TB8钛合金直壁方形盒多道次渐进成形壁厚分布的试验研究  

Experimental Study on Wall Thickness Distribution in Multi-pass Incremental Forming of TB8 Titanium Alloy Vertical Walls Square Box

作　　者：朱知寿 史文祥 王辉[2] 王新南 李明兵 商国强 陈明和[2] ZHU Zhi-shou;SHI Wen-xiang;WANG Hui;WANG Xin-nan;LI Ming-bing;SHANG Guo-qiang;CHEN Ming-he(Key Laboratory of Advanced Titanium Alloys,Beijing Institute of Aeronautical Materials,Aero Engine Corporation of China,Beijing 100095,China;College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]北京航空材料研究院中国航空发动机集团先进钛合金重点实验室,北京100095 [2]南京航空航天大学机电学院,南京210016

出　　处：《精密成形工程》2022年第5期8-13,共6页Journal of Netshape Forming Engineering

基　　金：航发基金(HFZL2018CXY022)。

摘　　要：目的改善直壁方形盒制件在传统成形路径中厚度减薄严重的问题。方法采用一种上下交替往复成形轨迹的方法对TB8钛合金直壁方形盒进行试验研究,分析不同成形轨迹下制件壁厚的变化规律,测量直壁方形盒的最大减薄情况,并在此基础上讨论减薄程度与制件口部翘曲间的相关性。结果采用上下交替往复成形轨迹的方法能使制件壁厚减薄程度减轻、壁厚分布更加均匀且壁厚突破正弦定律,经测量制得的TB8钛合金直壁方形盒的最大减薄率为42.6%,比经自上而下成形轨迹的成形方法制得的TB8钛合金直壁方形盒的最大减薄率降低了23%,同时能有效减轻制件口部翘曲程度。结论上下交替往复成形轨迹的成形方法是改进传统自上而下成形方法制作直壁方形盒的有效途径。This paper is to improve the serious thickness reduction problem of vertical walls square box parts in the traditional forming path.A method of alternating up and down reciprocating forming trajectories was used to conduct experimental research on the TB8 titanium alloy vertical walls square box,the variation law of the wall thickness of the workpiece under different forming trajectories is analyzed,and the maximum thinning of the vertical walls square box is measured.On this basis,the correlation between the thickness reduction degree and the warpage of the workpiece mouth is discussed.The results show that the method of alternating up and down reciprocating forming trajectories can reduce the degree of thickness reduction of the wall thickness of the work piece,make the wall thickness distribution more uniform and the wall thickness break through the sine law of the wall thickness.The measured TB8 titanium alloy vertical walls square box has the largest thickness reduction rate of 42.6%,which is 23%lower than that of the TB8 titanium alloy vertical walls square box made by the method of up and down forming trajectories.At the same time,it can effectively reduce the warpage of the workpiece mouth.The method of alternating up and down reciprocating forming trajectories is an effective way to improve the traditional method of up and down forming trajectories to make vertical walls square boxes.

关 键 词：数控渐进成形 多道次成形 TB8钛合金 直壁方形盒 壁厚分布 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]