薄壁不锈钢数码相机外壳液压成形工艺研究

数码相机外壳是形状复杂的非旋转体不规则结构薄壳形件,文章基于其工艺难点及形状特征分析,采用1Cr18Ni9Ti不锈钢板材进行了不同液压加载路径下的充液拉深成形实验,并结合有限元模拟,分析了液压加载与凸模运动的不同匹配关系对成形结果的影响;针对各种成形缺陷分析其产生原因,并确定了合适的成形工艺参数,模拟结果与实验吻合良好。在室温条件下,以1mm/s～2mm/s的凸模速度进行液压成形,在液压载荷最高为20MPa时,成功试制出表面质量好、结构精度高的薄壁不锈钢数码相机外壳。研究结果为复杂结构薄壳形件液压成形工艺参数的确定和优化设计奠定了基础,并为采用液压成形工艺生产和加工电子器件不锈钢外壳提供实验和理论依据。

Research on hydroforming of thin-walled stainless steel digital camera cover

The digital camera cover is a complicated thin-walled component.Based on its characteristic and the process analysis,hydroforming experiments under the different pressure loading paths were performed with 1Cr18Ni9Ti stainless steel sheets to determine the suitable process parameters.FEM simulations were also carried on to analyze the effect of the match between pressure loading and the action of the punch on the deformation and the causes of the defects appeared in the hydroforming process.The results of FEM simulation agreed well with those from experiments.At room temperature,with low velocity of the punch (1mm/s～2mm/s) and the maximum pressure of 20MPa,thin-walled stainless steel digital camera covers of high surface quality and dimensional accuracy can be formed successfully.The Investigations are helpful for the determination and optimization of process parameters in hydroforming the complicated thin-walled structure components.In addition,the results provide experimental and theoretical bases for applying the hydroforming process to producing stainless steel covers of electronic productions.