ПІДВИЩЕННЯ ЕКСПЛУАТАЦІЙНИХ ВЛАСТИВОСТЕЙ ДЕТАЛЕЙ МАШИН РЕЛЬЄФАМИ ПОВЕРХНІ

Abstract

The article discusses the direction of improving the operational properties of machine parts by applying regular reliefs to the surface/ Purpose - to develop a model, plan and methodology for experimental studies of regular reliefs and create their classification by purpose and methods of obtaining. The object of research - regular reliefs on the surface of machine parts. The hierarchy of the main factors that affect the profile of reliefs formed by triangular grooves is determined. This is the normal penetration force of a linear indenter, hardness and elongation of the experimental material. The optimization parameter is the groove depth. A mathematical model and research plan have been developed 23. The methodology and devices for conducting experiments are determined. These are hydraulic presses, linear indenters, optical microscopes, microhardness testers, test materials, instruments, and measuring instruments. Materials for research: alloyed and stainless steel, gray and malleable cast irons, bronze and brass, aluminum and titanium alloys. Classifications of reliefs according to the methods of obtaining and destination are developed. Production methods are based on cold plastic deformation and cutting. The basic methods for the study are static methods: the introduction of a dividing element with discrete drawing and a single protrusion of the shaped mandrel during reduction. The dependence of the depth and double angle of the relief groove on the normal force is shown. A new method for obtaining the surface of a part, including the alternation of supporting platforms and grooves is proposed. The method is carried out using machining and subsequent deformation pulling. A distinctive feature of the method is the use of an intermediate elastic sleeve. KEYWORDS: REGULAR RELIEF, COLD PLASTIC DEFORMATION, LINEAR INDUCTOR, SURFACE OF PARTS, COATING, MODEL OF FORMATION OF RELIEF.