Assessment of HCLL-TBM optimum welding sequence scenario to minimize welding distortions - Archive ouverte HAL Access content directly
Conference Papers Year : 2016

Assessment of HCLL-TBM optimum welding sequence scenario to minimize welding distortions

(1) , (1) , (1) , (1) , (2) , (3)
1
2
3

Abstract

The ITER HCLL-TBM (Helium Cooled Lithium Lead Test Blanket Module) box assembly development implies the welding development of the following components the Box and the Stiffening Grid (SG) made of vertical and horizontal Stiffening Plates (noted respectively v-SP and h-SP). This multi-chamber box structure in EUROFER97 steel is made of plates cooled by multiple meandering channels where circulates pressurized helium. For the assembly of these components, characterized by numerous multipass welds, Gas Tungsten Arc Welding (GTAW) is envisaged as reference process. Moreover, the TBM has large dimensions and thin plates which makes it very sensitive to welding distortions and is problematic regarding the assembly feasibility and compliance with geometric tolerances. This paper presents the numerical simulation and experimental work performed to optimize the v-SP to box assembly sequence, which is the most critical assembly regarding distortions, in order to minimize welding distortions. One of the technical lock of this study is high calculation times needed for this large component which implies to set up a simplified welding simulation method. The study is composed of three main phases an experimental-numerical study of a T-joint fillet mock-up GTAW used to develop the preliminary welding procedure and to validate a simplified simulation method, a numerical optimization of the v-SP to box welding sequence via the simplified method, and the experimental application of the optimized v-SP to Box welding sequence on the TBM mock-up. The calculation and comparison of four different v-SP to box welding sequences allowed to identify the best sequence regarding welding distortions and to apply it experimentally.
Fichier principal
Vignette du fichier
201600000623.pdf (909.62 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-02442290 , version 1 (16-01-2020)

Identifiers

  • HAL Id : cea-02442290 , version 1

Cite

O. Doyen, N. Rizzo, L. Forest, J. Tosi, N. Thomas, et al.. Assessment of HCLL-TBM optimum welding sequence scenario to minimize welding distortions. SOFT 2016 - 29th edition of the Symposium on Fusion Technology, Sep 2016, Prague, Czech Republic. ⟨cea-02442290⟩

Collections

CEA DEN
14 View
128 Download

Share

Gmail Facebook Twitter LinkedIn More