Measurement of Shape Error for the Optimal Blank Design of Stamped Part with 3 Dimensional Contour Lines

다국어 초록 (Multilingual Abstract)

After a short review of iterative optimal blank method, a new method of measuring the shape error for stamped parts with 3D contour lines, is an essential component of the optimal blank design. When the contour line of the target shape does not exist in the plane, but exists in the 3D space, especially when the shape of the target contour line is very complicated as in the real automotive parts, the measurement of the shape error really matters. In the study, a method of shape error measurement based on the minimum distance is suggested as an evolution of the radius vector method. With the proposed method, the optimal blank shape of a real automotive part has been found in comparison with the results of the radius vector method. Through the investigation, the current method is found to resolve the problems of the radius vector method.

참고문헌 (Reference)

1 Engineering Technology Associates, Inc., "eta/DYNAFORM User’s Manual-Version 5.7.3"

2 Sowerby, R., "The Modelling of Sheet Metal Stampings" 28 (28): 415-430, 1986

3 Amirreza Yaghoobi, "Pressure Path Optimization of Hydrodynamic Deep Drawing of Cylindrical-Conical Parts" 한국정밀공학회 14 (14): 2095-2100, 2013

4 Son, K., "Optimal Blank Shape Design using the Initial Velocity of Boundary Nodes" 134 (134): 92-98, 2003

5 Shim, H. B., "Optimal Blank Design for the Drawings of Arbitrary Shapes by the Sensitivity Method" 123 (123): 468-475, 2001

6 Shim, H. B., "Digital Tryout based on the Optimal Blank Design Toward Realization of Beadless Stamping" 227 : 1514-1520, 2013

7 Shim, H. B., "Determination of Optimal Blank Shape by the Radius Vector of Boundary Nodes" 218 (218): 1099-1111, 2004

8 Ngoc-Trung Nguyen, "Design of High Strength Differential TWB to Enhance Drawability: FE Study and Optimization" 한국정밀공학회 15 (15): 2273-2283, 2014

9 Toh, C. H., "Deformation Analysis and Blank Design in Square Cup Drawing" 25 (25): 15-32, 1985

10 Lee, C. H., "Blank Design and Strain Prediction of Automobile Stamping Parts by an Inverse Finite Element Approach" 63 (63): 645-650, 1997

11 Kim, S., "Blank Design and Formability for Non-Circular Deep Drawing Processes by the Finite-Element Method" 75 (75): 94-99, 1998

12 Barlat, F., "Anisotropic Plastic Potentials for Polycrystals and Application to the Design of Optimum Blank Shapes in Sheet Forming" 25 (25): 1209-1216, 1994

13 Vogel, J. H., "An Analysis Method for Deep Drawing Process Design" 32 (32): 891-907, 1990