Abstract
The article discusses the direction of improving the operational properties of machine parts by the cold plastic deformation. Purpose – to develop methods of experimental research of regular reliefs, including equipment, tools and material of prototypes; to create a classification of regular reliefs by purpose; to determine the mechanics of deepening of the linear indenter in the metal sample; to develop technological recommendations and research tools. The object of research – regular reliefs on the surface of machine parts. Methods and devices for conducting experiments were selected: hydrogenated presses, linear indentors, optical microscopes, microhardness testers, research materials, instruments and measuring instruments. The materials were alloy and stainless steel, gray and malleable cast iron, bronze and brass, aluminum and titanium alloys. The classification of reliefs by purpose, obtained by cold plastic deformation and cutting, has been developed. The mechanics of deepening of a linear indenter into a metal sample has been developed, which combines the values of the depth of indentation with the geometrical parameters of the indenter, friction coefficient, contact stress and groove depth. Experiments on 8 typical representatives of structural materials confirmed the theoretical principles of the mechanics of deepening. Scientific results allowed to develop and test a sample of the tool on a tubular part made of duralumin D16 (2117). The following process of improvement of operational properties of details of cars is offered: preparation of a surface under indentation; indenter deepening; removal of metal protrusions by cutting. KEYWORDS: REGULAR RELIEF, COLD PLASTIC DEFORMATION, LINEAR INDUCTOR, SURFACE OF PARTS, MECHANICS OF DEEPING
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