A kind of iter first wall edge finger welding fixture and using method thereof

Abstract

The invention discloses an ITER first wall edge finger welding fixture and a method for using the same. The slope is lower than the first slope; the abdominal limit block, the two abdominal limit blocks are respectively fixedly connected with the top surface of the abdomen base outside the first slope and the second slope; the head base, one end of the two head bases is fixedly connected with the abdomen base , the head limit block, the two head limit blocks are respectively fixed on the outside of the top surface of the two head bases; the chimeric block, the two chimeric blocks are respectively fixed and connected on the opposite surface of the two head bases and the abdomen base, Since the second slope is 0.17mm lower than the first slope, after welding, the two arc surfaces are kept on the same arc surface under the joint force of the upper half edge of the finger and the welding seam, so that the welding deformation of the finger cooling channel butt joint It has been effectively controlled, and the qualified rate of product welding has reached 91% after testing.

Description

technical field [0001] The invention relates to an ITER first wall edge finger welding fixture and a using method thereof, belonging to the technical field of fusion component processing. Background technique [0002] In the International Thermonuclear Experimental Reactor (ITER), the first wall part is used as the internal part of the fusion reactor, which will directly bear the high heat load and high-energy neutron damage from the high-temperature plasma, and protect the other main components of the fusion reactor to operate safely and reliably; This requires the first wall components to have very high reliability and safety; the first wall, as the core component in the fusion reactor, has a very complex structure, consisting of a large number of parts with different functions through precision It is assembled by assembly and welding; a large number of welding processes are involved in the specific processing, and due to the existence of welding deformation in each step, ...

AI Technical Summary

Problems solved by technology

[0002] In the International Thermonuclear Experimental Reactor (ITER), the first wall part is used as the internal part of the fusion reactor, which will directly bear the high heat load and high-energy neutron damage from the high-temperature plasma, and protect the other main components of the fusion reactor to operate safely and reliably; This requires the first wall components to have very high reliability and safety; the first wall, as the core component in the fusion reactor, has a very complex structure, consisting of a large number of parts with different functions through precision It is assembled by assembly and welding; a large number of welding processes are involved in the specific processing, and due to the existence of welding deformation in each step, there will be safety hazards to the entire fusion reactor;

[0003] The first wall is welded by edge fingers and standard finger cooling channel butt pipes, and then assembled and welded with the center beam, so the welding of fingers is quite important; at present, when welding two fingers, two fingers are required after welding Only when the inner concave surface reaches the same plane can it be considered qualified. At present, the welding fixture (Chinese patent application number is 2019109143840 ITER first wall finger cooling channel butt joint pipe welding fixture) has a pass rate of 42.5% for positioning welding of two fingers. The material requirements for nuclear fusion components are high, and they have gone through multiple processes before finger welding, with a welding pass rate of 42.5%, resulting in waste of raw materials for two fingers, increasing production costs, and reducing production efficiency

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