Forming a Single Plastic Imprint of the Indenter under Ultrasonic Surface Hardening

[摘要] The results of the experimental investigation of forming the geometry of a single imprint appearing on the machined surface during a single tool stroke in ultrasonic surface hardening are given. The equations of regression for calculating the geometrical parameters of the imprint depending on the machining modes such as the static force and the diameter of the deforming element are obtained. Unlike the existing models of forming the imprint, the appearance of the material pressed out around the tool during its penetration in the surface layer of the machined detail is taken into account. The pressed-out metal looks like a hill. The equations obtained allow us to determine the height of the hill as well as the depth and diameter of the imprint taking into consideration the hill dimension. The calculation of these parameters is necessary to find out the boundary conditions of starting the appearance of the plastic flow wave under ultrasonic plastic deforming of metals and alloys. These conditions determine the criterion of forming waviness and present the restrictions of the limiting values of feeding and speed in machining the cylindrical surfaces.

[发布机构] Novosibirsk State Technical University, Prospekt K. Marksa, 20, Novosibirsk; 630073, Russia^1

[效力级别] 机械制造

[关键词] Cylindrical surface;Experimental investigations;Limiting values;Machined surface;Metals and alloys;Static forces;Surface hardening;Surface layers