Patent ID: 8020418
Filing Date: 2011-09-20
Classification: B21D,G05B

Abstract:
1. A device for press-forming at least one portion of a material according to at least one predetermined condition, comprising: at least one arrangement of: a state variable detector configured to measure a state variable comprising a metal mold distortion amount, or the state variable and at least one of state variables comprising a punch reaction, a metal mold temperature, a work piece deformation amount or a work piece temperature during the formation of the at least one portion of the material; a processing condition computer arrangement configured to determine from a first moment to a second moment at least one particular processing condition from at least one of a forming speed of the at least one portion of the material, a blank holding force or a metal mold temperature as a function of at least two of the at least one first characteristic, the at least one second characteristic or the at least one of the state variables, wherein the determination is performed using (i) a first influence function matrix for indicating a relation between a material characteristic of the material and a correction amount of the at least one particular processing condition, and (ii) a second influence function matrix for indicating a relation between the state variable and the correction amount of the at least one particular processing condition; and a processing condition controller configured to: (i) control the at least one processing condition from processing conditions comprising at least one of a punch movement speed, a die movement speed, a metal mold temperature or a blank holding force based on the at least one processing condition, (ii) correct an initialization value C 0 ( i ) of the at least one processing condition using: where T 1 ( i,j ) is an influence function matrix which indicates a relation between a deviation of the material characteristic of a material from a reference value thereof and an amount of correction of the at least one processing condition, where P(j) are material characteristic values, where P 0 ( j ) are reference values for respective material characteristics, where L is a number of processing condition set values, and where M is a number of the material characteristic values, and (iii) correct the at least one processing condition using: where C(i) (i=1-L) are correction values for respective processing conditions, where T 2 ( i,k ) (i=1-L, k=1-N) is an influence function matrix which indicates a relation between a deviation of a measured state variable to a reference value and a correction amount of the at least one processing condition, where S(k) (k=1-N) is the state variable, where S 0 ( k ) (k=1-N) is a reference state variable, and where N is a number of the state variable.