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Electron beam welding method for nuclear fuel lower tube base adopting local 3D printing structure

An electron beam welding and 3D printing technology, applied in electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of time-consuming, labor-intensive, time-wasting and money-wasting, and achieve good economic value and increase the first-time yield. Effect

Pending Publication Date: 2022-03-18
CNNC JIANZHONG NUCLEAR FUEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the existing technology, technicians can only weld carefully, and then select better quality products from the finished products as qualified products, which is not only time-consuming and labor-intensive, but also wastes a lot of time and money

Method used

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  • Electron beam welding method for nuclear fuel lower tube base adopting local 3D printing structure
  • Electron beam welding method for nuclear fuel lower tube base adopting local 3D printing structure
  • Electron beam welding method for nuclear fuel lower tube base adopting local 3D printing structure

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Embodiment Construction

[0038] Although the electron beam welding method of the nuclear fuel lower nozzle adopting a partial 3D printing structure of the present invention can be implemented in many different ways, this article will describe the exemplary embodiments in detail with reference to the accompanying drawings, without intending to limit the protection of the present invention The scope is limited to the exemplary embodiments. Accordingly, the drawings and description of the detailed description are to be considered as illustrative in nature of the invention and not as limiting.

[0039] The following will be further described in detail through specific embodiments.

[0040] The present invention provides an electron beam welding method of a nuclear fuel lower pipe seat adopting a partial 3D printing structure, comprising the following steps:

[0041] Step S1: Welding process control sample

[0042] Before each production shift welds the product, use the product welding parameter welding ...

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Abstract

The invention provides an electron beam welding method for a nuclear fuel lower tube base adopting a local 3D printing structure, which is characterized by comprising the following steps: S1, welding a process control sample; s2, the welding part is clamped and rigidly limited; s3, testing the pressure rise rate of a welding vacuum chamber, and vacuumizing a gun chamber of the welding chamber; s4, calibrating a focus and a track of the electron beam; s5, vacuum electron beam spot welding is conducted on a welding seam of the lower pipe base; s6, vacuum electron beam welding is conducted on a welding seam of the lower pipe base; and S7, rigid limiting of the lower pipe base is relieved. According to the electron beam welding method for the nuclear fuel lower tube base adopting the local 3D printing structure, welding deformation can be effectively controlled, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing nuclear fuel components, in particular to an electron beam welding method for a nuclear fuel lower tube seat with a partial 3D printing structure. Background technique [0002] The CF3 lower nozzle is one of the key components of the Hualong No. 1 nuclear fuel assembly. It has irreplaceable functions such as positioning the core position of the fuel assembly, constraining the positioning skeleton, and filtering foreign matter in the primary circuit circulation. Due to the special structure, the connecting plate structure of the lower pipe seat is manufactured by metal 3D printing, the other part (frame plate) is manufactured by machining, and the two parts are finally connected together by electron beam welding. Because the welds between the lower tube base connecting plate and the frame plate are to bear the preload resistance in the component stack, the fluid scouring shear force in the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/00B23K15/06
CPCB23K15/0046B23K15/06
Inventor 张丽英秦国鹏尹富斌陈仲权李金魁
Owner CNNC JIANZHONG NUCLEAR FUEL
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