Deformation behavior of curved shells in multi-point forming with asymmetric punches

In order to solve the folded problem in multi-point forming with symmetric punches (SMPF), a new process of multi-point forming with asymmetric punches (AMPF) is proposed in this paper. Experiment and numerical simulation were both used to elaborately analyze the problem of fold. The deformation beh...

Full description

Saved in:
Bibliographic Details
Published in:International journal of advanced manufacturing technology 2017-12, Vol.93 (9-12), p.3981-3990
Main Authors: Jia, Binbin, Wang, Weiwei
Format: Article
Language:English
Subjects:
Asymmetry
CAE) and Design
Computer simulation
Computer-Aided Engineering (CAD
Cylindrical errors
Deformation
Deformation mechanisms
Engineering
Forming
Industrial and Production Engineering
Mechanical Engineering
Media Management
Metal forming
Metal sheets
Original Article
Punches
Strain distribution
Stress concentration
Surface properties
Variations
Workpieces
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to solve the folded problem in multi-point forming with symmetric punches (SMPF), a new process of multi-point forming with asymmetric punches (AMPF) is proposed in this paper. Experiment and numerical simulation were both used to elaborately analyze the problem of fold. The deformation behaviors of cylindrical surface, spherical surface, and sail surface in two processes were investigated. The characteristics of shape precision of the sheet metal were obtained under different forming parameters. Then, the stress and strain distribution of the cylindrical surface is obtained by numerical simulations. Finally, the mechanisms of folded generation and suppression were revealed by process analysis. It is shown that the surface quality and the forming precision of the workpiece formed by AMPF are improved by AMPF. Besides, the stress fluctuation during the forming process is obviously reduced and the uniformity of stress and strain after forming is enhanced. In addition, under the same loading condition, the average shape error of the cylindrical surface decreases by 17.6%, the stress extremum difference decreases by 5.7%, and the strain extremum difference decreases by 4.3%. The above research indicates that AMPF has a good application prospect in sheet metal forming.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-017-0825-9