摘要
目的针对企业模具寿命短、资源浪费、生产成本上升的问题,建立模具表面激光熔凝抗裂仿生单元体模型。方法在研究了植物叶片抗开裂生物原型结构的基础上,提炼针对模具的抗裂要素,形成单体模型,与实际影响模具循环寿命的因素相结合,分析寿命影响因素,然后基于获取到的数学模型构型,对激光熔凝单元体参数进行正交试验设计与优化。结果通过优化单元体的微观组织结构分析,在模具易出现疲劳裂纹位置,进行激光局部熔凝仿生抗开裂单元体制备,熔凝抗开裂单元体起到良好模具裂纹阻断作用,提高模具使用寿命50%以上。结论为提高模具寿命提供了一种新的方法。
The paper aims to put forward a welding process of laser melting bionic body（LMBB） on mould surface in allusion to problems such as short life of mould, waste of resources and rising cost of production. Based on the blocking cracks biological prototypes of the plant leaves, the mathematical model of the LMBB on mould surface was established with respect to the mould crack resistance. The life of the LMBB was estimated. Combined with the mathematical model of laser bionic strengthening body, parameter optimization and orthogonal experiment of LMBB were done. Through analysis of the LMBB microstructure, the LMBB was melted on mould surface where it is easy to generate cracks. LMBB could block cracks on mould surface and improve the mould life by over 50%. The above results provide a new process for improving mould life.
作者
丁建岗
DING Jian-gang(Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)
出处
《精密成形工程》
2018年第4期156-162,共7页
Journal of Netshape Forming Engineering
