Physical and numerical modeling of hot closed-die forging to reduce forging load and die wear

초록

A hot closed-die forging process is analyzed by physical modeling and by isothermal and non-isothermal numerical modeling with the finite-element method. The aim of the study is to obtain quantitative information regarding hot closed-die forging, especially in respect of the material flow, the die pressure, and the temperature. For the study of the flow, layered plasticine was used in physical modeling with a half-scale die set. For the numerical simulation, a thermoviscoplastic finite-element program has been developed. Pressure and temperature distributions are obtained at each stage. Also, the temperature changes in the workpiece and the dies per process cycle are simulated. It is expected that the information can be used in the design of preforming operations to reduce the forging load and to enhance the die-life. © 1994.

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