CN112275887B - Electromagnetic orthopedic device and orthopedic method - Google Patents
Electromagnetic orthopedic device and orthopedic method Download PDFInfo
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- CN112275887B CN112275887B CN202010910854.9A CN202010910854A CN112275887B CN 112275887 B CN112275887 B CN 112275887B CN 202010910854 A CN202010910854 A CN 202010910854A CN 112275887 B CN112275887 B CN 112275887B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
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Abstract
The invention discloses an electromagnetic shape righting device and a shape righting method, belonging to the technical field of metal forming and manufacturing, and comprising a uniform pressure driving coil, a magnetic field shaper, a conductive channel and a die; the uniform pressure driving coil is arranged in the conductive channel; the conductive channel and the workpiece to be orthopedic form a conductive loop; the magnetic field shaper is arranged between the uniform pressure driving coil and the workpiece to be reshaped; the uniform pressure driving coil generates a pulse magnetic field around the uniform pressure driving coil through pulse current discharge, and the pulse magnetic field generates an induced eddy current on the surface of the magnetic field shaper; the magnetic field shaper is matched with the uniform pressure driving coil to generate an induced current in the conductive loop, and the induced current generates a pulse electromagnetic force on a region to be formed of a workpiece to be corrected; the area to be formed of the workpiece to be reshaped is deformed to the die under the action of the pulse electromagnetic force. The invention can flexibly and accurately regulate and control the shape-righting or multiple forming processes of the workpiece through the optimized design of the magnetic field shaper, thereby effectively reducing the design difficulty and the manufacturing cost of the forming device.
Description
Technical Field
The invention belongs to the technical field of metal forming and manufacturing, and particularly relates to an electromagnetic orthopedic device and an orthopedic method.
Background
The use of the light alloy material provides an effective realization way for the light weight of industrial production in the fields of automobiles, aerospace and the like. Meanwhile, the common light alloy materials such as aluminum alloy, titanium alloy and the like have poor forming performance at normal temperature, low plasticity and small elastic modulus, and the effect of the traditional processing technology is not ideal. Research shows that the high-speed forming can effectively improve the forming performance of the light alloy at normal temperature. Therefore, the electromagnetic forming technique has been widely used in the field of processing light alloy materials such as aluminum alloys.
The use of uniform pressure drive coils is an effective method in the electromagnetic forming of non-axisymmetric plates. In electromagnetic forming of a panel, the following common problems exist: (1) in the one-step forming method, a certain error may occur between the size of the plate and the size of the die due to insufficient discharge energy or material rebound, or local wrinkling may occur due to collision between the plate and the die due to excessive discharge energy; (2) in the multiple progressive forming method, the part of the plate is not yet attached with the die after the initial forming, the distance between the local area of the plate and the coil is enlarged during the subsequent forming, the magnetic field intensity generated in the forming process can be obviously reduced, the electromagnetic force required by the forming can be insufficient, and the forming precision of the plate is influenced; (3) because the spatial distribution of the magnetic field is difficult to control accurately during the plate forming process, it is difficult to achieve a forming process with complex requirements (e.g., forming of local complex features). For the above problems, the method of using the driving coil with a special shape increases the difficulty of designing the coil, which leads to increase of manufacturing cost, poor flexibility, single application range of the coil, and the like.
Disclosure of Invention
The invention provides an electromagnetic shape correcting device and an electromagnetic shape correcting method, aiming at adding a magnetic field shaper between a uniform pressure driving coil and a workpiece to be corrected in the electromagnetic shape correcting process of a plate or the subsequent shape correcting process of multiple forming, and filling an air gap between the coil and the workpiece, so as to enhance the magnetic field intensity in the shape correcting process, improve the electromagnetic force generated in the shape correcting area of the workpiece, and improve the shape correcting precision of the workpiece, thereby solving the technical problems that the magnetic field space distribution is difficult to control in the electromagnetic shape correcting process and a driving coil with a special shape needs to be designed in the prior art.
To achieve the above object, according to one aspect of the present invention, there is provided an electromagnetic orthotic device comprising: the device comprises a uniform pressure driving coil, a magnetic field shaper, a conductive channel and a mold;
the uniform pressure driving coil is arranged in the conductive channel; the conductive channel is positioned above the workpiece to be reshaped and forms a conductive loop with the workpiece to be reshaped; the magnetic field shaper is arranged between the uniform pressure driving coil and the workpiece to be reshaped; the workpiece to be reshaped is positioned above the die;
the uniform pressure driving coil is used for generating a pulse magnetic field around the uniform pressure driving coil through pulse current discharge, and the pulse magnetic field generates induced eddy currents on the surface of the magnetic field shaper; the magnetic field shaper is used for being matched with the uniform pressure driving coil to generate induction current in the conductive loop, and the induction current generates pulse electromagnetic force on a region to be formed of the workpiece to be reshaped; the area to be formed of the workpiece to be reshaped is deformed to a die under the action of the pulse electromagnetic force;
the die is used for restraining the formed shape of the workpiece to be orthopedic.
Preferably, the magnetic field generating device further comprises a power supply, wherein the power supply is used for providing pulse current for the uniform pressure driving coil so as to drive the uniform pressure driving coil to generate a pulse magnetic field.
Preferably, the shape of the upper surface of the magnetic field shaper is the same as the shape of the lower surface of the uniform pressure driving coil.
Preferably, the inner profile of the conductive channel is the same as the outer profile of the uniform pressure drive coil.
Preferably, the magnetic field shaper is fixedly connected with the uniform pressure driving coil or the magnetic field shaper is fixedly connected with the conductive channel, so that the magnetic field shaper keeps fixed in position during the forming process of the workpiece to be reshaped.
Preferably, a plurality of said magnetic field shapers and a plurality of said power supplies are further comprised; the power supplies respectively supply power to the magnetic field shapers.
According to another aspect of the present invention, there is provided an electromagnetic orthopaedic method including the steps of:
s1, placing the workpiece to be orthopedic on a die;
s2, placing a conductive channel on the workpiece to be orthopedic, and applying load to the conductive channel to provide edge pressing force to the workpiece to be orthopedic;
s3, placing a uniform-pressure driving coil inside the conductive channel and connecting the uniform-pressure driving coil to a power supply;
s4, placing a magnetic field shaper between the uniform pressure driving coil and the workpiece to be reshaped, and fixedly connecting the magnetic field shaper with the conductive channel;
and S5, the power supply discharges the uniform pressure driving coil to generate a pulse magnetic field, so that induced eddy current is generated on the surface of the magnetic field shaper, and the pulse current and the induced eddy current generate induced current in a conductive loop formed by the workpiece to be reshaped and the conductive channel, so that electromagnetic force is generated on the forming area of the workpiece to be reshaped to drive the workpiece to be reshaped to deform.
Preferably, the method further comprises the following steps:
and repeating the steps S4 and S5 until the workpiece to be reshaped is completely fit with the mold.
Preferably, the gap between the magnetic field shaper and the uniform pressure drive coil and the workpiece to be reshaped is kept small enough to maximize the electromagnetic force generated on the workpiece to be reshaped.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. by adding the magnetic field shaper, the forming magnetic field intensity can be enhanced in the subsequent shape-correcting process of performing electromagnetic shape correction or multiple progressive forming by using the uniform pressure driving coil, so that the shape correction of the plate is effectively realized;
2. according to the invention, by changing the geometric shape of the magnetic field shaper, the spatial distribution of the orthopedic magnetic field can be effectively regulated and controlled, the accuracy of plate orthopedic is improved, and the complex forming requirement can be met; compared with the driving coil with a special shape, the invention can be suitable for various driving coils, and reduces the design and manufacturing cost of the driving coil under different requirements, thereby reducing the manufacturing cost of the electromagnetic orthopedic device;
3. according to the invention, by adopting a plurality of separated magnetic field shapers and a plurality of uniform pressure driving coils supplied by a plurality of power supplies to be matched, more accurate regulation and control of the space-time distribution of a formed magnetic field are realized, so that more complicated and accurate orthopedic requirements are met.
Drawings
FIG. 1 is a schematic structural diagram of an electromagnetic orthotic device according to an embodiment of the present invention;
FIG. 2 is a front view of a coil-field shaper-conductive channel system according to an embodiment of the present invention;
FIG. 3 is a side view of a configuration of a coil-field shaper-conductive channel system in accordance with an embodiment of the present invention;
fig. 4 (a) is a schematic view before electromagnetic straightening in embodiment 1 of the present invention;
fig. 4 (b) is a schematic view after electromagnetic correction in embodiment 1 of the present invention;
fig. 5 (a) is a schematic view showing the present invention in example 2 without correction;
fig. 5 (b) and 5 (c) are schematic views of multiple progressive formations in a second embodiment of the invention;
fig. 5 (d) is a schematic view after completion of the electromagnetic reshaping in the second embodiment of the present invention;
fig. 6 (a) is a schematic view of a third embodiment of the present invention before reshaping;
fig. 6 (b) is a schematic view after completion of the reshaping by the third embodiment of the present invention;
FIG. 7 is a schematic diagram of a current waveform in a uniform-pressure driving coil provided by a capacitive energy storage power system in an embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: a uniform pressure driving coil 1; a magnetic field shaper 2; a conductive path 3; a power supply 4; a workpiece 5 to be reshaped; and a mold 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-3, the present invention provides an electromagnetic orthotic device comprising: the device comprises a uniform pressure driving coil 1, a magnetic field shaper 2, a conductive channel 3 and a die 6;
the uniform pressure driving coil 1 is arranged in the conductive channel 3; the conductive channel 3 is positioned above the workpiece 5 to be reshaped and forms a conductive loop with the workpiece 5 to be reshaped; the magnetic field shaper 2 is arranged between the uniform pressure driving coil 1 and the workpiece 5 to be reshaped; the workpiece 5 to be reshaped is located above the die 6;
the uniform pressure driving coil 1 is used for generating a pulse magnetic field around the uniform pressure driving coil through pulse current discharge, and the pulse magnetic field generates an induced eddy current on the surface of the magnetic field shaper 2; the magnetic field shaper 2 is used for cooperating with the uniform pressure driving coil 1 to generate an induced current in the conductive loop, and the induced current generates a pulse electromagnetic force on a region to be formed of the workpiece 5 to be reshaped; the region to be formed of the workpiece 5 to be reshaped is deformed to a die under the action of the pulse electromagnetic force;
the die 6 is used for restraining the formed shape of the workpiece 5 to be reshaped.
Specifically, the magnetic field generating device further comprises a power supply 4, wherein the power supply 4 is used for providing a pulse current for the uniform pressure driving coil 1 so as to drive the uniform pressure driving coil 1 to generate a pulse magnetic field.
Specifically, the shape of the upper surface of the magnetic field shaper 2 is the same as the shape of the lower surface of the uniform pressure driving coil 1.
Specifically, the inner contour of the conductive channel 3 is the same as the outer contour of the uniform pressure drive coil 1.
Specifically, the magnetic field shaper 2 is fixedly connected with the uniform pressure driving coil 1 or the magnetic field shaper 2 is fixedly connected with the conductive channel 3, so that the magnetic field shaper 2 keeps fixed in position during the forming process of the workpiece 5 to be reshaped.
Specifically, the magnetic field shaper 2 and the power supply 4 are also provided; the power supplies respectively supply power to the magnetic field shapers.
The invention also provides an electromagnetic orthopedic method, which comprises the following steps:
s1, placing the workpiece to be orthopedic on a die;
s2, placing a conductive channel on the workpiece to be orthopedic, and applying load to the conductive channel to provide edge pressing force to the workpiece to be orthopedic;
s3, placing a uniform-pressure driving coil inside the conductive channel and connecting the uniform-pressure driving coil to a power supply;
s4, placing a magnetic field shaper between the uniform pressure driving coil and the workpiece to be reshaped, and fixedly connecting the magnetic field shaper with the conductive channel;
and S5, the power supply discharges the uniform pressure driving coil to generate a pulse magnetic field, so that induced eddy current is generated on the surface of the magnetic field shaper, and the pulse current and the induced eddy current generate induced current in a conductive loop formed by the workpiece to be reshaped and the conductive channel, so that electromagnetic force is generated on the forming area of the workpiece to be reshaped to drive the workpiece to be reshaped to deform.
Specifically, the method further comprises the following steps:
and repeating the steps S4 and S5 until the workpiece to be reshaped is completely fit with the mold.
Specifically, the gap between the magnetic field shaper and the uniform pressure driving coil and the workpiece to be reshaped is kept small enough to maximize the electromagnetic force generated on the workpiece to be reshaped.
In a further aspect, the present invention provides an electromagnetic orthopedic device combining a uniform pressure drive coil and a magnetic field shaper, as shown in fig. 1, comprising a uniform pressure drive coil 1, a power source 4, a magnetic field shaper 2, a conductive channel 3, a die 6, and a workpiece 5 to be orthopedic. The workpiece 5 to be reshaped and the die 6 are oppositely arranged, the conductive channel 3 is oppositely arranged with the workpiece 5 to be reshaped, the uniform pressure driving coil 1 is arranged in the middle of the conductive channel 3, the magnetic field shaper 2 is arranged between the uniform pressure driving coil 1 and the workpiece 5 to be reshaped, and the power supply 4 is electrically connected with the uniform pressure driving coil 1. The conductive channel 3 is used for forming a conductive loop with the workpiece 5 to be reshaped and providing a blank holder force for the workpiece 5 to be reshaped during the forming process. In the forming process, the transverse flow of the workpiece to the inside of the die 6 is controlled by adjusting the blank holding pressure, the uniform pressure driving coil 1 is used for generating pulse current, and the magnetic field shaper 2 is used for cooperating with the uniform pressure driving coil 1 to provide pulse electromagnetic force for the workpiece 5 to be reshaped through electromagnetic induction so as to drive the workpiece to deform; the power supply 4 is used to provide power to the device.
In further detail, as shown in fig. 2 and 3, the shape of the upper surface of the magnetic field shaper 2 is the same as or similar to the shape of the lower surface of the uniform pressure driving coil 1, and the shape of the lower surface of the magnetic field shaper 2 can be optimally designed according to the geometry of the workpiece 5 to be reshaped and the die 6. In the embodiment of the invention, the upper surface of the magnetic field shaper 2 is a rectangular structure with the same or similar shape as the lower surface of the uniform pressure driving coil 1, and the upper surface is close to the lower surface of the uniform pressure driving coil 1 as much as possible under the condition of ensuring insulation so as to obtain a larger pulse magnetic field. The lower surface of the magnetic field shaper 2 is of a circular arc structure which is the same as or similar to the inner surface of the die 6, namely the shape of the lower surface of the magnetic field shaper 2 is the same as or similar to the shape of the upper surface of the workpiece 5 to be reshaped after forming. In the orthopedic process, the magnetic field shaper 2 regulates and controls the spatial distribution of an orthopedic magnetic field, so that the workpiece 5 to be orthopedic is attached in the die 6, and because the lower surface of the magnetic field shaper 2 is the same as or similar to the shape of the inner surface of the die, after the workpiece 5 to be orthopedic is formed, the magnetic field shaper 2 can still make the formed workpiece driven by electromagnetic force in the arc surface of the shaped workpiece 5 to be orthopedic by regulating and controlling the spatial distribution of the magnetic field, and the rebound phenomenon of the workpiece after the workpiece is orthopedic is avoided.
Specifically, the material of the magnetic field shaper 2 is selected according to the magnitude of the electrical conductivity and the strength of the material.
Optionally, the material of the magnetic field shaper 2 is a copper or aluminum alloy material.
To explain further, as shown in fig. 2, the inner contour of the conductive channel 3 is the same as or similar to the outer contour of the uniform-pressure driving coil 1, so that the uniform-pressure driving coil 1 can be properly placed in the conductive channel 3 and the relative position of the two can be restrained.
Specifically, the material of the conductive channel 3 is selected according to the magnitude of the conductivity and the strength of the material.
Optionally, the material of the conductive channel 3 is copper or aluminum alloy material.
Stated further, during the forming process, the pulse current passing through the lower surface of the uniform pressure driving coil 1 induces a reverse eddy current on the upper surface of the magnetic field shaper 2. So that an electromagnetic repulsion force is generated between the uniform pressure driving coil 1 and the magnetic field shaper 2, and therefore an additional position constraint needs to be applied between the magnetic field shaper 2 and the uniform pressure driving coil 1 or the conductive channel 3. Specifically, in the embodiment of the present invention, the magnetic field shaper 2 and the conductive channel 3 are mechanically connected by a fixing member to avoid unexpected displacement of the magnetic field shaper 2 during the forming process. The uniform pressure driving coil 1, the magnetic field shaper 2, and the conductive channel 3 are insulated from each other at their contact surfaces.
In a further embodiment of the present invention, the electromagnetic orthotic device may further comprise a plurality of magnetic field shapers in a separate combination, and a plurality of uniform pressure drive coils respectively powered by a plurality of power sources. The power supply, the driving coil and the magnetic field shaper are optimally configured, so that the space-time distribution of the formed magnetic field is more accurately regulated and controlled, and the more complex and accurate forming requirement is met.
The technical solution of the present invention is further described by the following specific examples:
example 1
As shown in fig. 4, an embodiment of the present invention provides an electromagnetic orthopedic device and an orthopedic method based on the same, which are used for orthopedic work pieces with insufficient forming accuracy caused by rebound of plate materials. The electromagnetic orthotic device comprises: the device comprises a uniform pressure driving coil 1, a magnetic field shaper 2, a conductive channel 3, a power supply 4, a workpiece to be reshaped 5 and a die 6. Wherein the uniform pressure driving coil 1 is a uniform pressure coil wound by a copper wire in a single layer, the cross section of the wire is 2mm multiplied by 4mm, and the number of turns is 18; the lower surface profile of the magnetic field shaper 2 is the same as the inner profile of the die, the material is copper, and the magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrict the position of the conductive channel; the inner contour of the conductive channel 3 is the same as the outer contour of the uniform pressure driving coil 1, and the material is copper; the power supply 4 is a capacitive energy storage type power supply system, and the waveform of a coil provided by the power supply is shown in fig. 7; the workpiece 51 is a long straight plate which has resilience after being formed and is made of aluminum alloy; the inner contour generatrix of the die 6 is arch-shaped and is made of high-strength die steel.
The electromagnetic orthopedic method comprises the following steps:
(1) the workpiece 51 with springback after the pre-forming and the die 6 are oppositely arranged;
(2) placing the conductive path 3 on the workpiece 51 and applying a load to the conductive path 3 to provide a blank holding force to the workpiece 51;
(3) placing the uniform pressure driving coil 1 in the middle of the conductive channel 3 and electrically connecting with the power supply 4;
(4) the magnetic field shaper 2 is arranged between the uniform pressure driving coil 1 and the workpiece 51, and the gap between the magnetic field shaper 2 and the uniform pressure driving coil 1 and the workpiece 51 is as small as possible under the premise of considering the insulation requirement so as to maximize the electromagnetic force generated on the workpiece 51. The magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrain the position of the conductive channel;
(5) the uniform pressure driving coil 1 is discharged through the power supply 4 to generate pulse current, a pulse strong magnetic field is excited around the pulse current, eddy current is induced on the surface of the magnetic field shaper 2, the pulse current in the uniform pressure driving coil 1 and the eddy current on the surface of the magnetic field shaper 2 induce current in a conductive loop formed by the workpiece 51 and the conductive channel 3, and therefore electromagnetic force is generated on a forming area of the workpiece 51 to drive the workpiece 51 to deform at a high speed so as to correct rebound errors to the workpiece 52.
Example 2
As shown in fig. 5, an embodiment of the invention provides an electromagnetic orthopedic device and an orthopedic method based on the device, which are used for carrying out multiple progressive forming on a long straight plate. The electromagnetic orthotic device comprises: the device comprises a uniform pressure driving coil 1, a magnetic field shaper 2, a conductive channel 3, a power supply 4, a workpiece 5 and a die 6. Wherein the uniform pressure driving coil 1 is a uniform pressure coil wound by a copper wire in a single layer, the cross section of the wire is 2mm multiplied by 4mm, and the number of turns is 18; the lower surface profile of the magnetic field shaper 2 is the same as the inner profile of the die, the material is copper, and the magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrict the position of the conductive channel; the inner contour of the conductive channel 3 is the same as the outer contour of the uniform pressure driving coil 1, and the material is copper; the power supply 4 is a capacitive energy storage type power supply system, and the waveform of a coil provided by the power supply is shown in fig. 7; the workpiece 51 is a long straight plate to be formed and is made of aluminum alloy; the inner contour generatrix of the die 6 is arch-shaped and is made of high-strength die steel.
The method for multiple progressive orthotics comprises the following steps:
(1) the workpiece 51 to be formed and the die 6 are placed opposite to each other;
(2) placing the conductive path 3 on the workpiece 51 and applying a load to the conductive path 3 to provide a blank holding force to the workpiece 51;
(3) placing the uniform pressure driving coil 1 in the middle of the conductive channel 3 and electrically connecting with the power supply 4;
(4) discharging the uniform pressure driving coil 1 through the power supply 4, generating electromagnetic force to drive the workpiece 51 to perform to the workpiece 52;
(5) the magnetic field shaper 2 is arranged between the uniform pressure driving coil 1 and the workpiece 52, and the gap between the magnetic field shaper 2 and the workpiece 52 is as small as possible under the premise of considering the insulation requirement so as to maximize the electromagnetic force generated on the workpiece 52. The magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrain the position of the conductive channel;
(6) discharging the uniform pressure driving coil 1 through the power supply 4, and generating electromagnetic force to drive the workpiece 52 to deform at high speed so as to shape the workpiece 53;
(7) and (5) repeating the steps (5) and (6) until the plate die attaching effect is good to the workpiece 54.
Example 3
As shown in fig. 6, one embodiment of the present invention provides an electromagnetic orthopedic device and an orthopedic method based on the device for forming partially complex features on a pre-formed workpiece. The electromagnetic orthotic device comprises: the device comprises a uniform pressure driving coil 1, a magnetic field shaper 2, a conductive channel 3, a power supply 4, a workpiece 5 and a die 6. Wherein the uniform pressure driving coil 1 is a uniform pressure coil wound by a copper wire in a single layer, the cross section of the wire is 2mm multiplied by 4mm, and the number of turns is 18; the contour of the lower surface of the magnetic field shaper 2 is the same as the general contour of the inner surface of the die, the material is copper, and the magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrict the position of the conductive channel; the inner contour of the conductive channel 3 is the same as the outer contour of the uniform pressure driving coil 1, and the material is copper; the power supply 4 is a capacitive energy storage type power supply system, and the waveform of a coil provided by the power supply is shown in fig. 7; the workpiece 51 is a preformed long straight plate made of aluminum alloy; the inner contour generatrix of the die 6 is in an arch shape with a sharp angle at part, and the material is high-strength die steel.
The method for correcting the local complex features comprises the following steps:
(1) placing the pre-formed workpiece 51 and the die 6 opposite to each other;
(2) placing the conductive path 3 on the workpiece 51 and applying a load to the conductive path 3 to provide a blank holding force to the workpiece 51;
(3) placing the uniform pressure driving coil 1 in the middle of the conductive channel 3 and electrically connecting with the power supply 4;
(4) the magnetic field shaper 2 is arranged between the uniform pressure driving coil 1 and the workpiece 51, and the gap between the magnetic field shaper 2 and the uniform pressure driving coil 1 and the workpiece 51 is as small as possible under the premise of considering the insulation requirement so as to maximize the electromagnetic force generated on the workpiece 51. The magnetic field shaper 2 is mechanically connected with the conductive channel 3 to restrain the position of the conductive channel;
(5) the uniform pressure driving coil 1 is discharged through the power supply 4 to generate pulse current, a pulse strong magnetic field is excited around the pulse current, eddy current is induced on the surface of the magnetic field shaper 2, the pulse current in the uniform pressure driving coil 1 and the eddy current on the surface of the magnetic field shaper 2 induce current in a conductive loop formed by the workpiece 51 and the conductive channel 3, and therefore electromagnetic force is generated on a forming area of the workpiece 51 to drive the workpiece 51 to deform at high speed so as to complete forming of local complex features to the workpiece 52.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. An electromagnetic orthotic device, comprising: the device comprises a uniform pressure driving coil (1), a magnetic field shaper (2), a conductive channel (3) and a mold (6);
the uniform pressure driving coil (1) is arranged inside the conductive channel (3); the conductive channel (3) is positioned above the workpiece (5) to be reshaped and forms a conductive loop with the workpiece (5) to be reshaped; the magnetic field shaper (2) is arranged between the uniform pressure driving coil (1) and the workpiece (5) to be reshaped; the workpiece (5) to be reshaped is located above the die (6);
the uniform pressure driving coil (1) is used for generating a pulse magnetic field around the uniform pressure driving coil through pulse current discharge, and the pulse magnetic field generates induced eddy currents on the surface of the magnetic field shaper (2); the magnetic field shaper (2) is used for cooperating with the uniform pressure driving coil (1) to generate an induced current in the conductive loop, and the induced current generates a pulse electromagnetic force on a region to be formed of the workpiece (5) to be reshaped; the area to be formed of the workpiece (5) to be reshaped is deformed to a die under the action of the pulse electromagnetic force;
the mould (6) is used for restraining the formed shape of the workpiece (5) to be reshaped.
2. The electromagnetic orthotic device according to claim 1, further comprising a power source (4), wherein the power source (4) is configured to provide a pulsed current to the uniform pressure drive coil (1) to drive the uniform pressure drive coil (1) to generate a pulsed magnetic field.
3. The electromagnetic orthopaedic device according to claim 2, wherein the magnetic field shaper (2) is fixedly connected to the uniform-pressure drive coil (1) or the magnetic field shaper (2) is fixedly connected to the electrically conductive channel (3) in order to keep the magnetic field shaper (2) stationary during the shaping of the workpiece (5) to be orthopaedic.
4. The electromagnetic orthopaedic device according to claim 2 or 3, further comprising a plurality of said magnetic field shapers (2) and a plurality of said power sources (4); the power supplies respectively supply power to the magnetic field shapers.
5. An orthopedic method based on the electromagnetic orthopedic device according to any one of claims 1-4, characterized by the steps of:
s1, placing the workpiece to be orthopedic on a die;
s2, placing a conductive channel on the workpiece to be orthopedic, and applying load to the conductive channel to provide edge pressing force to the workpiece to be orthopedic;
s3, placing a uniform-pressure driving coil inside the conductive channel and connecting the uniform-pressure driving coil to a power supply;
s4, placing a magnetic field shaper between the uniform pressure driving coil and the workpiece to be reshaped, and fixedly connecting the magnetic field shaper with the conductive channel;
and S5, the power supply discharges the uniform pressure driving coil to generate a pulse magnetic field, so that induced eddy current is generated on the surface of the magnetic field shaper, and the pulse current and the induced eddy current generate induced current in a conductive loop formed by the workpiece to be reshaped and the conductive channel, so that electromagnetic force is generated on the forming area of the workpiece to be reshaped to drive the workpiece to be reshaped to deform.
6. An orthopedic method according to claim 5, further comprising the steps of:
and repeating the steps S4 and S5 until the workpiece to be reshaped is completely fit with the mold.
7. The orthopedic method of claim 5 or 6 wherein the gap between the magnetic field shaper and the uniform pressure drive coil and the workpiece to be orthopedic is kept small enough to maximize the electromagnetic force generated on the workpiece to be orthopedic.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010910854.9A CN112275887B (en) | 2020-09-02 | 2020-09-02 | Electromagnetic orthopedic device and orthopedic method |
| PCT/CN2021/095989 WO2022048198A1 (en) | 2020-09-02 | 2021-05-26 | Electromagnetic shape correction device and shape correction method |
| ZA2022/10357A ZA202210357B (en) | 2020-09-02 | 2022-09-19 | Electromagnetic shape righting device and shape righting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010910854.9A CN112275887B (en) | 2020-09-02 | 2020-09-02 | Electromagnetic orthopedic device and orthopedic method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112275887A CN112275887A (en) | 2021-01-29 |
| CN112275887B true CN112275887B (en) | 2022-03-18 |
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| CN202010910854.9A Active CN112275887B (en) | 2020-09-02 | 2020-09-02 | Electromagnetic orthopedic device and orthopedic method |
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| CN (1) | CN112275887B (en) |
| WO (1) | WO2022048198A1 (en) |
| ZA (1) | ZA202210357B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112275887B (en) * | 2020-09-02 | 2022-03-18 | 华中科技大学 | Electromagnetic orthopedic device and orthopedic method |
| CN113333561B (en) * | 2021-05-13 | 2022-02-11 | 华中科技大学 | Electromagnetic forming device and method based on conductive channel |
| CN114453519B (en) * | 2021-12-27 | 2023-06-30 | 鹤壁天淇汽车模具有限公司 | Reverse folding forming manufacturing method of high-strength plate automobile panel die |
| CN114309232B (en) * | 2021-12-27 | 2022-08-16 | 华中科技大学 | Micro-channel fillet correction device and method for metal plate |
| CN114713702B (en) * | 2022-03-24 | 2023-05-30 | 华中科技大学 | Electric explosion-based metal processing workpiece orthopedic processing device and method |
| WO2024072834A1 (en) * | 2022-09-28 | 2024-04-04 | Belvac Production Machinery, Inc. | Systems, devices, and methods for electromagnetic forming articles |
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| US3196649A (en) * | 1962-02-16 | 1965-07-27 | Advanced Kinetics Inc | Devices for metal-forming by magnetic tension |
| CN102248059A (en) * | 2011-06-16 | 2011-11-23 | 华中科技大学 | Multistage and multidirectional electromagnetic forming method and device |
| CN102263272A (en) * | 2011-06-14 | 2011-11-30 | 哈尔滨工业大学 | Electromagnetic driving flexible-mould forming device and method for fuel cell metal bipolar plate |
| CN109647963A (en) * | 2018-12-27 | 2019-04-19 | 华中科技大学 | A kind of electromagnetism orthopedic appliance and straightening method |
| CN110560547A (en) * | 2019-08-14 | 2019-12-13 | 武汉理工大学 | metal plate uniform-pressure electromagnetic forming device and method under action of anisotropic current |
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| TW200911405A (en) * | 2007-09-10 | 2009-03-16 | Metal Ind Res & Dev Ct | Electromagnetic forming device for metal sheet |
| US7954357B2 (en) * | 2007-10-05 | 2011-06-07 | GM Global Technology Operations LLC | Driver plate for electromagnetic forming of sheet metal |
| CN103341546B (en) * | 2013-07-15 | 2015-02-11 | 哈尔滨工业大学 | Device and method for forming light alloy shell formed part through magnetic pulses |
| CN206731895U (en) * | 2017-05-02 | 2017-12-12 | 三峡大学 | A kind of device for improving electro-magnetic forming workpiece patch mould |
| CN108856443B (en) * | 2018-06-13 | 2019-08-09 | 中南大学 | It is a kind of that the electromagnetic forming device and method continuing electromagnetic force are provided |
| CN109865760B (en) * | 2018-12-19 | 2020-09-18 | 华中科技大学 | Electromagnetic forming device and method based on modular magnetic collector |
| CN112275887B (en) * | 2020-09-02 | 2022-03-18 | 华中科技大学 | Electromagnetic orthopedic device and orthopedic method |
-
2020
- 2020-09-02 CN CN202010910854.9A patent/CN112275887B/en active Active
-
2021
- 2021-05-26 WO PCT/CN2021/095989 patent/WO2022048198A1/en active Application Filing
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- 2022-09-19 ZA ZA2022/10357A patent/ZA202210357B/en unknown
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| US3196649A (en) * | 1962-02-16 | 1965-07-27 | Advanced Kinetics Inc | Devices for metal-forming by magnetic tension |
| CN102263272A (en) * | 2011-06-14 | 2011-11-30 | 哈尔滨工业大学 | Electromagnetic driving flexible-mould forming device and method for fuel cell metal bipolar plate |
| CN102248059A (en) * | 2011-06-16 | 2011-11-23 | 华中科技大学 | Multistage and multidirectional electromagnetic forming method and device |
| CN109647963A (en) * | 2018-12-27 | 2019-04-19 | 华中科技大学 | A kind of electromagnetism orthopedic appliance and straightening method |
| CN110560547A (en) * | 2019-08-14 | 2019-12-13 | 武汉理工大学 | metal plate uniform-pressure electromagnetic forming device and method under action of anisotropic current |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022048198A1 (en) | 2022-03-10 |
| CN112275887A (en) | 2021-01-29 |
| ZA202210357B (en) | 2022-12-21 |
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