CN211248702U - Welding fixture for superconducting bare belt joint - Google Patents
Welding fixture for superconducting bare belt joint Download PDFInfo
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- CN211248702U CN211248702U CN201921921197.7U CN201921921197U CN211248702U CN 211248702 U CN211248702 U CN 211248702U CN 201921921197 U CN201921921197 U CN 201921921197U CN 211248702 U CN211248702 U CN 211248702U
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Abstract
The utility model discloses a welding fixture for superconducting bare belt joints, which comprises an upper clamping plate, a lower clamping plate and a pressure applying part, wherein the pressure applying part is provided with two groups of magnetic attraction elements with magnetic attraction, one group of the two groups of magnetic attraction elements is arranged on the upper clamping plate, and the other group of magnetic attraction elements is arranged on the lower clamping plate; the superconducting bare belt joint is positioned between the upper clamping plate and the lower clamping plate and welded, the upper clamping plate and the lower clamping plate attract under the action of magnetic attraction of the two groups of magnetic attraction elements, and force is applied to the superconducting bare belt joint so as to compress the superconducting bare belt joint. The utility model discloses a naked area of superconduction connects welding jig inhales upper clamp plate and lower plate with the help of the magnetic attraction of two sets of magnetism components to this application of force compresses tightly the naked area of superconduction joint that is located between upper clamp plate and the lower plate, and the naked area of superconduction joint atress is even with being heated, and it is very convenient to apply the packing force, satisfies the welding requirement of the naked area of superconduction joint, ensures that the naked area of superconduction does not have any damage in the welding process simultaneously.
Description
Technical Field
The invention belongs to the technical field of superconducting material welding, relates to a tool fixture for soft soldering of superconducting tapes, and particularly relates to a welding fixture for joints of superconducting bare tapes, which is suitable for welding second-generation high-temperature superconducting bare tapes, second-generation high-temperature superconducting finished tapes and Bi-series superconducting tapes.
Background
With the wide research and application of superconducting technology in many fields, the length requirement of superconducting tapes is high in the practical use of long-distance electric power transportation, superconducting application and the like, and the superconducting tapes are inevitably required to be connected due to the limitation of factors such as the superconducting tape preparation process. Many scholars and companies both at home and abroad have studied on the connection of superconducting tapes, especially the welding of the second generation high temperature superconducting tapes. The second generation high temperature superconductive bare belt is a layered structure of base belt/isolating layer/superconductive layer/silver layer, and the superconductive bare belt is packaged and coated by copper, stainless steel and other materials to form a finished belt. The thickness of the superconducting bare belt is only one third of that of the finished belt, the superconducting bare belt is welded and then packaged to form the superconducting finished belt, joints cannot be seen from the appearance of the belt, the surface quality of the belt is optimized, and the duty ratio and the coil size of the superconducting belt can be reduced by winding the coil with the belt with the joints. Due to the superiority of the preparation process, proper welding equipment and process are urgently needed to complete the connection of the superconducting bare belts.
At present, the welding method of the superconducting bare belt mainly comprises soldering, diffusion welding and unimpeded connection. Because the silver protective layer of the superconducting bare belt is thin (less than or equal to 3um) and the silver protective layer is close to the superconducting layer, the superconducting layer is easily damaged in different degrees due to mismatching of welding time, temperature and pressure. Therefore, equipment and parameters for welding the superconducting bare belt are more rigorous than those for welding a superconducting finished belt, and the requirements of a welding tool fixture are quite different. At present, the multi-side of the superconducting joint is heavier than a welding device and a process implementation method, the key point is a temperature control system, a pressure control system and the like of the welding device, and a clamp is generally integrated with welding equipment, so that the structure is complex and is not easy to control. The pressure of the clamp is realized by the dead weight of the clamp or the clamping of a bolt, the volume and the weight are large, the deformation of the strip is easily caused by improper operation of the strip fixing groove in the processing process, and the pressure applied to the strip is uneven and is not easy to control. For example, patent No. CN208099586U discloses a welding fixture for superconducting joints, which has long heating time and large pressure, and is only suitable for welding finished tapes and not suitable for welding bare superconducting tapes.
Disclosure of Invention
The invention provides a welding fixture for a superconducting bare belt joint, which is characterized in that an upper clamping plate and a lower clamping plate are attracted by means of magnetic attraction of two groups of magnetic attraction elements, so that a superconducting bare belt positioned between the upper clamping plate and the lower clamping plate is pressed tightly by applying force, the superconducting bare belt joint is uniformly stressed, the pressing force is very convenient to apply, and the welding requirement of the superconducting bare belt joint is met.
In order to solve the technical problem, the invention provides a welding fixture for a superconducting bare belt joint, which comprises an upper clamping plate, a lower clamping plate and a pressure applying component, wherein the pressure applying component is provided with two groups of magnetically attracted elements, one group of the two groups of magnetically attracted elements is arranged on the upper clamping plate, and the other group of magnetically attracted elements is arranged on the lower clamping plate; the superconducting bare belt is positioned between the upper clamping plate and the lower clamping plate and welded, the upper clamping plate and the lower clamping plate are attracted under the action of magnetic attraction of the two groups of magnetic attraction elements, and force is applied to the superconducting bare belt to compress the superconducting bare belt.
In a preferred embodiment of the present invention, the fixture further includes a limiting component, the limiting component is disposed between the upper clamping plate and the lower clamping plate, and has two sets of limiting pins sequentially disposed along a width direction of the fixture, and the bare superconducting tape is disposed between the two sets of limiting pins and extends along a length direction of the fixture.
In a preferred embodiment of the present invention, the upper clamping plate, the lower clamping plate and the limiting pin are made of graphite material or titanium alloy.
In a preferred embodiment of the present invention, the lower plate further comprises a limiting pin protruding from the lower surface of the upper plate, and the lower plate is provided with a limiting hole engaged with the limiting pin; or, the stop pin protrudes out of the upper surface of the lower plate, the upper plate is provided with a limit hole matched with the stop pin, and the stop pin and the limit hole are matched to ensure that the contact surface is well attached when the upper plate and the lower plate are attracted.
In a preferred embodiment of the present invention, the limiting member has at least three sets sequentially arranged along the extending direction of the length of the clamp, at least one of the limiting holes included in the three sets of limiting members is a long hole, and the long hole extends along the length direction of the clamp.
In a preferred embodiment of the present invention, the magnetic element is a magnetic powder.
In a preferred embodiment of the present invention, the magnetic attraction element is a magnet.
In a preferred embodiment of the present invention, the top surface of the upper clamping plate and the bottom surface of the lower clamping plate are both provided with blind holes, and the magnetic attraction element is disposed in the blind holes and fixed by high temperature resistant polymer material glue disposed in the hole opening of the blind holes.
In a preferred embodiment of the present invention, the upper splint or the lower splint further comprises a temperature measuring hole penetrating through the upper splint or the lower splint.
In a preferred embodiment of the present invention, the fixture further comprises a positioning component, the positioning component is arranged between the upper clamping plate and the lower clamping plate, and comprises a positioning pin and a positioning hole which are matched along the thickness direction of the fixture, the positioning pin is arranged on the lower surface of the upper clamping plate, and the positioning hole is arranged on the upper surface of the lower clamping plate; or the positioning pin is arranged on the upper surface of the lower clamping plate, and the positioning hole is arranged on the lower surface of the upper clamping plate.
In a preferred embodiment of the present invention, the jig further comprises an auxiliary member for assisting the assembling or disassembling of the jig, the auxiliary member including a notch portion provided at an edge of the upper plate or/and the lower plate.
In a preferred embodiment of the present invention, the limiting member further comprises pressing members disposed on both sides of the limiting member along the length direction of the clamp.
The invention has the beneficial effects that:
the welding fixture for the superconducting bare belt joint is characterized in that the upper clamping plate and the lower clamping plate are attracted by means of magnetic attraction of the two groups of magnetic attraction elements, so that the superconducting bare belt joint between the upper clamping plate and the lower clamping plate is pressed tightly by applying force, the superconducting bare belt joint is stressed and heated uniformly, pressing force is applied conveniently, welding requirements of the superconducting bare belt joint are met, and meanwhile, the superconducting bare belt is prevented from being damaged in the welding process.
Drawings
FIG. 1 is a schematic structural diagram of a welding fixture for a bare superconducting tape joint according to a preferred embodiment of the invention;
FIG. 2 is an exploded view of the welding fixture of FIG. 1;
fig. 3 is a bottom view of the upper jaw shown in fig. 1.
The reference numbers in the figures illustrate: 1-superconducting bare belt, 2-upper clamping plate, 4-lower clamping plate, 6-blind hole, 8-limiting pin, 10-limiting hole, 12-temperature measuring hole, 14-positioning column, 16-positioning hole and 18-gap part.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Examples
The embodiment discloses a welding fixture for a superconducting bare belt joint, which is used for welding a superconducting bare belt, and is shown in fig. 1-3, and comprises an upper clamp plate 2, a lower clamp plate 4 and a pressure applying part, wherein the pressure applying part is provided with two groups of magnetically attracted elements, one group of the two groups of magnetically attracted elements is arranged on the upper clamp plate 2, and the other group of magnetically attracted elements is arranged on the lower clamp plate 4; the superconductive bare belt is positioned between the upper clamp plate 2 and the lower clamp plate 4 and welded, the upper clamp plate 2 and the lower clamp plate 4 are attracted under the action of magnetic attraction of the two groups of magnetic attraction elements, and force is applied to the superconductive bare belt to compress the superconductive bare belt.
In the technical scheme of the embodiment, the magnetic attraction element is embedded and fixed in the upper clamp plate 2 and the lower clamp plate 4. As a preferred embodiment of the present application, the magnetic attraction element is magnetic powder, the top surface of the upper clamping plate 2 and the bottom surface of the lower clamping plate 4 are both provided with blind holes 6, and the magnetic powder is filled in the blind holes 6 and compacted and glued and fixed by a high temperature resistant polymer material arranged at the orifice of the blind holes 6.
As another preferred embodiment of the present application, the magnetic attraction element is a magnet, the top surface of the upper clamping plate 2 and the bottom surface of the lower clamping plate 4 are both provided with blind holes 6, and the magnet is filled in the blind holes 6 and is compacted and cemented and fixed by a high temperature resistant polymer material arranged at the orifice of the blind holes 6.
The pressure applied to the superconducting bare belt by the magnetic attraction element can be flexibly adjusted by adjusting the amount of magnetic powder filled in the blind holes 6 or adjusting the size and the number of the magnets. Compared with the magnetic block, the magnetic powder can more finely adjust the pressure applied to the superconducting bare belt.
Of course, the pressing members may be configured in a plurality of groups, for example, at least three groups, which are sequentially arranged along the length direction of the clamp, in consideration of the uniformity of the pressure applied by the pressing members on the length of the bare superconducting tape.
Above structural design's naked tape splice welding jig of superconduction, the magnetic attraction with the help of two sets of magnetism components is inhaled upper clamping plate 2 and lower clamping plate 4 to this application of force compresses tightly the naked tape of superconduction that thickness is less than 3um between upper clamping plate 2 and the lower clamping plate 4, and the naked tape splice of superconduction atress is with being heated evenly when welding, and it is very convenient to apply the packing force, satisfies the welding requirement of naked tape splice of superconduction. When the device is actually used, the clamp can be placed on (in) any heating equipment for heating, and the superconducting bare belt joint is ensured not to be damaged in the welding process.
Because the thickness of the superconducting bare tape is thin and the width of the superconducting bare tape is narrow, and the joint welding needs a certain length, (for example, in one case, the thickness of the superconducting bare tape is 65 μm and the width of the superconducting bare tape is 4mm, and the thickness of the joint during lap welding is about 170 μm; of course, in other practical cases, the thickness and the width of the superconducting bare tape can be adjusted, for example, the width of the superconducting bare tape is 12mm), the welding joint of the bare tape needs to be wrapped and packaged by materials such as copper, stainless steel and the like, and the final packaging quality can be affected by slight deviation of the alignment of the joint, in order to precisely align the superconducting bare tape, the clamp further comprises a limiting part, the limiting part is arranged between the upper clamping plate 2 and the lower clamping plate 4, the superconducting bare belt is arranged between the upper clamping plate 2 and the lower clamping plate 4 and is placed in an extending mode along the length direction of the clamp, and a joint of the superconducting bare belt is arranged between the two sets of limiting pins 8. In one embodiment of the present invention, the limit pin 8 protrudes from the lower surface of the upper plate 2, and the lower plate 4 is provided with a limit hole 10 engaged with the limit pin 8. In another implementation technical solution of this embodiment, the limit pin 8 protrudes out of the upper surface of the lower plate 4, and the upper plate 2 is provided with a limit hole 10 engaged with the limit pin 8. Above two kinds of implementation technical scheme can both realize that above-mentioned upper plate 2 and lower plate 4 contact surface between them when the actuation is smooth, and its roughness is not more than 1 permillage. Two sets of spacer pins 8 are along the width direction interval of anchor clamps and the width phase-match of the naked area of superconductive, and the phase-match of interval tolerance and width tolerance satisfies positive tolerance + 0.3.
The limiting pins 8 can be integrated with the lower clamping plate 4 or the upper clamping plate 2 or arranged in a split mode, the two groups of limiting pins 8 are evenly arranged on two sides of the superconducting bare belt joint, and the limiting pins 8 are matched with the limiting holes 10 in shape and can be circular, square or prismatic. In the technical scheme of the embodiment, the round shape is preferably used, so that the upper clamping plate 2 and the lower clamping plate 4 can be conveniently buckled together. On the other hand, at least one of the limiting holes 10 of the two groups of limiting parts is a long hole, and the long hole extends along the length direction of the clamp; the design of the strip hole can avoid the problem that the welding precision is influenced by the deformation of the clamp in the heating process.
In order to limit the superconducting bare belt with a certain length, the limiting component is provided with at least three groups which are sequentially arranged along the extension direction of the length of the clamp, and the two sides of the limiting component along the length direction of the clamp are both provided with a pressure applying component, so that the uniform stress of the joint of the superconducting bare belt is ensured.
The spacer pin 8 that constitutes the spacing part plays the limiting displacement to the naked tape joint of superconduction on the one hand, and on the other hand plays the alignment positioning effect when upper and lower splint lock, and under this positioning effect, the magnetic attraction that the component was applyed is inhaled to the magnetism can be effectively used in the naked area of superconduction.
In order to ensure accurate alignment when the upper and lower chucks are assembled, the jig further comprises a positioning member, which is provided between the upper clamping plate 2 and the lower clamping plate 4 and comprises a positioning pin 14 and a positioning hole 16 that are matched along the thickness direction of the jig. In one of the technical solutions of the present embodiment, the positioning pin 14 is disposed on the lower surface of the upper clamping plate 2, and the positioning hole 16 is disposed on the upper surface of the lower clamping plate 4; in another technical solution of this embodiment, the positioning pin 14 is disposed on the upper surface of the lower clamp plate 4, and the positioning hole 16 is disposed on the lower surface of the upper clamp plate 2. Under the accurate counterpoint of locating part, further improve the effective magnetic attraction of component effect on the naked area of superconductive.
The upper clamping plate 2 or the lower clamping plate 4 is provided with a through temperature measuring hole 12, the upper clamping plate and the lower clamping plate are respectively subjected to temperature measurement through the temperature measuring hole 12, and the position of the temperature measuring hole can be automatically set according to actual conditions.
In order to facilitate the assembly and disassembly of the jig, the jig further includes an auxiliary member including a notch portion 18 provided at the edge of the upper plate 2 or/and the lower plate 4.
As a further improvement of the present invention, the upper plate 2, the lower plate 4, the stopper member and the positioning member are made of graphite. Graphite is produced by grinding coke as raw material into powder, extruding or compression molding, baking, graphitizing, and processing into various shapes. The graphite has a lower coefficient of thermal expansion than the ceramic, and is not easily deformed during heating. Meanwhile, the graphite has the characteristics of good thermal conductivity and no tin adhesion.
In addition, other materials which are resistant to high temperature and do not deform at high temperature can be used for the upper clamping plate 2, the lower clamping plate 4, the limiting component and the positioning component, such as titanium alloy.
The clamp with the structure has the following technical advantages: the heat conductivity is good, the solder is not adhered to, the fixture is not easy to deform in the welding process, the force uniformity applied to the joint of the bare strip is good, the centering performance of the strip is good, and the requirements of short welding time, uniform applied pressure, and convenience in lofting and sampling of the superconducting bare strip are met.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a naked tape joint welding jig of superconduction which characterized in that: the magnetic attraction type magnetic iron clamp comprises an upper clamp plate, a lower clamp plate and a pressing component, wherein the pressing component is provided with two groups of magnetic attraction elements which are magnetically attracted, one group of the two groups of magnetic attraction elements is arranged on the upper clamp plate, and the other group of magnetic attraction elements is arranged on the lower clamp plate; the superconducting bare belt is positioned between the upper clamping plate and the lower clamping plate and welded, the upper clamping plate and the lower clamping plate are attracted under the action of magnetic attraction of the two groups of magnetic attraction elements, and force is applied to the superconducting bare belt to compress the superconducting bare belt.
2. The bare superconducting tape joint welding fixture of claim 1, wherein: the fixture further comprises a limiting component, the limiting component is arranged between the upper clamping plate and the lower clamping plate, the limiting component is provided with two sets of limiting pins which are sequentially arranged along the width direction of the fixture, and the superconducting bare belt is located between the two sets of limiting pins and is placed in an extending mode along the length direction of the fixture.
3. The bare superconducting tape joint welding fixture of claim 2, wherein: the upper clamping plate, the lower clamping plate and the limiting pin are all made of graphite materials or titanium alloy.
4. The bare superconducting tape joint welding fixture of claim 2, wherein: the limiting pin is arranged to protrude out of the lower surface of the upper clamping plate, and a limiting hole matched with the limiting pin is formed in the lower clamping plate; or, the stop pin protrudes out of the upper surface of the lower plate, a limit hole matched with the stop pin is formed in the upper plate, and the stop pin and the limit hole are matched to enable the contact surface to be smooth when the upper plate and the lower plate are attracted.
5. The bare superconducting tape joint welding fixture of claim 4, wherein: the limiting parts are provided with at least three groups which are sequentially arranged along the length extending direction of the clamp, at least one limiting hole in the limiting holes of the three groups of limiting parts is a strip hole, and the strip hole extends along the length direction of the clamp.
6. The bare superconducting tape joint welding fixture of claim 1, wherein: the magnetic attraction element is magnetic powder.
7. The bare superconducting tape joint welding fixture of claim 1, wherein: the magnetic attraction element is a magnet.
8. The bare superconducting tape joint welding jig of claim 6 or 7, wherein: the top surface of the upper clamping plate and the bottom surface of the lower clamping plate are both provided with blind holes, and the magnetic attraction element is arranged in the blind holes and is compacted and fixed through a rubber cover arranged at a hole opening of the blind holes.
9. The bare superconducting tape joint welding fixture of claim 1, wherein: the clamp further comprises a positioning component, the positioning component is arranged between the upper clamping plate and the lower clamping plate and comprises a positioning pin and a positioning hole, the positioning pin and the positioning hole are matched along the thickness direction of the clamp, the positioning pin is arranged on the lower surface of the upper clamping plate, and the positioning hole is arranged on the upper surface of the lower clamping plate; or the positioning pin is arranged on the upper surface of the lower clamping plate, and the positioning hole is arranged on the lower surface of the upper clamping plate.
10. The bare superconducting tape joint welding fixture of claim 1, wherein: the jig further includes an auxiliary member for assisting the assembling or disassembling of the jig, which includes a notch portion provided at an edge of the upper plate or/and the lower plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921921197.7U CN211248702U (en) | 2019-11-08 | 2019-11-08 | Welding fixture for superconducting bare belt joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921921197.7U CN211248702U (en) | 2019-11-08 | 2019-11-08 | Welding fixture for superconducting bare belt joint |
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| CN211248702U true CN211248702U (en) | 2020-08-14 |
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| CN201921921197.7U Active CN211248702U (en) | 2019-11-08 | 2019-11-08 | Welding fixture for superconducting bare belt joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695487A (en) * | 2019-11-08 | 2020-01-17 | 苏州新材料研究所有限公司 | Welding fixture for superconducting bare belt joint |
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2019
- 2019-11-08 CN CN201921921197.7U patent/CN211248702U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695487A (en) * | 2019-11-08 | 2020-01-17 | 苏州新材料研究所有限公司 | Welding fixture for superconducting bare belt joint |
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