Patent ID: 6817219
Filing Date: 2004-11-16
Classification: B21C,B21D,B21H,Y10T

Abstract:
Flow-forming method, comprising:placing a blank on a rolling mandrel of a flow-forming machine; rotating the blank relative to at least one flow-forming roll; infeeding the at least one flow-fanning roll relative to the blank; and lengthening the blank axially by the flow-forming roll and flow-formed to a workpiece, wherein for compensating dimensional variations of the blank at least one compensating area is worked into the workpiece; at least one of before and during flow-forming a measuring device determines geometrical data of at least one of the blank and the workpiece; for obtaining a desired final geometry of the workpiece, geometrical parameters of the at least one compensating area are individually calculated as a function of the determined geometrical data; and by a control device the infeeding of the flow-forming roll is controlled in accordance with the calculated geometrical parameters of the at least one compensating area, so that a workpiece with a desired final geometry can be formed independently of dimensional variations of the blank.