the metal board, place a background magnetic field coil and an eddy current coil above the metal board, and place an improvement coil below the metal board; S2. Connect the background magnetic field coil to a long-pulse-width power supply system to generate a background magnetic field; S3. When the long-pulse-width pulse current reaches the peak value, connect the eddy current coil and the improvement coil in series and then connect them to a short-pulse-width power supply system, so that the board in the magnetic field is subjected to an upward Lorentz force and deforms upward. The present invention realizes a new scheme for forming a board by the cooperation of three groups of coils under the action of attractive electromagnetic force. By controlling the discharge voltage and the capacitor capacitance value in the three groups of power supply devices, the eddy current and the magnetic field can be flexibly regulated, and the diversified loading of the Lorentz force can be realized.
Owner:CHINA THREE GORGES UNIV

Preparation method, system, device and equipment of electromagnetic forming coil and storage medium

PendingCN121131515AControl signalMetal sheet
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.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

A method and system for acquiring an electromagnetic shaping actuator

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.
Owner:HUAZHONG UNIV OF SCI & TECH

A device and method for electromagnetic precision forming of a local microstructure of a difficult-to-deform metal pipe based on laser heating

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.
Owner:CHINA WEAPON SCI ACADEMY NINGBO BRANCH

A device for high-rate fluid-driven precise forming of sheet metal and a forming method thereof

The application discloses a kind of high-speed fluid driving sheet accurate forming device and its forming method, including electromagnetic forming coil, coil reinforcement plate, conductive driving block, driving punch, fluid constraint mould and forming mould, electromagnetic forming coil is installed in coil reinforcement plate, the lower end of driving punch is provided with coil reinforcement plate, and the upper end is sealed slidingly connected with the constraint cavity in fluid constraint mould, forming mould is set to be able to press the sheet in the upper of constraint cavity, fluid with liquid level lower than sheet is arranged in constraint cavity, and the side of forming mould close to sheet is provided with forming cavity.The application adopts inverted forming device, when liquid level is lower than sheet surface, electromagnetic forming coil discharge can drive punch to accelerate liquid.When high-speed liquid and sheet contact, sheet is endowed with very high deformation speed, so as to improve the forming limit of material.
Owner:CENT SOUTH UNIV

Polygonal structure magnetic collector

The utility model discloses a multi-edge structure magnetic collector, and belongs to the technical field of electromagnetic forming. According to the magnetic collector, the magnetic collector body of a hollow structure is adopted, the crimping area of the stranded wire and the outer pipe is located in the inner through hole of the magnetic collector body and forms the working area, and the distance increasing component used for increasing the distance between the outer pipe and the inner surface of the magnetic collector body is arranged in the working area and on the inner surface of the inner through hole; the arrangement of the distance increasing component can increase the distance between the outer pipe and the inner surface of the magnetic collector, thereby reducing the magnetic pressure on the outer pipe at the center, enabling the collision speeds of the outer pipe and the stranded wire in the axial direction to be the same, achieving the regulation and control of the axial stress and deformation speed of the outer pipe, improving the deformation uniformity of the outer pipe, and improving the production efficiency. The problem of strand breakage of the stranded wire caused by overhigh collision speed between the outer pipe at the center of the magnetic collector and the stranded wire is prevented, and the stability of the contact resistance of the cable joint is improved.
Owner:BAOJI POWER SUPPLY CO OF STATE GRID SHAANXI ELECTRIC POWER CO LTD

Workpiece electromagnetic forming method and device based on eddy current attraction

The invention belongs to the field of metal electromagnetic forming manufacturing, particularly relates to a workpiece electromagnetic forming method and device based on vortex attraction, and aims to solve the problem of axial non-uniformity of a pipe fitting or the problem of radial non-uniformity of a plate in a traditional electromagnetic forming technology. A conductor is introduced into the middle of a driving coil, eddy current induced in the conductor and eddy current in a to-be-formed metal workpiece mutually generate electromagnetic attraction force according to the eddy current attraction principle, the electromagnetic attraction force is opposite to electromagnetic force for workpiece forming machining in direction, and the deformation amount of the middle of the workpiece is reduced; uniform deformation of the pipe fitting in the axial direction or uniform deformation of the plate piece in the radial direction is achieved. According to the method, the quality and precision of the formed workpiece are improved, and new possibility is provided for further application of the electromagnetic forming technology in the field of high-precision manufacturing.
Owner:CHINA THREE GORGES UNIV

Step loading bi-directional electromagnetic force pipe gradual electromagnetic welding method

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.
Owner:CHINA THREE GORGES UNIV

Workpiece electromagnetic forming numerical simulation modeling method and system

The invention belongs to the field of electromagnetic forming, and particularly discloses a workpiece electromagnetic forming numerical simulation modeling method and system.The method comprises the steps that a trained first full-connection deep neural network model is adopted, and a tangential magnetic field component is calculated according to workpiece deformation real-time surface coordinates and normal vectors; dynamic magnetic pressure is generated in combination with a magnetic pressure correction coefficient output by the trained second full-connection deep neural network model; and applying the magnetic pressure to a mechanical model of the workpiece as a surface load, and iteratively solving a bidirectional coupling effect of workpiece deformation and an electromagnetic field. The problem that an existing workpiece electromagnetic forming modeling method cannot be compatible in the aspects of calculation efficiency, geometric adaptability and physical consistency is solved.
Owner:HUAZHONG UNIV OF SCI & TECH

Electromagnetic forming assistance-based explosive welding device and using method thereof

The invention discloses an explosive welding device based on electromagnetic forming assistance and a using method thereof, and belongs to the explosive welding technology, the device comprises an electromagnetic forming assembly, an energy-containing plastic pipe and a red copper pipe, the electromagnetic forming assembly generates pulse current through current conduction and forms a transient magnetic field, the red copper pipe is arranged in the transient magnetic field, and the energy-containing plastic pipe is connected with the red copper pipe. The energy-containing plastic pipe deforms and is impacted at a high speed so as to finish welding; the electromagnetic forming assembly can uniformly drive the red copper pipe to perform radial necking, so that the energy-containing plastic pipe is subjected to uniform impact force in the circumferential direction, the energy-containing plastic pipe deflagrates at high temperature and high pressure to generate symmetrical cylindrical waves, and an internal workpiece is driven to uniformly deform; according to the explosive welding device, explosive is replaced by energetic plastic for explosive welding, so that the safety and practicability of explosive welding are greatly improved, and large-scale industrial and automatic production is facilitated; the device is simple in structure and principle, convenient to use and produce and high in safety, and has good popularization and application value.
Owner:BAOJI POWER SUPPLY CO OF STATE GRID SHAANXI ELECTRIC POWER CO LTD

Tube sheet simultaneous forming apparatus and method

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.
Owner:CHINA AGRI UNIV +1

Electromagnetic forming device and method for part drawing process

The invention provides an electromagnetic forming device for a part drawing process. The electromagnetic forming device comprises a male die, a female die and a female die, the female die is matched with the male die; the radial side thrust coil is used for providing radial side thrust for the plate; the axial deep drawing coil is used for providing axial thrust for the male die, and the male die extrudes the plate; the lower induction coil and the upper induction coil are used for providing circumferential pressure stress for reducing a plate flange area; wherein the radial lateral thrust coil, the axial drawing coil, the lower induction coil and the upper induction coil are connected in series; meanwhile, the invention further provides an electromagnetic forming method for the part drawing process.
Owner:AVIC XIAN AIRCRAFT IND GRP CO LTD

Multi-coil array electromagnetic forming device based on modular coil units

The multi-coil array electromagnetic forming device comprises a workbench and at least one coil mounting plate, the coil mounting plates are arranged on the front side, the rear side, the left side, the right side or the top face of the workbench, and at least one coil unit is arranged on each coil mounting plate through a moving assembly. The coil units are installed on the moving assembly through pluggable structures, and the moving assembly not only can adjust the distance between the adjacent coil units, but also can adjust the moving distance of all the coil units. The coil units can be installed on the coil installation plates through the pluggable structures, then the coil installation plates are installed on the corresponding faces of the workbench, coil arrays can be formed on the workbench, electromagnetic force needed for part forming is provided, and the parts can be formed through the different coil units and the coil installation plates on the different sides. And different types of coil arrays can be formed, so that the forming requirements of diversified parts are met.
Owner:CHONGQING UNIV

Combined electromagnetic forming device for power cable

The invention relates to the technical field of metal forming and manufacturing, in particular to a combined electromagnetic forming device for a power cable, which comprises a control module, a power supply module and a plurality of magnetic collectors arranged in an array, the power supply module comprises a plurality of pulse power supplies; each magnetic collector is provided with a through circular-truncated-cone-shaped hole; forming coils are uniformly distributed on the periphery of each magnetic collector; each pulse power supply is electrically connected with each forming coil; the control module comprises a parameter acquisition module and a discharge control module; the parameter acquisition module is used for acquiring workpiece parameters of the to-be-machined workpiece; and the discharge control module is used for generating discharge parameters according to the workpiece parameters of the workpiece to be machined and controlling each pulse power supply to discharge according to the generated discharge parameters. By the adoption of the scheme, the working area of single-time machining can be increased, accurate control over the electromagnetic force is achieved by optimizing the discharging parameters of the pulse power source, and therefore the forming quality and precision of the workpiece to be machined are effectively improved.
Owner:国网重庆市电力公司璧山供电分公司

Electromagnetic forming on-line measuring device and measuring method

The application discloses an electromagnetic forming online measuring device and a measuring method, and is characterized in that a curvature arc is arranged at one end of an electromagnetic forming coil assembly to adapt to the forming surface of the to-be-formed material with different shapes, the other end of the electromagnetic forming coil assembly is movably connected with a supporting rod, the electromagnetic forming coil assembly is driven to swing relative to the supporting rod through a motion device, and then the angle relationship between the electromagnetic forming coil assembly and the forming surface is calculated through the included angle between the electromagnetic forming coil assembly and the supporting rod; a distance detection device is arranged, the distance detection device is used for detecting the distance between the electromagnetic forming coil assembly and the forming surface of the to-be-formed material and the point cloud data of the forming surface, and then the electromagnetic force size and direction of the electromagnetic forming coil assembly are accurately adjusted through the angle relationship between the electromagnetic forming coil assembly and the forming surface, the distance and the point cloud data of the forming surface, so that the electromagnetic forming precision of the electromagnetic forming coil assembly on the to-be-formed material is ensured.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Thin-wall part electromagnetic forming device with bearing die

A large-scale thin-wall component can be machined through traditional electromagnetic forming, however, due to the fact that the back side of a workpiece lacks a support, the position of the large-scale thin-wall component is uncertain after the large-scale thin-wall component is stressed, and the machining precision is not high. According to the scheme, the thin-wall part electromagnetic forming device with the bearing die is adopted, the multiple bearing columns which are arranged in the transverse row and can stretch out and draw back independently are arranged in the bearing die, the ends of the bearing columns are used for abutting against a workpiece plate, displacement of a workpiece caused by electromagnetic impact can be effectively limited, and the electromagnetic forming precision is improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Plate magnetic high-speed stamping forming device and machining method

PendingCN119657740Areduce plastic deformationReduce reboundElectromagnetic formingMachining
The invention belongs to the technical field of plate electromagnetic forming, and discloses a plate magnetic high-speed stamping forming device which comprises a female die and a male die used in cooperation, and a plate to be machined is arranged between the female die and the male die; a guide bin and a supporting block are arranged on the outer side of the male die. The supporting block is located at the bottom of the guide bin. The driving plate is located at the bottom of the male die and connected with the male die; the insulating block is fixedly provided with an electromagnetic coil, and the electromagnetic coil is connected with the pulse current loop through a wire; the electromagnetic coil discharges to generate electromagnetic force to enable the driving plate to move upwards so as to drive the male die to impact a to-be-machined plate at a high speed, and plastic deformation occurs in the material thickness direction. The invention further provides a machining method for machining the plate through the device. The device and the method have the advantages of high forming efficiency and high forming precision.
Owner:CENT SOUTH UNIV

A fast closing switch based on vacuum gap and method of using the same

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.
Owner:XIXIAN NEW DISTRICT MAITENENG AUTOMATION EQUIP CO LTD

Buffer system parameter design method for electromagnetic forming, buffer system and electromagnetic forming system

The invention discloses a buffer system parameter design method for electromagnetic forming, a buffer system and an electromagnetic forming system.The buffer system is used for buffering acting force of electromagnetic pulse force of a forming coil on a machine tool and comprises a hydraulic buffer unit, a gas-liquid buffer unit and a one-way throttling unit; the hydraulic cylinder is arranged on the machine tool, and the forming coil is arranged on the end face of the end, extending out of the hydraulic cylinder, of the piston. And designing the buffer system parameters according to the buffer system design performance indexes. The acceleration of the piston and the forming coil is limited through the inertia of the piston and the oil pressure together, the pulse electromagnetic force is buffered, the back-off amount of the piston and the forming coil in the pulse electromagnetic force acting stage and the buffering stage can be reduced, the stability of the distance between the forming coil and a workpiece is guaranteed, and the change of the pulse electromagnetic force is avoided; the forming effect is ensured.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Metal plate coil-free electromagnetic forming device

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.
Owner:WUHAN INST OF TECH

Forming production process of integrated rear axle housing

The invention discloses a forming production process of an integrated rear axle housing, which comprises the following steps of: 1, selecting a seamless steel tube as a raw material, and placing a driving coil in the seamless steel tube to provide electromagnetic force for forming; secondly, the seamless steel pipe with the drive coil is placed in a mold, and the drive coil is connected with electric appliance control equipment for electromagnetic forming; thirdly, the mold is started, primary electromagnetic forming is conducted after the upper mold and the lower mold are closed, and then a semi-finished product is obtained; according to the forming production process of the integrated rear axle housing, the electromagnetic forming technology is used for replacing an internal high-pressure forming mode, the investment cost for producing the integrated rear axle housing is effectively reduced, the production benefit is improved, meanwhile, only the forming procedure is needed for electromagnetic forming, and therefore the investment cost of equipment and molds is effectively reduced, and the production efficiency is improved. And electromagnetic forming also belongs to a high-strain forming process scheme, so that the formability of the material can be greatly improved, and the cracking problem of the integrated rear axle housing is effectively solved.
Owner:KUNSHAN HEZHUN TESTING CO LTD

Electromagnetic coil accurate pose discharge forming system and forming method

The invention discloses an electromagnetic coil accurate pose discharge forming system and a forming method, belongs to the technical field of electromagnetic forming, and aims to solve the problems that in the skin electromagnetic forming process in the prior art, the pose of an electromagnetic coil relative to a skin cannot be correspondingly adjusted according to the real-time contour of the skin, and the cost is low. And proper electromagnetic force cannot be applied to the skin through an electromagnetic coil. By detecting the skin profile in real time, the position and posture parameters of the electromagnetic coil relative to the skin profile can be adjusted in real time according to the change of the skin profile in the moving process of the electromagnetic coil, it is guaranteed that the electromagnetic coil can apply appropriate and reasonable electromagnetic force to the skin at the most appropriate position and posture, and finally the forming precision of the skin profile is improved.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Plate electromagnetic flanging device based on L-shaped magnetic field converter

The invention belongs to the field of metal workpiece electromagnetic forming control, and particularly relates to a plate electromagnetic flanging device based on an L-shaped magnetic field converter, the plate electromagnetic flanging device comprises a driving coil, the magnetic field converter and a blank holder, the magnetic field converter comprises a hollow base and a convex ring on the base; the driving coil is arranged below a base of the magnetic field converter, and a to-be-formed area of a to-be-flanged plate is located above the base and on the outer side of a convex ring; the edge pressing device is used for fixing an edge pressing area of a plate to be flanged. The invention further discloses a corresponding plate flanging method. The plate flanging angle is greatly increased, loading of different radial electromagnetic force and axial electromagnetic force in a plate flanging area in the plate flanging process is achieved by designing the magnetic field converters with different base outer diameters and convex ring heights, and the plate flanging efficiency and forming quality are improved.
Owner:CHINA THREE GORGES UNIV

Multi-coil array electromagnetic forming device based on modular coil units

The present invention discloses a multi-coil array electromagnetic forming device based on modular coil units, comprising a workbench and at least one coil mounting plate, wherein the coil mounting plate is arranged on the front, rear, left, right or top surface of the workbench, and at least one coil unit is arranged on the coil mounting plate via a movable assembly, wherein the coil unit is mounted on the movable assembly via a pluggable structure, and the movable assembly not only adjusts the distance between adjacent coil units, but also adjusts the moving distance of all coil units. The pluggable structure enables the coil units to be mounted on the coil mounting plate, and then the coil mounting plate is mounted on the corresponding surface of the workbench, so that a coil array can be formed on the workbench, providing the electromagnetic force required for part forming. Different types of coil arrays can be formed by different coil units and coil mounting plates on different sides, thereby meeting the needs of forming diversified parts.
Owner:CHONGQING UNIV

Acquisition method and system of electromagnetic forming driver

The invention belongs to the technical field of metal electromagnetic high-speed forming manufacturing, and particularly discloses a method and system for obtaining an electromagnetic forming driver, and the method comprises the steps: taking the magnetic energy utilization efficiency of the electromagnetic forming driver and the maximum electromagnetic force impulse on a workpiece as targets, and determining basic structure parameters of the electromagnetic forming driver; based on the electromagnetic forming force field requirement, a bottom morphology function of an electromagnetic forming driver is obtained, and to-be-optimized parameters and a value range in the bottom morphology function are determined; determining a typical deformation workpiece configuration based on the deformation process of the workpiece and the target forming shape; and calculating a weighted mean value of the magnetic field distribution uniformity index and the magnetic energy efficiency of the electromagnetic forming drivers with different bottom morphology parameters on the typical deformation workpiece configuration, and selecting the optimal bottom morphology parameter based on a multi-target optimization model by taking improvement of the magnetic field uniformity degree and the magnetic energy efficiency as a target. The problem that electromagnetic force is not uniform due to an electromagnetic forming driver structure and the like is fundamentally solved.
Owner:HUAZHONG UNIV OF SCI & TECH