Cable connector manufacturing tool

Abstract

The utility model discloses a cable joint manufacturing tool, and belongs to the technical field of superconducting magnets. The cable connector manufacturing tool comprises a fixing assembly which comprises a fixing clamp with a clamping space; the copper piece is provided with a first limiting groove and a second limiting groove in a concave mode, the first limiting groove is used for containing a first cable, the second limiting groove is used for containing a second cable, and the copper piece, the second cable and the first cable are sequentially attached through the fixing clamp; and the fixing assembly is arranged on the heating module and is used for welding the first cable and the second cable. According to the utility model, the Ni3Sn superconducting wire and the Niobium-TiRutherford cable can be welded, and the good ductility of the Niobium-TiRutherford cable is utilized, so that the wound magnet can be smoothly routed at the wire inlet and outlet joint.

Description

Technical Field

[0001] The utility model relates to the technical field of superconducting magnets, in particular to a cable joint manufacturing tool. Background Art

[0002] Niobium tin (Nb3Sn) is an important superconducting material, mainly used in magnets with a field strength of 10T-25T. The critical current density carried under a magnetic field of 4.2K / 12T is about 650A / mm2. However, Nb3Sn material is relatively brittle. When the strain exceeds 0.5%, its critical current density decreases by 50%. At the inlet and outlet joints of magnets wound with Nb3Sn superconducting wires, the Nb3Sn superconducting wires are not tough enough and are prone to strain exceeding 0.3%, resulting in a significant decrease in current carrying capacity. There is also a problem of complex routing paths, and the inlet and outlet joints cannot be routed smoothly.

[0003] Therefore, it is urgent to provide a cable connector manufacturing tool to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a cable joint manufacturing tool, which can weld the niobium-tin superconducting wire with the niobium-titanium Rutherford cable, and utilize the good ductility of the niobium-titanium Rutherford cable to make the wound magnets run smoothly at the inlet and outlet joints.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] Cable connector production tooling, including:

[0007] A fixing assembly including a fixing clamp having a clamping space;

[0008] A copper piece, wherein a first limiting groove and a second limiting groove are concavely formed on the copper piece, wherein the first limiting groove is used to accommodate a first cable, and the second limiting groove is used to accommodate a second cable, and the copper piece, the second cable and the first cable are sequentially fitted together along a first direction in the clamping space through the fixing clamp;

[0009] A heating module, wherein the fixing assembly is disposed on the heating module along a second direction and is used for welding the first cable and the second cable.

[0010] As an optional solution for tooling for making cable connectors, the first end face of the copper part is recessed with the first limiting groove, the bottom of the first limiting groove is recessed with the second limiting groove, the first direction is perpendicular to the second direction, and / or the second end face of the copper part is recessed with a third limiting groove.

[0011] As an optional solution for the cable connector manufacturing tooling, the fixing clamp includes a first connecting arm and a second connecting arm and a third connecting arm respectively arranged at opposite ends of the first connecting arm, the second connecting arm is provided with a threaded hole extending along the first direction, and the fixing assembly further includes:

[0012] An elastic pressing unit, wherein the elastic pressing unit is arranged on the third connecting arm;

[0013] An adjusting bolt having a first stop end is threadedly connected to the second connecting arm, and the clamping space is formed between the first stop end and the elastic pressing unit.

[0014] As an optional solution for the cable connector manufacturing tooling, the third connecting arm is provided with a guide through hole extending along the first direction, and the elastic pressing unit includes:

[0015] A guide post having a second stop end, one end of which is slidably disposed in the guide through hole;

[0016] An elastic member is sleeved on the guide column, one end of the elastic member abuts against the second stop end, and the other end of the elastic member abuts against the third connecting arm.

[0017] As an optional solution for the cable joint manufacturing tooling, the elastic pressing unit further includes:

[0018] A stop nut is threadedly connected to an end of the guide column away from the second stop end.

[0019] As an optional solution of the cable joint production tool, the cable joint production tool also includes:

[0020] A first cushion block, wherein the cross-sectional area of ​​the first cushion block is greater than the cross-sectional area of ​​the first stop end, and the first cushion block clip is disposed between the first stop end and the copper piece.

[0021] As an optional solution of the cable joint production tool, the cable joint production tool also includes:

[0022] A second cushion block, wherein the cross-sectional area of ​​the second cushion block is larger than the cross-sectional area of ​​the second stop end, and the second cushion block clip is arranged between the second stop end and the copper piece.

[0023] As an optional solution for the cable joint manufacturing tooling, the copper piece is in a straight line, arc or wave shape.

[0024] As an optional solution for the cable joint manufacturing tooling, the heating module includes a heating platform and a plurality of heating rods. The heating platform is arranged in the shape of the copper piece, and the plurality of heating rods are embedded in the heating platform.

[0025] As an optional solution for the cable joint manufacturing tool, the first cable includes a Rutherford cable, and the second cable includes a niobium-tin superconducting wire.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The cable joint manufacturing tooling provided by the utility model is provided with a first limiting groove for placing a first cable and a second limiting groove for placing a second cable on the copper part, and a fixing clamp with a clamping space is used to make the copper part, the second cable and the first cable fit and be clamped in sequence, thereby improving the welding stability. A solder wire or a solder layer is provided between the fitting surfaces of the copper part and the second cable, and a solder wire or a solder layer is provided between the fitting surfaces of the second cable and the first cable, and then the fixing assembly with the copper part, the second cable and the first cable is placed on the heating module, and the second cable and the first cable are welded together by heating welding after applying flux, thereby ensuring the welding firmness. Wherein, when the second cable is a niobium-tin superconducting wire and the first cable is a Rutherford cable, since the Rutherford cable is welded at the inlet and outlet joints of the niobium-tin superconducting wire, the good ductility of the Rutherford cable is utilized to enable the wound magnet to be smoothly routed at the inlet and outlet joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of assembling the cable joint manufacturing tool and the first cable and the second cable in the embodiment of the utility model;

[0030] Figure 2 An exploded schematic diagram of a cable joint manufacturing tool and a first cable and a second cable in an embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the copper part in the embodiment of the utility model;

[0032] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0033] Figure 5 This is a schematic diagram of the structure after the copper part, the second cable and the first cable are welded in the embodiment of the utility model;

[0034] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0035] Figure 7 It is a schematic diagram of the assembly of the fixing components in the embodiment of the utility model;

[0036] Figure 8 It is an exploded schematic diagram of the fixing assembly in the embodiment of the utility model.

[0037] Reference numerals:

[0038] 100. a first cable; 200. a second cable;

[0039] 1. Fixing assembly; 2. Copper piece; 3. Heating module; 31. Heating platform; 32. Heating rod; 4. First pad; 5. Second pad;

[0040] 11. fixing clip; 111. first connecting arm; 112. second connecting arm; 1121. threaded hole; 113. third connecting arm; 1131. guide through hole; 12. adjusting bolt; 121. first stop end; 13. guide column; 131. second stop end; 14. elastic member; 15. stop nut;

[0041] 21. First end face; 22. Second end face; 23. First limiting groove; 24. Second limiting groove. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] Niobium tin (Nb3Sn) is an important superconducting material, mainly used in magnets with a field strength of 10T-25T. The critical current density carried by it under a magnetic field of 4.2K / 12T is about 650A / mm 2 .

[0047] Niobium titanium wire (NbTi) is also a commonly used low-temperature superconducting material with high strength, ductility, high critical current density and relatively low cost. The Rutherford cable made of niobium titanium is a flat cable made of several superconducting round wires through an unconventional cable twisting process. It has the advantages of strong current carrying capacity, good mechanical strength, compact winding structure, and low coil circulation loss. The critical current density carried under a 4.2K / 5T magnetic field is about 750A / mm 2 The field strength at the inlet and outlet joints of the magnet wound with niobium-tin superconducting wire is not high, and the welded niobium-titanium Rutherford cable can be smoothly routed by taking advantage of the high ductility of the niobium-titanium Rutherford cable.

[0048] In order to weld the niobium-tin superconducting wire to the Rutherford cable, and to utilize the good superconductivity and ductility of the Rutherford cable to improve the field strength and critical current density of the magnet at the inlet and outlet joints of the wound magnet, this embodiment provides a cable joint manufacturing tool, which is combined with the following Figures 1 to 8 The specific contents of this embodiment are described in detail. It should be noted that the first direction mentioned in this embodiment is Figure 8 The X direction in .

[0049] like Figures 1 to 6As shown, the cable joint manufacturing tooling in this embodiment includes a fixing component 1, a copper part 2 and a heating module 3. Among them, the fixing component 1 includes a fixing clamp 11 with a clamping space. The copper part 2 is recessed with a first limiting groove 23 and a second limiting groove 24, the first limiting groove 23 is used to accommodate the first cable 100, and the second limiting groove 24 is used to accommodate the second cable 200. The copper part 2, the second cable 200 and the first cable 100 are sequentially attached through the fixing clamp 11. The fixing component 1 is set on the heating module 3 for heating and welding the first cable 100 and the second cable 200. Exemplarily, the first cable 100 includes a niobium-titanium Rutherford cable, and the second cable 200 includes a niobium-tin superconducting wire.

[0050] In short, the cable joint manufacturing tooling provided in this embodiment is provided with a first limiting groove 23 for placing the first cable 100 and a second limiting groove 24 for placing the second cable 200 on the copper part 2, and a fixing clamp 11 with a clamping space is used to make the copper part 2, the second cable 200 and the first cable 100 fit and be clamped in sequence, thereby improving the welding stability. A solder wire or a solder layer is provided between the fitting surfaces of the copper part 2 and the second cable 200, and a solder wire or a solder layer is provided between the fitting surfaces of the second cable 200 and the first cable 100, and then the fixing assembly 1 with the copper part 2, the second cable 200 and the first cable 100 is placed on the heating module 3, and the second cable 200 and the first cable 100 are welded together by heating and welding after applying flux, thereby ensuring the welding firmness. When the second cable 200 is a niobium-tin superconducting wire and the first cable 100 is a niobium-titanium Rutherford cable, the niobium-titanium Rutherford cable is welded at the inlet and outlet joints of the niobium-tin superconducting wire, and the good ductility of the niobium-titanium Rutherford cable is utilized to allow the wound magnet to be smoothly routed at the inlet and outlet joints.

[0051] Furthermore, in this embodiment, a first limiting groove 23 is recessed on the first end face 21 of the copper part 2, a second limiting groove 24 is recessed at the bottom of the first limiting groove 23, and the second limiting groove 24 located on the first end face 21 is connected to the first limiting groove 23 up and down, so that a Rutherford cable is welded on a niobium-tin superconducting wire.

[0052] In other application scenarios, a third limiting groove may be provided on the second end surface 22 of the copper member 2, so that two Rutherford cables can be welded on one niobium-tin superconducting wire. It is understandable that in other embodiments, three, four, or five Rutherford cables may be welded on one niobium-tin superconducting wire, and no excessive restrictions are imposed here.

[0053] For example, Figure 7 Combination Figure 8As shown, the fixing clamp 11 includes a first connecting arm 111 and a second connecting arm 112 and a third connecting arm 113 respectively arranged at opposite ends of the first connecting arm 111, the second connecting arm 112 is provided with a threaded hole 1121 extending along the first direction, and the fixing assembly 1 also includes an elastic pressing unit and an adjusting bolt 12 having a first stop end 121, and the elastic pressing unit is arranged on the third connecting arm 113. The adjusting bolt 12 is threadedly connected to the second connecting arm 112, and a clamping space is formed between the first stop end 121 and the elastic pressing unit. Since the adjusting bolt 12 and the elastic pressing unit are arranged at opposite ends of the fixing clamp 11, the clamping space can be reduced by screwing the adjusting bolt 12, thereby increasing the clamping force on the copper part 2, the second cable 200 and the first cable 100, ensuring a good fit, and helping to improve the welding effect.

[0054] Further, the third connecting arm 113 is provided with a guide through hole 1131 extending along the first direction, and the elastic pressing unit includes an elastic member 14 and a guide column 13 having a second stop end 131, and one end of the guide column 13 is slidably inserted into the guide through hole 1131. The elastic member 14 is sleeved on the guide column 13, and one end of the elastic member 14 abuts against the second stop end 131, and the other end of the elastic member 14 abuts against the third connecting arm 113. Optionally, the elastic member 14 is a spring, and the guide column 13 can automatically expand and contract relative to the guide through hole 1131 under the action of the elastic member 14. In the process of heating and welding, as the temperature rises and the solder melts, the tightening space will be reduced under the action of the elastic member 14.

[0055] The total thickness of the first cable 100 and the second cable 200 is reduced, and the guide post 13 can always be in contact with the first cable 100 under the action of the elastic member 14, so as to ensure that the solder thickness in the middle of the joint is small and reduce the resistance.

[0056] Furthermore, the elastic pressing unit further includes a stop nut 15, which is threadedly connected to an end of the guide column 13 away from the second stop end 131. On the one hand, the compression amount of the elastic member 14 can be adjusted by screwing the stop thread, and on the other hand, the stop nut 15 abuts against the third connecting arm 113 to prevent the guide column 13 from popping out of the wire through hole under the action of the elastic member 14.

[0057] Optionally, the cable connector manufacturing tool further includes a first pad 4, the cross-sectional area of ​​the first pad 4 is greater than the cross-sectional area of ​​the first stop end 121, and the first pad 4 is sandwiched between the first stop end 121 and the copper member 2. By adding the first pad 4, the contact area between the first pad 4 and the copper member 2 can be increased to ensure uniform force on the second end face 22 of the copper member 2. In actual use, the number of first pads 4 and second pads 5 is added according to the length of the copper member 2, and no excessive restrictions are made here.

[0058] Optionally, the cable joint manufacturing tool further includes a second cushion block 5, the cross-sectional area of ​​the second cushion block 5 is larger than the cross-sectional area of ​​the second stop end 131, and the second cushion block 5 is sandwiched between the second stop end 131 and the copper member 2. By adding the second cushion block 5, the contact area between the second cushion block 5 and the copper member 2 and the first cable 100 can be increased, ensuring uniform force on the first end face 21 of the copper member 2.

[0059] Exemplarily, the shape of the copper piece 2 is designed according to the required bending shape of the niobium-tin superconducting wire. The copper piece 2 may be in a straight line, an arc or a wave shape, etc., but is not limited to the straight line, the arc or the wave shape.

[0060] The heating module 3 includes a heating platform 31 and a plurality of heating rods 32. The heating platform 31 is arranged in accordance with the copper part 2, and the plurality of heating rods 32 are embedded in the heating platform 31. By adding a plurality of heating rods 32 in the heating platform 31, the heating platform 31 is ensured to heat the cable uniformly.

[0061] Exemplarily, the first pad 4 and the second pad 5 are made of metal aluminum or stainless steel, which is convenient for rapid heat transfer. The heating platform 31 is made of stainless steel or aluminum to avoid corrosion and extend service life.

[0062] In this embodiment, a cable joint manufacturing tool is used to weld the niobium-titanium Rutherford cable joint on the niobium-tin superconducting wire. The operation is simple and the time is short. The niobium-titanium wire has good ductility and solves the problem of complex Nb3Sn routing. The resistance is less than 1X10 -8 ohm.

[0063] The steps for using the cable joint production tooling in this embodiment are as follows: 1. Install the heating rod 32 on the heating platform 31; 2. Install the first cushion block 4, the copper part 2, the solder wire, the second cable 200 (which can be a niobium-tin superconducting wire), the solder wire, the first cable 100 (which can be a Rutherford cable), and the second cushion block 5 in sequence, fix them with the fixing clip 11, place them on the heating platform 31, and brush the side surfaces of the second cable 200 and the first cable 100 with flux; 3. Heat according to the heating curve.

[0064] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A cable connector manufacturing tool, characterized in that: include: A fixing assembly (1) comprising a fixing clamp (11) having a clamping space; A copper component (2), wherein a first limiting groove (23) and a second limiting groove (24) are recessedly provided on the copper component (2), wherein the first limiting groove (23) is used to accommodate a first cable (100), and the second limiting groove (24) is used to accommodate a second cable (200), and the copper component (2), the second cable (200) and the first cable (100) are sequentially fitted in a first direction in the clamping space through the fixing clamp (11); A heating module (3), wherein the fixing assembly (1) is arranged on the heating module (3) along a second direction and is used for welding the first cable (100) and the second cable (200).

2. The cable joint manufacturing tool according to claim 1, characterized in that: The first end surface (21) of the copper part (2) is recessed with the first limiting groove (23), the bottom of the first limiting groove (23) is recessed with the second limiting groove (24), the first direction and the second direction are perpendicular to each other, and / or the second end surface (22) of the copper part (2) is recessed with a third limiting groove.

3. The cable joint manufacturing tool according to claim 1, characterized in that: The fixing clamp (11) comprises a first connecting arm (111) and a second connecting arm (112) and a third connecting arm (113) respectively arranged at opposite ends of the first connecting arm (111), the second connecting arm (112) being provided with a threaded hole (1121) extending along a first direction, and the fixing assembly (1) further comprises: An elastic pressing unit, the elastic pressing unit being arranged on the third connecting arm (113); An adjusting bolt (12) having a first stop end (121), the adjusting bolt (12) being threadedly connected to the second connecting arm (112), and the clamping space being formed between the first stop end (121) and the elastic pressing unit.

4. The cable joint manufacturing tool according to claim 3, characterized in that: The third connecting arm (113) is provided with a guide through hole (1131) extending along the first direction, and the elastic pressing unit comprises: A guide post (13) having a second stop end (131), one end of the guide post (13) being slidably disposed in the guide through hole (1131); An elastic member (14), wherein the elastic member (14) is sleeved on the guide column (13), and one end of the elastic member (14) abuts against the second stop end (131), and the other end of the elastic member (14) abuts against the third connecting arm (113).

5. The cable joint manufacturing tool according to claim 4, characterized in that: The elastic pressing unit further comprises: A stop nut (15), the stop nut (15) being threadedly connected to an end of the guide column (13) away from the second stop end (131).

6. The cable joint manufacturing tool according to claim 4, characterized in that: The cable joint manufacturing tool also includes: A first cushion block (4), wherein the cross-sectional area of ​​the first cushion block (4) is greater than the cross-sectional area of ​​the first stop end (121), and the first cushion block (4) is sandwiched between the first stop end (121) and the copper part (2).

7. The cable joint manufacturing tool according to claim 4, characterized in that: The cable joint manufacturing tool also includes: A second cushion block (5), wherein the cross-sectional area of ​​the second cushion block (5) is greater than the cross-sectional area of ​​the second stop end (131), and the second cushion block (5) is sandwiched between the second stop end (131) and the copper part (2).

8. The cable joint manufacturing tool according to claim 1, characterized in that: The copper piece (2) is in a straight line, arc or wave shape.

9. The cable joint manufacturing tool according to claim 8, characterized in that: The heating module (3) comprises a heating platform (31) and a plurality of heating rods (32); the heating platform (31) is arranged in a conformal manner with the copper piece (2); and the plurality of heating rods (32) are embedded in the heating platform (31).

10. The cable joint manufacturing tool according to any one of claims 1 to 9, characterized in that: The first cable (100) comprises a Rutherford cable, and the second cable (200) comprises a niobium-tin superconducting wire.

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