Open Access
Subscription Access
Open Access
Subscription Access
Welding Distortion Assessment for Hydraulic Connections of Complex Assembly of Neutral Beam Accelerator Grid
Subscribe/Renew Journal
Negative Ion Neutral Beam (NB) accelerator grids, made up of Oxygen free copper are actively cooled and are connected to external hydraulic circuit by welded connection. Cooling pipes are of SS316L material and Grids are manufactured with the oxygen free material (CuOF), which are welded with the transition stubs provided of Inconel material. Grids have the very high tolerances (in the range of microns) in terms angles, flatness and positional accuracy of the features. The welding of cooling pipe assembly to the grid plate introduce distortion which can affect the achieved tolerances on the main functional area of the machined grids.
Considering the requirement of angles, flatness and the positional tolerances of gird plate and its features; the need arises to have the assessment of weld induced distortion on functional area of CuOF Plate. Additionally, it is also necessary to assess the direction of the stress propagation, considering the dissimilar weld and having the mass difference in the plate and pipe assembly. Various configurations have been assessed and the welding simulation was performed to study the distortion on the assembly.
Keywords
- Slovacek M, Tejc J, Vanek M (2016); Using of welding virtual numerical simulation as the technical support for industry, Advanced Materials Research, 1338, pp.49-55.
- Anca A, Cardone A, Risso J, Fachinotti VD (2011); Finite element modelling of welding process, Applied Mathematical Modelling, 35, pp.688-707.
- Mukherjee T, De A (2014); Three-dimensional heat transfer analysis of laser-arc hybrid welding process, Indian Welding Journal, 47(4), pp. 57-64.
- Kiran DV, De A (2012); Efficient estimation of volumetric heat source in numerical simulation of fusion arc welding process, Indian Welding Journal, 45(4), pp. 51-65.
- Dhas ER, Kumanan S (2011); Modeling of residual stress in butt welding, Materials and Manufacturing Processes, 26, pp. 942-947.
- Tekriwal P, Mazumdar J (1998); Finite element analysis of three dimensional heat transfer in gas manual arc welding, Welding Research Supplement, Welding Journal, 56, pp.150-156.
- Dean D, Murakawa H, Liang W (2007); Numerical simulation of welding distortion in large structures, Computational Methods: Appl. Mech. Engrg. 196, pp. 4613-4627.
- Brown S, Song H (1992); Implication of three dimensional numerical simulation of welding of large structures. Welding Research Supplement, Welding Journal, 50, pp.55-62.
- Joshi J, Chakraborty A, Patel H, Singh MJ, Bandyopadhyay M, Pfaff E, Schäfer J, Eckardt C, Metz A, Gelfert M (2019); Technologies for the realization of large size RF sources for negative neutral beam system for ITER challenges, experience and the path ahead, Nuclear Fusion, 59(9), 096007.
- Davis JW, Smith PD (2002); ITER Material Properties Handbook, Volume 233–237, Part 2, pp.1593-1596.
Abstract Views: 225
PDF Views: 4