Three dimensional simulation of robot path, heat transfer and residual stresses of a welded part with complex geometry

• In this article a simulation system is presented that combines computer aided robotics software used to define the welding operation, with a finite element model that predicts temperature-time histories and residual stress distributions for welding applications. The objective is to develop a tool for engineering processes in which robot trajectories and welding process parameters can be optimized off-line on parts with complex geometries. The system was evaluated on a stainless steel gas turbine component. Temperature dependent properties and phase change were included in the analysis. The turbine component was welded using an in-house TIG welding cell. The assumptions and principles that underpin the modeling techniques are presented together with predicted temperature histories, residual stresses, and fixture forces. Predicted residual stresses were compared with neutron diffraction measurements.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Annan teknik -- Övrig annan teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)

Nyckelord

Finite element analysis; Off-line programming; Residual stress measurments: Computer aided engineering; Computer programming; Computer simulation; Computer software; Finite element method; Fixtures (tooling); Heat transfer; Mathematical models; Residual stresses; Stainless steel; Welding

Other processing/assembly

Övrig bearbetning/sammanfogning

Other technology

Övriga teknikvetenskaper

Manufacturing and materials engineering

Produktions- och materialteknik

Publikations- och innehållstyp

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