Plastic Imprint Formation in the Process of Ultrasonic Surface Hardening

Abstract:

Experimental results of forming the geometry of a single imprint during the process of ultrasonic surface hardening are shown. A single imprint is formed on the machined surface as a result of interaction with an instrument vibrating at the ultrasonic frequency. Regression equations for calculating geometric parameters of an imprint depending on the machining conditions (static load and tool diameter) are derived. Contrary to the existing models the emergence of a hill formed around the tool in the process of its indentation into the surface layer of a workpiece is taken into account. The equations obtained make it possible to determine the height of this hill as well as the depth and diameter of the imprint with the hill. The calculation of these parameters is necessary to identify the boundary conditions of the beginning of initiation of a plastic flow wave in ultrasonic surface hardening of metallic materials.These conditions determine the criteria for the formation of waviness and represent restrictions on critical values of feed and speed in the machining of cylindrical surfaces.

• Periodical: Applied Mechanics and Materials (Volume 788)
• Pages: 82-87
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.788.82
• Online since: August 2015
• Authors: Yulia Kudryavtseva*, Anna Eryomina
• Keywords: Hill, Plastic Imprint, Ultrasonic Surface Hardening, Waviness

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