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METHOD AND DEVICE FOR DEFORMING A WORKPIECE MADE OF A MATERIAL HAVING AN EXPONENTIAL TENSILE STRESS-STRAIN BEHAVIOR INTO A THIN-WALLED, HOLLOW SHELL
METHOD AND DEVICE FOR DEFORMING A WORKPIECE MADE OF A MATERIAL HAVING AN EXPONENTIAL TENSILE STRESS-STRAIN BEHAVIOR INTO A THIN-WALLED, HOLLOW SHELL
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机译：将具有指数拉伸应力-应变行为的材料制成的工件变形为薄壁空心壳的方法和装置
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摘要
The invention relates, among other things, to a method for deforming a workpiece (24SUB0/SUB) made of a material that has an exponential tensile stress-strain behavior into a thin-walled, hollow shell (24SUB3/SUB). According to said method, the circumference of the workpiece (24SUB0/SUB) is chucked and is actively rotated about the centerline (M) thereof. A freely rotatable pressing mold (4) which is provided with an exterior face (4a) that is molded according to the desired shape of the shell (24SUB3/SUB) is pressed against one side (24a) of the workpiece at an adequate pressure. At least one track-controlled pressing roller (14, 17) is pressed against the other side (24b) of the workpiece such that the rotating workpiece (24SUB0/SUB) is deformed into the shell exclusively by means of local compressive forces. The relative speed between the workpiece (24SUB0/SUB) and the at least one pressing roller (14, 17) as well as the force applied to the workpiece (24SUB0/SUB) by the at least one pressing roller (14, 17) and the pressing mold (4) are modulated in such a way that the compressive forces applied to the workpiece (24SUB0/SUB) lie below the tensile strength of the workpiece (24SUB0/SUB). The invention further relates to a device for carrying out said method. Also disclosed are a method and a device for deforming a workpiece made of a material that used to be deformable only at previously known hot-forming temperatures. According to the invention, said material can be deformed into a thin-walled, hollow shell already at a temperature lying below the hot-forming temperature previously known for the material of which the workpiece is made.
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