针对难成形材料微构件成形困难的特点,提出基于激光双面加热的微塑性成形方法。采用有限元分析软件ABAQUS,建立了基于激光加热的微镦粗圆柱形工件的热力耦合有限元模型,并对激光加热后工件的温度场分布和微塑性成形进行了模拟和应力分析。结果表明,采用激光双面加热的方法可以为微塑性成形建立合适的温度场,激光加热状态下的微塑性成形力明显降低,提高了微塑性材料的成形性能,拓宽了微塑性成形技术的应用范围。

To solve the forming difficulty in the microforming microparts made of hard-to-deform material, a novel approach about micro plastic forming based on laser-assisted double-sided heating method has been presented. Numerical simulations are completed and analyzed using a finite element method (FEM) softwave, ABAQUS to study the temperature field distributions and the stress distributions of the billet and the effect of laser-assisted heating on the characteristics of microforming. Accordingly, the coupled thermo-mechanical finite element model of cylinder billet is developed.The results show that an appropriate temperature field for microforming can be established using the laser-heating method, resulting in the decrease of microforming force and the improvement of formability of microforming material. The novel method will extend the applications of microforming.