CN109013821B - Electromagnetic forming device and method for metal plate - Google Patents
Electromagnetic forming device and method for metal plate Download PDFInfo
- Publication number
- CN109013821B CN109013821B CN201810937509.7A CN201810937509A CN109013821B CN 109013821 B CN109013821 B CN 109013821B CN 201810937509 A CN201810937509 A CN 201810937509A CN 109013821 B CN109013821 B CN 109013821B
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- metal plate
- electromagnetic
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- power supply
- forming
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 99
- 239000002184 metal Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 229910001234 light alloy Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to an electromagnetic forming device and method for a metal plate, comprising a substrate, wherein an induction block, a positioning die and a metal plate to be formed are sequentially overlapped from bottom to top in the middle of the upper surface of the substrate, the shape of the metal plate to be formed corresponds to that of the positioning die, two ends of the metal plate to be formed are respectively overlapped with conductive joints, a first power supply device is connected between the conductive joints at two ends, and a pressing plate is arranged on the upper surface of each conductive joint and fixedly connected with the substrate; and a second power supply device is connected between the two ends of the induction block. The invention has simple and reasonable structure, can directly apply current to the metal plate, and can be used for forming the electromagnetic repulsive force of the metal plate and the electromagnetic attractive force of the metal plate.
Description
Technical field:
the invention relates to an electromagnetic forming device and method for a metal plate.
The background technology is as follows:
in recent years, with the increasing prominence of energy and environmental problems, light alloy materials typified by aluminum alloys, magnesium alloys, and titanium alloys have been increasingly used, and light alloy materials have long become important materials indispensible from human life, production, and social development.
Complicated forming of light alloy plates has been a popular problem in the field of metal material processing and forming. At normal temperature, the light alloy plate has poor plasticity, and is easy to break in the complex forming process. Although the forming performance of the light alloy sheet can be obviously improved by adopting the thermoforming process, the conventional thermoforming process has longer period and higher cost and is not suitable for mass production.
The electromagnetic pulse forming technology is a high-energy and high-speed special processing method for plastic processing of metal blanks by utilizing pulse electromagnetic force, and the forming performance of the metal materials is improved (forming limit is improved, rebound is small, wrinkling is inhibited and the like) due to factors such as inertia effect, material constitutive relation under high speed, electro-plastic effect in the electromagnetic forming process and the like. Therefore, electromagnetic forming has been used for forming various sheet metal tube parts.
When the traditional electromagnetic forming works, a strong magnetic field is generated around the coil, induced current is generated by the high-conductivity plate under the action of the strong magnetic field, an eddy current magnetic field is generated by the interaction of the strong magnetic field generated by the coil and the eddy current magnetic field generated by the plate, and the plate is attached to the surface of the forming die through the deformation stages of bulging, die attaching and the like under the action of the eddy current force, so that the blank is finally formed. The coil forming method often has the following problems: (1) The coil has higher manufacturing and processing cost, and various forms of damages can be generated due to the thermal effect and electromagnetic force of current during operation, so that the use of the coil is influenced. (2) The current required for the electromagnetic force of workpiece forming is the eddy current induced in the metal material due to electromagnetic induction, the eddy current induced in the material with low conductivity is small, and the existing technology cannot provide the electromagnetic forming force necessary for the deformation of the material. (3) In actual operation, the ignition problem easily occurs at the joint of the coil, and the damage to equipment is possibly caused.
The invention comprises the following steps:
the invention improves the problems existing in the prior art, namely the technical problem to be solved by the invention is to provide the electromagnetic forming device and the electromagnetic forming method for the metal plate, which have simple and reasonable structure, can directly apply current to the metal plate, and can be used for forming electromagnetic repulsive force of the metal plate and electromagnetic attractive force of the metal plate.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the electromagnetic forming device for the metal plate comprises a substrate, wherein an induction block, a positioning die and a metal plate to be formed are arranged in the middle of the upper surface of the substrate, the induction block, the positioning die and the metal plate to be formed are sequentially overlapped from bottom to top, the shape of the metal plate to be formed corresponds to that of the positioning die, two ends of the metal plate to be formed are respectively overlapped with conductive joints, a first power supply device is connected between the conductive joints at the two ends, and a pressing plate is arranged on the upper surface of each conductive joint and fixedly connected with the substrate; and a second power supply device is connected between the two ends of the induction block.
Further, a concave part which is used for being matched with the metal plate to be formed in the forming of electromagnetic attraction force is formed in the middle of the upper surface of the positioning die.
Further, the outer side end of the pressing plate is pressed in the overlapping area of the conductive joint and the metal plate to be formed, and a rounding corner matched with the metal plate to be formed in the forming of electromagnetic repulsive force is arranged at the lower part of the inner side end.
Further, a through hole is formed at one end of the conductive connector, which is far away from the metal plate to be formed; the wires at two ends of the first power supply device are connected into the through holes on the conductive joints at two ends through bolts and nuts respectively.
Further, the conductive joint is made of copper sheets.
Further, a blind hole is respectively formed in the left end and the right end of the induction block, and wires at the two ends of the second power supply device are respectively pressed into the blind hole through screws.
Further, the sensing block is made of copper.
Further, the substrate and the positioning die are both made of insulating materials; the metal sheet to be formed is a high-conductivity or low-conductivity material.
Further, first mounting holes are respectively formed in four corners of the substrate; the front end and the rear end of the pressing plate are respectively provided with a second mounting hole corresponding to the first mounting hole positioned on the same side, and the pressing plate and the base plate are locked in a matched manner through a locking bolt and a locking nut which penetrate through the first mounting hole and the second mounting hole from bottom to top.
The invention adopts another technical scheme that: an electromagnetic forming method for a metal plate comprises the following specific steps:
(1) Shaping of electromagnetic repulsive force: the first power supply device directly discharges the metal plate to be formed, the metal plate to be formed is electrified and generates a strong magnetic field, the induction block generates reverse current and generates an eddy current magnetic field under the action of the strong magnetic field, the strong magnetic field generated by the metal plate to be formed interacts with the eddy current magnetic field generated by the induction block to generate mutually repulsive electromagnetic repulsive force, and the metal plate to be formed is deformed and attached to the round corners of the pressing plate under the action of the electromagnetic repulsive force to realize forming;
(2) In the formation of electromagnetic attractive force: the first power supply device and the second power supply device respectively discharge the metal plate to be formed and the induction block, the metal plate to be formed and the induction block flow through the same current and generate mutually attractive electromagnetic attraction force, and the metal plate to be formed is attached to the concave part of the positioning die through deformation under the action of the electromagnetic attraction force, so that forming is realized.
Compared with the prior art, the invention has the following effects:
(1) The invention has simple and reasonable structure, directly electrifies the metal plate, reduces the heating cost of the metal plate due to the heat effect of current and saves energy; in addition, the electrified metal plate can generate an electro-plastic effect, so that the deformation resistance is reduced, the plasticity is increased, and the metal plate is favorably formed;
(2) The conductive connector made of the copper sheet is erected on the metal sheet, so that the metal sheet and the lead can be well connected under the condition that the self structure of the metal sheet is not damaged, and the harm caused by ignition can be avoided;
(3) The invention can be used for forming the electromagnetic repulsive force of the metal plate, can also be used for forming the electromagnetic attractive force of the metal plate, and is convenient to use.
Description of the drawings:
FIG. 1 is a schematic view of a front view semi-sectional configuration of an embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention;
FIG. 3 is a schematic diagram of the current loop and electromagnetic force of the inductive block and sheet metal in the formation of an electromagnetic repulsive force;
FIG. 4 is a schematic diagram of the current loop and electromagnetic force of the inductor block and sheet metal in the formation of electromagnetic attractive force;
FIG. 5 is a schematic perspective view of a positioning die;
FIG. 6 is a schematic top view of a conductive contact;
fig. 7 is a schematic perspective view of a platen.
In the figure:
1-a substrate; 2-a sensing block; 201-blind holes; 3-positioning a die; 301-a recess; 4-a metal plate to be formed; a 5-conductive contact; 501-through holes; 6-pressing plates; 601-rounding; 602-a second mounting hole; 7-locking a bolt; 8-locking nuts; 9-a first power supply device; 901-a first power supply; 902-a first wire; 10-a second power supply device; 101-a second power supply; 102-a second wire.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 to 7, the electromagnetic forming device for metal plates of the present invention comprises a substrate 1, wherein an induction block 2, a positioning die 3 and a metal plate 4 to be formed are sequentially stacked from bottom to top in the middle of the upper surface of the substrate 1, the shape of the metal plate 4 to be formed corresponds to the shape of the positioning die 3, two ends of the metal plate 4 to be formed are respectively overlapped with conductive joints 5, a first power supply device 9 is connected between the conductive joints 5 at two ends, a pressing plate 6 is arranged on the upper surface of each conductive joint 5, and the pressing plate 6 is fixedly connected with the substrate 1; a second power supply device 10 is connected between the two ends of the induction block 2.
In this embodiment, a recess 301 for matching with the metal plate 4 to be formed in the formation of electromagnetic attraction force is provided in the middle of the upper surface of the positioning die 3. As shown in fig. 4, when the electromagnetic attraction force is formed, the first power supply device 9 and the second power supply device 10 discharge the metal plate material 4 to be formed and the induction block 2 respectively, and the current flowing through the metal plate material 4 to be formed is I 1 The current flowing through the induction block 2 is I 3 ，I 1 And I 3 The same direction, the same direction current will generate the attractive electromagnetic attraction force F as known by ampere law in physics 2 The metal sheet 4 to be formed is subjected to electromagnetic attraction force F 2 Under the action of the die, the metal plate blank is made to be matched with the concave part of the positioning die through deformation stages such as deep drawing, film sticking and the likeAnd (5) laminating to realize molding.
In this embodiment, the outer end of the pressing plate 6 presses the overlapping area of the conductive connector 5 and the metal plate 4 to be formed, and the lower part of the inner end is provided with a rounded corner 601 for matching with the metal plate 4 to be formed in the forming of electromagnetic repulsive force. As shown in fig. 3, when the electromagnetic repulsive force is formed, the first power supply 9 directly discharges the metal plate 4 to be formed, and the metal plate 4 to be formed has a current I 1 Flows through and generates a strong magnetic field, and the induction block 2 generates a magnetic field I under the action of the strong magnetic field 1 Induced current I in opposite directions 2 And generates an eddy magnetic field, and the strong magnetic field generated by the metal plate 4 to be formed interacts with the eddy magnetic field generated by the induction block to generate a mutually repulsive electromagnetic repulsive force F 1 The metal plate 4 to be formed is subjected to electromagnetic repulsive force F 1 Under the action of the pressure plate, the metal plate blank is attached to the round corner of the pressure plate through deformation stages such as bulging and die attaching, and the forming is realized.
In this embodiment, a through hole 501 is formed at one end of the conductive connector 5 away from the metal plate 4 to be formed; the wires at the two ends of the first power supply device 9 are respectively connected into the through holes on the conductive joints 5 at the two ends through bolts and nuts.
In this embodiment, the conductive connector 5 is made of a copper sheet. The conductive connector made of the copper sheet is erected on the metal sheet, so that the metal sheet and the lead can be well connected under the condition that the self structure of the metal sheet is not damaged, and the harm caused by ignition can be avoided.
In this embodiment, a blind hole 201 is formed at the left and right ends of the sensing block 2, and the wires at the two ends of the second power supply device 10 are respectively pressed into the blind hole 201 by screws.
In this embodiment, the sensing block 2 is made of copper.
In this embodiment, the substrate 1 and the positioning mold 3 are made of insulating materials, and when the electromagnetic repulsive force is formed, the positioning mold 3 is used only as an insulating plate, and has supporting and positioning effects. The metal plate to be formed is made of high-conductivity or low-conductivity materials, and the substrate is rectangular.
In this embodiment, first mounting holes are respectively formed at four corners of the substrate 1; second mounting holes 602 corresponding to the first mounting holes on the same side are respectively formed in the front and rear ends of the pressing plate 6, and the pressing plate 6 and the base plate 1 are locked in a matched mode through locking bolts 7 penetrating through the first mounting holes and the second mounting holes from bottom to top and locking nuts 8.
In this embodiment, the first power supply device 9 includes a first power supply 901, where the positive and negative electrodes of the first power supply 901 are respectively connected to a first wire 902, and the two first wires are respectively connected to through holes on conductive connectors at two ends by bolts and nuts, so as to realize conduction. The second power supply device 10 comprises a second power supply 101, the positive electrode and the negative electrode of the second power supply 101 are respectively connected with a second lead 102, and the two second leads are respectively pressed into blind holes at two ends of the induction block through screws to realize conduction.
The invention adopts another technical scheme that: an electromagnetic forming method for a metal plate comprises the following specific steps:
(1) Shaping of electromagnetic repulsive force: the first power supply device directly discharges the metal plate to be formed, the metal plate to be formed is electrified and generates a strong magnetic field, the induction block generates reverse current and generates an eddy current magnetic field under the action of the strong magnetic field, the strong magnetic field generated by the metal plate to be formed interacts with the eddy current magnetic field generated by the induction block to generate mutually repulsive electromagnetic repulsive force, and the metal plate to be formed is deformed and attached to the round corners of the pressing plate under the action of the electromagnetic repulsive force to realize forming;
(2) In the formation of electromagnetic attractive force: the first power supply device and the second power supply device respectively discharge the metal plate to be formed and the induction block, the metal plate to be formed and the induction block flow through the same current and generate mutually attractive electromagnetic attraction force, and the metal plate to be formed is attached to the concave part of the positioning die through deformation under the action of the electromagnetic attraction force, so that forming is realized.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. An electromagnetic forming device for a metal plate is characterized in that: the device comprises a substrate, wherein an induction block, a positioning die and a metal plate to be formed are sequentially overlapped from bottom to top in the middle of the upper surface of the substrate, the shape of the metal plate to be formed corresponds to that of the positioning die, conductive joints are respectively overlapped at two ends of the metal plate to be formed, a first power supply device is connected between the conductive joints at two ends, a pressing plate is arranged on the upper surface of each conductive joint, and the pressing plate is fixedly connected with the substrate; a second power supply device is connected between the two ends of the induction block;
the middle part of the upper surface of the positioning die is provided with a concave part matched with the metal plate to be formed in the forming process of electromagnetic attraction;
the outer side end of the pressing plate is pressed in the overlapping area of the conductive joint and the metal plate to be formed, and a rounding corner matched with the metal plate to be formed in the forming of electromagnetic repulsive force is arranged at the lower part of the inner side end.
2. An electromagnetic forming device for metal sheet according to claim 1, wherein: a through hole is formed in one end, far away from the metal plate to be formed, of the conductive connector; the wires at two ends of the first power supply device are connected into the through holes on the conductive joints at two ends through bolts and nuts respectively.
3. An electromagnetic sheet metal forming apparatus according to claim 1 or 2, wherein: the conductive joint is made of copper sheets.
4. An electromagnetic forming device for metal sheet according to claim 1, wherein: a blind hole is formed in the left end and the right end of the induction block respectively, and wires at the two ends of the second power supply device are pressed into the blind hole through screws respectively.
5. An electromagnetic sheet metal forming apparatus according to claim 1 or 4, wherein: the sensing block is made of copper.
6. An electromagnetic forming device for metal sheet according to claim 1, wherein: the base plate and the positioning die are both made of insulating materials; the metal sheet to be formed is a high-conductivity or low-conductivity material.
7. An electromagnetic forming device for metal sheet according to claim 1, wherein: the four corners of the substrate are respectively provided with first mounting holes; the front end and the rear end of the pressing plate are respectively provided with a second mounting hole corresponding to the first mounting hole positioned on the same side, and the pressing plate and the base plate are locked in a matched manner through a locking bolt and a locking nut which penetrate through the first mounting hole and the second mounting hole from bottom to top.
8. An electromagnetic forming method for a metal plate is characterized in that: an electromagnetic forming device for metal plates according to any one of claims 1 to 7, comprising the following specific steps:
(1) Shaping of electromagnetic repulsive force: the first power supply device directly discharges the metal plate to be formed, the metal plate to be formed is electrified and generates a strong magnetic field, the induction block generates reverse current and generates an eddy current magnetic field under the action of the strong magnetic field, the strong magnetic field generated by the metal plate to be formed interacts with the eddy current magnetic field generated by the induction block to generate mutually repulsive electromagnetic repulsive force, and the metal plate to be formed is deformed and attached to the round corners of the pressing plate under the action of the electromagnetic repulsive force to realize forming;
(2) In the formation of electromagnetic attractive force: the first power supply device and the second power supply device respectively discharge the metal plate to be formed and the induction block, the metal plate to be formed and the induction block flow through the same current and generate mutually attractive electromagnetic attraction force, and the metal plate to be formed is attached to the concave part of the positioning die through deformation under the action of the electromagnetic attraction force, so that forming is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810937509.7A CN109013821B (en) | 2018-08-17 | 2018-08-17 | Electromagnetic forming device and method for metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810937509.7A CN109013821B (en) | 2018-08-17 | 2018-08-17 | Electromagnetic forming device and method for metal plate |
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| Publication Number | Publication Date |
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| CN109013821A CN109013821A (en) | 2018-12-18 |
| CN109013821B true CN109013821B (en) | 2024-03-08 |
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| CN201810937509.7A Active CN109013821B (en) | 2018-08-17 | 2018-08-17 | Electromagnetic forming device and method for metal plate |
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| CN111659785B (en) * | 2020-06-12 | 2021-04-23 | 中南大学 | Multi-energy field composite punch-head-free rivet-free connecting device and method |
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| CN107127243A (en) * | 2017-06-20 | 2017-09-05 | 华中科技大学 | A kind of electromagnetic pulse forming device and method of sheet metal |
| CN108080482A (en) * | 2017-12-20 | 2018-05-29 | 广东工业大学 | A kind of stepped cylindrical member producing device and method based on the driving of multidirectional magnetic field force |
| CN208680297U (en) * | 2018-08-17 | 2019-04-02 | 福州大学 | A kind of sheet metal electromagnetic forming device |
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2018
- 2018-08-17 CN CN201810937509.7A patent/CN109013821B/en active Active
Patent Citations (8)
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| CN103394577A (en) * | 2013-08-15 | 2013-11-20 | 西北有色金属研究院 | Forming method of titanium alloy thin-walled casing |
| CN103962437A (en) * | 2014-05-19 | 2014-08-06 | 华中科技大学 | Metal material plastic forming method through electromagnetic force driving |
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| CN109013821A (en) | 2018-12-18 |
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