Helium tank welding tool clamp and helium tank welding method

Abstract

The invention discloses a helium tank welding tool clamp and a helium tank welding method. The helium tank welding tool clamp comprises a base, a connecting shaft, a first supporting disc, a second supporting disc, a first supporting rod and a second supporting rod. A clamping groove is formed in the base, and a limiting hole is formed in the bottom of the clamping groove; one end of the connecting shaft is connected to a limiting hole in the base; the first supporting disc is fixedly arranged on the connecting shaft in a sleeving manner, and the outer wall of the first supporting disc can support the inner wall of the helium tank part A; the second supporting disc is fixedly arranged on the side, opposite to the first supporting disc, of the connecting shaft in a sleeving mode, the second supporting disc and the first supporting disc are concentrically arranged, and the outer wall of the second supporting disc can support the inner wall of the helium tank part D. Welding with different requirements is achieved through different combination modes of tools, scribing, marking and the like are not needed before welding, welding is carried out after installation according to the assembly relation, the working procedures and steps are reduced, the working efficiency is improved, and the tool is simple, convenient and easy to operate. And during welding assembly, the coaxiality, the parallelism and the perpendicularity of the whole helium tank part after assembly can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of helium tank processing, and in particular to a helium tank welding fixture and a helium tank welding method. Background Art

[0002] 3.9GHz-9cell helium tank welding uses electron beam welding machine and vacuum glove welding box to achieve welding. In the process of product production and manufacturing, each helium tank is composed of dozens of parts. Welding requires manual marking and adjustment to the theoretical size before welding. The various parts are combined and welded. The existing fixtures use pull rods to assemble the workpiece, and the product is clamped and fixed by the main shaft of the electron beam welder. Only one workpiece can be welded in one furnace. In the production and manufacturing process, not only is the welding of a single part time-consuming, but also the coaxiality, parallelism, verticality and other dimensions between the helium tank parts after welding mostly do not meet the requirements and need to be reworked. The work efficiency of a single product is low and the qualified rate is low. Summary of the invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a helium tank welding fixture.

[0004] A helium tank welding fixture comprises a base, a connecting shaft, a first support plate, a second support plate, a first support rod, and a second support rod; The base is provided with a card slot, and a limiting hole is provided at the bottom of the card slot; One end of the connecting shaft is connected to a limiting hole on the base; The first support plate is fixedly sleeved on the connecting shaft and the first support plate is arranged concentrically with the base, and the outer wall of the first support plate can support the inner wall of the helium tank part A; The second support plate is fixedly sleeved on one side of the first support plate of the connecting shaft principle, the second support plate is arranged concentrically with the first support plate, and the outer wall of the second support plate can support the inner wall of the helium tank part D; The first support rod is used to limit and fix the position of the helium tank part B; The second support rod is used to limit and fix the position of the helium tank part E.

[0005] Preferably, the connecting shaft comprises a left shaft and a right shaft installed coaxially; one end of the left shaft is connected to the limiting hole, and the other end of the left shaft is threadedly connected to the right shaft.

[0006] Preferably, the second supporting plate includes a first chuck and a second chuck; the first chuck is fixedly sleeved on the left shaft, the second chuck is fixedly sleeved on the right shaft, and the second chuck and the first chuck can be matched together.

[0007] Preferably, a first protrusion is provided at one end of the left shaft close to the right shaft, and a second protrusion is provided at one end of the right shaft close to the left shaft, so as to limit the movement of the first chuck and the second chuck.

[0008] Preferably, the distance between the first protrusion and the second protrusion is the thickness of the first chuck and the second chuck after they are aligned.

[0009] Preferably, the first chuck is provided with a groove, and the second chuck is provided with a boss matched with the groove, so as to achieve docking between the first chuck and the second chuck.

[0010] There is also a need for a helium tank welding method.

[0011] A helium tank welding method, using the above-mentioned helium tank welding fixture for welding assembly, comprises the following steps: S1: According to the assembly relationship, install one end of the helium tank part A into the slot on the base to ensure that the helium tank part A is fixed and the plane is in contact without shaking; S2: insert the four first support rods into the mounting holes on the base respectively, and then insert the mounting holes on the helium tank part B into the other ends of the first support rods to complete the installation of the helium tank part B. Use a C-type clamp to fix the base and the helium tank part B, and use handheld laser welding to connect the helium tank part A and the helium tank part B; S3: According to the assembly relationship, install one end of the helium tank part D into the slot on the base to ensure that the helium tank part D is fixed and the plane is in contact without shaking; S4: insert the four second support rods into the mounting holes on the base respectively, and then insert the mounting holes on the helium tank part E into the other ends of the second support rods to complete the installation of the helium tank part E. Use a C-type clamp to fix the base and the helium tank part E, and use handheld laser welding to connect the helium tank part D and the helium tank part E; S5: Place the base on the platform, then insert the left shaft into the limiting hole on the base and fix it, install the first support plate, install the helium tank part A, the first chuck, and the helium tank part C in sequence for assembly, then dock the second chuck with the first chuck, then insert the right shaft into the middle hole of the second chuck and thread it with the left shaft and fix it, finally install the helium tank part D, use the C-type clamp to fix the helium tank part B and the base, and then all the parts can be fixed to form a whole; S6: According to the requirements of the welding workpiece, the helium tank part A, the helium tank part C and the helium tank part D are spot welded using a handheld laser welding machine.

[0012] Preferably, in step S2, it is necessary to ensure that the height difference between the helium tank part B and the base in all directions does not exceed 0.1 mm.

[0013] Preferably, in step S2, it is necessary to ensure that the height difference between the helium tank part E and the base in all directions does not exceed 0.1 mm.

[0014] Compared with the prior art, the helium tank welding fixture and helium tank welding method provided by the present invention use welding fixtures to achieve the welding of helium tank parts in parts and in whole, and are suitable for batch welding of helium tank parts. Welding with different requirements can be achieved through different combinations of fixtures, and there is no need to mark or mark before welding. Welding can be performed after installation according to the assembly relationship, which reduces the work process and steps, improves work efficiency, and is simple, convenient and easy to operate. Positioning is achieved through the base, and then the coaxiality between the helium tank parts A, B and D, E is ensured through the assembly relationship; the first support rod and the second support rod calculate the fixed size according to the assembly relationship, and the size of the helium tank parts and the parallelism with the parts are limited by the two ends of the first support rod and the second support rod; the whole set of welding fixtures uses the base as the reference and the connecting shaft as the intermediate shaft to install the welding fixture and the helium tank parts in sequence, and the positioning and assembly are used to limit the overall coaxiality, parallelism and verticality of the helium tank parts after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. 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 these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure.

[0018] Figure 3 It is a structural schematic diagram of the base of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the first chuck of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the second chuck of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure after the present invention is assembled with the helium tank.

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure.

[0023] Figure 8 It is a schematic diagram of the structure when the helium tank part A and the helium tank part B are assembled in the present invention.

[0024] Fig. 9 It is a schematic diagram of the structure when the helium tank part D and the helium tank part E are assembled in the present invention.

[0025] In the figure: base 01, slot 11, limiting hole 12, connecting shaft 02, left shaft 21, first protrusion 211, right shaft 22, second protrusion 221, first support plate 03, second support plate 04, first chuck 41, groove 411, second chuck 42, boss 421, first support rod 05, second support rod 06, helium tank part A07, helium tank part B08, helium tank part C09, helium tank part D10, helium tank part E20. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] Please see Figure 1 , Figure 2In one embodiment, the present invention provides a helium tank welding fixture, including a base 01, a connecting shaft 02, a first support plate 03, a second support plate 04, a first support rod 05, and a second support rod 06; a card slot 11 is provided on the base 01, and a limiting hole 12 is provided at the bottom of the card slot 11; and a mounting hole for installation is opened on the base 01. One end of the connecting shaft 02 is connected to the limiting hole 12 on the base 01; so that the connecting shaft 02 can be in a vertical state with the base 01. The first support plate 03 is fixedly mounted on the connecting shaft 02 and the first support plate 03 is arranged concentrically with the base 01, and the outer wall of the first support plate 03 can support the inner wall of the helium tank part A07. The second support plate 04 is fixedly mounted on the side of the connecting shaft 02 and the first support plate 03, and the second support plate 04 is arranged concentrically with the first support plate 03, and the outer wall of the second support plate 04 can support the inner wall of the helium tank part D10. The first support rod 05 can be inserted into the mounting hole on the base 01, and the helium tank part B08 also has corresponding mounting holes. Usually, the helium tank part B08 has 12 mounting holes. During welding, after the first support rod 05 is connected to the base 01 and the helium tank part B08, the position of the helium tank part B08 can be restricted and fixed by the first support rod 05. The second support rod 06 can be inserted into the mounting hole on the helium tank part B08, and the helium tank part E20 also has corresponding mounting holes. Usually, there are 8 mounting holes on the helium tank part E20. During welding, after the first support rod 05 is connected to the base 01 and the helium tank part E20, the position of the helium tank part E20 can be restricted and fixed by the second support rod 06.

[0029] Please see Figures 1 to 5 Specifically, the connecting shaft 02 includes a left shaft 21 and a right shaft 22 installed coaxially; one end of the left shaft 21 is connected to the limiting hole 12, and the other end of the left shaft 21 is threadedly connected to the right shaft 22.

[0030] Specifically, the second support plate 04 includes a first chuck 41 and a second chuck 42; the first chuck 41 is fixedly mounted on the left shaft 21, and the second chuck 42 is fixedly mounted on the right shaft 22, and the second chuck 42 and the first chuck 41 can be matched together. When the second chuck 42 is matched and connected with the first chuck 41, the inner wall of the helium tank part D10 can be supported by the first chuck 41 and the second chuck 42.

[0031] Among them, a first protrusion 211 is provided at one end of the left shaft 21 close to the right shaft 22, and a second protrusion 221 is also provided at the end of the right shaft 22 close to the left shaft 21. The first protrusion 211 and the second protrusion 221 can limit the axial movement of the first chuck 41 and the second chuck 42.

[0032] To further explain, the distance between the first protrusion 211 and the second protrusion 221 is the thickness of the first chuck 41 and the second chuck 42 after they are aligned, which can ensure that the first chuck 41 and the second chuck 42 are stably aligned.

[0033] The first chuck 41 is provided with a groove 411, and the second chuck 42 is provided with a boss 421 adapted to the groove 411. After the first chuck 41 and the second chuck 42 are docked, the boss 421 is inserted into the groove 411 to realize the first chuck 41 and the second chuck 42. Of course, in order to facilitate installation, the first chuck 41 and the second chuck 42 can be provided with corresponding middle holes so that the left shaft 21 and the right shaft 22 can pass through the first chuck 41 and the second chuck 42 respectively.

[0034] In one embodiment, the present invention provides a helium tank welding method, using the helium tank welding fixture to perform welding assembly. The helium tank welding fixture comprises a base 01, a connecting shaft 02, a first supporting plate 03, a second supporting plate 04, a first supporting rod 05, and a second supporting rod 06; a card slot 11 is provided on the base 01, and a limiting hole 12 is provided at the bottom of the card slot 11; and a mounting hole for installation is provided on the base 01. One end of the connecting shaft 02 is connected to the limiting hole 12 on the base 01, so that the connecting shaft 02 can be in a vertical state with the base 01. The first supporting plate 03 is fixedly mounted on the connecting shaft 02 and the first supporting plate 03 is arranged concentrically with the base 01, and the outer wall of the first supporting plate 03 can support the inner wall of the helium tank part A07. The second supporting plate 04 is fixedly mounted on one side of the connecting shaft 02 and the first supporting plate 03, and the second supporting plate 04 is arranged concentrically with the first supporting plate 03, and the outer wall of the second supporting plate 04 can support the inner wall of the helium tank part D10. The first support rod 05 can be inserted into the mounting hole on the base 01, and the helium tank part B08 also has corresponding mounting holes. Usually, the helium tank part B08 has 12 mounting holes. During welding, after the first support rod 05 is connected to the base 01 and the helium tank part B08, the position of the helium tank part B08 can be restricted and fixed by the first support rod 05. The second support rod 06 can be inserted into the mounting hole on the helium tank part B08, and the helium tank part E20 also has corresponding mounting holes. Usually, there are 8 mounting holes on the helium tank part E20. During welding, after the first support rod 05 is connected to the base 01 and the helium tank part E20, the position of the helium tank part E20 can be restricted and fixed by the second support rod 06.

[0035] Please see Figures 1 to 5 Specifically, the connecting shaft 02 includes a left shaft 21 and a right shaft 22 installed coaxially; one end of the left shaft 21 is connected to the limiting hole 12, and the other end of the left shaft 21 is threadedly connected to the right shaft 22.

[0036] Specifically, the second support plate 04 includes a first chuck 41 and a second chuck 42; the first chuck 41 is fixedly mounted on the left shaft 21, and the second chuck 42 is fixedly mounted on the right shaft 22, and the second chuck 42 and the first chuck 41 can be matched together. When the second chuck 42 is matched and connected with the first chuck 41, the inner wall of the helium tank part D10 can be supported by the first chuck 41 and the second chuck 42.

[0037] Among them, a first protrusion 211 is provided at one end of the left shaft 21 close to the right shaft 22, and a second protrusion 221 is also provided at the end of the right shaft 22 close to the left shaft 21. The first protrusion 211 and the second protrusion 221 can limit the axial movement of the first chuck 41 and the second chuck 42.

[0038] To further explain, the distance between the first protrusion 211 and the second protrusion 221 is the thickness of the first chuck 41 and the second chuck 42 after they are aligned, which can ensure that the first chuck 41 and the second chuck 42 are stably aligned.

[0039] The first chuck 41 is provided with a groove 411, and the second chuck 42 is provided with a boss 421 adapted to the groove 411. After the first chuck 41 and the second chuck 42 are docked, the boss 421 is inserted into the groove 411 to realize the first chuck 41 and the second chuck 42. Of course, in order to facilitate installation, the first chuck 41 and the second chuck 42 can be provided with corresponding middle holes so that the left shaft 21 and the right shaft 22 can pass through the first chuck 41 and the second chuck 42 respectively.

[0040] The helium tank welding method comprises the following steps: S1: Please refer to Figure 8 According to the assembly relationship, install one end of the helium tank part A07 in the slot 11 on the base 01 to ensure that the helium tank part A07 is fixed and in plane contact without shaking; S2: insert the four first support rods 05 into the mounting holes on the base 01 respectively, and then insert the mounting holes on the helium tank part B08 into the other end of the first support rod 05 to complete the installation of the helium tank part B08. The first support rod 05 cooperates with the base 01, and the distance from the helium tank part B08 to the end of the helium tank part A07 can be ensured according to the assembly relationship; fix the base 01 and the helium tank part B08 with a C-type clamp, and connect the helium tank part A07 and the helium tank part B08 by handheld laser welding; it is necessary to ensure that the height difference between the helium tank part B08 and the base 01 in all directions does not exceed 0.1mm; S3: Please refer to Fig. 9According to the assembly relationship, install one end of the helium tank part D10 in the slot 11 on the base 01 to ensure that the helium tank part D10 is fixed and in plane contact without shaking; S4: insert the four second support rods 06 into the mounting holes on the base 01 respectively, and then insert the mounting holes on the helium tank part E20 into the other end of the second support rod 06 to complete the installation of the helium tank part E20. The second support rod 06 cooperates with the base 01. According to the assembly relationship, the distance from the helium tank part D10 to the end of the helium tank part can be ensured; fix the base 01 and the helium tank part E20 with a C-type clamp, and connect the helium tank part D10 and the helium tank part E20 by handheld laser welding; it is necessary to ensure that the height difference between the helium tank part E20 and the base 01 in all directions does not exceed 0.1mm S5: Please see Figure 6 , Figure 7 , place the base 01 on the platform, then insert the left shaft 21 into the limiting hole 12 on the base 01 and fix it, install the first support plate 03, install the helium tank part A07, the first chuck 41, and the helium tank part C09 in sequence for assembly. At this time, one end of the helium tank part A07 is still installed in the slot 11 on the base 01; then dock the second chuck 42 with the first chuck 41, and then insert the right shaft 22 into the middle hole of the second chuck 42 and thread it with the left shaft 21 and fix it, finally install the helium tank part D10, use the C-type clamp to fix the helium tank part B08 and the base 01, and then all the parts can be fixed to form a whole; S6: According to the requirements of the welding workpiece, the helium tank part A07, the helium tank part C09 and the helium tank part D10 are spot welded using a handheld laser welding machine.

[0041] Of course, V-blocks (or other external fixing tools) can be added to the outside of the helium tank parts A07 and DD, and the V-blocks can be connected with connecting rods and fixed on the outside to improve the coaxiality, parallelism and verticality of the helium tank.

[0042] In the present invention, since the helium tank part C09 is a bellows with a wall thickness of 1 mm and has a large elasticity, the coaxiality, parallelism and verticality between the helium tank parts will be affected by factors such as its own gravity, welding deformation and part size differences after free welding. The helium tank parts are welded in sections and assembled by different combinations of tooling to improve the coaxiality, parallelism and verticality between the helium tank parts and the helium tank as a whole.

[0043] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A helium tank welding fixture, characterized in that: It includes a base, a connecting shaft, a first supporting plate, a second supporting plate, a first supporting rod, and a second supporting rod; The base is provided with a card slot, and a limiting hole is provided at the bottom of the card slot; One end of the connecting shaft is connected to a limiting hole on the base; The first support plate is fixedly sleeved on the connecting shaft and the first support plate is arranged concentrically with the base, and the outer wall of the first support plate can support the inner wall of the helium tank part A; The second support plate is fixedly sleeved on one side of the first support plate of the connecting shaft principle, the second support plate is arranged concentrically with the first support plate, and the outer wall of the second support plate can support the inner wall of the helium tank part D; The first support rod is used to limit and fix the position of the helium tank part B; The second support rod is used to limit and fix the position of the helium tank part E.

2. The helium tank welding fixture according to claim 1, characterized in that: The connecting shaft comprises a left shaft and a right shaft which are coaxially mounted; one end of the left shaft is connected to the limiting hole, and the other end of the left shaft is threadedly connected to the right shaft.

3. The helium tank welding fixture according to claim 2, characterized in that: The second supporting plate includes a first chuck and a second chuck; the first chuck is fixedly sleeved on the left shaft, the second chuck is fixedly sleeved on the right shaft, and the second chuck and the first chuck can be matched together.

4. The helium tank welding fixture according to claim 3, characterized in that: A first protrusion is arranged at one end of the left shaft close to the right shaft, and a second protrusion is arranged at one end of the right shaft close to the left shaft, so as to limit the movement of the first chuck and the second chuck.

5. The helium tank welding fixture according to claim 4, characterized in that: The distance between the first protrusion and the second protrusion is the thickness of the first chuck and the second chuck after they are aligned.

6. The helium tank welding fixture according to claim 3, characterized in that: The first chuck is provided with a groove, and the second chuck is provided with a boss matched with the groove, so as to achieve docking between the first chuck and the second chuck.

7. A helium tank welding method, using the helium tank welding fixture according to any one of claims 1 to 6 for welding and assembly, characterized in that: The following steps are included: S1: According to the assembly relationship, install one end of the helium tank part A into the slot on the base to ensure that the helium tank part A is fixed and the plane is in contact without shaking; S2: insert the four first support rods into the mounting holes on the base respectively, and then insert the mounting holes on the helium tank part B into the other ends of the first support rods to complete the installation of the helium tank part B. Use a C-type clamp to fix the base and the helium tank part B, and use handheld laser welding to connect the helium tank part A and the helium tank part B; S3: According to the assembly relationship, install one end of the helium tank part D into the slot on the base to ensure that the helium tank part D is fixed and the plane is in contact without shaking; S4: insert the four second support rods into the mounting holes on the base respectively, and then insert the mounting holes on the helium tank part E into the other ends of the second support rods to complete the installation of the helium tank part E. Use a C-type clamp to fix the base and the helium tank part E, and use handheld laser welding to connect the helium tank part D and the helium tank part E; S5: Place the base on the platform, then insert the left shaft into the limiting hole on the base and fix it, install the first support plate, install the helium tank part A, the first chuck, and the helium tank part C in sequence for assembly, then dock the second chuck with the first chuck, then insert the right shaft into the middle hole of the second chuck and thread it with the left shaft and fix it, finally install the helium tank part D, use the C-type clamp to fix the helium tank part B and the base, and then all the parts can be fixed to form a whole; S6: According to the requirements of the welding workpiece, the helium tank part A, the helium tank part C and the helium tank part D are spot welded using a handheld laser welding machine.

8. The helium tank welding method according to claim 7, characterized in that: In step S2, it is necessary to ensure that the height difference between the helium tank part B and the base in all directions does not exceed 0.1 mm.

9. The helium tank welding method according to claim 7, characterized in that: In step S2, it is necessary to ensure that the height difference between the helium tank part E and the base in all directions does not exceed 0.1 mm.

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