钛合金螺母浮动式精密温成形工艺研究

Research of precision warm-forming by floating-die for titanium alloy nut

试验性研究了钛合金自锁螺母的温镦成形工艺。首先通过分析自锁螺母的结构特点和材料特性,并用Deform模拟螺母的成形过程,同时针对螺母六角成形困难的问题,提出了用浮动凹模成形钛合金自锁螺母的技术。随后通过对比分析固定凹模,研究了浮动凹模在金属成形时的运动模型与摩擦力分布特点。最后通过试验生产对比验证了该工艺方案的可行性,同时分析研究了温镦成形时钛合金的金相组织及过热组织,实现了钛合金螺母的精密成形,不仅提高了生产效率,更节省了材料。

The warm upsetting for titanium alloy self-locking nut was experimentally researched. Aim to the question that the hexagonal edges of nut were difficult to form, through studying the structure and material and simulating the forming situation and loads with De- form, the technology of titanium alloy self-locking nut formed by floating-die was proposed. And then the motion model and friction distri- bution of floating-die were analyzed in the metal forming by comparative analyzing the fixed-die. Finally, it was contrasted and proved that the technology is feasible with the actual production, meanwhile the metallurgical structure and overheated structure of titanium alloy in warm precision-forming of hexagonal nuts were investigated. The precision forming of titanium alloy nut is realized, which improves the production efficiency and saves the material.