| LIU Xiao-jie,JIN Kang-ning,SHAN Bin,CHEN Ping.Numerical Simulation Analysis of Stress in Textured Stamping Die[J],48(8):9-15 |
| Numerical Simulation Analysis of Stress in Textured Stamping Die |
| Received:February 28, 2019 Revised:August 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.08.002 |
| KeyWord:numerical simulation surface micro-texture stamping die stress concentration friction coefficient |
| Author | Institution |
| LIU Xiao-jie |
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing , China |
| JIN Kang-ning |
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing , China |
| SHAN Bin |
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing , China |
| CHEN Ping |
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing , China |
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| Abstract: |
| The work aims to study the stress magnitude and distribution of textured dies in different shapes after stamping, and then provide guidance for improving the life of the die from the perspective of stress concentration of the textured die. A three-dimensional model of stamping die was set in the SolidWorks, and the triangular micro-texture, circular micro-texture and composite micro-texture of the die surface were simulated by setting triangle, circle and composite pattern in the fillet area of the dies. The mesh of textured stamping die was divided by HyperMesh, and the stamping process was established in ABAQUS for numerical simulation. Finally, the effect of surface micro-texture on the stress of stamping die was studied. The stress concentration appeared around the texture of the textured die, but the stress concentration mainly existed in a small range of the surface layer of the die and did not extend to the inside of the die. When the coefficient of friction was 0.1, the maximum stress of the composite textured die was 1520 MPa. Compared to the single triangular textured die, the maximum stress was reduced by 3.5%. Compared to the circular textured die, the maximum stress was increased by 13.6%. With the increase of the friction coefficient, the maximum stress of the textured die at the texture showed a tendency of decrease. The blank of triangular texture die and circular texture die with larger friction coefficient would break during stamping. At the same time, the relationship of the maximum stress of different textured dies was: triangular textured die > triangular and circular composite textured die > circular textured die. Therefore, surface texturing causes stress concentration at the texture of the die, and the textures in different shapes induce a different degree of stress concentration. When the texture is introduced on the die surface to improve the forming quality of the formed part, it is necessary to consider the problem that the stress concentration of the die due to the surface micro-texture affects the life of the die. |
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