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Abstract：
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In explicit finite element analysis of cold ring rolling process,hourglass was easily aroused by one point load because of violent vibration and small contact area between rollers and ring.Combined hourglass control method was adopted to control the hourglass effectively.The cold rolling process of the ring with rectangular section was simula- ted.The ratio of hourglass energy to internal energy with combined method was reduced from 15% with damping method to 2.5%.The weight factor of artificial stiffness hourglass resistance was 0.8.The artificial damping hour- glass control coefficient was set to 0.1,and the artificial damping hourglass control coefficient was set to 0.001.Com- pared with the experiment of axial broadening,the result shows that the axial edge flatness(0.114)predicted with combined method is close to the experiment result(0.112).
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Funds：
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国家自然科学基金重点项目(50335060)
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AuthorIntro：
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Reference：
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