|제목(국문)||표면처리 후 초고강도강 센터필러 프레스 금형의 효율적 보정기법|
|제목(영문)||An Effective Compensation Method of Press Tool Geometry for Stamping a Ultra High Strength Steel Center-pillar after Heat Treatment|
,대구대학교 대학원 기계공학과
곽종환 (K.J.H ,대구대학교 대학원 기계공학과 ) ▷공저자네트워크등록하기
김세호 (Seho Kim ,대구대학교 자동차ㆍ산업ㆍ기계공학부 ) ▷공저자네트워크등록하기
Changes in the accuracy of the geometrical shape after a surface treatment are often very large due to the variation of the deformation mechanisms such as edge draw-in and the variation in springback caused by the reduction in the coefficient of friction between the tool and the blank. In the present study, the resulting shape accuracy due to the changes in deformation is quantitatively examined in order to predict the variation and to remove any undesirable additional tool compensation for the center pillar member made from steel with a UTS of 980MPa. The study examines important process parameters that are closely related with the edge draw-in such as the blank holding force, the contact status between the tool and the blank and the friction coefficient. The proposed method is applied within the finite element analysis of the stamping process for tools after a surface treatment and the amount of edge draw-in and flush values are compared between the analysis and experiments. The results demonstrate that the proposed quantification and finite element scheme are applicable to complicated tool compensation procedures and compensation can be designed effectively.
|keyword||High Strength Steel, Tool Compensation, Surface Treatment, CAE, Springback