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ÖÐÎĵķ½³Ì¶ªÁË£¬ÔÙ·¢Ò»´Î Ñо¿±íÃ÷£ºÈÛÌåÔÚ»¬ÒÆ¶ÎµÄÆ½¾ùÍ£Áôʱ¼äÓë²ÄÁÏËɳÚʱ¼äÖ®±ÈÓë¼·³öÕÍ´ó±ÈÖ®¼ä´æÔÚÖ¸ÊýË¥¼õ¹ØÏµ£¬ÆäÊýѧ¹ØÏµ¿ÉÓ÷½³Ì B=1+Ae-t/r £¨A¡Ö0.2~0.8£©±íʾ£¬ÆäʵÖÊÊÇÈÛÌåÔÚ»¬Òƶδ¦ÓÚÐαäË¥¼õ¹ý³Ì¡£ÀíÂÛ·ÖÎöÓëÊýֵģÄâ¾ßÓи߶ȵÄÒ»ÖÂÐÔºÏÀíÐÔ£¬¿ÉÓÃÓÚÖ¸µ¼Æø¸¨¿ÚÄ£Éè¼Æ¡£ [ Last edited by xjh2672 on 2008-2-17 at 13:42 ] |
2Â¥2008-02-17 13:33:58
knightstar
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| According to the research ,the residence time of melt in its slipping section has a relation of exponential decay with its relaxation time ratio and extrusion swell ratio.Its mathematical relation can be expressed by this equation B=1+Ae-t/r£¨A¡Ö0.2~0.8£©.In fact ,melt in the slipping section is in the process of deformation decay.Theoretical analysis and numerical simulation match well,so the equation can be used as a guidence in the design of gas-assisted dies |

3Â¥2008-02-19 14:56:17














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