The current paper is devoted to technological improvements in high-precision plasma cutting of thin sheets on processing the steel St3 + aluminum A5M bimetallic composition. The composition obtained by explosion welding presents a compound of various materials which differ in such thermophysical characteristics as their melting point and their thermal conductivity. The principal difference in their thermophysical properties has predetermined the specific features of forming the cut edge of this bimetallic composition. Out of the variety of technologies for cutting this bimetallic composition, the Hi-Focusplustechnology intended for carbon steel processing and the Hi-Focus technology for aluminum alloys are chosen. It is established that when cutting the bimetallic composition on the side of steel grade St3, the undercut filled with the products of melted steel grade St3 is formed on the aluminum portion in using both technologies. Switching the direction of the cut from steel to aluminum results in forming a taper on the aluminum portion. In so doing, high precision and superior quality of cutting on the steel grade St3 portion are provided.

Electro-physical characteristics of MIS structures with HgTe-based single quantum wells S Dzyadukh, S Nesmelov, A Voitsekhovskii et al. Abstract. Developing the effective technologies of detail machining greatly depends on understanding the processes laid down in their basis. The technological methods based on electro-physical processes are considered to be attractive. These are the methods of surface plastic deforming which use the energy of ultrasonic oscillations. The peculiarities of these methods are characterized by high intensity and impulse character of the ultrasonic action. The paper presents the results of mathematical modeling of deformation processes under the impact of the ultrasonic tool on the surface layer of metals and alloys. The theoretical approach to studying the process of ultrasonic deforming allowed us to determine the mode parameters of impact and their quantitative correlations with the main characteristics of the deformation process. IntroductionUltrasonic plastic deforming as a separate technological method of the hardening and finishing operations is a modification of surface hardening, i.e. diamond smoothening, which is widely used in practice. The presence of ultrasonic oscillations during diamond smoothening leads to intensifying the plastic deformation of the surface layer of the material. It gives the possibility to provide machining at smaller values of static load, which considerably increases the technological perspectives of using such a method [1][2][3][4][5][6][7]. To extend further the sphere of using ultrasonic plastic deforming of different materials, from non-ferrous metals and alloys to hardened steels and details with coatings, it is required to determine the range of the mode parameters of the process mentioned. It will allow us to control both hardening and finishing effects in machining. Theory The process of ultrasonic plastic deforming should be considered in the following way: the movement of the deformer as a component of the oscillation system after its contact with the machined surface is the excitation of free oscillations [8]. Oscillations are of a harmonic sinusoidal character, which is confirmed by the results of high-speed photography of the process [9]. The movement of the deformer after its contact with the machined surface can be described as follows:

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Обеспечение эффективности производства машиностроительной продукции должно осуществляться на всех его этапах. Предпосылки в достижении результата во многом определяются техническими и технологическими решениями, предпринятыми еще на стадии заготовительного производства. Использование перспективных технологий и оборудования получения заготов- И Н Ф О Р М А Ц И Я О С ТАТ Ь Е