China Mechanical Engineering

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Springback Control and Compensation of Incremental Forming for Sheet Metal Parts with Open Geometric Feature

LI Ming1,3;DAI Peipei1,2;CHANG Zhidong1,2;CHEN Jun1,2,3   

  1. 1.National Engineering Research Center of Die & Mold CAD,Shanghai Jiao Tong University,Shanghai,200030
    2.Department of Plasticity Technology,Shanghai Jiao Tong University,Shanghai,200030
    3.Shanghai Research Institute of Tool and Die Technology(Co. Ltd.),Shanghai,200030
  • Online:2020-11-25 Published:2020-11-27

[成形质量的闭环与自适应控制技术]具有开放几何特征钣金件渐进成形的回弹控制与补偿

李铭1,3;代培培1,2;常志东1,2;陈军1,2,3   

  1. 1.上海交通大学模具CAD国家工程研究中心,上海,200030
    2.上海交通大学塑性成形技术与装备研究院,上海,200030
    3.上海模具技术研究所(有限公司),上海,200030
  • 基金资助:
    国家自然科学基金航天联合基金资助重点项目(U1737210);
    上海市优秀学术带头人项目(19XD1401900)

Abstract: The incremental forming of sheet metal parts with open geometric features was realized. The optimization of processing parameters, multi pass incremental forming and trajectory compensation were proposed to improve the geometric accuracy of sheet metal parts. The intermediate configuration of multi-pass incremental forming was designed to increase the plastic deformation and reduce the geometric deviation. In order to prevent the fracture during the first pass, the forming angle of the non fixed direction was set as 75° and the sheet metal in the non fixed direction was fully formed in the second pass. The geometric deviation of sheet metal parts with open geometric features may be controlled within 0.5 mm by using two-step incremental forming method based on geometric compensation.

Key words: incremental sheet forming, part with open geometric feature, processing parameter optimization, multi-pass incremental forming, geometric compensation

摘要: 实现了具有开放几何特征钣金件的渐进成形。提出采用工艺参数优化、多道次渐进成形和轨迹补偿等方法提高钣金件的几何精度。设计了多道次渐进成形方法的中间构型,目的在于增大材料塑性变形并减小几何偏差。采用层切法轮廓轨迹形成两道次成形中第一道次的构型,为了防止第一道次成形时出现破裂,将非固定方向的成形角度设定为75°,第二道次将非固定方向的板料完全成形。采用基于几何补偿的两道次渐进成形方法可以将开放几何特征钣金件的几何偏差控制在0.5 mm左右。

关键词: 板料渐进成形, 开放几何特征, 工艺参数优化, 多道次渐进成形, 几何补偿

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