Experimental research of incremental sheet forming based on fastened pre-tensioning

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• 作者：G. C. Zha ; X. F. Shi ; W. Zhao ; L. Gao…
• 关键词：Fastened pre ; tensioning ; Incremental sheet forming ; Springback ; Thickness analysis
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：82
• 期：1-4
• 页码：711-717
• 全文大小：1,407 KB
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• 作者单位：G. C. Zha (1) (2) (3)
  X. F. Shi (2) (3)
  W. Zhao (2) (3)
  L. Gao (1)
  M. L. Wu (2) (3)
  
  1. Institute of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
  2. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing, 211167, China
  3. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, 211167, China
  
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

Fastened pre-tensioning is conducted on sheet metal prior to incremental forming, thus causing pre-plastic deformation of the sheet metal. To accomplish this process, a 1060H24 aluminum sheet is selected as material, a prosthesis with typical external features as object, and the NHSK1060 incremental sheet forming machine as experimental equipment. By analyzing the forming parts and comparing with conventional incremental sheet forming techniques, fastened pre-tensioning can efficiently improve the springback of incremental forming. Influenced by frictional stress τr, the strain gradually augments with distance from the center. The strain reaches maximum levels around the annular region, which is the pre-tensioning contact area edge of the sheet metal and the support body. The thickness distribution of sheet metal follows cosine law, with fastened pre-tensioning influencing its thickness. Keywords Fastened pre-tensioning Incremental sheet forming Springback Thickness analysis