CN112134120B - Manufacturing device for REBCO solenoid type inserted magnet joint terminal - Google Patents
Manufacturing device for REBCO solenoid type inserted magnet joint terminal Download PDFInfo
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- CN112134120B CN112134120B CN202011125235.5A CN202011125235A CN112134120B CN 112134120 B CN112134120 B CN 112134120B CN 202011125235 A CN202011125235 A CN 202011125235A CN 112134120 B CN112134120 B CN 112134120B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract
The invention discloses a device for manufacturing a REBCO solenoid type inserted magnet joint terminal, which comprises a supporting part and a heating part, wherein the supporting part is provided with a support part; the heating part comprises an adjusting mechanism, a heating pipe and a heating platform, the heating pipe and the heating platform are arranged on the adjusting mechanism, the adjusting mechanism comprises a screw rod, a heating pipe supporting platform and a heating platform supporting plate, the heating pipe supporting platform and the heating platform supporting plate are rotatably connected to the screw rod, the heating pipe supporting platform and the heating platform supporting plate are movably connected up and down on the screw rod, the heating pipe is located at the upper end of the heating pipe supporting platform, and the heating platform is located at the upper end of the heating platform supporting plate; the manufacturing device is simple in structure, easy and convenient to operate, wide in application range, high in degree of freedom and high in operability, can conveniently and quickly manufacture the joint terminal, improves the manufacturing quality of the joint terminal, and solves the problem that the critical performance of the solenoid type inserted magnet is degraded due to mechanical damage in the manufacturing process.
Description
Technical Field
The invention relates to the technical field of superconducting magnet joint terminal manufacturing equipment, in particular to a manufacturing device of a REBCO solenoid type inserted magnet joint terminal
Background
The high-temperature superconducting magnet has the characteristics of high stability, large current density, low operation cost, high critical magnetic field and the like, and has wide application prospects in the fields of high-intensity magnetic fields, fusion devices, nuclear magnetic resonance imaging, superconducting motors and the like.
At present, superconductors which can be used for winding the high-temperature superconducting magnet at home and abroad comprise commercially produced bismuth silver sheath tapes (Bi 2223/Ag) and ReBCO coating superconducting tapes. The Bi2223/Ag strip is mostly prepared by a powder sleeve method, is the earliest commercialized superconducting strip, but the price is difficult to reduce because the sleeve material is silver and silver alloy, and the critical current is seriously attenuated under a magnetic field. The ReBCO coating superconducting strip is mostly prepared by an ion-assisted deposition method, has higher critical temperature, critical current density and upper critical field, does not need heat treatment, has better mechanical property, but has the characteristic of anisotropy. The high-temperature superconducting magnet generally adopts a double-cake structure, and because the length and the current carrying capacity of a single strip material are limited, the application requirements of the high-temperature superconducting magnet with large size and multiple turns cannot be met, so that the ReBCO superconducting cable with high current carrying capacity, low alternating current loss, mechanical flexibility and other good superconducting performances is adopted to wind the solenoid type interpolation superconducting magnet, which is a development trend. The superconducting cable structure based on the application of the ReBCO coating superconducting strip high-field magnet at home and abroad mainly comprises a superconducting flat belt continuous transposition (Roebel) composite conductor, a superconducting Twisted Stack (TSTC) composite conductor and a spiral superconducting composite conductor (CORC).
ReBCO solenoid type of interposer magnets require the fabrication of terminal connections to the current leads. The joint terminal directly influences the current distribution condition among ReBCO strips in the solenoid type interpolation magnet, and the performance of the solenoid type interpolation magnet can be misjudged or the whole magnet can be damaged due to local quench of the ReBCO superconducting cable under the condition of uneven current distribution. In addition, the ReBCO solenoid type inserted magnet needs to be soaked by a refrigerator or liquid helium, so that the Joule heat generated by the resistance of a terminal of the magnet joint is reduced as much as possible, and the running stability of the magnet is improved.
The joint terminal manufacturing step of the ReBCO solenoid type inserted magnet generally winds the ReBCO superconducting cable into the solenoid type inserted magnet, and then the magnet joint terminal is manufactured. At present, the existing joint terminal manufacturing device is mainly suitable for a superconducting cable structure, and a solenoid type interpolation magnet has large volume and heavy mass, so that the convenient, quick and accurate low-resistance joint terminal manufacturing can not be carried out on the premise of ensuring the welding quality. Therefore, it is urgently needed to invent a simple and effective manufacturing device to solve the problem of convenient and high-quality manufacturing of the joint terminal of the ReBCO solenoid type inserted magnet
Disclosure of Invention
The present invention is directed to a device for manufacturing REBCO solenoid type inserted magnet terminal to solve the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a device for manufacturing REBCO solenoid type inserted magnet joint terminal comprises a supporting part and a heating part;
the heating part comprises an adjusting mechanism, and a heating pipe and a heating table which are arranged on the adjusting mechanism, the adjusting mechanism comprises a screw rod, and a heating pipe supporting table and a heating table supporting plate which are rotatably connected to the screw rod, the heating pipe supporting table and the heating table supporting plate are movably connected up and down on the screw rod, the heating pipe is positioned at the upper end of the heating pipe supporting table, and the heating table is positioned at the upper end of the heating table supporting plate;
the supporting part comprises a supporting frame and a supporting table, the supporting frame is used for supporting the joint terminal, the heating part is movably connected below the supporting frame, and the supporting table is movably arranged on one side of the heating part.
As a further scheme of the invention: the lead screw is a trapezoidal lead screw with the angle of 30 degrees, steps are arranged at two ends of the lead screw, a lead screw bearing supporting seat is rotatably connected to the steps at the lower end of the lead screw, an angular contact ball bearing connected with the lead screw is arranged on the lead screw bearing supporting seat, and a hand wheel is fixedly connected to the steps at the upper end of the lead screw.
As a further scheme of the invention: the screw rod is in threaded connection with two supporting nuts, and the two supporting nuts are fixedly connected with the heating pipe supporting table and the heating table supporting plate respectively.
As a further scheme of the invention: the heating table supporting plate is sleeved on the lead screw, an annular through groove is formed in one side of the heating table supporting plate, and a sliding groove is formed in one end, far away from the annular through groove, of the heating table supporting plate.
As a further scheme of the invention: the heating pipe supporting plate is sleeved on the screw rod, an annular groove is formed in the heating pipe supporting plate, and the annular groove is located below the annular through groove.
As a further scheme of the invention: the heating pipe is inserted in the annular through groove, the heating pipe is located at the upper end of the annular groove, the heating table is movably connected to the sliding groove, and the heating table is fixedly connected with the heating table supporting plate through a connecting bolt.
As a further scheme of the invention: be equipped with solder hole, first heater hole in the heating pipe, solder hole, first heater hole parallel arrangement, be equipped with first heating rod in the first heater hole.
As a further scheme of the invention: the heating table is internally provided with a heating groove and a second heating hole, the heating groove is arranged in parallel with the second heating hole, and a second heating rod is arranged in the second heating hole.
As a further scheme of the invention: the support frame upper end is equipped with the third through-hole, can dismantle in the third through-hole and be connected with magnet support flange, the support frame lower extreme is equipped with the universal wheel.
As a further scheme of the invention: the upper end of the supporting table is provided with a V-shaped positioning groove, and the included angle of the V-shaped positioning groove is 60-120 degrees.
Compared with the prior art, the invention has the beneficial effects that: the manufacturing device of the ReBCO solenoid type inserted magnet joint terminal provided by the embodiment of the invention has the advantages of simple structure, simplicity and convenience in operation, wide application range, high degree of freedom and high operability, can conveniently and quickly manufacture the joint terminal, improves the manufacturing quality of the joint terminal, and solves the problem of the critical performance decline of the solenoid type inserted magnet caused by mechanical damage in the manufacturing process.
Drawings
FIG. 1 is a schematic structural diagram of a solenoid-type internal-inserted magnet joint manufacturing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a manufacturing process of a solenoid-type interior-inserted magnet joint pretreatment according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a process for manufacturing a solenoid-type inserted magnet terminal according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a flange-type nut according to an embodiment of the present invention;
FIG. 5 is a schematic view of a 30 ° trapezoidal lead screw according to an embodiment of the present invention;
FIG. 6 is a schematic view of a heating table support plate according to an embodiment of the present invention;
FIG. 7 is a schematic view of a heating tube support plate according to an embodiment of the present invention;
FIG. 8 is a schematic view of a lead screw bearing mount provided in an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a heating tube according to an embodiment of the present invention;
fig. 10 is a cross-sectional view of a heating stage according to an embodiment of the present invention.
In the figure: 1-hand wheel, 2-lead screw, 201-step, 3-support nut, 301-threaded hole, 4-heating table support plate, 401-annular through groove, 402-sliding groove, 403-first through hole, 404-first connecting hole, 5-heating pipe support plate, 501-annular groove, 502-second through hole, 503-second connecting hole, 6-lead screw bearing base, 601-angular contact ball bearing, 7-heating pipe, 701-welding material hole, 702-first heating hole, 703-first heating rod, 8-heating table, 801-heating groove, 802-second heating hole, 803-second heating rod, 804-connecting bolt, 9-support frame, 901-third through hole, 902-universal wheel, 10-support table, 9-support table, 3-threaded hole, 3-heating table support plate, 3-annular groove, 3-heating table support plate, 3-welding groove, 7-angular contact ball bearing, 7-heating pipe, 701-welding material hole, 701-first heating rod, 8-heating table, 801-second heating groove, and 801-second heating groove, 11-magnet support flange, 12-solenoid type insert magnet, 1201-terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 10, in an embodiment of the present invention, an apparatus for manufacturing a REBCO solenoid type inserted magnet connector terminal includes a supporting portion and a heating portion.
The heating part comprises an adjusting mechanism, a heating pipe 7 and a heating platform 8, the heating pipe 7 and the heating platform 8 are arranged on the adjusting mechanism, the adjusting mechanism comprises a lead screw 2, a heating pipe supporting platform 5 and a heating platform supporting plate 8, the lead screw 2 is a 30-degree trapezoidal lead screw, the 30-degree trapezoidal lead screw is made of alloy tool steel materials, can bear axial heavy load and has self-locking characteristics, the diameter of the 30-degree trapezoidal lead screw is determined by the specification of a flange type nut, the length is lower than the height of a supporting frame 9, steps 201 are arranged at two ends of the lead screw 2, the step 201 at the lower end of the lead screw 2 is rotationally connected with a lead screw bearing supporting seat 6, an angular contact ball bearing 601 connected with the lead screw 2 is arranged on the lead screw bearing supporting seat 6, the step 201 at the upper end of the lead screw 2 is fixedly connected with a hand wheel 1, the hand wheel is made of plastic and is arranged at one end of the 30-degree trapezoidal lead screw for rotating the lead screw 2, and a lead screw bearing base is a wooden square plate, the thickness is greater than the bearing thickness, and angular contact ball bearing 601 is installed to the central point, and the specification is decided by 30 trapezoidal lead screw, is convenient for 30 trapezoidal lead screw spacing rotations.
The screw rod 2 is in threaded connection with two supporting nuts 3, the two supporting nuts 3 are respectively fixedly connected with a heating pipe supporting platform 5 and a heating table supporting plate 8, the heating pipe supporting platform 5 and the heating table supporting plate 8 are movably connected up and down on the screw rod 2, the heating pipe 7 is positioned at the upper end of the heating pipe supporting platform 5, the heating table 8 is positioned at the upper end of the heating table supporting plate 4, the heating table supporting plate 4 is sleeved on the screw rod 2,
an annular through groove 401 is formed at one side of a heating table supporting plate 4, a sliding groove 402 is formed in one end, far away from the annular through groove 401, of the heating table supporting plate 4, the heating pipe supporting plate 5 is sleeved on a screw rod 2, an annular groove 501 is formed in the heating pipe supporting plate 5, the annular groove 501 is located below the annular through groove 401, a heating pipe 7 is inserted into the annular through groove 401, the heating pipe 7 is located at the upper end of the annular groove 501, a heating table 8 is movably connected onto the sliding groove 402, the heating table 8 is fixedly connected with the heating table supporting plate 4 through a connecting bolt 804, a welding material hole 701 and a first heating hole 702 are formed in the heating pipe 7, the welding material hole 701 and the first heating hole 702 are arranged in parallel, a first heating rod 703 is arranged in the first heating hole 702, the heating pipe 7 is made of an aluminum alloy material, the diameter of the welding material hole 701 is larger than the diameter of a solenoid type inserted magnet connector, the depth is larger than the connector length, a heating groove 801 is formed in the heating table 8, A second heating hole 802, a heating groove 801 and the second heating hole 802 are arranged in parallel, a second heating rod 803 is arranged in the second heating hole 802, the heating table 8 is made of aluminum alloy material, the size of the heating groove 801 is determined by the terminal of the solenoid-type inserted magnet, the depth of the heating groove 801 is larger than the thickness of the terminal, the heating table support plate 4 is a wood square plate, the thickness is determined by the load, a first through hole 403 is processed in the center, an annular through groove 401 and a sliding groove 402 are respectively processed on two sides, the size of the through hole of the first through hole 403 is determined by the diameter of a 30-degree trapezoidal lead screw, 4 first connecting holes 404 are processed around the through hole, the first connecting holes correspond to the threaded holes 301 of the flange-type support nut 3 and are used for connecting the flange-type support nut 3, the size of the annular through groove 401 is determined by the diameter of the heating pipe 7, the size of the sliding groove 402 is determined by the size of a connecting bolt 804 of the heating table 8, the heating pipe support plate 5 is a wood square plate, the thickness is determined by the load, a second through hole 502 is machined in the center, an annular groove 501 is machined on one side, the size of the through hole is determined by the diameter of a 30-degree trapezoidal screw rod, 4 second connecting holes 503 are machined around the through hole, correspond to the threaded holes 301 of the flange type supporting nuts 3 and are used for connecting the flange type supporting nuts 3, and the size of the annular groove 501 is determined by the diameter of the heating pipe 7 and is used for positioning and mounting the heating pipe 7.
The supporting part is including the support frame 9 that is used for supporting the joint terminal, a supporting bench 10, heating portion swing joint is in support frame 9 below, a supporting bench 10 activity is arranged in heating portion one side, the support frame 9 lower extreme is equipped with universal wheel 902, a supporting bench 10 upper end is equipped with V type constant head tank, the contained angle of V type constant head tank is 60-120, a support frame 9 upper end is equipped with third through-hole 901, can dismantle in the third through-hole 901 and be connected with magnet supporting flange 11, magnet supporting flange 11 is the ring of stainless steel material, flange surface processing through-hole, bolted connection solenoid type interpolation magnet, magnet supporting flange external diameter is greater than the through-hole at magnet vertical support frame top, the internal diameter is decided by solenoid type interpolation magnet external diameter.
When the embodiment is used, the method comprises the following steps:
step 1, assembling an adjusting mechanism as shown in figure 1, installing one end of a 30-degree trapezoidal screw 2 on a screw bearing support seat 6, and then sequentially supporting a nut 3, a heating pipe support plate 5, a support nut 3, a heating table support plate 4 and a hand wheel 1 from bottom to top. The two supporting nuts 3 are rotated to adjust the distance between the heating pipe supporting plate 5 and the heating table supporting plate 4 to the length of the heating pipe, and then the supporting plates and the supporting nuts 3 are connected through bolts.
And 2, fixing the magnet support flange 11 on the solenoid type inserted magnet 12 by bolts, and inversely placing the magnet support flange on the support frame 9, namely inserting the magnet support flange 11 into the third through hole 901, as shown in fig. 2.
And 3, as shown in fig. 2, the heating pipe 7 is installed in the annular groove 501 of the heating pipe supporting plate 5 through the annular through groove 401 of the heating table supporting plate 4, the lifting mechanism is arranged below the magnet vertical supporting frame 9, and the positions of the lifting mechanism and the heating pipe 7 are adjusted according to the position of the magnet joint, so that the heating pipe 7 is positioned right below the joint.
And 4, starting the heating pipe 7, rotating the hand wheel 1 after the high-conductivity substance in the pipe is completely melted, lifting the heating pipe 7, burying the high-conductivity substance in the joint to be treated, reversely rotating the hand wheel 1 after the high-conductivity substance completely fills the joint, and quickly removing the heating pipe 7 to finish the pretreatment of the magnet joint.
And 6, rotating the hand wheel 1, lifting the heating table 8, placing the joint terminal 1201 of the solenoid type interpolation magnet 12 in the heating groove 801 of the heating table 8, manufacturing the joint terminal 1201, when the high-conductivity substance is completely filled in the joint terminal 1201 of the solenoid type interpolation magnet 12, reversely rotating the hand wheel 1, and quickly withdrawing from the heating table 8 to finish manufacturing the joint terminal 1201 of the solenoid type interpolation magnet.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A device for manufacturing REBCO solenoid type inserted magnet joint terminals is characterized by comprising a supporting part and a heating part;
the heating part comprises an adjusting mechanism, a heating pipe (7) and a heating table (8), the heating pipe (7) and the heating table (8) are arranged on the adjusting mechanism, the adjusting mechanism comprises a screw rod (2), and a heating pipe supporting table (5) and a heating table supporting plate (4) which are rotatably connected to the screw rod (2), the heating pipe supporting table (5) and the heating table supporting plate (4) are movably connected up and down on the screw rod (2), the heating pipe (7) is located at the upper end of the heating pipe supporting table (5), and the heating table (8) is located at the upper end of the heating table supporting plate (4);
the supporting part comprises a supporting frame (9) and a supporting table (10) which are used for supporting the joint terminal, the heating part is movably connected below the supporting frame (9), and the supporting table (10) is movably arranged on one side of the heating part.
2. The manufacturing device of the REBCO solenoid type internal-inserted magnet joint terminal according to claim 1, wherein the lead screw (2) is a 30 ° trapezoidal lead screw, steps (201) are provided at both ends of the lead screw (2), a lead screw bearing support base (6) is rotatably connected to the steps (201) at the lower end of the lead screw (2), an angular contact ball bearing (601) connected to the lead screw (2) is provided on the lead screw bearing support base (6), and a hand wheel (1) is fixedly connected to the steps (201) at the upper end of the lead screw (2).
3. The device for manufacturing the REBCO solenoid type inserted magnet connector terminal according to claim 1, wherein the lead screw (2) is threadedly connected with two support nuts (3), and the two support nuts (3) are respectively fixedly connected with the heating tube support table (5) and the heating table support plate (4).
4. The device for manufacturing the REBCO solenoid type inserted magnet connector terminal according to claim 1, wherein the heating table support plate (4) is sleeved on the lead screw (2), an annular through groove (401) is formed in one side of the heating table support plate (4), and a sliding groove (402) is formed in one end, far away from the annular through groove (401), of the heating table support plate (4).
5. The device for manufacturing the REBCO solenoid-type inserted magnet joint terminal according to claim 4, wherein the heating tube supporting platform (5) is sleeved on the screw rod (2), an annular groove (501) is formed in the heating tube supporting platform (5), and the annular groove (501) is located below the annular through groove (401).
6. The device for manufacturing the REBCO solenoid type inserted magnet joint terminal according to claim 5, wherein the heating tube (7) is inserted into the annular through groove (401), the heating tube (7) is located at the upper end of the annular groove (501), the heating table (8) is movably connected to the sliding groove (402), and the heating table (8) is fixedly connected with the heating table support plate (4) through a connecting bolt (804).
7. The device for manufacturing the REBCO solenoid type inserted magnet connector terminal according to claim 1, wherein a solder hole (701) and a first heating hole (702) are formed in the heating tube (7), the solder hole (701) and the first heating hole (702) are arranged in parallel, and a first heating rod (703) is formed in the first heating hole (702).
8. The apparatus for manufacturing REBCO solenoid type inserted magnet tab terminal as claimed in claim 1, wherein the heating stage (8) is provided with a heating groove (801) and a second heating hole (802), the heating groove (801) and the second heating hole (802) are arranged in parallel, and the second heating hole (802) is provided with a second heating rod (803).
9. The device for manufacturing the REBCO solenoid type inserted magnet joint terminal according to claim 1, wherein a third through hole (901) is formed in the upper end of the support frame (9), a magnet support flange (11) is detachably connected in the third through hole (901), and a universal wheel (902) is arranged at the lower end of the support frame (9).
10. The apparatus for manufacturing REBCO solenoid type inserted magnet connector terminal as claimed in claim 1, wherein the supporting platform (10) is provided with a V-shaped positioning groove at the upper end, the included angle of the V-shaped positioning groove is 60 ° -120 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011125235.5A CN112134120B (en) | 2020-10-20 | 2020-10-20 | Manufacturing device for REBCO solenoid type inserted magnet joint terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125235.5A CN112134120B (en) | 2020-10-20 | 2020-10-20 | Manufacturing device for REBCO solenoid type inserted magnet joint terminal |
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| CN112134120A CN112134120A (en) | 2020-12-25 |
| CN112134120B true CN112134120B (en) | 2021-09-17 |
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| CN113436809B (en) * | 2021-06-18 | 2022-08-02 | 中国科学院合肥物质科学研究院 | Bronze Nb method 3 Sn-Nb 3 Device for preparing resistance-free joint of Sn superconducting wire |
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| CN209544788U (en) * | 2019-04-15 | 2019-10-25 | 重庆渝至达科技有限公司 | The system being electrically connected for realizing capacitor foot with enameled wire |
| CN111313207A (en) * | 2020-02-21 | 2020-06-19 | 中国科学院合肥物质科学研究院 | Design and manufacturing method applied to ReBCO multi-strip superconducting cable joint terminal |
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2020
- 2020-10-20 CN CN202011125235.5A patent/CN112134120B/en active Active
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| EP0184184A2 (en) * | 1984-12-05 | 1986-06-11 | General Electric Company | Mold method for superconductive joint fabrication |
| US4713878A (en) * | 1984-12-05 | 1987-12-22 | General Electric Company | Mold method for superconductive joint fabrication |
| CN102738603A (en) * | 2011-04-02 | 2012-10-17 | 中国科学院高能物理研究所 | Preparation method of NbTi superconducting wire joint |
| CN102891419A (en) * | 2011-07-20 | 2013-01-23 | 展胜电业股份有限公司 | Automatic welding line manufacturing process |
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| CN209544788U (en) * | 2019-04-15 | 2019-10-25 | 重庆渝至达科技有限公司 | The system being electrically connected for realizing capacitor foot with enameled wire |
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