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Abstract：
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Inner-hole burring form process is a common procedure in forming process and the distortion feature in strain zones is also a physical and geometry non- linear combination distortion process.The stress,strain and the mold force are analyzed by using the main stress method and the stress strain change rule along with the die angle of the inside hole flange forming area is obtained.Using concrete calculated example,the stress,strain and the mold stress are simulated with ADINA software.It is shown that the simulation results of the stress strain change rule along with the die angle are in good accordance with that of the main stress method.The material is becoming thinner and contracts in radius direction with burring,the bigger the die angle,the larger the strain of the hole edge and the force on die are.
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Funds：
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河南省教育厅科技攻关项目(20011046)
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AuthorIntro：
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Reference：
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