e10

	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�10 2017)
to russian

SCIENTIFIC-TECHNICAL SECTION

Efimenko L. A., Elagina O. Yu., Kapustin �. �. � Substantiation of dependence for the carbon equivalent determination of low-carbon newgeneration tube steels

The existing dependencies analyzes for the carbon equivalent determination of traditional pipe steels was carried out. The necessity of clarification the manganese equivalence coefficients and accounting the complex effect of such carbide-forming elements as titanium, niobium, vanadium, and zirconium, depending on the carbon equivalent, is justified taking into account the alloying features of high-strength new-generation tube steels.
Key words: pipe steels, steel structure, microalloying, carbon equivalent, carbideforming elements

Varukha E. N. � Calculation of the droplets size that tear off the electrode during welding in shielding gases

Based on consideration of an idealized model of the drop let formation and transfer when welding in shielding gases, the dependence of the drop let size just before and after separation from the electrode, and of the frequency of droplets transfer for such characteristics of the welding process as the electrode diameter, it's feed speed, and segment sizes of the molten metal remaining on the tip of the electrode after the separation of the droplet, is determined.
Revealed analytical expressions give a possibility to calculate the droplets size or their transfer frequency to the optimum conditions for the welding process with controlled short circuits that ensures the maximum possible welding stability and the quality of the weld.
Key words: welding, consumable electrode, shielding gas, droplet transfer, calculation of droplet size, long arc, short circuits, reverse polarity

Sysoev Yu. S., Krivin V. V., Tolstov V. A. � Modeling of electrode melting in the development of computer 3D-simulators for teaching hand arc welding

The article describes the investigation results of distribution of time intervals between shortcuts while node molds during welding. The results are analytical distributions of random numbers as mixture of exponential and Rayleigh distributions. The method of analytical approximation of this distribution is described. It can be used to model node molding in welding training systems for flow of commands to control imitator of variable velocity of molding.
Key words: manual arc welding, shortcuts, welding training system, time between shortcuts, variable velocity of molding, distribution

Yavdoshchin I. P., Stepanyuk S. N., Gubenya I. P. � The solubility research of a welding aerosols solid component

The influence research of the slag basicity formed during welding with electrodes with a rutile coating comprising the alkali metal compounds on the solubility of the solid component of the welding aerosol in simulators of the biological medium was carried out.
It was found that an increase in basicity, as well as an increase in the content of alkaline compounds, promotes the dissolution process. The research results demonstrated that the most intensive dissolution occurs in simulators of gastric juice, while in the imitator of the respiratory system the dissolution rate is lower.
Key words: welding with rutile coated electrodes, alkali metals, welding aerosols, biological medium

PRODUCTION SECTION

Meyster R. A., Meyster A. R. � Welding on small currents at arc supply from rectifiers with capacitor voltage multiplier (review)

The publications review corresponding to welding and deposition with coated electrodes, a melting and non-consumable electrode in shielding gases, ignition of an arc in shielding gases at low currents with arc supply from rectifiers with a capacitor voltage multiplier is adduced.
Key words: small currents, welding and deposition, coated electrodes, arc ignition, welding in argon of aluminum, stainless steel in argon and nitrogen, welding on direct polarity in CO2

Ozhegov N. M., Lyalyakin V. P., Slinko D. B. � Features of thin-layer coatings by plasma-powder deposition through the use of stationary and pulsed arc

The technological possibilities of increasing the stability of the formation of thin-film coatings, taking into account the uneven heat distribution in the arc gap and the arc pressure.
The possibility to increase the melting rate of powdered filler material in the axial zone compressed arc and efficiency welding process by minimizing heat input, reduced consumption of filler material and the duration of contacting the solid and liquid phases with particle transport stream in the arc spot area in a molten state for example, highspeed welding parts machinery and equipment.
Key words: surfacing, strengthening, restoration, resource-saving technologies, flattened arc, powdered filler material, thin coating

Barabanova �. �., Polunin V. A., Salmin P. A. � Diffusion welding: possible defects of welded joints, the causes of their occurrence and methods of control

The performance of welded structures is determined by the quality of welded joints.
The defects, the identification of which is the main task of quality control, influence the most negative effect on the quality of the welded structure. Identification and elimination of defects allow improving the welding regime, which in turn leads to an improvement in the quality of welded joints and, as a result, to an increase in the productivity of the welding process. When choosing methods and means for controlling welded joint made by diffusion welding, it is necessary to have a clear idea of the nature of the defects and the causes of their appearance. Classification of defects formed during diffusion welding, the causes of their occurrence and methods of control are presented in this article.
Key words: welded joint, welded defects, quality control, diffusion welding, classification of defects

Volkov S. S., Konovalov A. V., Vybornov A. P., Golov R. S. � Technological features of ultrasonic welding of the cover to the battery body made from polyethylene

The paper presents the analysis of various existing methods for welding housings of automotive batteries from polyethylene of low pressure. The choice of the method of ultrasonic welding, the advantages of this method of welding. As a result of the analysis of the properties of various plastics for the manufacture of batteries was chosen as lowpressure polyethylene possessing higher in comparison with polypropylene frost a small tendency to cracking in low temperatures.
Key words: polyethylene, rechargeable battery, ultrasonic welding, amplitude, frequency, welding pressure, temperature, time of welding

ECONOMIC AND PRODUCTION ORGANIZATION

Frolov V. A., Putyatina L. M., Vlasenko A. N. � The labor potential development evaluation of welding production at engineering enterprises

In the article the system of indicators to assess the development of labor potential of welding production in machine-building enterprises. Provides a list of indicators used, provides calculation formulas, their analysis is carried out and the relationship between them. Reflects the major trends in individual indicators over time that determine the development of the labor potential of welding and the possibility of improving the efficiency of itsuse.
Key words: labor potential, quantitative and qualitative indicators, the rational structure of personnel, training of personnel, average tariff discharge, labour turnover, labour productivity

INFORMATION

Shirshova G. I. � Creation of electric arc welding and organization of welding production (To the 175th anniversary of the N. N. Benardos birth)

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