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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�8 2013)
to russian

SCIENTIFIC-TECHNICAL SECTION

Krampit A. G., Krampit N. Yu., Krampit M. A. � Influence of the pulsed arc welding conditions on root layer I-grooving formation

Research results of the pulse characteristic influence on root layer formation at I-groove welding are covered.
Key words: pulsed arc welding, I-grooving, seam formation

Nemova T. N., Stepanov A. P. � Motion mechanism of the arc cathodic and anodic spots

Basic motion mechanism of an arc cathodic (anodic) spot is considered, effect of arc spots rotary motions in particular, which may be observed at small arc current. The causes of the phenomenon are explained on base of a vortical electrodynamic model of electric arc in which conducting channel in arc plasma column has a structure of a dynamic cylindrical coaxial capacitor. The phenomenon is to be taken into consideration when analysing effects in molten pool, as channel rotation of the arc plasma column accounts for effective rotary material stirring in the welding pool.
Key words: cathodic spot, anodic spots, electric arc, conducting channel, model

Shumilov V. F., Shumilova N. I. � Forming gradual transient processes in the driving gears of electric welding equipment

On the base of universal SH-class functions a new omnibus technique of gradual transient processes formation in the driving gears of electric welding equipment at mating of conditions, i.e. run-up, acceleration, braking, reverse, constancy, halt, is worked out. The method effectiveness is corroborated by the results of mathematical modelling carried out for a direct current motor of indirect excitation in the task of feed control in automatic and semiautomatic arc welding machines.
Key words: welding equipment, transient processes, reverse, direct current motor

Novokreschenov V. V., Rodyakina R. V. � Penetration depth test by dimensional analysis technique at electron-beam welding

The nature and methodology of dimensional analysis method, which allows to establish the connection between different physical parameters of analyzed process as a mathematical model up to a constant factor, were considered. The method is used to determine the relationship between the depth of penetration, the thermophysical properties of welded material and process� parameters of electron beam welding of titanium alloy, tungsten and stainless steel 18-8.
Key words: dimension of physical quantity, physical quantities, parameter, depth of penetration, electron-beam welding process, properties, ratio values, constant

Slobodyan M. S. � Analysis of electrical resistance estimation procedures of the section electrode-electrode and part-part before spot resistance microwelding

A non-traditional approach to analysis the electrical contact system of surfaces is presented. The problems of the interaction of contact elements into account their characteristics are discussed. The equations system obtained is simple in the realization.
Key words: spot contact welding, resistance plot connection

Novosadov V. S. � Use of multilayer composite solder for heat exchanger brazing

A new concept of composite solder is formulated: usage of composite soldering alloys of the Cr�Ni�Mn system as coating providing purposeful alloying of the soldered surfaces by chromium and obtainment of seams of optimal thickness less than 80 micrometers. The procedure allows obtaining qualitative joints at the temperature of optimal thermal steel treatment, exclude overbuilding-up of the cooling channels of small cross-section, raise content of chromium in the weld close to its content in steels, producing corrosion-proof joints full-strength to steel 12�18�10�, and 30 per cent reduction of produce mass.
Key words: composite brazing, coating, alloying, chromium

PRODUCTION SECTION

Kornienko M. A. � Automatic weld formation system of curvilinear joint

An automatic control system of weld formation with preset characteristic is described, in which short circuit at drop metal transfer and geometric curvature of the joint line is taken into consideration. Qualitative welded joints are provided by application of the system.
Key words: weld, short circuit, drop metal transfer, welded joints

Glazov V. V., Rabotinskiy D. N., Dyakov A. N. � Reconditioning surfacing of the drill pipes� locks

An elimination method of surfacing instability causes ensuring economically sound drill pipe repair productivity is offered. It consists in transition from single-electrode surfacing process to multi-electrode one.
Key words: reconditioning surfacing, bead, electrodes, capacity

Bernadskiy V. N. � Hybrid welding practices and joining technologies

Hybrid welding practices (laser-arc, laser-plasma, light-laser, laser submerged arc, welding of permanent joint) are considered, as well as their features and fields of application.
Key words: hybrid technology, welding, heating source, mechanical joint

Uusitalo J. � Adaptive arc parameter checkout ensure optimal quality of a welded joint

WiseFusion software tor synergetic impulse welding, MIG/MAG and arc welding with fine spray metal transfer is described.
Key words: impulse welding, arc welding, WiseFusion software, depth of penetration, weld, quality

Babenko P. G., Ivanov I. N. � High-frequency induction coils for induction brazing

Equipment for high-frequency induction heating is considered both in the field of up-to-date transistor transducers and unique design of high-frequency inductors is covered.
Key words: induction brazing, inductor, magnetic circuit, capacity

ECONOMICS AND PRODUCTION ORGANIZATION

Matveyev V. V. � Cost efficiency of railway wheel contours restoration by surfacing worn-out roll surface

Investigation results of influence of different factors on the effectiveness of wheel contours restoration by surfacing are given, in particular the attention is paid to the on-stream roll surface hardened after annealing. In order to raise effectiveness of wheel profiles repair it is suggested to use multi-electrode surfacing and thermal treatment of welded-up and grinded wheel.
Key words: efficiency, restoration, carriage wheels, roll surface defects, HFC-annealing, multielectrode surfacing

INFORMATION

Plaunov V. P., Shein Yu. F., Ilina I. I., Bereznikov Yu. I. � Seminar on soldering, dedicated to the memory of I. E. Petrunin

Ivanova N. L. � 15th International scientific-practical conference "Technologies of hardening, coating and repair: theory and practice"

Schitsin Yu. D. � International scientific and technical conference "Welding and control � 2013"

BIBLIOGRAPHY

Contents of the foreign journals on welding

RF patents for the inventions in the field of welding

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