求助！材料专业英语翻译

Pre-studies on the forming behaviour of TRB
Obtaining the know-how to produce flexibly rolled
blanks with defined thickness transitions was only the first
step towards the introduction of TRB in the automotive
industry. In order to study the forming behaviour of TRB
in deep drawing processes, enabling the prediction of their
behaviour and introducing improvement measures, several
similar tool set-ups have been developed and tested.
Starting with rigid tools, designed for blanks with a
constant sheet thickness, the blankholder geometry has
been modified to the initial sheet thickness distribution
of the TRB. Therefore, the loss of contact between
blankholder and blank, which results in the formation of
wrinkles in the flange without tool adaptations, could be
reduced. Subsequently, an elastic blankholder system,
consisting of a multilayer construction of thin blanks and
a polyurethane plate, has been tested.

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