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Press-forming mold designing method and press-forming mold
Press-forming mold designing method and press-forming mold
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机译:压制成型模具的设计方法及压制成型模具
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摘要
A prediction equation “R0/t≧(2R/t+(2R/t+1)εf)/2(1−(1+2R/t)εf)” is derived which predicts that bendability-dominated fracture will not occur when the critical surface strain εcritical is not exceeded by a strain on the metal sheet surface causing the occurrence of ductility-dominated fracture that is obtained from the minimum curvature radius R0 of a press-forming mold and the critical strain εf in a plane strain region in a forming limit diagram. The minimum curvature radius R0 of a mold required to prevent the occurrence of bendability-dominated fracture is estimated, and the mold is designed with a curvature radius that is not less than the curvature radius R0.
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机译:预测方程“ R 0 Sub> / t≧(2R / t +(2R / t + 1)ε f Sub>)/ 2(1-(1 + 2R / t)ε得出 f Sub>)”的结论,即当金属薄板表面上的应变未超过临界表面应变ε critical Sub>时,将不会发生可弯曲性主导的断裂由压制成型模具的最小曲率半径R 0 Sub>和成形极限内的平面应变区域中的临界应变ε f Sub>获得的延性支配断裂图。估计防止发生可弯曲性占主导的断裂所需的模具的最小曲率半径R 0 Sub>,并且将模具设计为曲率半径不小于曲率半径R 0 Sub>。
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