Get access

Springback Theory of Plane Bending and the Progress of Study on Its Engineering Application

Authors

  • Jun Zhao,

    Corresponding author
    1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qin Huangdao, Hebei, China
    Search for more papers by this author
  • Ruixue Zhai,

    1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qin Huangdao, Hebei, China
    Search for more papers by this author
  • Rui Ma,

    1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qin Huangdao, Hebei, China
    Search for more papers by this author
  • Peipei Zhan,

    1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qin Huangdao, Hebei, China
    Search for more papers by this author
  • Xiaokang Song

    1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qin Huangdao, Hebei, China
    Search for more papers by this author

Abstract

With the rapid development of science and technology as well as increasingly fierce competition in product manufacturing, the accurate prediction, and precise control of bending springback have been the key issue to solve. Springback is the most common metal forming phenomenon. In the past few decades, a lot of research work was concentrated in the plane pure bending of straight beam. This paper made the plane curved beam with any cross-section as studying object, carried out a systematic theoretical study based on the unloading law of classical elastic–plastic theory and the characteristic of strain superposition. The theoretical derivation was built on basic assumptions which are widely applicable. The plane bending geometric constraint equation and the springback equation were established. The springback theory of plane bending was built. The springback theory was used to these techniques as expanding roundness setting, compression roundness setting, over-bending roundness setting, large pipe straightening, and profile stretch-bending. The analytic results and the results obtained by computer numerical simulations and physical experiments agreed well. The theory not only further enriches the content of the classical theory of elastic–plastic bending, but also provides a theoretical basis and technical support for the springback prediction in engineering problems.

Ancillary