Welding tool and welding process for special-shaped wire outlet head locking structure of coil

Abstract

The invention is applicable to the technical field of welding tools, and provides a welding tool for a locking structure of a special-shaped wire outlet head of a coil, and the welding tool comprises a plurality of L-shaped brackets which are arranged on a winding machine and are used for supporting a movable bracket and a superconducting cable; the movable bracket is mounted on the L-shaped bracket; the fixing tool is installed on the movable support and used for positioning the Tension Link plate, the mechanical legs and the superconducting cable, and a cooling assembly is arranged on the fixing tool and used for cooling the superconducting cable. The invention further provides a welding process for the special-shaped wire outlet head locking structure of the coil, and the welding tool is adopted. The superconducting cable welding device has the advantages that cooling is rapid, a superconducting cable and a locking structure can be accurately positioned, the welding device is flexible and adjustable, and the superconducting cable welding device is suitable for coils of various sizes and various operation scenes, so that the operation efficiency is greatly improved, and the production cost is reduced; the welding process meets the temperature control requirement of the superconducting cable in the welding process, and the welding seam strength meets the mechanical property and other requirements of coil operation.

Description

Technical Field

[0001] The invention belongs to the technical field of welding tools, and in particular relates to a welding tool and a welding process for a locking structure of a special-shaped outlet head of a coil. Background Art

[0002] The back field magnet is a key component of the superconducting magnet system of the fusion reactor host key system comprehensive research facility. It is made of Nb3Sn material and operates at liquid helium temperature. The back field magnet consists of four sizes of coils. The inner and outer outlets of each coil are designed with a locking structure (composed of a Tension Link plate and a mechanical leg). The conductor outlet is a 3DR structure. The locking structure is a special-shaped part. The contour degree after welding is required to be ±1. During the welding process, the temperature of the superconducting cable does not exceed 200°C, and the welding process is completed online.

[0003] However, most existing welding tools use air cooling to control the conductor temperature, which cannot quickly cool down the high temperature generated by the conductor during welding. In addition, the welding device has no adjustment function and cannot meet the requirements of online welding. The welding process is only suitable for thick-walled conductors.

[0004] Therefore, it is necessary to improve the existing welding tooling and welding process, position the conductor and locking structure, and be able to adjust the spatial position online to meet the assembly and welding requirements, ensure that the temperature of the superconducting cable is lower than 200°C during the welding process, and meet the mechanical properties and other requirements. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a welding tool for a locking structure of a special-shaped outlet head of a coil, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The embodiment of the present invention is implemented as follows: a welding tool for a locking structure of a coil special-shaped outlet head, comprising:

[0007] There are several L-shaped brackets installed on the winding machine to support the movable bracket and the superconducting cable;

[0008] Movable bracket, installed on the L-shaped bracket;

[0009] The fixed tooling is installed on the movable bracket and is used to position the Tension Link board, the mechanical legs and the superconducting cable. The fixed tooling is provided with a cooling component for cooling the superconducting cable.

[0010] Preferably, the movable support comprises:

[0011] A bracket fixing plate, two of which are symmetrically provided, and a plurality of holes are provided on the bracket fixing plate, which are connected to the L-shaped bracket through the holes at different positions on the bracket fixing plate, so as to adjust the position in the Z-axis direction;

[0012] There are two groups of square tubes one, which are respectively connected to the two bracket fixing plates. The square tube two is sleeved between the two groups of square tubes one and fixed by fixing bolts for position adjustment in the X-axis direction;

[0013] The rotating arc plate is installed on the square tube 2, and the square tube 3 is movably installed in the rotating arc plate for rotating in the Z-axis direction;

[0014] Square tube four is sleeved with square tube three and is used for position adjustment in the Y-axis direction;

[0015] The self-rotating arc plate is installed on the square tube four, and the fixed tooling is installed on the self-rotating arc plate for rotating in the Z-axis direction.

[0016] Preferably, the rotating arc plate is provided with an arc-shaped slide groove, and the square tube is provided with a positioning block that cooperates with the arc-shaped slide groove, and the rotation in the Z-axis direction is achieved by sliding the positioning block in the arc-shaped slide groove.

[0017] Preferably, the fixing tool comprises:

[0018] A fixed plate, two sides of which are connected to the self-rotating arc plate;

[0019] The Tension Link plate, mechanical legs and superconducting cables are positioned and arranged on the fixed plate.

[0020] Preferably, the cooling assembly includes a cooling water pipe installed on the superconducting cable. The fixing plate is provided with a plurality of U-shaped supports for clamping the superconducting cable and the cooling water pipe, which are fixed by front adjusting bolts to drive the cooling water pipe to fit the surface of the superconducting cable and realize the front positioning of the superconducting cable relative to the Tension Link plate and the mechanical leg.

[0021] Preferably, the fixing plate is further provided with a boss, and one side of the boss is provided with a side adjustment bolt for lateral positioning of the superconducting cable.

[0022] Another object of the embodiment of the present invention is to provide a welding process for a locking structure of a special-shaped outlet head of a coil, using the above-mentioned welding tool, specifically comprising the following steps:

[0023] S1. Positioning the Tension Link plate, mechanical legs and superconducting cable using welding tooling, wherein the outer materials of the Tension Link plate, mechanical legs and superconducting cable are all 316LN stainless steel;

[0024] S2. Use argon arc welding, the welding wire is made of 316LN stainless steel, the first layer is used for base, the second layer is used for filling, and the third layer is used for covering. The welding is performed in a symmetrical manner, and the duration of each welding shall not exceed 5s;

[0025] S3. During the welding process, flowing water is injected into the water inlet of the cooling water pipe to cool the superconducting cable;

[0026] S4. After welding is completed, the welds are subjected to online X-ray inspection, pressure leak test and penetration test in sequence, and defective positions are repaired and re-welded after the serious problems are removed.

[0027] The embodiment of the present invention provides a welding tool for a locking structure of a special-shaped outlet head of a coil, which has the advantages of rapid cooling, accurate positioning of the superconducting cable and the locking structure, flexible and adjustable welding device, and suitability for coils of various sizes and various operating scenarios, thereby greatly improving operating efficiency and reducing production costs; the welding process meets the temperature control requirements of the superconducting cable during the welding process, and the weld strength meets the mechanical properties and other requirements of the coil operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the locking structure of the inner and outer wire ends of the back field magnetic coil;

[0029] Figure 2 A schematic diagram of the structure of a welding tool for locking a coil special-shaped outlet head provided by an embodiment of the present invention;

[0030] Figure 3 A schematic structural diagram of a movable bracket in a welding tool for a locking structure of a coil special-shaped outlet head provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the structure of a fixing tool and a welding part in a welding tool for a locking structure of a coil special-shaped outlet head provided by an embodiment of the present invention;

[0032] Figure 5 for Figure 4 A schematic diagram of a local enlarged structure;

[0033] Figure 6 A schematic diagram of a joint design for welding provided in an embodiment of the present invention;

[0034] Figure 7 A welding process requirement diagram provided by an embodiment of the present invention;

[0035] Figure 8 A welding process parameter diagram provided by an embodiment of the present invention;

[0036] Fig. 9 This is the welding temperature monitoring result provided by the embodiment of the present invention, wherein A, B, C, and D are four temperature measurement points.

[0037] In the attached figure: 1-square tube one; 2-bracket fixing plate; 3-rotating arc plate; 4-rotating arc plate; 5-square tube two; 6-fixing bolt; 7-Tension Link plate; 8-cooling water pipe; 9-U-shaped support; 10-fixing plate; 11-front adjustment bolt; 12-mechanical leg; 13-superconducting cable; 14-side adjustment bolt; 15-L-shaped bracket; 16-fixed tooling; 17-movable bracket; 18-winding machine; 19-square tube three; 20-square tube four. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The back field magnet is composed of coils of four sizes, as shown in Table 1. The inner and outer leads of each coil involve a locking structure, which includes a Tension Link plate and a mechanical leg. The conductor lead is a 3DR structure, such as Figure 1 As shown:

[0040] Table 1

[0041]

[0042]

[0043] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0044] like Figure 2 As shown, a structural diagram of a welding tool for a locking structure of a coil special-shaped outlet head provided by an embodiment of the present invention includes:

[0045] L-shaped brackets 15, provided in plurality, are mounted on the winding machine 18 and are used to support the movable bracket 17 and the superconducting cable 13;

[0046] A movable bracket 17 is mounted on the L-shaped bracket 15;

[0047] The fixed fixture 16 is installed on the movable bracket 17 and is used to position the Tension Link board, the mechanical leg 12 and the superconducting cable 13 . The fixed fixture 16 is provided with a cooling component for cooling the superconducting cable 13 .

[0048] In one embodiment of the present invention, the welding tooling for the locking structure of the coil special-shaped outlet head is provided with an L-shaped bracket 15 to address the problems raised in the prior art. The L-shaped bracket 15 is fixed on the winding machine 18 to support the superconducting cable 13 and the movable bracket 17. The movable bracket 17 supports the fixed tooling 16. The fixed tooling 16 positions the locking structure and the superconducting cable 13. The locking structure includes a Tension Link plate and a mechanical leg 12. The connection and cooperation of the L-shaped bracket 15, the movable bracket 17 and the fixed tooling 16 make the welding position flexible and adjustable. A cooling component is also provided to meet the requirement that the temperature of the superconducting cable 13 is lower than 200°C of the square tube 4 during the welding process.

[0049] like Figure 3 As shown, as a preferred embodiment of the present invention, the movable bracket 17 includes:

[0050] A bracket fixing plate, two of which are symmetrically provided, and a plurality of holes are provided on the bracket fixing plate, which are connected to the L-shaped bracket 15 through the holes at different positions on the bracket fixing plate, so as to adjust the position in the Z-axis direction;

[0051] There are two groups of square tubes one, which are respectively connected to the two bracket fixing plates. The square tube two is sleeved between the two groups of square tubes one and fixed by fixing bolts for position adjustment in the X-axis direction;

[0052] The rotating arc plate is mounted on the square tube 2, and the square tube 3 19 is movably mounted in the rotating arc plate for rotating in the Z-axis direction;

[0053] The square tube 4 20 is sleeved with the square tube 3 19 and is used for position adjustment in the Y-axis direction;

[0054] The self-rotating arc plate is mounted on the square tube 20, and the fixed tool 16 is mounted on the self-rotating arc plate for self-rotation in the Z-axis direction;

[0055] Specifically, the rotating arc plate is provided with an arc-shaped slide groove, and the square tube 3 19 is provided with a positioning block that cooperates with the arc-shaped slide groove, and the rotation in the Z-axis direction is realized by sliding the positioning block in the arc-shaped slide groove.

[0056] The fixing tool 16 is installed on the self-rotating arc plate, and the position of the fixing tool 16 can be adjusted by using the movable bracket 17. The two bracket fixing plates are respectively connected to the L-shaped brackets 15 on both sides. A plurality of holes are provided on the bracket fixing plates. When the bracket fixing plates are connected to the L-shaped brackets 15 by using different holes, the fixing tool 16 can be moved in the Z-axis direction. The square tube 1 can be a 30 square tube, and the square tube 2 can be a 25 square tube. Both the square tube 1 and the square tube 2 are formed tubes. The two are set together, and the free sliding and fixing of the square tube 2 can be achieved through the fixing holes on the square tube 2 and the waist groove on the square tube 1. , can adapt to coils of different sizes, and realize the movement of the fixed tooling 16 in the X-axis direction; the arc-shaped slide groove on the rotating arc plate can drive the rotation of the square tube three 19, and then the rotation of the fixed tooling 16 in the Z-axis direction can be realized; the square tube three 19 and the square tube four 20 are similar to the square tube one and the square tube two, and can slide and fix freely, so as to realize the movement of the fixed tooling 16 in the Y-axis direction; the self-rotation of the fixed tooling 16 in the Z-axis direction is realized by the self-rotating arc plate, and the free adjustment of the position of the fixed tooling 16 and the preliminary positioning of the position of the superconducting cable 13 coil 3DR can be realized by the movable bracket 17.

[0057] like Figures 4 to 5 As shown, as another preferred embodiment of the present invention, the fixing tool 16 includes:

[0058] A fixed plate 10, two sides of which are connected to the self-rotating arc plate;

[0059] Tension Link plate, mechanical legs 12 and superconducting cable 13 are positioned and arranged on the fixed plate 10;

[0060] Specifically, the cooling assembly includes a cooling water pipe installed on the superconducting cable 13. The fixing plate 10 is provided with a plurality of U-shaped supports for clamping the superconducting cable 13 and the cooling water pipe, and is fixed by a front adjustment bolt 11, which is used to drive the cooling water pipe to fit on the surface of the superconducting cable 13 and realize the front positioning of the superconducting cable 13 relative to the Tension Link plate and the mechanical leg 12;

[0061] Specifically, a boss is further provided on the fixing plate 10 , and a side adjustment bolt 14 is provided on one side of the boss for lateral positioning of the superconducting cable 13 .

[0062] Connect the fixed plate 10 to the rotating arc plate, pre-position the Tension Link plate and the mechanical leg 12, and then preliminarily position the superconducting cable 13, and then install the cooling water pipe. The cooling water pipe can be specifically made of copper pipe, which is provided with a water inlet and outlet. The superconducting cable 13 is quickly cooled down by flowing water and the excellent thermal conductivity of copper. The cooling water pipe and the front adjustment bolt 11 are arranged on the two wide sides of the superconducting cable 13. By adjusting the front adjustment bolt 11, the cooling water pipe is driven to fit closely to the surface of the superconducting cable 13, so as to enhance the thermal conductivity and realize the accurate positioning of the superconducting cable 13 relative to the Tension Link plate and the mechanical leg 12 on the front. The side positioning of the superconducting cable 13 can be realized by the preset fixing boss and the side adjustment bolt 14 on the fixed plate 10.

[0063] Another embodiment of the present invention provides a welding process for a locking structure of a special-shaped outlet head of a coil, using the above-mentioned welding tool, specifically comprising the following steps:

[0064] S1. Use welding tooling to position the Tension Link plate, mechanical leg 12 and superconducting cable 13. The interior of the superconducting cable 13 is made of Nb3Sn material, and the exterior is made of 316LN stainless steel armor. The Tension Link plate and mechanical leg 12 are made of the same 316LN stainless steel and are welded to the armor outside the superconducting cable. The joint design is as follows: Figure 6 As shown;

[0065] S2. Use argon arc welding, the welding wire is made of 316LN stainless steel, the first layer is used for base, the second layer is used for filling, and the third layer is used for covering. The welding is performed in a symmetrical manner. The duration of each welding shall not exceed 5s. The welding requirements and welding process parameters are as follows: Figure 7 , Figure 8 As shown:

[0066] S3, during the welding process, flowing water is injected into the water inlet of the cooling water pipe to cool the superconducting cable 13;

[0067] S4. After welding, the welds are tested online in turn by X-ray, pressure leak test and penetration test. The defective positions are repaired and the serious ones are removed and re-welded.

[0068] Temperature monitoring during welding, the results are as follows Fig. 9 As shown;

[0069] After welding is completed, testing is required. The testing standards and results are shown in Table 2:

[0070] Table 2

[0071]

[0072]

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding tool for locking the special-shaped outlet head of a coil, characterized in that: include: A plurality of L-shaped brackets (15) are provided and installed on the winding machine (18) for supporting the movable bracket (17) and the superconducting cable (13); A movable bracket (17) mounted on the L-shaped bracket (15); The fixed tool (16) is installed on the movable bracket (17) and is used to position the Tension Link plate (7), the mechanical leg (12) and the superconducting cable (13). The fixed tool (16) is provided with a cooling component for cooling the superconducting cable (13).

2. The welding tool for locking the coil special-shaped outlet head according to claim 1, characterized in that: The movable bracket (17) comprises: A bracket fixing plate (2), wherein two bracket fixing plates (2) are symmetrically provided, and a plurality of holes are provided on the bracket fixing plate (2), and are connected to the L-shaped bracket (15) via holes at different positions on the bracket fixing plate (2) for adjusting the position in the Z-axis direction; The square tubes (1) are provided in two groups, which are respectively connected to the two bracket fixing plates (2); the square tubes (5) are sleeved between the two groups of square tubes (1) and are connected and fixed by fixing bolts (6) for adjusting the position in the X-axis direction; The rotating arc plate (4) is mounted on the square tube 2 (5), and the square tube 3 (19) is movably mounted in the rotating arc plate (4) for rotating in the Z-axis direction; The square tube 4 (20) is sleeved with the square tube 3 (19) and is used for adjusting the position in the Y-axis direction; The self-rotating arc plate (3) is mounted on the square tube 4 (20), and the fixing tool (16) is mounted on the self-rotating arc plate (3) for self-rotation in the Z-axis direction.

3. The welding tool for locking the coil special-shaped outlet head according to claim 2, characterized in that: The rotating arc plate (4) is provided with an arc-shaped slide groove, and the square tube (19) is provided with a positioning block that cooperates with the arc-shaped slide groove, and the rotation in the Z-axis direction is achieved by sliding the positioning block in the arc-shaped slide groove.

4. The welding tool for locking the coil special-shaped outlet head according to claim 2, characterized in that: The fixing tool (16) comprises: A fixed plate (10), two sides of which are connected to the self-rotating arc plate (3); The tension link plate (7), the mechanical legs (12) and the superconducting cable (13) are positioned and arranged on the fixing plate (10).

5. The welding tool for locking structure of special-shaped coil outlets according to claim 4, characterized in that: The cooling assembly comprises a cooling water pipe (8) mounted on the superconducting cable (13); a plurality of U-shaped supports (9) are provided on the fixing plate (10) for clamping the superconducting cable (13) and the cooling water pipe (8); the fixing is performed by front adjustment bolts (11) for driving the cooling water pipe (8) to fit the surface of the superconducting cable (13) and realize the front positioning of the superconducting cable (13) relative to the Tension Link plate (7) and the mechanical leg (12).

6. The welding tool for locking the coil special-shaped outlet head according to claim 5, characterized in that: The fixing plate (10) is also provided with a boss, and one side of the boss is provided with a side adjustment bolt (14) for lateral positioning of the superconducting cable (13).

7. A welding process for a locking structure of a coil with a special-shaped outlet, characterized in that: The welding tool as claimed in any one of claims 1 to 6 is used, and specifically comprises the following steps: S1. Positioning the Tension Link plate (7), the mechanical leg (12) and the superconducting cable (13) using a welding tool, wherein the outer material of the Tension Link plate (7), the mechanical leg (12) and the superconducting cable (13) is 316LN stainless steel; S2. Use argon arc welding, the welding wire is made of 316LN stainless steel, the first layer is used for base, the second layer is used for filling, and the third layer is used for covering. The welding is performed in a symmetrical manner, and the duration of each welding shall not exceed 5s; S3, during the welding process, flowing water is injected into the water inlet of the cooling water pipe (8) to cool the superconducting cable (13); S4. After welding is completed, the welds are subjected to online X-ray inspection, pressure leak test and penetration test in sequence, and defective positions are repaired and re-welded after the serious problems are removed.

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