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为了研究精冲过程中剪切区温升对模具的影响,设计制造了一副能够安装热电偶以测量精冲过程中模具温度变化的精冲模具,并对4种不同材质板料在实时连续冲裁过程中的模具温度变化进行测量实验。采用基于热力耦合的有限元方法对连续精冲过程的温度变化进行模拟研究,模拟结果显示,精冲塑性好的板料模具温升较小;材料强度越高,料厚越厚,模具温升越大;待测点处温度都是前几次冲压过程快速升高,然后达到稳定状态,这与实际测量结果吻合。该有限元方法能有效预测精冲工艺温度场。
In order to study the impact of shear zone temperature rise on the mold in the fine blanking process, a fine blanking die that can be installed thermocouple to measure the mold temperature changes in the fine blanking process was designed and manufactured. Four kinds of blanks Blanking process of mold temperature changes in the measurement experiment. The finite element method based on thermodynamic coupling is used to simulate the temperature change of continuous fine blanking process. The simulation results show that the temperature rise of blanking sheet metal mold is small. The higher the material strength, the thicker the material thickness, The greater the temperature at the point to be measured is the rapid increase in the previous several stamping processes, and then reach a steady state, which is consistent with the actual measurement results. The finite element method can predict the temperature field of fine blanking process effectively.