液体全钽电容器外壳拉深关键技术及传递模设计

纯钽板通过深拉深制成的液体全钽电容器外壳在国内一直不能满足质量要求，主要原因是由于钽板在深拉深时极易产生粘结瘤。本文通过板料拉深时粘结瘤形成原因的分析，论述了模具材料、模具表面质量、板料表面质量及润滑等条件对钽板在拉深过程中形成粘结瘤的影响，指出选用高速钢做模具材料并对模具表面进行氧氮处理和采用以氟氯油为基础油的润滑油进行润滑可有效地解决粘结瘤的产生，并通过实验验证了解决方案。最后设计了一副传递模将实验结果应用于指导实际生产并获得成功。

Study of drawing key techniques and design of transfer die for shell of wet all-tantalum capacitor

Shells of wet tantalum capacitor by deep drawing have been unable to meet quality requirements because the seizing tumour appears easily during deep drawing.This paper analyzed the causes of forming seizing tumour,set forth the influence of mould material,mold surface quality,sheet metal surface quality and lubrication,etc.,pointed out that using high-speed steel as the mould material,dealing the surface of the die with oxygen and nitrogen and lubricating with lubricants based on CFC oil,the seizing tumour ...