模具对Nb Ti/Cu超导线集束拉拔芯丝畸变的影响

Influence of Die on Distortion of Core Wires in NbTi/Cu Superconducting Wire during Bundle-drawing

摘要:

使用有限元软件平台ABAQUS对NbTi/Cu多芯复合超导线集束拉拔过程进行数值模拟,研究了拉拔模具参数对芯丝畸变程度的影响。通过引入畸变因子进行量化分析,获得了集束拉拔过程中芯丝畸变极小值所对应的参数区间。结果表明:工作锥半角为6°～8°,定径带长度4.5～5.5 mm,道次加工率为20%～25%时,NbTi/Cu多芯复合超导线芯丝畸变存在极小值。

Abstract:

The finite element software platform ABAQUS was used to simulate the bundling and drawing process of NbTi/Cu multi-filamentary superconducting wires. The influence of drawing die parameters on the degree of core wire distortion was studied. The distortion factor is introduced to quantify the distortion of core wires,and the parameter interval corresponding to the minimum value of core wire distortion in the bundling and drawing process of NbTi/Cu multi-filamentary superconducting wires was obtained. The results show that when the semi-angle of drawing dies is6°～ 8°,the bearing length is 4. 5 ～ 5. 5 mm,and the processing rate is 20% ～ 25%,the core wire distortion of Nb Ti/Cu multi-filamentary superconducting wires has a minimum value.