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针对重型机械中超大超重型件的制造、加工、运输、和装配难的问题,提出了预应力坎合连接的方法。指出了预应力坎合连接与普通机加工表面自然摩擦以及机械键合的区别,并从仿生学和接触力学的角度分析了多峰坎合连接的原理。通过预应力可使坎合处理后的剖分子件形成具有承载能力的整体件,基于此原理提出了3种预应力坎合连接的工程应用方法。坎合因数的测量实验表明,在预应力场的作用下,界面的坎合处理可以有效提高结构抗错移能力。通过350 M N模锻液压机模型实验,发现预应力坎合连接结构的抗错能力能够很好地满足模锻液压机的力学要求。该文还介绍了目前预应力坎合连接在重型压机中的实际应用。
Aimed at the problems of manufacture, processing, transportation and assembly of super heavy parts in heavy machinery, a method of prestressing and clamping connection was put forward. The difference between natural friction and mechanical bonding between prestressed ridge joint and normal machined surface is pointed out. The principle of multi-ridge ridge joint is analyzed from the view of bionics and contact mechanics. Based on this principle, three kinds of engineering methods of prestressed snap-in connection are put forward. The test of fit-in factor shows that under the action of pre-stress field, the interfacial interference treatment can effectively improve the anti-migration ability of the structure. Through the 350 M N die forging hydraulic press model experiment, it is found that the anti-erroneous ability of prestressed fit joint can well meet the mechanical requirements of die forging hydraulic press. The article also introduces the practical application of the prestressed konchak connection in the heavy press.