CN115846525A - Magnetic pulse bulging connection device and method for titanium alloy-stainless steel pipe - Google Patents
Magnetic pulse bulging connection device and method for titanium alloy-stainless steel pipe Download PDFInfo
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- CN115846525A CN115846525A CN202211701246.2A CN202211701246A CN115846525A CN 115846525 A CN115846525 A CN 115846525A CN 202211701246 A CN202211701246 A CN 202211701246A CN 115846525 A CN115846525 A CN 115846525A
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Abstract
The invention relates to a magnetic pulse bulging connection device and method for a titanium alloy-stainless steel pipe, which comprises a coaxial positioning block, wherein the metal pipe to be formed is arranged inside the coaxial positioning block, the metal pipe to be formed comprises a titanium alloy pipe and a stainless steel pipe, the stainless steel pipe is sleeved outside one end of the titanium alloy pipe, a gap is formed between the titanium alloy pipe and the stainless steel pipe, a forming coil is arranged inside a working area of the titanium alloy pipe, a magnetic collector is arranged between the forming coil and the inner surface of the titanium alloy pipe, and the forming coil is connected with a power supply system of a capacitor. The invention has reasonable design, high bonding strength, good controllability and high efficiency by performing high-speed impact welding on the titanium alloy pipe and the stainless steel pipe in a magnetic pulse bulging mode, does not need complex process and harsh working conditions, and solves the problems of welding effect and production flexibility of the titanium alloy and the stainless steel pipe welded by adopting the prior art.
Description
The technical field is as follows:
the invention belongs to the technical field of magnetic pulse connection, and particularly relates to a magnetic pulse bulging connection device and method for a titanium alloy-stainless steel pipe.
Background art:
the titanium alloy has the good performances of low density, high specific strength, strong corrosion resistance and the like, the density of the titanium alloy is 40 percent less than that of steel, the strength of the titanium alloy is equivalent to that of a steel pipe, but the materials of the titanium and the titanium alloy are expensive. Stainless steel is a commonly used structural material that has excellent properties by itself and is relatively low cost. The titanium alloy and the stainless steel pipe are combined, so that various advantages of the titanium alloy and the stainless steel pipe can be fully exerted, and the titanium alloy/stainless steel connecting pipe is beneficial to widening the application of the titanium alloy/stainless steel connecting pipe in the fields of aerospace, rail transit, medical appliances and the like.
However, the linear expansion coefficient, the thermal conductivity and the elastic modulus of the titanium alloy and the stainless steel are greatly different, so that the defects of serious segregation, stress gradient and the like are easily generated at the joint by direct fusion welding, and titanium and iron elements are easily combined to form a brittle intermetallic compound, so that the brittle fracture of the joint is caused. In addition, in order to meet the actual service performance, the pipe connection usually requires high shape and dimension precision and stable and consistent microstructure, so that the difficulty in obtaining a good pipe welding joint is high.
At present, the welding method for titanium alloy and stainless steel pipes mainly comprises electron beam welding, laser welding, explosion welding, brazing, diffusion welding, friction welding and the like. The electron beam welding needs to be carried out in a vacuum environment, and the generation of brittle intermetallic compounds of joints is difficult to avoid; the laser welding equipment is expensive, the requirement on a welding field is high, and the production and the use are not flexible enough; explosion welding, brazing, diffusion welding and friction welding have high control requirements on the welding process and are not suitable for complex welding structures and large-scale production.
Therefore, a new welding method of a titanium alloy and a stainless steel pipe material is required to be developed.
The invention content is as follows:
aiming at the problems in the prior art, the invention provides the magnetic pulse bulging connection device and method for the titanium alloy-stainless steel pipe, which are reasonable in design, stable and reliable in quality, and the bonding strength of the titanium alloy-stainless steel pipe is effectively improved.
In order to achieve the purpose, the invention adopts the technical scheme that: a magnetic pulse bulging connection device for a titanium alloy-stainless steel pipe comprises a coaxial positioning block, wherein a metal pipe to be formed is arranged inside the coaxial positioning block, the metal pipe to be formed comprises a titanium alloy pipe and a stainless steel pipe, the stainless steel pipe is sleeved outside one end of the titanium alloy pipe, a gap exists between the titanium alloy pipe and the stainless steel pipe, a forming coil is arranged inside a working area of the titanium alloy pipe, a magnetic collector is arranged between the forming coil and the inner surface of the titanium alloy pipe, and the forming coil is connected with a capacitor power supply system.
Further, a pipe positioning hole with an axis extending along the transverse direction is formed in the coaxial positioning block, and the pipe positioning hole is a stepped hole; the titanium alloy pipe is accommodated in the small-diameter section of the pipe positioning hole, and the stainless steel pipe is accommodated in the large-diameter section of the pipe positioning hole.
Further, the coil that takes shape includes coil skeleton, the winding has the section to be the solenoid coil of rectangle form on the coil skeleton, the outside cladding of solenoid coil has the glass silk cloth to it is fixed with the epoxy glue.
Furthermore, two axial ends of the coil framework are respectively provided with a limiting block and a lateral fixing block, the limiting blocks are positioned at the lower end inside the titanium alloy pipe and are arranged on one side of a coil outlet of the formed coil, and two side faces of the limiting blocks are respectively attached to the coaxial positioning block and the coil framework; the lateral fixing block is positioned in the stainless steel pipe and is attached to the surface of the magnetic collector.
Furthermore, the limiting block and the lateral fixing block are made of insulating materials, the limiting block is in a semi-cylinder shape, the lateral fixing block is in a stepped shaft shape, and one end, far away from the magnetic collector, of the lateral fixing block penetrates through the coaxial positioning block and extends outwards.
Furthermore, the coaxial positioning block comprises an upper positioning block and a lower positioning block which are in butt joint up and down, arc-shaped grooves used for being matched with the outer diameter of the pipe to be formed are formed in the upper positioning block and the lower positioning block, and the arc-shaped grooves of the upper positioning block and the arc-shaped grooves of the lower positioning block are spliced up and down to form the pipe positioning hole.
Furthermore, thread countersunk holes extending vertically are distributed on the joint surface of the lower positioning block, connecting studs penetrating through the upper positioning block are screwed in the thread countersunk holes, and locking nuts are screwed at the upper ends of the connecting studs; a side plate pressed on the step surface of the lateral fixed block is arranged at the side end of the lower positioning block, and the side plate is connected with the lower positioning block through a bolt; and arc handles are respectively fixed at two ends of the upper positioning block.
Furthermore, the capacitor power supply system comprises a pulse capacitor, a high-voltage generator, a high-voltage switch, a rectifier and a current-limiting resistor, the forming coil is connected with the pulse capacitor through a wire, the pulse capacitor is connected with the high-voltage generator through a wire, the high-voltage switch is connected in series on the wire connected between the pulse capacitor and the forming coil, and the rectifier and the current-limiting resistor are connected in series on the wire connected between the high-voltage generator and the pulse capacitor.
Furthermore, a layer of driving ring is bonded on the inner surface of the working area of the titanium alloy pipe, and the driving ring is made of a metal material with low resistivity and low yield strength.
The invention adopts another technical scheme that: a magnetic pulse bulging connection method of titanium alloy-stainless steel pipes comprises the following steps:
step S1: polishing the surfaces to be connected of the titanium alloy pipe and the stainless steel pipe to remove an oxide layer and impurities;
step S2: sequentially and coaxially placing the formed coil, the magnetic collector, the titanium alloy pipe and the stainless steel pipe in the lower positioning block from inside to outside, wherein a gap is formed between the titanium alloy pipe and the stainless steel pipe;
and step S3: the upper positioning block and the lower positioning block are butted and locked up and down, and the side plate is fixed at the side end of the lower positioning block, so that the coil, the magnetic collector, the titanium alloy pipe and the stainless steel pipe are fixed;
and step S4: and a capacitor power supply system is used for charging and discharging the formed coil, so that the titanium alloy pipe expands outwards to generate bulging plastic deformation and collides with the stainless steel pipe at a high speed, and high-strength metallurgical bonding is realized.
Further, in step S2, the material of the formed coil and the material of the magnetic collector are red copper and copper alloy, respectively.
Further, in step S2, the gap between the titanium alloy tube and the stainless steel tube is set to be 1.5 to 3mm.
Further, in step S3, the coaxial positioning block is made of bakelite, epoxy resin and 45 steel.
Further, in step S4, the discharge voltage is 1-20kV.
Further, in step S4, the inner surface of the titanium alloy tube is spaced from the surface of the magnetic collector by 1mm, and the inner surface of the titanium alloy tube is wrapped with an insulating tape to prevent gap discharge.
Compared with the prior art, the invention has the following effects: the invention has reasonable design, and the titanium alloy pipe is subjected to magnetic pulse bulging and is subjected to high-speed impact welding with the stainless steel pipe, so that the invention has the advantages of high bonding strength, good controllability, high efficiency, no need of complex process and severe working conditions, and solves the problems of welding effect and production flexibility of the titanium alloy and stainless steel pipe welded by adopting the prior art.
Description of the drawings:
FIG. 1 is a schematic front sectional view of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an embodiment of the present invention;
FIG. 3 is a schematic view of the position structure of the titanium alloy tube and the stainless steel tube in the embodiment of the present invention.
In the figure:
1-stainless steel tube; 2-a titanium alloy tube; 3-a helical tube coil; 4-a coil skeleton; 5-a magnetic collector; 6-a limiting block; 7-lateral fixing blocks; 8-lower positioning blocks; 9-side plate; 10-bolt; 11-upper positioning blocks; 12-a lock nut; 13-connecting studs; 14-a shaped coil; 15-a pulse capacitor; 16-a high voltage generator; 17-a high voltage switch; 18-a rectifier; 19-a current limiting resistor; 20-pipe positioning holes; 21-capacitor power supply system; 22-an arc handle; 23-drive the ring.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The welding of titanium alloy and stainless steel belongs to the field of dissimilar material welding, the chemical and physical properties of Ti and Fe have great difference, and Ti and Fe elements are easy to combine to form a brittle intermetallic compound, so that the performance of a joint is weakened. The invention provides a method for realizing high-strength metallurgical bonding of titanium alloy and a stainless steel tube by using a magnetic pulse welding technology, which has higher requirements on welding site conditions or welding process control in the prior art, and aims to solve the problems that intermetallic compounds are easy to generate on a welding interface for preparing the titanium alloy and the stainless steel tube in the prior art and the production flexibility is low.
The first embodiment is as follows: as shown in fig. 1-2, the magnetic pulse bulging connection device for titanium alloy-stainless steel pipes of the present invention comprises a coaxial positioning block in which a metal pipe to be formed is disposed, wherein the metal pipe to be formed is composed of a titanium alloy pipe 2 and a stainless steel pipe 1, the stainless steel pipe 2 is sleeved outside one end of the titanium alloy pipe 1, a gap is formed between the titanium alloy pipe 2 and the stainless steel pipe 1, and a portion of the titanium alloy pipe 2 extending into the stainless steel pipe 1 is a working area; a forming coil 14 is arranged in the working area of the titanium alloy pipe 2, a magnetic collector 5 is arranged between the forming coil 14 and the inner surface of the titanium alloy pipe 2, and the forming coil 14 is connected with a capacitor power supply system 21. When the device works, a capacitor power supply system is used for charging and discharging a forming coil, the titanium alloy pipe and the stainless steel pipe are subjected to high-speed impact welding in a magnetic pulse bulging mode, so that the titanium alloy pipe and the stainless steel pipe are metallurgically bonded with high strength, the bonding strength is high, the controllability is good, the efficiency is high, a complex process and severe working conditions are not needed, and the problems of welding effect and production flexibility of the titanium alloy and the stainless steel pipe welded by adopting the prior art are solved.
In this embodiment, the outer diameter of the titanium alloy pipe 2 is smaller than the inner diameter of the stainless steel pipe 1, and when the magnetic pulse connection is performed, the connection end of the titanium alloy pipe is located in the middle of the connection end of the stainless steel pipe.
In this embodiment, a tube positioning hole 20 having an axis extending along a transverse direction is formed in the coaxial positioning block, and the tube positioning hole 20 is a stepped hole; the titanium alloy pipe 2 is accommodated in the small-diameter section of the pipe positioning hole 20, and the stainless steel pipe 1 is accommodated in the large-diameter section of the pipe positioning hole 20.
In this embodiment, the forming coil 14 includes a coil frame 4, the spiral pipe coil 3 with a rectangular cross section is wound on the coil frame 4, and the outside of the spiral pipe coil 3 is wrapped with glass fiber cloth and fixed by epoxy resin glue. Preferably, the material of the helical tube coil is red copper.
In this embodiment, the magnetic collector 5 is a rotator with side seams, the cross section of the rotator is trapezoidal, the length of the inner surface is greater than that of the outer surface, and the inner diameter is slightly greater than the outer diameter of the formed coil.
In the embodiment, two axial ends of the coil framework 4 are respectively provided with a limiting block 6 and a lateral fixing block 7, the limiting block 6 is positioned at the lower end inside the titanium alloy pipe 2 and is arranged at one side of a coil outlet of the forming coil 14, and two side surfaces of the limiting block 6 are respectively attached to the coaxial positioning block and the coil framework 4; the lateral fixing block 7 is positioned in the stainless steel pipe 1, and the lateral fixing block 7 is attached to the surface of the magnetic collector 5, so that the position of the magnetic collector 5 is fixed.
In this embodiment, the magnetic collector 5, the forming coil 14 and the pipe to be formed are concentric.
In this embodiment, the limiting block 6 and the lateral fixing block 7 are both made of insulating materials, such as bakelite or resin materials.
In this embodiment, the limiting block 6 is a semi-cylinder, the lateral fixing block 7 is a stepped shaft, and one end of the lateral fixing block 7, which is far away from the magnetic collector 5, penetrates through the coaxial positioning block and extends outwards.
In this embodiment, the coaxial positioning block includes upper positioning block 11 and lower positioning block 8 that dock from top to bottom, the inside of upper positioning block 11 and lower positioning block 8 all is equipped with the arc wall that is used for with the external diameter matched with of waiting to take shape tubular product, and the arc wall of upper positioning block 11 and the arc wall of lower positioning block 8 splice from top to bottom and constitute the tubular product locating hole.
In this embodiment, the die surface of the lower positioning block 8 is distributed with thread countersunk holes extending vertically, the thread countersunk holes are internally screwed with connecting studs 13 penetrating through the upper positioning block 11, the upper ends of the connecting studs 13 are screwed with locking nuts 12, and the upper and lower positioning blocks are connected and fixed through the locking nuts and the connecting studs. The side of lower locating piece 8 is equipped with the curb plate 9 of pressure setting at 7 step faces of side direction fixed blocks, curb plate 9 is connected through bolt 10 with lower locating piece 8 to fix the side direction fixed block.
In this embodiment, in order to move the upper positioning block conveniently, arc handles 22 are fixed at two ends of the upper positioning block 11 respectively.
In this embodiment, the capacitor power supply system 21 includes a pulse capacitor 15, a high voltage generator 16, a high voltage switch 17, a rectifier 18, and a current limiting resistor 19, the forming coil 14 is connected to the pulse capacitor 15 through a wire, the pulse capacitor 15 is connected to the high voltage generator 16 through a wire, the high voltage switch 17 is connected in series to a wire connected between the pulse capacitor 15 and the forming coil 14, and the rectifier 18 and the current limiting resistor 19 are connected in series to a wire connected between the high voltage generator 16 and the pulse capacitor 15. When the pulse capacitor bank works, the pulse capacitor bank is charged through the charging system, and electric energy is stored in the pulse capacitor bank. Closing the high-voltage switch, instantly releasing the stored electric energy to the forming coil and generating pulse current, generating a strong pulse magnetic field around the forming coil, exciting induced eddy current in the titanium alloy pipe due to the electromagnetic induction law, wherein the direction of the current in the forming coil is opposite to the direction of the induced eddy current in the pipe, so that the magnetic fields generated by the titanium alloy pipe and the pipe interact to generate strong electromagnetic force, strengthening the magnetic field of the area to be connected of the pipe through the adjustment of the magnetic collector, changing the distribution of the electromagnetic force, and driving the titanium alloy pipe to rapidly generate plastic deformation outwards when the generated electromagnetic repulsion force reaches the yield strength of the metal pipe to be formed, so as to realize high-speed impact welding with the stainless steel pipe.
As shown in fig. 1 and 2, a magnetic pulse bulging connection method for titanium alloy-stainless steel pipes includes the following steps: (1) The shaped coil 14 with the magnetic collector 5 is placed inside the lower positioning block 8 and connected to the capacitor power supply system 21. (2) cleaning the working surface of the pipe to be formed: the to-be-connected surfaces of a stainless steel pipe 1 and a titanium alloy pipe 2 are polished and wiped by alcohol, the stainless steel pipe 1 and the titanium alloy pipe 2 are placed in an inner cavity of a coaxial positioning block, a coil framework 1 is matched with the titanium alloy pipe 2, the centers of a magnetic collector 5, a forming coil 14 and the to-be-formed pipe are coaxial, and then a side plate 9 and a lower positioning block 8 are connected by a bolt 10. (3) The limiting block 6 is placed on one side of a wire outlet of the forming coil 14, the magnetic collector 5 corresponds to a working area of the upper titanium alloy pipe 2, the lateral fixing block 7 is placed inside the stainless steel pipe 1 and is in surface contact with the magnetic collector 5, the connecting stud 13 is screwed into the lower positioning block 8 and then is placed into the upper positioning block 11, and the locking nut 12 is screwed. (4) The pulse capacitor 15 group is charged through a charging system, electric energy is stored in the pulse capacitor group 15, a high-voltage switch 17 is closed, the stored electric energy is instantly released to a forming coil 14 and generates pulse current, a strong pulse magnetic field is generated around the forming coil 14, induced eddy current is excited in the titanium alloy pipe 2 due to the electromagnetic induction law, the direction of the current in the forming coil 14 is opposite to the direction of the induced eddy current in the pipe, so that the magnetic fields generated by the two interact to generate strong electromagnetic force, the magnetic field of the pipe to be connected is enhanced through the adjustment of a magnetic collector, the distribution of the electromagnetic force is changed, when the generated electromagnetic repulsion force reaches the yield strength of the metal pipe to be formed, the titanium alloy pipe 2 is driven to rapidly expand outwards to generate bulging plastic deformation, high-speed impact welding is realized with the stainless steel pipe 1, and high-strength metallurgical combination is realized. (5) After discharging, firstly screwing down the locking nut 12 of the upper positioning block 11 and disassembling the upper positioning block 11, then screwing down the bolt 10 on the side plate 9 to separate the side plate 9 and the lower positioning block 8, taking out the lateral fixing block 7, and finally taking out the connected pipe along the axial direction. And then repeating the steps 1-5, and performing expansion joint process on the next group of titanium alloy and stainless steel pipes.
In this embodiment, the inner surface of the titanium alloy tube 2 is provided with an insulating layer, and the magnetic collector and the titanium alloy tube are as close as possible under the condition of ensuring insulation.
In this embodiment, in order to enhance the connection strength of the connection pipe, the titanium alloy pipe 2 may be annealed before connection, and the annealing temperature of the titanium alloy is set to be 500 to 750 ℃.
In this embodiment, the gap between the titanium alloy tube and the stainless steel tube is set to be 1.5-3mm.
In this embodiment, the material of the forming coil 14 and the magnetic collector 5 is red copper or copper alloy.
In this embodiment, the coaxial positioning block and the side plate are made of bakelite, epoxy resin and 45 steel.
Example two: as shown in fig. 3, the difference between the present embodiment and the first embodiment is: according to the material characteristics of titanium alloy and stainless steel, a magnetic pulse bulging principle is combined, and considering that the resistivity of titanium is relatively large, a layer of driving circular ring 23 is bonded on the inner surface of a working area of the titanium alloy pipe 2, the driving circular ring 23 is made of a metal material with low resistivity and low yield strength, the driving circular ring has high conductivity, and higher induced current can be obtained on the surface of the metal pipe according to an electromagnetic induction principle to obtain higher electromagnetic force, so that the bonding strength of an interface can be greatly improved under the same energy.
In this embodiment, the driving ring is connected to the titanium alloy tube by a metal adhesive, and the metal adhesive is acrylate glue or epoxy glue.
In this embodiment, the driving ring is a metal material having low resistivity and low yield strength, such as a 1-series aluminum alloy having resistivities of 2.65 Ω · cm and 1.67 Ω · cm, respectively, or annealed red copper. The thickness of the driving ring is 1-3mm, and is determined by skin depth and discharge frequency.
The invention has the advantages that:
(1) According to the invention, the titanium alloy pipe and the stainless steel pipe are subjected to high-speed impact welding in a magnetic pulse bulging mode, so that high-strength bonding between the titanium alloy pipe and the stainless steel pipe is realized;
(2) The method is carried out in a normal temperature environment, the temperature of the pipe does not need to be changed, the original structure of the surface of the pipe can be kept on the microstructure, and the comprehensive mechanicalness of the surface of the pipe is ensured; the stable and uniform radial volume force avoids local defects and ensures the uniformity of pipe connection; the heat affected zone of the welding seam of the magnetic pulse connection is small, so that the generation of intermetallic compounds is reduced; the connection process does not need strict field requirements, and the surface finish of the connecting pipe can be ensured through bulging connection;
(3) According to the invention, the discharge voltage and the pipe gap between the titanium alloy and the stainless steel pipe are reasonably adjusted, the impact speed of the titanium alloy pipe is controlled, the welding process can be controlled, and the welding effect can be accurately controlled. In addition, the magnetic field is regulated and controlled through the magnetic collector, so that the connection area can be controlled, and flexible production can be performed according to actual requirements;
(4) The invention has the advantages of simple structure, convenient operation, good controllability, good production flexibility, high efficiency and easy realization of production mechanization, and the whole connection process has no radiation, no waste gas and no condensed water.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a titanium alloy-stainless steel tubular product's magnetic pulse bulging connecting device which characterized in that: the forming device comprises a coaxial positioning block, wherein a metal pipe to be formed is arranged in the coaxial positioning block, the metal pipe to be formed comprises a titanium alloy pipe and a stainless steel pipe, the stainless steel pipe is sleeved outside one end of the titanium alloy pipe, a gap exists between the titanium alloy pipe and the stainless steel pipe, a forming coil is arranged in a working area of the titanium alloy pipe, a magnetic collector is arranged between the forming coil and the inner surface of the titanium alloy pipe, and the forming coil is connected with a capacitor power supply system.
2. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 1, characterized in that: a pipe positioning hole with an axis extending along the transverse direction is arranged in the coaxial positioning block and is a stepped hole; the titanium alloy pipe is accommodated in the small-diameter section of the pipe positioning hole, and the stainless steel pipe is accommodated in the large-diameter section of the pipe positioning hole.
3. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 2, characterized in that: the forming coil comprises a coil framework, a spiral pipe coil with a rectangular cross section is wound on the coil framework, and glass fiber cloth is wrapped outside the spiral pipe coil and fixed by epoxy resin glue.
4. The magnetic pulse bulging connection device of titanium alloy-stainless steel tubing according to claim 3, characterized in that: the limiting blocks and the lateral fixing blocks are arranged at the two axial ends of the coil framework respectively, the limiting blocks are positioned at the lower end of the interior of the titanium alloy pipe and are arranged on one side of a coil outlet of the formed coil, and two side faces of the limiting blocks are attached to the coaxial positioning blocks and the coil framework respectively; the lateral fixing block is positioned in the stainless steel pipe and is attached to the surface of the magnetic collector.
5. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 4, characterized in that: stopper and side direction fixed block are made by insulating material, and the stopper is the halfcylinder form, and the side direction fixed block is the ladder shaft form, and the one end that the magnetism collection ware was kept away from to the side direction fixed block runs through coaxial locating piece and outwards extends.
6. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 5, characterized in that: the coaxial positioning block comprises an upper positioning block and a lower positioning block which are in butt joint up and down, arc-shaped grooves used for being matched with the outer diameter of a pipe to be formed are arranged in the upper positioning block and the lower positioning block, and the arc-shaped grooves of the upper positioning block and the arc-shaped grooves of the lower positioning block are spliced up and down to form a pipe positioning hole.
7. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 6, characterized in that: the die joint surface of the lower positioning block is distributed with a thread countersunk hole which extends along the vertical direction, a connecting stud penetrating through the upper positioning block is screwed in the thread countersunk hole, and the upper end of the connecting stud is screwed with a locking nut; a side plate pressed on the step surface of the lateral fixed block is arranged at the side end of the lower positioning block, and the side plate is connected with the lower positioning block through a bolt; and arc handles are respectively fixed at two ends of the upper positioning block.
8. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 1, characterized in that: the capacitor power supply system comprises a pulse capacitor, a high-voltage generator, a high-voltage switch, a rectifier and a current-limiting resistor, wherein the forming coil is connected with the pulse capacitor through a wire, the pulse capacitor is connected with the high-voltage generator through a wire, the high-voltage switch is connected in series on the wire connected between the pulse capacitor and the forming coil, and the rectifier and the current-limiting resistor are connected in series on the wire connected between the high-voltage generator and the pulse capacitor.
9. The magnetic pulse bulging connection device of titanium alloy-stainless steel pipes according to claim 1, characterized in that: a layer of driving circular ring is bonded on the inner surface of the working area of the titanium alloy pipe, and the driving circular ring is made of a metal material with low resistivity and low yield strength.
10. A magnetic pulse bulging connection method of titanium alloy-stainless steel pipes is characterized in that: a magnetic pulse bulging connection device comprising the titanium alloy-stainless steel pipe according to any one of claims 1 to 9, comprising the steps of:
step S1: polishing the surfaces to be connected of the titanium alloy pipe and the stainless steel pipe to remove an oxide layer and impurities;
step S2: sequentially and coaxially placing the formed coil, the magnetic collector, the titanium alloy pipe and the stainless steel pipe in the lower positioning block from inside to outside, wherein a gap exists between the titanium alloy pipe and the stainless steel pipe;
and step S3: the upper positioning block and the lower positioning block are butted and locked up and down, and the side plate is fixed at the side end of the lower positioning block, so that the coil, the magnetic collector, the titanium alloy pipe and the stainless steel pipe are fixed;
and step S4: and a capacitor power supply system is used for charging and discharging the formed coil, so that the titanium alloy pipe expands outwards to generate bulging plastic deformation and collides with the stainless steel pipe at a high speed, and high-strength metallurgical bonding is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211701246.2A CN115846525A (en) | 2022-12-29 | 2022-12-29 | Magnetic pulse bulging connection device and method for titanium alloy-stainless steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211701246.2A CN115846525A (en) | 2022-12-29 | 2022-12-29 | Magnetic pulse bulging connection device and method for titanium alloy-stainless steel pipe |
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| CN115846525A true CN115846525A (en) | 2023-03-28 |
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| CN202211701246.2A Pending CN115846525A (en) | 2022-12-29 | 2022-12-29 | Magnetic pulse bulging connection device and method for titanium alloy-stainless steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753372A (en) * | 2023-08-21 | 2023-09-15 | 成都飞机工业（集团）有限责任公司 | Shape piping joint and connection method thereof |
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2022
- 2022-12-29 CN CN202211701246.2A patent/CN115846525A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753372A (en) * | 2023-08-21 | 2023-09-15 | 成都飞机工业（集团）有限责任公司 | Shape piping joint and connection method thereof |
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