• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (8): 90-96.doi: 10.3901/JME.2016.08.090

• 材料科学与工程 • 上一篇    下一篇

超大型空心钢锭翻转变形均匀性和压实效果研究

刘敏1, 2, 马庆贤1, 2, 刘功梅3   

  1. 1. 清华大学机械工程系 北京 100084;
    2. 清华大学先进成形制造教育部重点实验室 北京 100084;
    3. 中国长江三峡集团公司 成都 610041
  • 出版日期:2016-04-15 发布日期:2016-04-15
  • 作者简介:刘敏(通信作者),男,1988年出生,博士研究生。主要研究方向为大型空心钢锭锻造工艺及质量控制。E-mail:liumin881120@126.com;马庆贤,男,1964年出生,博士,教授,博士研究生导师。主要研究方向为大型锻件塑性成形模拟技术及质量控制。E-mail:maqxdme@mail.tsinghua.edu.cn
  • 基金资助:
    国家重点基础研究发展计划资助项目(973计划,2011CB012903)

Research on Rotatory Deformation Uniformity and Compaction Effect of Super-heavy Hollow Steel Ingot

LIU Min1, 2, MA Qingxian1, 2, LIU Gongmei3   

  1. 1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084;
    2. Key Laboratory for Advanced Materials Processing Technology of Ministry of Education,Tsinghua University, Beijing 100084;
    3. China Three Gorges Corporation, Chengdu 610041)
  • Online:2016-04-15 Published:2016-04-15

摘要: 20Mn5超大型空心钢锭在上平下V砧翻转芯轴拔长过程中采用普通V砧进行顺序翻转,锻件变形极不均匀且存在密集型疏松缺陷。通过DEFORM-3D数值模拟和理论推导,定量给出发散角和理论翻转角度与V砧角度和压下率的关系,提出不同压下率下的普通V砧翻转新工艺。数值模拟和物理试验结果表明,单砧压下时大圆角V砧和凸型V砧两种新型V砧的变形均匀性和压实效果均要优于普通V砧。翻转拔长模拟结果表明,不同压下率下凸型V砧、大圆角V砧和普通V砧翻转新工艺的变形均匀性和压实效果均要优于普通V砧顺序翻转,其中大圆角V砧翻转新工艺的变形均匀性最优,凸型V砧翻转新工艺的压实效果最优。研究结果可为国产大型筒体锻件空心钢锭锻造工艺规范的制定提供重要理论参考。

关键词: 变形均匀性, 翻转新工艺, 空心钢锭, 芯轴拔长, 压实效果

Abstract: Sequenced rotation with ordinary V-shaped anvil is used in the upper flat and lower V-shaped anvils mandrel drawing process of 20Mn5 super-heavy hollow steel ingot, but the forging deforms unevenly and contains intensive porosities. By numerical simulation using DEFORM-3D and theoretical derivation, the relationship between divergence angle, theoretical rotation angle, V-shaped anvil angle and reduction rate is given quantificationally, and the new rotation processes with ordinary V-shaped anvil at different reduction rates are proposed. Numerical simulation and physical experiment results show that the deformation uniformity and compaction effect of big fillet V-shaped anvil and convex V-shaped anvil is better than that of ordinary V-shaped anvil for single press. Simulation results of rotatory drawing show the deformation uniformity and compaction effect of new rotation processes with convex V-shaped anvil, big fillet V-shaped anvil and ordinary V-shaped anvil is better than that of sequenced rotation with ordinary V-shaped anvil at different reduction rates, while the deformation uniformity of the new rotation process with big fillet V-shaped anvil is best and the compaction effect of the new rotation process with convex V-shaped anvil is best. The results can provide important theoretical reference for establishment of hollow steel ingot forging process specification of national heavy cylinder forgings.

Key words: compaction effect, deformation uniformity, hollow steel ingot, mandrel drawing, new rotation process

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