Pipe fitting and plate forming method and device adopting magnetic collector shaped like Chinese character'tu '

Abstract

The invention relates to a pipe fitting and plate forming method adopting a magnetic collector shaped like a Chinese character'tu ', which comprises the following steps of: manufacturing the annular magnetic collector shaped like the Chinese character'tu' with a coil accommodating cavity, and placing a driving coil in the coil accommodating cavity; workpieces to be formed are arranged and fixed on the upper side, the lower side, the inner side and the outer side of the magnetic collector respectively; connecting the driving coil to a pulse power supply through a discharge switch; and the discharge switch is controlled to supply power to the driving coil, and induced eddy current is generated in the to-be-formed pipe fitting and the to-be-formed plate to enable the pipe fitting and the plate to deform, so that the forming specification is achieved. The invention further discloses a device for simultaneously forming various pipe fittings and plates. According to the invention, simultaneous forming of pipe fitting bulging, pipe fitting compression and plate fitting bulging is realized, the workpiece forming efficiency is multiplied, electromagnetic radiation to the environment in the workpiece electromagnetic forming process is reduced, and the device is more energy-saving and environment-friendly.

Description

Technical Field

[0001] The invention belongs to the field of electromagnetic forming of metal workpieces, and in particular relates to a method and device for forming pipes and plates using a U-shaped magnetic collector. Background Art

[0002] Lightweighting is a key technological approach to achieving energy conservation and emission reduction in sectors such as aerospace and automotive. Electromagnetic forming, a high-rate pulse forming technology, can significantly improve the forming properties of metal materials and is an effective means of addressing the difficulties faced in forming lightweight alloys.

[0003] During the electromagnetic forming process, the energy initially input by the power supply undergoes a transformation. This energy acts on the workpiece, causing it to deform, converting electrical energy into shaping energy. The primary energy loss in the electromagnetic forming process is Joule heat generated by the coil heating. Studies have found that only a portion of the electrical energy stored in the charging capacitor, which serves as a pulse power source, is converted into workpiece forming energy. The ratio of workpiece shaping energy to the electrical energy in the charging capacitor does not exceed 20%. Currently, very little research has examined the energy consumption of electromagnetic forming.

[0004] The paper "Study on the efficiency of SimultaneousTube Compression and Expansion Electromagnetic Forming" published in the journal "IEEE ACCESS" discloses a method for electromagnetic forming of dual tubes. It can provide electromagnetic force to two tubes at the same time, and respectively produce compression and expansion forming effects, and the forming efficiency is greatly improved compared to traditional expansion. This method cannot achieve the simultaneous forming of tubes and plates. The Chinese patent "A High-efficiency Plate Electromagnetic Forming Method and Device" with publication number CN105880348B provides a high-efficiency plate electromagnetic forming method, which connects the metal plates to be processed end to end to form a polygonal conductive loop, realizing the simultaneous processing of multiple metal plates and improving the efficiency of electromagnetic forming. However, this method can only achieve the simultaneous forming of multiple plates, and cannot achieve the simultaneous forming of tubes and plates.

[0005] In summary, the prior art lacks an electromagnetic forming method and device for simultaneously forming pipes and plates. Summary of the Invention

[0006] The object of the present invention is to address the above problems and provide a method and device for forming pipe fittings and plate parts using a T-shaped magnetic concentrator. Among the outer protrusion, inner protrusion, upper protrusion, and lower protrusion of the T-shaped magnetic concentrator, three of them are used. The outer protrusion increases the radial electromagnetic force of the pipe fitting on the outer side of the T-shaped magnetic concentrator, the inner protrusion of the T-shaped magnetic concentrator increases the radial electromagnetic force of the pipe fitting on the inner side of the T-shaped magnetic concentrator, the upper protrusion of the T-shaped magnetic concentrator increases the axial electromagnetic force of the plate part at the upper end of the T-shaped magnetic concentrator, and the lower protrusion of the T-shaped magnetic concentrator increases the axial electromagnetic force of the plate part at the lower end of the T-shaped magnetic concentrator, so as to achieve the simultaneous processing and forming of double pipe fittings and plate parts or the simultaneous processing and forming of double plate parts and pipe fittings, improving the forming efficiency of workpieces and the utilization rate of electric energy.

[0007] The technical solution of the present invention is a method for forming pipe fittings and plate parts using a T-shaped magnetic concentrator, including the following steps: Step 1: Fabricate a circular T-shaped magnetic concentrator with a coil cavity, and place a driving coil in the coil cavity; Step 2: Set and fix the pipe fittings and plate parts to be formed on the upper, lower, inner, and outer sides of the T-shaped magnetic concentrator; Step 2.1: Place the pipe fittings to be formed on the inner and outer sides of the T-shaped magnetic concentrator and fix them; Step 2.2: Place the plate parts to be formed on the upper and lower sides of the T-shaped magnetic concentrator and fix them; Step 3: Connect the driving coil to a pulse power supply via a discharge switch; Step 4: Control the discharge switch to supply power to the driving coil, generating induced eddy currents in the pipe fittings and plate parts to be formed, causing the pipe fittings and plate parts to deform and reach the forming specifications; Step 5: Determine whether the pipe fittings and plate parts to be formed reach the forming specifications respectively. If there are pipe fittings or plate parts that do not reach the forming specifications, remove the pipe fittings and plate parts that reach the forming specifications, and repeat Steps 3 and / or 4 for the pipe fittings or plate parts that do not reach the forming specifications until they reach the forming specifications.

[0008] Preferably, the T-shaped magnetic concentrator is divided into upper and lower parts to facilitate the placement or removal of the driving coil. Preferably, a device for the method of forming pipe fittings and plate parts using a T-shaped magnetic concentrator includes a T-shaped magnetic concentrator, a driving coil, and a pulse power supply. The T-shaped magnetic concentrator includes an outer convex ring, an inner convex ring, and an upper convex ring. The T-shaped magnetic concentrator is provided with a coil cavity and a through hole for placing the pipe fittings to be formed. The side wall of the T-shaped magnetic concentrator is provided with a slit. The cross-section of the T-shaped magnetic concentrator is T-shaped. The driving coil is placed in the coil cavity. The driving coil is connected to the pulse power supply via a discharge switch. The device realizes the simultaneous processing and forming of double pipe fittings and plate parts.

[0009] Preferably, a device for a forming method of pipe fittings and plate parts using a T-shaped magnetic concentrator includes a T-shaped magnetic concentrator, a driving coil, and a pulse power supply. The T-shaped magnetic concentrator includes an outer convex ring, an inner convex ring, and a lower convex ring. The T-shaped magnetic concentrator is provided with a coil cavity and a through hole for placing the pipe fitting to be formed. The side wall of the T-shaped magnetic concentrator is provided with a slit. The cross section of the T-shaped magnetic concentrator is T-shaped. The driving coil is placed in the coil cavity. The driving coil is connected to the pulse power supply through a discharge switch. The device realizes the simultaneous processing and forming of double pipe fittings and plate parts.

[0010] Preferably, a device for a forming method of pipe fittings and plate parts using a T-shaped magnetic concentrator includes a T-shaped magnetic concentrator, a driving coil, and a pulse power supply. The T-shaped magnetic concentrator includes an inner convex ring, an upper convex ring, and a lower convex ring. The T-shaped magnetic concentrator is provided with a coil cavity and a through hole for placing the pipe fitting to be formed. The side wall of the T-shaped magnetic concentrator is provided with a slit. The cross section of the T-shaped magnetic concentrator is T-shaped. The driving coil is placed in the coil cavity. The driving coil is connected to the pulse power supply through a discharge switch. The device realizes the simultaneous processing and forming of double plate parts and pipe fittings.

[0011] Preferably, a device for a forming method of pipe fittings and plate parts using a T-shaped magnetic concentrator includes a T-shaped magnetic concentrator, a driving coil, and a pulse power supply. The T-shaped magnetic concentrator includes an inner convex ring, an upper convex ring, and a lower convex ring. The T-shaped magnetic concentrator is provided with a coil cavity and a through hole for placing the pipe fitting to be formed. The side wall of the T-shaped magnetic concentrator is provided with a slit. The cross section of the T-shaped magnetic concentrator is T-shaped. The driving coil is placed in the coil cavity. The driving coil is connected to the pulse power supply through a discharge switch. The device realizes the simultaneous processing and forming of double plate parts and pipe fittings.

[0012] Compared with the prior art, the beneficial effects of the present invention include: 1) By using a T-shaped magnetic concentrator, the present invention realizes the simultaneous forming of pipe fitting bulging, pipe fitting compression, and plate part bulging,成倍提高了工件成形效率,并减少了工件电磁成形工艺过程中对环境的电磁辐射,更节能环保。doubles the workpiece forming efficiency and reduces the electromagnetic radiation to the environment during the electromagnetic forming process of the workpiece, making it more energy-saving and environmentally friendly.

[0013] 2) The present invention realizes the simultaneous forming control of double plate parts and pipe fittings, and enables the two formed plate parts to reach different forming specifications, meeting the diversified forming requirements of plate parts.

[0014] 3) The plate part and double pipe fitting simultaneous forming device of the present invention realizes the simultaneous forming control of a single plate part and double pipe fittings.

[0015] 4) The magnetic concentrator of the present invention is easy to produce and manufacture, with low cost, which is conducive to large-area popularization and use. Description of the Drawings

[0016] The following further illustrates the present invention with reference to the drawings and embodiments.

[0017] It should be noted that the Chinese expression "成倍提高了工件成形效率" in item 11 of the original text seems to be an incorrect or incomplete expression. I have tried my best to translate it according to the context, but it may need to be further verified according to the actual situation.Figure 1 Schematic cross-sectional view of a magnetic collector with multiple protrusions.

[0018] Figure 2 Schematic diagram of the circuit connection of the forming device according to an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of a device for simultaneously forming a pipe fitting and a plate in Embodiment 1.

[0020] Figure 4 Schematic diagram of a device for simultaneously forming a pipe fitting and a plate in Embodiment 2.

[0021] Figure 5 Schematic diagram of a device for simultaneously forming a pipe fitting and a plate in Embodiment 3.

[0022] Figure 6 Schematic diagram of a device for simultaneously forming a pipe fitting and a plate in Embodiment 4. Detailed implementation manners ​​​​​​​​​​​​​​​​​​​​​​Step 5: Determine whether the to-be-formed pipe fittings and plate are up to the forming specifications respectively. If there are pipe fittings or plate that do not meet the forming specifications, remove the pipe fittings and plate that meet the forming specifications, and repeat Steps 3 and 4 for the pipe fittings or plate that do not meet the forming specifications until they meet the forming specifications.

[0025] As Figure 3 shown, the double pipe fitting and plate simultaneous forming device includes a soil-shaped magnetic collector 2, a drive coil 1 and a pulse power supply. The soil-shaped magnetic collector includes an outer convex ring 2.1, an inner convex ring 2.2 and an upper convex ring 2.3. The magnetic collector is provided with a coil cavity 2.5 and a through hole 2.6 for placing the to-be-formed pipe fitting. The side wall of the magnetic collector is provided with a slit 2.7. The cross-section of the magnetic collector is soil-shaped. The drive coil 1 is placed in the coil cavity 2.5, and the drive coil 1 is connected to the pulse power supply through a discharge switch. As Figure 2 shown.

[0026] In the embodiment, the simultaneous processing and forming of 2 pipe fittings and 1 plate are realized, and the plate is bulged into a basin-shaped part.

[0027] Embodiment 2 The pipe fitting and plate forming method using a soil-shaped magnetic collector includes the following steps: Step 1: Make a circular soil-shaped magnetic collector with a coil cavity, and place a drive coil in the coil cavity; Step 2: Set and fix the to-be-formed pipe fittings and to-be-formed plate on the lower side, inside and outside of the soil-shaped magnetic collector; Step 2.1: Set the to-be-formed pipe fittings on the inside and outside of the soil-shaped magnetic collector and fix them; Step 2.2: Set the to-be-formed plate on the lower side of the soil-shaped magnetic collector and fix it; Step 3: Connect the drive coil to the pulse power supply through a discharge switch; Step 4: Control the discharge switch to supply power to the drive coil, generate induced eddy currents in the to-be-formed pipe fittings and plate, and cause the pipe fittings and plate to deform until they meet the forming specifications; Step 5: Determine whether the to-be-formed pipe fittings and plate are up to the forming specifications respectively. If there are pipe fittings or plate that do not meet the forming specifications, remove the pipe fittings and plate that meet the forming specifications, and repeat Steps 3 and 4 for the pipe fittings or plate that do not meet the forming specifications until they meet the forming specifications.

[0028] As Figure 4As shown in the figure, a simultaneous forming device for double pipe fittings and plate parts includes a soil-shaped magnetic collector 2, a driving coil 1, and a pulse power supply. The multi-protrusion annular magnetic collector includes an outer convex ring 2.1, an inner convex ring 2.2, and a lower convex ring 2.4. The magnetic collector is provided with a coil cavity 2.5 and a through hole 2.6 for placing the pipe fitting to be formed. The side wall of the magnetic collector is provided with a slit 2.7. The cross section of the magnetic collector is soil-shaped. The driving coil 1 is placed in the coil cavity 2.5, and the driving coil 1 is connected to the pulse power supply through a discharge switch.

[0029] In the embodiment, the simultaneous processing and forming of two pipe fittings and one plate part are realized.

[0030] Embodiment Three A forming method for pipe fittings and plate parts using a soil-shaped magnetic collector includes the following steps: Step 1: Manufacture a circular soil-shaped magnetic collector with a coil cavity, and place a driving coil in the coil cavity; Step 2: Set and fix the pipe fitting to be formed and the plate part to be formed on the outer side, upper side, and lower side of the soil-shaped magnetic collector; Step 2.1: Set the pipe fitting to be formed on the outer side of the soil-shaped magnetic collector and fix it; Step 2.2: Set the plate part to be formed on the upper and lower sides of the soil-shaped magnetic collector and fix it; Step 3: Connect the driving coil to the pulse power supply through a discharge switch; Step 4: Control the discharge switch, supply power to the driving coil, generate induced eddy currents in the pipe fitting to be formed and the plate part, and cause the pipe fitting and the plate part to deform to reach the forming specifications; Step 5: Respectively judge whether the pipe fitting to be formed and the plate part reach the forming specifications. If there is a pipe fitting or a plate part that does not reach the forming specifications, remove the pipe fitting and the plate part that reach the forming specifications, and repeat Steps 3 and 4 for the pipe fitting or the plate part that does not reach the forming specifications until it reaches the forming specifications.

[0031] As Figure 5 As shown in the figure, a simultaneous forming device for double plate parts and pipe fittings includes a soil-shaped magnetic collector 2, a driving coil 1, and a pulse power supply. The soil-shaped magnetic collector includes an outer convex ring 2.1, an upper convex ring 2.3, and a lower convex ring 2.4. The magnetic collector is provided with a coil cavity 2.5 and a through hole 2.6 for placing the pipe fitting to be formed. The side wall of the magnetic collector is provided with a slit 2.7. The cross section of the magnetic collector is soil-shaped. The driving coil 1 is placed in the coil cavity 2.5, and the driving coil 1 is connected to the pulse power supply through a discharge switch.

[0032] In the embodiment, the simultaneous processing and forming of two plate parts and one pipe fitting are realized, and both of the two plate parts are expanded into basin-shaped parts.

[0033] Embodiment Four A forming method for pipe fittings and plate parts using a soil-shaped magnetic collector includes the following steps: Step 1: Make a circular earth-shaped magnetic collector with a coil cavity, and place the driving coil in the coil cavity; Step 2: Arrange and fix the pipe and plate to be formed on the inner side, upper side, and lower side of the earth-shaped magnetic collector; Step 2.1: Place the pipe to be formed inside the earth-shaped magnetic collector and fix it; Step 2.2: Place the plate to be formed on the upper and lower sides of the earth-shaped magnetic collector and fix them; Step 3: Connect the driving coil to the pulse power supply via the discharge switch; Step 4: Control the discharge switch to power the drive coil, generate induced eddy currents in the pipe or plate to be formed, and deform the pipe or plate to meet the forming specifications; Step 5: Determine whether the pipes and plates to be formed meet the forming specifications. If there are pipes or plates that do not meet the forming specifications, remove the pipes and plates that meet the forming specifications, and repeat steps 3 and 4 for the pipes or plates that do not meet the forming specifications until they meet the forming specifications.

[0034] like Figure 6 As shown, a device for simultaneously forming double plates and pipes includes a U-shaped magnetic collector 2, a driving coil 1 and a pulse power supply. The U-shaped magnetic collector includes an inner convex ring 2.2, an upper convex ring 2.3 and a lower convex ring 2.4. The magnetic collector is provided with a coil cavity 2.5 and a through hole 2.6 for placing the pipe to be formed. The side wall of the magnetic collector is provided with a slit 2.7. The cross-section of the magnetic collector is U-shaped. The driving coil 1 is placed in the coil cavity 2.5, and the driving coil 1 is connected to the pulse power supply via a discharge switch.

[0035] In the embodiment, two plates and one pipe are processed and formed simultaneously.

Claims

1. A method for forming pipes and plates using a TU-shaped magnetic collector, characterized in that: Including the following steps: Step 1: Fabricate a circular doughnut-shaped magnetic collector with a coil cavity, and place a driving coil in the coil cavity; Step 2: Set and fix the管件 to be formed and the plate to be formed on the upper, lower, inner, and outer sides of the doughnut-shaped magnetic collector; Step 2.1: Set the管件 to be formed on the inner and outer sides of the doughnut-shaped magnetic collector and fix it; Step 2.2: Set the plate to be formed on the upper and lower sides of the doughnut-shaped magnetic collector and fix it; Step 3: Connect the driving coil to a pulse power supply via a discharge switch; Step 4: Control the discharge switch to supply power to the driving coil, generating induced eddy currents in the管件 to be formed and the plate to be formed, causing the管件 and the plate to deform and reach the forming specifications; Step 5: Respectively determine whether the管件 to be formed and the plate to be formed reach the forming specifications. If there are管件 or plates that do not reach the forming specifications, remove the管件 and plates that reach the forming specifications, and repeat Steps 3 and 4 for the管件 or plates that do not reach the forming specifications until they reach the forming specifications.

2. The method for forming pipes and plates using a TU-shaped magnetic collector according to claim 1, characterized in that: Divide the doughnut-shaped magnetic collector into upper and lower parts to facilitate the placement or removal of the driving coil.

3. The device for forming a pipe and a plate using a TU-shaped magnetic collector as claimed in claim 1 or 2, characterized in that: Including a doughnut-shaped magnetic collector (2), a driving coil (1), and a pulse power supply. The doughnut-shaped magnetic collector includes an outer convex ring (2.1), an inner convex ring (2.2), and an upper convex ring (2.3). The doughnut-shaped magnetic collector is provided with a coil cavity (2.5) and a through hole (2.6) for placing the管件 to be formed. The side wall of the doughnut-shaped magnetic collector is provided with a slit (2.7). The cross-section of the doughnut-shaped magnetic collector is doughnut-shaped. The driving coil (1) is placed in the coil cavity (2.5). The driving coil (1) is connected to the pulse power supply via a discharge switch. The device realizes the simultaneous processing and forming of double管件 and plates.

4. The device for forming a pipe and a plate using a spherical magnetic collector as claimed in claim 1 or 2, characterized in that: Including a doughnut-shaped magnetic collector (2), a driving coil (1), and a pulse power supply. The doughnut-shaped magnetic collector includes an outer convex ring (2.1), an inner convex ring (2.2), and a lower convex ring (2.4). The doughnut-shaped magnetic collector is provided with a coil cavity (2.5) and a through hole (2.6) for placing the管件 to be formed. The side wall of the doughnut-shaped magnetic collector is provided with a slit (2.7). The cross-section of the doughnut-shaped magnetic collector is doughnut-shaped. The driving coil (1) is placed in the coil cavity (2.5). The driving coil (1) is connected to the pulse power supply via a discharge switch. The device realizes the simultaneous processing and forming of double管件 and plates.

5. The device for forming a pipe and a plate using a TU-shaped magnetic collector as claimed in claim 1 or 2, characterized in that: Including a doughnut-shaped magnetic collector (2), a driving coil (1), and a pulse power supply. The doughnut-shaped magnetic collector includes an inner convex ring (2.2), an upper convex ring (2.3), and a lower convex ring (2.4). The doughnut-shaped magnetic collector is provided with a coil cavity (2.5) and a through hole (2.6) for placing the管件 to be formed. The side wall of the doughnut-shaped magnetic collector is provided with a slit (2.7). The cross-section of the doughnut-shaped magnetic collector is doughnut-shaped. The driving coil (1) is placed in the coil cavity (2.5). The driving coil (1) is connected to the pulse power supply via a discharge switch. The device realizes the simultaneous processing and forming of double plates and管件.

6. The device for forming a pipe and a plate using a spherical magnetic collector as claimed in claim 1 or 2, characterized in that: It includes a T-shaped magnetic collector (2), a drive coil (1) and a pulse power supply. The T-shaped magnetic collector includes an inner convex ring (2.2), an upper convex ring (2.3) and a lower convex ring (2.4). The T-shaped magnetic collector is provided with a coil cavity (2.5) and a through hole (2.6) for placing the pipe fitting to be formed. The side wall of the T-shaped magnetic collector is provided with a slit (2.7). The cross section of the T-shaped magnetic collector is T-shaped. The drive coil (1) is placed in the coil cavity (2.5). The drive coil (1) is connected to the pulse power supply through a discharge switch. The device realizes the simultaneous processing and forming of double plates and pipe fittings.

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