Explosive welding device based on electromagnetic forming assistance

Abstract

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

Description

Technical Field

[0001] This utility model belongs to the field of explosive welding technology, and in particular relates to an explosive welding device based on electromagnetic forming assistance. Background Technology

[0002] Explosive welding is a technique that utilizes the powerful shock wave generated by an explosive explosion to drive a high-speed, oblique collision between a cladding metal and a base metal, creating a jet of material and small-scale melting at the welding surface, thereby achieving a metallurgical bond. Compared to other joining technologies, explosive composite welding offers significant advantages in terms of high bonding strength, a small heat-affected zone, and strong welding capabilities between dissimilar metals. Currently, explosive welding has been used to weld over 300 types of metal materials, and its products possess excellent performance due to the combination of the advantages of multiple metal components and superior bonding quality. With the development of modern industry, explosively welded composite materials have become indispensable key materials in traditional industrial fields such as petrochemicals and machinery manufacturing, and have also driven the continuous development of many high-tech fields such as aerospace, weaponry, and nuclear industry.

[0003] Currently, the driving force for explosive welding is generally provided by explosive detonation. However, the use of explosive detonation has certain limitations, specifically: First, when using explosives for explosive welding, all construction personnel must evacuate to a warning line determined by the safe distance of the shock wave, which can easily lead to shock wave injuries; Second, the processing of explosives has a higher risk factor than other processing methods, and its use and control are strict, which is not conducive to large-scale industrialized and automated production; Third, using explosives to complete explosive welding operations places high demands on the labor intensity and operational skills of workers.

[0004] It is evident that since the driving force of existing explosive welding is provided by explosives, safety during processing and use cannot be guaranteed, and it is also not conducive to large-scale industrial and automated production. Utility Model Content

[0005] This invention provides an explosive welding device based on electromagnetic forming assistance to solve the technical problem that existing explosive welding is driven by explosives, which cannot guarantee safety during processing and use, and is also not conducive to large-scale industrial and automated production.

[0006] To achieve the above objectives, the present invention adopts the following technical content:

[0007] An explosive welding apparatus based on electromagnetic forming assistance includes an electromagnetic forming component, a copper tube, and an energetic plastic tube.

[0008] The electromagnetic forming component is able to generate pulse current and form transient magnetic field after the current is turned on;

[0009] The copper tube is located in a transient magnetic field, and the copper tube can deform under the action of the transient magnetic field and impact the energetic plastic tube.

[0010] Furthermore, a magnet collector is provided between the electromagnetic forming component and the copper tube; the magnet collector is placed in the transient magnetic field generated by the electromagnetic forming component, and the copper tube is placed in the magnetic field of the magnet collector.

[0011] Furthermore, the electromagnetic forming assembly includes a magnetic field coil, a charger, a pulse capacitor bank, and a switch;

[0012] The magnetic field coil can generate a transient magnetic field through the pulse current generated by the pulse capacitor bank;

[0013] The magnetic field coil, the pulse capacitor bank, the switch, and the charging mechanism form a discharge circuit.

[0014] Furthermore, the magnetic field coil is connected in series with the pulse capacitor bank.

[0015] Furthermore, one end of the pulse capacitor bank is connected to the magnetic field coil via the switch, and the other end is connected to the ground.

[0016] Furthermore, the magnetic field coil is a solenoid coil or a Bitter coil wound with flat copper wire.

[0017] Furthermore, the geometric centers of the magnetic field coil, the copper tube, and the energetic plastic tube are all located on the same straight line.

[0018] Furthermore, the switch is a thyristor switch, a gas switch, or a mechanical switch.

[0019] Furthermore, the charger is an explosion-proof charger.

[0020] Furthermore, a gap is formed between the copper tube and the energetic plastic tube.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention provides an explosive welding device based on electromagnetic forming assistance. The device includes an electromagnetic forming component capable of releasing a pulsed current after current is applied, an energetic plastic tube, and a copper tube. The electromagnetic forming component generates a pulsed current and forms a transient magnetic field through current application. The copper tube is placed in the transient magnetic field, deforms, and impacts the energetic plastic tube at high speed to complete the welding. The electromagnetic forming component and the magnetic field coil can uniformly drive the copper tube to radially narrow, causing the energetic plastic tube to be subjected to a uniform impact force in the circumferential direction. This results in the energetic plastic tube deflagrating under high temperature and pressure, generating symmetrical cylindrical waves that drive uniform deformation of the internal workpiece. This device uses energetic plastic instead of explosives for explosive welding, which not only greatly improves the safety and practicality of explosive welding but also facilitates large-scale industrial and automated production. The device has a simple structure and principle, is easy to use and produce, has high safety, and has good application value.

[0023] Prior to this invention, the magnet collector can more effectively concentrate the transient magnetic field generated by the electromagnetic forming component around the copper tube, enhancing the electromagnetic forming effect on the copper tube, thereby improving the accuracy and force of the impact and optimizing the welding effect.

[0024] Preferably, in this invention, the electromagnetic forming component includes a magnetic field coil, a charger, a pulse capacitor bank, and a switch. These components together form a discharge circuit, providing the required pulse current to the magnetic field coil, making the device more modular and easier to maintain and upgrade.

[0025] Prior to this invention, one end of the pulse capacitor bank is connected to the magnetic field coil via a switch, and the other end is connected to the ground, which helps to stabilize the circuit, prevent charge accumulation, and ensure the safe operation of the device.

[0026] Prior to this invention, the magnetic field coil has two optional structures: a solenoid coil or a Bitter coil. Both structures can effectively generate transient magnetic fields, and users can choose the appropriate structure according to their specific needs, which increases the flexibility and applicability of the device.

[0027] Prior to this invention, the charger is an explosion-proof charger, which can ensure the safe operation of the device in an explosive environment; the explosion-proof charger can effectively prevent factors such as electric sparks that may cause an explosion, thus improving the overall safety of the device. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of an explosive welding device based on electromagnetic forming assistance provided for an embodiment of this utility model;

[0029] Figure 2 A schematic diagram of the current direction during operation of an explosive welding device based on electromagnetic forming assistance, provided for an embodiment of this utility model;

[0030] Figure 3 A schematic diagram of another electromagnetic forming-assisted explosive welding device provided for an embodiment of this utility model;

[0031] Figure 4 A schematic diagram of the current direction during operation of another electromagnetically formed assisted explosive welding device provided for an embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram of the deformation of the outer tube during the explosive welding process provided in an embodiment of the present invention.

[0033] Figure label:

[0034] 1-Magnetic field coil; 2-Copper tube; 3-Energy-containing plastic tube; 4-Outer tube to be welded; 5-Inner rod to be welded; 6-Switch; 7-Pulse capacitor bank; 8-Charger; 9-Ground; 10-Magnetic collector. Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings:

[0043] Example 1

[0044] As mentioned in the background section, explosive welding using explosives has certain limitations, specifically as follows: First, when using explosives for welding, all construction personnel must evacuate to a safe distance defined by the shock wave, which can easily lead to injuries from the shock wave; second, the processing of explosives is relatively more dangerous than other processing methods, requiring strict use and control, which is not conducive to large-scale industrial and automated production; third, using explosives for welding places higher demands on the labor intensity and operational skills of workers.

[0045] To address the aforementioned issues, this embodiment provides an explosive welding device based on electromagnetic forming assistance. By electromagnetically driving a thin-walled copper tube to impact an energetic plastic tube, the energetic plastic tube rapidly explodes under high temperature and pressure, generating an impact force that drives the outer tube to deform at high speed and impact the inner rod, thereby welding the outer tube and the inner rod together. This greatly improves the safety and practicality of explosive welding.

[0046] like Figure 1 As shown, this embodiment provides an explosive welding device based on electromagnetic forming assistance, including an electromagnetic forming component, a copper tube 2, an explosive and flammable energetic plastic tube 3, an outer tube 4 to be welded, and an inner rod 5 to be welded; wherein, the electromagnetic forming component consists of a magnetic field coil 1, a switch 6, a pulse capacitor bank 7, and a charger 8; the copper tube 2 is a thin-walled copper tube.

[0047] The magnetic field coil 1 forms a discharge circuit through the switch 6 and the pulse capacitor bank 7; the charger 8 is used to charge the pulse capacitor bank 7 and maintain its voltage; one end of the pulse capacitor bank 7 is connected to the magnetic field coil 1 through the switch, and the other end is connected to the ground 9, which helps to stabilize the circuit, prevent charge accumulation, and ensure the safe operation of the device.

[0048] In this embodiment, to ensure the safe operation of the device in an explosive atmosphere, the charger 8 is an explosion-proof charger.

[0049] In this embodiment, the magnetic field coil 1 can be a solenoid coil or a Bitter coil. Users can choose the appropriate structure according to their specific needs, which increases the flexibility and applicability of the device.

[0050] In this embodiment, switch 6 can be any of a thyristor switch, a gas switch, or a mechanical switch.

[0051] This embodiment provides an explosive welding device based on electromagnetic forming assistance, the specific working principle of which is as follows:

[0052] like Figure 2 As shown, when a signal is received, switch 6 is first turned on, and pulse capacitor bank 7 discharges to magnetic field coil 1. A large pulse current i1 flows through magnetic field coil 1, thereby generating a transient magnetic field in magnetic field coil 1. Eddy current i2, opposite to that in coil 1, is induced in the copper tube 2 placed in the magnetic field. Figure 2 As shown, the copper tube 2 deforms at high speed under the action of electromagnetic repulsion, impacting the energetic plastic tube 3. The cooperation of the electromagnetic forming component and the magnetic field coil 1 can uniformly drive the thin-walled copper tube 2 to radially narrow, so that the energetic plastic tube 3 is subjected to a uniform impact force in the circumferential direction. As a result, the energetic plastic tube 3 explodes and generates symmetrical cylindrical waves, which drive the outer tube 4 to be welded to deform uniformly and impact the inner rod 5 to be welded, so that the outer tube 4 to be welded and the inner rod 5 to be welded are welded together. In this embodiment, energetic plastic is used to replace explosives for explosive welding, which not only greatly improves the safety and practicality of explosive welding, but also facilitates large-scale industrial and automated production. Furthermore, the electromagnetic forming component can uniformly drive the thin-walled copper tube to radially narrow, so that the energetic plastic tube is subjected to a uniform impact force in the circumferential direction. As a result, the energetic plastic tube explodes under high temperature and high pressure, generating symmetrical cylindrical waves, which drive the internal workpiece to deform uniformly.

[0053] Example 2

[0054] like Figure 2 As shown, this embodiment provides another electromagnetic forming-assisted explosive welding device. Based on the same structure as Embodiment 1, optimizations and improvements have been made. In this embodiment, a magnet collector 10 is provided between the magnetic field coil 1 and the copper tube 2; the magnet collector 10 is placed in the transient magnetic field generated by the magnetic field coil 1, and the copper tube 2 is placed in the magnetic field of the magnet collector 10. Specifically, it includes:

[0055] It includes an electromagnetic forming assembly, a magnet collector 10, a copper tube 2, an explosive and flammable energetic plastic tube 3, an outer tube to be welded 4, and an inner rod to be welded 5; wherein, the electromagnetic forming assembly consists of a magnetic field coil 1, a switch 6, a pulse capacitor bank 7, and a charger 8, and the charger 8 is used to charge the pulse capacitor bank 7 and maintain its voltage.

[0056] This embodiment provides an explosive welding device based on electromagnetic forming assistance, the specific working principle of which is as follows:

[0057] When a signal is received, switch 6 is first turned on, and pulse capacitor bank 7 discharges to magnetic field coil 1. A large pulse current i1 flows through magnetic field coil 1, thereby generating a transient magnetic field. Eddy current i2, opposite to that in magnetic field coil 1, is induced in the magnet collector 10 placed in the magnetic field. Because magnet collector 10 has a gap and the length of its working area is less than the axial length of magnetic field coil 1, the current is concentrated on the inner surface of magnet collector 10, thus generating eddy current i3, opposite to the current i1 in magnetic field coil 1, in copper tube 2. Figure 4 and Figure 5 As shown, the copper tube 2 deforms at high speed under the action of electromagnetic repulsion, impacting the energetic plastic tube 3. The cooperation of the electromagnetic forming component and the magnetic field coil 1 can uniformly drive the thin-walled copper tube 2 to radially narrow, thereby causing the energetic plastic tube 3 to be subjected to a uniform impact force in the circumferential direction. As a result, the energetic plastic tube 3 explodes under high temperature and pressure, generating symmetrical cylindrical waves, which drive the outer tube 4 to be welded to deform uniformly and impact the inner rod 5 to be welded, so that the outer tube 4 to be welded and the inner rod 5 to be welded are welded together. This device uses energetic plastic to replace explosives for explosive welding, which not only greatly improves the safety and practicality of explosive welding, but also facilitates large-scale industrial and automated production. Furthermore, the electromagnetic forming system can uniformly drive the thin-walled copper tube to radially narrow, causing the energetic plastic tube to be subjected to a uniform impact force in the circumferential direction. As a result, the energetic plastic tube explodes, generating symmetrical cylindrical waves, which drive the internal workpiece to deform uniformly.

[0058] In this embodiment, the presence of a magnet collector allows for more effective concentration of the transient magnetic field generated by the magnetic field coil around the copper tube, enhancing the electromagnetic forming effect on the copper tube and thus improving the accuracy and force of the impact, thereby optimizing the welding effect.

[0059] In summary, this utility model provides an explosive welding device based on electromagnetic forming assistance, which has the following advantages compared with existing explosive welding methods that use explosives:

[0060] First, it improves welding safety: By controlling the pulse current through the electromagnetic forming component, the direct use of explosives for welding is avoided, which significantly reduces the shock waves and noise generated during the welding process, thereby improving the safety of operators and protecting the surrounding environment.

[0061] Secondly, it enhances welding precision and controllability: Electromagnetic forming technology allows for precise control of the release of pulse current and the generation of magnetic field, thereby enabling precise adjustment of the deformation and impact force of the copper tube, improving the precision and uniformity of welding.

[0062] Third, the magnetic field utilization rate is optimized: the setting of the magnet collector effectively constrains and concentrates the transient magnetic field generated by the magnetic field coil around the copper tube, improving the utilization rate of the magnetic field and the energy conversion efficiency, so that the copper tube can more effectively undergo high-speed deformation and impact the energetic plastic tube.

[0063] Fourth, it enhances the adaptability and flexibility of the equipment: by adopting different types of magnetic field coils (such as solenoid coils or biter coils), switches (such as thyristor switches, gas switches or mechanical switches) and explosion-proof chargers, the device can adapt to different working environments and welding requirements, thus improving the adaptability and flexibility of the equipment.

[0064] Fifth, it features energy conservation, environmental protection, and economic benefits: Compared to traditional explosive welding methods, this technology reduces the use of explosives and the generation of waste, which is beneficial to environmental protection and energy conservation and emission reduction. At the same time, due to precise control and efficient energy conversion, it reduces energy consumption and costs, thus improving economic efficiency.

[0065] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. An explosive welding apparatus based on electromagnetic forming assistance, characterized in that, It includes an electromagnetic forming assembly, a copper tube (2), and an energetic plastic tube (3); The electromagnetic forming component is able to generate pulse current and form transient magnetic field after the current is turned on; The copper tube (2) is located in a transient magnetic field. The copper tube (2) can deform under the action of the transient magnetic field and impact the energetic plastic tube (3).

2. The explosive welding apparatus based on electromagnetic forming assistance according to claim 1, characterized in that, A magnet collector (10) is provided between the electromagnetic forming assembly and the copper tube (2); the magnet collector (10) is placed in the transient magnetic field generated by the electromagnetic forming assembly, and the copper tube (2) is placed in the magnetic field of the magnet collector (10).

3. The explosive welding apparatus based on electromagnetic forming assistance according to claim 1, characterized in that, The electromagnetic forming assembly includes a magnetic field coil (1), a charger (8), a pulse capacitor bank (7), and a switch (6); The magnetic field coil (1) can form a transient magnetic field through the pulse current generated by the pulse capacitor bank (7); The magnetic field coil (1), together with the pulse capacitor bank (7), the switch (6) and the charger (8), form a discharge circuit.

4. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, The magnetic field coil (1) is connected in series with the pulse capacitor bank (7).

5. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, One end of the pulse capacitor bank (7) is connected to the magnetic field coil (1) through the switch (6), and the other end is connected to the ground (9).

6. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, The magnetic field coil (1) is a solenoid coil or a Bitter coil wound with flat copper wire.

7. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, The geometric centers of the magnetic field coil (1), the copper tube (2), and the energetic plastic tube (3) are all located on the same straight line.

8. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, The switch (6) is a thyristor switch, a gas switch or a mechanical switch.

9. The explosive welding apparatus based on electromagnetic forming assistance according to claim 3, characterized in that, The charger (8) is an explosion-proof charger.

10. The explosive welding apparatus based on electromagnetic forming assistance according to claim 1, characterized in that, A gap is formed between the copper tube (2) and the energetic plastic tube (3).

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