Tool-workpiece interface temperature measurement and improved closed-loop control in friction stir welding
- Fehrenbacher A. ,
- Duffie N.A. ,
- Ferrier N.J. ,
- et al
- Fehrenbacher A. ,
- Duffie N.A. ,
- Ferrier N.J. ,
- Zinn M.R. and
- Pfefferkorn F.E.
Links
Repository
Description
A real-time wireless temperature measurement system was developed to facilitate improved temperature measurement at the tool-workpiece interface and a closed-loop control system for friction stir welding (FSW) that maintains weld quality under various process disturbances. The approach incorporated drilling two through holes into the tool shank by electric discharge machining and inserting thermocouples into the holes. In order to correlate the temperature measurements with the angular position of the FSW tool, a Hall effect proximity sensor was employed. A wireless data transmission system was used to transmit the measurements in real time to a stationary data acquisition and control system. Bead-on-plate and butt welding trials were undertaken on AA 6061-T6 aluminium alloy workpieces (thickness 3.18-6.35 mm) at plunge depths of 4.6-5 mm. Full factorial experiments were conducted at spindle speeds of 700-1700 rpm and travel speeds of 100-500 mm/min. Issues discussed include interface temperature dynamics, weld quality and closed-loop control of temperature.
9th International Symposium, 15-17 May 2012, Session 4B: Modelling I, Paper 02
Related Records
