CN114769407B - Method and device for controlling simultaneous forming of pipe fitting and plate by adopting multi-bulge coil set - Google Patents
Method and device for controlling simultaneous forming of pipe fitting and plate by adopting multi-bulge coil set Download PDFInfo
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- CN114769407B CN114769407B CN202210422836.5A CN202210422836A CN114769407B CN 114769407 B CN114769407 B CN 114769407B CN 202210422836 A CN202210422836 A CN 202210422836A CN 114769407 B CN114769407 B CN 114769407B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a method for controlling simultaneous forming of pipe fittings and plate members by adopting a multi-bulge coil assembly, which comprises the following steps: determining the section shape of the coil group according to the forming specification of the workpiece formed simultaneously; manufacturing a multi-bulge coil set; the method comprises the steps that a workpiece to be formed is fixedly arranged at the inner side, the outer side, the upper end and the lower end of a multi-bulge coil set respectively; connecting the multi-bulge coil group to a pulse power supply through a discharge switch; and controlling a discharge switch to supply power to the multi-bulge coil assembly, and generating induced eddy currents in the pipe fitting and the plate to be formed, so that the pipe fitting at the inner side of the multi-bulge coil assembly is compressed, the pipe fitting at the outer side of the multi-bulge coil assembly is expanded, and the plate at the upper end and the lower end of the multi-bulge coil assembly is expanded. The invention also discloses a device for simultaneously forming the pipe fitting and the plate. The invention realizes simultaneous forming of pipe bulging, pipe compression and plate bulging, improves the forming efficiency of the workpiece by times, and ensures the forming quality of the pipe and the plate; the electric energy utilization rate of the driving coil in the workpiece forming process is improved, electromagnetic pollution is reduced, and the workpiece forming device is more energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the field of electromagnetic forming control of metal workpieces, and particularly relates to a method and a device for simultaneously forming a pipe fitting and a plate by adopting a multi-bulge coil set.
Background
The light weight is an important technical means for realizing energy conservation and emission reduction in the fields of aerospace, automobile industry and the like. Electromagnetic forming is a high-speed pulse forming technology, can greatly improve the forming performance of metal materials, and is an effective means for solving the forming difficulty of light alloy.
In the electromagnetic forming process, the energy initially input by the power supply is changed, and the energy acts on the workpiece to deform the workpiece, i.e. the electric energy is converted into shaping energy. In the electromagnetic forming process, the main energy loss is joule heat generated by coil heating, and studies have been conducted to find that electric energy stored in a charge capacitor as a pulse power source is only partially converted into forming energy of a workpiece, and the ratio of the forming energy of the workpiece to the electric energy in the charge capacitor is not more than 20%, and few studies on electromagnetic forming energy have been conducted in the current state.
The paper Study on the efficiency of Simultaneous Tube Compression and Expansion Electromagnetic Forming published in journal IEEE ACCESS discloses a double-tube electromagnetic forming method capable of simultaneously providing electromagnetic force for two tubes, respectively generating compression and bulging forming effects, and greatly improving forming efficiency compared with the traditional bulging forming method, wherein the method cannot realize simultaneous forming of the tubes and the plates. The Chinese patent with publication number of CN105880348B provides a high-efficiency electromagnetic forming method for plate, which connects the metal plates to be processed end to form a polygonal conductive loop, realizes simultaneous processing of a plurality of metal plates and improves electromagnetic forming efficiency. However, this method can only achieve simultaneous formation of multiple plates, and cannot achieve simultaneous formation of the pipe and the plates.
In summary, the prior art lacks an electromagnetic forming method and apparatus for simultaneously forming a tube and a plate.
Disclosure of Invention
The invention aims at solving the problems and providing a method and a device for simultaneously forming and controlling pipe fittings and plate members by adopting a multi-bulge coil assembly, wherein the multi-bulge coil assembly is provided with an upper bulge, a lower bulge, an outer bulge and an inner bulge, the pipe fittings to be formed are arranged in and outside the multi-bulge coil assembly, the plate members to be formed are arranged at the upper end and the lower end of the multi-bulge coil assembly, the upper bulge of the multi-bulge coil assembly increases the axial electromagnetic force of the upper end plate member of the coil assembly, the lower bulge of the multi-bulge coil assembly increases the axial electromagnetic force of the lower end plate member of the coil assembly, the outer bulge of the multi-bulge coil assembly increases the radial electromagnetic force of the pipe fittings outside the coil assembly, the inner bulge of the multi-bulge coil assembly increases the radial electromagnetic force of the pipe fittings inside the coil assembly, and the simultaneous forming of pipe fitting bulging, pipe fitting compression and double plate member bulging are realized, and the workpiece forming efficiency is improved.
The technical scheme of the invention is that a control method for simultaneously forming pipe fittings and plate members of a multi-bulge coil assembly is adopted, the multi-bulge coil assembly is provided with more than two or all of an upper bulge, a lower bulge, an outer bulge and an inner bulge, the upper bulge of the multi-bulge coil assembly is used for increasing the axial electromagnetic force of the plate members at the upper end of the coil assembly, the lower bulge of the multi-bulge coil assembly is used for increasing the axial electromagnetic force of the plate members at the lower end of the coil assembly, the outer bulge of the multi-bulge coil assembly is used for increasing the radial electromagnetic force of the pipe fittings at the outer side of the coil assembly, and the inner bulge of the multi-bulge coil assembly is used for increasing the radial electromagnetic force of the pipe fittings at the inner side of the coil assembly.
The technical scheme of the invention is that the method for controlling the simultaneous forming of the pipe fitting and the plate by adopting the multi-bulge coil assembly comprises the following steps:
step 1: determining parameters of the driving coil group and the section shape of the coil group according to the number of the simultaneously formed pipe fittings and the plate members and the forming specifications of the pipe fittings and the plate members;
step 2: manufacturing a multi-bulge coil set according to the driving coil set parameters and the section shape determined in the step 1;
step 3: the method comprises the steps that a workpiece to be formed is fixedly arranged at the inner side, the outer side, the upper end and the lower end of a multi-bulge coil set respectively;
step 3.1: placing the pipe fitting to be formed on the inner side and the outer side of the multi-bulge coil group;
step 3.2: placing a plate to be formed on the upper end and the lower end of the multi-bulge coil group;
step 4: connecting the multi-bulge coil group to a pulse power supply through a discharge switch;
step 5: and controlling a discharge switch to supply power to the multi-bulge coil assembly, and generating induced eddy currents in the pipe fitting and the plate to be formed, so that the pipe fitting at the inner side of the multi-bulge coil assembly is compressed, the pipe fitting at the outer side of the multi-bulge coil assembly is expanded, and the plate at the upper end and the lower end of the multi-bulge coil assembly is expanded.
Preferably, the spacing between the plate to be formed and the multi-bulge coil set, which are placed at the upper end and the lower end of the multi-bulge coil set, is less than 1mm, so that the plate forming efficiency is improved.
Preferably, the difference between the inner diameter of the pipe to be formed placed outside the multi-bulge coil assembly and the outer diameter of the multi-bulge coil assembly is not more than 2mm, so as to improve the pipe bulging efficiency.
Preferably, the difference between the outer diameter of the tube to be formed placed inside the multi-salient coil group and the inner diameter of the multi-salient coil group is not more than 2mm, so as to improve the compression efficiency of the tube.
Preferably, the pulse width of the discharge of the pulse power supply is 50-1000 mus.
The double-pipe fitting and double-plate simultaneous forming device comprises a multi-bulge coil set, an air switch and a pulse power supply, wherein the multi-bulge coil set is provided with an upper bulge, a lower bulge, an outer bulge and an inner bulge, the cross section of the multi-bulge coil set is cross-shaped, a pipe fitting to be expanded is arranged on the outer side of the multi-bulge coil set, a pipe fitting to be compressed is arranged on the inner side of the multi-bulge coil set, and the central lines of the pipe fitting to be expanded and the pipe fitting to be compressed are aligned with the central line of the multi-bulge coil set; the first plate to be formed is arranged at the upper end of the multi-bulge coil group, and the second plate to be formed is arranged at the lower end of the multi-bulge coil group; the multi-bulge coil set is connected with a pulse power supply through an air switch.
Compared with the prior art, the invention has the beneficial effects that:
1) The control method for simultaneously forming the pipe fitting and the plate realizes the simultaneous forming of pipe fitting bulging, pipe fitting compression and plate bulging, improves the forming efficiency of the workpiece by times, and ensures the forming quality of the pipe fitting and the plate;
2) The invention realizes the simultaneous forming control of the double plates and the pipe fitting, can lead the two formed plates to reach different forming specifications, and can meet the diversified plate forming requirements;
3) The method improves the electric energy utilization rate of the driving coil in the workpiece forming process, reduces electromagnetic pollution, and is more energy-saving and environment-friendly;
4) The single-plate and double-pipe simultaneous forming device realizes the simultaneous forming control of the single-plate and the double-pipe;
5) The device for simultaneously forming the single pipe fitting and the double plates realizes the simultaneous forming of pipe bulging and two plate bulging;
6) The device for simultaneously forming the single pipe fitting and the double plates realizes simultaneous forming of pipe fitting compression and two plate bulging;
7) The pipe fitting and plate simultaneous forming device realizes simultaneous forming of pipe fitting bulging and plate bulging;
8) The device for simultaneously forming the pipe fitting and the plate realizes the simultaneous forming of the compression of the pipe fitting and the bulging of the plate.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic circuit connection diagram of a multi-workpiece forming apparatus according to an embodiment of the invention.
Fig. 2 is a schematic view of a dual tube and dual panel simultaneous forming apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic view of a double pipe and plate simultaneous forming apparatus of the second embodiment.
Fig. 4 is a schematic view of a double tube and plate simultaneous forming apparatus of the third embodiment.
Fig. 5 is a schematic view of a double plate and tube simultaneous forming apparatus of the fourth embodiment.
Fig. 6 is a schematic view of a double plate and tube simultaneous forming apparatus of the fifth embodiment.
Fig. 7 is a schematic view of a pipe and plate simultaneous forming apparatus of a sixth embodiment.
Fig. 8 is a schematic view of a pipe and plate simultaneous forming apparatus of a seventh embodiment.
Fig. 9 is a schematic view of a pipe and plate simultaneous forming apparatus of the eighth embodiment.
Fig. 10 is a schematic view of a pipe and plate simultaneous forming apparatus of a ninth embodiment.
Detailed Description
Example 1
The method for controlling simultaneous forming of the pipe fitting and the plate by adopting the multi-bulge coil group comprises the following steps:
step 1: establishing a workpiece electromagnetic forming model comprising a driving coil, a pipe fitting to be formed and a plate to be formed by utilizing finite element software, simulating pipe fitting and plate forming by utilizing the workpiece electromagnetic forming model, and adjusting parameters of a driving coil set and the section shape of the coil set according to the simulated pipe fitting and plate forming effect to enable the simulated pipe fitting and plate forming to meet the forming specification requirement;
the section of the driving coil group is cross-shaped, T-shaped or L-shaped;
step 2: manufacturing a multi-bulge coil set according to the driving coil set parameters and the section shape determined in the step 1;
step 3: the method comprises the steps that a workpiece to be formed is fixedly arranged at the inner side, the outer side, the upper end and the lower end of a multi-bulge coil set respectively;
step 3.1: placing the pipe fitting to be formed on the inner side and the outer side of the multi-bulge coil group;
step 3.2: placing the plate to be formed on the upper end and the lower end of the multi-bulge coil group, and fixing the edge of the plate to be formed by adopting a blank holder;
step 4: connecting the multi-bulge coil group to a pulse power supply through a discharge switch;
step 5: and controlling a discharge switch to supply power to the multi-bulge coil assembly, and generating induced eddy currents in the pipe fitting and the plate to be formed, so that the pipe fitting at the inner side of the multi-bulge coil assembly is compressed, the pipe fitting at the outer side of the multi-bulge coil assembly is expanded, and the plate at the upper end and the lower end of the multi-bulge coil assembly is expanded.
The double-pipe and double-plate simultaneous forming device comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1, a lower bulge 1.2, an outer bulge 1.3 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is in a cross shape, a pipe fitting 2 to be expanded is arranged outside the multi-bulge coil group 1, a pipe fitting 3 to be compressed is arranged inside the multi-bulge coil group 1, and the central lines of the pipe fitting 2 to be expanded and the pipe fitting 3 to be compressed are aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1, and the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch, as shown in figure 1, a diodeV d And a resistorR d The formed follow current loop is connected with the pulse power supply in parallel, and the follow current loop is used for reducing heat accumulation of the forming device and prolonging the service lives of the pulse power supply and the driving coil.
The first plate 4 to be formed and the second plate 5 to be formed in the embodiment are circular, and the central lines of the first plate 4 to be formed and the second plate 5 to be formed are aligned with the central line of the multi-bulge coil set 1.
In the embodiment, the distances between the first plate 4 to be formed, the second plate 5 to be formed and the multi-protrusion coil assembly 1 are all 1mm. The difference between the inner diameter of the pipe fitting 2 to be expanded and the outer diameter of the multi-bulge coil group 1 is 2mm. The difference between the outer diameter of the tube 3 to be compressed and the inner diameter of the multi-bulge coil group 1 is 2mm. The discharge pulse width of the pulse power supply of the example was 100 mus.
As shown in fig. 2, when the multi-bulge coil set 1 is electrified, a counterclockwise pulse current is formed in the multi-bulge coil set 1, a clockwise induced vortex is generated in the pipe fitting 2 to be expanded, the induced vortex of the pipe fitting 2 to be expanded and the magnetic field thereof interact with the pulse current and the magnetic field thereof in the multi-bulge coil set 1, so that the pipe fitting 2 to be expanded is subjected to a radial outward electromagnetic force, and the pipe fitting 2 to be expanded is expanded under the radial outward electromagnetic force; the pipe fitting 3 to be compressed generates clockwise induced vortex, the induced vortex and the magnetic field of the pipe fitting 3 to be compressed interact with the pulse current and the magnetic field of the pulse current in the multi-bulge coil group 1, so that the pipe fitting 3 to be compressed is subjected to radial inward electromagnetic force, and the pipe fitting 3 to be compressed is compressed and formed under the action of the radial inward electromagnetic force; the first plate 4 to be formed generates clockwise induced eddy current, the induced eddy current and the magnetic field of the first plate 4 to be formed interact with the pulse current and the magnetic field of the pulse current in the multi-bulge coil group 1, so that the first plate 4 to be formed is subjected to axial upward electromagnetic force, and the first plate 4 to be formed expands upwards under the action of the axial upward electromagnetic force; the second plate 5 to be formed generates clockwise induced eddy current, and the induced eddy current and the magnetic field of the second plate 5 to be formed interact with the pulse current and the magnetic field of the pulse current in the multi-bulge coil assembly 1 to enable the second plate 4 to be formed to be subjected to axial downward electromagnetic force, and the second plate 5 to be formed expands downwards under the action of the axial downward electromagnetic force.
In the embodiment, the first plate 4 to be formed and the second plate 5 to be formed are expanded into basin-shaped pieces.
Example two
As shown in fig. 3, the device for simultaneously forming the double pipe fittings and the plate comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1, an outer bulge 1.3 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is in a convex shape, a pipe fitting to be expanded 2 is arranged outside the multi-bulge coil group 1, a pipe fitting to be compressed 3 is arranged inside the multi-bulge coil group 1, and the central lines of the pipe fitting to be expanded 2 and the pipe fitting to be compressed 3 are aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example III
As shown in fig. 4, the device for simultaneously forming the double pipe fittings and the plate comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with a lower bulge 1.2, an outer bulge 1.3 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is T-shaped, a pipe fitting 2 to be expanded is arranged outside the multi-bulge coil group 1, a pipe fitting 3 to be compressed is arranged inside the multi-bulge coil group 1, and the central lines of the pipe fitting 2 to be expanded and the pipe fitting 3 to be compressed are aligned with the central line of the multi-bulge coil group 1; the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example IV
As shown in fig. 5, the device for simultaneously forming the double plates and the pipe fitting comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1, a lower bulge 1.2 and an outer bulge 1.3, the cross section of the multi-bulge coil group 1 is T-shaped, the pipe fitting 2 to be expanded is arranged outside the multi-bulge coil group 1, and the central line of the pipe fitting 2 to be expanded is aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1, and the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example five
As shown in fig. 6, the device for simultaneously forming the double plate and the pipe comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1, a lower bulge 1.23 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is T-shaped, the pipe 3 to be compressed is arranged on the inner side of the multi-bulge coil group 1, and the central line of the pipe 3 to be compressed is aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1, and the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example six
As shown in fig. 7, the pipe fitting and plate simultaneous forming device comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1 and a lower bulge 1.3, the cross section of the multi-bulge coil group 1 is L-shaped, a pipe fitting 2 to be expanded is arranged outside the multi-bulge coil group 1, and the central line of the pipe fitting 2 to be expanded is aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example seven
As shown in fig. 8, the pipe fitting and plate simultaneous forming device comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with an upper bulge 1.1 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is L-shaped, a pipe fitting 3 to be compressed is arranged on the inner side of the multi-bulge coil group 1, and the central line of the pipe fitting 3 to be compressed is aligned with the central line of the multi-bulge coil group 1; the first plate 4 to be formed is arranged at the upper end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example eight
As shown in fig. 9, the device for simultaneously forming the pipe fitting and the plate comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with a lower bulge 1.2 and an outer bulge 1.3, the cross section of the multi-bulge coil group 1 is L-shaped, the pipe fitting 2 to be expanded is arranged outside the multi-bulge coil group 1, and the central lines of the pipe fitting 2 to be expanded are aligned with the central lines of the multi-bulge coil group 1; the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Example nine
As shown in fig. 10, the device for simultaneously forming the pipe fitting and the plate comprises a multi-bulge coil group 1, an air switch and a pulse power supply, wherein the multi-bulge coil group 1 is provided with a lower bulge 1.2 and an inner bulge 1.4, the cross section of the multi-bulge coil group 1 is L-shaped, the pipe fitting 3 to be compressed is arranged on the inner side of the multi-bulge coil group 1, and the central lines of the pipe fitting 3 to be compressed are aligned with the central lines of the multi-bulge coil group 1; the second plate 5 to be formed is arranged at the lower end of the multi-bulge coil group 1; the multi-bulge coil group 1 is connected with a pulse power supply through an air switch.
Claims (5)
1. The method is characterized in that the multi-bulge coil set is provided with more than two of an upper bulge, a lower bulge, an outer bulge and an inner bulge, wherein the upper bulge of the multi-bulge coil set is used for increasing the axial electromagnetic force of the upper end plate of the coil set, the lower bulge of the multi-bulge coil set is used for increasing the axial electromagnetic force of the lower end plate of the coil set, the outer bulge of the multi-bulge coil set is used for increasing the radial electromagnetic force of the outer pipe of the coil set, and the inner bulge of the multi-bulge coil set is used for increasing the radial electromagnetic force of the inner pipe of the coil set;
the method comprises the following steps:
step 1: determining parameters of the driving coil group and the section shape of the driving coil group according to the number of the simultaneously formed pipe fittings and the plate members and the forming specifications of the pipe fittings and the plate members;
step 2: manufacturing a multi-bulge coil set according to the driving coil set parameters and the section shape determined in the step 1;
step 3: the method comprises the steps that a workpiece to be formed is fixedly arranged at the inner side, the outer side, the upper end and the lower end of a multi-bulge coil set respectively;
step 3.1: placing the pipe fitting to be formed on the inner side and the outer side of the multi-bulge coil group;
step 3.2: placing a plate to be formed on the upper end and the lower end of the multi-bulge coil group;
step 4: connecting the multi-bulge coil group to a pulse power supply through a discharge switch;
step 5: and controlling a discharge switch to supply power to the multi-bulge coil assembly, and generating induced eddy currents in the pipe fitting and the plate to be formed, so that the pipe fitting at the inner side of the multi-bulge coil assembly is compressed, the pipe fitting at the outer side of the multi-bulge coil assembly is expanded, and the plate at the upper end and the lower end of the multi-bulge coil assembly is expanded.
2. The method according to claim 1, wherein the spacing between the plate to be formed placed on the upper and lower ends of the multi-bulge coil set and the multi-bulge coil set is 1mm or less, so as to improve the plate forming efficiency.
3. The method according to claim 1, wherein a difference between an inner diameter of the pipe to be formed placed outside the multi-bulge coil set and an outer diameter of the multi-bulge coil set is not more than 2mm to improve pipe bulging efficiency.
4. The method for simultaneous forming control of pipe and plate according to claim 1, wherein the pulse width of the discharge of the pulse power source is 50-1000 μs.
5. A simultaneous tube and plate forming apparatus according to any one of claims 1-4, comprising a multi-bulge coil assembly (1), an air switch and a pulse power source, the multi-bulge coil assembly (1) having an upper bulge (1.1) and an outer bulge (1.3), the multi-bulge coil assembly (1) being L-shaped in cross section, the tube (2) to be expanded being arranged outside the multi-bulge coil assembly (1), the center line of the tube (2) to be expanded being aligned with the center line of the multi-bulge coil assembly (1); the first plate (4) to be formed is arranged at the upper end of the multi-bulge coil group (1); the multi-bulge coil group (1) is connected with a pulse power supply through an air switch.
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| CN202210422836.5A CN114769407B (en) | 2022-04-21 | 2022-04-21 | Method and device for controlling simultaneous forming of pipe fitting and plate by adopting multi-bulge coil set |
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| CN202210422836.5A CN114769407B (en) | 2022-04-21 | 2022-04-21 | Method and device for controlling simultaneous forming of pipe fitting and plate by adopting multi-bulge coil set |
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| CN114769407B true CN114769407B (en) | 2024-03-29 |
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| CN102744310A (en) * | 2012-07-11 | 2012-10-24 | 哈尔滨工业大学 | Magnetic pulse forming device and method of bimetal composite pipe |
| CN104874664A (en) * | 2015-04-24 | 2015-09-02 | 福州大学 | Alloy pipe fitting electromagnetic bulging and flanging synchronous forming device and method |
| CN106853474A (en) * | 2015-12-08 | 2017-06-16 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of collection chinaware device for uniform pressure coil |
| 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 |
| CN108188246A (en) * | 2018-02-09 | 2018-06-22 | 华中科技大学 | A kind of metal tube building mortion and method based on through-flow pattern |
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