CN112317594A - Magnetic collector for pipe electromagnetic pulse forming - Google Patents
Magnetic collector for pipe electromagnetic pulse forming Download PDFInfo
- Publication number
- CN112317594A CN112317594A CN202011310994.9A CN202011310994A CN112317594A CN 112317594 A CN112317594 A CN 112317594A CN 202011310994 A CN202011310994 A CN 202011310994A CN 112317594 A CN112317594 A CN 112317594A
- Authority
- CN
- China
- Prior art keywords
- hole
- coil
- collector
- magnetic
- work area
- 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.)
- Granted
Links
- 230000005389 magnetism Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims 5
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to a pipe fitting electromagnetic pulse forming magnetic collector which comprises a magnetic collector main body, wherein hole grooves are correspondingly formed in the upper end surface and the lower end surface of the magnetic collector main body, a through hole penetrating through the two hole grooves is formed between the bottoms of the upper hole groove and the lower hole groove to form a work area for forming a workpiece, a coil placing hole penetrating through the upper end surface and the lower end surface of the magnetic collector main body is formed beside the work area, the coil placing hole is communicated with the work area through a narrow slit plane, and the narrow slit plane passes through the coil placing hole and the central axis of the work area. The magnetic collector is simple in structure, easy to realize, and beneficial to reducing the size of the coil and prolonging the service life of the coil.
Description
Technical Field
The invention belongs to the technical field of electromagnetic pulse forming, and particularly relates to a magnetic collector for electromagnetic pulse forming of a pipe fitting.
Background
The basic principle of the metal pipe electromagnetic pulse forming technology is that a capacitor group is used for discharging a formed coil, and rapidly changing current flows through the coil to generate a transient strong magnetic field, so that eddy current is formed on the surface of a metal pipe placed in the coil, and deformation is generated under the action of electromagnetic force. In this technique, a magnetic concentrator is also a secondary processing device that is often used.
One typical existing concentrator structure is: the shape is a cylinder; digging two symmetrical truncated cone-shaped concave parts respectively by taking the axis of the cylinder as an axis and taking the two bottom surfaces of the cylinder as lower bottom surfaces; the upper bottom surfaces of the two truncated cone-shaped depressions are connected by a cylindrical through hole, and the diameter of the cross section of the through hole is the same as that of the upper bottom surface of the truncated cone; a cutting slit along the radius direction is arranged at a certain position on the circumference of the magnetic collector, and the closed ring of the magnetic collector is cut off to form a C-shaped unclosed ring body. The radial section of the typical magnetic collector is similar to an isosceles trapezoid, and the working principle is as follows: the eddy current collector is arranged inside a solenoid coil, eddy current is induced on the outer surface of the magnetic collector and flows to the surface of an inner hole through a cutting seam to form a loop, and the axial length of the surface of the inner hole is far smaller than that of the outer wall, so that the current density of the surface of the inner hole is greatly improved, and the magnetic field is correspondingly enhanced. The typical magnetic collector has a simple structure and is convenient and fast to manufacture, but belongs to an integral magnetic collector which cannot be disassembled due to the blocking of an external coil, and has certain limitation. And the volume of external coil is great, and the cost is very high, and during operation, the coil can be by the bulging, and is great to the coil harm.
Disclosure of Invention
The invention aims to provide a magnetic collector for electromagnetic pulse forming of a pipe fitting, which is simple in structure and easy to realize, and is beneficial to reducing the size of a coil and prolonging the service life of the coil.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a pipe fitting electromagnetic pulse takes shape with collection magnetism ware, includes collection magnetism ware main part, correspond on the upper and lower both ends face of collection magnetism ware main part and seted up the hole groove, set up the through-hole that link up two hole grooves between the upper and lower hole tank bottoms portion, form the work area that the work piece takes shape, the coil that runs through collection magnetism ware main part upper and lower terminal surface is seted up to the work area side and is placed the hole, the coil is placed and is communicated with each other through a slot plane between hole and the work area, the central axis that hole and work area were placed through the coil in slot plane.
The high-voltage generator is connected with the forming coil after being connected with the diode, the current-limiting resistor and the high-voltage switch in series through a lead, and the pulse capacitor is connected with the forming coil and two ends of the high-voltage switch in parallel.
Furthermore, the narrow slit plane penetrates through the upper end face and the lower end face of the magnetic collector main body.
Further, the aperture and the depth of the two hole grooves are the same, and the through hole is a cylindrical through hole.
Further, one of the two bore slots has a greater depth than the other bore slot to form an offset working area.
Furthermore, in the two hole grooves, the hole diameter of one hole groove is larger than that of the other hole groove, so that a working area with different hole diameters at two ends is formed.
Further, the through hole is a truncated cone-shaped through hole to form a truncated cone-shaped working area.
Furthermore, the two hole grooves are both truncated cone-shaped hole grooves with large end faces and small bottoms, so that a working area with two ends as bell mouths is formed.
Further, the magnetic collector body is made of chromium zirconium copper.
Compared with the prior art, the invention has the following beneficial effects: the invention provides a magnetic collector for electromagnetic pulse forming of a pipe fitting, which is simple in structure and easy to manufacture, and can realize diameter reduction of a workpiece by using a bulging coil, so that the size of the coil is greatly reduced. Therefore, the invention has strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic concentrator according to a first embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1 at H.
Fig. 3 is a sectional view a-a of fig. 1.
FIG. 4 is a schematic diagram of a magnetic pulse welding system including a magnetic concentrator in accordance with an embodiment of the present invention.
Fig. 5 is a schematic diagram of the operation of the magnetic concentrator according to the first embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a magnetic concentrator according to a second embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a magnetic concentrator according to a third embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a magnetic concentrator according to a fourth embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a magnetic concentrator according to a fifth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 5, an embodiment of the present invention provides a pipe electromagnetic pulse forming magnetic collector, including a magnetic collector main body 6, where the magnetic collector main body 6 is correspondingly provided with hole slots 10 on upper and lower end surfaces, a through hole 11 penetrating through the two hole slots is provided between bottoms of the upper and lower hole slots 10 to form a working area for forming a workpiece 12, a coil placing hole 7 penetrating through the upper and lower end surfaces of the magnetic collector main body is provided at a side of the working area, the coil placing hole 7 is communicated with the working area 11 through a narrow slit plane 9 penetrating through the upper and lower end surfaces of the magnetic collector main body, and the narrow slit plane 9 passes through central axes of the coil placing hole 7 and the working area 11.
The invention is also provided with a high voltage generator 1, a diode 2, a current limiting resistor 3, a high voltage switch 4, a pulse capacitor 5 and a forming coil 8 to form a magnetic pulse welding system with a magnetic collector 6. The forming coil 8 is arranged in the coil placing hole 7, the high-voltage generator 1 is connected with the forming coil 8 after being connected with the diode 2, the current-limiting resistor 3 and the high-voltage switch 4 in series through a lead, and the pulse capacitor 5 is connected with two ends of the forming coil 8 and the high-voltage switch 4 in parallel.
In this embodiment, the two grooves 10 have the same diameter and depth, and the through hole 11 is a cylindrical through hole. The magnetic collector body 6 is made of chromium zirconium copper.
When in work, the magnetic collector is fixed by an insulating clamp, the diameter of the coil placing hole 7 is phi 50mm, the length is 100mm, the distance from the central axis of the working area 11 was 60mm, the length of the working area 11 was 46mm, the diameter was Φ 19mm, the width of the slit plane 9 was 0.3mm, 16 turns of the coil 8 (copper wire of 5 × 7) having an outer diameter of Φ 45mm were inserted into the coil-placing hole 7, then, a workpiece DL95 aluminum nose is clamped and placed in the working area 11, the capacitance of a forming machine is 125 muF, the discharging voltage is set to be 16kv, the capacitor is charged, a switch is closed, a coil discharges, induced current is induced on the surface of the coil placing hole 7, then the current flows to a working area through the narrow slit, the width of the working area is smaller than that of the coil placing hole, the current is superposed, the intensity of the induced current is enhanced, the magnetic field is correspondingly enhanced, the current is induced on the workpiece, and the generated Lorentz force reduces the diameter of the workpiece.
In the second embodiment, as shown in fig. 6, one of the two grooves has a greater depth than the other groove to form an offset working area.
As shown in fig. 7, in the third embodiment, one of the two slots has a larger aperture than the other slot, so as to form a working area with different apertures at two ends.
For some workpieces needing special clamping or workpieces needing magnetic field intensity gradient distribution, a structure with offset working areas or a structure with different apertures at two ends of the working areas can be adopted to achieve better forming effect.
As shown in fig. 8, in the fourth embodiment, the through hole is a truncated cone-shaped through hole to form a truncated cone-shaped working area. For some pipe fittings in the shape of a circular truncated cone, the structure of a working area in the shape of a circular truncated cone can be adopted, so that a better forming effect is achieved.
As shown in fig. 9, in the fifth embodiment, the two slots are both truncated cone-shaped slots with large end faces and small bottoms, so as to form a working area with two flared ends. For some workpieces with special structures, the structure can be adopted to achieve better forming effect.
The present invention is not limited to the above-described embodiments, and it should be understood that modifications and variations can be made by those skilled in the art without inventive faculty, based on the concept of the present invention. In summary, the technical solutions available to those skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. The utility model provides a pipe fitting electromagnetic pulse takes shape with collection magnetism ware, a serial communication port, including collection magnetism ware main part, corresponding on the upper and lower both ends face of collection magnetism ware main part has seted up the hole groove, has seted up the through-hole that link up two hole grooves between the upper and lower hole tank bottoms portion, forms the work area that the work piece takes shape, the work area side is seted up the coil that runs through collection magnetism ware main part upper and lower terminal surface and is placed the hole, the coil is placed and is communicated with each other through a slot plane between hole and the work area, the central axis that hole and work area were placed to the slot plane through the coil.
2. The collector according to claim 1, wherein a high voltage generator, a diode, a current limiting resistor, a high voltage switch, a pulse capacitor and a shaping coil are further provided to form a magnetic pulse welding system with the collector, the shaping coil is disposed in the coil-accommodating hole, the high voltage generator is connected to the shaping coil after the diode, the current limiting resistor and the high voltage switch are connected in series through a wire, and the pulse capacitor is connected in parallel to both ends of the shaping coil and the high voltage switch.
3. The collector according to claim 1, wherein said slit plane extends through upper and lower end surfaces of said collector body.
4. The pipe fitting magnetic concentrator for electromagnetic pulse forming according to claim 1, wherein the two grooves have the same diameter and depth, and the through hole is a cylindrical through hole.
5. The collector according to claim 1, wherein one of said two slots is deeper than the other slot to form an offset working area.
6. The collector according to claim 1, wherein one of said two slots has a larger diameter than the other slot to form a working area with different diameters at both ends.
7. The magnetic collector for pipe electromagnetic pulse shaping according to claim 1, wherein the through hole is a truncated cone shaped through hole to form a truncated cone shaped working area.
8. The pipe fitting electromagnetic pulse forming concentrator according to claim 1, wherein the two slots are both truncated cone-shaped slots with large end faces and small bottoms to form a working area with bell mouths at both ends.
9. The collector of claim 1 wherein said collector body is made of chromium zirconium copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011310994.9A CN112317594B (en) | 2020-11-20 | 2020-11-20 | Magnetic collector for electromagnetic pulse forming of pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011310994.9A CN112317594B (en) | 2020-11-20 | 2020-11-20 | Magnetic collector for electromagnetic pulse forming of pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112317594A true CN112317594A (en) | 2021-02-05 |
| CN112317594B CN112317594B (en) | 2024-07-26 |
Family
ID=74322040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011310994.9A Active CN112317594B (en) | 2020-11-20 | 2020-11-20 | Magnetic collector for electromagnetic pulse forming of pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112317594B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB954752A (en) * | 1962-02-15 | 1964-04-08 | Gen Dynamics Corp | Improved forming method and apparatus therefor |
| US20100275439A1 (en) * | 2007-04-27 | 2010-11-04 | Pablo Pasquale | Multiple tube processing coil |
| CN101905262A (en) * | 2010-07-29 | 2010-12-08 | 哈尔滨工业大学 | Magnetic concentrator structure for magnetic pulse formation |
| CN105013960A (en) * | 2015-08-20 | 2015-11-04 | 哈尔滨工业大学 | Tubular product magnetic pulse drawing-down shaping device and method based on bitter coil |
| CN110039168A (en) * | 2019-05-24 | 2019-07-23 | 福州大学 | A kind of pipe fitting magnetic pulse welding device and method |
| CN110681759A (en) * | 2019-09-29 | 2020-01-14 | 中南大学 | Universal electromagnetic forming device for plate-tube parts |
| CN210024096U (en) * | 2019-05-24 | 2020-02-07 | 福州大学 | Pipe fitting magnetic pulse welding set |
| CN213793691U (en) * | 2020-11-20 | 2021-07-27 | 福州大学 | Magnetic collector for electromagnetic pulse forming of pipe fitting |
-
2020
- 2020-11-20 CN CN202011310994.9A patent/CN112317594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB954752A (en) * | 1962-02-15 | 1964-04-08 | Gen Dynamics Corp | Improved forming method and apparatus therefor |
| US20100275439A1 (en) * | 2007-04-27 | 2010-11-04 | Pablo Pasquale | Multiple tube processing coil |
| CN101905262A (en) * | 2010-07-29 | 2010-12-08 | 哈尔滨工业大学 | Magnetic concentrator structure for magnetic pulse formation |
| CN105013960A (en) * | 2015-08-20 | 2015-11-04 | 哈尔滨工业大学 | Tubular product magnetic pulse drawing-down shaping device and method based on bitter coil |
| CN110039168A (en) * | 2019-05-24 | 2019-07-23 | 福州大学 | A kind of pipe fitting magnetic pulse welding device and method |
| CN210024096U (en) * | 2019-05-24 | 2020-02-07 | 福州大学 | Pipe fitting magnetic pulse welding set |
| CN110681759A (en) * | 2019-09-29 | 2020-01-14 | 中南大学 | Universal electromagnetic forming device for plate-tube parts |
| CN213793691U (en) * | 2020-11-20 | 2021-07-27 | 福州大学 | Magnetic collector for electromagnetic pulse forming of pipe fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112317594B (en) | 2024-07-26 |
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