预应力碳纤维缠绕制造重型压机机架的强度分析

Strength analysis of heavy press frame made by prestressed carbon fiber winding

对预应力碳纤维缠绕制造重型压机机架进行了研究,选用碳纤维(T700SC-12000)和钛合金(TC11)框架作为预应力结构的部件,把全新的材料应用到了25 MN模锻压机机架主要部件的设计中,进行了碳纤维缠绕机架的结构设计,依据输入的设计参数,建立了压机机架的模型,同时也对25 MN模锻压机进行了A型变张力缠绕设计,并对设计之后的结构进行了有限元分析。结果表明,应用预应力碳纤维缠绕技术极大地提高了预紧力对重型压机的梁和柱的保护,增加了零件的可靠性,并降低了大型零部件的制造风险,预应力碳纤维缠绕制造的重型压机机架强度设计满足要求,机架在预紧状态下的等效应力为863.9 MPa,小于钛合金TC11的屈服强度,而且减重效果明显,压机机架的质量从8 022kg下降到了1 950.76kg,下降了75.7%。

Heavy press frame made by prestressed carbon fiber winding was studied Carbon fiber（T700SC-12000）and titanium alloy（TC11）frame were selected as prestressed parts,New materials were applied to main parts of25 MN die forging press and carbon fiber winding frame structure was designed.Press frame model was established according to the input parameters.Meantime,A variable tension winding was designed for the 25 MN die forging press and the results using the finite element were analyzed.The analysis results show that prestressed carbon fiber winding technology greatly improves the pre-tightening force of the protection of the beam and column of heavy press,and increases the reliability of the parts,reduces the manufacturing risk of large parts.The strength of heavy press frame made by prestressed carbon fiber winding meet the requirements,the Von Mises of the prestressed frame is 863.9 MPa and less than the yield strength of TC11.The mass loss effect is obvious,mass of press frame is decreased from 8 022 kg to 1 950.76 kg,decreased by 75.7%.