CN-122007696-A - Welding device and welding method for TF coil box

Abstract

The invention relates to the field of nuclear fusion devices and discloses a welding device and a welding method of a TF coil box, wherein the device comprises a base, a welding head and a welding head, wherein the base is provided with a first direction and a second direction; the bending section clamping mechanism is arranged on the base and comprises two second clamping parts which are spaced and symmetrical in the second direction, the second clamping parts and the first clamping parts can detect displacement and stress in the second direction and can apply clamping force in the second direction in a telescopic mode, and the top clamping mechanism is arranged on the base and is configured to detect displacement and stress in the first direction and can apply clamping force in the first direction in a telescopic mode. According to the invention, through the cooperative cooperation of the dynamic adjustable clamping force and the real-time displacement stress monitoring device, the magnitude and the direction of the clamping force can be adjusted in real time, the rebound deformation of the tool after the tool is removed is eliminated, and the consistency and the reliability of the welding quality are improved.

Inventors

• LI FEI
• ZHANG FENG
• JIANG YINGWU

Assignees

• 聚变新能(安徽)有限公司

Dates

Publication Date

20260512

Application Date

20260410

Claims (10)

1. 1. A welding device for TF coil boxes, comprising: a base having a first direction and a second direction perpendicular to each other; The straight section clamping mechanisms are arranged on the base and are arranged in a plurality along the first direction, and each straight section clamping mechanism comprises two first clamping parts which are spaced in the second direction and are symmetrical; The bending section clamping mechanism is arranged on the base and comprises two second clamping parts which are spaced and symmetrical in the second direction, and the second clamping parts and the first clamping parts are configured to be capable of detecting displacement and stress in the second direction and can telescopically apply clamping force in the second direction; a top end clamping mechanism disposed on the base and configured to detect displacement and stress in the first direction and to telescopically apply a clamping force in the first direction.
2. 2. The TF coil case welding apparatus according to claim 1, wherein said first clamping portion comprises a first force application member provided on said base and configured to detect displacement and stress in said second direction and to telescopically apply a clamping force in said second direction, and a first pressing member connected to said first force application member and perpendicular to said first direction and said second direction.
3. 3. The TF coil case welding apparatus according to claim 1 or 2, wherein said second clamping portion comprises a second force application member provided on said base and configured to detect displacement and stress in said second direction and to telescopically apply a clamping force in said second direction, and a second pressing member connected to said second force application member and disposed perpendicularly to said second direction and obliquely with respect to said first direction.
4. 4. The TF coil case welding apparatus according to claim 1, wherein said top clamping mechanism comprises a third force application member provided on said base and configured to detect displacement and stress in said first direction and to telescopically apply clamping force in said first direction, and a fixing frame provided with a limiting hole for fixing the top of the TF coil case, said fixing frame being parallel to said first and second directions.
5. 5. The TF coil case welding apparatus according to claim 4, wherein the fixing frame comprises a main frame body connected to the third force application member, and an opening is formed at one end of the main frame body away from the third force application member, and a side shield plate provided at one side of the main frame body away from the third force application member, and detachably connected to the main frame body by a bolt.
6. 6. The TF coil case welding apparatus according to claim 1, wherein said base comprises a bottom plate and side plates, said bottom plate is elongated in said first direction, said bottom plate is provided with said side plates at both ends of said first direction, said side plates are perpendicular to said bottom plate, said first clamping portion and said second clamping portion are provided on said bottom plate, and said top clamping mechanism is provided on said side plates.
7. 7. A welding method of a TF coil case, wherein the TF coil case is welded using the welding apparatus of a TF coil case according to any one of claims 1 to 6, the TF coil case comprising a straight line section and two curved sections provided at both ends of the straight line section in a length direction, the welding method comprising: fixing the straight line segment to the base by the two first clamping portions, and fixing the curved segment to the base by the two second clamping portions and the top clamping mechanism; In the welding process of the straight line segment and the bent segment, the first clamping part, the second clamping part and the top clamping mechanism detect first displacement and first stress variables of corresponding positions in real time, and reversely adjust clamping force according to the detected first displacement and first stress variables so as to offset the corresponding first displacement and first stress variables; In the process of finishing welding and cooling to a target temperature interval, the first clamping part, the second clamping part and the top clamping mechanism continue to detect a second displacement amount and a second stress variable in real time, and reversely adjust clamping force according to the detected second displacement amount and second stress variable so as to offset the corresponding second displacement amount and second stress variable; The first clamping portion, the second clamping portion, and the top clamping mechanism release the TF coil case.
8. 8. The method of welding a TF coil case according to claim 7, wherein before the step of releasing the TF coil case by the first clamping portion, the second clamping portion, and the top clamping mechanism, the method further comprises: And determining that the TF coil box is welded when the first clamping part, the second clamping part and the top end clamping mechanism do not detect the displacement and the stress within a set time period.
9. 9. The method of welding a TF coil case according to claim 7, wherein in the step of fixing the straight line segment to the base by two first clamping portions and fixing the curved segment to the base by two second clamping portions and the tip clamping mechanism, further comprising: the first clamping part, the second clamping part and the top clamping mechanism are subjected to numerical value zero clearing setting on the currently detected corresponding displacement and stress.
10. 10. A method of welding a TF coil case according to any one of claims 7 to 9, wherein said straight clamping means is provided with at least three and fixes at least both ends and intermediate positions of said straight section during said fixing of said straight section to said base by said two first clamping portions.

Description

Welding device and welding method for TF coil box Technical Field The invention relates to the technical field of nuclear fusion device magnet engineering manufacture, in particular to a welding device and a welding method of a TF coil box. Background The TF coil box in the Tokamak device is used for coating and supporting the superconducting TF coil, and not only bears the installation and positioning functions of the superconducting coil, but also bears huge electromagnetic force and structural load in the running process of the device. The TF coil box is used as a core component of the Tokamak device, has the characteristics of oversized size (up to more than 20 meters), super-thick section (wall thickness is more than 100mm, partial area can reach 200-300 mm) and complex structure (in a D-shaped curved surface), and the welding manufacture faces serious stress and deformation control challenges. In the related art, a rigid constraint tool is generally adopted, namely various fixed tools are used for fixing the TF coil box, and although welding deformation can be limited, huge constraint stress can be accumulated in a workpiece, and rebound deformation easily occurs after the tool is removed, so that the geometric accuracy of the TF coil box and the position of a current center line are affected. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the welding device for the TF coil box provided by the invention can apply controllable prestress to the TF coil box, is beneficial to reducing welding residual stress, inhibiting welding deformation and improving geometric accuracy and use reliability of a welded structure. The invention also aims to provide a welding method of the TF coil box, so as to apply the welding device of the TF coil box. The welding device for the TF coil box comprises a base, a straight section clamping mechanism, a top clamping mechanism and a bending section clamping mechanism, wherein the base is provided with a first direction and a second direction which are perpendicular to each other, the straight section clamping mechanism is arranged on the base and is provided with a plurality of straight section clamping mechanisms along the first direction, the straight section clamping mechanism comprises two first clamping portions which are spaced and symmetrical in the second direction, the bending section clamping mechanism is arranged on the base and comprises two second clamping portions which are spaced and symmetrical in the second direction, the second clamping portions and the first clamping portions are configured to be capable of detecting displacement and stress in the second direction and applying clamping force in a telescopic mode in the second direction, and the top clamping mechanism is arranged on the base and is configured to be capable of detecting displacement and stress in the first direction and applying clamping force in a telescopic mode in the first direction. According to the welding device for the TF coil box, disclosed by the embodiment of the invention, the dynamic adjustable clamping force of the straight section clamping mechanism, the bent section clamping mechanism and the top end clamping mechanism are matched with the real-time displacement stress monitoring device, so that the magnitude and the direction of the clamping force can be adjusted in real time according to the displacement and stress feedback information, the active regulation and the self-adaptive release of the stress in the welding process are realized, the rebound deformation after the fixture is removed is effectively eliminated, the geometric precision of the TF coil box is improved, meanwhile, the local stress accurate compensation can be carried out on the TF coil box, the residual stress level is reduced, and the consistency and the reliability of the welding quality of the TF coil box are improved. In some embodiments of the present invention, the first clamping portion includes a first force application member and a first compression member, where the first force application member is disposed on the base and configured to detect a displacement and a stress in the second direction, and to apply a clamping force telescopically in the second direction, and the first compression member is connected to the first force application member and perpendicular to the first direction and the second direction. In some embodiments of the present invention, the second clamping portion includes a second force application member and a second pressing member, where the second force application member is disposed on the base and configured to detect a displacement and a stress in the second direction, and to apply a clamping force in the second direction in a telescopic manner, and the second pressing member is connected to the second force application member, and is disposed perpendicular to the second directio