CN111451354B - Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof - Google Patents
Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof Download PDFInfo
- Publication number
- CN111451354B CN111451354B CN202010228885.6A CN202010228885A CN111451354B CN 111451354 B CN111451354 B CN 111451354B CN 202010228885 A CN202010228885 A CN 202010228885A CN 111451354 B CN111451354 B CN 111451354B
- Authority
- CN
- China
- Prior art keywords
- fluid
- coil
- forming
- electromagnetic
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses an electromagnetic-fluid impact composite forming device for a pipe fitting and a forming method thereof. The invention integrates the advantages of high precision of fluid forming, high speed of electromagnetic forming and easy arrangement of coils according to deformation requirements, and can realize high-precision deformation of difficult-deformation areas of difficult-deformation materials (such as aluminum alloy, magnesium alloy, titanium alloy and the like).
Description
Technical Field
The invention relates to the technical field of material processing and forming, in particular to an electromagnetic-fluid impact composite forming device for a pipe fitting and a forming method thereof.
Background
The tube fluid forming technique is generally a technique in which a tube blank is used as a raw material, and fluid pressure is applied to a tube cavity to cause plastic deformation in a given mold cavity, so that the tube wall is attached to the inner surface of the mold, thereby obtaining a part with a desired shape. Compared with the traditional forming method, the fluid forming part has good surface quality and high dimensional precision, and is widely applied to forming of parts in the fields of automobiles, aviation, aerospace and the like. But the fluid forming speed is slow, so that the method is a low-speed forming method. In addition, in the forming process, the fluid forces applied to different areas of the pipe fitting are uniformly distributed, and the stress distribution of different areas of the pipe fitting is not easy to adjust according to the deformation requirement.
The electromagnetic forming technology is a high-speed, high-energy-rate, short-time pulse processing technology which utilizes the electromagnetic force action of metal in a strong pulse magnetic field to make the metal generate plastic deformation. Research shows that the material can obtain forming performance higher than that of traditional punching under high speed deformation condition, and this higher forming performance is called high plasticity. Under high-speed impact, the material generates quasi-static deformation behavior different from that of the traditional processing method, and dynamic behavior, namely crystal twinning, tissue phase change, adiabatic shearing and the like, of the material under the impact of deformation elastic waves and plastic waves occurs. Therefore, the forming limit of the material difficult to deform can be effectively improved, and the springback and the like can be effectively reduced. However, in the conventional electromagnetic forming, the deformation speed of the pipe fitting under the action of electromagnetic force is too high, so that the forming process is difficult to regulate and control, and the precise shape control of parts is difficult to realize.
Disclosure of Invention
The invention aims to provide an electromagnetic-fluid impact composite forming device for a pipe fitting and a forming method thereof, so as to solve the problems.
In order to achieve the above purpose, the present invention first discloses an electromagnetic-fluid impact composite forming device for a pipe fitting, which comprises a mold, wherein a forming hole capable of fitting the pipe fitting is arranged in the mold, a forming cavity is arranged on a side wall of the forming hole, an expansion coil which is arranged in the pipe fitting and is opposite to the forming cavity is arranged in the forming hole, a sealing element for sealing the forming hole is detachably arranged on at least one side of the forming hole, and a fluid injection hole for injecting fluid into the forming hole is arranged on the sealing element.
Further, still include coil support and coaxial support frame, the bulging coil hoop is installed on the coil support, the coil support install coaxial support frame is so that the bulging coil with the pipe fitting is coaxial to be set up.
Furthermore, the coaxial support frame comprises support blocks arranged on two sides of the coil support frame, the support blocks are coaxially inserted in the pipe fitting, and a fluid passage for fluid to pass through is arranged on each support block.
Further, the sealing element comprises a first pushing block and a second pushing block which are made of metal materials, the first pushing block and the second pushing block are respectively connected to two ends of the forming hole in a sealing and sliding mode, and side pushing coils are arranged on the outer sides of the first pushing block and the second pushing block.
Further, the fluid is a liquid or a gas.
Further, the first pushing block and/or the second pushing block comprise an electric conduction layer close to the side pushing coil and a forming layer close to the fluid, the electric conduction layer is higher in electric conductivity than the forming layer, and the strength of the electric conduction layer is lower than that of the forming layer.
Further, the electric conduction layer is a pure copper layer or a pure aluminum layer, and the molding layer is a metal iron layer or an aluminum alloy layer.
Further, the bulging coil device further comprises a bulging coil discharging circuit for discharging to the bulging coil, and a lead of the bulging coil discharging circuit is connected with the bulging coil through the first push block and/or the second push block in a sealing mode.
Then, the invention discloses an electromagnetic-fluid impact composite forming method for a pipe fitting, which comprises the electromagnetic forming device for forming the fluid impact plate material, and comprises the following steps:
s1, placing the pipe fitting into the forming hole;
s2, installing the bulging control coil into the pipe fitting in the forming hole, and controlling the bulging coil to discharge and form;
s3, sealing the forming hole, and injecting fluid to fill the pipe fitting with the fluid;
and S4, applying quasi-static fluid force to the pipe fitting through the fluid injection hole to enable the pipe fitting to be attached to the wall surface of the forming cavity.
Then, the invention discloses an electromagnetic-fluid impact composite forming method for a pipe fitting, which comprises the electromagnetic forming device for forming the fluid impact plate material, and comprises the following steps:
s1, placing the pipe fitting in a forming hole containing fluid;
s2, controlling the bulging coil and the side pushing coil to simultaneously exert electromagnetic force, driving the pipe fitting to deform at a high rate by the bulging coil, and driving the first pushing block and/or the second pushing block to extrude the fluid to drive the pipe fitting to deform at a high rate by the side pushing coil.
Compared with the prior art, the invention has the advantages that:
1. when the invention adopts the method of coil discharge first and then quasi-static fluid sizing. The coil discharges to firstly deform the difficult deformation area formed by the traditional fluid, and then the formed part is controlled by the fluid forming. Therefore, the invention combines the advantages of high precision of fluid forming, high speed of electromagnetic forming and easy arrangement of coils according to deformation requirements, and can realize high-precision deformation of difficult-deformation areas of difficult-deformation materials (such as aluminum alloy, magnesium alloy, titanium alloy and the like).
2. When the method for simultaneously driving the pipe fitting to deform by coil discharge and high-speed fluid is adopted, the integral high-speed deformation of the pipe fitting is realized. The forming limit and forming efficiency of the material can be greatly improved.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an initial stage of discharging of an electromagnetic-fluid impact composite forming apparatus for pipe according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a deformation of a pipe when discharging in an electromagnetic-fluid impact composite forming apparatus for a pipe according to an embodiment of the present invention;
FIG. 3 is a schematic view of a fluid-proofed pipe assembly of an electromagnetic-fluid impact composite forming apparatus for a pipe assembly according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating pipe deformation results of an electromagnetic-fluid impact composite forming apparatus for pipe according to an embodiment of the present invention;
FIG. 5 is a schematic view illustrating an installation of a coil support and a coaxial support of an electromagnetic-fluid impact composite forming apparatus for pipe according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an electrical initial stage of an electromagnetic-fluid impact composite forming apparatus for pipe according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating deformation results of electromagnetic and fluid synchronous actions on a pipe in an electromagnetic-fluid impact composite forming apparatus for a pipe according to a second embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a first push block and a second push block of the electromagnetic-fluid impact composite forming apparatus for pipe fittings according to the second embodiment of the present disclosure;
fig. 9 is a schematic circuit connection diagram of an electromagnetic-fluid impact composite forming apparatus for pipe according to the second embodiment of the present invention.
Illustration of the drawings:
1. a mold; 2. a pipe fitting; 3. bulging coils; 4. a coil support; 5. a first push block; 51. an electrically conductive layer; 52. a molding layer; 6. a second push block; 7. a fluid; 8. a fluid injection port; 9. laterally pushing the coil; 10. forming a hole; 11. a forming cavity; 12. a coaxial support frame; 13. a fluid channel; 14. a support block; 15. and (4) air holes.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
as shown in fig. 1-5, the embodiment of the present invention first discloses an electromagnetic-fluid impact composite forming device for a pipe fitting, comprising a mold 1, a forming hole 10 capable of fitting the outer wall of the pipe fitting 2 is arranged in the mold 1, a forming cavity 11 is arranged on the side wall of the forming hole 10, the inner side wall of the pipe fitting 2 will expand outward by electromagnetic force during the forming process and finally fits the bottom surface of the forming cavity 11, an outward through air hole 15 is arranged in the forming cavity 11 for exhausting air when the pipe wall expands outward by electromagnetic force, an expansion coil 3 arranged in the pipe fitting 2 and opposite to the forming cavity 11 is arranged in the forming hole 10, the expansion coil 3 is an electromagnetic forming coil, a sealing member for sealing the forming hole 10 is detachably arranged on at least one side of the forming hole 10, i.e. the forming hole 10 can be in the form of a counter bore or a through hole, a fluid injection hole 8 for injecting a fluid 7 into the forming hole 10 is arranged on the sealing member, in this embodiment, the fluid 7 is a liquid, such as water or hydraulic oil, or a gas, such as air with high or low temperature.
In this embodiment, the coil support device further includes a coil support 4, the bulging coil 3 is annularly installed on the coil support 4, the power transmission line of the bulging coil 3 is connected with an external bulging coil discharge circuit through a sealing member from inside the pipe 2, in order to enable the coil support 4 to be installed in a suspended manner, and ensure coaxial installation of the bulging coil 3 and the pipe 2, so as to facilitate uniform formation of the pipe 2, the coil support 4 is installed on a coaxial support frame 12, the coaxial support frame 12 includes cylindrical support blocks 14 fixedly connected to both sides of the coil support 4, the support blocks 14 are in seamless sliding connection with an inner hole of the pipe 2, the coaxial support frame 12 is directly pushed to a fixed position into the pipe 2 during installation, and meanwhile, in order to ensure that the fluid 7 flows left and right of the support blocks 14 to transfer pressure, the support blocks 14 are further provided with fluid channels 13, and the fluid channels 13 may also be through holes circumferentially penetrating through the support blocks 14, the outer edge of the supporting block 14 may be grooved.
In a specific forming process, the bulging coil 3 is adopted to discharge electricity to a local area of the pipe fitting 2, so that the local area (a fluid forming hard-deformation area) of the pipe fitting 2 is deformed firstly, and the peripheral area of the local area is deformed under the action of a dragging force. The pipe 2 is then placed in the mould 1 containing the fluid 7 and fluid force is applied to the forming orifice 10 through the fluid injection orifice 8 to bring the pipe 2 into full abutment with the bottom surface of the forming chamber 11.
Example two:
as shown in fig. 6 to 9, the electromagnetic-fluid impact composite forming apparatus for pipe members according to the embodiment of the present invention is substantially the same as the first embodiment except that: the sealing member includes first ejector pad 5 and second ejector pad 6 of metal material, first ejector pad 5 and second ejector pad 6 are sealed the both ends of sliding connection at shaping hole 10 respectively, the outside of 6 at least one of first ejector pad and 5 second ejector pad is provided with side push coil 9, in this embodiment, the outside of first ejector pad 5 and second ejector pad 6 all is provided with side push coil 9, side push coil 9 is the electromagnetic forming coil, thereby, can seal the setting after fluid injection hole 8 injects the fluid, act on the pressure extrusion fluid 7 of first ejector pad 5 and second ejector pad 6 through side push coil 9, and then drive pipe fitting 2 high-speed deformation.
Specifically, the first pushing block 5 and the second pushing block 6 comprise a forming electric conduction layer 51 close to the side pushing coil 9 and a forming layer 52 close to the fluid 7, the electric conduction layer 51 is higher in electric conductivity than the forming layer 52, and the strength of the electric conduction layer 51 is lower than that of the forming layer 52, so that the formation of a larger electromagnetic force on the first pushing block 5 and the second pushing block 6 is ensured, the electric conduction layer 51 is a pure copper layer or a pure aluminum layer, the texture is softer but high in electric conductivity, a larger electromagnetic force can be formed, the forming layer 52 is a metal iron layer or an aluminum alloy layer, the electric conductivity is relatively smaller, but the texture is harder, the strength is high, and the deformation is difficult, and the fluid leakage caused by the deformation is avoided. Meanwhile, the strength of the whole first pushing block 5 and the second pushing block 6 is improved, and deformation is prevented.
In a specific forming process, the bulging coil 3 and the side push coil 9 are respectively arranged, and the side push coil 9 drives the first push block 5 and the second push block 6 to extrude fluid to impact the pipe fitting 2 at a high speed, so that the pipe fitting 2 is deformed rapidly with high precision under the combined action of electromagnetic force and high-speed fluid.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The electromagnetic-fluid impact composite forming device for the pipe fitting comprises a die (1) and is characterized in that a forming hole (10) which can be attached to the pipe fitting (2) is formed in the die (1), a forming cavity (11) is formed in the side wall of the forming hole (10), an expansion coil (3) which is arranged in the pipe fitting (2) and opposite to the forming cavity (11) is arranged in the forming hole (10), a sealing element which is used for sealing the forming hole (10) is detachably arranged on at least one side of the forming hole (10), a fluid injection hole (8) which is used for injecting fluid (7) into the forming hole (10) is formed in the sealing element, the electromagnetic-fluid impact composite forming device further comprises a coil support (4) and a coaxial support frame (12), the expansion coil (3) is annularly arranged on the coil support (4), and the coil support (4) is arranged on the coaxial support frame (12) so that the expansion coil (3) and the coaxial support frame (12) can enable the expansion coil (3) to be attached to the pipe fitting The pipe fittings (2) are coaxially arranged, the coaxial support frame (12) comprises support blocks (14) arranged on two sides of the coil support (4), the support blocks (14) are coaxially inserted in the pipe fittings (2), and fluid channels (13) for passing fluids (7) are arranged on the support blocks (14); the sealing element comprises a first pushing block (5) and a second pushing block which are made of metal materials, the first pushing block (5) and the second pushing block are respectively connected to two ends of the forming hole (10) in a sealing and sliding mode, and side pushing coils (9) are arranged on the outer sides of the first pushing block (5) and the second pushing block.
2. An electromagnetic-fluid impingement composite forming apparatus for tubes according to claim 1, characterized in that the fluid (7) is a liquid or a gas.
3. An electromagnetic-fluid impingement composite forming apparatus for a tube according to claim 1, characterized in that the first pusher (5) and/or the second pusher comprises an electrically conductive layer (51) adjacent to the side-pushing coil (9) and a formed layer (52) adjacent to the fluid (7), the electrically conductive layer (51) having a greater electrical conductivity than the formed layer (52) and the electrically conductive layer (51) having a lower strength than the formed layer (52).
4. An electromagnetic-fluid impingement composite forming apparatus for pipe elements according to claim 3, wherein the electrically conductive layer (51) is a pure copper layer or a pure aluminum layer and the forming layer (52) is a metallic iron layer or an aluminum alloy layer.
5. An electromagnetic-fluid impact composite forming apparatus for pipe according to claim 1, further comprising a bulging coil discharging circuit that discharges the bulging coil (3), wherein a wire seal of the bulging coil discharging circuit is connected with the bulging coil (3) through the first push block (5) and/or the second push block.
6. An electromagnetic-fluid impact composite forming method for a pipe member, comprising the electromagnetic-fluid impact composite forming apparatus for a pipe member according to any one of claims 1 to 5, characterized by comprising the steps of:
s1, placing the pipe (2) into the forming hole (10);
s2, installing the bulging coil (3) into the pipe fitting (2) in the forming hole (10), and controlling the bulging coil (3) to be formed in an electric discharge mode;
s3, sealing the forming hole (10), and injecting a fluid (7) to fill the pipe fitting (2) with the fluid (7);
and S4, applying quasi-static fluid force to the pipe (2) through the fluid injection hole (8) to enable the pipe (2) to be attached to the wall surface of the forming cavity (11).
7. An electromagnetic-fluid impact composite forming method for a pipe member, comprising the electromagnetic-fluid impact composite forming apparatus for a pipe member according to any one of claims 1 to 5, characterized by comprising the steps of:
s1, placing the pipe (2) in a forming hole (10) containing the fluid (7);
s2, controlling the bulging coil (3) and the side pushing coil (9) to exert electromagnetic force simultaneously, driving the pipe fitting (2) to deform at a high speed by the bulging coil (3), and driving the first push block (5) and/or the second push block to extrude the fluid (7) to drive the pipe fitting (2) to deform at a high speed by the side pushing coil (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228885.6A CN111451354B (en) | 2020-03-27 | 2020-03-27 | Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228885.6A CN111451354B (en) | 2020-03-27 | 2020-03-27 | Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111451354A CN111451354A (en) | 2020-07-28 |
| CN111451354B true CN111451354B (en) | 2022-05-27 |
Family
ID=71672535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010228885.6A Active CN111451354B (en) | 2020-03-27 | 2020-03-27 | Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111451354B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275888A (en) * | 2020-09-07 | 2021-01-29 | 华中科技大学 | Electromagnetic electro-hydraulic composite forming method and device |
| CN113182446B (en) * | 2021-05-13 | 2023-05-16 | 中南大学 | Current-assisted electromagnetic forming device and forming method for metal pipe fitting |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3447350A (en) * | 1964-06-10 | 1969-06-03 | Siemens Ag | Method and device for the magnetic forming of metallic workpieces |
| JPS55109522A (en) * | 1979-02-14 | 1980-08-23 | Inoue Japax Res Inc | Electromagnetic forming apparatus |
| US4557128A (en) * | 1982-01-27 | 1985-12-10 | Costabile John J | Apparatus for producing a bulge in thin metal material |
| US5826320A (en) * | 1997-01-08 | 1998-10-27 | Northrop Grumman Corporation | Electromagnetically forming a tubular workpiece |
| CN103861933A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device |
| KR20160077289A (en) * | 2014-12-22 | 2016-07-04 | 주식회사 포스코 | Forming apparatus |
| EP3132868A1 (en) * | 2015-08-17 | 2017-02-22 | Moravia Cans a.s. | Tool for electromagnetic forming of containers with relief protrusion |
| CN107052128A (en) * | 2017-04-14 | 2017-08-18 | 湘潭大学 | Breadth light alloy plate gas expansion forming device and manufacturing process based on electromagnetic pulse |
| CN108188246A (en) * | 2018-02-09 | 2018-06-22 | 华中科技大学 | A kind of metal tube building mortion and method based on through-flow pattern |
| CN109759491A (en) * | 2019-03-04 | 2019-05-17 | 燕山大学 | A kind of the pipe fitting swelling pressure forming device and process of magneto-rheological grease auxiliary |
| CN109967593A (en) * | 2019-03-18 | 2019-07-05 | 三峡大学 | A kind of device and method for realizing that pipe fitting Electromagnetic bulging is compressed axially using radially constant magnetic field and inductive loop |
-
2020
- 2020-03-27 CN CN202010228885.6A patent/CN111451354B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3447350A (en) * | 1964-06-10 | 1969-06-03 | Siemens Ag | Method and device for the magnetic forming of metallic workpieces |
| JPS55109522A (en) * | 1979-02-14 | 1980-08-23 | Inoue Japax Res Inc | Electromagnetic forming apparatus |
| US4557128A (en) * | 1982-01-27 | 1985-12-10 | Costabile John J | Apparatus for producing a bulge in thin metal material |
| US5826320A (en) * | 1997-01-08 | 1998-10-27 | Northrop Grumman Corporation | Electromagnetically forming a tubular workpiece |
| CN103861933A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device |
| KR20160077289A (en) * | 2014-12-22 | 2016-07-04 | 주식회사 포스코 | Forming apparatus |
| EP3132868A1 (en) * | 2015-08-17 | 2017-02-22 | Moravia Cans a.s. | Tool for electromagnetic forming of containers with relief protrusion |
| CN107052128A (en) * | 2017-04-14 | 2017-08-18 | 湘潭大学 | Breadth light alloy plate gas expansion forming device and manufacturing process based on electromagnetic pulse |
| CN108188246A (en) * | 2018-02-09 | 2018-06-22 | 华中科技大学 | A kind of metal tube building mortion and method based on through-flow pattern |
| CN109759491A (en) * | 2019-03-04 | 2019-05-17 | 燕山大学 | A kind of the pipe fitting swelling pressure forming device and process of magneto-rheological grease auxiliary |
| CN109967593A (en) * | 2019-03-18 | 2019-07-05 | 三峡大学 | A kind of device and method for realizing that pipe fitting Electromagnetic bulging is compressed axially using radially constant magnetic field and inductive loop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111451354A (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111451354B (en) | Electromagnetic-fluid impact composite forming device for pipe fitting and forming method thereof | |
| CN106216481B (en) | A kind of big section difference odd-shaped cross section pipe fitting swelling pressure combined shaping method | |
| CN103464562B (en) | Cavity low-internal-pressure manufacturing process | |
| CN105562516A (en) | Charging pressing forming method for variable-cross-section special-shaped pipe | |
| CN109848280B (en) | Partitioned electromagnetic forming method and forming device for corrugated pipe | |
| CN109759491B (en) | Magnetorheological grease assisted pipe fitting expansion forming device and process method | |
| CN105665510A (en) | Board drawing forming device and method based on electrorheological fluid | |
| CN102962309A (en) | Forming method and device for thin-wall T-pipe | |
| CN105855336B (en) | Car body of aluminum alloy abnormal shape variable cross-section tubing structural member thermo shaping method | |
| CN104353718B (en) | A kind of sheet material bag draws the method for building mortion and shaping | |
| CN104785605A (en) | Electro-hydraulic forming device for pipe fitting and forming method | |
| CN111531031B (en) | Complex curved surface component forming device and method based on magnetorheological elastomer | |
| CN102734589B (en) | High positive and negative pressure-resistant polytetrafluoroethylene-metal composite compensator and manufacturing method thereof | |
| CN109590371A (en) | A kind of quasi-static punching press compound molding device of electromagnetism-electric detonation-of large-sized sheet material and method | |
| CN111604402A (en) | Aluminum alloy sheet precise shaping method and device based on electro-hydraulic forming | |
| CN106270102A (en) | A kind of method mating internal high pressure forming threeway overpressure and feeding relation | |
| CN110000271A (en) | A kind of bellows electromagnetic pulse forming device and method | |
| CN109676000B (en) | A kind of deep camber thin-wall member resisting medium external pressure shaping device | |
| CN101862782B (en) | Method for forming diameter-variable parts by viscoelastic-plastic flexible die | |
| CN109759492B (en) | Magnetorheological fluid segmented control magnesium alloy pipe internal high-pressure hot forming device and method | |
| CN114042798A (en) | Magnetorheological fluid soft mold forming method and device for deep-cavity thin-wall component | |
| CN114904955A (en) | Back pressure controllable type magnetorheological fluid auxiliary plate forming method and device | |
| CN212442763U (en) | Magnetorheological elastomer and hydraulic combined pipe fitting forming device | |
| CN109277445A (en) | A kind of metal bellows fluid pressure forming device and method | |
| CN114798887A (en) | Servo double-pipe water expansion equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |