芯轴螺纹升角对钛合金内螺纹管挤压变形均匀性的影响研究  

Effect of Mandrel Thread Lift Angle on Extrusion Deformation Uniformity of Titanium Alloy Internal Thread Pipe

作　　者：张征浩 黄东男[1,2] 杜赵新 李旭东[1] 熊振 ZHANG Zheng-hao;HUANG Dong-nan;DU Zhao-xin;LI Xu-dong;XIONG Zhen(School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Aluminum Corporation of China Limited,Beijing 102200,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051 [2]中铝材料应用研究院有限公司,北京102200

出　　处：《精密成形工程》2022年第8期28-34,共7页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(5186050063)。

摘　　要：目的为了促进金属周向的流动、提高金属的流动均匀性以及钛合金内螺纹管的成形质量,确定合适的螺纹升角大小。方法通过数值模拟技术对内螺纹芯轴的螺纹升角在10°~40°范围内进行适当调整,并用相对均差值衡量挤压稳态内螺纹管的流动均匀性,探究螺纹升角的变化对内螺纹管成形的影响。结果适当增大螺纹升角至30°,可以促进金属周向的流动,提高金属流动均匀性。结论当内螺纹芯轴螺纹升角为30°时,金属流动更为均匀。对优化后的内螺纹芯轴进行挤压试验,获得了成形质量良好的TA1钛合金内螺纹管。The work aims to determine the appropriate thread lift angle,so as to promote the circumferential flow of metal and improve the uniformity of metal flow and the forming quality of titanium alloy internal thread pipe.Numerical simulation technology was used to adjust the thread lift angle of internal thread mandrel in the range of 10°-40°,and the flow uniformity of the internal thread pipe at extruded steady-state was measured by the relative difference in speed.Then,the effect of thread lift angle on forming quality of internal thread pipe was investigated.As a result,when the thread lift angle was appropriately increased to 30°,the circumferential flow of the metal was increased,and the uniformity of the metal flow was improved.When the thread lift angle of internal thread mandrel is increased to 30°,the flow of metal is more uniform.Through the extrusion test on the optimized internal thread mandrel,TA1 titanium alloy internal thread pipe with good forming quality is obtained.

关 键 词：钛合金内螺纹管 螺纹升角 相对均差值 变形均匀性 

分 类 号：TG379[金属学及工艺—金属压力加工]