吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1190-1196.doi: 10.13229/j.cnki.jdxbgxb201604026

• Orginal Article • Previous Articles     Next Articles

Influence factors of profile deformation in NC stretch bending

GU Zheng-wei, LYU Meng-meng, LI Xin, XU Hong   

  1. College of Materials Science and Engineering, Jilin University,Changchun 130022,China
  • Received:2015-12-27 Online:2016-07-20 Published:2016-07-20

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Abstract: Based on the NC stretch bending of a double curvatures beam of a railway vehicle, the formulae to calculate the profile deformation according to NC codes were developed. The variation trend and the influence factors of the elongation and rotation angle of the profile in NC stretch bending were analyzed. Besides, by importing the real deformation data into the numerical simulation model, the crack defect due to unreasonable elongation was analyzed and the corresponding tests were carried out. Results show that in NC stretch bending, the total elongation of the profile is significantly smaller than that of the tensile cylinder provided by the NC code, and the total rotation angle of the profile is larger than that of the arm. The position of the sliding block has a significant influence on the NC stretch bending of profile. The profile length, jig depth and pre-elongation do not affect the profile elongation in the wrap-stretching stage, but influence the elongation ratio.

Key words: materials synthesis and processing technology, stretch bending, NC code, profile deformation

CLC Number: 

  • TG306
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