| 1 | Experimental investigation of friction coefficient in tube hydroforming显示文摘The friction coefficient between tube and die in guide zone of tube hydroforming was obtained. In hydroforming, the tube is expanded by an internal pressure against the tool wall. By pushing the tube through tool, a friction force at the contact surface between the tube and the tool occurs. In guiding zone, the friction coefficients between tube and die can be estimated from the measured axial feeding forces. In expansion zone, the friction coefficients between tube and die can be evaluated from the measured geometries of expanded tubes and FE analysis. | Hyae Kyung YI Hong Sup YIM Gun Yeop LEE Sung Mun LEE Gi Suk CHUNG Young-Hoon MOON | 2011 | Transactions of Nonferrous Metals Society of China2011，21，A01： | 5 |
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