Electromagnetic forming assistance-based explosive welding device and using method thereof

Abstract

The invention discloses an explosive welding device based on electromagnetic forming assistance and a using method thereof, and belongs to the explosive welding technology, the device comprises an electromagnetic forming assembly, an energy-containing plastic pipe and a red copper pipe, the electromagnetic forming assembly generates pulse current through current conduction and forms a transient magnetic field, the red copper pipe is arranged in the transient magnetic field, and the energy-containing plastic pipe is connected with the red copper pipe. 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] The invention belongs to the technical field of explosion welding, and in particular relates to an explosion welding device assisted by electromagnetic forming and a use method thereof. Background Art

[0002] Explosive welding is a technology that uses the powerful shock wave generated by the explosion of explosives to drive the composite metal and the base metal to collide obliquely at high speed, generate jets and small-scale melting at the surface to be welded, and thus achieve metallurgical bonding between them. Compared with other connection technologies, the significant advantages of explosive composites are high bonding strength, small heat-affected zone, and strong welding ability of dissimilar metals. At present, explosive welding has achieved welding between more than 300 kinds of metal materials, and its products have excellent performance due to the combination of the advantages of multiple metal components and excellent bonding quality. With the development of modern industry, explosive welding composite materials have become an indispensable key material in traditional industrial fields such as petrochemicals and machinery manufacturing, and have also promoted the sustainable development of many high-tech fields such as aerospace, weapons and equipment, and nuclear industry.

[0003] At present, the driving force for explosive welding is generally provided by the explosion of explosives, but the method of using explosives has certain limitations, which are as follows: First, when using explosives for explosive welding, all construction workers must evacuate beyond the warning line determined by the shock wave safety distance, which is prone to shock wave injuries; second, the explosives processing process is more dangerous than other processing methods, and its use and control are strict, which is not conducive to large-scale industrialized and automated production; third, the use of explosives to complete explosive welding operations places high demands on the workers' labor intensity and operational proficiency.

[0004] It can be seen that since the driving force of the existing explosive welding is provided by explosives, the safety during processing and use cannot be guaranteed, and it is not conducive to large-scale industrialized and automated production. Summary of the invention

[0005] The present invention provides an electromagnetic forming-assisted explosion welding device and a method for using the same, in order to solve the technical problems that the driving force of the existing explosion welding is provided by explosives, so the safety during processing and use cannot be guaranteed and it is not conducive to large-scale industrialized and automated production.

[0006] In order to achieve the above object, the present invention adopts the following technical contents:

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

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

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

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

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

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

[0013] The magnetic field coil, the pulse capacitor group, the switch and the charger form a discharge loop.

[0014] Furthermore, one end of the pulse capacitor group is connected to the magnetic field coil through the switch, and the other end is connected to the ground.

[0015] Furthermore, the magnetic field coil is a solenoid coil or a Bitter coil wound with flat copper wire.

[0016] Furthermore, the switch is a thyristor switch, a gas switch or a mechanical switch.

[0017] Furthermore, the charger is an explosion-proof charger.

[0018] A method for using an electromagnetic forming-assisted explosive welding device, based on the electromagnetic forming-assisted explosive welding device, comprises:

[0019] Turning on the electromagnetic forming component allows the current to flow, generating a transient magnetic field. Under the action of the transient magnetic field, the copper tube deforms and collides with the energetic plastic tube, eventually causing the energetic plastic tube to generate symmetrical cylindrical waves to drive the outer tube to be welded to deform, thereby completing the welding with the inner rod to be welded.

[0020] Further, including:

[0021] The charger charges the pulse capacitor bank. After charging is completed, the charger is turned off, and the discharge circuit is turned on by the switch. The pulse capacitor bank releases a pulse current to the magnetic field coil, so that the magnetic field coil generates a transient magnetic field through the pulse current.

[0022] Further, including:

[0023] The charger charges the pulse capacitor bank. After charging is completed, the charger is turned off and the discharge circuit is turned on by the switch. The pulse capacitor bank releases pulse current to the magnetic field coil. The magnetic field coil generates a transient magnetic field through the pulse current. The transient magnetic field is confined to the copper tube by the magnetic collector so that the copper tube can be deformed and impact the energetic plastic tube.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention provides an explosive welding device assisted by electromagnetic forming, which comprises an electromagnetic forming component capable of releasing a pulse current after current conduction, an energetic plastic tube and a copper tube; the electromagnetic forming component generates a pulse current and forms a transient magnetic field by current conduction, and the copper tube is placed in the transient magnetic field, deforms and performs high-speed impact on the energetic plastic tube to complete welding; the electromagnetic forming component and the magnetic field coil can uniformly drive the copper tube to perform radial necking, so that the energetic plastic tube is subjected to uniform impact force in the circumferential direction, so that the energetic plastic tube deflagrates under high temperature and high pressure to generate symmetrical cylindrical waves, driving the internal workpiece to deform uniformly; the device uses energetic plastic to replace explosives for explosive welding, which not only greatly improves the safety and practicality of explosive welding, but also is conducive to 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 promotion and application value.

[0026] Preferably, in the present invention, the arrangement of the magnetic collector can more effectively concentrate the transient magnetic field generated by the electromagnetic forming assembly around the copper tube, thereby enhancing the electromagnetic forming effect on the copper tube, thereby improving the accuracy and strength of the impact and optimizing the welding effect.

[0027] Preferably, in the present invention, the electromagnetic forming assembly includes a magnetic field coil, a charger, a pulse capacitor group and a switch, and these components together constitute a discharge circuit to provide the required pulse current for the magnetic field coil, making the device more modular and easy to maintain and upgrade.

[0028] Preferably, in the present invention, one end of the pulse capacitor bank is connected to the magnetic field coil through a switch, and the other end is connected to the ground, which helps to stabilize the circuit, prevent charge accumulation, and ensure safe operation of the device.

[0029] Preferably, in the present invention, there are two optional structures of the magnetic field coil, namely, a solenoid coil or a Bitter coil; both structures can effectively generate a transient magnetic field, and the user can select a suitable structure according to specific needs, thereby increasing the flexibility and applicability of the device.

[0030] Preferably, in the present invention, the charger adopts 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 explosions, thereby improving the overall safety of the device.

[0031] The present invention also provides a method for using an explosive welding device assisted by electromagnetic forming. Based on the above-mentioned explosive welding device assisted by electromagnetic forming, the method includes the steps of turning on the electromagnetic forming component, releasing pulse current, generating a transient magnetic field, deforming the copper tube at high speed and colliding with the energetic plastic tube. The method can accurately control the welding process, improve the welding quality and efficiency, and improve the safety of the entire explosive welding process.

[0032] Preferably, in the present invention, the transient magnetic field generated by the magnetic field coil is concentrated by the magnetic collector and then constrained around the copper tube. In this way, the electromagnetic forming effect is improved, thereby improving the accuracy and strength of the impact, ensuring the welding effect while improving the accuracy and strength of the impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of an electromagnetic forming-assisted explosion welding device provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the current direction of an electromagnetic forming-assisted explosion welding device provided by an embodiment of the present invention during operation;

[0035] Figure 3 A schematic structural diagram of another explosive welding device based on electromagnetic forming assistance provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the current direction of another electromagnetic forming-assisted explosion welding device provided by an embodiment of the present invention during operation;

[0037] Figure 5 A schematic diagram of deformation of an outer tube during explosion welding provided in an embodiment of the present invention.

[0038] Reference numerals:

[0039] 1-magnetic field coil; 2-purple 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-earth; 10-magnetic collector. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0048] Example 1

[0049] As mentioned in the background technology, the explosion welding method using explosives has certain limitations, which are as follows: First, when using explosives for explosion welding, all construction workers must evacuate beyond the warning line determined by the shock wave safety distance, which can easily cause shock wave injuries; Second, the explosives processing process is more dangerous than other processing methods, and its use and control are strict, which is not conducive to large-scale industrialized and automated production; Third, the use of explosives to complete explosion welding operations places high demands on the workers' labor intensity and operational proficiency.

[0050] In order to solve the above problems, the present embodiment provides an explosive welding device based on electromagnetic forming assistance, which electromagnetically drives a thin-walled copper tube to collide with an energetic plastic tube. The energetic plastic tube quickly explodes under high temperature and high pressure, thereby generating an impact force to drive the outer tube to deform at high speed and collide with the inner rod at a speed of 100 to 800 m / s; the outer tube and the inner rod are welded together, thereby greatly improving the safety and practicality of explosive welding.

[0051] like Figure 1 As shown, this embodiment provides an explosive welding device assisted by electromagnetic forming, 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 is composed of a magnetic field coil 1, a switch 6, a pulse capacitor group 7 and a charger 8; the copper tube 2 is a thin-walled copper tube.

[0052] The magnetic field coil 1 forms a discharge circuit through the switch 6 and the pulse capacitor group 7; the charger 8 is used to charge the pulse capacitor group 7 and maintain the voltage; one end of the pulse capacitor group 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.

[0053] In this embodiment, in order to ensure the safe operation of the device in an explosive environment, the charger 8 is an explosion-proof charger.

[0054] In this embodiment, the magnetic field coil 1 can be a solenoid coil or a Bitter coil, and the user can select a suitable structure according to specific needs, thereby increasing the flexibility and applicability of the device.

[0055] In this embodiment, the switch 6 can be any one of a thyristor switch, a gas switch or a mechanical switch.

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

[0057] like Figure 2As shown in the figure, when a signal is received, the switch 6 is turned on first, and the pulse capacitor group 7 discharges the magnetic field coil 1. A pulse large current i1 flows through the magnetic field coil 1, so that the magnetic field coil 1 generates a transient magnetic field, and the copper tube 2 placed in the magnetic field induces an eddy current i2 opposite to that in the coil 1, as shown in FIG. Figure 2 As shown, the copper tube 2 is deformed at high speed and hits the energetic plastic tube 3 under the action of electromagnetic repulsion; the cooperation of the electromagnetic forming component and the magnetic field coil 1 can evenly drive the thin-walled copper tube 2 to perform radial necking, so that the energetic plastic tube 3 is subjected to uniform impact force in the circumferential direction, so that the energetic plastic tube 3 deflagrates to produce symmetrical cylindrical waves, driving the outer tube 4 to be welded to evenly deform and hit 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 embodiment 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; and the electromagnetic forming component can evenly drive the thin-walled copper tube to perform radial necking, so that the energetic plastic tube is subjected to uniform impact force in the circumferential direction, so that the energetic plastic tube deflagrates under high temperature and high pressure to produce symmetrical cylindrical waves, driving the internal workpiece to deform evenly.

[0058] Example 2

[0059] like Figure 2 As shown, this embodiment provides another explosive welding device based on electromagnetic forming assistance. Based on the same structure as embodiment 1, optimization and improvement are carried out on the basis of embodiment 1. In this embodiment, a magnetic collector 10 is arranged between the magnetic field coil 1 and the copper tube 2; the magnetic 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 magnetic collector 10, which specifically includes:

[0060] It includes an electromagnetic forming component, a magnetic collector 10, a copper tube 2, an explosive energetic plastic tube 3, an outer tube 4 to be welded and an inner rod 5 to be welded; wherein the electromagnetic forming component is composed of a magnetic field coil 1, a switch 6, a pulse capacitor group 7 and a charger 8, and the charger 8 is used to charge the pulse capacitor group 7 and maintain the pressure.

[0061] This embodiment provides an explosion welding device based on electromagnetic forming assistance, and the specific working principle is as follows:

[0062] When the signal is received, the switch 6 is first turned on, and the pulse capacitor group 7 discharges the magnetic field coil 1. A pulse large current i1 flows through the magnetic field coil 1, so that the magnetic field coil 1 generates a transient magnetic field, and the magnetic collector 10 placed in the magnetic field induces an eddy current i2 opposite to that in the magnetic field coil 1. Since the magnetic collector 10 has a gap and the working area length of the magnetic collector 10 is less than the axial length of the magnetic field coil 1, the inner hole surface of the magnetic collector 10 is concentrated, thereby generating an eddy current i3 opposite to the current i1 of the magnetic field coil 1 in the copper tube 2, as shown in FIG. Figure 4and Figure 5 As shown, the copper tube 2 is deformed at high speed and impacts the energetic plastic tube 3 under the action of electromagnetic repulsion. The cooperation of the electromagnetic forming assembly and the magnetic field coil 1 can evenly drive the thin-walled copper tube 2 to perform radial necking, so that the energetic plastic tube 3 is subjected to uniform impact force in the circumferential direction, so that the energetic plastic tube 3 deflagrates under high temperature and high pressure to produce symmetrical cylindrical waves, driving the outer tube 4 to be welded to uniformly deform 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; the 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; and the electromagnetic forming system can evenly drive the thin-walled copper tube to perform radial necking, so that the energetic plastic tube is subjected to uniform impact force in the circumferential direction, so that the energetic plastic tube deflagrates to produce symmetrical cylindrical waves, driving the internal workpiece to deform uniformly.

[0063] In this embodiment, since a magnetic concentrator is provided, the transient magnetic field generated by the magnetic field coil can be more effectively concentrated around the copper tube, thereby enhancing the electromagnetic forming effect on the copper tube, thereby improving the accuracy and strength of the impact and optimizing the welding effect.

[0064] In summary, the present invention provides an explosive welding device based on electromagnetic forming assistance and a method of using the same, which has the following advantages over the existing explosive welding measures using explosives:

[0065] First, it improves welding safety: By controlling the pulse current through the electromagnetic forming component, the direct use of explosives for welding is avoided, and the shock waves and noise generated during the welding process are significantly reduced, thereby improving the safety of operators and the protection of the surrounding environment.

[0066] Second, the welding accuracy and controllability are enhanced: the electromagnetic forming technology enables the release of pulse current and the generation of magnetic field to be precisely controlled, thereby achieving precise adjustment of the deformation and impact force of the copper tube, improving the welding accuracy and uniformity.

[0067] Third, the utilization rate of the magnetic field is optimized: the setting of the magnetic 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 deform at high speed and impact the energetic plastic tube.

[0068] Fourth, the adaptability and flexibility of the equipment are improved: the use of different types of magnetic field coils (such as solenoid coils or Bitter coils), switches (such as thyristor switches, gas switches or mechanical switches) and explosion-proof chargers enables the device to adapt to different working environments and welding requirements, thereby improving the adaptability and flexibility of the equipment.

[0069] Fifth, it has the characteristics of energy conservation, environmental protection and economic benefits: Compared with 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 and improves economic benefits.

[0070] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. An explosive welding device based on electromagnetic forming assistance, characterized in that: It comprises an electromagnetic forming component, a copper tube (2) and an energetic plastic tube (3); The electromagnetic forming component can generate a pulse current and form a transient magnetic field after the current is turned on; The copper tube (2) is located in a transient magnetic field. Under the action of the transient magnetic field, the copper tube (2) can be deformed and impact the energetic plastic tube (3).

2. The explosive welding device based on electromagnetic forming assistance according to claim 1 is characterized in that: A magnetic flux collector (10) is arranged between the electromagnetic forming assembly and the copper tube (2); the magnetic flux 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 magnetic flux collector (10).

3. The explosive welding device based on electromagnetic forming assistance according to claim 1 is characterized in that: The electromagnetic forming assembly comprises a magnetic field coil (1), a charger (8), a pulse capacitor group (7) and a switch (6); The magnetic field coil (1) is capable of forming a transient magnetic field through a pulse current generated by a pulse capacitor group (7); The magnetic field coil (1), the pulse capacitor group (7), the switch (6) and the charger (8) form a discharge circuit.

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

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

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

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

8. A method for using an electromagnetic forming-assisted explosive welding device, based on the electromagnetic forming-assisted explosive welding device according to any one of claims 1 to 7, characterized in that: include: The electromagnetic forming assembly is turned on to conduct current and generate a transient magnetic field. Under the action of the transient magnetic field, the copper tube (2) is deformed and collides with the energetic plastic tube (3), and finally the energetic plastic tube (3) generates a symmetrical cylindrical wave to drive the outer tube (4) to be welded to deform, thereby completing welding with the inner rod (5) to be welded.

9. The method for using the electromagnetic forming-assisted explosion welding device according to claim 8, characterized in that: include: The charger (8) charges the pulse capacitor group. After charging is completed, the charger is turned off, and the discharge circuit is turned on through the switch (6). The pulse capacitor group (7) releases a pulse current to the magnetic field coil (1), so that the magnetic field coil (1) generates a transient magnetic field through the pulse current.

10. The method for using the electromagnetic forming-assisted explosion welding device according to claim 8, characterized in that: include: The charger (8) charges the pulse capacitor group. After charging is completed, the charger is turned off, and the discharge circuit is turned on through the switch (6). The pulse capacitor group (7) releases a pulse current to the magnetic field coil (1). The magnetic field coil (1) generates a transient magnetic field through the pulse current. The transient magnetic field is confined to the periphery of the copper tube (2) by the magnetic collector (10), so that the copper tube (2) is deformed and impacts the energetic plastic tube (3).

Images