Abstract

By using the FEM, a method for the stress analysis of the presented dies has been proposed. In this method, FEM and Lame equation are used for the analysis of the die insert and the stress ring, respectively. The proposed method includes the calculation of the contact pressure between the die insert and the stress ring. To show the validity, the proposed method has been applied to the simple test problem. The results of the stress analysis have been compared with the results of ANSYS, a commercial FE-code. Cold extrusion has been simulated by using the rigid-plastic FEM and the results of the deformation analysis have been used as the input of the die structure analysis. The stress states of the prestressed extrusion die have been obtained. The stress analysis of the die insert with stress rings has also been performed during extrusion.

Keywords

• Prestressed Die;
• FEM;
• Lame Equation;
• Die insert;
• Stress Ring;
• Superposition Principle;
• Contact Pressure

• 예압된 금형;
• 유한요소법;
• Lame 식;
• 다이 인서트;
• 보강링;
• 중첩의 원리;
• 접촉압력;