Method for determining shape changes of a workpiece

Details Method for determining shape changes of a workpiece Method for determining shape changes of a workpiece

G - Physics

01

B

G01B 11/16 (2006.01) C09D 5/18 (2006.01)

Patent

CA 2739847

The invention relates to a method for determining shape changes of a workpiece made of steel or a steel alloy due to forming, in which a varnish is applied to the workpiece, the workpiece is formed and then an optical shape change analysis is carried out by measuring the applied varnish. The object of providing a method for determining shape changes of a workpiece made of steel or a steel alloy, said method also being suitable for analyzing the shape change of a workpiece after hot forming, is solved according to the teaching of the present invention in that before the forming of the workpiece a varnish with an Al proportion of more than 30% by weight is applied to the workpiece, the workpiece is heated for forming to a hot forming temperature and the workpiece is cooled after or during the forming.

Linvention concerne un procédé de détermination des changements de forme dune pièce en acier ou dun alliage dacier sous leffet dune déformation, qui consiste à appliquer une peinture laque sur la pièce, à déformer la pièce, puis à effectuer une analyse optique du changement de forme en mesurant la peinture laque appliquée. Lobjectif de linvention est un procédé de détermination des changements de forme dune pièce en acier ou dun alliage dacier qui convienne également pour lanalyse du changement de forme dune pièce après formage à chaud. A cette fin, une peinture laque présentant une teneur en AI supérieure à 30 % en poids est appliquée sur la pièce avant la déformation de la pièce ; la pièce est chauffée à une température de déformation thermique à manière à être déformée ; et la pièce est refroidie après ou pendant la déformation.

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