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Blaha和Langenecker氏1955年证实,超声能改变锌晶体的塑性状态。在此之后,人们越来越重视研究超声对金属加工过程的影响。研究中发现,超声对金属具有两种效应,一种称为“体积效应”,即金属在超声作用下,晶粒中的内摩擦降低,使金属的变形能减小;另一种为“表面效应”,即一对物体在超声作用下,接触面的摩擦系数降低,使加工中工具与工件的摩擦功减小。纵观金属加工过程,发现各种加工方法无不包含着塑性变形和摩擦两个过程。因此可以想象,如能适当地利用超声,必能减小加工中的动力消耗,提高工具的使用寿命和改善加工质量。工艺试验证实了人们的这一
Blaha and Langenecker 1955 confirmed that ultrasound can change the plastic state of zinc crystals. Since then, people pay more and more attention to the study of the impact of ultrasound on the metal processing. The study found that ultrasound has two effects on the metal, one is called “volume effect”, that is, under the action of ultrasound, the internal friction of the metal is reduced and the deformation energy of the metal is reduced. The other is “surface Effect ”, that is, a pair of objects under the action of ultrasound, the friction coefficient of the contact surface is reduced, so that the friction between the tool and the workpiece is reduced. Throughout the metal processing, found that all kinds of processing methods all contain plastic deformation and friction of both processes. Therefore, it is conceivable that if the ultrasound is properly used, the power consumption in the process can be reduced, the service life of the tool and the quality of the process improved. Process tests confirmed this one