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CSME 2020/12
Volume 41 No.6
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745-753
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Effect Study and Better Combination of Process Parameters for Tube Forming by a New Processing Technique of Bending and Hydroforming
Shen-Yung Lina and Jhih-Cheng Shiha
aDepartment of Mechanical and Computer-Aided Engineering, National Formosa University, Yunlin, Taiwan 632301, ROC.
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Abstract:
This work presents a new forming processing technique for tubular forming which the bending and hydroforming bulging are completed subsequently by a die set. The FEM is applied to simulate the entire forming processes for producing a bending and bulging tube. The effects of such process parameters as bending angle, bending radius, bending velocity, punch velocity and internal pressure on distributions of wall thickness, effective stress, effective strain and formability of the tube are investigated. Furthermore, the orthogonal array and factor response in the Taguchi method are applied together to determine the optimal process conditions. Because possible forming defects are not considered as a constraint when determining the optimal process conditions, analysis of variance for factor contribution is applied to adjust the obtained optimal process conditions. A better process condition is thus ascertained such that the finished tube is free of forming defects and has a thicker tube wall thickness.
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Keywords: subsequent technique, bending, hydroforming bulging, Taguchi method.
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©
2020
CSME , ISSN 0257-9731
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