METHOD AND MEANS FOR ULTRASONIC IMPACT MACHINING OF SURFACES OF MACHINE COMPONENTS

摘要

A method for ultrasonic impact machining (UIM) of straight or curved surfaces using a tool (10) with a free rod- shaped indenter (26) to execute ultrasonic impacts by an action of the tool natural vibrations and ultrasonic transducer (12) resonance oscillations, with goals of strengthening a surface, increasing hardness, creating compressive stresses, and/or modifying surface structure based upon diminishing mosaic blocks up to an amorphous structure is disclosed. These physical effects result in at least one of increased abrasive damage resistance, increased contact injury resistance, increased corrosive damage resistance under stress, increased endurance, increased resistance to fatigue and dynamic fractures, creation of conditions for forming prescribed physical and mechanical properties in the surface. The method provides machining of external and internal faces of straight and curved shapes, and provides indenter axis orientation perpendicular to a workpiece surface at every point of mechanical trajectory of the tool.