| 摘要 |
The invention relates to workpiece control shaping of metal, preferably in the form of plates or bands, which metal workpiece (1) has a high tensile limit, preferably above 1000 N/MM2 and is intended to be further shaped. Along predetermined folding notches or zones (2, 3) across the workpiece (1) the tensile limit of the material is reduced by heating to a tensile limit, which is substantially lower than that of adjacent base material, whereafter the workpiece (1) directly or when it has got cold is subjected to subsequent bending, folding- or shaping operations to provide a two- or three-dimensional shape/extension of the workpiece (1 along the treated folding notches or zones (2, 3).
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