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Abstract: Based
on the analysis of the balance of heat generating and dispersing after
the friction stir welding (FSW) procedure being steady, the numeric
model of welding temperature is established. It can be seen that a lot
of influencing factors on the temperature are enclosed, such as the
physical natures of the welded material and the material of stir tool,
the friction coefficient between the two sliding materials, the
dimensions of the stir tool, the welding parameters, the pressure on the
surface and on the side face of welded plate etc. The relationships
between some factors are complex, being affected by each other. The
principal factors are rotation speed of stir tool, friction coefficient
between the stir tool and the workpiece, the pressure on the surface and
on the side face of welded plate. The validity of the model is testified
by FSW on PVC plate. The calculated welding temperature is considerably
identical with the measured one provided some parameter values are taken
in a suitable range.
Key words:Friction
stir welding Welding temperature Numeric model
CLC No: TG453
Received 20050719, received in
revised form 20060302
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