航空学报 > 2015, Vol. 36 Issue (8): 2798-2806   doi: 10.7527/S1000-6893.2015.0150

TC4钛合金薄壁带筋锥形环辗轧充填规律

郭良刚1, 杨合1, 邸伟佳1, 陈福龙2, 朱帅1   

  1. 1. 西北工业大学 凝固技术国家重点实验室, 西安 710072;
    2. 中航工业北京航空制造工程研究所, 北京 100024
  • 收稿日期:2015-04-10 修回日期:2015-05-14 出版日期:2015-08-15 发布日期:2015-05-28
  • 通讯作者: 杨合 男, 博士, 教授, 博士生导师, 长江学者, 国家杰出青年基金获得者, 万人计划领军人才。《航空学报》第八届编委。主要研究方向: 精确塑性成形先进理论与技术。Tel: 029-88495632 E-mail: yanghe@nwpu.edu.cn E-mail:yanghe@nwpu.edu.cn
  • 作者简介:郭良刚 男, 博士, 副教授, 硕士生导师。主要研究方向: 环件辗轧、挤压等精确塑性成形过程的理论与技术及其建模仿真优化。Tel: 029-88460212-807 E-mail: glgglg66@nwpu.edu.cn;邸伟佳 男, 硕士研究生。主要研究方向: 钛合金异形环件精确辗轧过程的数值模拟。E-mail: 907197517@qq.com
  • 基金资助:

    国家自然科学基金(51175427, 51135007); 金属挤压与锻造装备技术国家重点实验室(中国重型机械研究院有限公司)开放基金(2011MEFETKF_03); 材料成形与模具技术国家重点实验室开放基金(P2014-05); 高等学校学科创新引智计划(B08040)

Filling rules in thin-walled and ribbed conical ring rolling for TC4 titanium alloy

GUO Lianggang1, YANG He1, DI Weijia1, CHEN Fulong2, ZHU Shuai1   

  1. 1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;
    2. AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China
  • Received:2015-04-10 Revised:2015-05-14 Online:2015-08-15 Published:2015-05-28
  • Contact: 10.7527/S1000-6893.2015.0150 E-mail:yanghe@nwpu.edu.cn
  • Supported by:

    National Natural Science Foundation of China (51175427, 51135007); Fund of the State Key Laboratory of Metal Extrusion and Forging Equipment Technology (China National Heavy Machinery Research Institute Co.,Ltd.) (2011MEFETKF_03); Open Fund of the State Key Laboratory of Materials Processing and Die & Mould Technology (P2014-05); "111" Project (B08040).

摘要:

钛合金薄壁带筋锥形环件是航空航天关键基础构件,型槽充填不满、截面轮廓难以精确成形,是该复杂异形环件精密辗轧成形面临的瓶颈问题。本文分析了影响型槽充填行为的关键影响因素,即决定塑性变形行为的每转进给量、以及决定每转进给量在环件内外表面分配比例的驱动辊半径和芯辊半径;以某TC4钛合金薄壁带外筋锥形环辗轧为研究对象,通过ABAQUS的VUAMP子程序开发,建立了实现以常每转进给量进给的芯辊运动闭环控制有限元仿真模型;进而模拟揭示了每转进给量、驱动辊半径和芯辊半径对型槽充填质量(充填率、型槽入口变形及其均匀性)的影响规律。结果表明:随着每转进给量增大,充填率先增大后减小,表明存在一个最佳的每转进给量最利于充填;随着每转进给量增大,型槽入口区域变形越小且分布越均匀,可有效抑制该区域产生裂纹缺陷;随着驱动辊半径增大,充填率逐渐减小,不利于型槽充填;随着芯辊半径增大,充填率逐渐增大,有利于型槽充填。

关键词: 钛合金, 薄壁带筋锥形环件, 充填规律, 每转进给量, 轧辊尺寸, 有限元建模仿真

Abstract:

The thin-walled and ribbed conical ring is one of the key underlying components widely used in aerospace industry. Being difficult to precision forming of cross-section of ring due to lack filling of groove profile is the bottleneck problem for this complex profiled ring rolling process. In this work, the key factors influencing the filling behavior, namely the feed amount per revolution, the radii of the main roll and idle roll are discussed. And taking a thin-walled and ribbed conical ring rolling process for TC4 titanium alloy as object, An FE model achieving close-loop control of idle roll with constant feed amount per revolution is established using VUAMP subroutine under ABAQUS environment. Then the influence rules of the feed amount per revolution and the radii of the main roll and idle roll on the filling quality, described by filling ratio and deformation and its uniformity at entrance of the groove profile, are disclosed by comprehensive simulations. The results show that: the filling ratio first increases and then decreases with the increase of feed amount per revolution, indicating that there is an optimum feed amount per revolution best beneficial to filling the groove profile; the deformation at the entrance of the groove profile is small and its distribution is uniform thus beneficial to avoiding the crack defect of that region with increasing feed amount per revolution; it is beneficial to filling the groove profile when decreasing the main roll's radius or increasing the idle roll's radius.

Key words: titanium alloys, thin-walled and ribbed conical ring part, filling rules of groove profile, feed amount per revolution, roll size, FE modeling and simulation

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