Analysis of the wall thickness distortion in tube hydro-forging

The tensile deformation is the most common forming principle in the sheet forming process, but there is a new tube forming process—tube hydro-forging has been developed based on the principle of compression deformation. In addition to the instability problem, a new surface defect—thickness distortio...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2023-04, Vol.125 (11-12), p.5771-5780
Main Authors: Chen, Gang, Chu, Guan-nan, Liu, Peixing, Gao, Jun
Format: Article
Language:English
Subjects:
Advanced manufacturing technologies
Bending moments
CAE) and Design
Compressive properties
Computer-Aided Engineering (CAD
Defects
Deformation
Deformation analysis
Deformation effects
Distortion
Engineering
Forging
Hydroforming
Industrial and Production Engineering
Low pressure
Mechanical Engineering
Media Management
Metal forming
Original Article
Strain
Surface defects
Surface stability
Tensile deformation
Thickness
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Summary:The tensile deformation is the most common forming principle in the sheet forming process, but there is a new tube forming process—tube hydro-forging has been developed based on the principle of compression deformation. In addition to the instability problem, a new surface defect—thickness distortion—was found in the compression deformation. In this paper, the wall thickness distortion is analyzed from the point of view of mechanics and deformation. It is revealed that in the low pressure tube hydroforming process, a bending moment exists and leads to some small wrinkles in the straight wall. In the tube hydro-forging, the small wrinkles would develop to the thickness distortion with the increase of compressive deformation. The wall thickness and compressive strain are two major effect factors. It is verified by experiments and simulation. This study helps to recognize the new surface phenomenon in compressive deformation.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-023-11057-1