The Effect of the Tool Dimensions on the Formability of High Strength Steel

Abstract

In this paper, the influence of the toolset size on the formability of the high strength steel formability was analyzed. The formability indexes include the thinning rate and springback. The toolset size analyzed in this study includes die corner size and punch corner size. To analyze the above relationship efficiently, the test design and the FE simulation were employed. At the same time, the optimization method was also used. The response surface method can be used to show the effect of the tool size on the formability clearly. It can be seen from the results that the springback increases with the increase of the radius of the toolset punch corner. And the effect of the radius of the toolset die corner shows slight effect on the springback. The radius of the toolset punch corner is more sensitive for the springback than the radius of the toolset die corner. The thinning increases with the decrease of the radius of the toolset punch corner. And the effect of the radius of the toolset die corner shows slight effect on the thinning, the thinning increases with the increase of the radius of the toolset die corner. In terms of the thinning, the punch corner is more sensitive than the die corner, especially when the radius of the toolset die corner is high.