Modelling of the friction stir welding process for torque-based temperature control
- Bachmann A. ,
- Zens A. ,
- Hartl R. ,
- et al
- Bachmann A. ,
- Zens A. ,
- Hartl R. and
- Zaeh M.F.
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An indirect temperature measurement system was developed based on the acquisition of torque and process forces during friction stir welding (FSW) and a mathematical model incorporating a grey box approach was formulated to determine the correlation between torque, process forces and welding temperature. The process torque was derived from analytical expressions for heat sources in thermal simulation models of FSW. An estimator was introduced to minimise the torque error by adjusting the estimated welding temperature. The performance of the estimator was evaluated from bead-on-plate welding experiments performed on AW 6082-T6 aluminium alloys at rotational speeds of 500-2920 rpm, travel speeds of 240-800 mm/min and downward forces of 6.25-7.8 kN. Comparisons of measured and predicted temperature evolutions are discussed.
12th International Symposium, 26-28 Jun 2018, Session 9B: Modelling II, Paper 02
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